20-F

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 20-F

[_] REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR 12(g) OF THE

SECURITIES EXCHANGE ACT OF 1934

OR

[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2012

OR

[_] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

EXCHANGE ACT OF 1934

For the transition period from ____ to ____

OR

[_] SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of event requiring this shell company report:

Commission file number: 001-34667

SEADRILL LIMITED

(Exact name of Registrant as specified in its charter)

(Address of principal executive offices)

Bermuda

(Jurisdiction of incorporation or organization)

Par-la-Ville Place, 4th Floor, 14 Par-la-Ville Road, Hamilton, HM 08 Bermuda

(Address of principal executive offices)

Georgina Sousa

Par-la-Ville Place, 14 Par-la-Ville Road, Hamilton, HM 08, Bermuda

Tel: +1 (441) 295-9500, Fax: +1 (441) 295-3494

(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person

Securities registered or to be registered pursuant to Section 12(b) of the Act:

Common stock, $2.00 par value	New York Stock Exchange
Title of class	Name of exchange on which registered

Securities registered or to be registered pursuant to Section 12(g) of the Act:  None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: None

Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the annual report:

As of December 31, 2012, there were 469,178,074 shares, par value $2.00 per share, of the Registrant's common stock outstanding.

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

[X] Yes [_] No

If this report is an annual report or transition report, indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

[_] Yes [X] No

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

[X] Yes [_] No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months

[X] Yes [_] No

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer  [X] Accelerated filer  [_]

Non-accelerated filer   [_] (Do not check if a smaller reporting company) Smaller reporting company  [_]

Indicate by check mark which basis of accounting the Registrant has used to prepare the financial statements included in this filing:

[X]  U.S. GAAP

[_]  International Financial Reporting Standards as issued by the International Accounting Standards Board

[_]  Other

If "Other" has been checked in response to the previous question, indicate by check mark which

financial statement item the Registrant has elected to follow.

[_]  Item 17

[_]  Item 18

If this is an annual report, indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

[_]  Yes [X]  No

FORWARD LOOKING STATEMENTS

Forward-looking statements include statements concerning plans, objectives, goals, strategies, future events or performance, and underlying assumptions and other statements, which are other than statements of historical or present facts or conditions.

This Annual Report and any other written or oral statements made by us or on our behalf may include forward-looking statements which reflect our current views with respect to future events and financial performance. The words "believe," "anticipate," "intend," "estimate," "forecast," "project," "plan," "potential," "may," "should," "expect" and similar expressions identify forward-looking statements.

The forward-looking statements in this document are based upon various assumptions, many of which are based, in turn, upon further assumptions, including without limitation, management's examination of historical operating trends, data contained in our records and other data available from third parties. Although we believe that these assumptions were reasonable when made, because these assumptions are inherently subject to significant uncertainties and contingencies which are difficult or impossible to predict and are beyond our control, we cannot assure you that we will achieve or accomplish these expectations, beliefs or projections.

In addition to these important factors and matters discussed elsewhere in this Annual Report, and in the documents incorporated by reference in this Annual Report, important factors that, in our view, could cause actual results to differ materially from those discussed in the forward-looking statements include factors related to the offshore drilling market, including supply and demand, utilization rates, daily rates, customer drilling programs, commodity prices, effects of new rigs on the market and effects of declines in oil and gas prices and downturn in global economy on market outlook for our various geographical operating sectors and classes of rigs, the competitive nature of the offshore drilling industry, oil and gas prices, technological developments, political events, crew wages, drydocking, repairs and maintenance, customer contracts, including contract backlog, contract commencements, contract terminations, contract option exercises, contract revenues, contract awards and rig mobilizations, newbuildings, upgrades, shipyard and other capital projects, including completion, delivery and commencement of operations dates, expected downtime and lost revenue, the level of expected capital expenditures and the timing and cost of completion of capital projects, liquidity and adequacy of cash flow for our obligations, including our ability and the expected timing to access certain investments in highly liquid instruments, our results of operations and cash flow from operations, including revenues and expenses, uses of excess cash, including debt retirement and share repurchases under our share repurchase program, timing and proceeds of asset sales, tax matters, including our effective tax rate, changes in tax laws, treaties and regulations, tax assessments and liabilities for tax issues, including those associated with our activities in Bermuda, Norway, the United Kingdom, and the United States, legal and regulatory matters, including results and effects of legal proceedings and governmental audits and assessments, outcome and effects of internal and governmental investigations, customs and environmental matters, insurance matters, debt levels, including impacts of the financial and credit crisis, effects of accounting changes and adoption of accounting policies, investments in recruitment, retention and personnel development initiatives, pension plan and other post retirement benefit plan contributions, the timing of severance payments and benefit payments, acquisitions and divestitures of businesses and assets and the execution of transactions to acquire and divest businesses and assets, and other important factors described from time to time in the reports filed by us with the Securities and Exchange Commission, or the Commission, and the New York Stock Exchange, or NYSE. We caution readers of this Annual Report not to place undue reliance on these forward-looking statements, which speak only as of their dates.  We undertake no obligation to update any forward-looking statement or statements to reflect events or circumstances after the date on which such statement is made or to reflect the occurrence of unanticipated events. New factors emerge from time to time, and it is not possible for us to predict all of these factors. Further, we cannot assess the impact of each such factor on our business or the extent to which any factor, or combination of factors, may cause actual results to be materially different from those contained in any forward looking statement.

TABLE OF CONTENTS
		Page
PART 1
ITEM 1.	IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS	1
ITEM 2.	OFFER STATISTICS AND EXPECTED TIMETABLE	1
ITEM 3	KEY INFORMATION	1
ITEM 4.	INFORMATION ON THE COMPANY	21
ITEM 4A	UNRESOLVED STAFF COMMENTS	36
ITEM 5.	OPERATING AND FINANCIAL REVIEW AND PROSPECTS	36
ITEM 6.	DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES	59
ITEM 7.	MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS	65
ITEM 8	FINANCIAL INFORMATION	67
ITEM 9.	THE OFFER AND LISTING	68
ITEM 10.	ADDITIONAL INFORMATION	69
ITEM 11.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	81
ITEM 12.	DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES	85
PART II
ITEM 13.	DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES	85
ITEM 14.	MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS	85
ITEM 15	CONTROLS AND PROCEDURES	85
ITEM 16.	RESERVED	86
ITEM 16A.	AUDIT COMMITTEE FINANCIAL EXPERT	86
ITEM 16B.	CODE OF ETHICS	86
ITEM 16C.	PRINCIPAL ACCOUNTANT FEES AND SERVICES	87
ITEM 16D.	EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES	87
ITEM 16E.	PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS	87
ITEM 16F.	CHANGE IN REGISTRANT'S CERTIFYING ACCOUNTANT	88
ITEM 16G.	CORPORATE GOVERNANCE	88
ITEM 16H.	MINE SAFETY DISCLOSURE	88
PART III
ITEM 17.	FINANCIAL STATEMENTS	89
ITEM 18.	FINANCIAL STATEMENTS	89
ITEM 19.	EXHIBITS	89

PART 1.

ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS

Not applicable.

ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE

Not applicable.

ITEM 3. KEY INFORMATION

Throughout this Annual Report, unless the context otherwise requires, references to "Seadrill Limited," the "Company," "we," "us," "Group," "our" and words of similar import refer to Seadrill Limited, its subsidiaries and its other consolidated entities. Unless otherwise indicated, all references to "US$" and "$" in this report are to, and amounts are represented in, US dollars. Seadrill Management AS and Seadrill Management Ltd. are collectively referred to as Seadrill Management.

A. SELECTED FINANCIAL DATA

The selected statement of operations and cash flow statement data of the Company with respect to the fiscal years ended December 31, 2012, 2011 and 2010 and the selected balance sheet data of the Company with respect to the fiscal years ended December 31, 2012 and 2011 have been derived from the Company's Consolidated Financial Statements included in Item 18 of this Annual Report, which have prepared in accordance with accounting principles generally accepted in the United States, or U.S. GAAP.

The selected statement of operations and cash flow statement data for the fiscal year ended December 31, 2009 and 2008 and the selected balance sheet data with respect to the fiscal years ended December 31, 2010, 2009 and 2008 have been derived from the Consolidated Financial Statements of the Company and are not included herein.

The following table should be read in conjunction with Item 5. "Operating and Financial Review and Prospects" and the Company's Consolidated Financial Statements and Notes thereto, which are included herein. The Company's financial statements are maintained in U.S. dollars. We refer you to the Notes to our Consolidated Financial Statements for a discussion of the basis on which our Consolidated Financial Statements are presented.

	Year ended December 31,
	2012		2011			2010			2009			2008
			(In millions of U.S. dollars except common share and per share data)
Statement of Operations Data:
Total operating revenues		4,478			4,192			4,041			3,254			2,106
Net operating income		1,791			1,774			1,625			1,372			649
Net income (loss) (1)		1,205			1,482			1,172			1,353			(123	)
Earnings per share, basic	$	2.37		$	3.05		$	2.73		$	3.16		$	(0.41	)
Earnings per share, diluted	$	2.34		$	2.96		$	2.73		$	3.00		$	(0.41	)
Dividends paid (2)		1,975			1,440			990			199			688
Dividends paid per share	$	4.31		$	3.14		$	2.41			0.50			1.75

(1) In 2008, other financial items included an impairment loss of $615 million related to our investments in Pride International Inc., or Pride, Scorpion Offshore Limited, or Scorpion, and SapuraCrest Bhd, or SapuraCrest.

(2) For the year ended December 31, 2012, North Atlantic Drilling Limited, or NADL, a 73% owned subsidiary, paid $50 million in dividends to non-controlling interests. For the year ended December 31, 2011, NADL paid $17 million in dividends to non-controlling interests.

1

	Year ended December 31,
	2012			2011			2010			2009			2008
			(In millions of US dollars except common share and per share data)
Balance Sheet Data (at end of period):
Cash and cash equivalents		318			483			755			460			376
Drilling units		12,894			11,223			10,795			7,515			4,645
Newbuildings		1,882			2,531			1,247			1,431			3,661
Investment in associated companies		509			721			205			321			240
Goodwill		1,320			1,320			1,676			1,596			1,547
Total assets		19,632			18,304			17,497			13,831			12,305
Interest bearing debt (including current portion)		10,761			9,993			9,157			7,396			7,437
Share capital		938			935			886			798			797
Equity		6,024			6,302			5,937			4,813			3,222
Common shares outstanding		469.1			467.8			443.1			399.0			398.4
Weighted average common shares outstanding		468.5			458.6			409.2			398.5			398.3
Other Financial Data:
Net cash provided by operating activities (1)		1,590			1,669			1,210			1,349			344
Net cash used in investing activities (1)		(1,360)			(2,486	)		(2,207	)		(821	)		(3,790)
Net cash (used in)/provided by financing activities		(395)			538			1,293			(453	)		(2,826)
Capital expenditure		(1,690)			(2,543	)		(2,368	)		(1,369	)		(2,768)

(1) We have in 2012 and 2011 significally expanded our fleet of drilling rigs and as a result of this, our long term maintenance has increased correspondingly. In response to this, we determined that we had incorrectly classified payments related to long term maintenance as an investing activity rather than as an operating activity in the consolidated statement of cash flows.  We concluded that such classification was not material to cash flows from operating activities and investing activites for previously reported periods.  Accordingly, the presentation of the consolidated statement of cash flows for the years ended December 31, 2011, 2010, 2009 and 2008 have been revised.  This resulted in a decrease in cash provided by Operating Activities and an increase in cash on Investing Activities, of $147 million in 2011, $90 million in 2010, $103 million in 2009, and $57 million in 2008.

B. CAPITALIZATION AND INDEBTEDNESS

Not applicable.

 C. REASONS FOR THE OFFER AND USE OF PROCEEDS

Not applicable.

 D. RISK FACTORS

Our assets are primarily engaged in offshore contract drilling for the oil and gas industry in benign and harsh environments worldwide, including ultra-deepwater environments. The following summarizes risks that may materially affect our business, financial condition or results of operations. Unless otherwise indicated in this Annual Report, all information concerning our business and our assets is as of April 22, 2013.

Risks Relating to Our Industry

Our business in the offshore drilling sector depends on the level of activity in the offshore oil and gas industry, which is significantly affected by, among other things, volatile oil and gas prices, and may be materially and adversely affected by a decline in the offshore oil and gas industry.

The offshore contract drilling industry is cyclical and volatile. Our business in the offshore drilling sector depends on the level of activity in oil and gas exploration, development and production in offshore areas worldwide. The availability of quality drilling prospects, exploration success, relative production costs, the stage of reservoir development and political and regulatory environments affect our customers' drilling programs. Oil and gas prices and market expectations of potential changes in these prices also significantly affect this level of activity and demand for drilling units.

Oil and gas prices are extremely volatile and are affected by numerous factors beyond our control, including the following:

— worldwide production and demand for oil and gas;

— the cost of exploring for, developing, producing and delivering oil and gas;

— expectations regarding future energy prices;

2

— advances in exploration, development and production technology;

— the ability of the Organization of Petroleum Exporting Countries, or OPEC, to set and maintain levels and pricing;

— the level of production in non-OPEC countries;

— government regulations, including restrictions on offshore transportation of oil and natural gas;

— local and international political, economic and weather conditions;

— domestic and foreign tax policies;

— development and exploitation of alternative fuels;

— the policies of various governments regarding exploration and development of their oil and gas reserves;

— accidents, severe weather, natural disasters and other similar incidents relating to the oil and gas industry; and

— the worldwide political and military environment, including uncertainty or instability resulting from an escalation or additional outbreak of armed hostilities or other crises in the Middle East or other geographic areas or further acts of terrorism in the United States, or elsewhere.

Declines in oil and gas prices for an extended period of time, or market expectations of potential decreases in these prices, could negatively affect our business in the offshore drilling sector. Sustained periods of low oil prices typically result in reduced exploration and drilling because oil and gas companies' capital expenditure budgets are subject to cash flow from such activities and are therefore sensitive to changes in energy prices. These changes in commodity prices can have a dramatic effect on rig demand, and periods of low demand can cause excess rig supply and intensify the competition in the industry which often results in drilling units, particularly older and less technologically-advanced drilling units, being idle for long periods of time. We cannot predict the future level of demand for our services or future conditions of the oil and gas industry. Any decrease in exploration, development or production expenditures by oil and gas companies could reduce our revenues and materially harm our business and results of operations.

In addition to oil and gas prices, the offshore drilling industry is influenced by additional factors, including:

— the availability of competing offshore drilling units;

— the level of costs for associated offshore oilfield and construction services;

— oil and gas transportation costs;

— the level of rig operating costs, including crew and maintenance;

— the discovery of new oil and gas reserves;

— the cost of non-conventional hydrocarbons; and

— regulatory restrictions on offshore drilling.

Any of these factors could reduce demand for our services and adversely affect our business and results of operations.

Our business and operations involve numerous operating hazards.

Our operations are subject to hazards inherent in the drilling industry, such as blowouts, reservoir damage, loss of production, loss of well control, lost or stuck drill strings, equipment defects, punch-throughs, craterings, fires, explosions and pollution. Contract drilling and well servicing require the use of heavy equipment and exposure to hazardous conditions, which may subject us to liability claims by employees, customers and third parties. These hazards can cause personal injury or loss of life, severe damage to or destruction of property and equipment, pollution or environmental damage, claims by third parties or customers and suspension of operations. Our offshore fleet is also subject to hazards inherent in marine operations, either while on-site or during mobilization, such as capsizing, sinking, grounding, collision, damage from severe weather and marine life infestations. Operations may also be suspended because of machinery breakdowns, abnormal drilling conditions, failure of subcontractors to perform or supply goods or services or personnel shortages. We customarily provide contract indemnity to our customers for claims that could be asserted by us relating to damage to or loss of our equipment, including rigs and claims that could be asserted by us or our employees relating to personal injury or loss of life.

3

Damage to the environment could also result from our operations, particularly through spillage of fuel, lubricants or other chemicals and substances used in drilling operations, or extensive uncontrolled fires. We may also be subject to property, environmental and other damage claims by oil and gas companies. Our insurance policies and contractual rights to indemnity may not adequately cover losses, and we do not have insurance coverage or rights to indemnity for all risks. Consistent with standard industry practice, our clients generally assume, and indemnify us against, well control and subsurface risks under daily rates contracts. These are risks associated with the loss of control of a well, such as blowout or cratering, the cost to regain control of or re-drill the well and associated pollution. However, there can be no assurances that these clients will be willing or financially able to indemnify us against all these risks. In addition, a court may decide that certain indemnities in our current or future contracts are not enforceable. For example, in 2012, a U.S. District Court in the Eastern District of Louisiana invalidated certain contractual indemnities for punitive damages and for civil penalties under the U.S. Clean Water Act under a drilling contract governed by U.S. maritime law as a matter of public policy. We maintain insurance coverage for property damage, occupational injury and illness, and general and marine third-party liabilities (except as described below with respect to drilling units and equipment in the U.S. Gulf of Mexico, "GOM"). However, pollution and environmental risks generally are not totally insurable.

We maintain a portion of deductibles for damage to our offshore drilling equipment and third-party liabilities. With respect to hull and machinery we currently maintain a deductible per occurrence of $5 million for all of our fleet, except for tender barges, for which it is $1 million. However, in the event of a total loss or a constructive total loss of a drilling unit, such loss is fully covered by our insurance with no deductible. For general and marine third-party liabilities we generally maintain up to $25,000 deductible per occurrence on personal injury liability for crew claims as well as non-crew claims and per occurrence on third-party property damage, except for our drilling units operating in the U.S. GOM where the deductible is $500,000 per occurrence.

If a significant accident or other event occurs that is not fully covered by our insurance or an enforceable or recoverable indemnity from a client, the occurrence could adversely affect our consolidated statement of financial position, results of operations or cash flows. The amount of our insurance may also be less than the related impact on enterprise value after a loss. Our insurance coverage will not in all situations provide sufficient funds to protect us from all liabilities that could result from our drilling operations. Our coverage includes annual aggregate policy limits. As a result, we retain the risk through self-insurance for any losses in excess of these limits. Any such lack of reimbursement may cause us to incur substantial costs. In addition, we could decide to retain more risk through self-insurance in the future. This self-insurance results in a higher risk of losses, which could be material, that are not covered by third party insurance contracts. Specifically, we have elected to self-insure for physical damage to rigs and equipment caused by named windstorms in the U.S. GOM due to the substantial costs associated with such coverage. If such windstorms cause significant damage to any rig and equipment we have in the U.S. GOM, it could have a material adverse effect on our financial position, results of operations or cash flows. Moreover, no assurance can be made that we will be able to maintain adequate insurance in the future at rates that we consider reasonable, or obtain insurance against certain risks.

As of the date of this Annual Report, all of the drilling units that we owned or operated were covered by existing insurance policies.

An over-supply of offshore drilling units may lead to a reduction in daily rates and therefore may materially impact our revenues and profitability.

During the recent period of high utilization and high daily rates, industry participants have increased the supply of drilling units by ordering construction of new drilling units. Historically, this has resulted in an over-supply of drilling units and has caused a subsequent decline in utilization and daily rates when the drilling units have entered the market, sometimes for extended periods of time until the new units have been absorbed into the active fleet. The worldwide fleet of ultra-deepwater drilling units consisted of 128 rigs, including 64 semi-submersible rigs and 64 drillships as of April 22, 2013. An additional 14 semi-submersible rigs and 70 drillships are under construction or on order, which would bring the total fleet to 212 units. A relatively large number of the drilling units currently under construction have not been contracted for future work, which may intensify price competition as scheduled delivery dates occur and lead to a reduction in daily rates as the active fleet grows. Lower utilization and daily rates could adversely affect our revenues and profitability. Prolonged periods of low utilization and daily rates could also result in the recognition of impairment charges on our drilling units if future cash flow estimates, based on information available to management at the time, indicate that the carrying value of these drilling units may not be recoverable.

4

The market value of our current drilling units and those we acquire in the future may decrease, which could cause us to incur losses if we decide to sell them following a decline in their market values.

If the offshore contract drilling industry suffers adverse developments in the future, the fair market value of our drilling units may decline. The fair market value of the drilling units that we currently own, or may acquire in the future, may increase or decrease depending on a number of factors, including:

— general economic and market conditions affecting the offshore contract drilling industry, including competition from other offshore contract drilling companies;

— types, sizes and ages of drilling units;

— supply and demand for drilling units;

— costs of newbuildings;

— prevailing level of drilling services contract daily rates;

— governmental or other regulations; and

— technological advances.

If we sell any drilling unit at a time when prices for drilling units have fallen, such a sale may result in a loss. Such a loss could materially and adversely affect our business prospects, financial condition, liquidity, results of operations and ability to pay dividends to our shareholders.

Consolidation of suppliers may increase the cost of obtaining supplies, or restrict our ability to obtain needed supplies, which may have a material adverse effect on our results of operations and financial condition.

We rely on certain third parties to provide supplies and services necessary for our offshore drilling operations, including but not limited to drilling equipment suppliers, caters and machinery suppliers. Recent mergers have reduced the number of available suppliers, resulting in fewer alternatives for sourcing key supplies. With respect to certain items, such as blow-out preventers, or BOPs, we are dependent on the original equipment manufacturer for repair and replacement of the item or its spare parts.  For instance, we experienced an interruption of operations in early 2013 as a result of a defective batch of connector bolts procured by a supplier of BOP equipment, and the only source of approved replacement bolts was that same supplier.  Such consolidation, combined with a high volume of drilling units under construction, may result in a shortage of supplies and services thereby increasing the cost of supplies and/or potentially inhibiting the ability of suppliers to deliver on time. These cost increases or delays could have a material adverse effect on our results of operations and result in rig downtime, and delays in the repair and maintenance of our drilling rigs.

5

Our international operations in the offshore drilling sector involve additional risks, which could adversely affect our business.

We operate in various regions throughout the world. As a result of our international operations, we may be exposed to political and other uncertainties, including risks of:

— terrorist acts, armed hostilities, war and civil disturbances;

— acts of piracy, which have historically affected ocean-going vessels, trading in regions of the world such as the South China Sea and in the Gulf of Aden off the coast of Somalia and which have increased significantly in frequency since 2008, particularly in the Gulf of Aden and off the west coast of Africa;

— significant governmental influence over many aspects of local economies;

— seizure, nationalization or expropriation of property or equipment;

— repudiation, nullification, modification or renegotiation of contracts;

— limitations on insurance coverage, such as war risk coverage, in certain areas;

— political unrest;

— foreign and U.S. monetary policy and foreign currency fluctuations and devaluations;

— the inability to repatriate income or capital;

— complications associated with repairing and replacing equipment in remote locations;

— import-export quotas, wage and price controls, imposition of trade barriers;

— U.S. and foreign sanctions or trade embargoes;

— regulatory or financial requirements to comply with foreign bureaucratic actions;

— changing taxation policies, including confiscatory taxation;

— other forms of government regulation and economic conditions that are beyond our control; and

— governmental corruption.

In addition, international contract drilling operations are subject to various laws and regulations of the countries in which we operate, including laws and regulations relating to:

— the equipping and operation of drilling units;

— repatriation of foreign earnings and exchange controls;

— oil and gas exploration and development;

— taxation of offshore earnings and the earnings of expatriate personnel; and

— use and compensation of local employees and suppliers by foreign contractors.

Some foreign governments favor or effectively require (i) the awarding of drilling contracts to local contractors or to drilling rigs owned by their own citizens, (ii) the use of a local agent or (iii) foreign contractors to employ citizens of, or purchase supplies from, a particular jurisdiction. These practices may adversely affect our ability to compete in those regions. It is difficult to predict what governmental regulations may be enacted in the future that could adversely affect the international drilling industry. The actions of foreign governments, including initiatives by OPEC, may adversely affect our ability to compete. Failure to comply with applicable laws and regulations, including those relating to sanctions and export restrictions, may subject us to criminal sanctions or civil remedies, including fines, denial of export privileges, injunctions or seizures of assets.

6

If our drilling units are located in countries that are subject to economic sanctions or other operating restrictions imposed by the U.S. or other governments, our reputation and the market for our common stock could be adversely affected.

In 2010, the U.S. enacted the Comprehensive Iran Sanctions Accountability and Divestment Act or CISADA, which expanded the scope of the former Iran Sanctions Act. Among other things, CISADA expands the application of the prohibitions to non-U.S. companies, such as our Company, and introduces limits on the ability of companies and persons to do business or trade with Iran when such activities relate to the investment, supply or export of refined petroleum or petroleum products. On August 10, 2012, the U.S. signed into law the Iran Threat Reduction and Syria Human Rights Act of 2012, or the Iran Threat Reduction Act, which places further restrictions on the ability of non U.S. companies to do business or trade with Iran and Syria. Perhaps the most significant provision in the Iran Threat Reduction Act is that prohibitions in the existing Iran sanctions applicable to U.S. persons will now apply to any foreign entity owned or controlled by a U.S. person (essentially making the U.S. sanctions against Iran as expansive as U.S. sanctions against Cuba). These new sanctions were codified within the Iranian Transactions Regulations on or about December 26, 2012.  However, we do not believe this provision is applicable to us, as we are primarily owned and controlled by non U.S. persons. The other major provision in the Iran Threat Reduction Act is that issuers of securities must disclose to the SEC in their annual and quarterly reports filed after February 6, 2013 if the issuer or "any affiliate" has "knowingly" engaged in certain sanctioned activities involving Iran during the timeframe covered by the report.  The disclosure must describe the nature and extent of the activity in detail and the SEC will publish the disclosure on its website. The President of the U.S. must then initiate an investigation and determine whether sanctions on the issuer or its affiliate will be imposed. Such negative publicity and the possibility that sanctions could be imposed would present a risk for any issuer that is knowingly engaged in sanctioned conduct or that has an affiliate that is knowingly engaged in such conduct. At this time, we are not aware of any violative activity, conducted by ourselves or by any affiliate, that is likely to trigger an SEC disclosure requirement. Sanctions affecting non-U.S. companies like us were expanded yet again under the 2013 National Defense Authorization Act, with the passage of the Iran Freedom and Counter-Proliferation Act, and we believe that these sanctions will continue to become more restrictive for the foreseeable future.  In addition to the sanctions against Iran, U.S. law continues to restrict U.S. owned or controlled entities from doing business with Cuba and various U.S. sanctions have certain other extraterritorial effects that need to be considered by non U.S. companies. Moreover, any U.S. persons who serve as officers, directors or employees of our subsidiaries would be fully subject to U.S. sanctions. It should also be noted that other governments are more frequently implementing versions of U.S. sanctions. We do not currently have any drilling contracts or plans to initiate any drilling contracts involving operations in countries or with government controlled entities that are subject to sanctions and embargoes imposed by the U.S. government and/or identified by the U.S. government as state sponsors of terrorism. However, from time to time, we may enter into drilling contracts with countries or government-controlled entities that are subject to sanctions and embargoes imposed by the U.S. government and/or identified by the U.S. government as state sponsors of terrorism where entering into such contracts would not violate U.S. law, or may enter into drilling contracts involving operations in countries or with government-controlled entities that are subject to sanctions and embargoes imposed by the U.S government and/or identified by the U.S. government as state sponsors of terrorism. However, this could negatively affect our ability to obtain investors. In some cases, U.S. investors would be prohibited from investing in an arrangement in which the proceeds could directly or indirectly be transferred to a sanctioned entity. Moreover, even in cases where the investment would not violate U.S. law, potential investors could view such drilling contracts negatively, which could adversely affect our reputation and the market for our shares. As stated above, we believe that we are in compliance with all applicable sanctions and embargo laws and regulations, and intend to maintain such compliance. However, there can be no assurance that we will be in compliance in the future, particularly as the scope of certain laws may be unclear and may be subject to changing interpretations. Any such violation could result in fines or other penalties and could result in some investors deciding, or being required, to divest their interest, or not to invest, in our shares. Additionally, some investors may decide to divest their interest, or not to invest, in our shares simply because we may do business with companies that do business in sanctioned countries. Moreover, our drilling contracts may violate applicable sanctions and embargo laws and regulations as a result of actions that do not involve us, or our drilling rigs, and those violations could in turn negatively affect our reputation. Investor perception of the value of our shares may also be adversely affected by the consequences of war, the effects of terrorism, civil unrest and governmental actions in these and surrounding countries.

Our ability to operate our drilling units in the U.S. Gulf of Mexico could be restricted by governmental regulation.

Hurricanes Ivan, Katrina, Rita, Gustav and Ike caused damage to a number of drilling units unaffiliated to us in the Gulf of Mexico, or GOM. The Bureau of Ocean Energy Management, Regulation and Enforcement, or BOEMRE, formerly the Minerals Management Service of the U.S. Department of the Interior, effective October 1, 2011, reorganized into two new organizations, the Bureau of Ocean Energy Management, or BOEM, and the Bureau of Safety and Environmental Enforcement, or BSEE, and issued guidelines for tie-downs on drilling units and permanent equipment and facilities attached to outer continental shelf production platforms, and moored drilling unit fitness that apply through the 2013 hurricane season. These guidelines effectively impose new requirements on the offshore oil and natural gas industry in an attempt to increase the likelihood of survival of offshore drilling units during a hurricane. The guidelines also provide for enhanced information and data requirements from oil and natural gas companies that operate properties in the U.S. GOM region of the Outer Continental Shelf. BOEM and BSEE may issue similar guidelines for future hurricane seasons and may take other steps that could increase the cost of operations or reduce the area of operations for our ultra-deepwater drilling units, thereby reducing their marketability. Implementation of new guidelines or regulations that may apply to ultra-deepwater drilling units may subject us to increased costs and limit the operational capabilities of our drilling units, although such risks to the extent possible should rest with our clients.

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We currently do not have any jack-up rigs or moored drilling units operating in the U.S. GOM. However, we do have two ultra-deepwater semi-submersible drilling rigs contracted for operations in the U.S. GOM that are self-propelled and equipped with thrusters and other machinery, which enable the rig to move between drilling locations and remain in position while drilling without the need for anchors. Furthermore we have three ultra-deepwater drillships contracted for operations in the Mexican part of the GOM.

Public health threats could have an adverse effect on our operations and our financial results.

Public health threats, such as swine flu, bird flu, Severe Acute Respiratory Syndrome and other highly communicable diseases, outbreaks of which have already occurred in various parts of the world in which we operate, could adversely impact our operations, the operations of our customers and the global economy, including the worldwide demand for oil and gas and, ultimately, the level of demand for our services. Any of these public health threats could adversely affect our financial results.

Fluctuations in exchange rates and non-convertibility of currencies could result in losses to us.

As a result of our international operations, we are exposed to fluctuations in foreign exchange rates due to revenues being received and operating expenses paid in currencies other than U.S. dollars. Accordingly, we may experience currency exchange losses if we have not fully hedged our exposure to a foreign currency, or if revenues are received in currencies that are not readily convertible. We may also be unable to collect revenues because of a shortage of convertible currency available to the country of operation, controls over currency exchange or controls over the repatriation of income or capital.

We use the U.S. dollar as our functional currency because the majority of our revenues and expenses are denominated in U.S. dollars. Accordingly, our reporting currency is also U.S. dollars. We do, however, earn revenues and incur expenses in other currencies and there is a risk that currency fluctuations could have an adverse effect on our statements of operations and cash flows.

Governmental laws and regulations, including environmental laws and regulations, may add to our costs or limit our drilling activity.

Our business in the offshore drilling industry is affected by laws and regulations relating to the energy industry and the environment in the geographic areas where we operate. The offshore drilling industry is dependent on demand for services from the oil and gas exploration and production industry, and, accordingly, we are directly affected by the adoption of laws and regulations that, for economic, environmental or other policy reasons, curtail exploration and development drilling for oil and gas. We may be required to make significant capital expenditures to comply with governmental laws and regulations. It is also possible that these laws and regulations may, in the future, add significantly to our operating costs or significantly limit drilling activity. Our ability to compete in international contract drilling markets may be limited by foreign governmental regulations that favor or require the awarding of contracts to local contractors or by regulations requiring foreign contractors to employ citizens of, or purchase supplies from, a particular jurisdiction. Governments in some countries are increasingly active in regulating and controlling the ownership of concessions, the exploration for oil and gas, and other aspects of the oil and gas industries. Offshore drilling in certain areas has been curtailed and, in certain cases, prohibited because of concerns over protection of the environment. Operations in less developed countries can be subject to legal systems that are not as mature or predictable as those in more developed countries, which can lead to greater uncertainty in legal matters and proceedings.

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To the extent new laws are enacted or other governmental actions are taken that prohibit or restrict offshore drilling or impose additional environmental protection requirements that result in increased costs to the oil and gas industry, in general, or the offshore drilling industry, in particular, our business or prospects could be materially adversely affected. The operation of our drilling units will require certain governmental approvals, the number and prerequisites of which cannot be determined until we identify the jurisdictions in which we will operate on securing contracts for the drilling units. Depending on the jurisdiction, these governmental approvals may involve public hearings and costly undertakings on our part. We may not obtain such approvals or such approvals may not be obtained in a timely manner. If we fail to timely secure the necessary approvals or permits, our customers may have the right to terminate or seek to renegotiate their drilling contracts to our detriment. The amendment or modification of existing laws and regulations or the adoption of new laws and regulations curtailing or further regulating exploratory or development drilling and production of oil and gas could have a material adverse effect on our business, operating results or financial condition. Future earnings may be negatively affected by compliance with any such new legislation or regulations.

We are subject to complex laws and regulations, including environmental laws and regulations that can adversely affect the cost, manner or feasibility of doing business.

Our operations are subject to numerous laws and regulations in the form of international conventions and treaties, national, state and local laws and national and international regulations in force in the jurisdictions in which our drilling units operate or are registered, which can significantly affect the ownership and operation of our drilling units. These requirements include, but are not limited to, the International Convention for the Prevention of Pollution from Ships, or MARPOL, the International Convention on Civil Liability for Oil Pollution Damage of 1969, generally referred to as CLC, the International Convention on Civil Liability for Bunker Oil Pollution Damage, or Bunker Convention, the U.S. Oil Pollution Act of 1990, or OPA, the Comprehensive Environmental Response, Compensation and Liability Act, or CERCLA, the U.S. Outer Continental Shelf Lands Act, and Brazil's National Environmental Policy Law (6938/81), Environmental Crimes Law (9605/98) and Law 9966/2000 relating to pollution in Brazilian waters. Compliance with such laws, regulations and standards, where applicable, may require installation of costly equipment or operational changes and may affect the resale value or useful lifetime of our drilling units. We may also incur additional costs in order to comply with other existing and future regulatory obligations, including, but not limited to, costs relating to air emissions, including greenhouse gases, the management of ballast waters, maintenance and inspection, development and implementation of emergency procedures and insurance coverage or other financial assurance of our ability to address pollution incidents. These costs could have a material adverse effect on our business, results of operations, cash flows and financial condition. A failure to comply with applicable laws and regulations may result in administrative and civil penalties, criminal sanctions or the suspension or termination of our operations. Environmental laws often impose strict liability for remediation of spills and releases of oil and hazardous substances, which could subject us to liability without regard to whether we were negligent or at fault. Under OPA, for example, owners, operators and bareboat-charterers are jointly and severally strictly liable for the discharge of oil in U.S. waters, including the 200-nautical mile exclusive economic zone around the United States. An oil spill could result in significant liability, including fines, penalties and criminal liability and remediation costs for natural resource damages under other international and U.S. federal, state and local laws, as well as third-party damages. We are required to satisfy insurance and financial responsibility requirements for potential oil (including marine fuel) spills and other pollution incidents and our insurance may not be sufficient to cover all such risks. As a result, claims against us could result in a material adverse effect on our business, results of operations, cash flows and financial condition.

Although our drilling units are separately owned by our subsidiaries, under certain circumstances a parent company and all of the unit-owning affiliates in a group under common control engaged in a joint venture could be held liable for damages or debts owed by one of the affiliates, including liabilities for oil spills under OPA or other environmental laws. Therefore, it is possible that we could be subject to liability upon a judgment against us or any one of our subsidiaries.

Our drilling units could cause the release of oil or hazardous substances, especially as our drilling units age. Any releases may be large in quantity, above our permitted limits or occur in protected or sensitive areas where public interest groups or governmental authorities have special interests. Any releases of oil or hazardous substances could result in fines and other costs to us, such as costs to upgrade our drilling rigs, clean up the releases, and comply with more stringent requirements in our discharge permits. Moreover, these releases may result in our customers or governmental authorities suspending or terminating our operations in the affected area, which could have a material adverse effect on our business, results of operation and financial condition.

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If we are able to obtain from our customers some degree of contractual indemnification against pollution and environmental damages in our contracts, such indemnification may not be enforceable in all instances or the customer may not be financially able to comply with its indemnity obligations in all cases, and we may not be able to obtain such indemnification agreements in the future. In addition, a court may decide that certain indemnities in our current or future contracts are not enforceable. For example, in 2012, a U.S. District Court in the Eastern District of Louisiana invalidated certain contractual indemnities for punitive damages and for civil penalties under the U.S. Clean Water Act under a drilling contract governed by U.S. maritime law as a matter of public policy.

Our insurance coverage may not be available in the future, or we may not obtain certain insurance coverage. Even if insurance is available and we have obtained the coverage, it may not be adequate to cover our liabilities or our insurance underwriters may be unable to pay compensation if a significant claim should occur. Any of these scenarios could have a material adverse effect on our business, operating results and financial condition.

Climate change and regulation of greenhouse gases could have a negative impact on our business.

Due to concern over the risk of climate change, a number of countries and the United Nations' International Maritime Organization, or IMO, have adopted, or are considering the adoption of, regulatory frameworks to reduce greenhouse gas emissions. Currently, the emissions of greenhouse gases from international shipping are not subject to the Kyoto Protocol to the United Nations Framework Convention on Climate Change, which entered into force in 2005 and pursuant to which adopting countries have been required to implement national programs to reduce greenhouse gas emissions. However, in July 2011 the IMO's Maritime Environment Protection Committee, or MEPC, adopted two new sets of mandatory requirements to address greenhouse gas emissions from ships that will enter into force in January 2013. Currently operating ships will be required to develop Ship Energy Efficiency Management Plans, and minimum energy efficiency levels per capacity mile will apply to new ships. These requirements could cause us to incur additional compliance costs. The IMO is also considering the development of market-based mechanisms to reduce greenhouse gas emissions from ships. In April 2013, the European Union Parliament rejected proposed changes to the European Union Emissions law regarding carbon trading. The European Union is still considering expansion of the existing European Union emissions trading scheme to include emissions of greenhouse gases from marine vessels, including drilling units, and in January 2012, the European Commission launched a public consultation on possible measures to reduce greenhouse gas emissions from ships. In the United States, the EPA has issued a finding that greenhouse gases endanger the public health and safety and has adopted regulations to limit greenhouse gas emissions from certain mobile sources and large stationary sources. Although the mobile source emissions regulations do not apply to greenhouse gas emissions from drilling units, such regulation of drilling units is foreseeable, and the EPA has in recent years received petitions from the California Attorney General and various environmental groups seeking such regulation.

Compliance with changes in laws, regulations and obligations relating to climate change could increase our costs related to operating and maintaining our assets, and might also require us to install new emission controls, acquire allowances or pay taxes related to our greenhouse gas emissions, or administer and manage a greenhouse gas emissions program.

Additionally, adverse effects upon the oil and gas industry relating to climate change, including growing public concern about the environmental impact of climate change, may also adversely affect demand for our services. For example, increased regulation of greenhouse gases or other concerns relating to climate change may reduce the demand for oil and gas in the future or create greater incentives for use of alternative energy sources. Any long-term material adverse effect on the oil and gas industry could have a significant financial and operational adverse impact on our business.

The aftermath of the moratorium on offshore drilling in the U.S. Gulf of Mexico, and new regulations adopted as a result of the investigation into the Macondo well blowout, could negatively impact us.

In the near-term aftermath of the Deepwater Horizon Incident, in which we were not involved, that led to the Macondo well blow out situation, the U.S. government on May 30, 2010 imposed a six-month moratorium on certain drilling activities in water deeper than 500 feet in the U.S. GOM and subsequently implemented Notices to Lessees 2010-N05 and 2010 N-06, providing enhanced safety requirements applicable to all drilling activity in the U.S. GOM, including drilling activities in water shallower than 500 feet. On October 12, 2010, the U.S. government lifted the moratorium subject to compliance with the requirements set forth in Notices to Lessees 2010-N05 and 2010-N06. Additionally, all drilling in the U.S. GOM must comply with the Interim Final Rule to Enhance Safety Measures for Energy Development on the Outer Continental Shelf (Drilling Safety Rule) and the Workplace Safety Rule on Safety and Environmental Management Systems. We continue to evaluate these new measures to ensure that our rigs and equipment are in full compliance, where applicable. As new standards and procedures are being integrated into the existing framework of offshore regulatory programs, we anticipate that there may be increased costs associated with regulatory compliance and delays in obtaining permits for other operations such as recompletions, workovers and abandonment activities.

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Additional requirements could be forthcoming based on further recommendations by regulatory agencies investigating the Macondo incident. We are not able to predict the likelihood, nature or extent of additional rulemaking or when the interim rules, or any future rules, could become final. The current and future regulatory environment in the U.S. GOM could impact the demand for drilling units in the U.S. GOM in terms of overall number of rigs in operations and the technical specification required for offshore rigs to operate in the U.S. GOM. It is possible that short-term potential migration of rigs from the U.S. GOM could adversely impact dayrates levels and fleet utilization in other regions. Additional governmental regulations concerning licensing, taxation, equipment specifications, training requirements or other matters could increase the costs of our operations, and escalating costs borne by our customers, along with permitting delays, could reduce exploration and development activity in the U.S. GOM and, therefore, reduce demand for our services. In addition, insurance costs across the industry are expected to increase as a result of the Macondo incident and, in the future, certain insurance coverage is likely to become more costly, and may become less available or not available at all. We cannot predict if the U.S. government will issue new drilling permits in a timely manner, nor can we predict the potential impact of new regulations that may be forthcoming as the investigation into the Macondo well incident continues. Nor can we predict if implementation of additional regulations might subject us to increased costs of operating and/or a reduction in the area of operation in the U.S. GOM. As such, our cash flow and financial position could be adversely affected if our two ultra-deepwater drilling rigs in the U.S. GOM were subject to the risks mentioned above.

We cannot guarantee that the use of our drilling units will not infringe the intellectual property rights of others.

The majority of the intellectual property rights relating to our drilling units and related equipment are owned by our suppliers. In the event that one of our suppliers becomes involved in a dispute over infringement of intellectual property rights relating to equipment owned by us, we may lose access to repair services, replacement parts, or could be required to cease use of some equipment. In addition, our competitors may assert claims for infringement of intellectual property rights related to certain equipment on our drilling units and we may be required to stop using such equipment and/or pay damages and royalties for the use of such equipment. The consequences of technology disputes involving our suppliers or competitors could adversely affect our financial results and operations. We have provisions in some of our supply contracts to provide indemnity from the supplier against intellectual property lawsuits. However, we cannot be assured that these suppliers will be willing or financially able to honor their indemnity obligations, or guarantee that the indemnities will fully protect us from the adverse consequences of such technology disputes. We also have provisions in some of our client contracts to require the client to share some of these risks on a limited basis, but we cannot provide assurance that these provisions will fully protect us from the adverse consequences of such technology disputes.

We may not be able to keep pace with the continual and rapid technological developments that characterize the market for our services, and our failure to do so may result in our loss of market share.

The market for our services is characterized by continual and rapid technological developments that have resulted in, and will likely continue to result in, substantial improvements in equipment functions and performance. As a result, our future success and profitability will be dependent in part upon our ability to keep pace with technological developments. If we are not successful in acquiring new equipment or upgrading our existing equipment in a timely and cost-effective manner in response to technological developments or changes in standards in our industry, we could lose business and profits. In addition, current competitors or new market entrants may develop new technologies, services or standards that could render some of our services or equipment obsolete, which could have a material adverse effect on our operations.

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Failure to comply with the U.S. Foreign Corrupt Practices Act or the U.K. Bribery Act  could result in fines, criminal penalties, drilling contract terminations and an adverse effect on our business.

We currently operate, and historically have operated, our drilling units in a number of countries throughout the world, including some with developing economies. Also, the existence of state or government-owned shipbuilding enterprises puts us in contact with persons who may be considered "foreign officials" under the U.S. Foreign Corrupt Practices Act of 1977, or the FCPA,and the Bribery Act 2010 of the United Kingdom, or the UK Bribery Act. We are committed to doing business in accordance with applicable anti-corruption laws and have adopted a code of business conduct and ethics which is consistent and in full compliance with the FCPA and UK Bribery Act. We are, however, subject to the risk that we or our affiliated companies or our or their respective officers, directors, employees or agents may take actions determined to be in violation of such anti-corruption laws, including the FCPA and the UK Bribery Act. Any such violation could result in substantial fines, sanctions, civil and/or criminal penalties, curtailment of operations in certain jurisdictions, and might adversely affect our business, results of operations or financial condition. In addition, actual or alleged violations could damage our reputation and ability to do business. Furthermore, detecting, investigating and resolving actual or alleged violations is expensive and can consume significant time and attention of our senior management.

In order to effectively compete in some foreign jurisdictions, we utilize local agents and/or establish joint ventures with local operators or strategic partners. All of these activities involve interaction by our agents with non U.S. government officials. Even though some of our agents and partners may not themselves be subject to the FCPA, the UK Bribery Act or other anti-bribery laws to which we may be subject, if our agents or partners make improper payments to non U.S. government officials in connection with engagements or partnerships with us, we could be investigated and potentially found liable for violation of such anti bribery laws and could incur civil and criminal penalties and other sanctions, which could have a material adverse effect on our business and results of operation.

Acts of terrorism, piracy and political and social unrest could affect the markets for drilling services, which may have a material adverse effect on our results of operations.

Acts of terrorism, piracy and political and social unrest, brought about by world political events or otherwise, have caused instability in the world's financial and insurance markets in the past and may occur in the future. Such acts could be directed against companies such as ours. Our drilling operations could also be targeted by acts of terrorism, piracy,or acts of vandalism or sabotage carried out by environmental activist groups. In addition, acts of terrorism and social unrest could lead to increased volatility in prices for crude oil and natural gas and could affect the markets for drilling services and result in lower daily rates. Insurance premiums could increase and coverage may be unavailable in the future.

Any failure to comply with the complex laws and regulations governing international trade could adversely affect our operations.

The shipment of goods, services and technology across international borders subjects our offshore drilling segment to extensive trade laws and regulations. Import activities are governed by unique customs laws and regulations in each of the countries of operation. Moreover, many countries, including the United States, control the export and re-export of certain goods, services and technology and impose related export recordkeeping and reporting obligations. Governments also may impose economic sanctions against certain countries, persons and other entities that may restrict or prohibit transactions involving such countries, persons and entities. U.S. sanctions in particular are targeted against countries (such as Cuba, Iran, Sudan and Syria, among others) that are heavily involved in the petroleum and petrochemical industries, which includes drilling activities.

The laws and regulations concerning import activity, export recordkeeping and reporting, export control and economic sanctions are complex and constantly changing. These laws and regulations may be enacted, amended, enforced or interpreted in a manner materially impacting our operations. Shipments can be delayed and denied export or entry for a variety of reasons, some of which are outside our control and some of which may result from failure to comply with existing legal and regulatory regimes. Shipping delays or denials could cause unscheduled operational downtime. Any failure to comply with applicable legal and regulatory trading obligations could also result in criminal and civil penalties and sanctions, such as fines, imprisonment, debarment from government contracts, seizure of shipments and loss of import and export privileges.

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We may be subject to litigation, arbitration and other proceedings that could have an adverse effect on us.

We are currently involved in various litigation matters, none of which we expect to have a material adverse effect on us. We anticipate that we will be involved in litigation matters from time to time in the future. The operating hazards inherent in our business expose us to litigation, including personal injury litigation, environmental litigation, contractual litigation with clients, intellectual property litigation, tax or securities litigation, and maritime lawsuits, including the possible arrest of our drilling units. We cannot predict with certainty the outcome or effect of any claim or other litigation matter, or a combination of these. If we are involved in any future litigation, or if our positions concerning current disputes are found to be incorrect, this may have an adverse effect on our business, financial position, results of operations and ability to pay dividends, because of potential negative outcomes, the costs associated with asserting our claims or defending such lawsuits, and the diversion of management's attention to these matters.

Risks Relating to Our Company

The amount of our debt could limit our liquidity and flexibility in obtaining additional financing and in pursuing other business opportunities.

As of December 31, 2012, we had $11 billion in principal amount of interest bearing debt, representing approximately 62% of our total market capitalization. Our current indebtedness and future indebtedness that we may incur could affect our future operations, as a portion of our cash flow from operations will be dedicated to the payment of interest and principal on such debt and will not be available for other purposes. Covenants contained in our debt agreements require us to meet certain financial tests, which may affect our flexibility in planning for, and reacting to, changes in our business, may limit our ability to dispose of assets or place restrictions on the use of proceeds from such dispositions, withstand current or future economic or industry downturns and compete with others in our industry for strategic opportunities, and may limit our ability to obtain additional financing for working capital, capital expenditures, acquisitions, general corporate and other purposes. Our ability to meet our debt service obligations and to fund planned expenditures, including construction costs for our newbuilding projects, will be dependent upon our future performance, which will be subject to general economic conditions, industry cycles and financial, business and other factors affecting our operations, many of which are beyond our control. Our future cash flows may be insufficient to meet all of our debt obligations and contractual commitments, and any insufficiency could negatively impact our business. To the extent that we are unable to repay our indebtedness as it becomes due or at maturity, we may need to refinance our debt, raise new debt, sell assets or repay the debt with the proceeds from equity offerings. Additional indebtedness or equity financing may not be available to us in the future for the refinancing or repayment of existing indebtedness, and we may not be able to complete asset sales in a timely manner sufficient to make such repayments.

We may be unable to comply with covenants in our debt agreements or any future financial obligations that impose operating and financial restrictions on us.

Our debt agreements impose, and future financial obligations may impose, operating and financial restrictions on us. These restrictions may prohibit or otherwise limit our ability to, among other things:

— enter into other financing arrangements;

— incur additional indebtedness;

— create or permit liens on our assets;

— sell our drilling units or the shares of our subsidiaries;

— make investments;

— change the general nature of our business;

— pay dividends to our shareholders;

— change the management and/or ownership of the drilling units;

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— make capital expenditures; and

— compete effectively to the extent our competitors are subject to less onerous restrictions.

If we are unable to comply with the restrictions and the financial covenants in the agreements governing our indebtedness, there could be a default under the terms of these agreements, which could accelerate our repayment of funds that we have borrowed.

If we are unable to comply with the restrictions and covenants in the agreements governing our indebtedness or in current or future debt financing agreements, there could be a default under the terms of those agreements. Our ability to comply with these restrictions and covenants, including meeting financial ratios and tests, is dependent on our future performance and may be affected by events beyond our control. In addition, if we are required to deconsolidate Seadrill Partners or any other significant subsidiary, or otherwise make a significant change in accounting policy, this may result in a violation of these restrictions and covenants as of the date of the change in accounting policy. If a default occurs under these agreements, lenders could terminate their commitments to lend or accelerate the outstanding loans and declare all amounts borrowed due and payable. We pledge our drilling units as security for our indebtedness.  If our lenders were to foreclose their liens on our drilling units in the event of a default, this may impair our ability to continue our operations. As of December 31, 2012, we had $8.9 billion of interest bearing debt secured by, among other things, liens on our drilling units.  In addition, all of our loan agreements contain cross-default provisions, meaning that if we are in default under one of our loan agreements, amounts outstanding under our other loan agreements may also be accelerated and become due and payable. If any of these events occur, we cannot guarantee that our assets will be sufficient to repay in full all of our outstanding indebtedness, and we may be unable to find alternative financing. Even if we could obtain alternative financing, that financing might not be on terms that are favorable or acceptable.

We rely on a small number of customers.

Our contract drilling business is subject to the risks associated with having a limited number of customers for our services. As of December 31, 2012, our five largest customers accounted for approximately 59% of our future contracted revenues, or backlog. Our results of operations could be materially adversely affected if any of our major customers failed to compensate us for our services, were to terminate our contracts with or without cause, failed to renew its existing contracts or refused to award new contracts to us and we are unable to enter into contracts with new customers at comparable daily rates.

We are exposed to the credit risks of our key customers and certain other third parties, and non-payment by these customers and other parties could adversely affect our financial position, results of operations and cash flows.

We are subject to risks of loss resulting from non-payment or non-performance by our customers and certain other third parties. Some of these customers and other parties may be highly leveraged and subject to their own operating and regulatory risks. If any key customers or other parties default on their obligations to us, our financial results and condition could be adversely affected. Any material nonpayment or nonperformance by these entities, other key customers or certain other third parties could adversely affect our financial position, results of operations and cash flows.

Newbuilding projects and surveys are subject to risks that could cause delays or cost overruns.

As of December 31, 2012, we had an outstanding newbuilding order book with various yards for an additional 19 drilling units with corresponding contractual yard commitments totaling $5.6 billion. Since then, we have ordered four jack-up rigs, increasing our contracted yard commitments to $6.5 billion. These construction projects are subject to risks of delay or cost overruns inherent in any large construction project from numerous factors, including shortages of equipment, materials or skilled labor, unscheduled delays in the delivery of ordered materials and equipment or shipyard construction, failure of equipment to meet quality and/or performance standards, financial or operating difficulties experienced by equipment vendors or the shipyard, unanticipated actual or purported change orders, inability to obtain required permits or approvals, unanticipated cost increases between order and delivery, design or engineering changes and work stoppages and other labor disputes, adverse weather conditions or any other events of force majeure. Significant cost overruns or delays could adversely affect our financial position, results of operations and cash flows. Additionally, failure to complete a project on time may result in the delay of revenue from that rig. New drilling rigs may experience start-up difficulties following delivery or other unexpected operational problems that could result in uncompensated downtime, which also could adversely affect our financial position, results of operations and cash flows or the cancellation or termination of drilling contracts.

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Failure to secure a drilling contract prior to delivery of our newbuilding drilling rigs could adversely affect our results of operations.

We have entered into agreements with various shipbuilding yards in Singapore, South Korea and China for the construction of 23 new drilling rigs consisting of drillships, semi-submersible rigs, tender barges and jack-up rigs. We have not yet secured drilling contracts on 11 of these newbuilding rigs. Historically, the industry has at times experienced prolonged periods of overcapacity, during which many rigs were idle for long periods of time. Our failure to secure a drilling contract for any of these newbuilding rigs prior to their delivery could adversely affect our cash flows and results of operations.

Some of our offshore drilling contracts may be terminated early due to certain events.

Some of our customers have the right to terminate their drilling contracts upon the payment of an early termination fee. However, such payments may not fully compensate us for the loss of the contract. Under certain circumstances our contracts may permit customers to terminate contracts early without the payment of any termination fees, as a result of non-performance, longer periods of downtime or impaired performance caused by equipment or operational issues, or sustained periods of downtime due to force majeure events beyond our control. In addition, national oil company customers may have special termination rights by law. During periods of challenging market conditions, we may be subject to an increased risk of our clients seeking to repudiate their contracts, including through claims of non-performance. Our customers' ability to perform their obligations under their drilling contracts with us may also be negatively impacted by the prevailing uncertainty surrounding the development of the world economy and the credit markets. If our customers cancel some of our contracts, and we are unable to secure new contracts on a timely basis and on substantially similar terms, or if contracts are suspended for an extended period of time or if a number of our contracts are renegotiated, it could adversely affect our consolidated statement of financial position, results of operations or cash flows.

The provisions of the majority of our offshore rig contracts that are term contracts at fixed daily rates may not permit us fully to recoup our costs in the event of a rise in our expenses.

The majority of our drilling units are employed on long-term contracts. The average remaining contract length as of December 31, 2012, was 35 months for our floaters, 30 months for our tender rigs and 20 months for our jack-up rigs. The majority of these contracts have daily rates that are fixed over the contract term. In order to mitigate the effects of inflation on revenues from term contracts, most of our long-term contracts include escalation provisions. These provisions allow us to adjust the daily rates based on stipulated cost increases including wages, insurance and maintenance cost. However, actual cost increases may result from events or conditions that do not cause correlative changes to the applicable indices. Furthermore, certain indices are updated semi-annually, and therefore may be outdated at the time of adjustment. In addition, the adjustments are normally performed on a semi annual or annual basis. For these reasons, the timing and amount awarded as a result of such adjustments may differ from our actual cost increases, which could adversely affect our financial performance. Shorter term contracts normally do not contain escalation provisions.

Our operating and maintenance costs will not necessarily fluctuate in proportion to changes in operating revenues.

Operating revenues may fluctuate as a function of changes in supply of offshore drilling units and demand for contract drilling services, which in turn, affect daily rates, and the economic utilization and performance of our fleet of drilling units. However, our operating costs are generally related to the number of units in operation and the cost level in each country or region where the units are located. In addition, equipment maintenance costs fluctuate depending upon the type of activity that the unit is performing and the age and condition of the equipment. In connection with new assignments, we might incur expenses relating to preparation for operations under a new contract. The expenses may vary based on the scope and length of such required preparations and the duration of the contractual period over which such expenditures are amortized. In situations where our drilling units incur idle time between assignments, the opportunity to reduce the size of our crews on those drilling units is limited as the crews will be engaged in preparing the unit for its next contract. When a unit faces longer idle periods, reductions in costs may not be immediate as some of the crew may be required to prepare drilling units for stacking and maintenance in the stacking period. Should units be idle for a longer period, we will seek to redeploy crew members, who are not required to maintain the drilling units, to active rigs to the extent possible. However, there can be no assurance that we will be successful in reducing our costs in such cases.

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We may not be able to renew or obtain new and favorable contracts for drilling units whose contracts are expiring or are terminated, which could adversely affect our revenues and profitability.

As of December 31, 2012, we have eight contracts that expire in 2013, 10 contracts that expire in 2014 and 11 contracts that expire in 2015. Our ability to renew existing contracts or obtain new contracts will depend on the prevailing market conditions. Likewise, our customers may reduce their activity levels or seek to terminate or renegotiate drilling contracts with us. If we are not able to obtain new contracts in direct continuation, or if new contracts are entered into at daily rates substantially below the existing daily rates or on terms otherwise less favorable compared to existing contracts terms, such as contracts on a turnkey basis, our revenues and profitability could be adversely affected.

Our future contracted revenue, or backlog, for our fleet of drilling units may not be ultimately realized.

As of December 31, 2012, the future contracted revenue for our fleet of drilling units, or contract backlog, was approximately $21.0 billion. We may not be able to perform under these contracts due to events beyond our control, and our customers may seek to cancel or renegotiate our contracts for various reasons, including adverse conditions, resulting in lower daily rates. Our inability, or the inability of our customers to perform, under our or their contractual obligations may have a material adverse effect on our financial position, results of operations and cash flows.

Competition within the offshore drilling industry may adversely affect our results of operations and financial condition.

The offshore drilling industry is highly competitive and fragmented and includes several large companies that compete in many of the markets we serve, as well as numerous small companies that compete with us on a local basis. Offshore drilling contracts are generally awarded on a competitive bid basis or through privately negotiated transactions. In determining which qualified drilling contractor is awarded a contract, the key factors are pricing, rig availability, rig location, condition and integrity of equipment, its record of operating efficiency, including high operating uptime, technical specifications, safety performance record, crew experience, reputation, industry standing and customer relations. Our operations may be adversely affected if our current competitors or new market entrants introduce new drilling rigs with better features, performance, prices or other characteristics in comparison to our drilling rigs, or expand into service areas where we operate. In addition, mergers among oil and natural gas exploration and production companies have reduced, and may from time to time further reduce the number of available customers, which would increase the ability of potential customers to achieve pricing terms favorable to them. Competitive pressures or other factors may also result in significant price competition, particularly during industry downturns, which could have a material adverse effect on our results of operations and financial condition.

An economic downturn could have a material adverse effect on our revenue, profitability and financial position.

We depend on our customers' willingness and ability to fund operating and capital expenditures to explore, develop and produce oil and gas, and to purchase drilling and related equipment. There has historically been a strong link between the development of the world economy and demand for energy, including oil and gas. The world economy is currently facing a number of challenges. This includes uncertainty to the continuing discussions in the United States regarding the federal debt ceiling. In Europe, as a result of the continuing credit crisis, in particular in Cyprus, Greece, Italy, Ireland, Portugal and Spain, the European Commission created the European Financial Stability Facility, or the EFSF, and the European Financial Stability Mechanism, or the EFSM, to provide funding to Eurozone countries in financial difficulties that seek such support. In March 2011, the European Council agreed on the need for Eurozone countries to establish a permanent stability mechanism, the European Stability Mechanism, or the ESM, which will be activated by mutual agreement, to assume the role of the EFSF and the EFSM in providing external financial assistance to Eurozone countries after June 2013. Despite these measures, concerns persist regarding the debt burden of certain Eurozone countries and their ability to meet future financial obligations and the overall stability of the euro. An extended period of adverse development in the outlook for European countries could reduce the overall demand for oil and natural gas and for our services. These potential developments, or market perceptions concerning these and related issues, could affect our financial position, results of operations and cash available for distribution. This includes uncertainty surrounding the sovereign debt and credit crises in certain European countries. In addition, turmoil and hostilities in Korea, the Middle East, North Africa and other geographic areas and countries are adding to the overall risk picture. An extended period of adverse development in the outlook for the world economy could reduce the overall demand for oil and gas and for our services. Such changes could adversely affect our results of operations and cash flows beyond what might be offset by the simultaneous impact of possibly higher oil and gas prices.

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Failure to obtain or retain highly skilled personnel could adversely affect our operations.

We require highly skilled personnel to operate and provide technical services and support for our business. Competition for skilled and other labor required for our drilling operations has increased in recent years as the number of rigs activated or added to worldwide fleets has increased. The number of rigs in operation is continuing to grow as new units are being delivered. Furthermore, additional rigs currently under construction are expected to increase the future demand for offshore drilling crews. In some regions such as Brazil and Western Africa, limited availability of qualified personnel in combination with local regulations focusing on crew composition, are expected to further increase demand for qualified offshore drilling crews, which may increase our costs. A continued expansion of the rig fleet, improved demand for drilling services in general, coupled with shortages of qualified personnel could further create and intensify upward pressure on wages and make it more difficult for us to staff and service our rigs. Such developments could adversely affect our financial results and cash flow. Furthermore, as a result of any increased competition for people and risk for higher turnover, we may experience a reduction in the experience level of our personnel, which could lead to higher downtime and more operating incidents. In response to these labor market conditions, we have increased our efforts related to recruitment, training, development and retention programs as required to meet our anticipated personnel needs.

Our labor costs and the operating restrictions that apply to us could increase as a result of collective bargaining negotiations and changes in labor laws and regulations.

Some of our employees are represented by collective bargaining agreements. The majority of these employees work in Brazil, Mexico, Nigeria, Norway and the U.K. In addition, some of our contracted labor works under collective bargaining agreements. As part of the legal obligations in some of these agreements, we are required to contribute certain amounts to retirement funds and pension plans and are restricted in our ability to dismiss employees. In addition, many of these represented individuals are working under agreements that are subject to salary negotiation. These negotiations could result in higher personnel costs, other increased costs or increased operating restrictions that could adversely affect our financial performance.

An inability to obtain visas and work permits for our employees on a timely basis could hurt our operations and have an adverse effect on our business.

Our ability to operate worldwide depends on our ability to obtain the necessary visas and work permits for our personnel to travel in and out of, and to work in, the jurisdictions in which we operate. Governmental actions in some of the jurisdictions in which we operate may make it difficult for us to move our personnel in and out of these jurisdictions by delaying or withholding the approval of these permits. If we are not able to obtain visas and work permits for the employees we need for operating our rigs on a timely basis, or for third party technicians needed for maintenance or repairs, we might not be able to perform our obligations under our drilling contracts, which could allow our customers to cancel the contracts. If our customers cancel some of our contracts, and we are unable to secure new contracts on a timely basis and on substantially similar terms, it could adversely affect our consolidated statement of financial position, results of operations or cash flows.

The failure to consummate or integrate acquisitions of other businesses and assets in a timely and cost-effective manner could have an adverse effect on our financial condition and results of operations.

Acquisition of assets or businesses that expand our drilling operations is an important component of our business strategy. We believe that acquisition opportunities may arise from time to time, and any such acquisition could be significant. Any acquisition could involve the payment by us of a substantial amount of cash, the incurrence of a substantial amount of debt or the issuance of a substantial amount of equity. Certain acquisition and investment opportunities may not result in the consummation of a transaction.  In addition, we may not be able to obtain acceptable terms for the required financing for any such acquisition or investment that arises. We cannot predict the effect, if any, that any announcement or consummation of an acquisition would have on the trading price of our common stock. Our future acquisitions could present a number of risks, including the risk of incorrect assumptions regarding the future results of acquired operations or assets or expected cost reductions or other synergies expected to be realized as a result of acquiring operations or assets, the risk of failing to successfully and timely integrate the operations or management of any acquired businesses or assets and the risk of diverting management's attention from existing operations or other priorities. If we fail to consummate and integrate our acquisitions in a timely and cost-effective manner, our financial condition and results of operations could be adversely affected.

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We may suffer losses through our investments in other companies in the offshore drilling and oil services industry, which could have a material adverse effect on our business, financial condition, results of operation and cash flows.

We currently hold investments in several other companies in our industry that own/operate offshore drilling rigs with similar characteristics to our fleet of rigs or deliver various other services.  These investments include equity interests in Archer Limited, or Archer, Varia Perdana Bhd., or Varia Perdana, Asia Offshore Drilling Ltd., or AOD, Tioman Drilling Company Sdn Bhd, or Tioman Drilling, Sevan Drilling ASA, or Sevan, SapuraKencana Petroleum Bhd, or SapuraKencana, Seabras Sapura Participacoes SA, or Seabras Participacoes, Seabras Sapura Holdco Ltd. or Seabras Holdco, Itaunas Drilling B.V., or Itaunas, Camburi Drilling B.V., or Camburi, and Sahy Drilling B.V., or Sahy. The market value of our equity interest in these companies is likely to be volatile and could fluctuate in response to changes in oil and gas prices and activity levels in the offshore oil and gas industry.  For example, in 2012, we recognized an impairment charge of $221 million related to our investment in Archer.  If we sell our equity interest in an investment at a time when the value of such investment has fallen, we may incur a loss on the sale or an impairment loss being recognized, ultimately leading to a reduction in earnings.

We may not be able to raise equity or debt financing sufficient to execute our growth strategy and to pay the cost of all of our newbuilding drilling units, which could have a material adverse effect on our business, financial condition, results of operations and cash flows.

Our business is capital intensive and, to the extent we do not generate sufficient cash from operations, we may need to raise additional funds through public or private debt or equity offerings to execute our growth strategy and to fund our capital expenditures. Borrowings under our current credit facilities, which are subject to certain conditions, and available cash on hand are not sufficient to pay the remaining installments related to our contracted yard commitments of all of our newbuilding drilling units, which is currently $6.5 billion.  If we are not able to borrow additional funds, raise other capital or utilize available cash on hand, we may not be able to acquire these drilling units, which could have a material adverse effect on our business, financial condition, results of operations and cash flows.  If for any reason we fail to make a payment when due, which may result in a default under our newbuilding contracts, or otherwise fail to take delivery of our newbuild units, we would be prevented from realizing potential revenues from these projects, we could also lose all or a portion of our yard payments that were paid by us, which as of April 22, 2013, amounted to $2.0 billion and we could be liable for penalties and damages under such contracts.

Interest rate fluctuations could affect our earnings and cash flow.

In order to finance our growth we have incurred significant amounts of debt. With the exception of some of our bonds and convertible bonds, the large majority of our debt arrangements have floating interest rates. As such, significant movements in interest rates could have an adverse effect on our earnings and cash flow. In order to manage our exposure to interest rate fluctuations, we use interest rate swaps to effectively fix a part of our floating rate debt obligations. The principal amount covered by interest rate swaps is evaluated continuously and determined based on our debt level, our expectations regarding future interest rates and our overall financial risk exposure. As of December 31, 2012, our total floating rate debt amounted to $8.5 billion of which we had entered into interest rate swap agreements to fix the interest rate for a principal amount of $6.1 billion. The corresponding weighted average interest rate was 2.4%. Although we enter into various interest rate swap transactions to manage exposure to movements in interest rates, there can be no assurance that we will be able to continue to do so at a reasonable cost or at all. If we are unable to effectively manage our interest rate exposure through interest rate swaps, any increase in market interest rates would increase our interest rate exposure and debt service obligations, which would exacerbate the risks associated with our leveraged capital structure.

A change in tax laws of any country in which we operate could result in a higher tax expense or a higher effective tax rate on our worldwide earnings.

We conduct our operations through various subsidiaries in countries throughout the world. Tax laws, regulations and treaties are highly complex and subject to interpretation. Consequently, we are subject to changing tax laws, regulations and treaties in and between countries in which we operate, including treaties between the United States and other nations. Our income tax expense is based upon our interpretation of the tax laws in effect in various countries at the time that the expense was incurred. A change in these tax laws, regulations or treaties, including those in and involving the United States, or in the interpretation thereof, or in the valuation of our deferred tax assets, which is beyond our control could result in a materially higher tax expense or a higher effective tax rate on our worldwide earnings.

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A loss of a major tax dispute or a successful tax challenge to our operating structure, intercompany pricing policies or the taxable presence of our subsidiaries in certain countries could result in a higher tax rate on our worldwide earnings, which could result in a significant negative impact on our earnings and cash flows from operations.

Our income tax returns are subject to review and examination. We do not recognize the benefit of income tax positions we believe are more likely than not to be disallowed upon challenge by a tax authority. If any tax authority successfully challenges our operational structure, intercompany pricing policies or the taxable presence of our subsidiaries in certain countries; or if the terms of certain income tax treaties are interpreted in a manner that is adverse to our structure; or if we lose a material tax dispute in any country, our effective tax rate on our worldwide earnings could increase substantially and our earnings and cash flows from operations could be materially adversely affected. Please see Note 4 to our Consolidated Financial Statements.

United States tax authorities may treat us as a "passive foreign investment company" for United States federal income tax purposes, which may have adverse tax consequences to U.S. shareholders.

A foreign corporation will be treated as a "passive foreign investment company," or PFIC, for U.S. federal income tax purposes if either (1) at least 75% of its gross income for any taxable year consists of certain types of "passive income" or (2) at least 50% of the average value of the corporation's assets produce or are held for the production of those types of "passive income." For purposes of these tests, "passive income" includes dividends, interest, and gains from the sale or exchange of investment property and rents and royalties other than rents and royalties which are received from unrelated parties in connection with the active conduct of a trade or business. For purposes of these tests, income derived from the performance of services does not constitute "passive income." U.S. shareholders of a PFIC are subject to a disadvantageous U.S. federal income tax regime with respect to the income derived by the PFIC, the distributions they receive from the PFIC and the gain, if any, they derive from the sale or other disposition of their shares in the PFIC.

We presently believe that we are not a PFIC and do not anticipate becoming a PFIC. This is, however, a factual determination made on an annual basis and is subject to change. Therefore, we can give you no assurance as to our PFIC status.

If the IRS were to find that we are or have been a PFIC for any taxable year, our U.S. shareholders may face adverse U.S. federal income tax consequences.  Under the PFIC rules, unless those shareholders make an election available under the U.S. Internal Revenue Code, as amended (which election could itself have adverse consequences for such shareholders, as discussed below under Item 10.E "Additional Information – Taxation"), such shareholders would be liable to pay U.S. federal income tax at the then prevailing income tax rates on ordinary income plus interest upon excess distributions and upon any gain from the disposition of the common shares, as if the excess distribution or gain had been recognized ratably over the shareholder's holding period of the common shares. In the event that our shareholders face adverse U.S. federal income tax consequences as a result of investing in shares of our common stock, this could adversely affect our ability to raise additional capital through the equity markets. See Item 10.E "Additional Information – Taxation" for a more comprehensive discussion of the U.S. federal income tax consequences to U.S. shareholders if we are treated as a PFIC.

Investors are encouraged to consult their own tax advisors concerning the overall tax consequences of the ownership of the common shares arising in an investor's particular situation under U.S. federal, state, local or foreign law.

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Risks Relating to Our Common Shares

Because we are a foreign corporation, you may not have the same rights that a shareholder in a U.S. corporation may have.

We are a Bermuda exempted company limited by shares. Our memorandum of association and bye-laws and the Companies Act, 1981 of Bermuda, or the Companies Act, govern our affairs. The Companies Act does not clearly establish your rights and the fiduciary responsibilities of our directors as do statutes and judicial precedent in some U.S. jurisdictions. Therefore, it may be more difficult to protect your interests as a shareholder in relation to the actions of management, directors or controlling shareholders, than it would be for shareholders of U.S. corporations to do the same. There is a statutory remedy under Section 111 of the Companies Act which provides that a shareholder may seek redress in the courts as long as such shareholder can establish that our affairs are being conducted, or have been conducted, in a manner oppressive or prejudicial to the interests of some part of the shareholders, including such shareholder.

We are incorporated in Bermuda and it may not be possible for our investors to enforce U.S. judgments against us.

We are incorporated in Bermuda and substantially all of our assets are located outside the U.S. In addition, all of our directors and all but one of our executive officers are non-residents of the U.S., and all or a substantial portion of the assets of these non-residents are located outside the U.S. As a result, it may be difficult or impossible for U.S. investors to serve process within the U.S. upon us or our directors and executive officers, or to enforce a judgment against us for civil liabilities in U.S. courts.

In addition, you should not assume that courts in the countries in which we are incorporated or where our assets are located (1) would enforce judgments of U.S. courts obtained in actions against us based upon the civil liability provisions of applicable U.S. federal and state securities laws or (2) would enforce, in original actions, liabilities against us based on those laws.

We are subject to certain anti-takeover provisions in our constitutional documents.

Several provisions of our bye-laws may have anti-takeover effects. These provisions are intended to avoid costly takeover battles, lessen our vulnerability to a hostile change of control and enhance the ability of our board of directors to maximize shareholder value in connection with any unsolicited offer to acquire us. However, these anti-takeover provisions could also discourage, delay or prevent the merger, amalgamation or acquisition of our company by means of a tender offer, a proxy contest or otherwise, that a shareholder may consider to be in its best interest. For more detailed information, reference is made to Item 10 "Additional Information" of this Annual Report.

We depend on directors who are associated with companies that may be indirectly influenced by Mr. John Fredriksen, which may create conflicts of interest.

Mr. John Fredriksen, our President and Chairman, may have indirect influence over our principal shareholder, Hemen Holding Ltd., or Hemen, the shares of which are held in trusts, or the Trusts, established for the benefit of Mr. Fredriksen's immediate family. In addition to us, Hemen also has significant direct or indirect shareholdings, in certain other companies, including, Frontline Ltd. (NYSE: FRO), or Frontline, and Ship Finance International Limited (NYSE: SFL), or Ship Finance. In addition, Hemen owns approximately 7.8% of our minority-owned subsidiary Archer Limited (OSE:NO). Our Vice-President and director Mr. Tor Olav Trøim is also a director of Archer Limited, Golar LNG Partners LP (NASDAQ: GMLP), Golar LNG Limited (NASDAQ GS: GLNG), a company whose principal shareholder's shares are also held in the Trusts. One of our other directors, Kate Blankenship, is also a director of Frontline, NADL, Ship Finance, Golar LNG Partners LP (NASDAQ: GMLP), Golar LNG Limited and Archer Limited.  One of our other directors, Mr. Paul Leand, is also a director of Ship Finance, and another director, Mr. Bert Bekker, is also a director of Seadrill Partners. Mr. Fredriksen, Mr. Trøim and Mrs. Blankenship owe fiduciary duties to each of Seadrill, Frontline, Ship Finance and Archer Limited, as applicable, and may have conflicts of interest in matters involving or affecting us and our customers. In addition, they may have conflicts of interest when faced with decisions that could have different implications for Frontline, Archer Limited, Ship Finance, Golar LNG Partners, or Golar LNG than they do for us. We cannot assure you that any of these conflicts of interest will be resolved in our favor.

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ITEM 4.                       INFORMATION ON THE COMPANY

A. HISTORY AND DEVELOPMENT OF THE COMPANY

The Company

Seadrill Limited was incorporated in Bermuda under the Companies Act on May 10, 2005 as an exempted company limited by shares.  Our shares of common stock have been listed under the symbol "SDRL" on the Oslo Stock Exchange since November 2005 and on the New York Stock Exchange since April 2010. Our principal executive offices are located at Par-la-Ville Place, 4th Floor, 14 Par-la-Ville Road, Hamilton, HM 08, Bermuda and our telephone number is +1 (441) 295-6935.

We are an offshore drilling contractor providing worldwide offshore drilling services to the oil and gas industry. Our primary business is the ownership and operation of jack-up rigs, tender rigs, semi-submersible rigs and drillships for operations in shallow, mid and deepwater areas, and in benign and harsh environments. Through a number of acquisitions of other companies and contracts for newbuildings, we have developed into one of the world's largest international offshore drilling contractors. We own and operate a fleet of 66 offshore drilling units, which consist of 15 semi-submersible rigs, 11 drillships, 24 jack-up rigs and 16 tender rigs, including 23 units currently under construction, which consists of seven drillships, two semi-submersible rig, nine jack-up rigs and five tender rigs. The delivery schedule for our newbuildings under construction commences during the fourth quarter 2012 and ends in the fourth quarter 2015, with the majority of deliveries scheduled to be completed in 2013. See Item 5. "Operating and Financial Review and Prospects – Fleet Development." In addition, (i) we operate five tender rigs in association with Varia Perdana Sdm Bhd, or Varia Perdana, and (ii) we provide the construction supervision, project management, and commercial management to all three newbuilding jack-up rigs of Asia Offshore Drilling Ltd (AOD). The first of the newbuildings, AOD I, was completed and delivered in January 2013, and the second in April 2013.

Our majority owned subsidiary, North Atlantic Drilling Limited, or NADL, which trades on the Norwegian OTC List under the symbol "NADL", focuses entirely on harsh environment operations. Upon its foundation in 2011, NADL acquired from Seadrill five harsh environment drilling rigs and one construction contract for a semi-submersible drilling rig. NADL currently has a fleet of nine units, consisting of four semi-submersibles (including the West Hercules, which it operates on our behalf), one ultra-deepwater drillship, two jack-up rigs, and contracts for the construction of two additional drilling rigs, the West Linus, a jack up rig, and the West Rigel, a semi-submersible. NADL has submitted a registration statement to the Commission to register its common shares under the Securities Act of 1933, as amended, or the Securities Act.  Upon completion of the Commission's review process, NADL plans to commence the initial public offering of its common shares in the U.S. and list its common shares on the New York Stock Exchange. Concurrently with its initial public offering, NADL plans to offer to exchange the unregistered common shares previously issued in private placement offerings, excluding the common shares owned by us and other affiliates of NADL, for common shares that have been registered under the Securities Act.  We currently own 73% of NADL's outstanding shares.

On October 18, 2012, Seadrill Partners LLC (NYSE:SDLP), or Seadrill Partners, our then wholly owned subsidiary, launched an initial public offering in the United States of 10,062,550 common units (including the overallotment option that was granted to the underwriters and exercised), representing limited liability company interests, at $22.00 per unit.  With the proceeds of its initial public offering, Seadrill Partners acquired ownership stakes in four drilling rigs from us, the West Capricorn, West Aquarius, West Capella and the West Vencedor. We currently own 75.7% of the outstanding limited liability company interests in Seadrill Partners.

We also hold investments in several other companies in our industry that own and/or operate offshore drilling units with similar characteristics to our own fleet of rigs or deliver various oil services. These investments provide us with additional exposure to market segments in which we operate or other oil services. As of December 31, 2012 these included:

— a 39.9% equity interest in Archer Limited (OSE:ARCHER), a Bermuda oil service company;

— a 6.4% equity interest in SapuraKencana Petroleum Bhd, a Malaysian oil services company;

— a 49.0% equity interest in Varia Perdana Sdn Bhd, or Varia Perdana, a Malaysian company;

— a 66.2% equity interest in Asia Offshore Drilling Ltd. (OSE: AOD), a Bermuda offshore drilling company;

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— a 28.5% equity interest in Sevan Drilling ASA (OSE: SEVDR), a Norwegian offshore drilling company.

— a 49.0% equity interest in Tioman, a Malaysian well-service provider owned by SapuraKencana

— a 50% equity interest in Seabras Participacoes SA, a Brazilian vessel-owning company of one pipelying vessel currently under construction.

— a 50% equity interest in Seabras Sapura Holdco, a Bermuda vessel-owning company of two pipelying vessels currently under construction.

— a 30% equity interest in Itaunas, a Holland vessel-owning company of one drillship currently under construction.

— a 30% equity interest in Camburi, a Holland vessel-owning company of one drillship currently under construction.

— a 30% equity interest in Sahy, a Holland vessel-owning company of one drillship currently under construction.

 Please see Notes 13 and 16 to our Consolidated Financial Statements included in this Annual Report.

Management of the Company

Overall responsibility for the management of Seadrill Limited and its subsidiaries rests with the Board of Directors, or the Board. The Board has organized the provision of management services through a subsidiary incorporated in Norway, Seadrill Management. Effective as of January 1, 2013, the management services provided by Seadrill Management AS will provided by a new subsidiary incorporated in the United Kingdom, Seadrill Management Ltd. The Board has defined the scope and terms of the services to be provided by Seadrill Management authorizing it to run day-to-day operations. The Board must be consulted on all matters of material importance and/or of an unusual nature and, for such matters, will provide specific authorization to personnel in Seadrill Management to act on our behalf.

Development of the Company

We were established in May 2005 as a Bermuda company. On May 11, 2005, we entered into a Purchase and Subscription Agreement with three companies: Greenwich Holdings Limited, or Greenwich, Seatankers Management Co. Limited, or Seatankers, and Hemen. Pursuant to agreements, we acquired an offshore drilling fleet of three jack-up rigs and two floating production, storage and offloading vessels, or FPSOs, from Greenwich for an aggregate consideration of $310 million, and contracts for the construction of two new jack-up rigs from Seatankers for total consideration of $67 million. In addition, Hemen subscribed for 84,994,000 of our shares at a subscription price of $2.03 per share and acquired all of Greenwich's and a portion of Seatankers' interest in the assets described above. Greenwich, Seatankers and Hemen are controlled by trusts established by Mr. John Fredriksen, our President and Chairman, for the benefit of his immediate family. As a result of the related party nature of this transaction, the acquisition of these assets was accounted for as a transfer of assets under common control and recorded by Seadrill at the historical carrying values in the financial statements of Greenwich and Seatankers.

Since the acquisition of our initial fleet described above, we have entered into numerous contracts for newbuildings, secondhand units and other companies engaged in offshore drilling and related industries. As a result, our operations have expanded considerably and at December 31, 2012, we had approximately 8,700 skilled employees and a fleet of 66 units consisting of 15 semi-submersible rigs, 11 drillships, 24 jack-up rigs and 16 tender rigs, including 23 units currently under construction.

Please see Item 4D. "Information on the Company — Property, Plant and Equipment", which includes a table of all of the drilling units that we own or have contracted for delivery.

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Acquisitions, Disposals, and Other Transactions for the period from January 1, 2012 through and including December 31, 2012

Acquisitions

— In February 2012, we ordered two ultra-deepwater drillships from Samsung Heavy Industries Co. Ltd. in South Korea, or Samsung. The estimated total project price per drillship is approximately $600 million.

— In April 2012, entered into a contract with Jurong Shipyard in Singapore, for the construction of a new harsh environment semi-submersible drilling rig to be delivered by the first quarter 2015. Total estimated project price is approximately $650 million.

— In April 2012, we exercised an option to build a tender rig at the COSCO Nantong shipyard in China. The total estimated aggregate project price is approximately $135 million.

— In April 2012, we ordered an ultra-deepwater drillship from Samsung. The total estimated project price is approximately $600 million.

— In May 2012, we ordered a harsh environment ultra-deepwater semi-submersible rig at the Hyundai Samho shipyard in South Korea, or Hyundai. The total estimated project price is approximately $650 million.

— In September 2012, we ordered an ultra-deepwater drillship from the Samsung shipyard in South Korea. The total estimated project price is approximately $600 million.

— In November, 2012, we entered into an agreement with Songa Eclipse Ltd. to acquire the ultra-deepwater semi-submersible drilling rig Songa Eclipse for a purchase price of $590 million.

Other transactions

· On January 31, 2012, we raised NOK1,250 million through the issuance of a two-year senior unsecured bond. The bond bears interest at a floating rate per annum and matures on February 13, 2014. The bond is listed on the Oslo Stock Exchange.  We used a portion of the proceeds of this bond issue, NOK332 million, to repurchase our NOK500 million unsecured bond due 2012, and in September 2012, the NOK500 million bond was fully repaid.

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— In February, 2012, we disposed of our 3.5 % holding in Ensco Plc, or Ensco, which we held after Ensco acquired Pride International Inc. through a combination of cash and stock offering.

— On March 1, 2012, Hemen announced that it had sold 24 million shares and 24 million put options at a combined purchase price of NOK236.3176 per share and per seller put option. Following the completion of that transaction, Hemen owned 115,097,583 shares of us, representing 24.5% of our outstanding shares. In addition Hemen has Total Return Swap, or TRS, agreements with underlying exposure to 3.9 million shares of us.

— On March 27, 2012, NADL completed a private placement, raising $300 million through the issuance of 150 million new ordinary shares at $2.00 per share. The proceeds of the private placement were used to finance the first yard installment for a newbuilding harsh environment semi-submersible rig, repay intra-company debt to Seadrill and general corporate purposes. We purchased 75 million shares of NADL in the private placement. Following the private placement, our ownership interest in NADL was reduced from 77% to 73%.

— On May 17, 2012, SapuraCrest and Kencana Petroleum Bhd merged into a new entity SapuraKencana Petroleum Bhd, or SapuraKencana. As a consequence, our equity interest was diluted and the accounting treatment for this investment changed from being treated as an associated company to a marketable security, which is marked-to-market each quarter. In relation to the dilution, we booked a non-cash gain of $169 million. On May 30, 2012, we sold 300 million shares at MYR2.12 in the secondary market receiving gross proceeds of approximately $200 million and which resulted in an accounting gain of $84 million. This reduced our holdings of SapuraKencana to 319,540,802 shares, which is equivalent to 6.4% of the outstanding shares.

· In September, 2012, we issued $1.0 billion in aggregate principal amount of 5.625% unsecured notes due 2017 in a private offering in the United States to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain other persons outside of the United States in reliance on Regulation S under the Securities Act. We used the proceeds from the issue to repay existing indebtedness and to fund capital expenditures.

· On October 18, 2012, Seadrill Partners LLC (NYSE:SDLP), or Seadrill Partners, our then wholly owned subsidiary, launched an initial public offering in the United States of 10,062,550 common units (including the overallotment option that was granted to the underwriters and exercised), representing limited liability company interests, at $22.00 per unit.  With the proceeds of its initial public offering, Seadrill Partners acquired four ownership stakes in drilling rigs from us, the West Capricorn, West Aquarius, West Capella and the West Vencedor. We currently own 75.7% of the outstanding limited liability company interests in Seadrill Partners.

· In November 2012, after a series of share acquisitions, our ownership interest in AOD increased to 12,190,858 common shares, or 64.23%.  On November 12, 2012, we launched a mandatory offer to acquire the remaining issued and outstanding common shares of AOD for a purchase price per share of NOK28.71. We currently own 66.23% of the outstanding common shares of AOD.  

· On December 12, 2012, NADL publicly submitted its registration statement to the Commission to register its common shares under the Securities Act.  Upon completion of the Commission's review process, NADL plans to commence the initial public offering of its common shares in the U.S. and list its common shares on the New York Stock Exchange. Concurrently with its initial public offering, NADL plans to offer to exchange the unregistered common shares previously issued in private placement offerings, excluding the common shares owned by us and other affiliates of NADL, for common shares that have been registered under the Securities Act.  We currently own 73% of NADL's outstanding shares.

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· During the year 2012, we paid aggregate dividends to our shareholders in the amount of $1,925 million, or $4.31 per share.

 Recent Developments

· On January 30, 2013, the Company received and accepted an attractive offer from a commercial bank to finance its current exposure to Sevan Drilling ASA ("Sevan") through a forward agreement. The Company sold in connection with this its existing 96,000,000 shares and received a forward agreement with exposure to the same number of shares. The shares have been sold at NOK 3.95 per share. The forward agreement runs until 30 April 2013 and has a strike price of NOK 3.9851. Following the new agreement Seadrill are no longer directly owners of any shares in Sevan, but are exposed though forward agreements to 96,000,000 shares or 28.52 percent of the outstanding shares. The total ownership percentage has been calculated based on the issued share capital in Sevan of 336,625,000 shares and does not include the issuance of the new planned private placement.

· On January 31, 2013, we entered into an agreement for the construction of two high specification jack-up drilling rigs with Dalian Shipbuilding Industry Offshore Inc in China. The new units are scheduled for delivery during the first and second quarter 2015, and the estimated total project price is approximately $230 million (including project management, capitalized interest, drilling and handling tools, spares and operation preparations) per rig, with tail-heavy payment terms.

· On February 6, 2013, our subsidiary Seadrill Janus Ltd. completed the sale of the jack-up drilling unit West Janus for a total consideration of $73 million.

· On February 7, 2013, the Company participated in a private placement in Sevan Drilling ASA and was allocated 81,828,500 shares at a subscription price of NOK3.95 per share. Subsequently, Seadrill received and accepted an offer from a commercial bank to finance these shares. In connection to this, Seadrill has transferred its entire allocation to the same commercial bank and entered into a forward agreement to buy the same number of shares. The forward agreement runs until May 6, 2013 and has a strike price of NOK 3.9815 per share. Following this transaction, Seadrill will not directly hold any shares in Sevan, but will be exposed through forward agreements to 177,828,500 shares or 29.9 percent of the outstanding shares following completion of the private placement.

· On February 11, 2013, the Company and SapuraKencana Petroleum Berhad ("SapuraKencana") entered into a conditional sale and purchase agreement in relation to the proposed transaction. SapuraKencana will acquire all the tender rigs in Seadrill's fleet except for the West Vencedor, T15, and T16. These three rigs are either owned or planned to be owned by Seadrill Partners LLC. Seadrill will in a transition period in co-operation with SapuraKencana retain the management of all tender rigs that are in operation outside Asia. The agreed acquisition price is for an enterprise value of US$2.9 billion less adjustments and includes future capital commitments for newbuildings T17, T18, and West Esperanza. The Company will furthermore continue to manage and supervise the construction of the current new building program on behalf of SapuraKencana. The enterprise value includes all the debt in the tender rig business which is estimated at US$780 million as of February 6, 2013. Seadrill has agreed to pay US$75 million to SapuraKencana at closing to compensate for cash flow from the tender rig business from February 8, 2013 to closing, netted off for lost interest income. The transaction closed on April 30, 2013.

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· On February 11, 2013, the Company participated in a private placement of 82,003,000 shares in Archer Limited. The shares were acquired at price US$1.20 per share. As part of the private placement the short term unsecured loan of US$55 million granted to Archer in November was converted to shares. Furthermore, Seadrill will receive 2,811,793 shares in Archer as compensation for underwriting parts of the private placement. Following this purchase and the receipt of the underwriting commission, Seadrill will be the owner of 231,053,239 shares in Archer Limited, corresponding to 39.9% of the total number of outstanding shares in Archer Limited.

· On March 5, 2013, the Company exercised fixed price options for the construction of two high specification jack-up drilling rigs at Dalian Shipbuilding Industry Offshore Co., Ltd. in China. The estimated total project price is approximately US$230 million.

· On March 5, 2013, the Company successfully completed a NOK 1,800 million senior unsecured bond issue with maturity in 2018. An application will be made for the bonds to be listed on Oslo Børs. The net proceeds from the bond issue will be used for general corporate purposes, including payments under recently announced newbuilding contracts.

· On March 12, 2013, the Company participated in a private placement in Asia Offshore Drilling Limited (AOD). AOD raised a total of US$100 million in the private placement. Seadrill Limited and Mermaid Maritime Plc, the majority shareholders in the Company, subscribed pro-rata to the entire share capital issue. Seadrill Limited and Mermaid Maritime Plc, will own 66.18 percent and 33.76 percent of the Company respectively post the transaction.

· On March 19, 2013, the Company signed a new $1,450 million facility with various commerical lending institutions and export credit agencies, to fund the aquisition of the West Auriga and the West Vela, which have been pledged as security. The facility bears interest at LIBOR plus a margin in the range of 2.7% to 3.0%, with maturity date in 2025. As at April 30, 2013, this facility has not yet been drawn down.

· On March 25, 2013, the Company and the other major shareholder in AOD, Mermaid Maritime Plc, signed a shareholder resolution that changed the board composition in favor of the Company. Based on this change we now control the Board and therefore also the company considering the fact that we as of March 25th owned 66.18% of the shares in AOD. March 25th is considered the acquisition date and we have concluded that we will consolidate the financial results and balance sheet of AOD from this date. The acquisition is considered to constitute a business combination achieved in stages for accounting purposes. The Company is still in the process of determining the accounting consequences due to the acquisition being recently completed.

B. BUSINESS OVERVIEW

We are an offshore drilling contractor providing global offshore drilling services to the oil and gas industry. We have a versatile fleet of drilling units that is outfitted to operate in shallow water, mid-water and deepwater areas, in benign and harsh environments. Our customers are national, international and independent oil companies. The various types of drilling units in our fleet are as follows:

Semi-submersible drilling rigs

Semi-submersible drilling rigs consist of an upper working and living quarters deck resting on vertical columns connected to lower hull pontoons. Such rigs operate in a "semi-submerged" floating position, in which the lower hull is below the waterline and the upper deck protrudes above the surface. The rig is situated over a wellhead location and remains stable for drilling in the semi-submerged floating position, due in part to its wave transparency characteristics at the water line.

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There are two types of semi-submersible rigs, moored and dynamically positioned. Moored semi-submersible rigs are positioned over the wellhead location with anchors, while the dynamically positioned semi-submersible rigs are positioned over the wellhead location by a computer-controlled thruster system. Depending on country of operation, semi-submersible rigs generally operate with crews of 65 to 100 people.

Drillships

Our drillships are self-propelled ships equipped for drilling in deep waters, and are positioned over the well through a computer-controlled thruster system similar to that used on semi-submersible rigs. Drillships are suitable for drilling in remote locations because of their mobility and large load-carrying capacity. Depending on country of operation, drillships operate with crews of 65 to 100 people.

Jack-Up Rigs

Jack-up rigs are mobile, self-elevating drilling platforms equipped with legs that are lowered to the ocean floor. A jack-up rig is towed to the drill site with its hull riding in the sea as a vessel and its legs raised. At the drill site, the legs are lowered until they penetrate the sea bed and the hull is elevated until it is above the surface of the water. After completion of the drilling operations, the hull is lowered until it rests on the water, the legs are raised and the rig can be relocated to another drill site. Jack-ups are generally suitable for water depths of 450 feet or less and operate with crews of 40 to 60 people.

Tender Rigs

Self-erecting tender rigs conduct production drilling from fixed or floating platforms. During drilling operations, the tender rig is moored next to the platform. The modularized drilling package, stored on the deck during transit, is lifted prior to commencement of operations onto the platform by the rig's integral crane. To support the operations, the tender rig contains living quarters, helicopter deck, storage for drilling supplies, power machinery for running the drilling equipment and well completion equipment. There are two types of tender rigs, barge type and semi-submersible (semi-tender) type. Tender barges and semi-tenders are equipped with similar equipment but the semi-tender's semi-submersible hull structure allows the unit to operate in rougher weather conditions. Self-erecting tender rigs allow for drilling operations to be performed from platforms without the need for permanently installed drilling packages. Self-erecting tender rigs generally operate with crews of 60 to 85 people.

Reporting Segments

We report our business in the following operating segments:

— Floaters: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to semi-submersible rigs and drillships for harsh and benign environments in mid-, deep- and ultra-deep waters.

— Jack-up rigs: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to jack-up rigs for operations in harsh and benign environments.

— Tender Rigs: We operate self-erecting tender barges and semi-submersible tender rigs, which are used for production drilling and well maintenance in Southeast Asia and West Africa.

Information regarding our revenues, segment operating profit or loss and total assets attributable to each operating segment for the last three fiscal years is presented in Note 3 to our Consolidated Financial Statements included in this Annual Report.  Information regarding our operating revenues and identifiable assets attributable to each of our geographic areas of operations for the last three fiscal years is also presented in Note 3 to our Consolidated Financial Statements included in this Annual Report.

Until first quarter of 2011, we reported the following three operating segments:

— Mobile units: We offer services encompassing drilling, completion and maintenance of offshore wells.  The drilling contracts relate to semi-submersible rigs, jack-up rigs and drillships.

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— Tender Rigs: We operate self-erecting tender rigs and semi-submersible tender rigs, which are used for production drilling and well maintenance in Southeast Asia and West Africa.

— Well Services: We provide services using platform drilling, facility engineering, modular rig, well intervention and oilfield technologies.

The change in operating segments occurred following our review of our internal structure, including our operating and reporting business segments, and was due to significant growth in operations through acquisitions of new rigs, newbuilding orders and the deconsolidation of Archer Limited (formerly Seawell Limited) in early 2011.

Our Business Strategy

Our primary objective is to profitably grow our business to increase long-term distributable cash flow per share to our shareholders.

Our business strategy is to focus our company on modern, technologically advanced, offshore drilling units with our main focus on deepwater operations. We believe that we have one of the most modern fleets in the industry and believe that by combining quality assets and experienced and skilled employees we will be able to provide our customers with safe and effective operations, and establish and maintain a position as a preferred provider of offshore drilling services for our customers. We believe that a combination of quality drilling rigs and highly skilled employees will facilitate the procurement of term contracts and premium daily rates, and further, that the combination quality drilling rigs and term contracts will provide us with the opportunity to obtain debt financing for such growth, and allow us to increase the return on our invested equity.

The key elements in our strategy are as follows:

— commitment to provide customers with safe and effective operations;

— combine technologically advanced mobile drilling units with experienced and skilled employees;

— growth through targeted alliances, purchase of newbuildings, mergers and acquisitions;

— develop our strong position in deepwater and harsh environments; and

— continue to develop our fleet of premium jack-ups.

We believe that consolidation in the offshore drilling rig industry would improve the pricing and earnings visibility for our services. Accordingly, we actively look for growth opportunities and intend to take part in the future consolidation of our industry if we determine that potential transactions are in the best interest of our shareholders. Such opportunities may be in the form of transactions for specific offshore drilling rigs or companies.

Market Overview

We provide operations in oil and gas exploration and development in regions throughout the world and our customers include major oil and gas companies, state-owned national oil companies and independent oil and gas companies. Our customers have experienced higher oil prices and significantly increased revenues over the last decade. The increase has been related to higher demand for oil and limited increase in available oil production to offset the growth in demand. Over the same period, the depletion rate for existing oil production has risen and replacement rates for oil reserves have fallen for most oil producers, highlighting the shortfall in exploration and production spending to meet future demand. In response to this development, oil producers, particularly super-majors, majors and national oil companies, have devoted more of their activities to identifying replacements for existing production in new geographical areas at increasing water depths. This has translated into an increased focus on frontier deepwater, not only in existing offshore regions such as Brazil, the U.S. GOM, Europe and West Africa but also expanding to India, Southeast Asia, China, East Africa, the Mexican GOM, Australasia and the Mediterranean. Significant exploration success in these areas has translated into higher demand for rigs.

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The global fleet of drilling units

The global fleet of offshore drilling units consists of drillships, semi-submersible rigs, jack-up rigs and tender rigs. The existing world wide fleet as at April 22, 2013 totals 825 units including 86 drillships, 217 semi-submersible rigs, 492 jack-up rigs and 30 tender rigs. In addition, there are 72 drillships, 103 jack-up rigs, 20 semi-submersible rigs and 13 tender rigs under construction. The water depth capacities for the various drilling rig types depend on rig specifications, capabilities and equipment outfitting. Jack-up rigs normally work in water depths up to 450ft while semi-submersible rigs and drillships can work in water depths up to 12,000ft and tender rigs work in water depths up to 410ft for tender barges and up to 6,000ft for semi-tenders. All offshore rigs are capable of working in benign environment but there are certain additional requirements for rigs to operate in harsh environments due to extreme marine and climatic conditions, as well as, temperatures. The number of units outfitted for such operations are limited and the present number of rigs operating in harsh environment totals 40 units.

Semi-submersible rigs and drillships

The world fleet of semi-submersible rigs and drillships currently totals 303 units. In addition, there are 92 units under construction, 20 semi-submersible rigs and 72 drillships. Of the total fleet, 152 units were built before 1998. These units are mainly moored units and have an average age of some 33 years. For the existing 151 rigs built after 1998, the majority have been outfitted with thrusters allowing for dynamic positioning. 141 of the 151 units are capable of operations in deepwater waters (waters deeper than 4,500ft but less than 7,500ft) and 128 of the 141 units are capable of operations in ultra-deep waters (waters deeper than 7,500ft).

The demand for dynamically positioned drillships and semi-submersible rigs has seen strong growth since 2005. The reason for this increase in demand has been related to growth in deepwater activities by oil companies. In addition to increased demand, the oil companies have also required higher operational capacities and technical specification of the units. In order to meet demand, a significant number of new rigs have been built since 2005 increasing the number of dynamically positioned drillships and semi-submersible rigs with ultra-deepwater capabilities from 28 to 123. In order to justify the significant investments, daily rates increased from approximately $290,000 in May 2005, when the first new units were ordered, to more than approximately $600,000 at the height of the market in September 2008. The financial downturn in the latter part of 2008 and subsequent drop in oil prices effectively halted the order flow for new deepwater vessels. In response to this oil price development, oil companies held back new spending and investments in deeper water, resulting in daily rates decreasing to the low $400,000s in 2010. Since then, higher oil prices and an improved economic outlook has spurred a higher activity level from oil companies that has increased the demand for ultra-deepwater units resulting in renewed interest for construction of further new ultra-deepwater units, as well as, pushing daily rates up. At present the levels for daily rates are in the range of $550,000 to $650,000.

We believe that the long-term prospects for deepwater and ultra-deepwater drilling are positive given the expected growth in oil consumption from developing nations, limited or negative growth in oil reserves, and high depletion rate of mature oil fields. We believe that these factors will continue to provide incentives for the exploration and development of deepwater fields, particularly in view of recent geologic successes in Brazil, GOM, East and West Africa, as well as, other regions, along with improving access to new promising offshore areas and new, more efficient technologies.

Jack-up rigs

The world fleet of jack-up rigs as at April 22, 2013, totals 492. Of these rigs, 431 rigs are operational, 15 are warm-stacked and 41 are cold-stacked. In addition, there are 103 units under construction. The existing world fleet includes 53 units equipped and outfitted for operations in harsh environments of which 12 rigs are approved for operations in Norway. Out of the rigs currently under construction, 32 will have harsh environment capabilities but only 4 will be outfitted for operations in Norway. The average age of the existing fleet is currently 24 years for the benign environment units and 17 years for the harsh environment units. The overall utilization rate for jack-up rigs is 85% while the utilization rate for benign environment jack-up rigs built after 2005 is 92% and the utilization rate for the harsh environment rigs is 98%. Of the existing fleet, 165 rigs are capable of drilling in water depths higher than 350ft.

Daily rate for jack-up rigs depends on country, region, water depth, capabilities, technical specification, contract length and overall contract terms. For harsh environment jack-ups operating in Norway, current daily rates are in the range of $340,000 to $370,000 for newer rigs whereas daily rates for harsh environment jack-ups in the U.K. and Canada are in the range of $210,000 to $240,000. For benign environment jack-up rigs, daily rates are in the range of $140,000 to $180,000 for new premium rigs and in the range of $80,000 to $130,000 for older jack-up rigs. Premium jack-up rigs are defined as jack-up rigs with water depth capacity greater than 350ft built after year 2000.

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We believe the trend is for oil companies to gradually replace older jack-up rigs with new, modern and efficient rigs due to wells becoming technically more challenging and consequently more demanding with respect to rig equipment capabilities. Such oil companies are requiring, among others, units that can offer higher hook-loads, water depth capacities, extended cantilever-reach and increased flexibility for offline activities. We are of the opinion that this development provides for a sound market outlook for our premium jack-up rigs.

Tender rigs

As at April 22, 2013 there are 43 self-erecting tender rigs globally including 13 units under construction. Out of the 43 rigs, 29 are barges and 14 are semi-submersibles (semi-tenders) of which there are eight barges and five semi-tenders under construction. The main markets for tender rigs are West Africa and Southeast Asia, employing 17% and 80% of tender rigs respectively. However, during 2011, one unit started operations in Trinidad and Tobago in the Americas. The overall utilization rate for the world tender rig fleet is 87%, 86% for the barges and 89% for the semi-tenders. This reflects that there are three stacked tender barges and one stacked semi-tender rig. The daily rate for tender rigs depends on country, region, water depth, capabilities, technical specification, contract length and overall contract terms. In general, daily rates are up to approximately $135,000 for modern tender barges and up to $235,000 for modern semi-tenders.

We are the largest operator in this segment operating a fleet of 15 units, including five units that we operate in association with Varia Perdana. In addition, we have four tender barges and one semi-tender under construction. We believe that the long-term outlook for tender rigs remains favorable due to their operational versatility and lower construction costs compared to jack-up rigs. In addition, in recent years, a combination of tender rigs and floating platforms, such as mini tension-leg platforms and spar platforms, has been used in the development of deepwater oilfields, which has increased the market for tender rigs. Interest in tender rigs has also been shown beyond the traditional West Africa and Southeast Asia markets with future opportunities expected in the GOM, South and Central America and Australia. As tender rigs are primarily used for development drilling, they normally are awarded long term contracts.

The above overview of the various offshore drilling sectors is based on previous market developments and current market conditions. Future markets conditions and developments cannot be predicted and may well differ from our current expectations.

Seasonality

In general, seasonal factors do not have a significant direct effect on our business as most of our drilling units are contracted for periods of at least 12 months. However, we have operations in certain parts of the world where weather conditions during parts of the year could adversely impact the operational utilization of the rigs and our ability to relocate rigs between drilling locations, and as such, limit contract opportunities in the short term. Such adverse weather could include the hurricane season for our operations in the U.S. GOM, the winter season in offshore Norway, and the monsoon season in Southeast Asia.

Customers

Our customers are oil and gas exploration and production companies, including major integrated oil companies, independent oil and gas producers and government-owned oil and gas companies. In the year ended December 31, 2012 our five largest customers were:

— Petroleo Brasileiro S.A., or Petrobras, which accounted for approximately 15% of our revenues;

— Total S.A. Group, or Total, which accounted for approximately 14% of our revenues;

— Royal Dutch Shell, or Shell, which accounted for approximately 10% of our revenues;

— Exxon Mobil Corp, or Exxon, which accounted for approximately 11% of our revenues; and

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— Statoil ASA, or Statoil, which accounted for approximately 9% of our revenues.

Most of our drilling units are contracted to customers for periods between one and five years ahead, and our future contracted revenue, or backlog, at December 31, 2012 totaled approximately $21.0 billion, with $15.6 billion of this amount attributable to our semi-submersible rigs and drillships.  We expect approximately $5.0 billion of our backlog to be realized in 2013. Backlog for our drilling fleet is calculated as the contract daily rate multiplied by the number of days remaining on the contract, assuming full utilization. Backlog excludes revenues for mobilization and demobilization, contract preparation, and customer reimbursables.  The amount of actual revenues earned and the actual periods during which revenues are earned will be different from the backlog projections due to various factors.  Downtime, caused by unscheduled repairs, maintenance, weather and other operating factors, may result in lower applicable daily rates than the full contractual operating daily rate.

The following table shows the percentage of rig days committed by year as of December 31, 2012. The percentage of rig days committed is calculated as the ratio of total days committed under contracts to total available days in the period. Total available days for our units under construction are based on their expected delivery dates.

	Year ending December 31,
% of rig-days committed	2013			2014			2015
Jack-up rigs		80	%		47	%		33%
Semi-submersible rigs		100	%		92	%		65%
Drillships		100	%		72	%		46%
Tender rigs		99	%		82	%		40%

Competition

The offshore drilling industry is highly competitive, with market participants ranging from large multinational companies to small locally-owned companies.

The demand for offshore drilling services is driven by oil and gas companies' exploration and development drilling programs. These drilling programs are affected by oil and gas companies' expectations regarding oil and gas prices, anticipated production levels, worldwide demand for oil and gas products and many other factors. The availability of quality drilling prospects, exploration success, availability of qualified rigs and operating personnel, relative production costs, availability and lead time requirements for drilling and production equipment, the stage of reservoir development and political and regulatory environments also affect our customers' drilling programs. Oil and gas prices are volatile, which has historically led to significant fluctuations in expenditures by our customers for drilling services. Variations in market conditions during cycles impact us in different ways, depending primarily on the length of drilling contracts in different regions. For example, contracts in shallow waters for jack-up rig activities are shorter term, so a deterioration or improvement in market conditions for such units tends to quickly impact revenues and cash flows from those operations. On the other hand, contracts in deepwater for semi-submersible rigs and drillships tend to be longer term, so a change in market conditions tends to have a delayed impact. Accordingly, short-term changes in these markets may have a minimal short-term impact on revenues and cash flows, unless the timing of contract renewals coincides with short-term movements in the market.

Offshore drilling contracts are generally awarded on a competitive bid basis. In determining which qualified drilling contractor is awarded a contract, the key factors are pricing, rig availability and sustainability, rig location, condition of equipment, operating integrity, safety performance record, crew experience, reputation, industry standing and client relations.

Furthermore, competition for offshore drilling rigs is generally on a global basis, as rigs are highly mobile. However, the cost associated with mobilizing rigs between regions is sometimes substantial, as entering a new region could necessitate upgrades of the unit and its equipment to specific regional requirements. In particular, for rigs to operate in harsh environments, such as offshore Norway and Canada, as opposed to benign environments, such as the U.S. GOM, West Africa, Brazil, the Mediterranean and Southeast Asia, more demanding weather conditions would require more costly investment in the outfitting and maintenance of the drilling units.

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We believe that the market for drilling contracts will continue to be highly competitive for the foreseeable future.

Risk of Loss and Insurance

Our operations are subject to hazards inherent in the drilling of oil and gas wells, including blowouts and well fires, which could cause personal injury, suspend drilling operations, or seriously damage or destroy the equipment involved. Offshore drilling contractors such as us are also subject to hazards particular to marine operations, including capsizing, grounding, collision and loss or damage from severe weather. Our marine insurance package policy provides insurance coverage for physical damage to our rigs, loss of hire for some of our rigs and third party liability.

Our insurance claims are subject to a deductible, or non-recoverable, amount.  We currently maintain a deductible per occurrence of up to $5 million related to physical damage to our rigs.  However, a total loss of, or a constructive total loss of, a drilling unit is recoverable without being subject to a deductible.  For general and marine third-party liabilities, we generally maintain a deductible of up to $500,000 per occurrence on personal injury liability for crew claims, non-crew claims and third-party property damage including oil pollution from the drilling units.  Furthermore, for some of our rigs we purchase insurance to cover loss due to the drilling unit being wholly or partially deprived of income as a consequence of damage to the unit. The loss of hire insurance has a deductible period of 60 days after the occurrence of physical damage. Thereafter, our insurance policies are limited to 290 days. If the repair period for any physical damage exceeds the number of days permitted under our loss of hire policy, we will be responsible for the costs in such period. We do not have loss of hire insurance on our benign environment jack-up rigs and tender rigs with the exception of three semi-tender rigs.

We have elected to self-insure for physical damage to rigs and equipment caused by named windstorms in the U.S. GOM due to the substantial costs associated with such coverage. This results in a higher risk of losses, which could be material, that are not covered by third party insurance contracts.

Environmental and Other Regulations in the Offshore Drilling Industry

Our operations are subject to numerous laws and regulations in the form of international conventions and treaties, national, state and local laws and national and international regulations in force in the jurisdictions in which our drilling units operate or are registered, which can significantly affect the ownership and operation of our drilling units. These requirements include, but are not limited to, the International Convention for the Prevention of Pollution from Ships, or MARPOL, the International Convention on Civil Liability for Bunker Oil Pollution Damage of 2001 (ratified in 2008), or Bunker Convention, the International Convention for the Safety of Life at Sea of 1974, or SOLAS, the International Safety Management Code for the Safe Operation of Ships and for Pollution Prevention, or ISM Code, the International Convention for the Control and Management of Ships' Ballast Water and Sediments in February 2004, or the BWM Convention, the U.S. Oil Pollution Act of 1990, or OPA, the Comprehensive Environmental Response, Compensation and Liability Act, or CERCLA, the U.S. Clean Water Act, the U.S. Clean Air Act, the U.S. Outer Continental Shelf Lands Act, the U.S. Maritime Transportation Security Act of 2002, or the MTSA, European Union regulations, and Brazil's National Environmental Policy Law (6938/81), Environmental Crimes Law (9605/98) and Law (9966/2000) relating to pollution in Brazilian waters. These laws govern the discharge of materials into the environment or otherwise relate to environmental protection. In certain circumstances, these laws may impose strict liability, rendering us liable for environmental and natural resource damages without regard to negligence or fault on our part.

For example, the United Nations' International Maritime Organization, or IMO, has adopted MARPOL. Annex VI to MARPOL regulates harmful air emissions from ships, which include rigs and drillships. Amendments to the Annex VI regulations which entered into force on July 1, 2010, require a progressive reduction of sulfur oxide levels in heavy bunker fuels and create more stringent nitrogen oxide emissions standards for marine engines in the future. We may incur costs to comply with these revised standards. Rigs and drillships must comply with MARPOL limits on sulfur oxide and nitrogen oxide emissions, chlorofluorocarbons, and the discharge of other air pollutants, except that the MARPOL limits do not apply to emissions that are directly related to drilling, production, or processing activities.

Our drilling units are subject not only to MARPOL regulation of air emissions, but also to the Bunker Convention's strict liability for pollution damage caused by discharges of bunker fuel in jurisdictional waters of ratifying states. We believe that all of our drilling units are currently compliant in all material respects with these regulations.

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Furthermore, any drillships that we may operate in United States waters, including the U.S. territorial sea and the 200 nautical mile exclusive economic zone around the United States, would have to comply with OPA and CERCLA requirements, among others, that impose liability (unless the spill results solely from the act or omission of a third party, an act of God or an act of war) for all containment and clean-up costs and other damages arising from discharges of oil or other hazardous substances, other than discharges related to drilling.

The U.S. BSEE periodically issues guidelines for rig fitness requirements in the Gulf of Mexico and may take other steps that could increase the cost of operations or reduce the area of operations for our units, thus reducing their marketability. Implementation of BSEE guidelines or regulations may subject us to increased costs or limit the operational capabilities of our units and could materially and adversely affect our operations and financial condition.

Numerous governmental agencies issue regulations to implement and enforce the laws of the applicable jurisdiction, which often involve lengthy permitting procedures, impose difficult and costly compliance measures, particularly in ecologically sensitive areas, and subject operators to substantial administrative, civil and criminal penalties or may result in injunctive relief for failure to comply. Some of these laws contain criminal sanctions in addition to civil penalties. Changes in environmental laws and regulations occur frequently, and any changes that result in more stringent and costly compliance or limit contract drilling opportunities, including changes in response to a serious marine incident that results in significant oil pollution or otherwise causes significant adverse environmental impact, such as the April 2010 Deepwater Horizon oil spill in the Gulf of Mexico, could adversely affect our financial results. While we believe that we are in substantial compliance with the current laws and regulations, there is no assurance that compliance can be maintained in the future.

In addition to the MARPOL, OPA, and CERCLA requirements described above, our international operations in the offshore drilling segment are subject to various other international conventions and laws and regulations in countries in which we operate, including laws and regulations relating to the importation of and operation of drilling units and equipment, currency conversions and repatriation, oil and gas exploration and development, environmental protection, taxation of offshore earnings and earnings of expatriate personnel, the use of local employees and suppliers by foreign contractors and duties on the importation and exportation of drilling units and other equipment. New environmental or safety laws and regulations could be enacted, which could adversely affect our ability to operate in certain jurisdictions. Governments in some countries have become increasingly active in regulating and controlling the ownership of concessions and companies holding concessions, the exploration for oil and gas and other aspects of the oil and gas industries in their countries. In some areas of the world, this governmental activity has adversely affected the amount of exploration and development work done by major oil and gas companies and may continue to do so. Operations in less developed countries can be subject to legal systems that are not as mature or predictable as those in more developed countries, which can lead to greater uncertainty in legal matters and proceedings.

Implementation of new environmental laws or regulations that may apply to ultra-deepwater drilling units may subject us to increased costs or limit the operational capabilities of our drilling units and could materially and adversely affect our operations and financial condition. In addition to the regulatory changes taking place in the United States, other countries have announced that they are undertaking a review of the regulation of offshore drilling industry following the Deepwater Horizon Incident. A discussion of risks relating to environmental regulations can be found in Item 3 "Risk Factors" of this Annual Report.

In the United States in 2010, the Department of the Interior undertook a substantial reorganization of regulatory authority for offshore drilling following the fire and explosion that took place on the unaffiliated Deepwater Horizon Mobile Offshore Drilling Unit in the GOM in April 2010, or the Deepwater Horizon Incident. Primary regulatory responsibility for offshore drilling was transferred fromthe U.S. Department of the Interior's Minerals Management Service to a new department, the Bureau of Ocean Energy Management, Regulation and Enforcement, or BOEMRE.  On October 1, 2011, BOEMRE was reorganized into two new organizations, the Bureau of Ocean Energy Management, or BOEM, and the Bureau of Safety and Environmental Enforcement, or BSEE.  As a result of this reorganization, BSEE is now responsible for the issuance of permits for offshore drilling activities and BOEM for all oil and gas leasing activities that were previously handled by BOEMRE.  The moratorium preventing the issuance of offshore drilling permits that was put in place in May of 2010 was subsequently lifted in October 2010, thus allowing permitting to resume.  However, the first permit was not actually issued until February of 2011, and the number of permits issued since has not yet returned to levels that existed prior to the Deepwater Horizon Incident. It is not known when or whether the number of permits issued will be sufficient to sustain levels of deepwater drilling activity comparable to levels prior to the Deepwater Horizon Incident.  The BSEE periodically issues guidelines for rig fitness requirements in the GOM and may take other steps that could increase the costs of operations or reduce the area of operations for our rigs, thus reducing their marketability. . In April 2013, BSEE issued a final rule, Safety and Environmental Management Systems II (SEMS II), that would amend the Workplace Safety Rule by requiring the imposition of certain added safety procedures to a company's SEMS and not covered by the original rule and revising existing obligations that a company's SEMS be audited by requiring the use of an independent third party auditor who has been pre approved by the agency to perform the auditing task. On August 15, 2012, the BSEE issued the Final Drilling Safety Rule which finalizes safety reforms that were put in place following the Macondo incident and includes requirements for safety equipment, well control systems, and blowout prevention practices on offshore oil and gas operations. The Final Rule took effect on October 22, 2012. Implementation of new BOEM or BSEE guidelines or regulations may subject us to increased costs or limit the operational capabilities of our rigs and could materially and adversely affect our operations and financial condition. Our ability to operate our drilling units in the U.S. GOM could be restricted by governmental regulation", refer to Item 3.D of this Annual Report.

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C. ORGANIZATIONAL STRUCTURE

We were incorporated on May 10, 2005, under the laws of Bermuda. We are engaged, with our subsidiaries and consolidated companies, in the ownership and operation of a diversified fleet of offshore drilling units and in the provision of well services. Our operations are split into three reporting segments – floaters (world-wide), jack-up rigs (world-wide) and tender rigs (mainly in south-east Asia and Africa).

In February 2011, Seadrill reduced its ownership in Archer from 52.3% to approximately 36.4%. As such, with effect from the end of February, 2011, Archer, which historically represented our well service segment, has no longer been fully consolidated into Seadrill's financial statements, but is instead be classified as an investment in an associated company. Seadrill currently has a 39.9% ownership stake in Archer.

On February 16, 2011, we reorganized our activities in the harsh environment segment by transferring five harsh environment drilling rigs and one contract for the construction of a semi-submersible rig to a new sub-holding company, NADL. NADL currently has a fleet of nine harsh-environment offshore drilling rigs, consisting of four semi-submersibles (including the West Hercules, which it operates on our behalf), one ultra-deepwater drillship, two jack-up rigs and contracts for the construction of two additional drilling rigs NADL currently trades on the Norwegian OTC List under the symbol "NADL."  NADL has submitted a registration statement to the Commission to register its common shares under the Securities Act of 1933, as amended, or the Securities Act.  Upon completion of the Commission's review process, NADL plans to commence the initial public offering of its common shares in the U.S. and list its common shares on the New York Stock Exchange. Concurrently with its initial public offering, NADL plans to offer to exchange the unregistered common shares previously issued in private placement offerings, excluding the common shares owned by us and other affiliates of NADL, for common shares that have been registered under the Securities Act.  We currently own 73% of NADL's outstanding shares and the balance of the shares are held by institutional and other investors.

On October 18, 2012, Seadrill Partners LLC (NYSE:SDLP), or Seadrill Partners, our then wholly owned subsidiary, launched an initial public offering in the United States of 10,062,550 common units (including the overallotment option that was granted to the underwriters and exercised), representing limited liability company interests, at $22.00 per unit.  With the proceeds of its initial public offering, Seadrill Partners acquired four drilling rigs from us, the West Capricorn, West Aquarius, West Capella and the West Vencedor. We currently own 75.7% of the outstanding limited liability company interests in Seadrill Partners.

A full list of our significant management, operating and rig-owning subsidiaries is shown in Exhibit 8.1.

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D. PROPERTY, PLANT AND EQUIPMENT

We own a substantially modern fleet of drilling units. The following table sets forth the units that we own or have contracted for delivery as of April 22, 2013:

	Year	Water depth	Drilling depth	Current location	Month of
Unit	built	(feet)	(feet)		contract expiry
Jack-up rigs
West Epsilon *	1993	400	30,000	Norway	December 2016
West Courageous	2007	350	30,000	Malaysia	February 2014
West Defender	2007	350	30,000	Brunei	May 2016
West Resolute	2007	350	30,000	Saudi Arabia / Kuwait	October 2015
West Prospero	2007	400	30,000	Vietnam	July 2013
West Intrepid	2008	350	30,000	Saudi Arabia / Kuwait	November 2013
West Vigilant	2008	350	30,000	Malaysia	October 2013
West Ariel	2008	400	30,000	Vietnam	July 2013
West Triton	2008	375	30,000	Saudi Arabia / Kuwait	August 2015
West Freedom	2009	350	30,000	Qatar	July 2013
West Cressida	2009	375	30,000	Thailand	May 2014
West Mischief	2010	350	30,000	Republic of Congo	December 2014
West Callisto	2010	400	30,000	Saudi Arabia / Kuwait	November 2015
West Leda	2010	375	30,000	Malaysia	April 2014
West Elara *	2011	450	40,000	Norway	April 2019
West Castor (NB)	2013	400	30,000	Jurong Shipyard (Singapore)
West Telesto (NB)	2013	400	30,000	Dalian Shipyard (China)
West Oberon (NB)	2013	400	30,000	Dalian Shipyard (China)
West Tucana (NB)	2013	400	30,000	Jurong Shipyard (Singapore)
West Linus (NB) *	2013	450	40,000	Jurong Shipyard (Singapore)	January 2019
West Titan (NB)	2015	350	40,000	Dalian Shipyard (China)
West Proteus (NB)	2015	350	40,000	Dalian Shipyard (China)
West Rhea (NB)	2015	350	40,000	Dalian Shipyard (China)
West Tethys (NB)	2015	350	40,000	Dalian Shipyard (China)

Tender rigs
T4	1981	410	20,000	Thailand	June 2013
T7	1983	410	20,000	Thailand	March 2013
West Pelaut	1994	6,500	30,000	Brunei	March 2015
West Menang	1999	6,500	30,000	Malaysia	September 2014
West Alliance	2001	6,500	30,000	Malaysia	January 2015
West Setia	2005	6,500	30,000	Angola	August 2014
West Berani	2006	6,500	30,000	Indonesia	January 2014
T11	2008	6,500	30,000	Thailand	May 2017
T12	2010	6,500	30,000	Thailand	April 2014
West Vencedor	2010	6,500	30,000	Angola	March 2015
West Jaya	2011	6,500	30,000	Trinidad & Tobago	September 2014
T15 (NB)	2013	6,500	30,000	In transit to Thailand	May 2018
T16 (NB)	2013	6,500	30,000	COSCO Shipyard (China)	June 2018
T17 (NB)	2013	6,000	30,000	COSCO Shipyard (China)	May 2018
West Esperanza (NB)	2013	6,500	30,000	Keppel FELS (Singapore)	December 2014
T18 (NB)	2013	6,000	30,000	COSCO Shipyard (China)	March 2019

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Semi-submersible rigs
West Alpha *	1986	2,000	23,000	Norway	July 2016
West Venture *	2000	2,600	30,000	Norway	July 2015
West Phoenix *	2008	10,000	30,000	UK	January 2015
West Hercules *(SF)	2008	10,000	35,000	Norway	January 2017
West Sirius	2008	10,000	35,000	USA	July 2019
West Taurus (SF)	2008	10,000	35,000	Brazil	February 2015
West Eminence	2009	10,000	30,000	Brazil	July 2015
West Aquarius	2009	10,000	35,000	Canada	June 2015
West Orion	2010	10,000	35,000	Brazil	July 2016
West Pegasus	2011	10,000	35,000	Mexico	August 2016
West Leo	2011	10,000	35,000	Ghana	May 2018
West Capricorn	2011	10,000	35,000	USA	August 2017
West Eclipse **	2011	10,000	40,000	Angola	December 2013
West Mira (NB)	2015	10,000	40,000	Hyundai Shipyard (South Korea)	June 2020
West Rigel (NB) *	2015	10,000	40,000	Jurong Shipyard (Singapore)

Drillships
West Navigator *	2000	7,500	35,000	Norway	June 2014
West Polaris (SF)	2008	10,000	35,000	Nigeria	February 2018
West Capella	2008	10,000	35,000	Nigeria	April 2017
West Gemini	2010	10,000	35,000	Angola	September 2017
West Auriga (NB)	2013	12,000	40,000	Samsung Heavy Industries (South Korea)	October 2020
West Vela (NB)	2013	12,000	40,000	Samsung Heavy Industries (South Korea)	January 2021
West Tellus (NB)	2013	12,000	40,000	Samsung Heavy Industries (South Korea)
West Neptune (NB)	2014	12,000	40,000	Samsung Heavy Industries (South Korea)
West Jupiter (NB)	2014	12,000	40,000	Samsung Heavy Industries (South Korea)
West Saturn (NB)	2014	12,000	40,000	Samsung Heavy Industries (South Korea)
West Carina (NB)	2014	12,000	40,000	Samsung Heavy Industries (South Korea)

SF Unit owned by subsidiary of Ship Finance (see Note 33 to Consolidated Financial Statements).

NB Newbuilding under construction or in transit to its first drilling assignment.

* Owned by our subsidiary NADL in which we own 73% of the outstanding shares.

* Owned by our subsidiary NADL in which we own 73% of the outstanding shares.

(SF) NADL operates the harsh environment semi submersible rig West Hercules on behalf of Seadrill, but the rig is owned by Ship Finance

** The acquisition of West Eclipse was completed post year end on January 3, 2013. Refer to Note 35 Subsequent events.

In addition to the drilling units listed above, as of December 31, 2012, we have buildings, plant and equipment with a net book value of $40 million, including office equipment. Our offices in Stavanger in Norway, Singapore, Houston in the United States, Rio de Janeiro in Brazil, Dubai in the United Arab Emirates and Aberdeen in the United Kingdom are leased and aggregate office operating costs were $25 million in 2012.

We do not have any material intellectual property rights.

ITEM 4A. UNRESOLVED STAFF COMMENTS

Not applicable.

ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS

Overview

The following should be read in conjunction with Item 3.A "Key Information – Selected Financial Data", Item 4 "Information on the Company" and our Consolidated Financial Statements and Notes thereto included herein.

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Fleet Development

The following table summarizes the development of our active fleet of drilling units, based on the dates when the units began operations:

				Floaters
Unit type	Jack-up rigs			Drillships		Semi- submersible rigs		Tender rigs			Total units
At December 31, 2007		7			1		2		8			18
additions in 2008		2			1		2		1			6
disposals in 2008		(1	)									(1	)
At December 31, 2008		8			2		4		9			23
additions in 2009					1		4					5
disposals in 2009		(2	)									(2	)
At December 31, 2009		6			3		8		9			26
additions in 2010		10			1		1		2			14
disposals in 2010		(1	)									(1	)
At December 31, 2010		15			4		9		11			39
additions in 2011		1					1		1			3
disposals in 2011		(1	)						(1	)		(2	)
At December 31, 2011		15			4		10		11			40
additions in 2012		1					2					3
disposals in 2012
At December 31, 2012		16			4		12		11			43

In addition to the units in the table above, our fleet list includes the following rigs under construction which are scheduled to be delivered and begin operations after December 31, 2012:

Drilling unit	Type of rig	Delivery date/Start-up date*
West Rigel	Semi-submersible rig	1Q 2015
West Mira	Semi-submersible rig	1Q 2015
West Telesto	Jack-up rig	3Q 2013
West Tucana	Jack-up rig	3Q 2013
West Castor	Jack-up rig	3Q 2013
West Oberon	Jack-up rig	4Q 2013
West Titan	Jack-up rig	1Q 2015
West Proteus	Jack-up rig	2Q 2015
West Rhea	Jack-up rig	3Q 2015
West Tethys	Jack-up rig	4Q 2015
West Linus	Jack-up rig	4Q 2013
West Auriga	Drillship	2Q 2013
West Vela	Drillship	2Q 2013
West Tellus	Drillship	3Q 2013
West Neptune	Drillship	2Q 2014
West Jupiter	Drillship	3Q 2014
West Saturn	Drillship	2Q 2014
West Carina	Drillship	4Q 2014
T-15 *	Tender rig	1Q 2013
T-16	Tender rig	2Q 2013
T-17	Tender rig	2Q 2013
West Esperanza	Tender rig	2Q 2013
T-18	Tender rig	4Q 2013

* Start-up date is used for rigs that have been delivered from the yard and are in transit to the first drilling assignment

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Factors Affecting our Results of Operations

The principal factors which have affected our results since 2005 and are expected to affect our future results of operations and financial position include:

— the number and availability of our drilling units;

— the daily rates obtainable of our drilling units;

— the daily operating expenses of our drilling units;

— utilization rates for our drilling units;

— administrative expenses;

— gains on disposals;

— gains on deconsolidation;

— interest and other financial items;

— acquisitions and divestitures of businesses and assets; and

— tax expenses.

— we are currently analyzing whether we will deconsolidate the results of Seadrill Partners following Seadrill Partners' annual meeting of unitholders expected to be held later in 2013. The deconsolidation of Seadrill Partners would effect our reported results of operations and cash flows so that they would not necessarily be comparable to our historical results.

Revenues

In general, each of our drilling units is contracted for a period of time to provide offshore drilling services at an agreed daily rate. A unit will be stacked if it has no contract in place. Daily rates can vary from approximately $50,000 per day to more than $650,000 per day, depending on the type of drilling unit and its capabilities, operating expenses, taxes and other factors. An important factor in determining the level of revenue is the technical utilization of the drilling rig. To the extent that our operations are interrupted due to equipment breakdown or operational failures, we do not generally receive daily rate compensation for the period of the interruption. Furthermore, our daily rates can be reduced in instances of interrupted or suspended service due to, among other things, repairs, upgrades, weather, maintenance, force majeure or requested suspension of services by the client and other operating factors.

The terms and conditions of the contracts allow for compensation when factors beyond our control, including weather conditions, influence the drilling operations and, in some cases, for compensation when we perform planned maintenance activities. In many of our contracts we are entitled to cost escalation to compensate for some of ourcost increases as reflected in publicly available cost indices.

In addition to contracted daily revenue, customers may pay mobilization and demobilization fees for units before and after their drilling assignments, and may also pay reimbursement of costs incurred by the Company at their request for additional supplies, personnel and other services, not covered by the contractual daily rate.

The following table summarizes our average daily revenues and economic utilization percentage by rig type for the periods under review:

	Year ended December 31,
	2012				2011				2010
	Average daily revenues		Economic utilization		Average daily revenues		Economic utilization		Average daily revenues		Economic utilization
	$			%	$			%	$			%
Jack-up rigs		153,000		86		136,000		90		160,000		90
Semi-submersible rigs		462,000		87		508,000		96		486,000		95
Drillships		542,000		96		515,000		94		508,000		89
Tender rigs		115,000		98		139,000		92		95,000		89

Note: Average daily revenues are the weighted average revenues for each type of unit, based on the actual days available for each unit of that type. Economic utilization is calculated as the total days worked divided by the total days in the period.

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Expenses

Our expenses consist primarily of rig operating expenses, reimbursable expenses, depreciation and amortization, administration expenses, interest and other financial expenses and tax expenses.

Rig operating expenses are related to the drilling units we have either in operation or stacked and include the remuneration of offshore crews and onshore rig supervision staff, as well as expenses for repairs and maintenance. Reimbursable expenses are incurred at the request of customers, and include supplies, personnel and other services. Depreciation and amortization costs are based on the historical cost of our drilling units and other equipment. Administration expenses include the costs of offices in various locations, as well as the remuneration and other compensation of the directors and employees engaged in the management and administration of the Company.

Our interest expenses depend on the overall level of debt and prevailing interest rates. However, these expenses may be reduced as a consequence of capitalization of interest expenses relating to drilling units under construction. Other financial items include income from associated companies and may reflect various mark-to-market adjustments to the value of our interest rate and forward currency swap agreements and other derivative financial instruments.

Tax expenses reflect payable and deferred taxes related to our rig owning and operating activities and may vary significantly depending on jurisdictions and contractual arrangements. In most cases the calculation of tax is based on net income or deemed income, the latter generally being a function of gross turnover.

Critical Accounting Estimates

The preparation of our Consolidated Financial Statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosures about contingent assets and liabilities. We base these estimates and assumptions on historical experience, available information and assumptions that we believe to be reasonable.  Our critical accounting estimates are important factors to our financial condition and results of operations and require us to make subjective or complex assumptions or estimates about matters that are uncertain.  Significant accounting policies are discussed in Note 2 (Accounting Policies) in the notes of our Consolidated Financial Statements appearing elsewhere in this Annual Report. We believe that the following are the critical accounting estimates used in the preparation of our Consolidated Financial Statements. In addition, there are other items within our Consolidated Financial Statements that require estimation.

Drilling Units

Rigs, vessels and equipment are recorded at historical cost less accumulated depreciation. The cost of these assets less estimated residual value is depreciated on a straight-line basis over their estimated remaining economic useful lives. The estimated economic useful life of our floaters, jack-up rigs, and tender rigs, when new, is 30 years.

Significant investments are capitalized and depreciated in accordance with the nature of the investment. Significant investments that are deemed to increase an asset's value for its remaining useful life, are capitalized and depreciated over the remaining life of the asset.

We determine the carrying value of these assets based on policies that incorporate our estimates, assumptions and judgments relative to the carrying value, remaining useful lives and residual values. The assumptions and judgments we use in determining the estimated useful lives of our drilling units reflect both historical experience and expectations regarding future operations, utilization and performance. The use of different estimates, assumptions and judgments in establishing estimated useful lives could result in materially different net book values of our drilling units and results of operations.

The useful lives of rigs and related equipment are difficult to estimate due to a variety of factors, including technological advances that impact the methods or cost of oil and gas exploration and development, changes in market or economic conditions and changes in laws or regulations affecting the drilling industry. We re-evaluate the remaining useful lives of our drilling units as and when certain events occur which directly impact our assessment of their remaining useful lives and include changes in operating condition, functional capability and market and economic factors.

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The carrying values of our long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may no longer be appropriate. We assess recoverability of the carrying value of the asset by estimating the undiscounted future net cash flows expected to result from the asset, including eventual disposition. If the undiscounted future net cash flows are less than the carrying value of the asset, an impairment loss is recorded equal to the difference between the asset's carrying value and fair value. In general, impairment analyses are based on expected costs, utilization and daily rates for the estimated remaining useful lives of the asset or group of assets being assessed. An impairment loss is recorded in the period in which it is determined that the aggregate carrying amount is not recoverable. Asset impairment evaluations are, by nature, highly subjective. They involve expectations about future cash flows generated by our assets, and reflect management's assumptions and judgments regarding future industry conditions and their effect on future utilization levels, daily rates and costs. The use of different estimates and assumptions could result in significantly different carrying values of our assets and could materially affect our results of operations.

Income Taxes

We are a Bermuda company. Currently we are not required to pay income taxes in Bermuda on ordinary income or capital gains as we qualify as an exempt company.  We have received written assurance from the Minister of Finance in Bermuda that we will be exempt from taxation until March 2035. Certain of our subsidiaries operate in other jurisdictions where income taxes are imposed. Consequently income taxes have been recorded in these jurisdictions when appropriate. Our income tax expense is based on our income, statutory tax rates and tax planning opportunities available to us in the various jurisdictions in which we operate. We provide for income taxes based on the tax laws and rates in effect in the countries in which operations are conducted and income is earned. The income tax rates and methods of computing taxable income vary substantially between jurisdictions. Our income tax expense is expected to fluctuate from year to year as our operations are conducted in different tax jurisdictions and the amount of pre-tax income fluctuates.

The determination and evaluation of our annual group income tax provision involves interpretation of tax laws in various jurisdictions in which we operate and requires significant judgment and use of estimates and assumptions regarding significant future events, such as amounts, timing and character of income, deductions and tax credits. There are certain transactions for which the ultimate tax determination is unclear due to uncertainty in the ordinary course of business. We recognize tax liabilities based on our assessment of whether our tax positions are more likely than not sustainable, based solely on the technical merits and considerations of the relevant taxing authority's widely understood administrative practices and precedence.  Changes in tax laws, regulations, agreements, treaties, foreign currency exchange restrictions or our levels of operations or profitability in each jurisdiction may impact our tax liability in any given year. While our annual tax provision is based on the information available to us at the time, a number of years may elapse before the ultimate tax liabilities in certain tax jurisdictions are determined. Current income tax expense reflects an estimate of our income tax liability for the current year, withholding taxes, changes in prior year tax estimates as tax returns are filed, or from tax audit adjustments. Our deferred tax expense or benefit represents the change in the balance of deferred tax assets or liabilities as reflected on the balance sheet. Valuation allowances are determined to reduce deferred tax assets when it is more likely than not that some portion or all of the deferred tax assets will not be realized. To determine the amount of deferred tax assets and liabilities, as well as of the valuation allowances, we must make estimates and certain assumptions regarding future taxable income, including where our drilling units are expected to be deployed, as well as other assumptions related to our future tax position. A change in such estimates and assumptions, along with any changes in tax laws, could require us to adjust the deferred tax assets, liabilities, or valuation allowances.

Contingencies

We establish reserves for estimated loss contingencies when we believe a loss is probable and the amount of the loss can be reasonably estimated. Our contingency reserves relate primarily to litigation and indemnities. Revisions to contingency reserves are reflected in income in the period in which different facts or information become known, or circumstances change, that affect our previous assumptions with respect to the likelihood or amount of loss. Reserves for contingencies are based upon our assumptions and estimates regarding the probable outcome of the matter and include our costs to defend any action. In situations where we expect insurance proceeds to offset contingent liabilities, we record a receivable for all probable recoveries until the net loss is zero. We recognize contingent gains when the contingency is resolved and the gain has been realized. Should the outcome differ from our assumptions and estimates or other events result in a material adjustment to the accrued estimated contingencies, revisions to the estimated contingency amounts would be required and would be recognized in the period when the new information becomes known.

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Goodwill

We allocate the cost of acquired businesses to the identifiable tangible and intangible assets and liabilities acquired, with any remaining amount being capitalized as goodwill. Goodwill is tested for impairment at least annually. We perform a goodwill impairment test as of December 31 for each reporting segment or a component of an operating segment that constitutes a business for which financial information is available and is regularly reviewed by management. For periods prior to 2011, we based our analysis of goodwill on a discounted cash flow model. When testing for impairment we use expected future cash flows using contract daily rates during the contract periods. For periods after expiry of the contract periods, daily rates are projected based on estimates regarding future market conditions, including zero escalation of daily rates. Estimated future cash flows are calculated based on remaining asset lives and are discounted using a weighted average cost of capital. As a consequence of the change in segment structure from 2011, the amount of goodwill has been reassigned to the reporting units affected using a relative fair value allocation approach.

We have also performed sensitivity analyses using different scenarios regarding future cash flows, remaining asset lives and discount rates showing acceptable tolerance to changes in underlying assumptions in the impairment model before changes in assumptions would result in impairment. The use of different estimates and assumptions could result in materially different carrying value of goodwill and could materially affect our results of operations.

In September 2011, the FASB issued new guidance relative to the test for goodwill impairment.  The new guidance permits an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test.  The new guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011 with early adoption permitted.  We have decided to early adopt this new guidance. For the year ended December 31, 2012, we concluded it was not necessary to perform the two step goodwill impairment test, as no reporting units were at risk of failing the goodwill impairment test based on qualitative factors.

For the years ended December 31, 2012, 2011 and 2010 no impairment expense has resulted from our annual reviews.

Defined benefit pension plans

The Company has several defined benefit plans which provide retirement, death and termination benefits. The Company's net obligation is calculated separately for each plan by estimating the amount of the future benefit that employees have earned in return for their cumulative service. Pension and post-retirement costs and obligations are actuarially determined and are affected by assumptions including expected return on plan assets, discount rates, compensation increases and employee turnover. The use of different assumptions and estimates could result in materially different carrying value pension obligations and could materially affect our results of operations.

The aggregated projected future benefit obligation is discounted to a present value, and the aggregated fair value of any plan assets is deducted. The discount rate is the market yield at the balance sheet date on government bonds in the relevant currency and based on terms consistent with the post-employment benefit obligations. The retirement benefits are generally a function of number of years of employment and amount of employees remuneration. The plans are primarily funded through payments to insurance companies. The Company records its pension costs in the period during which the services are rendered by the employees. Actuarial gains and losses are recognized in the statement of operations when the net cumulative unrecognized actuarial gains or losses for each individual plan at the end of the previous reporting year exceed 10% of the higher of the present value of the defined benefit obligation and the fair value of plan assets at that date. These gains and losses are recognized over the expected remaining working lives of the employees participating in the plans. Otherwise, recognition of actuarial gains and losses is included in other comprehensive income.  Those amounts will be subsequently recognized as a component of net periodic pension cost on the same basis as the amounts recognized in accumulated other comprehensive income.

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Impairment of marketable securities and equity method investees

We analyze our available-for-sale securities and equity method investees for impairment during each reporting period to evaluate whether an event or change in circumstances has occurred in that period which may have a significant adverse effect on the carrying value of the investment. We record an impairment charge for other-than-temporary declines in fair value when the fair value is not anticipated to recover above the carrying value within a reasonable period after the measurement date, unless there are mitigating factors that indicate impairment may not be required. If an impairment charge is recorded, subsequent recoveries in fair value are not reflected in earnings until the sale of the securities held as available for sale or until the equity method investee is sold. The evaluation of whether a decline in fair value is other-than-temporary requires a high degree of judgment and the use of different assumptions could materially affect our earnings.

Convertible debt

Our convertible bond loans are comprised of a loan component, or host contract, and an option component to convert the loan to shares, or embedded derivative. If certain criteria are met, the embedded derivative must be accounted for separately from its host contract. The value of the embedded derivative is based on the implied valuation of the loan and option components reflected in the initial pricing of the bond at issuance. Financial models that use observable and/or implied market pricing are applied to estimate these values. However, judgment is exercised in formulating the assumptions used in such valuation models.

Recent accounting pronouncements

Recently Issued Accounting Standards effective 2013

Effective January 1, 2013, we will adopt the accounting standards update that expands the disclosure requirements for the offsetting of assets and liabilities related to certain financial instruments and derivative instruments.  The update requires disclosures to present both gross information and net information for financial instruments and derivative instruments that are eligible for net presentation due to a right of offset, an enforceable master netting arrangement or similar agreement.  The update is effective for interim and annual periods beginning on or after January 1, 2013.  We do not expect that our adoption will have a material effect on our consolidated balance sheet.

Effective January 1, 2013, we will adopt the accounting standards update that requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. generally accepted accounting principles (GAAP) to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. For public entities, the amendments are effective prospectively for reporting periods beginning after December 15, 2012. We do not expect that our adoption will have a material effect on our financial statements.

Inflation

Most of our contracts for drilling and well services include escalation clauses for rates to be adjusted annually in line with inflation. Accordingly, we do not consider inflation to be a significant risk to our profitability in the current and foreseeable economic environment, although it will have a moderate effect on operating and administration costs.

A. RESULTS OF OPERATIONS

We provide drilling and related services to the offshore oil and gas industry. The split of our organization into segments has historically been based on differences in management structure and reporting, economic characteristics, customer base, asset class and contract structure.

We have significantly expanded our fleet of drilling rigs in 2012, 2011 and 2010 through acquisitions of new rigs and newbuilding orders. In response to this development and the deconsolidation of Archer, management has reviewed our internal reporting structure including the operating and reporting business segments. This review has resulted in a change in our reporting segments reflecting how the Board and our directors assess performance and allocates resources. This change had effect from January 1, 2011, but the segments have also been retrospectively recasted for purposes of providing comparative data.

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We currently operate in the following three segments:

Floaters: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to semi-submersible rigs and drillships for harsh and benign environments in mid-, deep- and ultra-deep waters.

Jack-up rigs: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to jack-up rigs for operations in harsh and benign environment.

Tender rigs: We offer services encompassing drilling, completion and maintenance of offshore production wells in Southeast Asia, West Africa and the Americas. The drilling contracts relate to self-erecting tender rigs and semi-submersible tender rigs.

Segment results are evaluated on the basis of operating profit, and the information given below is based on the internal reporting structure used in the reporting to the Executive Management and the Board of Directors. The accounting principles for the segments are the same as for the Company's Consolidated Financial Statements.

Fiscal Year Ended December 31, 2012, compared to Fiscal Year Ended December 31, 2011.

The following table sets forth our operating results for 2012 and 2011.

	Year ended December 31, 2012														Year ended December 31, 2011
In US$ millions	Floaters			Jack- up rigs			Tender Rigs			Well Services*		Total			Floaters			Jack- up rigs			Tender Rigs			Well Services*			Total
Total operating revenues		2,859			861			758			-		4,478			2,694			776			589			133			4,192
Gain on sale of assets					-								-						22									22
Total operating expenses		(1,609	)		(637	)		(441	)		-		(2,687	)		(1,366	)		(578	)		(368	)		(128	)		(2,440	)
Operating income		1,250			224			317			-		1,791			1,328			220			221			5			1,774
Interest expense													(340	)														(295	)
Other financial items													(14	)														192
Income before taxes													1,437															1,671
Income taxes													(232	)														(189	)
Net income													1,205															1,482

* The Well Services segment was related to Archer which was deconsolidated from our financial statements in February 2011 and therefore discontinued as a segment.

Total operating revenues

In US $millions	2012		2011		Change
Floaters		2,859		2,694		6	%
Jack-up rigs		861		776		11	%
Tender Rigs		758		589		29	%
Well services		-		133		(100)	%
Total operating revenues		4,478		4,192		7	%

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Total operating revenues increased from $4.2 billion in 2011 to $4.4 billion in 2012. Total operating revenues are predominantly contract revenues with additional, relatively small amounts of reimbursable and other revenues. There was an increase in all segments due to an increase of rigs in operation compared to 2011. This is offset by the deconsolidation of Archer and the well services segment in February 2011.

Total operating revenues in the floaters segment increased by $165 million in 2012 compared to 2011. The number of drilling units in the floaters segment increased from 14 at December 31, 2011 to 16 at December 31, 2012. There was no significant change in the general level of daily rates during this period.

Total operating revenues in the jack-up rigs segment increased by $85 million in 2012 compared to 2011. This is primarily related to West Elara commencing operations in the first quarter of 2012.

Total operating revenues in the tender rig segment increased by $169 million in 2012 compared to 2011. The increase was mainly related to West Vencedor, T-12 and West Jaya contributing revenues for the full year in 2012, as opposed to a partial contribution in 2011, and also higher daily rates achieved on some of the other units.

Total operating revenues in the well services segment decreased from $133 million in 2011 to $0 million in 2012. This was due to the deconsolidation of Archer from our financial statements in February 2011.

Gain on sale of assets

In 2012 we did not record any gains on sale of assets. We recorded a gain of $22 million on the sale of the jack-up rig West Juno in 2011.

Total operating expenses

In US$ millions	2012		2011		Change
Floaters		1,609		1,366		18	%
Jack-up rigs		637		578		10	%
Tender rigs		441		368		20	%
Well services		-		128		(100	%)
Total operating expenses		2,687		2,440		10	%

Total operating expenses increased to $2,687 million in 2012, from $2,440 in 2011. Total operating expenses consist of rig operating expenses, depreciation and amortization, reimbursable expenses and general and administrative expenses. Total general and administrative expenses increased from $202 million in 2011 to $250 million in 2012. Reimbursable expenses in each segment were closely in line with reimbursable revenues.

Total operating expenses for the floaters operating segment increased by $243 million in 2012 compared to 2011. This is mainly related to the increase in the number of rigs in operation and downtime on a number of rigs due to technical issues and several rig transfers.

Total operating expenses for the jack-up rigs operating segment increased by $59 million in 2012 compared to 2011. This is mainly related to the increase in the number of rigs in operation. The 2011 operating expenses also included termination fees of $16 million relating to a third party management agreement for two jack-up rigs in the Middle East. There were no corresponding termination fees paid in 2012.

Total operating expenses in the tender rig segment increased by $73 million in 2012 compared to 2011. The increased costs were mainly a result of more rigs in operation.

Total operating expenses in the well services segment decreased from $128 million in 2011 to $0 million in 2012. This is due to the deconsolidation of Archer from our financial statements in February 2011.

Interest expense

Interest expense increased from $295 million in 2011 to $340 million in 2012. The increase was mainly due to an increase in long term borrowing during the period.

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Other financial items

Other financial items reported in the income statement include the following items:

In US$ millions	2012		2011
Interest income	25		21
Share in results of associated companies	(220	)	(420	)
Impairment loss on marketable securities	-		(10	)
Gain/(loss) on derivative financial instruments	3		(346	)
Gain on decline in ownership interest	169		-
Foreign exchange (loss)	(70	)	(18	)
Gain on loss of control in subsidiary	-		540
Gain on realization of marketable securities	85		416
Other financial items	(6	)	9
Total other financial items	(14	)	192

Share in results from associated companies increased from a loss of $420 million in 2011 to a loss of $220 million in 2012. We recorded an impairment charge on our Archer position of $221 million during 2012 compared to the impairment charge on our Archer position of $463 million recognized in 2011.

Included in the results for 2012 is a gain on decline in ownership interest of $169 which was recorded as a consequence of the merger of SapuraCrest and Kencana Petroleum in 2012. We also recorded a gain on realization of marketable securities of $85 million related to the sale of our SapuraKencana shares in 2012.

Included in the results for 2011 is a gain on realization of our holdings in Pride (which merged with and into Ensco with Ensco as the surviving corporation) recognized in the second quarter of 2011, which amounted to $416 million.

In 2012, we recognized gains from derivative financial instruments of $3 million compared to a loss of $346 million in 2011. The movement from 2011 to 2012 is mainly related to decreased losses on interest rate swap agreements and also a recognized gain on sale of our Ensco position of $63 million in 2012.

Foreign exchange loss amounted to $70 million and $18 million for the year ended December 31, 2012 and 2011, respectively.

Income taxes

Income taxes amounted to a net cost of $232 million for the year ended December 31, 2012 compared to a net cost of $189 million in the year ended December 31, 2011. The tax expense in 2012 includes a $91 million provision for uncertain tax positions. Our effective tax rate was approximately 16% in 2012 as compared to 11% in 2011. The increase in the effective tax rate is principally due to the increased provision for uncertain tax positions related to prior periods.

Significant amounts of our income and costs are reported in nontaxable jurisdictions such as Bermuda. The drilling rig operations are normally carried out in taxable jurisdictions. In the tax jurisdictions where we operate, the corporate tax rate ranges from 16% to 35% for earned income and the deemed tax rates vary from 5% to 10% of revenues. Further, losses in one tax jurisdiction may not be offset against taxable income in other jurisdictions. Accordingly, our effective tax rate may differ significantly from period to period depending on the level of activity in and mix of each of tax jurisdictions in which our operations are conducted.

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Fiscal Year Ended December 31, 2011, compared to Fiscal Year Ended December 31, 2010.

The following table sets forth our operating results for 2011 and 2010.

	Year ended December 31, 2011															Year ended December 31, 2010
In US$ millions	Floaters			Jack-up rigs			Tender Rigs			Well Services			Total			Floaters			Jack-up rigs			Tender Rigs			Well Services			Total
Total operating revenues		2,694			776			589			133			4,192			2,264			578			482			717			4,041
Gain on sale of assets					22									22						26									26
Total operating expenses		(1,366	)		(578	)		(368	)		(128	)		(2,440	)		(1,124	)		(405	)		(260	)		(653	)		(2,442	)
Operating income		1,328			220			221			5			1,774			1,140			199			222			64			1,625
Interest expense														(295	)														(312	)
Other financial items														192															18
Income before taxes														1,671															1,331
Income taxes														(189	)														(159	)
Net income														1,482															1,172

Total operating revenues

In US $millions	2011		2010		Change
Floaters		2,694		2,264		19	%
Jack-up rigs		776		578		34	%
Tender Rigs		589		482		22	%
Well services		133		717		(81	) %
Total operating revenues		4,192		4,041		4	%

Total operating revenues increased from $4.0 billion in 2010 to $4.2 billion in 2011. Total operating revenues are predominantly contract revenues with additional, relatively small amounts of reimbursable and other revenues. There was an increase in all segments due to more rigs in operation than in the prior year period, offset by the deconsolidation of Archer and the well services segment in February 2011.

Total operating revenues in the floaters segment increased by $430 million in 2011 compared to 2010. The number of drilling units in the floaters segment increased from 13 at December 31, 2010 to 14 at December 31, 2011. There was no significant change in the general level of daily rates during this period.

Total operating revenues in the jack-up rigs segment increased by $198 million in 2011 compared to 2010. This is partly related to the jack-up rig West Juno commencing operations in the first quarter of 2011.  The same rig was sold in 2011. In addition to this the seven jack-up rigs acquired through the Scorpion acquisition in May 2010 contributed to revenues for the full year in 2011. There was no significant change in the general level of daily rates during this period.

Total operating revenues in the tender rig segment increased by $107 million in 2011 compared to 2010. The increase was mainly related to the two new units, the West Vencedor and the T12, being delivered and starting operations during 2010. In addition, the West Jaya commenced operation during the fourth quarter of 2011. Daily rates for our tender rigs have remained fairly constant during this period.

Total operating revenues in the well services segment decreased from $717 million in 2010 to $133 million in 2011. This is due to the fact that Archer was deconsolidated from our accounts in February 2011 and the revenue in 2011 represents only two months of operations as compared to twelve months of operations in 2010.

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Gain on sale of assets

We recorded a gain of $22 million on the disposal of the jack-up rig West Juno in 2011 as compared to a gain of $26 million on the disposal of the jack-up rig West Larissa in 2010.

Total operating expenses

In US$ millions	2011		2010		Change
Floaters		1,366		1,124		22	%
Jack-up rigs		578		405		43	%
Tender rigs		368		260		42	%
Well services		128		653		(80)	%
Total operating expenses		2,440		2,442		0	%

Total operating expenses amounted to $2,440 million in 2011, which is unchanged from 2010. Total operating expenses consist of rig operating expenses, depreciation, reimbursable expenses and general and administrative expenses. Total general and administrative expenses increased from $178 million in 2010 to $202 million in 2011. Reimbursable expenses in each segment were closely in line with reimbursable revenues.

Total operating expenses for the floaters operating segment increased by $242 million in 2011 compared to 2010. This is mainly related to the increase in the number of rigs in operation.

Total operating expenses for the jack-up rigs operating segment increased by $173 million in 2011 compared to 2010. This is mainly related to the increase in the number of rigs in operation and also a non-recurring expense of $16 million related to termination of a third party management agreement for two jack-up rigs in the Middle East that was recognized in 2011.

Total operating expenses in the tender rig segment increased from $260 million in 2010 to $368 million in 2011. The increased costs were mainly a result of more rigs in operation.

Total operating expenses in the well services segment decreased from $653 million in 2010 to $128 million in 2011. This is due to the fact that Archer was deconsolidated from our accounts in February 2011 and the amount of $128 million represents only two months of operations as compared to twelve months of operations in 2010.

Interest expense

Interest expense decreased from $312 million in 2010 to $295 million in 2011. The main reason for this is the deconsolidation of Archer from February 2011. There has not been a significant change in the general interest rates during the period.

Other financial items

Other financial items reported in the income statement include the following items:

In US$ millions	2011		2010
Interest income	21		42
Share in results of associated companies	(420	)	48
Impairment loss on marketable securities	(10	)	(15	)
(Loss)/gain on derivative financial instruments	(346	)	(92	)
Gain on re-measurement of previously held equity interest	-		111
Gain on bargain purchase	-		56
Loss on debt extinguishment	-		(145	)
Foreign exchange (loss)/gain	(18	)	(26	)
Gain on loss of control in subsidiary	540		-
Gain on realization of marketable securities	416		-
Other financial items	9		39
Total other financial items	192		18

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Interest income decreased from $42 million in 2011 to $21 million in 2011. The decrease is mainly related to lower holdings of interest bearing securities in 2011.

Share in results from associated companies decreased from a gain of $48 million in 2010 to a loss of $420 million in 2011. This is mainly related to an impairment charge on our Archer position of $463 million recognized in the fourth quarter of 2011. However we recognized a gain of $540 million in 2011 related to the deconsolidation of Archer in the first quarter of 2011.

Included in the results for 2011 is a gain on realization of our holdings in Pride (which merged with and into Ensco with Ensco as the surviving corporation) recognized in the second quarter of 2011, which amounted to $416 million.

In 2011, we recognized losses from derivative financial instruments of $346 million compared to a loss of $92 million in 2010. The increase in loss is mainly related to losses of $314 million from the interest rate swap agreements and the forward exchange contracts in 2011 compared to a loss of $150 million in the previous year. In addition, we recognized a loss of $50 million related to our Ensco positions held through forward contracts in 2011.

Included for the results for 2010 is a gain of $111 million recognized relating to re-measurement of previously held equity interest and $56 million gain on bargain purchase, both related to the acquisition and consolidation of Scorpion. Please see note 25 to our Consolidated Financial Statements for the year ended December 31, 2011 included herein.

Foreign exchange loss amounted to $18 million and $26 million for the year ended December 31, 2011 and 2010, respectively.

Other financial items amounted to a gain of $9 million in 2011, which is a decrease of $30 million compared to 2010. This is mainly due to a recognized gain of $43 million due to partial redemption of the Petromena bonds in 2010.

Income taxes

Income taxes amounted to a net cost of $189 million for the year ended December 31, 2011 compared to a net cost of $159 million in the year ended December 31, 2010. The tax expense in 2011 includes a $9 million provision for uncertain tax positions related to the move of legal entities to a new tax jurisdiction. In addition, we have recognized a provision for payable tax of $39 million in the balance sheet, which will be amortized over approximately 15 years.  This provision is related to the same move of legal entities to a new tax jurisdiction.  Our effective tax rate was approximately 11% in 2011 as compared to 12% in 2010. The decreased effective tax rate is principally due to a lower proportion of our income being generated in taxable versus non taxable jurisdictions or in taxable jurisdictions with lower tax rates.

Significant amounts of our income and costs are reported in nontaxable jurisdictions such as Bermuda. The drilling rig operations are normally carried out in taxable jurisdictions. In the tax jurisdictions where we operate, the corporate tax rate ranges from 16% to 35% for earned income and the deemed tax rates vary from 5% to 10% of revenues. Further, losses in one tax jurisdiction may not be offset against taxable income in other jurisdictions. Accordingly, our effective tax rate may differ significantly from period to period depending on the level of activity in and mix of each of tax jurisdictions in which our operations are conducted.

B. LIQUIDITY AND CAPITAL RESOURCES

We operate in a capital intensive industry. Our investment in newbuildings, secondhand drilling units and our acquisition of other companies have been financed through a combination of equity issuances, bond and convertible bond offerings, and borrowings from commercial banks. Our liquidity requirements relate to servicing our debt, funding investment in drilling units, funding working capital requirements, funding dividend payments and maintaining adequate cash reserves to mitigate the effects of fluctuations in operating cash flows. Most of our contract and other revenues are received monthly in arrears, and most of our operating costs are paid on a monthly basis.

Our funding and treasury activities are conducted within corporate policies to maximize returns while maintaining appropriate liquidity for our operating requirements. Cash and cash equivalents are held mainly in U.S. dollars, Norwegian Kroner, Brazilian Real, Australian dollars, Euros, Singapore dollars and Pound Sterling.

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Our short-term liquidity requirements relate to servicing our debt and funding working capital requirements. Sources of liquidity include cash balances, restricted cash balances, short-term investments, amounts available under revolving credit facilities and contract and other revenues. We believe that contract and other revenues will generate sufficient cash flow to fund our anticipated debt service and working capital requirements for the short and medium term.

Our long-term liquidity requirements include funding the equity portion of investments in new drilling units, and repayment of long-term debt balances including those relating to the borrowings of the Company and its consolidated subsidiaries discussed below.

On December 31, 2012, we had remaining contractual commitments relating to 19 newbuilding contracts totaling approximately $5.6 billion.

As of December 31, 2012, we had cash and cash equivalents totaling $502 million, as compared to $715 million for the same period in 2011, including $184 million of restricted cash, as compared to $232 million for the same period in 2011.  In the year ended December 31, 2012, we generated cash from operations of $1.6 billion, used $1.4 billion in investing activities, and cash outflows from financing activities were $0.4 billion; as compared to $1.7 billion, $2.5 billion, and $0.5 billion, respectively, in the same period in 2011.

For the year ended December 31, 2012 we paid cash dividends of $4.31 per common share, or a total of $1.9 billion, while for the same period in 2011 we paid $1.4 billion in total cash dividends.

We have entered into a significant number of construction contracts for newbuilds. Borrowings under our current credit facilities and available cash on hand are not sufficient to pay the remaining installments related to our contracted yard commitments for all of our newbuilding drilling units, which currently totals $6.5 billion (including $0.02 billion paid in yard installments since December 31, 2012).  As of April 22, 2013 we have secured financing of approximately $3.3 billion for our newbuild program (including the AOD drilling units) to be delivered in 2013 with a combination of facilities with commercial lenders and an unsecured bond.  For our deliveries scheduled to take place in 2014 and 2015, we are exploring a number of financing opportunities for the remaining amounts not yet financed and believe that we will be able to secure the amounts required at affordable terms and rates due to our past experience and successes as well as current discussions with various potential counterparties in raising such funds.   We believe the cash that we generate from our operations supported by existing and future debt capacity, provided by our contract backlog, current and future asset base, is expected to be sufficient to meet our existing commitments to fund new buildings including meeting our working capital needs, as well as permit us to pay dividends to our stockholders and service our debt obligations in accordance with the existing maturity profile.  If we enter into significant further investments and/or newbuilding commitments we expect that we will require additional issuances of equity and/or new debt to meet our capital requirements.   See Item 8. "Financial Information – Dividend Policy." A deterioration in our operating performance, inability to obtain cost efficiencies, lack of success in adding new contracts to our backlog, failure to complete our remaining newbuilding program on time and within budget, finance our commitments as well as numerous other factors detailed above in "Risk Factors" could limit our ability to further the growth of our business, to meet working capital requirements, and to pay dividends.

We plan to pay our debt as it becomes due, although our leverage ratio will largely be dependent upon our contract backlog, the level of our regular cash dividends and financial outlook. Any decision to refinance debt maturing in future years will take the above factors into consideration, and we believe it is likely that we will refinance a portion of our debt.

Seadrill Limited, as the parent company of its operating subsidiaries, is not a party to any drilling contracts directly and is therefore dependent on receiving cash distributions from its subsidiaries and other investments to meet its payment obligations. Cash dividend payments are regularly transferred by the various subsidiaries. Surplus cash held in subsidiaries is transferred to Seadrill Limited by intercompany loans and/or dividend payments.

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Borrowings

As of December 31, 2012, we had total outstanding borrowings under our credit facilities of $10.8 billion at an average annual interest rate of approximately 3.53%. In addition, we had interest bearing debt of $1,054 million under loan agreements with related parties.

Set forth below is a summary of our outstanding indebtedness as of December 31, 2012.

	Outstanding at December 31, 2012 (In millions of U.S. dollars)
Secured credit facilities
- $800 million secured term loan facility due 2013		227
- $2,000 million secured credit facility due 2017		1,750
- $100 million secured term loan facility due 2014		69
- $1,500 million senior secured credit facility due 2014		882
- $1,200 million senior secured credit facility due 2015		867
- $700 million senior secured credit facility due 2015		560
- $550 million senior secured credit facility due 2016		495
- $1,121 million senior secured credit facility due 2017		1,019
- $170 million senior secured credit facility due 2013		83
- $400 million senior secured credit facility due 2016		360
- $440 million secured credit facility due 2017		101
- $900 million secured credit facility due 2017		731
Ship Finance secured credit facilities
- $700 million secured term loan facility due 2013 (VIE)		397
- $1,400 million secured term loan facility due 2013 (VIE)		822
Unsecured bonds
- $350 million unsecured bond due 2015		342
- $1,000 million senior unsecured bond due 2017		1,000
- NOK1,250 million senior unsecured bond due 2014		225 (NOK 1,250 million)
Convertible bonds
- $650 million 3.375% unsecured convertible bonds due 2017		561
CIRR loans
- NOK1,754 million Commercial Interest Reference Rate, or CIRR credit facilities due 2016		149 (NOK825 million)
- NOK1,011 million CIRR credit facilities due 2020		121 (NOK674 million)

Credit facilities

$1,500 million secured credit facility

In June 2009, the Company entered into a $1,500 million senior secured loan facility with a syndicate of banks and export credit facility agents, to partly fund the acquisition of the jack-up rigs West Capella, West Sirius, West Ariel and West Aquarius, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,733 million. The facility bears interest at LIBOR plus 3.25% per annum and is repayable over a term of five years. The outstanding balance at December 31, 2012 was $882 million, as compared to $1,059 million in 2011. At maturity a balloon payment of $662 million is due. We do not have any undrawn capacity on this facility at year end.

$800 million secured term loan

In August 2005, the Company entered into a $300 million secured term loan facility with a syndicate of banks to partly fund the acquisition of two semi-submersible rigs, West Eminence and West Phoenix, which have been pledged as security. The facility was amended and increased in 2006 to $800 million. The facility was amended again in 2011 due to West Phoenix was moved to North Atlantic. As a result of this, only West Eminence was pledged as security as per December 31, 2012. The net book value at December 31, 2012 of the unit pledged as security is $631 million. The facility consists of two tranches, and bears interest at LIBOR plus 1.70% and 3.5% per annum. As of December 31, 2012, the outstanding balance was $227 million, as compared to $272 million in 2011. The final repayment of $183 million is due in 2013. We do not have any undrawn capacity on this facility at year end.

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$100 million secured term loan

In April 2008, the Company entered into a $100 million secured term loan facility with two banks to partly fund the acquisition of the tender rig T-11, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $79 million. The facility bears interest at a fixed rate of 3.03% per annum and is repayable over a term of six years. As of December 31, 2012, the outstanding amount on this facility was $69 million, as compared to $74 million in 2011. At maturity a balloon payment of $60 million is due. We do not have any undrawn capacity on this facility at year end.

$700 million secured term loan

In October 2010, the Company entered into a $700 million secured loan facility with a syndicate of banks to partly fund the acquisition of seven jack-up drilling rigs, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,126 million. The facility bears interest at LIBOR plus 2.50% per annum and is repayable over a term of five years. As of December 31, 2012, the outstanding balance was $560 million, as compared to $630 million in 2011. At maturity a balloon payment of $350 million is due in October 2015. We do not have any undrawn capacity on this facility at year end.

$1,200 million secured term loan

In June 2010, the Company entered into a $1,200 million secured facility with a group of various commercial lending institutions and export credit agencies. The loan is secured by first priority mortgages on one ultra-deepwater semi-submersible drilling rig (West Orion), one ultra-deepwater drillship (West Gemini) and one tender rig (West Vencedor). The net book value at December 31, 2012 of the units pledged as security is $1,477 million. The facility bears interest at LIBOR plus 2.25% per annum and is repayable over a term of five years. The outstanding balance as of December 31, 2012, was $867 million, as compared to $1,000 million in 2011. At maturity a balloon payment of $567 million is due. We do not have any undrawn capacity on this facility at year end. We have subsequent to the balance sheet date entered into a renewal of the fixed margin period on this facility commencing on June 25, 2013, with final maturity in 2015.

$900 million secured term loan

In July 2012, the Company refinanced $585 million loan and entered into new $900 million senior secured credit facility with a group of commercial lending institutions, comprised of a term loan in the amount of $375 million, a term loan in the amount of $150 million, and a revolving facility in the amount of $375 million. This facility has a five year term, and is repayable in quarterly installments of $18.8 million for the first three installments, followed by quarterly installments of $22.5 million thereafter, with a balloon payment of $484 million due at maturity. The facility bears interest at LIBOR plus a margin. The tender rigs West Alliance, West Berani, West Menang, West Pelaut, West Setia, West Jaya, West Esperanza and T-12 are pledged as security. The $585 million facility, which had $312 million outstanding, was repaid with a portion of this facility.  As of December 31, 2012, the outstanding balance of this facility was $731 million.

$440 million secured term loan

In December 2012, the Company entered into a $440 million secured term loan facility with a syndicate of banks to fund the delivery of two tender rigs and two jack-up drilling rigs currently under construction. As of December 31, 2012 we have drawn $101 million on the facility and T-15 has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $112 million. The facility bears interest at LIBOR plus 3.25% per annum and is repayable over a term of five years. The undrawn amount will be available at delivery of the rigs under construction. At maturity a balloon payment of $223 million is due. The outstanding balance as at December 31, 2012 was $100.5 million. We do not have any undrawn capacity on this facility at year end.

$1,121 million secured credit facility

In January 2011, the Company entered into a $1,121 million secured credit facility with Lloyds TSB to fund the acquisition of two ultra-deepwater semi-submersible rigs, West Leo and West Pegasus, which has been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,248 million. In 2012 we have further drawn down on this facility for general corporate purposes. The facility bears interest at LIBOR plus a margin and is repayable over a term of seven years. The facility was fully drawn as of December 31, 2012 with a balance of $1,019 million, as compared to $985 million in 2011. At maturity a balloon payment of $498 million is due. We do not have any undrawn capacity on this facility at year end.

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$2,000 million secured credit facility

In April 2011, our subsidiary North Atlantic Drilling Ltd entered into a $2,000 million secured credit facility with a syndicate of banks to partly fund the acquisition of six drilling units from Seadrill Ltd, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $2,417 million. The facility has a six year term and bears interest at LIBOR plus 2.00% per annum. As of December 31, 2012, the outstanding balance was $1,750 million, as compared to $1.9 billion in 2011. At maturity a balloon payment of $1,000 million is due. We do not have any undrawn capacity on this facility at year end.

$170 million secured loan facility

In February 2007, the Company entered into a sale and leaseback agreement for the jack-up rig West Prospero with Rig Finance II Ltd, at that time a subsidiary of Ship Finance Limited. In February 2007 Rig Finance II Ltd entered into a $170 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Prospero, which has been pledged as security. In June 2011, the Company acquired all the shares of Rig Finance II Limited. The net book value at December 31, 2012 of the unit pledged as security is $176 million. The facility bears interest at LIBOR plus 0.90 % to 1.20% per annum depending on the ratio of market value to loan, and is repayable over a term of six years. As of December 31, 2012, the outstanding balance was $83 million, as compared to $92 million in 2011. At maturity a balloon payment of $79 million is due. We do not have any undrawn capacity on this facility at year end.

$550 million secured credit facility

In December 2011, the Company entered into a $550 million secured credit facility with a syndicate of banks to partly fund the delivery of the ultra-deepwater semi-submersible drilling unit West Capricorn, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $712 million. The facility has a five year tenor and bears interest at LIBOR plus a margin. As of December 31, 2012, the outstanding balance was $495 million, as compared to $550 million in 2011. At maturity a balloon payment of $275 million is due. We do not have any undrawn capacity on this facility at year end.

$400 million secured credit facility

In December 2011, the Company entered into a $400 million secured credit facility with a syndicate of banks. The Jack-Up rigs West Cressida, West Callisto, West Leda and West Triton has been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $727 million. The facility has a five year term and bears interest of LIBOR plus 2.50% per annum. As of December 31, 2012, the outstanding balance was $360 million, as compared to $400 million in 2011. At maturity a balloon payment of $200 million is due. We do not have any undrawn capacity on this facility at year end.

Ship Finance International Loans

In May 2008, the Company entered into a sale and leaseback agreement for the drillship West Polaris with SFL West Polaris Limited, a subsidiary of Ship Finance. SFL West Polaris Limited is consolidated as a VIE by the Company. In July 2008 SFL West Polaris Limited entered into a $700 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Polaris, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $594 million. The facility bears interest at LIBOR plus 1.25% per annum and is repayable over a term of five years. At December 31, 2012, the outstanding balance under the facility was $397 million, as compared to $470 million in 2011.

In September 2008, the Company entered into a sale and leaseback agreement for the two semi-submersible rigs West Taurus and West Hercules with SFL Deepwater Ltd, a subsidiary of Ship Finance. SFL Deepwater Ltd is consolidated as a VIE by the Company. In September 2008, SFL Deepwater Ltd entered into a $1,400 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Taurus and West Hercules, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,035 million. The facility bears interest at LIBOR plus 1.40% per annum and is repayable over a term of five years. As of December 31, 2012, the outstanding balance under the facility was $822 million, as compared to $939 million in 2011.

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$585 million secured term loan

In December 2006, we entered into a $585 million secured term loan facility with a syndicate of banks to partly fund the acquisition of eight tender rigs, which have been pledged as security. The facility bears interest at LIBOR plus a margin. This facility was fully repaid and refinanced in July 2012, and therefore the balance outstanding as at December 31, 2012 was nil (2011: $337 million).

Bonds and convertible bonds

$350 million fixed interest rate bond

In October 2010, the Company raised $350 million through the issue of a five year bond which matures in October 2015. Interest on the bonds bears a fixed interest of 6.50% per annum, payable semi-annually in arrears. In May 2012, we repurchased $8 million of the bonds.  As of December 31, 2012, the outstanding balance was $342 million, as compared to $350 million in 2011.

NOK1,250 million floating interest rate bond

In January 2012, the Company raised $225 million (NOK1,250 million) through the issue of an unsecured two year bond, with maturity date of February 13, 2014. The bond bears interest of NIBOR plus 3.25% per annum, payable quarterly in arrears. The bond is listed on the Oslo Stock Exchange.

$1,000 million fixed interest bond

In September 2012, the Company's raised $1,000 million through the issue of a five year bond which matures in September 2017. Interest on the bonds bears a fixed interest of 5.625% per annum, payable semi-annually in arrears.

3.375% Convertible Bonds due 2017

In October 2010, the Company issued at par $650 million of convertible bonds. Interest on the bonds is fixed at 3.375%, payable semi-annually in arrears. The bonds are convertible into Seadrill Limited common shares at any time up to ten banking days prior to October 27, 2017. The conversion price at the time of issuance was $38.92 per share, representing a 30% premium to the share price at the time. Since then, dividend distributions have reduced the conversion price to $31.14. For accounting purposes $121 million was, at the time of issuance of the bonds, allocated to the bond equity component and $529 million to the bond liability component. This is due to the cash settlement option stipulated in the bond agreement. Unless previously redeemed, converted or purchased and cancelled, the bonds mature in October 2017. The convertible bonds are tradable, and their market price as of March 13, 2013 was 135% of nominal value. If the bonds were converted into shares at the current conversion price of $31.1364, a further 20,875,888 new shares would be issued. The bond contains covenants, the principle one requiring the Company to maintain a market adjusted equity ratio of at least 30.0%.

NOK 500 million floating interest rate bonds

In September 2005, we raised NOK500 million through the issuance of a seven year bond. The bond bears quarterly interest at the Norwegian Inter-Bank Offer Rate, or NIBOR, plus a margin. We later repurchased NOK391.5 million of the bonds. The bond was repaid upon final maturity in September 2012, therefore the balance outstanding as at December 31, 2012 was nil (2011: $75 million).

Commercial Interest Reference Rate (CIRR) Credit Facilities

In April 2008, the Company entered into a CIRR term loan for NOK850 million with Eksportfinans ASA, the Norwegian export credit agency. The loan bears fixed interest at 4.56% per annum and is repayable over a term of eight years. The outstanding balance at December 31, 2012 was $72 million (NOK400 million), $83 million, in 2011.

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In June 2008, the Company entered into a CIRR term loan for NOK904 million with Eksportfinans ASA. The loan bears fixed interest at 4.15% per annum and is repayable over a term of eight years. The outstanding balance at December 31, 2012 was $77 million (NOK425 million), $89 million, in 2011.

In July 2008, the Company entered into a CIRR term loan for NOK1,011 million with Eksportfinans ASA. The loan bears fixed interest at 4.15% per annum and is repayable over a term of twelve years. The outstanding balance at December 31, 2012 was $121 million (NOK674 million), $126 million, in 2011

In connection with the above three CIRR fixed interest term loans totaling $270 million (NOK1,499 million), fixed interest cash deposits equal to the total outstanding loan balances have been established with commercial banks. The collateral cash deposits are reduced in parallel with repayments of the CIRR loans and receive fixed interest at the same rates as those paid on the CIRR loans. The collateral cash deposits are classified as "restricted cash" in the balance sheet, and the effect of these arrangements is that the CIRR loans have no effect on net interest bearing debt.

In the year ended December 31, 2012, we repaid in full:

— a $585 million secured term loan facility (of which $337 million was outstanding at December 31, 2011); and

— a NOK500 million unsecured seven year bond (of which NOK450 million ($75 million) was outstanding at December 31, 2011).

Related party loan agreements

On March 31, 2012, we obtained a short-term unsecured credit facility of $84 million from Metrogas. The principal plus interest was repaid in June 2012.

On May 15, 2012 we obtained a short term unsecured credit facility of $50 million from Metrogas. The loan bore interest at 3 month LIBOR plus a margin of 1.9%. The principal plus interest was repaid in July 2012.

On June 7, 2012, we entered into a long-term unsecured credit facility of NOK 1,200 million with Metrogas that is repayable on July 31, 2013. This loan agreement was amended on June 14, 2012 and June 27, 2012 to increase the loan amount to a total of NOK 2,100 million ($352 million). Interest for the first period was three month NIBOR plus a 3.5% margin and for the subsequent interest periods the interest is the three month NIBOR plus a 4.5% margin. As of December 31, 2012, we repaid in full the borrowings under this facility.

On December 21, 2012, we obtained a short term loan in the amount of $93 million from Metrogas. The loan bears interest of LIBOR plus a margin and matures in March 2013.

On December 31, 2012, we obtained a short term loan from Metrogas in the amount of NOK140 million. The loan bears interest of NIBOR plus a margin and matures in March 2013.

Our debt agreements generally contain financial covenants as well as security provided to lenders in the form of pledged assets.

The main financial covenants contained in our bank loan agreements are as follows:

— Aggregated minimum liquidity requirement for the group, requires us to maintain cash and cash equivalents of at least $155 million within the group.

— Interest coverage ratio, which requires us to maintain an EBITDA to interest expense ratio of 2.5:1.

— Current ratio, which requires us to maintain a current assets to current liabilities ratio of at least 1:1. Current assets are defined as book value less minimum liquidity, but including up to 20% of shares in listed companies of which we own 20% or more. Current liabilities are defined as book value less the curent portion of long term debt.

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— Equity ratio, which requires us to maintain a total equity to total assets ratio of at least 30%. Both equity and total assets are adjusted for the difference between book and market values of drilling units.

— Leverage ratio, which requires us to maintain a ratio of net debt to EBITDA no greater than 4.5:1. Net debt is calculated as all interest bearing debt less cash and cash equivalents excluding minimum liquidity requirements.

For the purposes of the above tests, EBITDA is defined as the earnings before interest, taxes, depreciation and amortization on a consolidated basis for the previous period of twelve month period as such term is defined in accordance with accounting principles consistently applied. However, in the event that we acquire rigs or rig owning entities with historical EBITDA available for the rigs' previous ownership, such EBITDA shall be included for covenant purposes in the relevant acquisition agreements, and if necessary, be annualized to represent a twelve (12) months historical EBITDA. In the event that we acquire rigs or rig owning companies without historical EBITDA available, we are entitled to base a twelve month historical EBITDA calculation on future projected EBITDA only subject to any such new rig having (i) a firm charter contract in place at the time of delivery of the rig, with a minimum duration of twelve months, and (ii) a firm charter contract in place at the time of such EBITDA calculation, provided we provide our lenders with a detailed calculation of future projected EBITDA. Further, EBITDA shall include any realized gains and/or losses in respect of the disposal of rigs or the disposal of shares in rig owning companies.

The main covenants for our outstanding bonds are as follows:

— Equity ratio, which requires us to maintain a total equity to total assets ratio of at least 30%. Both equity and total assets are adjusted for the difference between book value and market values of drilling units.

— Equity ratio, which requires us to maintain a ratio of adjusted equity to total liabilities of at least 40%. Adjusted shareholder's equity is book value of equity adjusted for the difference between book and market values of drilling units.

Our secured credit facilities are secured by:

— guarantees from rig owning subsidiaries (guarantors),

— a first priority share pledge over all the shares issued by each of the guarantors,

— a first priority perfected mortgage in all collateral rigs and any deed of covenant thereto, subject to contractual agreed "quiet enjoyment" undertakings with the end-user of the collateral rigs to be entered into if this is required by the relevant end-user pursuant to the relevant contract,

— a first priority security interest over each of the rig owners' with respect to all earnings and proceeds of insurance, and

— a first priority security interest in the earnings accounts.

Our loan and other debt agreements also contain, as applicable, loan-to-value clauses, which could require the Company, at its option, to post additional collateral or prepay a portion of the outstanding borrowings should the value of the drilling units securing borrowings under each of such agreements decrease below required levels. In addition, the loan and other debt agreements include certain financial covenants including the requirement to maintain a certain level of free cash and failure to comply with any of the covenants in the loan agreements could result in a default under those agreements and under other agreements containing cross-default provisions.  We were in compliance with all financial loan covenants as of December 31, 2012.

As of December 31, 2012, the three month United States dollar LIBOR was 0.31%, as compared to 0.58% in 2011 and three month NIBOR was 1.83%, as compared to 2.89% in 2011.

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Derivatives

We use financial instruments to reduce the risk associated with fluctuations in interest and foreign exchange rates. Most of these agreements do not qualify for hedge accounting and any changes in the fair values of the financial instruments are included in the Consolidated Statement of Operations under "gain/(loss) on derivative financial instruments." One of our consolidated VIEs have executed interest rate cash flow hedges in the form of an interest rate swap. The movements in the fair value of this hedging swap are reflected in "Accumulated other comprehensive income (loss)."

As of December 31, 2012, we had a gain of $3 million in our Statement of Operations consisting of the following:

Interest-rate swap agreements and forward exchange contracts: Total realized and unrealized loss on interest-rate swap agreements, not qualified for hedge accounting, and forward exchange contracts amounted to $80.6 million for the year ended December 31, 2012. The loss is recognized in the statement of operations as gain/(loss) on derivative financial instruments.

As of December 31, 2012, the Company and its consolidated subsidiaries, including VIEs, had entered into interest rate swap contracts with a combined outstanding principal amount of $6.6 billion, as compared to $5.7 billion in 2011, at rates between 0.74 % per annum and 4.63 % per annum, as compared to 2.06% and 4.63% in 2011.  The overall effect of these swaps is to fix the interest rate on $6.6 billion of floating rate debt at a weighted average interest rate 2.41% per annum, as compared to $5.7 billion at 2.84% in 2011. As of December 31, 2012, our net exposure to short term fluctuations in interest rates on our outstanding debt was $1.8 billion, as compared to $2.7 billion in 2011, based on our total net interest bearing debt of $11 billion less the $6.6 billion outstanding balance of fixed interest rate swaps, less the $2.6 billion in fixed interest loans.

Other derivative instruments: Total realized and unrealized gain on other derivative instruments amounted to $84 million for the year ended December 31, 2012, mainly due to realized gains on our Ensco forward contracts.

As of December 31, 2012, we had entered into forward exchange contracts to sell approximately $528 million, as compared to $264 million in 2011, in exchange for Norwegian Kroner between January 2013 and February 2014, at exchange rates ranging from NOK5.64 to NOK5.79 per US dollar.

Total Return Swaps: In February 2010, a TRS agreement with 4,500,000 shares in Seadrill as underlying security was settled and the Company simultaneously entered a new TRS agreement for 3,500,000 of common shares in Seadrill with an agreed reference price of NOK125.70 per share and an expiration date in February 2011. In September 2010, the Company partly settled the TRS agreement and reduced the number of underlying Seadrill Limited shares by 750,000 shares from 3,500,000 shares to 2,750,000 common shares. In January 2011, the Company partly settled the TRS agreement and further reduced the number of underlying Seadrill Limited shares by 750,000 shares from 2,750,000 to 2,000,000 common shares. In September 2011, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in March 2012 and the agreed reference price was NOK177.21 per share. In March 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in September and the agreed reference price was NOK 224.70 per share. In September 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in December and the agreed reference price was NOK 242.80 per share. In December, 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expires in March 2013 and the agreed reference price was NOK 220.32 per share. The total realized and unrealized gain relating to TRS agreements in 2012 amounted to $7 million (2011: $5 million, 2010: $27 million).

The settlement amount for the TRS transaction will be (A) the market value of the shares at the date of settlement plus all dividends paid by the Company between entering into and settling the contract, less (B) the reference price of the shares agreed at the inception of the contract plus the counterparty's financing costs. Settlement will be either a payment by the counterparty to us, if (A) is greater than (B), or a payment by us to the counterparty, if (B) is greater than (A). There is no obligation for us to purchase any shares under the agreement and this arrangement has been recorded as a derivative transaction, with the fair value of the TRS recognized as an asset or liability as appropriate, and changes in fair values recognized in the consolidated statement of operations.

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In addition to the above TRS transactions, we may from time to time enter into short-term TRS arrangements relating to securities in other companies. The above TRS indexed to our own common shares was our only TRS agreement as of December 31, 2012.

Equity

As of December 31, 2012, the number of common shares issued, of par value $2.00 each, was 469,250,933 and fully paid share capital amounted to $938 million, unchanged from December 31, 2011. In May, 2011, we issued 25,942,446 shares related to the settlement for early conversion of convertible debt, the total proceeds from the share issue was approximately $721 million.

In 2010, we issued new common shares on three occasions, 655,000 shares related to the exercise of stock options in March, 12,500,000 shares related to a private placement in April, which was completed as part of the Scorpion and West Elara (CJ70) acquisitions, and 31,020,271 related to the settlement for early conversion of convertible debt in December. In 2010, the total proceeds from the share issue were approximately $1,065 million including the conversion of the convertible debt.

As of December 31, 2012, we were holding 72,859 of our common shares as treasury shares, as compared to 1,478,759 in 2011 and 182,796 in 2010. Net outstanding share capital amounted to $938 million, as compared to $935 million in 2011 and $886 million in 2010. A share repurchase program was approved by the Board in 2007, authorizing us to buy back shares which may be either cancelled, or held as treasury shares to meet our obligations relating to our share option scheme. Under the program no shares were purchased in the year ended December 31, 2012; however, 3,250,000 shares were purchased in the year ended December 31, 2011, and 1,750,000 shares were purchased in the year ended December 31, 2010.

In May 2005, a general meeting of the Company approved authorizing the Board of Directors to establish and maintain an employee share option scheme, or the Option Scheme, in order to encourage the holding of shares in the Company by individuals including directors, officers and employees of the Company. The Board of Directors has made a number of grants pursuant to rules established to implement the Option Scheme. As of December 31, 2012, we have granted 4.9 million options, of which 3.9 million remain outstanding. The fair value of the options granted is recognized in the statement of operations as an expense, with a corresponding amount credited to additional paid in capital (see Note 28 to the Consolidated Financial Statements). The additional paid-in capital arising from share options was $8 million in the year ended December 31, 2012, as compared to $10 million in 2011 and $11 million in 2010.

As of December 31, 2012, our total additional paid-in capital including contributed surpluses amounted to $4.1 billion, as compared to $4.1 billion in 2011 and $3.2 billion in 2010, of which $2.9 billion arises from shares issued at a premium, with the remaining balance attributable to the Option Scheme, purchases and sales of treasury shares, share issuance in NADL, the equity component convertible bonds and conversion of convertible bonds.

As of December 31, 2012, we were party to a TRS agreement with 2,000,000 of our common shares as underlying security, whereby we are exposed to movements in the price of our shares (see "Derivatives" above). In March 2013, the TRS agreement was settled and we simultaneously entered into a new TRS agreement with 2,000,000 of our common shares as underlying security, which is due to expire in June 4, 2013, with a reference price of NOK213.17 per share.

C. RESEARCH AND DEVELOPMENT, PATENTS AND LICENSES, ETC.

We do not undertake any significant expenditure on research and development, and have no significant interests in patents or licenses.

D. TREND INFORMATION

The demand for offshore drilling services continues to benefit from strong capital expenditure offshore worldwide from oil and gas companies. As a result, daily rates and contract length have continued to improve for all asset classes over the last year. There is limited near term supply in the ultra-deepwater market, and the benign jack-up market has witnessed daily rates approaching $200,000 for some fixtures with three year contracts. In the same period our customers have continued to report significant new offshore oil and gas discoveries in mature as well as frontier areas. This success coincides with continued growth in exploration and production spending in offshore regions by oil and gas companies.

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Ultra-deepwater floaters (>7,500 ft water)

The global demand for ultra-deepwater drilling services has continued to show strength over the last twelve months. The number of rigs available for employment in 2012 is limited as market sources indicate that with some exceptions the available capacity has been assigned to specific customers. The demand is primarily driven by demand in the Gulf of Mexico and Africa where there has been significant exploration successes.  In the Gulf of Mexico it is estimated that more than 50% of the reserves are in water depths greater than 5000ft and as a result well designs involve more technically demanding well construction techniques. These characteristics both drive the demand towards newer rigs with greater loadpath capacities. History has demonstrated that there is a clear correlation with exploration success followed by incremental rig demand due to the number of wells needed to delineate and develop these find. This has translated into oil and gas companies looking to secure future rig capacity early. In 2012, we contracted out several ultra-deepwater rigs that were not available before 2014, and also our newbuild West Mira that will be delivered in 2015 was awarded a five-year contract. The daily rates continue to be in the $550,000 to $650,000 range depending on location and contract duration.

Premium jack-up rigs (>350 ft water)

The overall demand for jack-ups rigs globally has improved and the global utilization rate for jack-up rigs has increased to 84% based on increased incremental demand in the Middle East, Asia, and Africa.  As a result, the number of warm stacked and cold stacked jack-up rigs has been reduced. For newer jack-up rigs, built after 2000 and with more than 350ft water depth capacity, the market balance remain sound with a high utilization rate of 95% supported by strong demand for in most regions. In light of this development, daily rates for older jack-up rigs have improved to cater for reactivation cost for such units. For newer jack-up rigs we have seen daily rates of close to $200,000 and increase in contract length with several multiyear contracts being awarded.

The observed market development suggests a positive trend in terms of rig demand, utilization rates, contract length and levels for daily rates. In this environment oil companies continue to show a preference for newer equipment due to their superior technical capacities and operational flexibility.

Tender Rigs

The demand for our tender rigs is mainly driven from Asia and Africa, and they account for 80% and 17% of the overall utilization in this market, respectively. Our customers have demonstrated a strong focus on operational efficiency something that favors newer equipment and experienced operators. We also see an increasing awareness from oil companies for the tender rig concept and its benefits in term of efficiency and operability.

E. OFF BALANCE SHEET ARRANGEMENTS

As described above, we are party to a TRS agreement that has our own common shares as underlying security. The fair value of this position as of December 31, 2012 and 2011, respectively, is reflected in the Consolidated Financial Statements included in Item 18 of this Annual Report.

F. CONTRACTUAL OBLIGATIONS

At December 31, 2012, we had the following contractual obligations and commitments:

	Payment due by period
(In millions of US dollars)	Less than 1 year		1 – 3 years		3 – 5 years		After 5 years		Total
3.375% convertible bonds due 2017 (1)		-		-		650		-		650
Interest bearing debt		2,066		4,659		3,459		15		10,199
Related party interest bearing debt		119		-		500		435		1,054
Total debt repayments		2,185		4,659		4,609		450		11,903
Accrued pension liabilities		19		21		11		4		55
Operating lease obligations		23		23		15		21		82
Drilling unit purchases (2)		2,711		2,893		-		-		5,604
Total contractual cash obligations		4,938		7,596		4,635		475		17,644

(1) In October 2010, we issued $650 million of 3.375% convertible bonds with maturity 2017. Due to the hybrid nature of this financial instrument, for accounting purposes the liability is divided into $561 million of debt and $89 million of equity. The above contractual obligations assume that none of the bonds are converted into common shares and that the full $650 million is repayable in 2017. Accordingly, total debt repayments shown above exceed the interest bearing debt shown in the consolidated balance sheet by $89 million as of December 31, 2012.

(2) Drilling unit purchase commitments relate to five jack-up rigs equaling a total price of $1.0 billion,five tender rigs of $0.4 billion,two semi-submersible rigs of $1.1 billion, and seven drillships of $3.1 billion.

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G. SAFE HARBOR

See section entitled "Forward Looking Statements" in this Annual Report.

ITEM 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES

A. DIRECTORS AND SENIOR MANAGEMENT

The following table sets forth information regarding our directors and officers, and also certain key employees within our operating subsidiaries, who are responsible for overseeing the management of our business.

Name	Age	Position
John Fredriksen	68	President, Director and Chairman of the Board
Tor Olav Trøim	49	Vice President and Director
Kate Blankenship	48	Director and Audit Committee member
Carl Erik Steen	61	Director
Kathrine Fredriksen	29	Director
Bert Bekker	74	Director
Paul Leand Jr.	46	Director
Georgina Sousa	62	Company Secretary
Fredrik Halvorsen	39	Chief Executive Officer and President, Seadrill Management
Per Wullf	53	Chief Operating Officer and Executive Vice President, Seadrill Management
Robert Hingley-Wilson	39	Chief Accounting Officer and Senior Vice President, Seadrill Management
Rune Magnus Lundetræ	36	Chief Financial Officer and Senior Vice President, Seadrill Management
Anton Dibowitz	41	Chief Commercial Officer and Senior Vice President, Seadrill Management
Svend Anton Maier	49	Senior Vice President Africa, Middle-East
Iain Hope	44	Senior Vice President Americas
Eduardo Antonello	37	Senior Vice President, South America
Alf Ragnor Løvdal	56	Senior Vice President and CEO of  North Atlantic Management

Certain biographical information about each of our directors, executive officers and key officers is set forth below.

John Fredriksen has served as Chairman of the Board, President and a director of the Company since its inception in May 2005. Mr. Fredriksen has established trusts for the benefit of his immediate family which control Hemen, our largest shareholder. Mr. Fredriksen is Chairman, President, Chief Executive Officer and a director of a related party Frontline, a Bermuda company listed on the NYSE, the Oslo Stock Exchange and the London Stock Exchange. He is also a director of a related party, Golar LNG Limited, or Golar, a Bermuda company listed on the Nasdaq Global Market and the Oslo Stock Exchange whose principal shareholder is World Shipholding Limited, a company indirectly influenced by trusts established by Mr. John Fredriksen for the benefit of his immediate family. He is also a director of a related party Golden Ocean Group Limited, or Golden Ocean, a Bermuda company publicly listed on the Oslo Stock Exchange and on the Singapore stock exchange, whose principal shareholder is Hemen.

Tor Olav Trøimhas served as Vice-President and a director of the Company since its inception in May 2005. Mr. Trøim graduated as M.Sc Naval Architect from the University of Trondheim, Norway in 1985. His careers include Equity Portfolio Manager with Storebrand ASA (1987-1990), and Chief Executive Officer for the Norwegian Oil Company DNO AS (1992-1995). Mr. Trøim has also been a director of Seadrill Partners since July 2012, and of Archer Limited since its incorporation in 2007. Mr. Trøim is also a director of Golar, Golar LNG Partners, and is currently a director of two Oslo Stock Exchange listed companies, Golden Ocean (also listed on the Singapore Stock Exchange) and Marine Harvest ASA. He served as a director of Frontline from November 1997 until February 2008.

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Kate Blankenship has served as a director of the Company since its inception in May 2005. Mrs. Blankenship has also served as a director of Frontline since 2003. Mrs. Blankenship joined Frontline in 1994 and served as its Chief Accounting Officer and Secretary until October 2005. Mrs. Blankenship has been a director of Ship Finance since October 2003. Mrs. Blankenship has been a director of Seadrill Partners since June 2012, North Atlantic since February 2011, Independent Tankers Corporation Limited since February 2008, Golar since July 2003, Golar LNG Partners since September 2007, Golden Ocean since November 2004, and Archer Limited since its incorporation in 2007. She is a member of the Institute of Chartered Accountants in England and Wales.

Carl Erik Steen was appointed to the Board in February 2011, filling the vacancy left by the retirement of former board member Kjell E Jacobsen on December 31, 2010. In 1975, Mr. Steen graduated from ETH Zurich Switzerland with a M.Sc. in Industrial and Management Engineering. He then worked as a consultant in various Norwegian companies before joining I.M. Skaugen as a Director in 1978. In 1983, Mr. Steen moved to Christiania Bank Luxembourg, and in 1987 returned to Norway to establish the international shipping desk of Christiania Bank. In 1992, Mr. Steen was appointed Executive Vice President with the responsibility of Christiania Bank's Shipping, Offshore and International activities. From January 2001 until February 2011, Mr. Steen was head of Nordea Bank's Shipping, Oil Services & International Division. Mr. Steen is also a board member of Eksportfinans (the Norwegian export credit institution for Export Financing), Wilh. Wilhelsen Holding ASA, Eitzen Chemical ASA and RS Platou ASA.

Kathrine Fredriksen has served as a director of the Company since September 2008. Ms. Fredriksen has also served as a director of Golar since February 2008. She graduated from Wang Handels Gymnas in Norway and studied at the European Business School in London. Ms. Fredriksen is the daughter of Mr. John Fredriksen, our President and Chairman.

Bert Bekker was appointed to the Board on April 25, 2013. Mr. Bekker has been in the heavy marine transport industry since 1978 when he co-founded Dock Express Shipping Rotterdam (the predecessor of Dockwise Transport). Mr. Bekker retired from his position as Chief Executive Officer of Dockwise Transport B.V. in May 2003. Mr. Bekker served as Chief Executive Officer of Cableship Contractors N.V. Curacao from March 2001 until June 2006. In May 2006, Mr. Bekker was appointed Executive Advisor Heavy Lift of Frontline Management AS, an affiliate of Frontline, and in January 2007, he was appointed CEO of Sealift Management B.V. Mr. Bekker held that position until its merger with Dockwise Ltd in May 2007. Mr. Bekker served as a director of Dockwise Ltd. from June 2007 until December 2009. Mr. Bekker currently serves as a director of Wilh. Wilhelmsen Netherlands B.V., part of the Wilh. Wilhelmsen ASA Group, and has served as a director since July 2003. Mr. Bekker is also on the board of Seadrill Partners.

Paul Leand was appointed to the Board on April 25, 2013. Mr. Leand is the Chief Executive Officer and director of AMA Capital Partners LLC, or AMA, an investment bank specializing in the maritime industry. Mr. Leand has also served as a director of Ship Finance since 2003. From 1989 to 1998 Mr. Leand served at the First National Bank of Maryland where he managed the Bank's Railroad Division and its International Maritime Division. He has worked extensively in the U.S. capital markets in connection with AMA's restructuring and mergers and acquisitions practices. Mr. Leand serves as a member of American Marine Credit LLC's Credit Committee and served as a member of the Investment Committee of AMA Shipping Fund I, a private equity fund formed and managed by AMA.

Georgina Sousa has served as Company Secretary of the Company since February 2006. She is currently Head of Corporate Administration for Frontline. Until January 2007, she was Vice-President-Corporate Services of Consolidated Services Limited, a Bermuda Management Company, having joined the firm in 1993 as Manager of Corporate Administration.  From 1976 to 1982 she was employed by the Bermuda law firm of Appleby, Spurling & Kempe as a Company Secretary and from 1982 to 1993 she was employed by the Bermuda law firm of Cox & Wilkinson as Senior Company Secretary.

Fredrik Halvorsen was appointed CEO and President in October 2012.  Mr. Halvorsen works for Frontline Corporate Services Ltd and is a Director of Deep Sea Supply Plc., where he has served since October 2010.  He has been a Director of Archer since 2010, stepping in as interim CEO of Archer in January 2012.  He is also a Director of Deep Sea Supply and Aktiv Kapital.  Prior to this, Mr. Halvorsen held various roles including CEO of Tandberg ASA, and senior positions at Cisco Systems Inc as well as McKinsey & Company. 

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Per Wullf has served as the Chief Operating Officer and Executive Vice President of Seadrill Management since February 2009. Mr. Wullf has more than 28 years of experience in the international offshore and onshore drilling industry with A.P. Moller - Maersk A/S, serving as Managing Director for Maersk Drilling Norge AS from 2006 to 2009.

Robert Hingley-Wilson was appointed CAO, and Senior Vice President of Seadrill Management, in February 2012. Mr. Hingley-Wilson has served as Group Chief Accountant to a group of related companies since 2010 as an employee of Frontline Corporate Services UK Ltd.  Mr. Hingley-Wilson has an extensive background in M&A and complex accounting with both Frontline Ltd and its associated companies and in PricewaterhouseCoopers in New York City and London, where Mr. Hingley-Wilson worked from 1996 until joining Frontline in 2010. Mr. Hingley-Wilson has a law degree and trained as a Solicitor in the United Kingdom, and has been a member of the Institute of Chartered Accountants in England and Wales since 1998.

Rune Magnus Lundetræ was appointed Chief Financial Officer and Senior Vice President in February 2012. Before his current position Mr. Lundetræ was Finance Director for Seadrill Americas and Commercial Director for Seadrill Europe (now North Atlantic Drilling Limited). He also served as CFO for Scorpion Offshore Ltd after Seadrill acquired a majority stake in the company in July 2010 and up to delisting the company in November 2010. Prior to joining Seadrill Mr. Lundetræ worked as an auditor for KPMG and PricewaterhouseCoopers in Stavanger, Norway from 2001 until 2007. Mr. Lundetræ graduated as MSc in Management from the London School of Economics in 2001 and as MSc in Accounting and Auditing from the Norwegian School of Business Administration (NHH) in 2004. He registered as a Certified Public Accountant (CPA) in Norway in 2005.

Anton Dibowitz was appointed Chief Commercial Officer and Senior Vice President in January 2013. He has 15 years drilling industry experience most recently serving as Vice President Marketing and prior to that as Commercial Director, Deepwater Western Hemisphere Division, since joining Seadrill in April 2007. Prior to Seadrill, Mr Dibowitz held various positions within tax, process reengineering and marketing at Transocean and Ernst & Young LLP.  He is a Certified Public Accountant and a graduate of the University of Texas at Austin where he has a bachelors degree in Business Administration, and masters degrees in Professional Accounting (MPA) and Business Administration (MBA).

Svend Anton Maier has served as Senior Vice President, Africa and Middle-East since January 2011. Mr. Maier joined the Company in February 2007 as Vice President, Deepwater Eastern Hemisphere. Mr. Maier has more than 20 years of experience in the offshore drilling industry. Prior to joining us, Mr. Maier held several senior positions in Transocean Ltd., including operations manager in Egypt, Equatorial Guinea and Gabon. Mr. Maier graduated from the Maritime Institute of Tønsberg with a degree in marine engineering.

Iain Hope joined Seadrill in 2009 and has served as Senior Vice President Americas since January 2011. Mr. Hope has 20 years of experience in the drilling industry, most recently as director of operations excellence for Seadrill Americas. Prior to joining Seadrill, Mr. Hope held several senior positions at Transocean including division manager South America, director of deepwater marketing, operation manager North America and rig manager in Brazil, West Africa and North Sea. He has a bachelor degree in Electrical and Electronic Engineering from Robert Gordon's, Aberdeen and completed postgraduate studies in Drilling Engineering prior to entering the industry.

Alf Ragnar Løvdal has been the Chief Executive Officer of North Atlantic Management AS since January 2013.Mr. Løvdal has served as Senior Vice President for Seadrill in Asia Pacific from April 2009 till December 2012. He was previously CEO in Seawell Management AS. Mr. Løvdal has close to 30 years of experience from the oil and gas industry, of which 20 years as responsible for the well services business in the drilling contractor Smedvig, which Seadrill acquired in early 2006. Mr. Løvdal has over the years held several senior positions, including general manager operations for the mobile units. Prior to his engagement with Smedvig, Mr. Løvdal held various positions in different oil service companies, including five years of offshore field experience with Schlumberger. He has a degree in mechanical engineering from Horten Engineering Academy in Norway.

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Eduardo Antonello was appointed Senior Vice President of Seadrill Brazil, in May 2012. Mr. Antonello has served as Latin America Area Manager since the establishment of the company in the country in 2008, with extensive knowledge of the local industry, authorities and regulations. Mr. Antonello has previous international background in business development activities, operations management, well services and drilling engineering, having worked for Schlumberger in the Middle East, United States, England and most recently as country manager in Brazil. He has a degree in mechanical engineering from the Mackenzie University of São Paulo.

B.           COMPENSATION

During the year ended December 31, 2012, we paid our directors and executive officers aggregate compensation of $32.9 million, including compensation in the form of options exercised. In addition we have incurred compensation expense in the aggregate amount of $0.1 million for their pension and retirement benefits. These amounts include compensation of $6.6 million paid to the Chief Executive Officer, excluding compensation related to exercised options, and $0.05 million expensed for the Chief Executive Officer's pension and retirement benefits. The increase compared to previous year is mainly related to termination expenses paid both to the prior Chief Executive Officer and Chief Financial Officer.

In the event the Chief Executive Officer resigns at the request of the Board of Directors, he will receive compensation equal to his salary for two years.

In addition to cash compensation, during 2012 we also recognized an expense of $2.1 million relating to stock options granted in 2009, 2010 and 2011 to certain of our directors and employees. The options vest over a two to four year period, with the first tranche vesting in May 2013, and they expire between May 2014 and April 2017. The exercise price of the options at December 31, 2012, was in the range NOK31.3 to NOK173.0 (equivalent to $5.6 to $30.9) per share, and will for most options be reduced by the amount of any future dividends declared with respect to the common shares.

C. BOARD PRACTICES

Our Board of Directors is elected annually by a vote of a majority of the common shares represented at the meeting at which one or more holders of one-third of our outstanding common shares constitutes a quorum. In addition, the maximum and minimum number of directors is determined by our shareholders at the annual general meeting, but no less than two directors shall serve at any given time. Each director shall hold office until the next annual general meeting following his or her election or until his or her successor is elected.

Our Board of Directors currently consists of seven directors. All of our directors also serve on the boards of other companies in which Trusts, established for the benefit of Mr. Fredriksen's immediate family, also have significant shareholdings. Four of our directors, Kate Blankenship, Carl Steen, Paul Leand and Bert Bekker are independent pursuant to Rule 10A-3 of the Securities Exchange Commission Act of 1934, as amended.

We currently have an audit committee, which is responsible for overseeing the quality and integrity of our financial statements and its accounting, auditing and financial reporting practices, our compliance with legal and regulatory requirements, the independent auditor's qualifications, independence and performance and our internal audit function. Our audit committee consists of Mrs. Blankenship.

We currently have a compensation committee responsible for establishing and reviewing the executive officers' and senior managements' compensation and benefits. Our committee consists of Mr. Trøim and Mrs. Blankenship.

In lieu of a nomination committee, our Board of Directors is responsible for identifying and recommending potential candidates to become board members and recommending directors for appointment to board committees.

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There are no service contracts between us and any of our directors providing for benefits upon termination of their employment or service.

As a foreign private issuer we are exempt from certain requirements of the New York Stock Exchange that are applicable to U.S. listed companies. For a listing and further discussion of how our corporate governance practices differ from those required of U.S. companies listed on the New York Stock Exchange, please see Item 16G or visit the corporate governance section of our website at www.seadrill.com.

D. EMPLOYEES

As of December 31, 2012, we had approximately 8,700 employees.

Some of our employees and our contracted labor, most of who work in Brazil, Nigeria, Norway and the U.K., are represented by collective bargaining agreements. As part of the legal obligations in some of these agreements, we are required to contribute certain amounts to retirement funds and pension plans and have restricted ability to dismiss employees. In addition, many of these represented individuals are working under agreements that are subject to salary negotiation. These negotiations could result in higher personnel costs, other increased costs or increased operating restrictions that could adversely affect our financial performance.

We consider our relationships with the various unions as stable, productive and professional. At present, there are no ongoing negotiations or outstanding issues.

Total employees (including contracted-in staff )	December 31, 2010		December 31, 2011		December 31, 2012
Operating segments:
Floaters		3,000		3,170		3,900
Jack-up rigs		1,500		1,900		2,150
Tender rigs		2,100		2,300		2,500
Corporate		100		130		150
Total employees		6,700		7,500		8,700
Geographical location:
Norway		1,100		1,100		1,350
Rest of Europe		0		100		100
USA		500		600		1,250
South America		1,100		1,100		700
Asia and Australia		3,100		3,200		3,050
Africa		900		1,400		2,250
Total employees		6,700		7,500		8,700

The number of employees has increased over the three years to December 31, 2012 as a result of the increase in our operating fleet of drilling units and business acquisitions.

E. SHARE OWNERSHIP

The table below shows the number of common shares beneficially owned and the percentage owned of our outstanding common shares for our directors, officers and key employees as of April 22, 2013, and the percentage held of the total common shares in issue. Also shown are their interests in share options awarded to them under the Option Scheme which was approved by the Company in May 2005. The subscription price for options granted under the scheme will normally be reduced by the amount of all dividends declared by the Company in the period from the date of grant until the date the option is exercised.

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Director or Key Employee	Beneficial Interest in Common Shares of $2.00 each		Interest in Options
	Number of shares	%	Total number of options	Number of options vested	Exercise price	Expiry date
John Fredriksen (2)	(2)	(2)	-	-	-	-
Tor Olav Trøim (3)	635,000	(1)	-	-	-	-
Kate Blankenship	41,000	(1)	20,000	20,000	NOK31.3	May 2014
Kathrine Fredriksen	-	(1)	-	-	-	-
Carl Erik Steen	-	(1)	-	-	-	-
Georgina Sousa	-	(1)	-	-	-	-
Fredrik Halvorsen	-		-	-	-	-
Per Wullf	-	(1)	50,000 60,000 60,000	50,000 24,000 -	NOK31.3 NOK139.3 NOK173.0	May 2014 December  2015 December 2016
Rune Magnus Lundetræ	-	(1)	3,400 20,000 15,000 15,000 40,000	- 10,000 6,000 - -	NOK31.3 NOK137.4 NOK192.9 NOK202.1 NOK198.9	May 2014 May 2015 December 2015 December 2016 April 2017
Robert Hingley-Wilson	-	(1)	40,000	-	NOK198.9	April 2017
Iain Hope	-	(1)	13,400  60,000 40,000	13,400 16,000 -	NOK104.6 NOK192.9 NOK 202.1	May 2014 December 2015 December 2016
Alf Ragnar Løvdal	-	(1)	60,000 24,000	-	NOK139.3 NOK173.0	December 2015 December 2016
Svend Anton Maier	-	(1)	60,000 40,000	16,000 -	NOK139.3 NOK173.0	December 2015 December 2016
Raphael Siri	-	(1)	15,000	-	NOK173.0	April 2017

(1) less than 1%

(2) Hemen Holding Limited, a Cyprus holding company, and other related companies which are collectively referred to herein as Hemen, the shares of which are held in trusts established by Mr. John Fredriksen for the benefit of his immediate family. Mr. Fredriksen disclaims beneficial ownership of the 115,097,583 shares of our common stock held by Hemen, except to the extent of his voting and dispositive interest in such shares of common stock. Mr. Fredriksen has no pecuniary interest in the shares held by Hemen. On April 18, 2013, a related trust bought in market transactions 2,000,000 call options with a strike price of $40 and maturity January 2015, for a price of $1.0678 per option. In addition, to the holdings of shares and options contained in the table above, as of April 22, 2013, Hemen is party to separate TRS agreements relating to 3,900,000 of our common shares.

(3) In addition to the holdings of shares and options contained in the table above, as of April 22, 2013, Drew Investment Ltd., a company controlled by Tor Olav Trøim, is party to separate TRS agreements relating to 600,000 of our common shares. In addition, on April 18, 2013, a related company controlled by Mr. Trøim bought by market transactions 1,000,000 call options with strike price of $40 and maturity January 2015, for a price of $1.0678 per option.

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ITEM 7. MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS

A. MAJOR SHAREHOLDERS

The following table presents certain information as at April 22, 2013, regarding the ownership of our common shares with respect to each shareholder whom we know to beneficially own more than 5% of our outstanding common shares:

	Common Shares Held
Shareholder	Number		%
Hemen (1)		115,097,583		24.5	%

(1) As discussed above, the shares of Hemen are held in trusts established by Mr. John Fredriksen for the benefit of his immediate family.

As of April 22, 2013, we had a single shareholder of record in the United States, in whose name all shareholdings in the United States are recorded. We had a total of 469,250,933 common shares outstanding of which 141,009 were held as treasury shares, as of April 22, 2013.

Our major shareholders have the same voting rights as our other shareholders. No corporation or foreign government owns more than 50% of our outstanding common shares. We are not aware of any arrangements, the operation of which may at a subsequent date result in a change in control of Seadrill.

B. RELATED PARTY TRANSACTIONS

We were formed on May 10, 2005, and our shares commenced trading on the Oslo Stock Exchange in November 2005.  Our shares commenced trading on the New York Stock Exchange in April 2010.  Since our formation, our largest shareholder has been Hemen, which currently holds approximately 24.5% of our shares.  Under the mandatory offer rules of the Oslo Stock Exchange, if Hemen were to acquire more than 1/3 of our shares, it could trigger the mandatory offer rules.  Hemen has not advised us of any intention to do so.

We transact business with the following related parties, being companies in which Hemen and companies associated with Hemen have a significant interest:

— Ship Finance International Limited, or Ship Finance;

— Asia Offshore Drilling Limited, or AOD;

— Metrogas Holdings Inc, or Metrogas;

— Frontline Management (Bermuda) Limited, or Frontline; and

— Archer Limited ("Archer")

We have entered into sale and lease back contracts for several drilling units with Ship Finance, a company in which our principal shareholders Hemen and companies associated with Hemen have a significant interest. Hemen is controlled by trusts established by our President and Chairman Mr. John Fredriksen for the benefit of his immediate family. We have determined that the Ship Finance subsidiaries, which own the units, are variable interest entities, or VIEs, and that we are the primary beneficiary of the risks and rewards connected with the ownership of the units and the charter contracts. Accordingly, these VIEs are fully consolidated in our consolidated financial statements. The equity attributable to Ship Finance in the VIEs is included in non-controlling interests in our consolidated financial statements.

During the year ended December 31, 2012, we incurred the following lease costs on units leased back from Ship Finance subsidiaries.

Rig	In millions of US dollar
West Polaris		114
West Hercules		75
West Taurus		114
Total		303

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These lease costs are eliminated on consolidation.

On July 1, 2010 our fully consolidated VIEs, SFL Deepwater Ltd and SFL Polaris Ltd, paid a dividend of $290 million and $145 million respectively to Ship Finance. Ship Finance simultaneously granted loans to SFL Deepwater Ltd and SFL Polaris Ltd for the same amounts. The loans bear interest at 4.5% per annum and comprise the balance of $435 million, reported as long-term debt due to related parties in our balance sheet as of December 31, 2012.

On June 24, 2011, we entered into a share sale and purchase agreement with Ship Finance, where we acquired all the shares of Rig Finance II Limited, which was the owner of West Prospero. The acquisition price for the shares amounted to $47 million. This transaction is accounted for as an equity transaction and no gain or loss is recognized.

In July 2011, we participated in a private placement in Asian Offshore Drilling (AOD) and were allocated shares for $54 million, which corresponds to a 33.75% ownership stake. AOD was established by Mermaid Maritime Public Company Limited in late 2010 when two MOD-V B Class jack-up rigs where ordered at Keppel FELS in Singapore. AOD had additional option agreements for construction of two similar units. Furthermore, it was agreed that we would be responsible for the construction supervision, project management and commercial management of all of AODs jack-up rigs. During the year of 2012 the Company has acquired additional shares in AOD and the Company's holding of AOD as of December 31, 2012 was 26,463,050, representing 66.16% of all of the issued shares in AOD. This investment is accounted for as an equity method investment (See also note 16).

On March 31, 2012, we obtained a short-term unsecured credit facility of $84 million from Metrogas. The principal plus interest was repaid in June 2012.

On May 15, 2012 we obtained a short term unsecured credit facility of US$50 million from Metrogas. The principal plus interest was repaid in July 2012.

On June 7, 2012 we obtained a long term unsecured credit facility of NOK1,200 million from Metrogas. This loan agreement was amended on June 14 and June 27 increasing the loan amount to a total of NOK2,100 (US$352 million). The principal plus interest was repaid in September 2012.

On June 27, 2012, we granted Archer a long term unsecured credit facility of US$20 million. The principal plus interest was repaid in July 2012.

On November 12, 2012, we granted Archer a short term unsecured loan of US$55 million. The loan bears interest of LIBOR + a margin and matured in February 2013.

On December 20, 2012, we sold it's holding in North Atlantic Drilling Ltd unsecured bond of  US$500 million to Metrogas plus accrued interest of US$9 million with a call option to repurchase the bond in full for a price equal to par plus unpaid accrued interest on the date of repurchase. The call option matures in June 2013. The obligation is recorded as a long term related party liability. In conjunction with this arrangement we also entered into a agreement to settle dividend payable to Metrogas in return for a short term unsecured loan of US$93 million. The bond bear a coupon of 7.75% per annum payable semi-annually in arrears. The net proceeds from these arrangements were US$415 million.

On December 21, 2012, we obtained a short term loan of US$93 million from Metrogas. The loan bears interest of LIBOR + a margin and matures in March 2013 and is reported as short term debt to related parties in our balance sheet as of December 31, 2012.

On December 31, 2012, we obtained a short term loan from Metrogas of NOK140 million. The loan bears interest of NIBOR + a margin and matures in March 2013 and is reported as short term debt to related parties in our balance sheet as of December 31, 2012.

Frontline provides management support and administrative services for the Company, and charged the Company fees of $2 million, $2 million and $1 million for these services in the years 2012, 2011 and 2010, respectively. These amounts are included in "General and administrative expenses".

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C. INTERESTS OF EXPERTS AND COUNSEL

Not applicable.

ITEM 8.                      FINANCIAL INFORMATION

A. CONSOLIDATED STATEMENTS AND OTHER FINANCIAL INFORMATION

Please see the section of this Annual Report on Form 20-F entitled Item 18 "Financial Statements."

Legal Proceedings

The Company is routinely party, as plaintiff or defendant, to claims and lawsuits in various jurisdictions for demurrage, damages, off-hire and other claims and commercial disputes arising from the operation of our drilling units, in the ordinary course of our business or in connection with our acquisition activities. The Company believes that the resolution of such claims will not have a material adverse effect on our operations or financial condition, and currently has no outstanding legal proceeding which we consider to be material.

Dividend Policy

Under our bye-laws, our board of directors may declare cash dividends or distributions, and may also pay a fixed cash dividend biannually or on other dates. The objective of our board of directors is to generate competitive returns for our shareholders. Any dividends declared will be in the sole discretion of the board of directors and will depend upon earnings, market prospects, current capital expenditure programs and investment opportunities. Under Bermuda law, a company may not declare or pay a dividend, or make a distribution out of contributed surplus, if there are reasonable grounds for believing that (a) the company is, or would after the payment be, unable to pay its liabilities as they become due; or (b) the realizable value of the company's assets would thereby be less than its liabilities.

In addition, since we are a holding company with no material assets other than the shares of our subsidiaries through which we conduct our operations, our ability to pay dividends will depend on our subsidiaries' distributing to us their earnings and cash flow.

For the years ended December 31, 2012, 2011, 2010 and 2009, we paid aggregate dividends to our shareholders in the amounts of $1,925 million ($4.31 per share), $1,423 million ($3.14 per share), $990 million ($2.41 per share) and $199 million ($0.5 per share), respectively. The $1.70 dividend per share paid in December 2012, includes the accelerated dividend of $0.85 for the fourth quarter.

We have paid dividends as follows:

Payment date	Amount per share
2012
March 23, 2012	$	0.80
June 7, 2012	$	0.97
September 20, 2012	$	0.84
December 21, 2012	$	1.70
2011
March 16, 2011	$	0.88
June 17, 2011	$	0.75
September 20, 2011	$	0.75
December 21, 2011	$	0.76
2010
March 26, 2010	$	0.55
July 2, 2010	$	0.60
September 24, 2010	$	0.61
December 30, 2010	$	0.65
2009
December 7, 2009	$	0.50

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B. SIGNIFICANT CHANGES

See Note 35 to our Consolidated Financial Statements

ITEM 9. THE OFFER AND LISTING

A. OFFER AND LISTING DETAILS

Shares of our common stock, par value $2.00 per share, have traded on the Oslo Stock Exchange, or OSE, since November 22, 2005, under the symbol "SDRL" and on the New York Stock Exchange, or NYSE, on April 15, 2010, also under the symbol "SDRL."

The NYSE listing is intended to be the Company's "primary listing" and the OSE listing is intended to be the Company's secondary listing.

The following table sets forth the fiscal years high and low closing prices of our common shares since they began trading, on the OSE in November 2005 and on the NYSE in April 2010:

	NYSE				OSE
	High (US$)		Low (US$)		High (NOK)		Low (NOK)
Fiscal year ended December 31
2012		42.07		32.07		244.20		192.90
2011		38.24		25.88		215.00		148.00
2010		34.76		18.09		207.80		115.90
2009						149.80		47.00
2008						179.75		41.60

The following table sets forth, for each full financial quarter for the two most recent fiscal years, the high and low closing prices of our common shares trading on the OSE and NYSE:

	NYSE				OSE
	High (US$)		Low (US$)		High (NOK)		Low (NOK)
Fiscal year ended December 31, 2013
First quarter		39.68		36.13		217.50		203.30

	NYSE				OSE
	High (US$)		Low (US$)		High (NOK)		Low (NOK)
Fiscal year ended December 31, 2012
First quarter		42.07		33.95		231.70		200.40
Second quarter		39.44		32.07		224.40		192.90
Third quarter		41.43		35.56		244.20		212.80
Fourth quarter		41.64		36.34		236.30		203.30

	NYSE				OSE
	High (US$)		Low (US$)		High (NOK)		Low (NOK)
Fiscal year ended December 31, 2011
First quarter		38.24		32.80		215.00		184.50
Second quarter		37.10		32.38		203.40		176.40
Third quarter		35.96		26.32		194.80		148.00
Fourth quarter		35.85		25.88		205.90		151.00

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	OSE
	High (NOK)		Low (NOK)
Fiscal year ended December 31, 2009
First quarter		68.80		47.00
Second quarter		101.25		65.40
Third quarter		120.60		83.00
Fourth quarter		149.80		115.60

	OSE
	High (NOK)		Low (NOK)
Fiscal year ended December 31, 2008
First quarter		141.00		102.75
Second quarter		179.75		135.50
Third quarter		160.25		114.75
Fourth quarter		114.00		41.60

The following table sets forth, for the six most recent months, the high and low closing prices of our common shares trading on the OSE and NYSE:

	NYSE				OSE
	High (US$)		Low (US$)		High (NOK)		Low (NOK)
April 2013 *		37.25		34.57		212.90		210.70
March 2013		37.58		36.82		214.10		211.10
February 2013		39.60		36.13		214.00		206.90
January 2013		39.68		37.65		217.50		203.30
December 2012		38.79		36.34		218.50		203.30
November 2012		41.13		37.51		234.80		215.80
October 2012		41.17		38.85		241.00		223.70

* For the period through and including April 22, 2013.

On April 22, 2013, the exchange rate between the Norwegian Kroner and the U.S. dollar was NOK5.86 to one US dollar.

B. MARKETS

Our common shares currently trade on the New York Stock Exchange and the Oslo Stock Exchange under the symbol "SDRL".

ITEM 10. ADDITIONAL INFORMATION

A. SHARE CAPITAL

Not applicable.

B. MEMORANDUM OF ASSOCIATION AND BYE-LAWS

The Memorandum of Association of the Company was filed as Exhibit 1.1 to the Company's Registration Statement on Form 20-F (Registration No. 001-34667), which was filed with the Commission on March 25, 2010, and is hereby incorporated by reference into this Annual Report.

The object of our business, as stated in section six of our Memorandum of Association, is to engage in any lawful act or activity for which companies may be organized under the Companies Act, 1981 of Bermuda, as amended (or the Companies Act), other than to issue insurance or re-insurance, to act as a technical advisor to any other enterprise or business or to carry on the business of a mutual fund. Our Memorandum of Association and bye-laws do not impose any limitations on the ownership rights of our shareholders.

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Shareholder Meetings. Under our Bye-laws, annual shareholder meetings will be held in accordance with the Companies Act at a time and place (other than Norway) selected by our board of directors. The quorum at any annual or general meeting is equal to one or more shareholders, either present in person or represented by proxy, holding in the aggregate shares carrying 33 1/3% of the exercisable voting rights. The meetings may be held at any place, in or outside of Bermuda that is not a jurisdiction which applies a controlled foreign company tax legislation or similar regime. Special meetings may be called at the discretion of the board of directors and at the request of shareholders holding at least one-tenth of all outstanding shares entitled to vote at a meeting. Annual shareholder meetings and special meetings must be called by not less than seven days' prior written notice specifying the place, day and time of the meeting. The board of directors may fix any date as the record date for determining those shareholders eligible to receive notice of and to vote at the meeting.

The Companies Act provides that a company must have a general meeting of its shareholders in each calendar year. The Companies Act does not impose any general requirements regarding the number of voting shares which must be present or represented at a general meeting in order for the business transacted at the general meeting to be valid. The Companies Act generally leaves the quorum for shareholders meeting to the company to determine in its Bye-laws. The Companies Act specifically imposes special quorum requirements where the shareholders are being asked to approve the modification of rights attaching to a particular class of shares (33.33%) or an amalgamation or merger transaction (33.33%) unless in either case the Bye-laws provide otherwise. The Company's Bye-laws do not provide for a quorum requirement other than 33.33%.

There are no limitations on the right of non-Bermudians or non-residents of Bermuda to hold or vote our common shares.

The key powers of our shareholders include the power to alter the terms of the Company's Memorandum of Association and to approve and thereby make effective any alterations to the Company's Bye-laws made by the directors. Dissenting shareholders holding 20% of the Company's shares may apply to the Court to annul or vary an alteration to the Company's Memorandum of Association. A majority vote against an alteration to the Company's Bye-laws made by the directors will prevent the alteration from becoming effective. Other key powers are to approve the alteration of the Company's capital including a reduction in share capital, to approve the removal of a director, to resolve that the Company be wound up or discontinued from Bermuda to another jurisdiction or to enter into an amalgamation or winding up. Under the Companies Act, all of the foregoing corporate actions require approval by an ordinary resolution (a simple majority of votes cast), except in the case of an amalgamation or merger transaction, which requires approval by 75% of the votes cast unless the Bye-Laws provide otherwise). The Company's Bye-laws only require an ordinary resolution to approve an amalgamation. In addition, the Company's Bye-laws confer express power on the board to reduce its issued share capital selectively with the authority of an ordinary resolution.

The Companies Act provides shareholders holding 10% of the Company's voting shares the ability to request that the board of directors shall convene a meeting of shareholders to consider any business which the shareholders wish to be discussed by the shareholders including (as noted below) the removal of any director. However, the shareholders are not permitted to pass any resolutions relating to the management of the Company's business affairs unless there is a pre-existing provision in the Company's Bye-Laws which confers such rights on the shareholders. Subject to compliance with the time limits prescribed by the Companies Act, shareholders holding 20% of the voting shares (or alternatively, 100 shareholders) may also require the directors to circulate a written statement not exceeding 1000 words relating to any resolution or other matter proposed to be put before, or dealt with at, the annual general meeting of the Company.

Majority shareholders do not generally owe any duties to other shareholders to refrain from exercising all of the votes attached to their shares. There are no deadlines in the Companies Act relating to the time when votes must be exercised.

The Companies Act provides that a company shall not be bound to take notice of any trust or other interest in its shares. There is a presumption that all the rights attaching to shares are held by, and are exercisable by, the registered holder, by virtue of being registered as a member of the company. The company's relationship is with the registered holder of its shares. If the registered holder of the shares holds the shares for someone else (the beneficial owner) then if the beneficial owner is entitled to the shares, the beneficial owner may give instructions to the registered holder on how to vote the shares. The Companies Act provides that the registered holder may appoint more than one proxy to attend a shareholder meeting, and consequently where rights to shares are held in a chain the registered holder may appoint the beneficial owner as the registered holder's proxy.

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Directors. The Companies Act provides that the directors shall be elected or appointed by the shareholders. A director may be elected by a simple majority vote of shareholders, at a meeting where shareholders holding not less than 33.33% of the voting shares are present in person or by proxy. A person holding 50% or more of the voting shares of the Company will be able to elect all of the directors, and to prevent the election of any person whom such shareholder does not wish to be elected. There are no provisions for cumulative voting in the Companies Act or the Bye-Laws and the Company's Bye-Laws do not contain any super-majority voting requirements. The appointment and removal of directors is covered by Bye-laws 89, 90 and 91.

There are procedures for the removal of one or more of the directors by the shareholders before the expiration of his term of office. Shareholders holding 10% or more of the voting shares of the Company may require the board of directors to convene a shareholder meeting to consider a resolution for the removal of a director. At least 14 days' written notice of a resolution to remove a director must be given to the director affected, and that director must be permitted to speak at the shareholder meeting at which the resolution for his removal is considered by the shareholders.

The Companies Act stipulates that an undischarged bankruptcy of a director (in any country) shall prohibit that director from acting as a director, directly or indirectly, and taking part in or being concerned with the management of a company, except with leave of the court. The Company's Bye-Law 92 is more restrictive in that it stipulates that the office of a Director shall be vacated upon the happening of any of the following events (in addition to the Director's resignation or removal from office by the shareholders):

— If he becomes of unsound mind or a patient for any purpose of any statute or applicable law relating to mental health and the Board resolves that he shall be removed from office;

— If he becomes bankrupt or compounds with his creditors;

— If he is prohibited by law from being a Director; or

— If he ceases to be a Director by virtue of the Companies Act.

Under the Company's Bye-laws, the minimum number of directors comprising the board of directors at any time shall be two. The board of directors currently consists of five directors. The minimum and maximum number of directors comprising the board of directors from time to time shall be determined by way of an ordinary resolution of the shareholders of the Company. The shareholders may, at the annual general meeting by ordinary resolution, determine that one or more vacancies in the board of directors be deemed casual vacancies. The board of directors, so long as a quorum remains in office, shall have the power to fill such casual vacancies. Each director will hold office until the next annual general meeting or until his successor is appointed or elected. The shareholders may call a Special General Meeting for the purpose of removing a director, provided notice is served upon the concerned director 14 days prior to the meeting and he is entitled to be heard. Any vacancy created by such a removal may be filled at the meeting by the election of another person by the shareholders or in the absence of such election, by the board of directors.

The Company's Bye-laws do not prohibit a director from being a party to, or otherwise having an interest in, any transaction or arrangement with the Company or in which the Company is otherwise interested. The Company's Bye-laws provide that a director who has an interest in any transaction or arrangement with the Company and who has complied with the provisions of the Companies Act and with its Bye-Laws with regard to disclosure of such interest shall be taken into account in ascertaining whether a quorum is present, and will be entitled to vote in respect of any transaction or arrangement in which he is so interested. The Company's Bye-law 97 provides its board of directors the authority to exercise all of the powers of the Company to borrow money and to mortgage or charge all  or any part of our property and assets as collateral security for any debt, liability or obligation. The Company's directors are not required to retire because of their age, and the directors are not required to be holders of the Company's common shares. Directors serve for one year terms, and shall serve until re-elected or until their successors are appointed at the next annual general meeting. The Company's Bye-laws provide that no director, alternate director, officer, person or member of a committee, if any, resident representative, or his heirs, executors or administrators, which we refer to collectively as an indemnitee, is liable for the acts, receipts, neglects, or defaults of any other such person or any person involved in our formation, or for any loss or expense incurred by us through the insufficiency or deficiency of title to any property acquired by us, or for the insufficiency of deficiency of any security in or upon which any of our monies shall be invested, or for any loss or damage arising from the bankruptcy, insolvency, or tortious act of any person with whom any monies, securities, or effects shall be deposited, or for any loss occasioned by any error of judgment, omission, default, or oversight on his part, or for any other loss, damage or misfortune whatever which shall happen in relation to the execution of his duties, or supposed duties, to us or otherwise in relation thereto. Each indemnitee will be indemnified and held harmless out of our funds to the fullest extent permitted by Bermuda law against all liabilities, loss, damage or expense (including but not limited to liabilities under contract, tort and statute or any applicable foreign law or regulation and all reasonable legal and other costs and expenses properly payable) incurred or suffered by him as such director, alternate director, officer, person or committee member or resident representative (or in his reasonable belief that he is acting as any of the above). In addition, each indemnitee shall be indemnified against all liabilities incurred in defending any proceedings, whether civil or criminal, in which judgment is given in such indemnitee's favor, or in which he is acquitted. The Company is authorized to purchase insurance to cover any liability it may incur under the indemnification provisions of its Bye-laws. The indemnification provisions are covered by Bye-laws 138 through 146.

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Dividends. Holders of common shares are entitled to receive dividend and distribution payments, pro rata based on the number of common shares held, when, as and if declared by the board of directors, in its sole discretion. Any future dividends declared will be at the discretion of the board of directors and will depend upon our financial condition, earnings and other factors.

As a Bermuda exempted company, we are subject to Bermuda law relating to the payment of dividends. We may not pay any dividends if, at the time the dividend is declared or at the time the dividend is paid, there are reasonable grounds for believing that, after giving effect to that payment;

— we will not be able to pay our liabilities as they fall due; or

— the realizable value of our assets is less than our liabilities.

In addition, since we are a holding company with no material assets, and conduct our operations through subsidiaries, our ability to pay any dividends to shareholders will depend on our subsidiaries' distributing to us their earnings and cash flow. Some of our loan agreements currently limit or prohibit our subsidiaries' ability to make distributions to us and our ability to make distributions to our shareholders.

Oslo Stock Exchange. The Company's Bye-laws provide that any person, other than its registrar, who acquires or disposes of an interest in shares which triggers a notice requirement of the Oslo Stock Exchange must notify the Company's registrar immediately of such acquisition or disposal and the resulting interest of that person in shares.

The Company's Bye-law 39 requires the Company to provide notice to the Oslo Stock Exchange if a person (other than the Company's registrar) resident for tax purposes in Norway (or such other jurisdiction as the Board may nominate from time to time) is found to hold 50% or more of the Company's aggregate issued share capital, or holds shares with 50% or more of the outstanding voting power.

The Company's Bye-laws also require it to comply with requirements that the Oslo Stock Exchange may impose from time to time relating to notification of the Oslo Stock Exchange in the event of specified changes in the ownership of the Company's common shares.

Shares and preemptive rights. Subject to certain balance sheet restrictions, the Companies Act permits a company to purchase its own shares if it is able to do so without becoming cash flow insolvent as a result. The restrictions are that the par value of the share must be charged against the company's issued share capital account or a company fund which is available for dividend or distribution or be paid for out of the proceeds of a fresh issue of shares. Any premium paid on the repurchase of shares must be charged to the company's current share premium account or charged to a company fund which is available for dividend or distribution. The Companies Act does not impose any requirement that the directors shall make a general offer to all shareholders to purchase their shares pro rata to their respective shareholdings. The Company's Bye-Laws do not contain any specific rules regarding the procedures to be followed by the Company when purchasing its own shares, and consequently the primary source of the Company's obligations to shareholders when the Company tenders for its shares will be the rules of the listing exchanges on which the Company's shares are listed. The Company's power to purchase its own shares is covered by Bye-laws 9, 10 and 11.

The Companies Act and our Bye-Laws do not confer any pre-emptive, redemption, conversion or sinking fund rights attached to our common shares. Holders of common shares are entitled to one vote per share on all matters submitted to a vote of holders of common shares. Unless a different majority is required by law or by our Bye-laws, resolutions to be approved by holders of common shares require approval by a simple majority of votes cast at a meeting at which a quorum is present.

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Bye-Law 8 specifically provides that the issuance of more shares ranking pari passu with the shares in issue shall not constitute a variation of class rights, unless the rights attached to shares in issue state that the issuance of further shares shall constitute a variation of class rights. Bye-Law 12 confers on the directors the right to dispose of any number of unissued shares forming part of the authorized share capital of the Company without any requirement for shareholder approval. The Company's power to issue shares is covered by Bye-laws 12, 13, 14, 15 and 97. Bye-law 89 contains certain stipulations regarding the Company's (or any of its subsidiaries') transactions with any of its Principal Shareholders (or any Associate of a Principal Shareholder). When Bye-law 89 applies, the Company is required to send to each shareholder a disclosure statement containing information about the proposed transaction. However, this Bye-Law provision specifically exempts from this requirement the issuance of new shares to a Principal Shareholder for cash.

Liquidation. In the event of our liquidation, dissolution or winding up, the holders of common shares are entitled to share in our assets, if any, remaining after the payment of all of our debts and liabilities, subject to any liquidation preference on any outstanding preference shares.

Anti-Takeover Effects of Provisions of Our Constitutional Documents

Several provisions of our bye-laws may have anti-takeover effects. These provisions are intended to avoid costly takeover battles, lessen our vulnerability to a hostile change of control and enhance the ability of our board of directors to maximize shareholder value in connection with any unsolicited offer to acquire us. However, these anti-takeover provisions, which are summarized below, could also discourage, delay or prevent (1) the merger, amalgamation or acquisition of our company by means of a tender offer, a proxy contest or otherwise, that a shareholder may consider in its best interest and (2) the removal of our incumbent directors and executive officers.

Should a person or persons resident for tax purposes in Norway, other than Nordea Bank Norge ASA, become the holder of 50% or more of the aggregate of our issued and outstanding common stock, being held or owned directly or indirectly, we will be entitled to dispose of such number of shares that would reduce the person or persons ownership of our common stock to under 50%.

Where a person or entity becomes the owner of more than 30% of our issued and outstanding common stock, our board of directors can decline to register the acquired common shares in excess of 30% unless the acquirer makes an offer to purchase our remaining shares of common stock or agrees to sell part of the shares of common stock acquired to reduce the number of our common shares held by them to below 30% of our issued and outstanding common stock. Sale of the acquirer's shares over 30% of the issued and outstanding common stock must take place no later than two weeks from when his total share ownership rose above 30%, the acquisition date. Offers to purchase our remaining shares must occur within four weeks of the acquisition date and the offer price must be at least as high as the highest price paid by the acquirer in the six months prior to the acquisition date. Should the acquirer fail to reduce his common shares or make an offer for the outstanding common shares with the time period, the acquirer will not be able to exercise any rights associated with the shares in excess of 30% of our outstanding and issued common stock.

There is a statutory remedy under Section 111 of the Companies Act, which provides that a shareholder may seek redress in the Bermuda courts as long as such shareholder can establish that a company's affairs are being conducted, or have been conducted, in a manner oppressive or prejudicial to the interests of some part of the shareholders, including such shareholder.

C. MATERIAL CONTRACTS

The Company has no material contracts other than those entered in the ordinary course of business.

D. EXCHANGE CONTROLS

The Bermuda Monetary Authority, or the BMA, must give permission for all issuances and transfers of securities of a Bermuda exempted company like ours, unless the proposed transaction is exempted by the BMA's written general permissions. We have received general permission from the BMA to issue any unissued common shares and for the free transferability of our common shares as long as our common shares are listed on an "appointed stock exchange". Our common shares are listed on the Oslo Stock Exchange and the New York Stock Exchange, each of which is an "appointed stock exchange". Our common shares may therefore be freely transferred among persons who are residents and non-residents of Bermuda.

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Although we are incorporated in Bermuda, we are classified as a non-resident of Bermuda for exchange control purposes by the BMA. Other than transferring Bermuda Dollars out of Bermuda, there are no restrictions on our ability to transfer funds into and out of Bermuda or to pay dividends to U.S. residents who are holders of Common Shares or other non-residents of Bermuda who are holders of our common shares in currency other than Bermuda Dollars.

In accordance with Bermuda law, share certificates may be issued only in the names of corporations, individuals or legal persons. In the case of an applicant acting in a special capacity (for example, as an executor or trustee), certificates may, at the request of the applicant, record the capacity in which the applicant is acting. Notwithstanding the recording of any such special capacity, we are not bound to investigate or incur any responsibility in respect of the proper administration of any such estate or trust.

We will take no notice of any trust applicable to any of our shares or other securities whether or not we had notice of such trust.

As an "exempted company", we are exempt from Bermuda laws which restrict the percentage of share capital that may be held by non-Bermudians, but as an exempted company, we may not participate in certain business transactions including: (i) the acquisition or holding of land in Bermuda (except that required for its business and held by way of lease or tenancy for terms of not more than 21 years) without the express authorization of the Bermuda legislature; (ii) the taking of mortgages on land in Bermuda to secure an amount in excess of $50,000 without the consent of the Minister of Business Development and Tourism of Bermuda; (iii) the acquisition of any bonds or debentures secured on any land in Bermuda except bonds or debentures issued by the Government of Bermuda or by a public authority in Bermuda; or (iv) the carrying on of business of any kind in Bermuda, except in so far as may be necessary for the carrying on of its business outside Bermuda or under a license granted by the Minister of Business Development and Tourism of Bermuda.

The Bermuda government actively encourages foreign investment in "exempted" entities like us that are based in Bermuda but do not operate in competition with local business. In addition to having no restrictions on the degree of foreign ownership, we are subject neither to taxes on our income or dividends nor to any exchange controls in Bermuda. In addition, there is no capital gains tax in Bermuda, and profits can be accumulated by us, as required, without limitation. There is no income tax treaty between the United States and Bermuda pertaining to the taxation of income other than applicable to insurance enterprises.

E. TAXATION

The following is a discussion of the material Bermuda, United States federal income and other tax considerations with respect to the Company and holders of common stock. This discussion does not purport to deal with the tax consequences of owning common stock to all categories of investors, some of which, such as dealers in securities, investors whose functional currency is not the United States Dollars and investors that own, actually or under applicable constructive ownership rules, 10% or more of our common stock, may be subject to special rules. This discussion deals only with holders who hold the common stock as a capital asset, generally for investment purposes. Shareholders are encouraged to consult their own tax advisors concerning the overall tax consequences arising in their own particular situation under United States federal, state, local or foreign law of the ownership of common stock.

If an entity treated as a partnership for U.S. federal income tax purposes holds common stock, the U.S. federal income tax treatment of a partner will generally depend upon the status of the partner and upon the activities of the partnership.  Partners of partnerships holding the common stock are encouraged to consult their own tax advisors.

Bermuda and Other Non-United States Tax Considerations

As of the date of this Annual Report, we are not subject to taxation under the laws of Bermuda. Distributions we receive from our subsidiaries also are not subject to any Bermuda tax. As of the date of this Annual Report, there is no Bermuda income, corporation or profits tax, withholding tax, capital gains tax, capital transfer tax, or estate duty or inheritance tax payable by non-residents of Bermuda in respect of capital gains realized on a disposition of our common stock or in respect of distributions they receive from us with respect to our common stock. This discussion does not, however, apply to the taxation of persons ordinarily resident in Bermuda. Bermuda shareholders should consult their own tax advisors regarding possible Bermuda taxes with respect to dispositions of, and distributions on, our common stock.

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We have received from the Minister of Finance under The Exempted Undertaking Tax Protection Act 1966, as amended, an assurance that, in the event that Bermuda enacts legislation imposing tax computed on profits, income, any capital asset, gain or appreciation, or any tax in the nature of estate duty or inheritance, the imposition of any such tax shall not be applicable to us or to any of our operations or shares, debentures or other obligations, until March 31, 2035. This assurance is subject to the proviso that it is not to be construed to prevent the application of any tax or duty to such persons as are ordinarily resident in Bermuda or to prevent the application of any tax payable in accordance with the provisions of the Land Tax Act 1967.  The assurance does not exempt us from paying import duty on goods imported into Bermuda.  In addition, all entities employing individuals in Bermuda are required to pay a payroll tax and there are other sundry taxes payable, directly or indirectly, to the Bermuda government.  We and our subsidiaries incorporated in Bermuda pay annual government fees to the Bermuda government.

Bermuda currently has no tax treaties in place with other countries in relation to double-taxation or for the withholding of tax for foreign tax authorities.

Dividends distributed by Seadrill Limited out of Bermuda

Currently, there is no withholding tax payable in Bermuda on dividends distributed from Seadrill Limited to its shareholders.

Taxation of rig owning entities

The majority of our drilling rigs are owned in tax-free jurisdictions such as Bermuda, the Cayman Islands and Liberia. There is no taxation of the rig owners' income in these jurisdictions. The remaining drilling rigs are owned in jurisdictions with income or tonnage taxation of the rig owners' income. These jurisdictions are Hungary, Norway and Singapore.

Please also see the section below entitled "Taxation in country of drilling operations."

Taxation in country of drilling operations

Income derived from drilling operations is generally taxed in the country where these operations take place The taxation of income derived from drilling operations could be based on net income, deemed income, withholding taxes and or other bases, depending upon the applicable tax legislation in each country of operation.  Some countries levy withholding taxes on bareboat charter payments (internal rig rent), branch profits, crew, dividends, interest and management fees.

Drilling operations can be carried out by locally incorporated companies, foreign branches of operating companies or foreign branches of the rig owning entities. We elect the appropriate structure with due regard to the applicable legislation of each country where the drilling operations occur.

Taxation may also extend to the rig owning entity in some of the countries where the drilling operations are performed.

Net income

Net income corresponds to gross income derived from the drilling operations less tax-deductible costs (i.e. operating costs, crew, insurance, management fees and capital costs (internal bareboat fee; tax depreciation; interest costs) incurred in relation to those operations).  In addition to net income tax, withholding tax on branch profits, dividends, internal bareboat fees, among other items, may also be levied.

Net income taxation for an international drilling contractor is complex, and pricing of internal transactions (e.g., rig sales; bareboat fees; services) will allocate overall taxable income between the relevant countries. We apply Organization for Economic Cooperation and Development, or OECD, Transfer Pricing Guidelines as a basis to arrive at pricing for internal transactions. OECD Transfer Pricing Guidelines describe various methods to price internal services on terms believed by us to be no less favorable than are available from unaffiliated third parties. However, some tax authorities could disagree with our transfer pricing methods and disputes may arise in regards to correct pricing.

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Deemed income

Deemed income tax is normally calculated based on gross turnover, which can include or exclude reimbursables and often reflects an assumed profit ratio, multiplied by the applicable corporate tax rate. Some countries will also levy withholding taxes on the distribution of dividend and/or branch profits at the deemed tax rate.

Withholding and other taxes

Some countries base their taxation solely on withholding tax on gross turnover.  In addition, some countries levy stamp duties, training taxes or similar taxes on the gross turnover.

Customs duties

Customs duties are generally payable on the importation of drilling rigs, equipment and spare parts into the country of operation, although several countries provide exemption from such duties for the temporary importation of drilling rigs. Such exemption may also apply to the temporary importation of equipment.

Taxation of other income

Other income related to crewing, management fees and technical services will generally be taxed in the country where the service provider is resident, although withholding tax and/or income tax may also be imposed in the country where the drilling operations take place.

Dividends and other investment income will be taxable in accordance with the legislation of the country where the company holding the investment is resident. For companies resident in Bermuda, there is currently no tax on these types of income.

Some countries levy withholding taxes on outbound dividends and interest payments.

Capital gains taxation

In respect of drilling rigs located in Bermuda, the Cayman Islands, Liberia and Singapore, no capital gains tax is payable in these countries upon the sale or disposition of a rig. However, some countries may impose a capital gains tax or a claw-back of tax depreciation (on a full or partial basis) upon the sale of a rig during or attributable to such time as the rig is operating within such country, or within a certain time after completion of such drilling operations, or when the rig is exported after completion of such drilling operations.

Other taxes

Our operations may be subject to sales taxes, value added taxes, or other similar taxes in various countries.

Taxation of shareholders

Taxation of shareholders will depend upon the jurisdiction where the shareholder is a tax resident. Shareholders should seek advice from their tax advisor to determine the taxation to which they may be subject based on the shareholder's circumstances.

United States Federal Income Tax Considerations

The following are the material United States federal income tax consequences to us of our activities and to U.S. Holders and Non-U.S. Holders, each as defined below, of the ownership of our common stock.  This discussion does not purport to deal with the tax consequences of owning common stock to all categories of investors, some of which, such as dealers in securities, investors whose functional currency is not the United States Dollar and investors that own, actually or under applicable constructive ownership rules, 10% or more of our common stock, may be subject to special rules.  The following discussion of United States federal income tax matters is based on the United States Internal Revenue Code of 1986, as amended, or the Code, judicial decisions, administrative pronouncements, and existing and proposed regulations issued by the United States Department of the Treasury, or the Treasury Regulations, all of which are subject to change, possibly with retroactive effect.  The discussion below is based, in part, on the description of our business in this Annual Report and assumes that we conduct our business as described.  Unless otherwise noted, references in the following discussion to the "Company," "we" and "us" are to Seadrill Limited and its subsidiaries on a consolidated basis.

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United States Federal Income Taxation of U.S. Holders

As used herein, the term "U.S. Holder" means a beneficial owner of common stock that is a United States citizen or resident, United States corporation or other United States entity taxable as a corporation, an estate the income of which is subject to United States federal income taxation regardless of its source, or a trust if a court within the United States is able to exercise primary jurisdiction over the administration of the trust and one or more United States persons have the authority to control all substantial decisions of the trust.

If a partnership holds our common stock, the tax treatment of a partner will generally depend upon the status of the partner and upon the activities of the partnership. If you are a partner in a partnership holding our common stock, you are encouraged to consult your tax advisor.

Distributions

Subject to the discussion of passive foreign investment companies below, any distributions made by us with respect to our common stock to a U.S. Holder will generally constitute dividends, which may be taxable as ordinary income or "qualified dividend income" as described in more detail below, to the extent of our current or accumulated earnings and profits, as determined under United States federal income tax principles. Distributions in excess of our earnings and profits will be treated first as a nontaxable return of capital to the extent of the U.S. Holder's tax basis in his common stock on a dollar-for-dollar basis and thereafter as capital gain. Because we are not a United States corporation, U.S. Holders that are corporations will not be entitled to claim a dividends received deduction with respect to any distributions they receive from us. Dividends paid with respect to our common stock will generally be treated as "passive category income" or, in the case of certain types of U.S. Holders, "general category income" for purposes of computing allowable foreign tax credits for United States foreign tax credit purposes.

Dividends paid on our common stock to a U.S. Holder who is an individual, trust or estate, or a "U.S. Individual Holder" will generally be treated as "qualified dividend income" that is taxable to such U.S. Individual Holders at preferential tax rates provided that (1) the common stock is readily tradable on an established securities market in the United States (such as the New York Stock Exchange, on which our common stock is traded; (2) we are not a passive foreign investment company for the taxable year during which the dividend is paid or the immediately preceding taxable year (which, as discussed below, we are not and do not anticipate being in the future); (3) the U.S. Individual Holder has owned the common stock for more than 60 days in the 121-day period beginning 60 days before the date on which the common stock becomes ex-dividend; and (4) the U.S. Individual Holder is not under an obligation to make related payments with respect to positions in substantially similar or related property. There is no assurance that any dividends paid on our common stock will be eligible for these preferential rates in the hands of a U.S. Individual Holder. Any dividends paid by the Company which are not eligible for these preferential rates will be taxed as ordinary income to a U.S. Individual Holder.

Special rules may apply to any "extraordinary dividend", generally, a dividend paid by us in an amount which is equal to or in excess of 10% of a shareholder's adjusted tax basis (or fair market value in certain circumstances) in a share of common stock. If we pay an "extraordinary dividend" on our common stock that is treated as "qualified dividend income," then any loss derived by a U.S. Individual Holder from the sale or exchange of such common stock will be treated as long-term capital loss to the extent of such dividend.

Sale, Exchange or other Disposition of Common Stock

Assuming we do not constitute a passive foreign investment company for any taxable year, a U.S. Holder generally will recognize taxable gain or loss upon a sale, exchange or other disposition of our common stock in an amount equal to the difference between the amount realized by the U.S. Holder from such sale, exchange or other disposition and the U.S. Holder's tax basis in such stock. Such gain or loss will be treated as long-term capital gain or loss if the U.S. Holder's holding period is greater than one year at the time of the sale, exchange or other disposition. Such capital gain or loss will generally be treated as United States source income or loss, as applicable, for United States foreign tax credit purposes. A U.S. Holder's ability to deduct capital losses is subject to certain limitations.

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3.8% Tax on Net Investment Income

For taxable years beginning after December 31, 2012, a U.S. Holder that is an individual, estate, or, in certain cases, a trust, will generally be subject to a 3.8% tax on the lesser of (1) the U.S. Holder's net investment income for the taxable year and (2) the excess of the U.S. Holder's modified adjusted gross income for the taxable year over a certain threshold (which in the case of individuals is between $125,000 and $250,000).  A U.S. Holder's net investment income will generally include distributions made by us which constitute a dividend for U.S. federal income tax purposes and gain realized from the sale, exchange or other disposition of our common stock.  This tax is in addition to any income taxes due on such investment income.

If you are a U.S. Holder that is an individual, estate or trust, you are encouraged to consult your tax advisors regarding the applicability of the 3.8% tax on net investment income to the ownership and disposition of our common stock.

Passive Foreign Investment Company Status and Significant Tax Consequences

Special United States federal income tax rules apply to a U.S. Holder that holds stock in a foreign corporation classified as a passive foreign investment company, or PFIC, for United States federal income tax purposes. In general, a foreign corporation will be treated as a PFIC with respect to a United States shareholder, if, for any taxable year in which such shareholder holds stock in such foreign corporation, either:

· at least 75% of the corporation's gross income for such taxable year consists of passive income (e.g. dividends, interest, capital gains and rents derived other than in the active conduct of a rental business); or

· at least 50% of the average value of the assets held by the corporation during such taxable year produce, or are held for the production of, passive income.

For purposes of determining whether a foreign corporation is a PFIC, it will be treated as earning and owning its proportionate share of the income and assets, respectively, of any of its subsidiary corporations in which it owns at least 25% of the value of the subsidiary's stock.

Income earned by a foreign corporation in connection with the performance of services would not constitute passive income. By contrast, rental income would generally constitute "passive income" unless the foreign corporation is treated under specific rules as deriving its rental income in the active conduct of a trade or business or is received from a related party.

We presently believe that we are not a PFIC and do not anticipate becoming a PFIC.  This is, however, a factual determination made on an annual basis and is subject to change.  Therefore, we can give you no assurance as to our PFIC status.

As discussed more fully below, if we were to be treated as a PFIC for any taxable year, a U.S. Holder would be subject to different United States federal income taxation rules depending on whether the U.S. Holder makes an election to treat us as a "Qualified Electing Fund," which election we refer to as a "QEF election." As an alternative to making a QEF election, a U.S. Holder should be able to make a "mark-to-market" election with respect to our common stock, as discussed below. In addition, if we were to be treated as a PFIC for any taxable year after 2010, a U.S. Holder would be required to file an annual report with the United States Internal Revenue Service, or the IRS, for that year with respect to such U.S. Holder's common stock.

Taxation of U.S. Holders Making a Timely QEF Election

If a U.S. Holder makes a timely QEF election, which U.S. Holder we refer to as an "Electing Holder," the Electing Holder must report each year for United States federal income tax purposes his pro rata share of our ordinary earnings and our net capital gain, if any, for our taxable year that ends with or within the taxable year of the Electing Holder, regardless of whether or not distributions were received from us by the Electing Holder. The Electing Holder's adjusted tax basis in the common stock would be increased to reflect taxed but undistributed earnings and profits. Distributions of earnings and profits that had been previously taxed would result in a corresponding reduction in the adjusted tax basis in the common stock and would not be taxed again once distributed. An Electing Holder would generally recognize capital gain or loss on the sale, exchange or other disposition of our common stock. A U.S. Holder would make a QEF election with respect to any taxable year during which the Company is a PFIC by filing IRS Form 8621 with his United States federal income tax return. If we were aware that we or any of our subsidiaries were to be treated as a PFIC for any taxable year, we would, if possible, provide each U.S. Holder with all necessary information in order to make the QEF election described above.  If we were to be treated as a PFIC, a U.S. Holder would be treated as owning his proportionate share of stock in each of our subsidiaries which is treated as a PFIC and a separate QEF election would be necessary with respect to each subsidiary.  It should be noted that we may not be able to provide such information if we did not become aware of our status as a PFIC in a timely manner.

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Taxation of U.S. Holders Making a "Mark-to-Market" Election

Alternatively, if we were to be treated as a PFIC for any taxable year and, as we anticipate, our stock is treated as "marketable stock," a U.S. Holder would be allowed to make a "mark-to-market" election with respect to our common stock, provided the U.S. Holder completes and files IRS Form 8621 in accordance with the relevant instructions and related Treasury Regulations.  The "mark-to-market" election will not be available for any of our subsidiaries. If that election is made, the U.S. Holder generally would include as ordinary income in each taxable year the excess, if any, of the fair market value of the common stock at the end of the taxable year over such holder's adjusted tax basis in the common stock. The U.S. Holder would also be permitted an ordinary loss in respect of the excess, if any, of the U.S. Holder's adjusted tax basis in the common stock over its fair market value at the end of the taxable year, but only to the extent of the net amount previously included in income as a result of the mark-to-market election. A U.S. Holder's tax basis in his common stock would be adjusted to reflect any such income or loss amount. Gain realized on the sale, exchange or other disposition of our common stock would be treated as ordinary income, and any loss realized on the sale, exchange or other disposition of the common stock would be treated as ordinary loss to the extent that such loss does not exceed the net mark-to-market gains previously included as ordinary income by the U.S. Holder.  It should be noted that the mark-to-market election would likely not be available for any of our subsidiaries which are treated as PFICs.

Taxation of U.S. Holders Not Making a Timely QEF or Mark-to-Market Election

Finally, if we were to be treated as a PFIC for any taxable year, a U.S. Holder who does not make either a QEF election or a "mark-to-market" election for that year, whom we refer to as a "Non-Electing Holder," would be subject to special rules with respect to (1) any excess distribution (i.e., the portion of any distributions received by the Non-Electing Holder on our common stock in a taxable year in excess of 125% of the average annual distributions received by the Non-Electing Holder in the three preceding taxable years, or, if shorter, the Non-Electing Holder's holding period for the common stock), and (2) any gain realized on the sale, exchange or other disposition of our common stock. Under these special rules:

— the excess distribution or gain would be allocated ratably over the Non-Electing Holders' aggregate holding period for the common stock;

— the amount allocated to the current taxable year and any taxable year before we became a PFIC would be taxed as ordinary income; and

— the amount allocated to each of the other taxable years would be subject to tax at the highest rate of tax in effect for the applicable class of taxpayer for that year, and an interest charge for the deemed deferral benefit would be imposed with respect to the resulting tax attributable to each such other taxable year.

These penalties would not apply to a pension or profit sharing trust or other tax-exempt organization that did not borrow funds or otherwise utilize leverage in connection with its acquisition of our common stock. If a Non-Electing Holder who is an individual dies while owning our common stock, such Non-Electing Holder's successor generally would not receive a step-up in tax basis with respect to such common stock.

United States Federal Income Taxation of "Non-U.S. Holders"

A beneficial owner of our common stock that is not a U.S. Holder is referred to herein as a "Non-U.S. Holder."

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Dividends on Common Stock

Non-U.S. Holders generally will not be subject to United States federal income tax or withholding tax on dividends received from us with respect to our common stock, unless that income is effectively connected with the Non-U.S. Holder's conduct of a trade or business in the United States. If the Non-U.S. Holder is entitled to the benefits of a United States income tax treaty with respect to those dividends, that income is subject to United States federal income tax only if it is attributable to a permanent establishment maintained by the Non-U.S. Holder in the United States.

Sale, Exchange or Other Disposition of Common Stock

Non-U.S. Holders generally will not be subject to United States federal income tax or withholding tax on any gain realized upon the sale, exchange or other disposition of our common stock, unless:

— the gain is effectively connected with the Non-U.S. Holder's conduct of a trade or business in the United States. If the Non-U.S. Holder is entitled to the benefits of a United States income tax treaty with respect to that gain, that gain is subject to United States federal Income tax only if it is attributable to a permanent establishment maintained by the Non-U.S. Holder in the United States; or

— the Non-U.S. Holder is an individual who is present in the United States for 183 days or more during the taxable year of disposition and other conditions are met.

If a Non-U.S. Holder is engaged in a United States trade or business for United States federal income tax purposes, the income from the common stock, including dividends and the gain from the sale, exchange or other disposition of the common stock that is effectively connected with the conduct of that United States trade or business will generally be subject to United States federal income tax in the same manner as discussed in the previous section relating to the United States federal income taxation of U.S. Holders. In addition, if the Non-U.S. Holder is a corporation, the Non-U.S. Holder's earnings and profits that are attributable to the effectively connected income, subject to certain adjustments, may be subject to an additional United States federal branch profits tax at a rate of 30%, or at a lower rate as may be specified by an applicable United States income tax treaty.

Backup Withholding and Information Reporting

In general, dividend payments, and other taxable distributions, made by the Company to you within the United States will be subject to information reporting requirements. Such payments will also be subject to backup withholding if paid to a U.S. Individual Holder who:

— fails to provide an accurate taxpayer identification number;

— is notified by the IRS that he has failed to report all interest or dividends required to be shown on his United States federal income tax returns; or

— in certain circumstances, fails to comply with applicable certification requirements.

Non-U.S. Holders may be required to establish their exemption from information reporting and backup withholding by certifying their status on IRS Form W-8BEN, W-8ECI or W-8IMY, as applicable.

If a Non-U.S. Holder sells his common stock to or through a United States office of a  broker, the payment of the proceeds is subject to both United States backup withholding and information reporting unless the Non-U.S. Holder certifies that he is a non-United States person, under penalties of perjury, or otherwise establishes an exemption. If a Non-U.S. Holder sells his common stock through a non-United States office of a non-United States broker and the sales proceeds are paid to the Non-U.S. Holder outside the United States then information reporting and backup withholding generally will not apply to that payment.  However, United States information reporting requirements, but not backup withholding, will apply to a payment of sales proceeds, even if that payment is made to a Non-U.S. Holder outside the United States, if the Non-U.S. Holder sells his common stock through a non-United States office of a broker that is a United States person or has some other contacts with the United States.

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Backup withholding is not an additional tax.  Rather, a taxpayer generally may obtain a refund of any amounts withheld under backup withholding rules that exceed the taxpayer's United States federal income tax liability by filing a refund claim with the IRS.

Pursuant to recently enacted section 6038D of the Code and the proposed and temporary Treasury Regulations promulgated there under, individuals who are U.S. Holders (and to the extent specified in the applicable Treasury Regulations, certain individuals who are non-U.S. Holders and certain U.S. entities) who hold "specified foreign financial assets" (as defined in section 6038D of the Code and the applicable Treasury Regulations) are required to file IRS Form 8938 (Statement of Specified Foreign Financial Assets) with information relating to each such asset for each taxable year in which the aggregate value of all such assets exceeds $75,000 at any time during the taxable year or $50,000 on the last day of the taxable year.  Specified foreign financial assets would include, among other assets, our common stock, unless the common stock were held through an account maintained with a U.S. financial institution.  Substantial penalties apply to any failure to timely file IRS Form 8938, unless the failure is shown to be due to reasonable cause and not due to willful neglect.  Additionally, the statute of limitations on the assessment and collection of U.S. federal income tax with respect to a taxable year for which the filing of IRS Form 8938 is required may not close until three years after the date on which IRS Form 8938 is filed.  U.S. Holders (including U.S. entities) and Non-U.S. Holders are encouraged to consult their own tax advisors regarding their reporting obligations under section 6038D of the Code.

Other Tax Considerations

In addition to the tax consequences discussed above, we may be subject to tax in one or more other jurisdictions where we conduct activities.  The amount of any such tax imposed upon our operations may be material.

F. DIVIDENDS AND PAYING AGENTS

Not applicable.

G. STATEMENT BY EXPERTS

Not applicable.

H. DOCUMENTS ON DISPLAY

We are subject to the informational requirements of the Securities Exchange Act of 1934, as amended, or the Exchange Act. In accordance with these requirements we file reports and other information with the Commission. These materials, including this Annual Report on Form 20-F and the accompanying exhibits, may be inspected and copied at the public reference facilities maintained by the Commission at 100 F Street, NE, Room 1580, Washington, D.C. 20549.  You may obtain information on the operation of the public reference room by calling 1 (800) SEC-0330, and you may obtain copies at prescribed rates from the Public Reference Section of the Commission at its principal office in Washington, D.C.  The Commission maintains a website (http://www.sec.gov.) that contains reports, proxy and information statements and other information regarding registrants that file electronically with the Commission. In addition, documents referred to in this Annual Report on Form 20-F may be inspected at our principle executive offices at Par-la-Ville Place, 14 Par-la-Ville Road, Hamilton, Bermuda HM 08 and at the offices of Seadrill Management Ltd., at Building 3, Chiswick Park, 566 Chiswick High Road, London, W4 5YA, United Kingdom.

I. SUBSIDIARY INFORMATION

Not applicable

ITEM 11.                    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to various market risks, including foreign currency fluctuations, changes in interest rates, equity and credit risk. Our policy is to hedge our exposure to these risks where possible, within boundaries deemed appropriate by management. We accomplish this by entering into a variety of derivative instruments and contracts to maintain the desired level of risk exposure. We may enter into derivative instruments from time to time for speculative purposes.

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Foreign Exchange Risk

The Company and the majority of its subsidiaries use the U.S. dollar as their functional currency because the majority of their revenues and expenses are denominated in U.S. dollars. Accordingly, the Company's reporting currency is also U.S. dollars. We do, however, earn revenue and incur expenses in other currencies and there is thus a risk that currency fluctuations could have an adverse effect on the value of our cash flows.

Our foreign currency risk arises from:

— the measurement of debt and other monetary assets and liabilities denominated in foreign currencies converted to U.S. dollars, with the resulting gain or loss recorded as "Other financial items";

— changes in the fair value of foreign currency forward contracts, which are recorded as "Other financial items";

— the impact of fluctuations in exchange rates on the reported amounts of our revenues and expenses which are contracted in foreign currencies; and

— foreign subsidiaries whose accounts are not maintained in U.S. dollars, which when converted into U.S. dollars can result in exchange adjustments which are recorded as a component in shareholders' equity.

We use foreign currency forward contracts and cross currency interest rate swaps to manage our exposure to foreign currency risk on certain assets, liabilities and future anticipated transactions. Such derivative contracts do not qualify for hedge accounting treatment and are recorded in the balance sheet under "Other current assets" if the contracts have a net positive fair value, and under "Other current liabilities" if the contracts have a net negative fair value, with changes in the fair value recorded in the statement of operations under "Other financial items."

At December 31, 2012, we had various contracts to sell approximately $528 million between January 2013 and February 2014 for Norwegian Kroner at exchange rates ranging from NOK/$5.64 to NOK/$5.79. The fair value of our currency forward contracts and cross currency interest rate swap contracts as of December 31, 2012, and December 31, 2011, was as follows:

	December 31, 2012				December 31, 2011
(In millions of U.S. dollars)	Notional Amount		Fair value		Notional Amount		Fair Value
Other current assets (liabilities)		528		11		264		(1)

A 1% change in the exchange rate between the U.S. dollar and the bought forward currencies would result in a fair value gain or loss of $5 million that would be reflected in our Consolidated Statements of Operations, based on our currency forward contracts as of December 31, 2012.

Interest Rate Risk

A significant portion of our debt obligations and surplus funds placed with financial institutions are subject to movements in interest rates. It is our policy to obtain the most favorable interest rates available without increasing our foreign currency exposure. In keeping with this, our surplus funds are placed in fixed deposits with reputable financial institutions which yield better returns than bank deposits. The deposits generally have short-term maturities so as to provide us with the flexibility to meet working capital and capital investments.

We use interest rate swaps to manage our exposure to interest rate risks. Interest rate swaps are used to convert floating rate debt obligations to a fixed rate in order to achieve an overall desired position of fixed and floating rate debt. The extent to which interest rate swaps are used is determined by reference to our net debt exposure and our views regarding future interest rates. Most of our interest rate swaps do not qualify for hedge accounting and movements in their fair values are reflected in the statement of operations under "gain/(loss) on derivative financial instruments". Interest rate swap agreements that have a positive fair value are recorded as "Other current assets", while swaps with a negative fair value are recorded as "Other current liabilities".

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As of December 31, 2012, we were party to interest rate swap agreements with a combined outstanding principal amount of approximately $6.1 billion, as compared to $4.7 billion in 2011, at rates between 0.7390% per annum and 4.63% per annum. The swap agreements mature between March 2014 and December 2022. The fair values of our interest rate swaps as of December 31, 2012, and December 31, 2011, were as follows:

	December 31, 2012					December 31, 2011
(In millions of U.S. dollars)	Outstanding principal		Fair value			Outstanding principal		Fair Value
Other current assets (liabilities)		6,148		(384	)		4,738		(347	)

In addition to the above interest rate swaps, one of our fully-consolidated VIEs has executed interest rate cash flow hedges in the form of interest rate swaps. Movements in their fair value are reflected in "Accumulated other comprehensive income (loss)", with their fair value recorded as "Other current assets" or "Other current liabilities". As of December 31, 2012, the fully-consolidated VIEs had entered into interest rate swap agreements with a combined outstanding principal amount of $446 million, as compared to $1 billion in 2011, at a rate of 2.19% per annum. This swap agreements matures in August 2013, and its fair values as of December 31, 2012, and December 31, 2011, were as follows

	December 31, 2012				December 31, 2011
(In millions of U.S. dollars)	Outstanding principal		Fair value		Outstanding principal		Fair Value
Other current assets (liabilities)		446		8		988		(26	)

As of December 31, 2012, our net exposure to floating interest rate fluctuations on our outstanding debt was $1.8 billion, compared with $2.7 billion as of December 31, 2011, based on our total net interest bearing debt of $11 billion less the $6.6 billion notional principal of our floating to fixed interest rate swaps, less the $2.6 billion in fixed interest loans. A 1% change in short-term interest rates would thus increase or decrease our interest expense by approximately $18 million on an annual basis as of December 31, 2012, as compared to $27 million in 2011.

Equity risk

As of December 31, 2011, we had entered into a TRS contract indexed to 2,000,000 of our own shares, whereby we carry the risk of fluctuations in the market price of our shares. The settlement amount for the contract will be (A) the market value of the shares at the date of settlement plus the amount of dividends paid on the shares by us between entering into and settling the contract, less (B) the reference price of the shares agreed at the inception of the contract plus the counterparty's financing costs. Settlement will be either a payment from or to the counterparty, depending on whether (A) is more or less than (B). The contract was scheduled to expire in March 2013 and the agreed reference price was NOK220.32 per common share. The open position at December 31, 2012, exposes us to market risk associated with our share price, and it is estimated that a 10% reduction in the price below the value at December 31, 2012, would generate an adverse fair value adjustment of up to $7.3 million, which would be recorded in the Statement of Operations.

In March 2013, these contracts were settled and we simultaneously entered into a new TRS agreement for 2,000,000 of our common shares as underlying security with an agreed reference price of NOK213.17 per share and an expiration date in June 2013.

In addition to the above TRS agreement, which has our own share as underlying security, we may from time to time enter into short-term TRS arrangements relating to securities in other companies.

The fair market value of our $650 million 3.375% convertible bond as of December 31, 2012 was $872 million.

We hold equity investments in several other companies in our industry that own and/or operate offshore drilling units with similar characteristics to our own fleet of rigs or deliver various oil services. These investments provide us with additional exposure to market segments in which we operate or other oil services. As at December 31, 2012, these included:

— a 39.9% equity interest in the Archer Limited (OSE:ARCHER), a Bermuda oil service company;

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— a 6.4% equity interest in SapuraKencana, a Malaysian oil services company;

— a 49.0% equity interest in Varia Perdana Sdn Bhd, or Varia Perdana, a Malaysian company;

— a 66.2% equity interest in Asia Offshore Drilling Ltd. (OSE: AOD), a Bermuda offshore drilling company; and

— a 28.5% equity interest in Sevan Drilling ASA (OSE: SEVDR), a Norwegian offshore drilling company.

— a 49.0% equity interest in Tioman, a Malaysian well-service provider owned by SapuraKencana

— a 50% equity interest in Seabras Participacoes SA, a Brazilian vessel-owning company of one pipelying vessel currently under construction.

— a 50% equity interest in Seabras Sapura Holdco Ltd, a Bermuda vessel-owning company of two pipelying vessels currently under construction.

— a 30% equity interest in Itaunas, a Holland vessel-owning company of one drillship currently under construction.

— a 30% equity interest in Camburi, a Holland vessel-owning company of one drillship currently under construction.

— a 30% equity interest in Sahy, a Holland vessel-owning company of one drillship currently under construction.

If the market value of any of these investments should fall below the recorded book value, and this decrease in market value is determined to be other than temporary, there could be an impairment charge recognized in our profit and loss statement.

Please see Notes 13 and 16 to our Consolidated Financial Statements included in this Annual Report.

Concentration of credit risk

The market for our services is the offshore oil and gas industry, and the customers consist primarily of major integrated oil companies, independent oil and gas producers and government-owned oil companies. We perform ongoing credit evaluations of our customers and generally do not require collateral in our business agreements. Reserves for potential credit losses are maintained when necessary.

The following table shows those of our customers who have generated 10% or more of our contract revenues in one of the periods shown:

	Year ended December 31,
Customer	2012			2011			2010
Petrobras		15	%		17	%		17	%
Statoil		9	%		7	%		15	%
Total		14	%		15	%		10	%
Shell		10	%		10	%		9	%
Exxon		11	%		10	%		7	%
Other customers		41	%		41	%		42	%
Total		100	%		100	%		100	%

We may also face credit related losses in the event that counterparties to our derivative financial instrument contracts do not perform according to the terms of the contract. The credit risk arising from these counterparties relates to unrealized profits from foreign exchange forward contracts and interest rate swaps. We generally do not require collateral for our financial instrument contracts. We do, however, enter into master netting agreements with our counterparties to derivative financial instrument contracts to mitigate our exposure to counterparty credit risks. These agreements provide us with the legal right to discharge all or a portion of amounts owed to a counterparty by offsetting against them any amounts that the counterparty may owe us.

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In the opinion of management, our counterparties are creditworthy financial institutions, and we do not expect any significant loss to result from their non-performance. The credit exposure of interest rate swap agreements, currency option contracts and foreign currency contracts is represented by the fair value of contracts with a positive fair value at the end of each period, reduced by the effects of master netting agreements.

ITEM 12. DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES

A. DEBT SECURITIES

Not applicable.

B. WARRANTS AND RIGHTS

Not applicable.

C. OTHER SECURITIES

Not applicable.

D. AMERICAN DEPOSITORY SHARES

Not applicable.

PART II

ITEM 13. DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES

Neither we nor any of our subsidiaries have been subject to a material default in the payment of principal, interest, a sinking fund or purchase fund installment or any other material default that was not cured within 30 days. In addition, the payments of our dividends are not and have not been in arrears, or have not been subject to material delinquency that was not cured within 30 days.

ITEM 14. MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS

None.

ITEM 15 CONTROLS AND PROCEDURES

a) Disclosure Controls and Procedures

Management assessed the effectiveness of the design and operation of the Company's disclosure controls and procedures pursuant to Rule13a-15(e) of the Exchange Act as of December 31, 2012. Based upon that evaluation the Principal Executive Officer and Principal Financial Officer concluded that the Company's disclosure controls and procedures are effective as of the evaluation date.

b) Management's annual report on internal controls over financial reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) promulgated under the Exchange Act.

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Internal control over financial reporting is defined in Rule 13a-15(f) or 15d-15(f) promulgated under the Exchange Act as a process designed by, or under the supervision of, the Company's principal executive and principal financial officers and effected by the Company's board of directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles and includes those policies and procedures that:

— Pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company;

— Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of Company's management and directors; and

— Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree or compliance with the policies or procedures may deteriorate.

Management conducted the evaluation of the effectiveness of the internal controls over financial reporting using the control criteria framework issued by the Committee of Sponsoring Organizations of the Treadway Commission, or COSO, published in its report entitled Internal Control-Integrated Framework.

Our management with the participation of our Principal Executive Officer and Principal Financial Officer assessed the effectiveness of the design and operation of the Company's internal controls over financial reporting pursuant to Rule 13a-15 of the Exchange Act as of December 31, 2012. Based upon that evaluation, management, including the Principal Executive Officer and Principal Financial Officer, concluded that the Company's internal controls over financial reporting are effective as of December 31, 2012.

The effectiveness of the Company's internal control over financial reporting as of December 31, 2012 has been audited by PricewaterhouseCoopers AS, an independent registered public accounting firm, as stated in their report which appears herein.

c) Attestation report of the registered public accounting firm

The independent registered public accounting firm that audited the Consolidated Financial Statements, PricewaterhouseCoopers AS, has issued an attestation report on the effectiveness of the Company's internal control over financial reporting as of December 31, 2012, appearing under Item 18, and such report is incorporated herein by reference.

d) Changes in internal control over financial reporting

There were no changes in our internal controls over financial reporting that occurred during the period covered by this Annual Report that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

ITEM 16. RESERVED

ITEM 16A. AUDIT COMMITTEE FINANCIAL EXPERT.

Our Board of Directors has determined that the sole member of the audit committee, Kate Blankenship, is an independent Director and is the Audit Committee Financial Expert.

ITEM 16B. CODE OF ETHICS

We have adopted a Code of Ethics that applies to all entities controlled by the Company and its employees, directors, officers and agents of the Company. We have posted a copy of our Code of Ethics on our website at www.seadrill.com. We will provide any person, free of charge, a copy of our Code of Ethics upon written request to our registered office.

86

ITEM 16C. PRINCIPAL ACCOUNTANT FEES AND SERVICES

Our principal account for the fiscal years ended December 31, 2012 and 2011 was PricewaterhouseCoopers AS. The following table sets forth the fees related to audit and other services provided by PricewaterhouseCoopers AS:

(in U.S. dollars)	2012		2011
Audit fees (a)		5,518,180		3,610,668
Audit-related fees (b)		-		522,618
Taxation fees (c)		5,181		68,977
All other fees (d)		329,788		54,746
Total		5,853,149		4,257,010

a) Audit fees

Audit fees represent professional services rendered for the audit of our annual financial statements and services provided by the principal accountant in connection with statutory and regulatory filings or engagements.

b) Audit-related fees

Audit-related fees consist of assurance and related services rendered by the principal accountant related to the performance of the audit or review of our financial statements which have not been reported under Audit fees above.

c) Taxation fees

Taxation fees represent fees for professional services rendered by the principal accountant for tax compliance, tax advice and tax planning.

d) All other fees

All other fees include services other than audit fees, audit-related fees and taxation fees set forth above.

e) Audit Committee's Pre-Approval Policies and Procedures

Our Board of Directors has adopted pre-approval policies and procedures in compliance with paragraph (c)(7)(i) of Rule 2-01 of Regulation S-X that require the Board to approve the appointment of our independent auditor before such auditor is engaged, and approve each of the audit and non-audit related services to be provided by such auditor under such engagement by the Company. All services provided by the principal auditor in 2012, 2011 and 2010 were approved by the Board pursuant to the pre-approval policy.

ITEM 16D. EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES

Not applicable.

ITEM 16E. PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS

A share repurchase program was approved by the Board in 2007, authorizing us to buy back shares which may either be cancelled or held as treasury shares to meet our obligations relating to our share option scheme.

There were no shares repurchased during 2012.

87

ITEM 16F. CHANGE IN REGISTRANT'S CERTIFYING ACCOUNTANT

Not applicable.

ITEM 16G. CORPORATE GOVERNANCE

Pursuant to an exception under the NYSE listing standards available to foreign private issuers, we are not required to comply with all of the corporate governance practices followed by U.S. companies under the NYSE listing standards, which are available at www.nyse.com.  Pursuant to Section 303.A.11 of the NYSE Listed Company Manual, we are required to list the significant differences between our corporate governance practices and the NYSE standards applicable to listed U.S. companies. Set forth below is a list of those differences:

— Independence of Directors. The NYSErequires that a U.S. listed company maintain a majority of independent directors. As permitted under Bermuda law and our bye-laws, two members of our board of directors, Ms. Kate Blankenship and Mr. Carl Steen, are independent according to the NYSE's standards for independence applicable to a foreign private issuer.

— Executive Sessions.  The NYSErequires that non-management directors meet regularly in executive sessions without management. The NYSEalso requires that all independent directors meet in an executive session at least once a year. As permitted under Bermuda law and our bye-laws, our non-management directors do not regularly hold executive sessions without management and we do not expect them to do so in the future.

— Nominating/Corporate Governance Committee.  The NYSErequires that a listed U.S. company have a nominating/corporate governance committee of independent directors and a committee charter specifying the purpose, duties and evaluation procedures of the committee. As permitted under Bermuda law and our bye-laws, we do not currently have a nominating or corporate governance committee.

— Audit Committee.  The NYSErequires, among other things, that a listed U.S. company have an audit committee with a minimum of three members, all of whom are independent. As permitted by Rule 10A-3 under the Exchange Act, our audit committee consists of one independent member of our Board, Ms. Kate Blankenship.

— Corporate Governance Guidelines.  The NYSErequires that a listed U.S. Company adopt and disclose corporate governance guidelines. The guidelines must address, among other things: director qualification standards, director responsibilities, director access to management and independent advisers, director compensation, director orientation and continuing education, management succession and an annual performance evaluation. We are not required to adopt such guidelines under Bermuda law and we have not adopted such guidelines.

We believe that our established corporate governance practices satisfy the NYSE listing standards.

ITEM 16H. MINE SAFETY DISCLOSURE.

Not applicable.

88

PART III

ITEM 17.                   FINANCIAL STATEMENTS

Not applicable, see Item 18 for the Financial Statements.

ITEM 18. FINANCIAL STATEMENTS

The following financial statements listed below and set forth on pages F-1 through F-50 are filed as part of this Annual Report on Form 20-F:

Consolidated Financial Statements of Seadrill Limited
Index to Consolidated Financial Statements of Seadrill Limited	F-1
Report of Independent Registered Public Accounting Firm – PricewaterhouseCoopers AS	F-2
Consolidated Statements of Operations for the years ended December 31 2012, 2011 and 2010	F-3
Consolidated Statements of Comprehensive Income for the years ended December 31 2012, 2011 and 2010	F-4
Consolidated Balance Sheets as of December 31 2012 and 2011	F-5
Consolidated Statements of Cash Flows for the years ended December 31 2012, 2011 and 2010	F-6
Consolidated Statements of Changes in Shareholders' Equity for the years ended December 31 2012, 2011 and 2010	F-8
Notes to Consolidated Financial Statements	F-9

ITEM 19.	EXHIBITS
Exhibit Number	Description
1.1	Memorandum of Association of Seadrill Limited (1)
1.2	Bye-Laws of Seadrill Limited as adopted by the sole shareholder on May 13, 2005 and as amended by resolution of the shareholders at the Annual General Meeting held on December 1, 2006 and as further amended by resolution of the shareholders at the Annual General Meeting held on September 28, 2007 (1)
1.3	Certificate of Incorporation of Seadrill Limited delivered May 10, 2005 (1)
1.4	Certificate of Deposit of Memorandum of Increase of Share Capital delivered May 13, 2005 (1)
1.5	Certificate of Deposit of Memorandum of Increase of Share Capital delivered August 8, 2005 (1)
1.6	Certificate of Deposit of Memorandum of Increase of Share Capital delivered December 20, 2006 (1)
1.7	Certificate of Incorporation on Name Change delivered December 20, 2006 (1)
2.1	Form of Common Stock Certificate (1)
4.1	Share Option Scheme dated December 1, 2006 (1)
4.2	Bermuda Tax Assurance (1)
8.1	Subsidiaries of the Company
11.1	Code of Ethics (2)
12.1	Certification of the Principal Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended
12.2	Certification of the Principal Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended
12.3	Certification of the Principal Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended
13.1	Certification of the Principal Executive Officer pursuant to 18 USC Section 1350, as adopted, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
13.2	Certification of the Principal Financial Officer pursuant to 18 USC Section 1350, as adopted, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
13.3	Certification of the Principal Financial Officer pursuant to 18 USC Section 1350, as adopted, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

(1) Incorporated by reference to the Company's registration statement on Form 20-F, filed on March 18, 2010

(2) Incorporated by reference to the Company's annual report on Form 20-F, filed on May 5, 2010

89

Index to Consolidated Financial Statements of Seadrill Limited

Report of Independent Registered Public Accounting Firm	F-2
Consolidated Statements of Operations for the years ended December 31, 2012, 2011, and 2010	F-3
Consolidated Statements of Comprehensive Income for the years ended December 31, 2012, 2011, and 2010	F-4
Consolidated Balance Sheets as of December 31, 2012 and 2011	F-5
Consolidated Statements of Cash flows for the years ended December 31, 2012, 2011, and 2010	F-6
Consolidated Statements of Changes in Equity for the years ended December 31, 2012, 2011, and 2010	F-8
Notes to Consolidated Financial Statements	F-9

F-1

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of Seadrill Limited

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of operations, consolidated statements of cash flows, consolidated statements of comprehensive income and consolidated statements of changes in equity present fairly, in all material respects, the financial position of Seadrill Limited and its subsidiariesat December 31, 2012 and 2011, and the results of their operations and their cash flows for each of the three  years in the period ended December 31, 2012 in conformity with accounting principles generally accepted in the United States of America.  Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management's annual report on internal control over financial reporting appearing under item 15(b) of Seadrill Limited's Annual Report on Form 20-F. Our responsibility is to express opinions on these financial statements and on the Company's internal control over financial reporting based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States).  Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects.  Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation.  Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk.  Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.  A company's internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements.  Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/PricewaterhouseCoopers AS

PricewaterhouseCoopers AS

Oslo, Norway

April 30, 2013

F-2

Seadrill Limited

CONSOLIDATED STATEMENTS OF OPERATIONS

for the years ended December 31, 2012, 2011 and 2010

(In US$ millions, except per share data)

	2012		2011		2010
Operating revenues
Contract revenues		4,295		4,095		3,823
Reimbursables		180		96		192
Other revenues		3		1		26
Total operating revenues		4,478		4,192		4,041
Gain on sale of assets		-		22		26
Operating expenses
Vessel and rig operating expenses		1,656		1,585		1,605
Reimbursable expenses		166		90		179
Depreciation and amortization		615		563		480
General and administrative expenses		250		202		178
Total operating expenses		2,687		2,440		2,442
Net operating income		1,791		1,774		1,625
Financial items
Interest income		25		21		42
Interest expense		(340)		(295)		(312)
Share in results from associated companies (loss)/gain		(220)		(420)		48
Impairment loss on marketable securities		-		(10)		(15)
Gain/ (loss) on derivative financial instruments		3		(346)		(92)
Gain on re-measurement of previously held equity interest		-		-		111
Gain on decline in ownership interest		169		-		-
Gain on bargain purchase		-		-		56
Loss on debt extinguishment		-		-		(145)
Foreign exchange (loss)		(70)		(18)		(26)
Gain on loss of control in subsidiary		-		540		-
Gain on realization of marketable securities		85		416		-
Other financial items		(6)		9		39
Total financial items		(354)		(103)		(294)
Income before income taxes		1,437		1,671		1,331
Income taxes		(232)		(189)		(159)
Net income		1,205		1,482		1,172
Net income attributable to the non-controlling interest		97		81		55
Net income attributable to the parent		1,108		1,401		1,117
Basic earnings per share (U.S. dollar)		2.37		3.05		2.73
Diluted earnings  per share (U.S. dollar)		2.34		2.96		2.73
Declared regular dividend per share (U.S. dollar)		2.54		3.06		2.535
Declared extraordinary dividend per share (U.S. dollar)		1.00		-		0.20

See accompanying notes that are an integral part of these Consolidated Financial Statements.

F-3

Seadrill Limited

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

 for the years ended December 31, 2012, 2011 and 2010

(In US$ millions)

	2012		2011		2010
Net income		1,205		1,482		1,172
Other comprehensive income/(loss), net of tax:
Change in unrealized gain/(loss) on marketable securities, net		205		(291)		(25)
Change in unrealized foreign exchange differences		13		38		27
Change in actuarial (loss)/gain relating to pension		(25)		(3)		(32)
Change in unrealized gain/(loss) on interest rate swaps in subsidiaries		-		1		(2)
Deconsolidation of  subsidiaries		-		(63)		-
Change in unrealized gain/(loss) on interest rate swaps in VIEs		20		20		(11)
Other comprehensive (loss)/income:		213		(298)		(43)
Total comprehensive income for the period		1,418		1,184		1,129
Comprehensive income attributable to the parent		1,341		1,073		1,081
Comprehensive income attributable to the non-controlling interest		77		111		48

Note: All items of other comprehensive income/(loss) are stated net of tax.

See accompanying notes that are an integral part of these Consolidated Financial Statements.

F-4

Seadrill Limited

CONSOLIDATED BALANCE SHEETS

 for the years ended December 31, 2012 and 2011

(In US$ millions)

	2012		2011
ASSETS
Current assets
Cash and cash equivalents		318		483
Restricted cash		184		232
Marketable securities, net		333		24
Accounts receivables, net		917		720
Amount due from related party		293		185
Other current assets		309		323
Total current assets		2,354		1,967
Non-current assets
Investment in associated companies		509		721
Newbuildings		1,882		2,531
Drilling units		12,894		11,223
Goodwill		1,320		1,320
Restricted cash		218		250
Deferred tax assets		13		33
Equipment		40		25
Other non-current assets		402		234
Total non-current assets		17,278		16,337
Total assets		19,632		18,304
LIABILITIES AND EQUITY
Current liabilities
Current portion of long-term debt		2,066		1,419
Trade accounts payable		72		38
Short-term deferred taxes		6		10
Short-term debt to related party		131		19
Other current liabilities		1,338		1,285
Total current liabilities		3,613		2,771
Non-current liabilities
Long-term interest bearing debt		8,695		8,574
Long-term debt due to related parties		935		435
Deferred taxes		77		34
Other non-current liabilities		288		188
Total non-current liabilities		9,995		9,231
Commitments and contingencies (see note 32)		-		-
Equity
Common shares of par value US$2.00 per share: 800,000,000 shares authorized 469,178,074 outstanding at December 31, 2012 (December, 31 2011: 467,772,174)		938		935
Additional paid in capital		2,332		2,097
Contributed surplus		1,956		1,956
Accumulated other comprehensive income/(loss)		194		(5)
Accumulated earnings		83		994
Non-controlling interest		521		325
Total equity		6,024		6,302
Total liabilities and equity		19,632		18,304

See accompanying notes that are an integral part of these Consolidated Financial Statements.

F-5

Seadrill Limited

CONSOLIDATED STATEMENTS OF CASH FLOWS

for the years ended December 31, 2012, 2011 and 2010

(In US$ millions)

	2012		2011		2010
Cash Flows from Operating Activities
Net income		1,205		1,482		1,172
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		615		563		480
Amortization of deferred loan charges		30		31		43
Amortization of unfavorable contracts		-		(24)		(39)
Amortization of favorable contracts		12		23		13
Amortization of mobilization revenue		(162)		(96)		(86)
Impairment loss on marketable securities		-		10		15
Share of results from associated companies loss/ (gain)		220		420		(48)
Share-based compensation expense		8		10		11
Gain on disposal of fixed assets		-		(22)		(26)
Gain on decline in ownership interest		(169)		-		-
Unrealized (gain)/loss related to derivative financial instruments		6		261		97
Non cash gain recognized related to realization of marketable securities		(86)		(416)		(43)
Non cash gain recognized related to loss of control		-		(540)		-
Dividend received from associated company		18		57		61
Deferred income tax expense		25		(9)		110
Unrealized foreign exchange loss/ (gain) on long term interest bearing debt		6		(5)		(4)
Non-cash loss recognized on extinguishment of convertible debt		-		-		48
Non-cash gains recognized on acquisition of subsidiaries		-		-		(167)
Payments for long-term maintenance		(133)		(147)		(90)
Changes in operating assets and liabilities, net of effect of acquisitions
Unrecognized mobilization fees received from customers		238		58		109
Trade accounts receivable		(198)		(52)		(163)
Trade accounts payable		34		(35)		(15)
Prepaid expenses/accrued revenue		(64)		79		(107)
Interest bearing note receivable with customers		(76)		-		-
Other, net		61		21		(161)
Net cash provided by operating activities		1,590		1,669		1,210

F-6

Seadrill Limited

CONSOLIDATED STATEMENTS OF CASH FLOWS

for the years ended December 31, 2012, 2011 and 2010

(In US$ millions)

	2012		2011		2010
Cash Flows from Investing Activities
Additions to newbuilding		(1,343)		(2,381)		(2,006)
Additions to rigs and equipment		(214)		(15)		(272)
Sale of rigs and equipment		-		245		55
Settlement of disputes with ship yard		38		-		-
Investment in subsidiaries, net of cash acquired		-		(26)		(152)
Cash deconsolidated upon loss of control in subsidiary		-		(127)		-
Change in margin calls and other restricted cash		102		(43)		51
Investment in associated companies		(153)		(287)		(13)
Proceed from repayment of short term loan to related parties		-		-		90
Disposal of associated companies		65		-		-
Short-term loan granted to related parties		(55)		-		(160)
Purchase of marketable securities		(19)		(13)		(15)
Long term loan granted to related parties		(20)		-		-
Repayment from long term loan granted to related parties		20		-		-
Proceeds from realization of marketable securities		219		161		215
Net cash used in investing activities		(1,360)		(2,486)		(2,207)
Cash Flows from Financing Activities
Proceeds from debt		3,477		5,929		3,902
Repayments of debt		(2,752)		(4,116)		(1,870)
Debt fees paid		(37)		(49)		(33)
Proceeds from debt to related party		1,013		-		-
Repayments of debt to related party		(487)		-		-
Change in current liability related to share forward contracts		-		-		(12)
Paid to non-controlling interests		(50)		(95)		(292)
Contribution from non-controlling interests, net of issuance cost		350		418		289
Purchase of treasury shares		-		(130)		(42)
Proceeds from sale of treasury shares		16		21		23
Dividends paid		(1,925)		(1,440)		(990)
Proceeds from issuance of equity		-		-		318
Net cash provided by/(used in) financing activities		(395)		538		1,293
Effect of exchange rate changes on cash and cash equivalents		-		7		(1)
Net (decrease)/ increase in cash and cash equivalents		(165)		(272)		295
Cash and cash equivalents at beginning of the period		483		755		460
Cash and cash equivalents at the end of period		318		483		755
Supplementary disclosure of cash flow information
Interest paid, net of capitalized interest		260		208		226
Taxes paid		179		188		134

See accompanying notes that are an integral part of these Consolidated Financial Statements.

F-7

Seadrill Limited

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

for the years ended December 31, 2012, 2011 and 2010

(In US$ millions)

	Share Capital			Additional paid in capital			Contributed surplus		Accumulated other comprehensive income			Retained Earnings			Non-controlling interest			Total equity
Balance at December 31, 2009		798			164			1,956		359			902			634			4,813
Sale of treasury shares		3			20														23
Purchase of treasury shares		(4	)		(38	)													(42	)
Issuance of shares		27			292											289			608
Induced conversion of convertible bonds		62			647														709
Employee stock options issued					11														11
Convertible loan-equity portion					121														121
Other comprehensive income										(36	)					(7	)		(43	)
Step-up acquisition of Scorpion													(13	)		13			0
Contribution by non-controlling interest																282			282
Paid to non-controlling interest																(292	)		(292	)
Dividend paid													(990	)					(990	)
Dividend paid to Non-controlling interest in VIE																(435	)		(435	)
Net income													1,117			55			1,172
Balance at December 31, 2010		886			1,217			1,956		323			1,016			539			5,937
Sale of treasury shares		1			20														21
Purchase of treasury shares		(5	)		(120	)										(5	)		(130	)
Employee stock options issued					10														10
Change in actuarial gain/losses relating to pension										(3	)								(3	)
Establishment of non-controlling interest in North Atlantic Drilling Ltd					307											118			425
Costs related to capital increase in subsidiary					(7	)													(7	)
(Un)realized gain/loss on marketable securities										(291	)								(291	)
Foreign exchange differences										28						10			38
Change in unrealized loss on interest rate swaps in VIEs																20			20
Change in unrealized loss on interest rate swaps in subsidiaries										1									1
Dividend													(1,423	)		(17	)		(1,440	)
Dividend paid to Non-controlling interest in VIE																(23	)		(23	)
Shares purchased from non controlling interests					(4	)										(68	)		(72	)
Deconsolidation of subsidiaries										(63	)					(330	)		(393	)
Induced conversion of convertible bonds		53			674														727
Net income													1,401			81			1,482
Balance at December 31, 2011		935			2,097			1,956		(5	)		994			325			6,302
Sale of treasury shares		3			12														15
Employee stock options issued					8														8
Private placement in North Atlantic Drilling Ltd					84											66			150
Establishment of non-controlling interest in Seadrill Partners LLC					134											69			203
Costs related to capital increase in subsidiary					(3	)													(3	)
Other comprehensive income										199						14			213
Dividend													(2,019	)		(50	)		(2,069	)
Net income													1,108			97			1,205
Balance at December 31, 2012		938			2,332			1,956		194			83			521			6,024

See accompanying notes that are an integral part of these Consolidated Financial Statements.

F-8

Seadrill Limited

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1- General information

Seadrill Limited ("Seadrill" or the "Company") was incorporated in Bermuda in May 2005, and is a listed company on the Oslo Stock Exchange and the New York Stock Exchange. Seadrill, through a number of acquisitions of other companies and contracts for newbuildings, has developed into one of the largest international offshore drilling contractors, providing services within drilling and well services. As of December 31, 2012 the Company owned a versatile fleet consisting of drillships, jack-up rigs, semi-submersible rigs and tender rigs for operations in shallow and deepwater areas, as well as benign and harsh environments, totaling 43 offshore drilling units, plus an additional 23 units under construction.

In addition to owning and operating offshore floaters, jack-up rigs and tender rigs up until February 2011, we provided platform drilling, well intervention and engineering services through the separately Oslo Stock Exchange listed company named Archer Ltd, ("Archer"), a Bermuda company in which we own 39.9% at the end of December 2012. Archer is accounted for as an investment in an associated company.

As used herein, and unless otherwise required by the context, the term "Seadrill" refers to Seadrill Limited and the terms "Company", "we", "Group", "our" and words of similar import refer to Seadrill and its consolidated companies. The use herein of such terms as group, organization, we, us, our and its, or references to specific entities, is not intended to be a precise description of corporate relationships.

Basis of presentation

The financial statements are presented in accordance with generally accepted accounting principles in the United States of America (US GAAP). The amounts are presented in United States dollar (U.S. dollar) rounded to the nearest million, unless otherwise stated.

The accompanying consolidated financial statements present the financial position of Seadrill Limited, the consolidated subsidiaries and the group's interest in associated entities. Investments in companies in which the Company directly or indirectly holds more than 50% of the voting control are consolidated in the financial statements, as well as certain variable interest entities of which the Company is deemed to be the primary beneficiary.

We have in 2012 and 2011 significantly expanded our fleet of drilling rigs and as a result of this our long term maintenance has increased correspondingly. In response to this, we determined that we had incorrectly classified payments related to long term maintenance as an investing activity rather than as an operating activity in the consolidated statement of cash flows.  We concluded that such classification was not material to cash flows from operating activities and investing activities for previously reported periods.  Accordingly, the presentation of the consolidated statement of cash flows for the years ending December 31, 2011 and 2010 have been revised.  This resulted in a decrease in cash provided by Operating Activities and an increase in cash used by Investing Activities, of $147 million in 2011 and $90 million in 2010.

The accounting policies set out below have been applied consistently to all periods in these consolidated financial statements, unless otherwise noted.

Basis of consolidation

The consolidated financial statements include the assets and liabilities of the Company and its subsidiaries and certain variable interest entities, ("VIE"s) in which the Company is deemed to be the primary beneficiary. All intercompany balances and transactions have been eliminated on consolidation.

A variable interest entity is defined in ASC Topic 810 "Consolidation" ("ASC 810") as a legal entity where either (a) the total equity at risk is not sufficient to permit the entity to finance its activities without additional subordinated support; (b) equity interest holders as a group lack either i) the power to direct the activities of the entity that most significantly impact on its economic success, ii) the obligation to absorb the expected losses of the entity, or iii) the right to receive the expected residual returns of the entity; or (c) the voting rights of some investors in the entity are not proportional to their economic interests and the activities of the entity involve or are conducted on behalf of an investor with a disproportionately small voting interest.

F-9

ASC 810 requires a variable interest entity to be consolidated by its primary beneficiary, being the interest holder, if any, which has both (1) the power to direct the activities of the entity which most significantly impact on the entity's economic performance, and (2) the right to receive benefits or the obligation to absorb losses from the entity which could potentially be significant to the entity.

We evaluate our subsidiaries, and any other entities in which we hold a variable interest, in order to determine whether we are the primary beneficiary of the entity, and where it is determined that we are the primary beneficiary we fully consolidate the entity.

Investment in companies in which we hold an ownership interest of between 20% and 50%, and over which we exercise significant influence, but do not consolidate, are accounted for using the equity method. The Company records its investments in associated companies and its share of earnings or losses in the consolidated statements of operations as "Share in results from associated companies." The excess, if any, of purchase price over book value of the Company's investments in equity method investees is included in the accompanying consolidated balance sheets in "Investment in associated companies."

Investments in companies in which our ownership is less than 20% are valued at fair value unless it is not possible to estimate fair value, then the cost method is used.

Intercompany transactions and internal sales have been eliminated on consolidation. Unrealized gains and losses arising from transactions with associates are eliminated to the extent of the Company's interest in the entity.

Note 2- Accounting policies

Use of estimates

Preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Contract revenue

A substantial majority of the Company's revenues are derived from dayrate based drilling contracts (which may include lump sum fees for mobilization and demobilization) and other service contracts. Both dayrate based and lump sum fee revenues are recognized ratably over the contract period when services are rendered. Under some contracts, the Company is entitled to additional payments for meeting or exceeding certain performance targets. Such additional payments are recognized when any uncertainties are resolved or upon completion of the drilling program.

In connection with drilling contracts, the Company may receive lump sum fees for the mobilization of equipment and personnel or for capital additions and upgrades prior to commencement of drilling services. These up-front fees are recognized as revenue over the contract term, excluding option periods.

In some cases, the Company may receive lump sum non-contingent fees or dayrate based fees from customers for demobilization upon completion of a drilling contract. Non-contingent demobilization fees are recognized as revenue over contract term, excluding option periods not exercised by our customers. Contingent demobilization fees are recognized as earned upon completion of the drilling contract.

Fees received from customers under drilling contracts for capital upgrades are deferred and recognized over the contract term, excluding option periods not exercised.

Reimbursables

Reimbursements received for the purchases of supplies, personnel services and other services provided on behalf of and at the request of our customers in accordance with a contract or agreement are recorded as revenue. The related costs are recorded as reimbursable expenses in the same period.

F-10

 Other revenues

In a business combination there may exist favorable and unfavorable drilling contracts which are recorded at fair value at the date of acquisition. A favorable or unfavorable drilling contract is a contract that has a dayrate which differs from prevailing market rates at the time of acquisition. The net present value of such contracts is recorded as an asset or liability at the purchase date and subsequently recognized as revenue or reduction to revenue over the contract term.

Mobilization and demobilization expenses

Demobilization costs are costs related to the transfer of a vessel or drilling rig to a safe harbor or different geographic area and are expensed as incurred.

Mobilization costs incurred as part of a contract are capitalized and recognized as expense over the contract term, excluding option periods not exercised by our customers. The costs of relocating drilling units that are not under contract are expensed as incurred.

Rig Operating Expenses

Rig operating expenses are costs associated with operating a drilling rig that is either in operation or stacked, and include the remuneration of offshore crews and related costs, rig supplies, insurance costs, expenses for repairs and maintenance as well as costs related to onshore personnel in various locations where we operate the rigs and are expensed as incurred.

Repairs, maintenance and periodic surveys

Costs related to periodic overhauls of drilling units are capitalized under drilling units and amortized over the anticipated period between overhauls, which is generally five years. Related costs are primarily yard costs and the cost of employees directly involved in the work. Amortization costs for periodic overhauls are included in depreciation and amortization expense. Costs for other repair and maintenance activities are included in vessel and rig operating expenses and are expensed as incurred.

Foreign currencies

The Company and the majority of its subsidiaries use the U.S. dollars as their functional currency because the majority of their revenues and expenses are denominated in U.S. dollars. Accordingly, the Company's reporting currency is also U.S. dollars. For subsidiaries that maintain their accounts in currencies other than U.S. dollars, the Company uses the current method of translation whereby the statements of operations are translated using the average exchange rate for the year and the assets and liabilities are translated using the year end exchange rate. Foreign currency translation gains or losses on consolidation are recorded as a separate component of other comprehensive income in shareholders' equity.

Transactions in foreign currencies are translated into U.S. dollars at the rates of exchange in effect at the date of the transaction. Foreign currency assets and liabilities are translated using rates of exchange at the balance sheet date. Gains and losses on foreign currency transactions are included in the consolidated statements of operations.

Current and non-current classification

Receivables and liabilities are classified as current assets and liabilities respectively, if their maturity is within one year of the balance sheet date. Otherwise, they are classified as non-current assets and liabilities.

Cash and cash equivalents

Cash and cash equivalents consist of cash, bank deposits and highly liquid financial instruments with original maturities of three months or less.

Restricted cash

Restricted cash consists of bank deposits which have been pledged as collateral for certain guarantees issued by a bank or minimum deposits which must be maintained in accordance with contractual arrangements. Restricted cash with maturity longer than one year are classified as non-current assets.

F-11

Marketable securities

Marketable equity securities held by the Company are considered to be available-for-sale and, as such, are recorded at fair value with resulting unrealized gains and losses recorded as a separate component of accumulated other comprehensive income in shareholders' equity. The Company also holds marketable securities considered to be trading securities and as such, are recorded at fair value with resulting unrealized gains and losses recorded through the profit and loss statement. Gains and losses on forward contracts to purchase marketable equity securities that do not meet the definition of a derivative are accounted for as available-for-sale.

Receivables

Receivables, including accounts receivable, are recorded in the balance sheet at their nominal amount less an allowance for doubtful accounts. The Company establishes reserves for doubtful accounts on a case-by-case basis when it is unlikely that required payments of specific amounts will occur. In establishing these reserves, the Company considers the financial condition of the customer as well as specific circumstances related to the receivable such as customer disputes. Receivable amounts determined as being unrecoverable are written off.

Impairment of marketable securities and equity method investees

The Company analyzes its available-for-sale securities and equity method investees for impairment at each reporting period to evaluate whether an event or change in circumstances has occurred in that period that may have a significant adverse effect on the value of the investment. The Company records an impairment charge for other-than-temporary declines in value when the value is not anticipated to recover above cost within reasonably period after the measurement date, unless there are mitigating factors that indicate impairment may not be required. If an impairment charge is recorded, subsequent recoveries in value are not reflected in earnings until sale of the securities held as available for sale or of the equity method investee are sold.

Newbuildings

The carrying value of rigs under construction ("Newbuildings") represents the accumulated costs at the balance sheet date. Cost components include payments for yard installments and variation orders, construction supervision, equipment, spare parts, capitalized interest, costs related to first time mobilization and commissioning costs. No charge for depreciation is made until commissioning of the newbuilding has been completed and it is ready for its intended use.

The Company may have option agreements with shipyards to order new rigs at fixed or variable prices which require some or no additional payment upon exercise. Payments for rig purchase options are capitalized at the time when option contracts are acquired or entered into. The Company reviews the expected future cash flows, which would result from the exercise of each option contract on a contract by contract basis to determine whether the carrying value of the option is recoverable.

Capitalized interest

Interest expenses are capitalized during construction of newbuildings based on accumulated expenditures for the applicable project at the Company's current rate of borrowing. The amount of interest expense capitalized in an accounting period shall be determined by applying an interest rate ("the capitalization rate") to the average amount of accumulated expenditures for the asset during the period. The capitalization rates used in an accounting period shall be based on the rates applicable to borrowings outstanding during the period. The Company does not capitalize amounts beyond the actual interest expense incurred in the period.

If the Company's financing plans associate a specific new borrowing with a qualifying asset, the Company uses the rate on that borrowing as the capitalization rate to be applied to that portion of the average accumulated expenditures for the asset that does not exceed the amount of that borrowing. If average accumulated expenditures for the asset exceed the amounts of specific new borrowings associated with the asset, the capitalization rate to be applied to such excess shall be a weighted average of the rates applicable to other borrowings of the Company.

F-12

Drilling units

Rigs, vessels and equipment are recorded at historical cost less accumulated depreciation. The cost of these assets, less estimated residual value is depreciated on a straight-line basis over their estimated remaining economic useful lives. The estimated economic useful life of the Company's floaters, jack-up rigs and tender rigs, when new, is 30 years.

Significant investments are capitalized and depreciated in accordance with the nature of the investment. Significant investments that are deemed to increase an asset's value for its remaining useful life are capitalized and depreciated over the remaining life of the asset.

Assets are classified as held for sale when all of the following criteria are met, which are as follows: Management, having the authority to approve the action, commits to a plan to sell the asset (disposal group), the asset (disposal group) is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such assets (disposal groups), an active program to locate a buyer and other actions required to complete the plan to sell the asset (disposal group) have been initiated, the sale of the asset (disposal group) is probable, and transfer of the asset (disposal group) is expected to qualify for recognition as a completed sale, within one year. The term probable refers to a future sale that is likely to occur, the asset (disposal group) is being actively marketed for sale at a price that is reasonable in relation to its current fair value and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

Cost of property and equipment sold or retired, with the related accumulated depreciation and write-downs are removed from the balance sheet, and resulting gains or losses are included in the consolidated statement of operations.

Equipment

Equipment is recorded at historical cost less accumulated depreciation and is depreciated over its estimated remaining useful life, which is between three and five years depending on the type of asset.

Goodwill

The Company allocates the purchase price of acquired businesses to the identifiable tangible and intangible assets and liabilities acquired, with any remaining amount being recorded as goodwill. Goodwill is tested for impairment at least annually at the reporting unit level, which is defined as an operating segment or a component of an operating segment that constitutes a business for which financial information is available and is regularly reviewed by management. The Company has determined that its reporting units are the same as its operating segments for the purpose of allocating goodwill and the subsequent testing of goodwill for impairment.

The Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two step goodwill impairment test.

If the qualitative factors indicate possible impairment, the standard requires the Company to compare the fair value of its reporting units to their carrying value.  In the event that the fair value is less than carrying value, the Company must perform an exercise similar to a purchase price allocation in a business combination in order to determine the amount of the impairment charge.

The goodwill impairment test for a reporting unit is based on discounted cash flows. The Company uses estimated future cash flows applying contract dayrates during the firm contract periods and estimated forecasted dayrates for the periods after expiry of firm contract periods. Zero escalation of dayrates for the periods will be assumed. The estimated future cash flows will be based on remaining economic useful lives for the assets, and discounted using a weighted average cost of capital (WACC).

Other intangible assets

Other intangible assets are recorded at historical cost less accumulated amortization. The cost of these assets less estimated residual value is amortized on a straight-line basis over the estimated remaining economic useful lives. Other intangible assets include technology and customer relationships.

F-13

Impairment of long-lived assets

The carrying value of long-lived assets that are held and used by the Company are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may no longer be appropriate. The Company assesses recoverability of the carrying value of the asset by estimating the undiscounted future net cash flows expected to result from the asset, including eventual disposition. If the undiscounted future net cash flows are less than the carrying value of the asset, an impairment is made to the market value or the discounted future net cash flows.

Defined benefit pension plans

The Company has several defined benefit plans which provide retirement, death and early termination benefits. The Company's net obligation is calculated separately for each plan by estimating the amount of the future benefit that employees have earned in return for their cumulative service.

The aggregated projected future benefit obligation is discounted to a present value, and the aggregated fair value of any plan assets is deducted. The discount rate is the market yield at the balance sheet date on government bonds in the relevant currency and based on terms consistent with the post-employment benefit obligations. The retirement benefits are generally a function of number of years of employment and amount of employees' remuneration. The plans are primarily funded through payments to insurance companies. The Company records its pension costs in the period during which the services are rendered by the employees. Actuarial gains and losses are recognized in the statement of operations when the net cumulative unrecognized actuarial gains or losses for each individual plan at the end of the previous reporting year exceed 10 percent of the higher of the present value of the defined benefit obligation and the fair value of plan assets at that date. These gains and losses are recognized over the expected remaining working lives of the employees participating in the plans. Otherwise, recognition of actuarial gains and losses is included in other comprehensive income.  Those amounts will be subsequently recognized as a component of net periodic pension cost on the same basis as the amounts recognized in accumulated other comprehensive income.

Treasury shares

Treasury shares are recognized at cost as a component of equity. The purchase of treasury shares reduces the Company's share capital by the nominal value of the acquired treasury shares. The amount paid in excess of the nominal value is treated as a reduction of additional paid-in capital.

Derivative Financial Instruments and Hedging Activities

The Company's interest-rate swap agreements, foreign currency options and forward exchange contracts are recorded at fair value. Changes in the fair value of interest-rate swap agreements, forward exchange and currency options contracts, which have not been designated as hedging instruments, are recorded as a gain or loss as a separate line item within Financial Items.

Changes in the fair value of any derivative instrument that we have formally designated as a hedge, are recognized in Accumulated other comprehensive income (loss) in the Consolidated Balance Sheets. Any change in fair value relating to an ineffective portion of a designated hedge is recognized, in the Consolidated Statement of Operations. When the hedged item affects the income statement, the gain or loss included in accumulated other comprehensive income is reported on the same line in the Consolidated Statements of Operations as the hedged item.

Financial instruments such as forward contracts to purchase shares that do not qualify as derivative instruments are not recognized on the balance sheet, unless deemed impaired. Such instruments are off-balance sheet transactions and result in only disclosures to the financial statements.

Income taxes

Seadrill is a Bermuda company. Currently, Seadrill is not required to pay taxes in Bermuda on ordinary income or capital gains as we qualify as an exempt company. The Company has received written assurance from the Minister of Finance in Bermuda that it will be exempt from taxation until March 2035. Certain subsidiaries operate in other jurisdictions where taxes are imposed. Consequently income taxes have been recorded in these jurisdictions when appropriate.

F-14

Significant judgment is involved in determining the provision for income taxes. There are certain transactions for which the ultimate tax determination is unclear due to uncertainty in the ordinary course of business. Seadrill recognizes tax liabilities based on its assessment of whether its tax positions are more likely than not sustainable, based on the technical merits and considerations of the relevant taxing authority's widely understood administrative practices and precedence.

Income tax expense consists of taxes currently payable and changes in deferred tax assets and liabilities calculated according to local tax rules. Deferred tax assets and liabilities are based on temporary differences that arise between carrying values used for financial reporting purposes and amounts used for taxation purposes of assets and liabilities and the future tax benefits of tax loss carry forwards. A deferred tax asset is recognized only to the extent that it is more likely than not that future taxable profits will be available against which the asset can be utilized. The amount of deferred tax provided is based upon the expected manner of settlement of the carrying amount of assets and liabilities, using tax rates enacted at the balance sheet date. The impact of tax law changes is recognized in periods when the change is enacted.

Deferred charges

Loan related costs, including debt arrangement fees, are capitalized and amortized over the term of the related loan and are included in interest expense.

Convertible debt

Convertible bond loans issued by the Company include both a loan component (host contract) and an option to convert the loan to shares (embedded derivative).

An embedded derivative, such as a conversion option, may be separated from its host contract and accounted for separately if certain criteria are met (including if the contract that embodies both the embedded derivative and the host contract is not measured at fair value, the economic characteristics and risks of the embedded derivative instrument are not clearly and closely related to the economic characteristics and risks of the host contract and if a separate instrument with the same terms as the embedded instrument would be a derivative).

If an embedded derivative instrument is separated from its host contract, the host contract shall be accounted for based on generally accepted accounting principles applicable to instruments of that type which do not contain embedded derivative instruments.

Total Return Equity Swaps

From time to time, the Company enters into total return equity swaps ("TRS") indexed to the Company's own shares, where the counterparty acquires shares in the Company and the Company carries the risk of fluctuations in the share price of the acquired shares. The fair value of each TRS is recorded as an asset or liability, with the changes in fair value recorded in the consolidated statement of operations. The Company may, from time to time, enter into TRS arrangements indexed to shares in other companies which are accounted for in a similar manner.

Share-based compensation

The Company has established an employee share ownership plan under which employees, directors and officers of the Group may be allocated options to subscribe for new shares in the ultimate parent, Seadrill Limited. The compensation cost for share options is recognized as an expense over the service period based on the fair value of the options granted.

The fair value of the share options issued under the Company's employee share option plans is determined at grant date taking into account the terms and conditions upon which the options are granted, and using a valuation technique that is consistent with generally accepted valuation methodologies for pricing financial instruments, and that incorporates all factors and assumptions that knowledgeable, willing market participants would consider in determining fair value. The fair value of the share options is recognized as personnel expenses with a corresponding increase in equity over the period during which the employees become unconditionally entitled to the options. Compensation cost is initially recognized based upon options expected to vest with appropriate adjustments to reflect actual forfeitures. National insurance contributions arising from such incentive programs are expensed when the options are exercised.

F-15

Provisions

A provision is recognized in the balance sheet when the Company has a present legal or constructive obligation as a result of a past event, and it is probable that an outflow of economic benefits will be required to settle the obligation and a reliable estimate of the amount can be made. If the effect is material, provisions are determined by discounting the expected future cash flows at a pre-tax rate that reflects current market assessments of the time value of money and, where appropriate, the risks specific to the liability.

Segment reporting

We have in 2011 and 2012 significantly expanded our fleet of drilling rigs through acquisitions of new rigs and newbuilding orders. In response to this development we reviewed our internal reporting structure including the operating and reporting business segments in 2011. The review resulted in a change in our reporting segments with effect from January 1, 2011.

As of December 31, 2012, the Company has three reportable business segments which include floaters, jack-up rigs and tender rigs. The well services business segment included the activities of Archer which performs various services related to platform drilling, drilling facility engineering, well intervention and oilfield services. With effect from the end of February 2011, Archer has been deconsolidated and the well services segment is no longer part of our consolidated financial statements.

Related parties

Parties are related if one party has the ability, directly or indirectly, to control the other party or exercise significant influence over the other party in making financial and operating decisions. Parties are also related if they are subject to common control or common significant influence. All transactions between the related parties are based on the principle of arm's length.

Earnings per share

Basic earnings per share ("EPS") is calculated based on the income (loss) for the period available to common stockholders divided by the weighted average number of shares outstanding for basic EPS for the period. Diluted EPS includes the effect of the assumed conversion of potentially dilutive instruments which for the Company includes share options and convertible debt. The determination of dilutive earnings per share requires the Company to potentially make certain adjustments to net income and for the weighted average shares outstanding used to compute basic earnings per share unless anti-dilutive.

Reclassifications

Certain reclassifications have been made to prior period amounts to conform to the current year presentation. These reclassifications did not have a material effect on the consolidated financial statements (refer to the Basis of preparation stated above).

Recently Issued Accounting Standards

Balance sheet—Effective January 1, 2013, we will adopt the accounting standards update that expands the disclosure requirements for the offsetting of assets and liabilities related to certain financial instruments and derivative instruments.  The update requires disclosures to present both gross information and net information for financial instruments and derivative instruments that are eligible for net presentation due to a right of offset, an enforceable master netting arrangement or similar agreement.  The update is effective for interim and annual periods beginning on or after January 1, 2013.  We do not expect that our adoption will have a material effect on our consolidated balance sheet.

Balance sheet—Effective January 1, 2013, we will adopt the accounting standards update that requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. generally accepted accounting principles (GAAP) to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. For public entities, the amendments are effective prospectively for reporting periods beginning after December 15, 2012. We do not expect that our adoption will have a material effect on our financial statements.

F-16

Note 3 – Segment information

Operating segments

The Company provides drilling and related services to the offshore oil and gas industry. Our business has been organized into segments based on differences in management structure and reporting, economic characteristics, customer base, asset class, and contract structure. We currently operate in the following three segments:

Floaters: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to semi-submersible rigs and drillships for harsh and benign environments in mid-, deep- and ultra-deep waters.

Jack-up rigs: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to jack-up rigs for operations in harsh and benign environment.

Tender rigs: We offer services encompassing drilling, completion and maintenance of offshore production wells in Southeast Asia, West Africa and the Americas. The drilling contracts relate to self-erecting tender rigs and semi-submersible tender rigs.

Segment results are evaluated on the basis of operating revenues, and the information given below is based on information used for internal management reporting. The accounting principles for the segments are the same as for our consolidated financial statements.

Revenues (excluding gain on sale of drilling units)

(In US$ millions)	2012		2011		2010
Floaters		2,859		2,694		2,264
Jack-up rigs		861		776		578
Tender Rigs		758		589		482
Well Services		-		133		717
Total		4,478		4,192		4,041

Depreciation and amortization

(In US$ millions)	2012		2011		2010
Floaters		412		358		301
Jack-up rigs		146		135		99
Tender Rigs		57		63		57
Well Services		-		7		23
Total		615		563		480

Operating Income – net income

(In US$ millions)	2012			2011			2010
Floaters		1,250			1,328			1,140
Jack-up Rigs		225			220			199
Tender Rigs		316			221			222
Well Services		-			5			64
Operating income		1,791			1,774			1,625
Unallocated items:
Total financial items		(354	)		(103	)		(294	)
Income taxes		(232	)		(189	)		(159	)
Net income		1,205			1,482			1,172

F-17

Total assets

(In US$ millions)	2012		2011
Floaters		13,725		12,600
Jack-up Rigs		4,210		4,200
Tender Rigs		1,697		1,504
Total		19,632		18,304

Goodwill

(In US$ millions)	2012		2011
Floaters		890		890
Jack-up Rigs		281		281
Tender Rigs		149		149
Total		1,320		1,320

As a consequence of the change in segment structure from 2011, the Goodwill has been reassigned to the reporting units affected using a relative fair value allocation approach.

Total liabilities

(In US$ millions)	2012		2011
Floaters		9,514		8,274
Jack-up Rigs		2,918		2,745
Tender Rigs		1,176		983
Total		13,608		12,002

 Capital expenditures – fixed assets

(In US$ millions)	2012		2011		2010
Floaters		1,342		1,805		1,330
Jack-up Rigs		150		495		877
Tender Rigs		198		243		134
Well Services		-		-		27
Total		1,690		2,543		2,368

Geographic segment data

Revenues are attributed to geographical segments based on the country of operations for drilling activities, i.e. the country where the revenues are generated. The following presents the Company's revenues and fixed assets by geographic area:

F-18

Revenues (excluding gain on sale of assets)

(In US$ millions)	2012		2011		2010
Norway		815		966		1,393
UK		230		56		151
Brunei		95		54		66
Thailand		310		303		165
Malaysia		226		207		62
Congo		2		-		37
Nigeria		419		235		204
Canada		66		-		-
USA		260		202		186
Brazil		629		913		710
China		183		299		230
Indonesia		92		130		159
Philippines		-		-		109
Vietnam		180		157		150
Angola		358		337		182
Red Sea		-		-		68
Trinidad & Tobago		83		41		-
Ghana		122		-		-
Saudi Arabia/Kuwait		146		127		69
Mexico		137		49		-
Other		125		116		100
Total		4,478		4,192		4,041

Fixed assets – operating drilling units (1)

(In US$ millions)	2012		2011
Norway		1,868		2,007
UK		1,112		-
Brunei		197		38
Thailand		354		605
Malaysia		690		333
Congo		161		-
Nigeria		1,148		1,191
Canada		546		-
USA		1,296		496
Brazil		1,714		2,096
China		-		1,091
Indonesia		99		321
Vietnam		337		336
Angola		945		979
Trinidad & Tobago		252		424
Ghana		655
Saudi Arabia		661		331
Mexico		593		605
Other		267		370
Total		12,894		11,223

(1) The fixed assets referred to in the table are the Company's operating drilling units. Asset locations at the end of a period are not necessarily indicative of the geographic distribution of the revenues or operating profits generated by such assets during such period.

F-19

Note 4 – Taxation

Income taxes consist of the following:

	Year ended December 31
(In US$ millions)	2012			2011			2010
Current tax expense:
Bermuda		-			-			-
Foreign		167			328			184
Deferred tax expense:
Bermuda		-			-			-
Foreign		58			24			14
Deferred taxes acquired during the year		-			-			-
Tax related to internal sale of assets in subsidiary,  amortized for group purposes		7			(163	)		(39	)
Total provision		232			189			159
Effective tax rate		16.1	%		11.3	%		12.1	%

The Company, including its subsidiaries, is taxable in several jurisdictions based on its rig operations. A loss in one jurisdiction may not be offset against taxable income in another jurisdiction. Thus, the Company may pay tax within some jurisdictions even though it might have an overall loss at the consolidated level.

The income taxes for the years ended December 31 differed from the amount computed by applying the statutory income tax rate of 0 % as follows:

	Year ended December 31
(In US$ millions)	2012		2011		2010
Income taxes at statutory rate		-		-		-
Effect of transfers to new tax jurisdictions		7		(163)		(39	)
Effect of change on uncertain tax positions relating to prior year		91		24		-
Effect of change in taxable currency		-		-		-
Effect of taxable income in various countries		134		328		198
Total		232		189		159

Deferred Income Taxes

Deferred income taxes reflect the impact of temporary differences between the amount of assets and liabilities recognized for financial reporting purposes and such amounts recognized for tax purposes. The net deferred tax assets (liabilities) consist of the following:

Deferred Tax Assets:

(In US$ millions)	December 31, 2012		December 31, 2011
Pension		8		11
Provisions		3		15
Property, plant and equipment		-		9
Other		2		8
Gross deferred tax asset		13		43

F-20

Deferred Tax Liability:

(In US$ millions)	December 31, 2012		December 31, 2011
Property, plant and equipment		5		-
Gain from sale of fixed assets		23		31
Foreign exchange		54		-
Other		1		13
Gross deferred tax liability		83		44
Net deferred tax		(70)		(1	)

Net deferred taxes are classified as follows:

(In US$ millions)	December 31, 2012		December 31, 2011
Short-term deferred tax asset		-		10
Long-term deferred tax asset		13		33
Short-term deferred tax liability		6		10
Long-term deferred tax liability		77		34
Net deferred tax		70		1

Future taxable income justifies the inclusion of tax loss carry-forward in the calculation of net deferred taxes.

Uncertain tax positions

In October 2011, the tax authorities in Norway issued a tax reassessment pertaining to tax filings made by our consolidated subsidiary, North Atlantic Drilling Limited ("North Atlantic") for the years 2007 through 2009. The following issues were addressed in the tax reassessment:

a) the Company's 2007 tax positions relating to a possible taxable gain arising from the transfer of certain legal entities to a different tax jurisdiction.  These positions also affect the relevant filed tax assessments for 2008, 2009 and 2010.  To the extent there is a taxable gain, there is also an uncertainty related to the amount of such gain, and this, in turn, is affected by the timing of the transfer of the domiciles of the legal entities to a new tax jurisdiction.  In the Company's opinion, the transfer by the legal entities of their domiciles took place in December 2007.

b) the principles for conversion of the functional currency for several Norwegian subsidiaries for tax reporting purposes. In the Company's view, applicable tax legislation is subject to various interpretations related to the calculation of the tax basis measured in Norwegian kroner. There is ongoing correspondence with tax authorities with regards to calculation methods for conversion of accounts in functional currency to taxable income in Norwegian kroner.

Management remains of the opinion that the tax authorities' position, related to item a) above, is based on an unconstitutional retroactive application of the law. We will vigorously defend ourselves against this claim and we have filed legal action in Norway to mitigate the liability. The case is set to be heard in October 2013 in the Oslo District Court.  As for item b) above, we are in ongoing discussions with the tax authorities.  In the event that we are successful in defending ourselves against these claims, current year and previous year amounts that have been recognized would be reversed into the Consolidated Statement Operations.

Management has performed an analysis for uncertain tax positions in the various jurisdictions in which the Company operates, in accordance with ASC Topic 740 Income Taxes. The Company has recognized additional expense in the Consolidated Statement of Operations of $91 million in 2012 to reflect the impact for the items above based of ongoing discussions with the tax authorities.

In 2011 the Company recorded tax expense of $24 million in the Consolidated Statement of Operations and $39 million as deferred charges in the Consolidated Balance Sheet, which is amortized over the remaining lifetime of the sold drilling units.

F-21

The changes to our liabilities related to unrecognized tax benefits, excluding interest and penalties that we recognize as a component of income tax expense, where as follows:

	Year ended December 31
(In US$ millions)	2012		2011		2010
Balance beginning of period	63		-		-
Additions during the period		91		63		-
Balance end of period		154		63		-

In relation  to the above mentioned possible tax claims, Seadrill Limited has provided North Atlantic Drilling Limited with a liquidity facility covering any liquidity exposure for North Atlantic Drilling Limited and where Seadrill Limited will keep North Atlantic Drilliing Limited harmless for any tax claim exceeding $63 million related to the move of legal entities to a new tax jurisdiction and the use of US dollar as the functional currency for tax reporting purposes.

The parent company, Seadrill Limited, is headquartered in Bermuda where we have been granted a tax exemption until 2035.  Other jurisdictions in which the Company and its subsidiaries operate are taxable based on rig operations. A loss in one jurisdiction may not be offset against taxable income in another jurisdiction.  Thus, the Company may pay tax within some jurisdictions even though it may have an overall loss at the consolidated level.  The following table summarizes the earliest tax years that remain subject to examination by the major taxable jurisdictions in which the Company operates:

Jurisdiction	Earliest Open Year
Australia	2008
Nigeria	2007
Norway	2007
Thailand	2003

Note 5 – Earnings per share

The components of the numerator and denominator for the calculation of basic and diluted earnings per share resulting from continuing operations are as follows:

	Net income		Weighted average million of shares outstanding		Earnings per share
2010
Earnings per share		1,117		409		2.73
Effect of dilution:
Convertible bonds		228		60
Share options		-		2
Diluted earnings per share**		1,345		471		2.73
2011
Earnings per share		1,401		459		3.05
Effect of dilution:
Convertible bonds		45		28
Share options		-		1
Diluted earnings per share		1,446		488		2.96
2012
Earnings per share		1,108		469		2.37
Effect of dilution:
Convertible bonds		37		20
Share options		-		1
Diluted earnings per share		1,145		490		2.34

F-22

**The loss on debt extinguishment of $145 million has been added back to net income in addition to interest expenses related to the convertible bonds. These effects are anti-dilutive, and exceed the effect of increased denominator when calculating the diluted earnings per share. As a consequence of this, the diluted earnings per share equal basic earnings per share.

Note 6 – Other revenues

Other revenues comprise the following items:

	Year ended December 31
(In US$ millions)	2012		2011			2010
Amortization of unfavorable contracts		-		24			39
Amortization of favorable contracts		(12)		(23	)		(13	)
Revenues related party		15		0			0
Total		3		1			26

The unfavorable contract values arose from the acquisition of Smedvig and Eastern Drilling in 2006 and represent the net present value of the existing contracts compared to the current market rates, discounted at the weighted average cost of capital. The estimated unfavorable contract values have been amortized and recognized under other revenues over the terms of the contracts, ranging from two to five years and are fully amortized at December 31, 2011. The favorable contract values arose from the acquisition of Scorpion in June 2010 and are amortized over a period ranging from 20 to 36 months.  As of December 31, 2012 unamortized amount of favorable contracts amounted to $3 million. Related party revenues are with Varia Perdana and its subsidiary Crest Tender Rigs Pte Ltd (together "Varia Group"), and Asia Offshore Drilling. We provide management support and administrative services for Asia Offshore Drilling and receive bare boat fees from Varia Group.

Note 7 – Accumulated other comprehensive income

Accumulated other comprehensive income for the years December 31, 2012 and December 31, 2011:

(In US$ millions)	December 31,			December 31,
	2012			2011
The total balance of accumulated other comprehensive income is made up as follows:
Unrealized gain on marketable securities		206			1
Unrealized gain on foreign exchange		67			54
Actuarial gain/(loss) relating to pension		(30	)		(11	)
Unrealized gain/ (loss) on interest rate swaps in VIEs		(49	)		(49	)
Accumulated other comprehensive income		194			(5	)

The applicable amount of income taxes associated with each component of other comprehensive income is $0 due to the fact that the items relate to companies domiciled in non-taxable jurisdictions. However, for actuarial loss related to pension, the accumulated applicable amount of income taxes is $8 million ($3 million in 2011) as this item is related to companies domiciled in Norway where the tax rate is 28%.

F-23

Note 8 – Gain on sale of assets

The Company has recognized the following gains and losses on sales of assets:

(In US$ millions)	Net proceeds		Book value on disposal		Gain/Loss
Year ended December 31, 2012:		-		-		-
Total for year ended December 31, 2012		-		-		-
Year ended December 31, 2011:
Sale of jack-up West Juno		248		226		22
Total for year ended December 31, 2011		248		226		22
Year ended December 31, 2010:
Sale of Jack-up rig West Larissa		55		29		26
Total for year ended December 31, 2010		55		29		26

Note 9 – Operating leases

The Company has operating leases relating to premises, the most significant being its offices in Stavanger, London, Singapore, Houston, Rio de Janeiro, Dubai and Aberdeen. In the years ended December 31, 2012, 2011 and 2010 rental expenses amounted to $25 million, $20 million and $21 million, respectively. Future minimum rental payments are as follows:

Year	US$ million
2013		23
2014		13
2015		10
2016		7
2017		8
2018 and thereafter		21
Total		82

Note 10 – Impairment loss on marketable securities and investments in associated companies

As at December 31, 2012, the Company owns a number of shares, share purchase agreements and bonds in companies including Archer Ltd., Asia Offshore Drilling Ltd., Varia Perdana Bhd., Tioman Drilling, Sevan

Drilling, Seabras Sapura, Itaunas Drilling, Camburi Drilling, Sahy Drilling, Petromena and SapuraKencana Petroleum Berhad.

In 2012, the Company determined that the decline in fair value of the Archer investment was other than temporary based primarily upon its evaluation of the severity of the excess of its cost basis over the market price of the security and the prospects for recovery within 2013. As a result, an impairment loss was recognized reducing its cost basis of this associated company to the market price of the shares in question as of December 31, 2012, which was $121 million. The impairment loss amounted to $221 million and is presented as share of result from associated companies in the consolidated statements of operations.

In 2011, the Company determined that the decline in fair value of the Archer investment was other than temporary based primarily upon its evaluation of the severity of the excess of its cost basis over the market price of the security and the future prospects. As a result, an impairment loss was recognized reducing its cost basis of this associated company to the market price of the shares in question as of December 31, 2011, which was $393 million. The impairment loss amounted to $463 million and is presented as share of result from associated companies in the consolidated statements of operations.

In 2011, the Company determined that the decline in fair value of its Seahawk Drilling Inc, "Seahawk", shares was other than temporary and as a result, an impairment loss was recognized reducing its cost basis to the market price of the shares in question as of December 31, 2011. The impairment loss amounted to $10 million and has been classified as a separate line item in the consolidated statements of operations.

F-24

In 2010, the Company determined that the decline in fair value of its Seahawk shares was other than temporary and as a result, an impairment loss was recognized reducing its cost basis to the market price of the shares in question as of December 31, 2010. The loss of $15 million was classified as a separate line item in the income statement.

Note 11 – Deconsolidation of subsidiary

Prior to February 23, 2011, Seawell Ltd was a consolidated subsidiary of Seadrill. On February 23, 2011, the stockholders in Allis-Chalmers Inc approved a merger agreement and a plan of merger, involving Allis-Chalmers, Seawell and Wellco Sub Company, pursuant to which Allis-Chalmers became a subsidiary of Seawell. At the same time Seawell was renamed Archer.

As of February 23, 2011, we held 117,798,650 shares in Archer. Based on closing share price of NOK34.00 on February 23, 2011, this ownership had a gross value of $711 million. As a consequence of the merger, our ownership interest in Archer was reduced from 52.3% to 36.4%, and as such, Archer was deconsolidated as of February 23, 2011.

A change in control is considered a re-measurement event; therefore, upon losing control of Archer, we re-measured at fair value any retained equity interest in the former subsidiary.

(In US$ millions)	December 31, 2011
Fair value of the consideration received		-
Fair value of the retained non-controlling investment		711
The carrying amount of non-controlling interest in Archer		330
The carrying amount of Archer's assets and liabilities		(564)
Accumulated translation adjustments recycled from OCI into profit & loss		70
Accumulated actuarial loss recycled from OCI into profit & loss		(7)
Total gain		540

Subsequent to the deconsolidation, the Company purchased shares in Archer for $167 million, increasing our ownership to 39.9%. The total carrying value was impaired in 2012 and 2011, refer note 10 "Impairment loss on marketable securities and investments in associated companies."

In August 2010, Archer issued 115,400,000 new shares of par value $2.00 each at a price of NOK23.00 per share, raising a total of NOK2.6 billion. The Company subscribed for 34,873,000 of the new shares and, at the same time purchased an additional 1,757,000 shares. As a result, the Company's shareholding was reduced from 73.8% to 52.3%. Following the FASB authoritative guidance amending the accounting and reporting requirements for decreases in ownership of a subsidiary, issued in January 2010, this transaction was recorded as non-controlling interest in the balance sheet.

Note 12 – Restricted cash

Restricted cash includes:

(In US$ millions)	December 31, 2012		December 31, 2011
CIRR deposits (see Note below)		270		298
Margin calls related to share forward agreements		69		137
Restricted deposit related to loan facility		5		5
Tax withholding deposits		58		42
Total restricted cash		402		482
Long-term restricted cash (related to CIRR deposits and loan facility)		218		250
Short-term restricted cash		184		232

F-25

Note: CIRR deposits are cash deposited with commercial banks, which match Commercial Interest Reference Rate ("CIRR") loans from Exportfinans ASA, the Norwegian export credit agency (see Note 22). The deposits are used to make repayments of the CIRR loans.

Note 13 – Marketable securities

Marketable securities held by the Company are equity securities considered to be available-for-sale securities or trading securities.

(In US$ millions)	December 31, 2012		December 31, 2011
Original cost		128		24
Unrealized gain on marketable securities		205		-
Carrying value		333		24

Year end 2011 the Company owned a 23.6% share in SapuraCrest Petroleum Bhd, which was accounted for using the equity method investment with income pickup in arrears. On May 17, 2012 SapuraCrest Petroleum Bhd and Kencana Petroleum Bhd merged resulting in dilution of our shareholdings from 23.6% to 11.8% recognizing a gain of $169 million presented in the statement of operations. The investment was consequently transferred from Investment in associated companies to an investment accounted for at fair value as an available-for-sale security. During first half of 2012 we further reduced our ownershare to 6.4% through sale of shares recognizing a gain of $84 million presented in the statement of operations.

The net unrealized holding gains as of December 31, 2012 amounted to $205 million. This represents the unrealized gain on our SapuraKencana investment recorded in accumulated other comprehensive income in the balance sheet.

The net unrealized holding gains as of December 31, 2011 amounted to zero. This represents the net of $1 million unrealized gain recorded in accumulated other comprehensive income in the balance sheet and an unrealized loss of $1 million recorded through the profit and loss statement.

Marketable securities held by us include approximately 81.1% of the partially redeemed Petromena NOK2,000 million bond ("Petromena") and 6.4% of SapuraKencana . Marketable securities and changes in their carrying value are as follows:

(In US$ millions)	Ensco			Petromena		Golden Close			Sapura Kencana			Total
Historic cost at December 31, 2011		5			4		15			-			24
Fair Market value adjustments recognized via OCI		-			-		1			-			1
Fair Market value adjustments recognized via P&L		(1	)		-		-			-			(1	)
Net book value at December 31, 2011		4			4		16			-			24
Additions		-			-		-			237			237
Fair market value adjustments recognized via OCI		-			-		-			84			84
Release of OCI into profit & loss		-			-		(1	)		(84	)		(85	)
Realization of historic cost		(4	)		-		(15	)		(113	)		(132	)
Other than temporary impairments		-			-		-			-			-
Historic cost at Dec 31, 2012		-			4		-			124			128
Fair Market value adjustments recognized via OCI		-			-		-			205			205
Fair Market value adjustments recognized via P&L		-			-		-			-			-
Net book value at December 31, 2012		-			4		-			329			333

F-26

Note 14 – Accounts receivable

Accounts receivable are presented net of allowances for doubtful accounts. The allowance for doubtful accounts receivables at December 31, 2012 was $13 million (2011: $25 million).

The Company did not recognize any bad debt expenses in 2012, 2011, or 2010, but has instead reduced contract revenue for the disputed amounts.

Note 15 – Other current assets

Other current assets include:

(In US$ millions)	December 31, 2012		December 31, 2011
Prepaid expenses		89		25
Deferred charges – short term portion		24		26
Accrued revenue		15		-
Unrealized gain on total return swap agreements		7		11
Reimbursable amounts due from customers		49		154
Favorable contracts		2		12
Other		123		95
Total other current assets		309		323

Note 16 – Investment in associated companies

The Company has the following investments that are recorded using the equity method:

	December 31, 2012			December 31, 2011			December 31, 2010
SapuraCrest Bhd ("SapuraCrest")*		-	*		23.6	%		23.6	%
Varia Perdana Sdn Bhd ("Varia Perdana")		49.0	%		49.0	%		49.0	%
Tioman Drilling Company Sdn Bhd ("Tioman")		49.0	%		49.0	%		49.0	%
C6 Technologies AS ("C6")***		-			-			50.0	%
Archer ("Archer")***		39.9	%		39.9	%		-
Asia Offshore Drilling ("AOD")**		66.2	%		33.8	%		-
Sevan Drilling ("Sevan Drilling")		28.5	%		28.5	%		-
Seabras Sapura Participacoes SA ("Seabras Sapura Participacoes")		50	%		-			-
Seabras Sapura Holdco Ltd ("Seabras Sapura Holdco")		50	%		-			-
Itaunas Drilling B.V. ("Itaunas Drilling")		30	%		-			-
Camburi Drilling B.V. ("Camburi Drilling")		30	%		-			-
Sahy Drilling B.V. ("Sahy Drilling")		30	%		-			-

* In 2012, the Company's ownership share in SapuraCrest Petroleum Bhd was reduced from 23.5% to 6.3%. This is now accounted for as available-for-sale marketable securities.

**During 2012 the Company's ownership in AOD increased from 33.8% to 66.2%. Even though the Company has 66.2% ownership in AOD, the Company does not have control and therefore, we do not consolidate AOD into Seadrill's financial statements as of December 31, 2012.  We continue to account for this as an equity method investment.

*** In February 2011, we deconsolidated our majority-owned subsidiary Archer (formerly Seawell Limited). Archer is now accounted for as an associated company.

F-27

Summarized balance sheet information of the Company's equity method investees is as follows:

	As of December 31, 2012
(In US$ millions)	Current assets		Non-current assets		Current liabilities		Non-current liabilities
Varia Perdana		98		154		37		-
Tioman		82		1		61		-
Archer		639		1,945		685		972
AOD		32		141		6		-
Sevan Drilling		133		1,586		266		791
Seabras Sapura Participacoes		-		42		-		-
Seabras Sapura Holdco		-		117		-		117
Itaunas Drilling		5		114		109		-
Camburi Drilling		4		121		113		-
Sahy Drilling		2		109		66		36
TOTAL		995		4,330		1,343		1,916

	As of December 31, 2011
(In US$ millions)	Current assets		Non-current assets		Current liabilities		Non-current liabilities
SapuraCrest		716		514		505		198
Varia Perdana		136		157		64		33
Tioman		80		-		70		-
Archer		638		2,176		466		1,061
AOD		49		122		3		-
Sevan Drilling		224		1,375		117		810
TOTAL		1,843		4,344		1,225		2,102

Summarized statement of operations information for the Company's equity method investees is as follows:

	Year ended December 31, 2012
(In US$ millions)	Operating revenues		Net operating income			Net income
Varia Perdana		106		85			83
Tioman		157		12			6
Archer		2,191		(322	)		(375	)
AOD		-		(2	)		(2	)
Sevan Drilling		173		11			(12	)
Seabras Sapura Participacoes		-		-			(1	)
Seabras Sapura Holdco		-		-			-
Itaunas Drilling		-		-			-
Camburi Drilling		-		-			-
Sahy Drilling		-		(1	)		(1	)
TOTAL		2,627		(217	)		(302	)

	Year ended December 31, 2011
(In US$ millions)	Operating revenues		Net operating income			Net income
SapuraCrest		866		166			147
Varia Perdana		119		96			96
Tioman		190		(2	)		(4	)
Archer		1,855		(16	)		(77	)
AOD		-		(4	)		(4	)
Sevan Drilling		116		8			(50	)
TOTAL		3,146		248			108

F-28

	Year ended December 31, 2010
(In US$ millions)	Operating revenues		Net operating income			Net income
SapuraCrest		1,043		118			122
Varia Perdana		164		99			99
Tioman		247		9			5
C6		-		(1	)		(1	)
TOTAL		1,454		225			225

SapuraCrest is a company incorporated and listed on the Malaysian stock exchange, which provides drilling and related services to offshore oil and gas industries in Malaysia and other countries.

Varia Perdana is a company incorporated in Malaysia, which operates a fleet of tender rigs. It is 51% owned by SapuraCrest Bhd and 49% owned by Seadrill.

Tioman is a company incorporated in Malaysia, which provides well services. It is 51% owned by SapuraCrest Bhd. and 49% owned by Seadrill.

Archer is a company listed in Oslo Stock Exchange and provides drilling and well services.

Asia Offshore Drilling was established by Mermaid Maritime Public Company Limited in late 2010 when two MOD-V B Class jack-up rigs were ordered at Keppel FELS in Singapore. AOD has additional option agreements for construction of two similar units and the Company is now responsible for the construction supervision, project management and commercial management of all of AODs jack-up rigs.

Sevan Drilling is a Norwegian public limited liability company (ASA), with its tax residency in Norway. The company was listed on the Oslo Axess in May 2011 and transferred to Oslo Stock Exchange in February 2012.

Seabras Sapura Participacoes SA is a company incorporated in Brazil, which currently constructs one pipelying vessel. It is 50% owned by TL Offshore Sdn. Bhd. and 50% owned by Seadrill.

Seabras Sapura Holdco Ltd is a company incorporated in Bermuda, which currently constructs two pipelying vessels. It is 50% owned by TL Offshore Sdn. Bhd. and 50% owned by Seadrill.

Itaunas Drilling BV is a company incorporated in Holland, which currently constructs a Drillship. It is 70% owned by Sete International GmbH and 30% owned by Seadrill.

Camburi Drilling BV is a company incorporated in Holland, which currently constructs a Drillship. It is 70% owned by Sete International GmbH and 30% owned by Seadrill.

Sahy Drilling BV is a company incorporated in Holland, which currently constructs a Drillship. It is 70% owned by Sete International GmbH and 30% owned by Seadrill.

At the year-end the book values of the Company's investment in associated companies are as follows:

(In US$ millions)	December 31, 2012		December 31, 2011
SapuraCrest		-		106
Tioman		7		1
Varia Perdana		108		102
Archer		121		393
AOD		117		53
Sevan Drilling		66		66
Seabras Sapura Participacoes		21		-
Seabras Sapura Holdco		59		-
Itaunas Drilling		3		-
Camburi Drilling		4		-
Sahy Drilling		3		-
Total		509		721

F-29

The quoted market prices for Archer, AOD and Sevan Drilling as at December 31, 2012, were $121 million, 137 million and 68 million, respectively. Quoted market prices for all our other equity investments are not available because these companies are not publicly traded

At year-end the share of recorded equity in the statutory accounts of the Company's associated companies are as follows:

(In US$ millions)	December 31, 2012		December 31, 2011		December 31, 2010
SapuraCrest		-		124		112
Tioman		10		5		7
Varia Perdana		105		96		100
C6		-		-		6
Archer		370		514		-
AOD		110		57		-
Sevan Drilling		189		188		-
Seabras Sapura Participacoes		22		-		-
Seabras Sapura Holdco		-		-		-
Itaunas Drilling		3		-		-
Camburi Drilling		4		-		-
Sahy Drilling		3		-		-
Total		816		984		225

Note 17 – Newbuildings

(In US$ millions)	December 31, 2012		December 31, 2011
Opening balance		2,531		1,247
Additions		1,267		2,308
Capitalized interest and loan related costs		76		73
Re-classified as Drilling Units		(1,992)		(1,097	)
Closing balance		1,882		2,531

Note 18 – Drilling units

(In US$ millions)	December 31, 2012		December 31, 2011
Cost		15,177		12,898
Accumulated depreciation		(2,283)		(1,675)
Net book value		12,894		11,223

Depreciation and amortization expense was $608 million, $547 million and $448 million for the years ended December 31, 2012, 2011 and 2010, respectively.

Note 19 – Goodwill and other intangible assets

There have been no business acquisitions for the year ended December 31, 2012.

In January 2011, our subsidiary Archer (formerly named Seawell) acquired Universal Wireline for $26 million on a debt and cash free basis, however Universal was deconsolidated together with Archer in February 2011. There were no other acquisitions in 2011.

As described in Note 2 "Accounting policies", the Company tests the value of goodwill at the end of each financial year and if the book value exceeds the fair value an impairment loss is taken. In the years ended December 31, 2012, 2011 and 2010 no impairment losses were recognized.

F-30

Goodwill:

(In US$ millions)	December 31, 2012		December 31, 2011
Net book balance at January 1		1,320		1,676
Goodwill acquired during the year		-		-
Impairment losses		-		-
Currency adjustments		-		15
Deconsolidation Archer		-		(371)
Net book balance of December 31		1,320		1,320

Other intangible assets:

Other intangible assets relate to customer relationships, technology and trademarks within the operating segment Well Services.

(In US$ millions)	December 31, 2012		December 31, 2011
Net book balance at January 1		-		57
Intangible assets acquired during the year		-		-
Depreciation		-		-
Deconsolidation Archer		-		(57)
Net book balance of December 31		-		-

Note 20 – Equipment

Equipment consists of office equipment, furniture and fittings.

(In US$ millions)	December 31, 2012			December 31, 2011
Cost		62			40
Accumulated depreciation		(22	)		(15	)
Net book value		40			25

Depreciation and amortization expense was $7 million, $16 million and $27 million for the years ended December 31, 2012, 2011 and 2010, respectively.

Note 21 – Other non-current assets

(In US$ millions)	December 31, 2012		December 31, 2011
Other non-current assets consists of:
Deferred charges – long-term portion		74		65
Deferred tax effect of internal transfer of assets		140		149
Favorable contracts		-		2
Deferred mobilization costs – long-term portion		118		-
Other		70		18
Total  other non-current assets		402		234

F-31

Deferred charges represent debt arrangement fees that are capitalized and amortized to interest expense over the life of the debt instrument.

(In US$ millions)	December 31, 2012			December 31, 2011
Debt arrangement fees		241			204
Accumulated amortization		(143	)		(113	)
Total book value		98			91
Less: Short-term portion		(24	)		(26	)
Long-term portion		74			65
Amortization for the period		30			31

Note 22 – Long-term interest bearing debt and interest expenses

As of December 31, 2012 and 2011, the Company had the following debt facilities:

(In US$ millions)	December 31, 2012		December 31, 2011
Credit facilities
$1,500 facility		882		1,059
$800 facility		227		272
$585 facility		-		337
$100 facility		69		74
$700 facility		560		630
$1,200 facility		867		1,000
$900 facility		731		-
$440 facility		101		-
$1,121 Lloyd's facility		1,019		985
$2,000 facility (North Atlantic)		1,750		1,917
$170 facility		83		92
$550 facility		495		550
$400 facility		360		400
Total Bank Loans + other		7,144		7,316
Ship Finance International Loans
$700 facility		397		470
$1,400 facility		822		939
Total Ship Finance Facilities		1,219		1,409
Bonds and convertible bonds
Bonds		1,567		425
Convertible bonds		561		545
Total Bonds		2,128		970
Other credit facilities with corresponding restricted cash deposit		270		298
Total interest bearing debt		10,761		9,993
Less: current portion		(2,066)		(1,419)
Long-term portion of interest bearing debt		8,695		8,574

The outstanding debt as of December 31, 2012 is repayable as follows:

(In US$ millions)	December 31, 2012
2013		2,066
2014		1,738
2015		1,904
2016		1,017
2017 and thereafter		4,125
Effect of amortization of convertible bond		(89	)
Total debt		10,761

F-32

Credit facilities

$1,500 million secured credit facility

In June 2009, the Company entered into a $1,500 million senior secured loan facility with a syndicate of banks and export credit facility agents, to partly fund the acquisition of the jack-up rigs West Capella, West Sirius, West Ariel and West Aquarius, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,733 million. The facility bears interest at LIBOR plus 3.25% per annum and is repayable over a term of five years. The outstanding balance at December 31, 2012 was $882 million, as compared to $1,059 million in 2011. At maturity a balloon payment of $662 million is due. We do not have any undrawn capacity on this facility at year end.

$800 million secured term loan

In August 2005, the Company entered into a $300 million secured term loan facility with a syndicate of banks to partly fund the acquisition of two semi-submersible rigs, West Eminence and West Phoenix, which have been pledged as security. The facility was amended and increased in 2006 to $800 million. The facility was amended again in 2011 due to West Phoenix was moved to North Atlantic Drilling Ltd. As a result of this, only West Eminence was pledged as security as per December 31, 2012. The net book value at December 31, 2012 of the unit pledged as security is $631 million. The facility consists of two tranches, and bears interest at LIBOR plus 1.70% and 3.5% per annum. As of December 31, 2012, the outstanding balance was $227 million, as compared to $272 million in 2011. The final repayment of $183 million is due in 2013. We do not have any undrawn capacity on this facility at year end.

$100 million secured term loan

In April 2008, the Company entered into a $100 million secured term loan facility with two banks to partly fund the acquisition of the tender rig T-11, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $79 million. The facility bears interest at a fixed rate of 3.03% per annum and is repayable over a term of six years. As of December 31, 2012, the outstanding amount on this facility was $69 million, as compared to $74 million in 2011. At maturity a balloon payment of $60 million is due. We do not have any undrawn capacity on this facility at year end.

$700 million secured term loan

In October 2010, the Company entered into a $700 million secured loan facility with a syndicate of banks to partly fund the acquisition of seven jack-up drilling rigs, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,126 million. The facility bears interest at LIBOR plus 2.50% per annum and is repayable over a term of five years. As of December 31, 2012, the outstanding balance was $560 million, as compared to $630 million in 2011. At maturity a balloon payment of $350 million is due in October 2015. We do not have any undrawn capacity on this facility at year end.

$1,200 million secured term loan

In June 2010, the Company entered into a $1,200 million secured facility with a group of various commercial lending institutions and export credit agencies. The loan is secured by first priority mortgages on one ultra-deepwater semi-submersible drilling rig (West Orion), one ultra-deepwater drillship (West Gemini) and one tender rig (West Vencedor). The net book value at December 31, 2012 of the units pledged as security is $1,477 million. The facility bears interest at LIBOR plus 2.25% per annum and is repayable over a term of five years. The outstanding balance as of December 31, 2012, was $867 million, as compared to $1,000 million in 2011. At maturity a balloon payment of $567 million is due. We do not have any undrawn capacity on this facility at year end. We have subsequent to the balance sheet date entered into a renewal of the fixed margin period on the facility commencing on June 25, 2013, with a final maturity in 2015.

$900 million secured term loan

In July 2012, the Company refinanced $585 million loan and entered into new $900 million senior secured credit facility with a group of commercial lending institutions, comprised of a term loan in the amount of $375 million, a term loan in the amount of $150 million, and a revolving facility in the amount of $375 million. This facility has a five year term, and is repayable in quarterly installments of $18.8 million for the first three installments, followed by quarterly installments of $22.5 million thereafter, with a balloon payment of $484 million due at maturity. The facility bears interest at LIBOR plus a margin. The tender rigs West Alliance, West Berani, West Menang, West Pelaut, West Setia, West Jaya, West Esperanza and T-12 are pledged as security. The $585 million facility, which had $312 million outstanding, was repaid with a portion of this facility.  As of December 31, 2012, the outstanding balance of this facility was $731 million.

F-33

$440 million secured term loan

In December 2012, the Company entered into a $440 million secured term loan facility with a syndicate of banks to fund the delivery of two tender rigs and two jack-up drilling rigs currently under construction. As of December 31, 2012 we have drawn $101 million on the facility and T-15 has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $112 million. The facility bears interest at LIBOR plus 3.25% per annum and is repayable over a term of five years. The outstanding balance as at December 31, 2012 was $100.5 million. The undrawn amount will be available at delivery of the rigs under construction. At maturity a balloon payment of $223 million is due. We do not have any undrawn capacity on this facility at year end.

$1,121 million secured credit facility

In January 2011, the Company entered into a $1,121 million secured credit facility with Lloyds TSB to fund the acquisition of two ultra-deepwater semi-submersible rigs, West Leo and West Pegasus, which has been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,248 million. In 2012 we have further drawn down on this facility for general corporate purposes. The facility bears interest at LIBOR plus a margin and is repayable over a term of seven years. The facility was fully drawn as of December 31, 2012 with a balance of $1,019 million, as compared to $985 million in 2011. At maturity a balloon payment of $498 million is due. We do not have any undrawn capacity on this facility at year end.

$2,000 million secured credit facility

In April 2011, our subsidiary North Atlantic Drilling Ltd entered into a $2,000 million secured credit facility with a syndicate of banks to partly fund the acquisition of six drilling units from Seadrill Ltd, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $2,417 million. The facility has a six year term and bears interest at LIBOR plus 2.00% per annum. As of December 31, 2012, the outstanding balance was $1,750 million, as compared to $1.9 billion in 2011. At maturity a balloon payment of $1,000 million is due. We do not have any undrawn capacity on this facility at year end.

$170 million secured loan facility

In February 2007, the Company entered into a sale and leaseback agreement for the jack-up rig West Prospero with Rig Finance II Ltd, at that time a subsidiary of Ship Finance Limited. In February 2007 Rig Finance II Ltd entered into a $170 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Prospero, which has been pledged as security. In June 2011, the Company acquired all the shares of Rig Finance II Limited. The net book value at December 31, 2012 of the unit pledged as security is $176 million. The facility bears interest at LIBOR plus 0.90 % to 1.20% per annum depending on the ratio of market value to loan, and is repayable over a term of six years. As of December 31, 2012, the outstanding balance was $83 million, as compared to $92 million in 2011. At maturity a balloon payment of $79 million is due. We do not have any undrawn capacity on this facility at year end.

$550 million secured credit facility

In December 2011, the Company entered into a $550 million secured credit facility with a syndicate of banks to partly fund the delivery of the ultra-deepwater semi-submersible drilling unit West Capricorn, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $712 million. The facility has a five year tenor and bears interest at LIBOR plus a margin. As of December 31, 2012, the outstanding balance was $495 million, as compared to $550 million in 2011. At maturity a balloon payment of $275 million is due. We do not have any undrawn capacity on this facility at year end.

$400 million secured credit facility

In December 2011, the Company entered into a $400 million secured credit facility with a syndicate of banks. The Jack-Up rigs West Cressida, West Callisto, West Leda and West Triton has been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $727 million. The facility has a five year term and bears interest of LIBOR plus 2.50% per annum. As of December 31, 2012, the outstanding balance was $360 million, as compared to $400 million in 2011. At maturity a balloon payment of $200 million is due. We do not have any undrawn capacity on this facility at year end.

F-34

Ship Finance International Loans

In May 2008, the Company entered into a sale and leaseback agreement for the drillship West Polaris with SFL West Polaris Limited, a subsidiary of Ship Finance. SFL West Polaris Limited is consolidated as a VIE by the Company. In July 2008 SFL West Polaris Limited entered into a $700 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Polaris, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $594 million. The facility bears interest at LIBOR plus 1.25% per annum and is repayable over a term of five years. At December 31, 2012, the outstanding balance under the facility was $397 million, as compared to $470 million in 2011.

In September 2008, the Company entered into a sale and leaseback agreement for the two semi-submersible rigs West Taurus and West Hercules with SFL Deepwater Ltd, a subsidiary of Ship Finance. SFL Deepwater Ltd is consolidated as a VIE by the Company. In September 2008, SFL Deepwater Ltd entered into a $1,400 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Taurus and West Hercules, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,035 million. The facility bears interest at LIBOR plus 1.40% per annum and is repayable over a term of five years. As of December 31, 2012, the outstanding balance under the facility was $822 million, as compared to $939 million in 2011.

$585 million secured term loan

In December 2006, we entered into a $585 million secured term loan facility with a syndicate of banks to partly fund the acquisition of eight tender rigs, which have been pledged as security. The facility bears interest at LIBOR plus a margin. This facility was fully repaid and refinanced in July 2012, and therefore the balance outstanding as at December 31, 2012 was nil (2011: $337 million).

Bonds and convertible bonds

$350 million fixed interest rate bond

In October 2010, the Company raised $350 million through the issue of a five year bond which matures in October 2015. Interest on the bonds bears a fixed interest of 6.50% per annum, payable semi-annually in arrears. In May 2012, we repurchased $8 million of the bonds.  As of December 31, 2012, the outstanding balance was $342 million, as compared to $350 million in 2011.

NOK1,250 million floating interest rate bond

In January 2012, the Company raised $225 million (NOK1,250 million) through the issue of a two year senior unsecured bond, with maturity date of February 13, 2014. The bond bears interest of NIBOR plus 3.25% per annum, payable quarterly in arrears. The bond is listed on the Oslo Stock Exchange.

$1,000 million fixed interest bond

In September 2012, the Company raised $1,000 million through the issue of a five year bond which matures in September 2017. Interest on the bonds bears a fixed interest of 5.625% per annum, payable semi-annually in arrears.

3.375% Convertible Bonds due 2017

In October 2010, the Company issued at par $650 million of convertible bonds. Interest on the bonds is fixed at 3.375%, payable semi-annually in arrears. The bonds are convertible into Seadrill Limited common shares at any time up to ten banking days prior to October 27, 2017. The conversion price at the time of issuance was $38.92 per share, representing a 30% premium to the share price at the time. Since then, dividend distributions have reduced the conversion price to $31.14. For accounting purposes $121 million was, at the time of issuance of the bonds, allocated to the bond equity component and $529 million to the bond liability component. This is due to the cash settlement option stipulated in the bond agreement. Unless previously redeemed, converted or purchased and cancelled, the bonds mature in October 2017. The convertible bonds are tradable, and their market price as of March 13, 2013 was 135% of nominal value. If the bonds were converted into shares at the current conversion price of $31.1364, a further 20,875,888 new shares would be issued. The bond contains covenants, the principle one requiring the Company to maintain a market adjusted equity ratio of at least 30.0%.

F-35

NOK 500 million floating interest rate bonds

In September 2005, we raised NOK500 million through the issuance of a seven year bond. The bond bears quarterly interest at the Norwegian Inter-Bank Offer Rate, or NIBOR, plus a margin. We later repurchased NOK391.5 million of the bonds. The bond was repaid upon final maturity in September 2012, therefore the balance outstanding as at December 31, 2012 was nil (2011: $75 million).

Commercial Interest Reference Rate (CIRR) Credit Facilities

In April 2008, the Company entered into a CIRR term loan for NOK850 million with Eksportfinans ASA, the Norwegian export credit agency. The loan bears fixed interest at 4.56% per annum and is repayable over a term of eight years. The outstanding balance at December 31, 2012 was $72 million (NOK400 million), $83 million, in 2011.

In June 2008, the Company entered into a CIRR term loan for NOK904 million with Eksportfinans ASA. The loan bears fixed interest at 4.15% per annum and is repayable over a term of eight years. The outstanding balance at December 31, 2012 was $77 million (NOK425 million), $89 million, in 2011.

In July 2008, the Company entered into a CIRR term loan for NOK1,011 million with Eksportfinans ASA. The loan bears fixed interest at 4.15% per annum and is repayable over a term of twelve years. The outstanding balance at December 31, 2012 was $121 million (NOK674 million), $126 million, in 2011

In connection with the above three CIRR fixed interest term loans totaling $270 million (NOK1,499 million), fixed interest cash deposits equal to the total outstanding loan balances have been established with commercial banks. The collateral cash deposits are reduced in parallel with repayments of the CIRR loans and receive fixed interest at the same rates as those paid on the CIRR loans. The collateral cash deposits are classified as "restricted cash" in the balance sheet, and the effect of these arrangements is that the CIRR loans have no effect on net interest bearing debt.

Covenants on loans and bonds

Bank Loans

In addition to security provided to lenders in the form of pledged assets, bank loan agreements generally contain financial covenants, the main ones being as follows:

— Aggregated minimum liquidity requirement for the group: to maintain cash and cash equivalents of at least $155 million within the group.

— Interest coverage ratio: to maintain an EBITDA to interest expense ratio of at least 2.5:1.

— Current ratio: to maintain current assets to current liabilities ratio of at least 1:1. Current assets are defined as book value less minimum liquidity, but including up to 20.0% of shares in listed companies owned 20.0% or more. Current liabilities are defined as book value less the current portion of long term debt.

— Equity ratio: to maintain total equity to total assets ratio of at least 30.0%. Both equity and total assets are adjusted for the difference between book and market values of drilling units.

— Leverage ratio: to maintain a ratio of net debt to EBITDA no greater than 4.5:1. Net debt is calculated as all interest bearing debt less cash and cash equivalents excluding minimum liquidity requirements. In the event that Seadrill acquire a rig without historic EBITDA available, Seadrill is entitled to base a twelve months historical EBITDA calculation on future projected EBITDA subject to the following:

F-36

the rig have a firm charter contract at the time of delivery with a minimum duration of 12 months and a firm charter contract in place at the time of such EBITDA calculation.

Bonds

For the Company's outstanding bonds, the main covenants are as follows;

— Equity Ratio; to maintain a total equity to total assets ratio of at least 30.0%. Both equity and total assets are adjusted for the difference between book value and market values of drilling units.

— Equity ratio, which requires us to maintain a ratio of adjusted equity to total liabilities of at least 40%. Adjusted shareholder's equity is book value of equity adjusted for the difference between book and market values of drilling units.

We are in compliance with all financial loan covenants as of December 31, 2012.

Note 23 – Other current liabilities

Other current liabilities are comprised of the following:

(In US$ millions)	December 31, 2012		December 31, 2011
Taxes payable		322		309
Employee withheld taxes, social security and vacation payment		83		95
Accrued interest expense		54		30
Liabilities relating to investment in shares (1)		5		-
Deferred mobilization revenues – short-term portion		96		115
Derivative financial instruments (2)		397		414
Accrued expenses		341		279
Other current liabilities		40		72
Total other current liabilities		1,338		1,314

(1) Liabilities relating to the Company's share forward contracts are recorded as short-term debt.

(2) Derivative financial instruments consist of unrealized losses on various types of derivatives.

Note 24 – Other non-current liabilities

Other non-current liabilities are comprised of the following:

(In US$ millions)	December 31, 2012		December 31, 2011
Accrued pension liabilities		55		43
Deferred mobilization revenues – long-term portion		225		130
Other non-current liabilities		8		15
Total other non-current liabilities		288		188

Note 25 – Business Acquisitions

Acquisitions in 2012

There have been no business acquisitions in the year ended December 31, 2012.

F-37

Acquisitions in 2011

In January 2011, our then subsidiary Archer acquired Universal Wireline for $26 million on a debt and cash free basis, however Universal Wireline was deconsolidated together with Archer in February 2011. There were no other business acquisitions in the year ended December 31, 2011.

Acquisitions in 2010

Scorpion Offshore Ltd ("Scorpion")

Scorpion was established and incorporated in Bermuda with the purpose of operating a fleet of offshore drilling rigs and is listed on the Oslo Stock Exchange. Seadrill acquired its first shares in Scorpion and entered into forward contracts for the purchase of Scorpion shares in early 2008. In April 2010, Seadrill increased its ownership to 40.0 percent at a price per Scorpion share of NOK36.00. At that time Scorpion had a fleet of seven premium jack-up rigs with operations in South America, Middle East and South East Asia. In late May 2010, Seadrill increased its ownership to 50.1 percent of the outstanding shares and simultaneously announced a bid of NOK40.50 per share for the remaining outstanding shares that was launched on June 4, 2010. On July 19, 2010, it was announced that the holders of 48.7 percent of the total number of outstanding shares had accepted the offer increasing our ownership to 98.8 percent of the outstanding shares and votes in Scorpion. On September 20, 2010, Seadrill informed remaining Scorpion shareholders of its intention to exercise its right under Bermuda company law to compulsory acquire all remaining outstanding shares in Scorpion. The compulsory acquisition was completed on October 25, 2010 and the company's shares were delisted from the Oslo Stock Exchange on November 17, 2010.

Seadrill has applied the purchase method in this business combination. As part of the process, a valuation analysis has been performed to determine the fair values of identifiable assets and liabilities of Scorpion as of the acquisition date. The determination of the value of these components required the Company to make various estimates and assumptions. Critical estimates in valuing certain of the intangible assets include but are not limited to the net present value of future expected cash flows from operations.

The allocation of the purchase price of Scorpion was based upon fair value studies.

Acquisition consideration was as follows:

(In US$ millions)
Cash	57
Fair Value of previously held 40% equity interest	226
Fair Value of Non Controlling Interests	282
Total acquisition consideration	565

On May 28, 2010 the Company acquired control of Scorpion, and re-measured the previously held 40.0% equity interest to its fair value. The difference between the $115 million book value and the $226 million fair value of the previously held 40.0% interest was recorded as a gain on a separate line item under financial items in the consolidated statement of operations in the year ended December 31, 2010.

As a result of the acquisition of control, we also recognized a gain on a bargain purchase as the cost of acquisition is less than the fair value of the net assets of the subsidiary acquired. We subsequently performed a reassessment of the values of all assets acquired, liabilities assumed, and consideration transferred. The reassessment confirmed our initial gain on bargain purchase.

During the third and fourth quarter of 2010, the Company acquired the remaining shares in Scorpion for a total amount of $292 million, increasing the Company's ownership in Scorpion to 100% of the outstanding shares as of December 31, 2010. With effect from June 1, 2010, the results of Scorpion's operations were included in our consolidated financial statements.

Gray Wireline Service, Inc

In December 2010, Archer, acquired Gray Wireline Service, Inc. ("Gray"), an independent cased hole wireline company in the U.S. The purchase price was US$ 161 million.

F-38

Rig Inspection Services Limited

In August 2010, Archer acquired Rig Inspection Services Limited ("RIS"), a private company with offices in Singapore and Australia. The purchase price was US$ 9 million.

The purchase price of the acquired companies has been allocated as follows:

(In US$ millions)	Scorpion		Gray		RIS		Total
Assets:
Intangible assets		-		36		2		38
Goodwill		-		80		5		85
Fixed assets		1,234		44		-		1,278
Receivables and other current assets		210		33		3		246
Total assets		1,444		193		10		1,647
Liabilities:
Deferred tax		-		25		-		26
Payables and other current liabilities		823		8		1		831
Total liabilities		823		33		1		857
Purchase Price		565		161		9		735
Gain on bargain purchase		56		-		-		56

Note 26 – Non-controlling interest

The Company's consolidated Statement of Operations, Balance Sheet and Statement of Cash Flows include North Atlantic Drilling Ltd, whose issued share capital is 73.2% and Seadrill Partners LLC, whose issued share capital is 75.7% owned by the Company. The part of North Atlantic Drilling Ltd and Seadrill Partners LLC's total shareholders' equity not attributable to the Company is included in non-controlling interest.

On October 24, 2012, Seadrill Partners LLC completed its IPO of 10,062,500 common units representing limited liability company interests in Seadrill Partners LLC at a price of US$22.00 per unit, for gross proceeds of US$221.4 million and expenses of US$18.7 million (including 1,312,500 common units issued in connection with the exercise of the over-allotment option). Seadrill Partners LLC is listed on the New York stock exchange ("NYSE") under the symbol "SDLP". Upon completion of the offering, Seadrill Limited owned 14,752,525 common units and 16,543,350 subordinated unites which is 75.7% of the limited liability company interests in Seadrill Partners LLC. Seadrill Partners' only cash generating assets are its ownership interest in Seadrill Operating LP and Seadrill Capricorn Holdings LLC (collectively, "OPCO"). OPCO's fleet consists of two ultra-deepwater semi-submersible rigs (the West Aquarius and the West Capricorn), one ultra-deepwater drillship (the West Capella), and one semi-tender rig. (the West Vencedor), all of which operate under long-term contracts.

In 2007 and 2008 the Company entered into five sale and leaseback arrangements for drilling rigs with Ship Finance, who incorporated subsidiary companies for the sole purpose of owning and leasing the rigs. The Company has recognized these subsidiary companies as VIEs and concluded that Seadrill is their primary beneficiary. Accordingly, these subsidiary companies are included in the Company's consolidated accounts, with the Ship Finance equity in these companies included in non-controlling interest. In 2011, the Company acquired all the shares in one of these Ship Finance companies, Rig Finance II Ltd for $47 million. As a consequence of this, Rig Finance II Ltd is no longer treated as a VIE but a wholly owned subsidiary.

Changes in non-controlling interest in 2012, 2011 and 2010 are as follows:

(In US$ millions)	Scorpion		Archer			Ship Finance			North Atlantic		Seadrill Partners LLC		Total
December 31, 2010		-		326			213			-		-		539
Changes in 2011		-		(320	)		(46	)		71		-		(295	)
2011 net (loss)/income		-		(6	)		48			39		-		81
December 31, 2011		-		-			215			110		-		325
Changes in 2012		-		-			20			10		69		99
2012 net (loss)/income		-		-			39			48		10		97
December 31, 2012		-		-			274			168		79		521

F-39

Note 27 – Share capital

	2012					2011						2010
All shares are common shares of $2.00 par value each	Shares			$millions		Shares			$millions			Shares			$millions
Authorized share capital		800,000,000			1,600		800,000,000			1,600			800,000,000			1,600
Issued and fully paid share capital		469,250,933			938		469,250,933			938			443,308,487			887
Treasury shares held by Company		(72,859	)		-		(1,478,759	)		(3	)		(182,796	)		(1	)
Outstanding shares in issue		469,178,074			938		467,772,174			935			443,125,691			886

As of December 31, 2012, the Company's shares are listed on the Oslo Stock Exchange and the New York Stock Exchange.

The Company was incorporated on May 10, 2005 and 6,000 ordinary shares of par value $2.00 each were issued. Since incorporation the number of issued shares has increased from 6,000 to 469,250,933 of par value $2.00 each as of December 31, 2012. There were no new shares issued in 2012, the number of shares issued in 2011 was 25,942,446, all due to conversion of convertible debt instruments.

A share repurchase program was approved by the Board in 2007 giving the Company the authorization to buy back shares. Shares bought back under the authorization may be cancelled or held as treasury shares. Treasury shares may be held to meet the Company's obligations relating to the share option plans (see Note 28). As at December 31, 2012 the Company held 72,859 treasury shares and net shares outstanding at December 31, 2012 were 469,178,074.

Note 28 – Share option plans

The fair value of share options granted is recognized as personnel expenses, and in the year ended December 31, 2012, $8 million (2011: $10 million) were expensed in the income statement. These expenses have no effect on income taxes in the financial statements. However if the option is exercised a tax benefit will be recorded, as the gain is recorded as deductible for tax purposes. If the Company has to expense social security taxes related to the benefit of options exercised such expenses will be recorded at the exercise date.

In May 2005, a general meeting of the Company approved authorizing the Board of Directors to establish and maintain an option scheme (the "Seadrill Scheme") for encouraging the holding of shares in the Company. The Seadrill Scheme will expire in May 2016.  The Seadrill Scheme permits the board of directors, at its discretion, to grant options to acquire shares in the Company to employees and directors of the Company or its subsidiaries.  The options are not transferable. The subscription price is at the discretion of the board of directors, provided the subscription price is never reduced below the par value of the share. The subscription price for certain options granted under the scheme will be reduced by the amount of all dividends declared by the Company in the period from the date of grant until the date the option is exercised. Options granted under the scheme will vest at a date determined by the board at the date of the grant.  The options granted under the plan to date vest over a period of one to five years.  There is no maximum number of shares authorized for awards of equity share options and authorized, unissued or treasury shares of the Company may be used to satisfy exercised options.

During 2012, 181,012 share options were granted. The assumptions used in estimating fair value are as follows: 0.67% risk-free interest rate, volatility of 24.3%, 0% dividend yield and an expected option term of four years. The risk-free interest rates were estimated using the US Treasury yield curve in effect at the time of grant for instruments with a similar life. The dividend yield has been estimated at 0% as the exercise price is reduced by all dividends declared by the Company from the date of grant to the exercise date.  It is also assumed that 100% of options granted will vest.

F-40

The following summarizes share option transactions related to the Seadrill Scheme in 2012, 2011 and 2010:

	2012				2011					2010
	Options		Weighted average exercise price US$		Options			Weighted average exercise price US$		Options			Weighted average exercise price US$
Outstanding at beginning of year		5,420,438		26.16		5,512,400			20.30		6,199,833			13.87
Granted		181,012		37.41		1,786,771			34.68		1,910,000			29.94
Exercised		(1,415,000)		16.39		(1,638,165	)		16.33		(2,329,000	)		11.88
Forfeited		(312,559)		30.84		(240,568	)		21.98		(268,433	)		14.99
Outstanding at end of year		3,875,891		29.88		5,420,438			26.16		5,512,400			20.30
Exercisable at end of year		1,164,214		21.19		1,598,412			19.82		1,645,333			16.03

Options granted in 2006 had initial exercise prices between $2.23 and NOK102 ($16.28) per share, could be exercised one third each year beginning 12 months after they were granted, and expired between May 2010 and September 2011. Options granted in 2007 had initial exercise prices between NOK98.63 ($15.23) and NOK129.63 ($22.35) per share, could be exercised one third each year beginning 12 months after they were granted, and expired in September 2011. Options granted in 2008 had been repriced with exercise prices now being NOK 90.83 ($14.09) and NOK104.64 ($16.24) per share; they may be exercised one third each year beginning 12 months after they were granted, and expire in May 2014. These same prices and dates apply to the options granted in 2009. Options granted in April 2010 had exercise price of NOK 137.40 ($23.13), may be exercised one third after 12 or 15 months and expire in March/June 2015. Options granted in November 2010 had exercise prices of NOK 192.90 ($31.4) for American citizens or residents and NOK 185.20 ($31.06) for non-Americans. They may be exercised one fifth each year beginning 12 months after they were granted and expire in December 2015. Options granted in November 2011 had exercise prices of NOK202.10 ($34.68) and can be exercised one fourth at a time, after the first 18, 36, 48 and 60 months from the grant date. They expire in December 2016. During 2012, there were 181,012 options granted in different dates and with different strike prices, ranging from NOK 202,10 to NOK 224,53. They have the same exercise schedule as the 2011's grant and expire between December 2016 and December 2017.

The weighted average grant-date fair value of options granted during 2012 is $7.06 per share (2011: $7.07 per share, 2010: $8.96 per share).

As of December 31, 2012 there was $ 11 million in unrecognized compensation costs relating to non-vested options granted under the Options Schemes (2011: $20 million). This amount will be recognized as expense of $6 million in 2013, $3 million in 2014, $2 million in 2015 and less than a million in 2016 and 2017.

There were 3,875,891 options outstanding at December 31, 2012 (2011: 5,420,438). Their weighted average remaining contractual life was 39 months (2011: 45 months) and their weighted average fair value was $7.75 per option (2011: $11.20 per option). The weighted average parameters used in calculating these weighted average fair values are as follows: risk-free interest rate 2.25 % (2011: 2.72%), volatility 28 % (2011: 31%), dividend yield 0% (2011: 0%), option holder retirement rate 0% (2011: 0%) and expected term 5 years (2011: 5 years).

During 2012 the total intrinsic value of options exercised was $40 million (2011: $32 million, 2010: $22 million) on the day of exercise. The intrinsic value of options fully vested but not exercised at December 31, 2012 was $18 million and their average remaining term was 24 months.

Note 29 - Pension benefits

The Company has a defined benefit pension plan covering substantially all Norwegian employees. A significant part of this plan is administered by a life insurance company.

In June 2009 we introduced a defined contribution plan for all new Norwegian employees employed onshore.

F-41

Under the new scheme, the Company contributes to the employee's pension plan amounts ranging into five to eight percent of the employee's annual salary. Existing onshore staff were given an option to join the new scheme or continue with their previous defined benefit plan.

For onshore employees in Norway, continuing with the defined benefit plan, the primary benefits are retirement pension of approximately 66 percent of salary at retirement age of 67 years, together with a long-term disability pension. The retirement pension per employee is capped at an annual payment of 66 percent of the total of 12 times the Norwegian Social Security Base. Most employees in this group may choose to retire at 62 years of age on a pre-retirement pension. Offshore employees in Norway have retirement and long-term disability pension of approximately 60 percent of salary at retirement age of 67. Offshore employees on mobile units may choose to retire at 60 years of age on a pre-retirement pension.

On December 31, 2006, Seadrill adopted the recognition and disclosure provisions of ASC Topic 715 Compensation – Retirement Benefits. ASC Topic 715 requires the recognition of the funded status of the Defined Benefit and Postretirement Benefits Other Than Pensions ("OPEB") plans on the December 31, 2006 balance sheet with a corresponding adjustment to accumulated other comprehensive income. The adjustment to accumulated other comprehensive income at adoption represents the net unrecognized actuarial losses, unrecognized prior service costs, and unrecognized transition obligation remaining from the initial application of ASC Topic 715, all of which were previously netted against the plans' funded status on the balance sheet. These amounts will be subsequently recognized as net periodic pension cost pursuant to our historical accounting policy for amortizing such amounts. Further, actuarial gains and losses that arise in subsequent periods and are not recognized as net periodic pension cost in the same periods will be recognized as a component of other comprehensive income. Those amounts will be subsequently recognized as a component of net periodic pension cost on the same basis as the amounts recognized in accumulated other comprehensive income.

Consolidated balance sheet position

(In US$ millions)	2012			2011
Non-current liabilities		50			15
Deferred tax		(14	)		(4	)
Shareholders equity		(36	)		(11	)

Annual pension cost

(In US$ millions)	2012			2011			2010
Benefits earned during the year		12			9			18
Interest cost on prior years' benefit obligation		5			5			9
Gross pension cost for the year		17			14			27
Expected return on plan assets		(5	)		(5	)		(8	)
Administration charges		-			-			1
Net pension cost for the year		12			9			20
Social security cost		2			1			3
Amortization of actuarial gains/losses		-			-			(1	)
Amortization of net transition assets		(4	)		-			3
Total net pension cost		10			10			19

The funded status of the defined benefit plan

(In US$ millions)	December 31, 2012			December 31, 2011
Projected benefit obligations		171			128
Plan assets at market value		(122	)		(91	)
Accrued pension liability exclusive social security		49			37
Social security related to pension obligations		6			6
Accrued pension liabilities		55			43

F-42

Change in benefit obligations

(In US$ millions)	2012			2011
Benefit obligations at beginning of year		128			215
Deconsolidation of Archer		-			(104	)
Interest cost		5			5
Current service cost		12			9
Benefits paid		(2	)		(2	)
Change in unrecognized actuarial gain		22			8
Foreign currency translations		11			(4	)
Acquisition/transfer members		(5	)		-
Benefit obligations at end of year		171			128

Change in pension plan assets

(In US$ millions)	2012			2011
Fair value of plan assets at beginning of year		91			150
Deconsolidation of Archer		-			(60	)
Estimated return		5			5
Contribution by employer		28			7
Administration charges		-			-
Benefits paid		(2	)		(1	)
Change in unrecognized actuarial loss		(6	)		(8	)
Foreign currency translations		8			(2	)
Acquisition/transfer members		(2	)		-
Fair value of plan assets at end of year		122			91

Pension obligations are actuarially determined and are critically affected by the assumptions used, including the expected return on plan assets, discount rates, compensation increases and employee turnover rates. The Company periodically reviews the assumptions used, and adjusts them and the recorded liabilities as necessary.

The expected rate of return on plan assets and the discount rate applied to projected benefits are particularly important factors in calculating the Company's pension expense and liabilities. The Company evaluates assumptions regarding the estimated rate of return on plan assets based on historical experience and future expectations on investment returns, utilizing the asset allocation classes held by the plan's portfolios. The discount rate is based on the Norwegian government 10 year-bond effective yield. Changes in these and other assumptions used in the actuarial computations could impact the projected benefit obligations, pension liabilities, pension expense and other comprehensive income.

Assumptions used in calculation of pension obligations	2012			2011			2010
Rate of compensation increase at the end of year		3.50	%		4.00	%		4.00	%
Discount rate at the end of year		4.20	%		3.90	%		4.20	%
Prescribed pension index factor		1.40	%		1.10	%		2.00	%
Expected return on plan assets for the year		4.00	%		4.80	%		4.60	%
Employee turnover		3.50	%		4.00	%		4.00	%
Expected increases in Social Security Base		3.25	%		3.75	%		3.75	%
Expected annual early retirement from age 60/62:
Offshore personnel fixed installations								30.0	%
Offshore personnel and onshore employees					50.0	%		50.0	%

F-43

The weighted-average asset allocation of funds related to the Company's defined benefit plan at December 31, was as follows:

Pension benefit plan assets	2012			2011
Equity securities		9.2	%		10.4	%
Debt securities		52.4	%		48.6	%
Real estate		18.3	%		18.0	%
Money market		18.3	%		21.7	%
Other		1.9	%		1.20	%
Total		100.0	%		100.0	%

The investment policies and strategies for the pension benefit plan funds do not use target allocations for the individual asset categories. The investment objectives are to maximize returns subject to specific risk management policies. The Company diversifies its allocation of plan assets by investing in both domestic and international fixed income securities and domestic and international equity securities. These investments are readily marketable and can be sold to fund benefit payment obligations as they become payable..

Cash flows - Contributions expected to be paid

The table below shows the Company's expected annual pension plan contributions under defined benefit plans for the years 2013-2022. The expected payments are based on the assumptions used to measure the Company's obligations at December 31, 2012 and include estimated future employee services.

(In US$ millions)	December 31 2012
2013		28
2014		27
2015		29
2016		30
2017		32
2018-2022		183
Total payments expected during the next 10 years		329

Note 30 – Related party transactions

The Company transacts business with the following related parties, being companies in which our principal shareholders Hemen Holding Ltd and Farahead Investments Inc (hereafter jointly referred to as "Hemen") and companies associated with Hemen have a significant interest:

— Ship Finance International Limited ("Ship Finance")

— Asia Offshore Drilling Limited ("AOD")

— Metrogas Holdings Inc ("Metrogas")

— Frontline Management (Bermuda) Limited ("Frontline")

— Archer Limited ("Archer")

The Company has entered into sale and lease back contracts for several drilling units with Ship Finance, a company in which our principal shareholders Hemen and companies associated with Hemen have a significant interest. Hemen is controlled by trusts established by the Company's President and Chairman Mr. John Fredriksen for the benefit of his immediate family. The Company has determined that the Ship Finance subsidiaries, which own the units, are variable interest entities (VIEs), and that the Company is the primary beneficiary of the risks and rewards connected with the ownership of the units and the charter contracts.

F-44

Accordingly, these VIEs are fully consolidated in the Company's consolidated accounts. The equity attributable to Ship Finance in the VIEs is included in non-controlling interests in the Company's consolidated accounts (See also note 33).

In the 12 months ended December 31, 2012, the Company incurred the following lease costs on units leased back from Ship Finance subsidiaries.

(US$ millions)	2012		2011
West Prospero	-			7
West Polaris		114		126
West Hercules		75		120
West Taurus		114		112
Total		303		365

These lease costs are eliminated on consolidation.

On July 1, 2010 our fully consolidated VIEs, SFL Deepwater Ltd and SFL Polaris Ltd, paid a dividend of $290 million and $145 million respectively to Ship Finance. Ship Finance simultaneously granted loans to SFL Deepwater Ltd and SFL Polaris Ltd for the same amounts. The loans bear interest at 4.5% per annum and comprise the balance of $435 million, reported as long-term debt due to related parties in our balance sheet as of December 31, 2012.

On June 24, 2011, we entered into a share sale and purchase agreement with Ship Finance, where we acquired all the shares of Rig Finance II Limited, which was the owner of West Prospero. The acquisition price for the shares amounted to $47 million. This transaction is accounted for as an equity transaction and no gain or loss is recognized.

In July 2011, we participated in a private placement in Asian Offshore Drilling (AOD) and were allocated shares for $54 million, which corresponds to a 33.75% ownership stake. AOD was established by Mermaid Maritime Public Company Limited in late 2010 when two MOD-V B Class jack-up rigs where ordered at Keppel FELS in Singapore. AOD had additional option agreements for construction of two similar units. Furthermore, it was agreed that we would be responsible for the construction supervision, project management and commercial management of all of AODs jack-up rigs. During the year of 2012 the Company has acquired additional shares in AOD and the Company's holding of AOD as of December 31, 2012 was 26,463,050, representing 66.16% of all of the issued shares in AOD. This investment is accounted for as an equity method investment (See also note 16).

On March 31, 2012, we obtained a short-term unsecured credit facility of $84 million from Metrogas. The principal plus interest was repaid in June 2012.

On May 15, 2012 we obtained a short term unsecured credit facility of US$50 million from Metrogas. The principal plus interest was repaid in July 2012.

On June 7, 2012 we obtained a long term unsecured credit facility of NOK1,200 million from Metrogas. This loan agreement was amended on June 14 and June 27 increasing the loan amount to a total of NOK2,100 (US$352 million). The principal plus interest was repaid in September 2012.

On June 27, 2012, we granted Archer a long term unsecured credit facility of US$20 million. The principal plus interest was repaid in July 2012.

On November 12, 2012, we granted Archer a short term unsecured loan of US$55 million. The loan bears interest of LIBOR + a margin and matured in February 2013.

On December 20, 2012, we sold it's holding in North Atlantic Drilling Ltd unsecured bond of  US$500 million to Metrogas plus accrued interest of US$9 million with a call option to repurchase the bond in full for a price equal to par plus unpaid accrued interest on the date of repurchase. The call option matures in June 2013. The obligation is recorded as a long term related party liability. In conjunction with this arrangement we also entered into a agreement to settle dividend payable to Metrogas in return for a short term unsecured loan of US$93 million. The bond bear a coupon of 7.75% per annum payable semi-annually in arrears. The net proceeds from these arrangements were US$415 million.

F-45

On December 21, 2012, we obtained a short term loan of US$93 million from Metrogas. The loan bears interest of LIBOR + a margin and matures in March 2013 and is reported as short term debt to related parties in our balance sheet as of December 31, 2012.

On December 31, 2012, we obtained a short term loan from Metrogas of NOK140 million. The loan bears interest of NIBOR + a margin and matures in March 2013 and is reported as short term debt to related parties in our balance sheet as of December 31, 2012.

Frontline provides management support and administrative services for the Company, and charged the Company fees of $2 million, $2 million and $1 million for these services in the years 2012, 2011 and 2010, respectively. These amounts are included in "General and administrative expenses".

Note 31 – Risk management and financial instruments

The majority of our gross earnings from rigs and vessels are receivable in U.S. dollars and the majority of our other transactions, assets and liabilities are denominated in U.S. dollars, the functional currency of the Company. However, the Company has operations and assets in a number of countries worldwide and incurs expenditures in other currencies, causing its results from operations to be affected by fluctuations in currency exchange rates, primarily relative to the U.S. dollar. The Company is also exposed to changes in interest rates on floating interest rate debt, and to the impact of changes in currency exchange rates on NOK denominated debt. There is thus a risk that currency and interest rate fluctuations will have a negative effect on the value of the Company's cash flows.

Interest rate risk management

The Company's exposure to interest rate risk relates mainly to its floating interest rate debt and balances of surplus funds placed with financial institutions. This exposure is managed through the use of interest rate swaps and other derivative arrangements. The Company's objective is to obtain the most favorable interest rate borrowings available without increasing its foreign currency exposure. Surplus funds are generally placed in fixed deposits with reputable financial institutions, yielding higher returns than are available on overnight deposits in banks. Such deposits generally have short-term maturities, in order to provide the Company with flexibility to meet all requirements for working capital and capital investments. The extent to which the Company utilizes interest rate swaps and other derivatives to manage its interest rate risk is determined by the net debt exposure and its views on future interest rates.

Interest rate swap agreements not qualified as hedge accounting

At December 31, 2012, the Company had interest rate swap agreements with an outstanding principal of $6,148 million (2011: $4,738 million). In addition, the Company had outstanding cross currency interest rate swaps at December 31, 2012 with a principal amount of $216 million (2011: $34 million). These agreements do not qualify for hedge accounting, and accordingly any changes in the fair values of the swap agreements are included in the consolidated statement of operations under "Gain/(loss) on derivative financial instruments". The combined total fair value of the interest rate swaps and cross currency interest swaps outstanding December 31, 2012 amounted to a liability of $376 million (2011: a liability of $345 million).The fair value of the interest rate swaps are classified as other current liabilities and the cross currency interest swaps are classified as other current assets in our balance sheet as of December 31, 2012.

F-46

The Company's interest rate swap and cross currency interest rate swap agreements as at December 31, 2012, were as follows:

Outstanding principal		Receive rate	Pay rate			Length of contract
(In US$ millions)
	50	3 month LIBOR		4.63	%	May 2005 - May 2015
	300	3 month LIBOR		3.16	%	Dec 2008 - Dec 2018
	150	3 month LIBOR		3.34	%	June 2013 - June 2018
	150	3 month LIBOR		3.30	%	June 2013 - June 2018
	200	3 month LIBOR		2.83	%	Jan 2011 - Jan 2018
	200	3 month LIBOR		3.27	%	Mar 2013 - Mar 2018
	350	3 month LIBOR		3.80	%	Sep 2011 - Sep 2017
	300	3 month LIBOR		3.54	%	Sep 2011 - Jun 2017
	71	6 month LIBOR		3.83	%	Mar 2008 - Sep 2016
	350	3 month LIBOR		3.36	%	Sep 2011 - Jun 2016
	100	3 month LIBOR		2.22	%	Jan 2011 - Jan 2016
	100	3 month LIBOR		2.24	%	Jan 2011 - Jan 2016
	200	3 month LIBOR		2.17	%	Jan 2011 - Jan 2016
	200	3 month LIBOR		2.17	%	Jan 2011 - Jan 2016
	250	3 month LIBOR		2.71	%	May 2009 - May 2014
	250	3 month LIBOR		2.62	%	May 2009 - May 2014
	500	3 month LIBOR		2.06	%	Mar 2009 - Mar 2014
	100	3 month LIBOR		2.17	%	Aug 2012 - Aug 2017
	100	3 month LIBOR		2.17	%	Aug 2012 - Aug 2017
	200	3 month LIBOR		2.57	%	June 2012 - June 2017
	100	3 month LIBOR		2.56	%	June 2012 - June 2017
	100	3 month LIBOR		2.74	%	May 2012 - May 2017
	200	3 month LIBOR		2.14	%	May 2011 - Jan 2016
	200	3 month LIBOR		2.14	%	May 2011 - Jan 2016
	100	3 month LIBOR		1.15	%	Dec 2012 – Dec 2019
	289	3 month LIBOR		1.11	%	Oct 2012 – Dec 2019
	289	3 month LIBOR		1.38	%	Oct 2012 – Dec 2022
	100	3 month LIBOR		1.36	%	Oct 2012 – Oct 2019
	250	3 month LIBOR		0.74	%	Nov 2012 – Nov 2017
	200	3 month LIBOR		1.36	%	Oct 2012 – Oct 2019
	200	3 month LIBOR		1.18	%	Dec 2012 – Dec 2019

The counterparties to the above agreements are DnBNOR Bank ASA, Swedbank AB, Danske Bank, and ING Bank N.V. Credit risk exists to the extent that the counterparties are unable to perform under the contracts, but this risk is considered remote as the counterparties are banks which have all provided loan finance to us and the interest rate swaps are related to those financing arrangements.

Interest rate hedge accounting

Two of the Ship Finance subsidiaries consolidated by the Company as VIE's have entered into interest rate swaps in order to mitigate the Company's exposure to variability in cash flows for future interest payments on the loans taken out to finance the acquisition of West Polaris and West Taurus.  These interest rate swaps qualify for hedge accounting and any changes in their fair value are included in "Other comprehensive income/loss". Below is a summary of the notional amounts, fixed interest rates payable and durations of these interest rate swaps.

Outstanding principal	Receive rate	Pay rate			Length of contract
(In US$ millions)
470 (West Polaris )	1 month LIBOR		3.89	%	July 2008 - Oct 2012
518 (West Taurus)	1 month LIBOR		2.19	%	Dec 2008 - Aug 2013

F-47

In the year ended December 31, 2012 the above two VIE Ship Finance subsidiaries recorded fair value gains of $20 million on their interest rate swaps. These gains were recorded by those VIEs as "Other comprehensive income" but due to their ownership by Ship Finance these gains are allocated to "Non-controlling interest" in our equity statement.

Any change in fair value resulting from hedge ineffectiveness is recognized immediately in earnings. The two VIEsand therefore the Company, did not recognize any gain or loss due to hedge ineffectiveness in the consolidated financial statements during the years ended December 31, 2012, 2011 and 2010 relating to derivative financial instruments.

Foreign currency risk management

The Company uses foreign currency forward contracts and other derivatives to manage its exposure to foreign currency risk on certain assets, liabilities and future anticipated transactions. Such derivative contracts do not qualify for hedge accounting treatment and are recorded in the balance sheet under receivables if the contracts have a net positive fair value, and under other short-term liabilities if the contracts have a net negative fair value. At December 31, 2012, the Company had forward contracts and cross currency interest rate swaps to sell approximately $528 million between January 2013 and May 2013 at exchange rates ranging from NOK5.63 to NOK5.77 per US dollar. The total fair value of currency forward contracts December 31, 2012 amounted to $4 million (December 31, 2011: minus $3 million).

Total Return Swap Agreements

In February 2010, a TRS agreement with 4,500,000 shares in Seadrill as underlying security was settled and the Company simultaneously entered a new TRS agreement for 3,500,000 of common shares in Seadrill with an agreed reference price of NOK125.70 per share and an expiration date in February 2011. In September 2010, the Company partly settled the TRS agreement and reduced the number of underlying Seadrill Limited shares by 750,000 shares from 3,500,000 shares to 2,750,000 common shares.

In January 2011, the Company partly settled the TRS agreement and further reduced the number of underlying Seadrill Limited shares by 750,000 shares from 2,750,000 to 2,000,000 common shares.

In September 2011, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in March 2012 and the agreed reference price was NOK177.21 per share.

In March 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in September and the agreed reference price was NOK 224.70 per share.

In September 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in December and the agreed reference price was NOK 242.80 per share.

In December, 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expires in March 2013 and the agreed reference price was NOK 220.32 per share.

The total realized and unrealized gain relating to TRS agreements in 2012 amounted to $7 million (2011: $5 million, 2010: $27 million).

Credit risk

The Company has financial assets, including cash and cash equivalents, marketable securities, other receivables and certain amounts receivable on derivative instruments, mainly forward exchange contracts and interest rate swaps. These assets expose the Company to credit risk arising from possible default by the counterparty. The Company considers the counterparties to be creditworthy financial institutions and does not expect any significant loss to result from non-performance by such counterparties. The Company, in the normal course of business, does not demand collateral. The credit exposure of interest rate swap agreements, currency option contracts and foreign currency contracts is represented by the fair value of contracts with a positive fair value at the end of each period, reduced by the effects of master netting agreements. It is the Company's policy to enter into master netting agreements with the counterparties to derivative financial instrument contracts, which give the Company the legal right to discharge all or a portion of amounts owed to a counterparty by offsetting them against amounts that the counterparty owes to the Company.

F-48

Fair values

The carrying value and estimated fair value of the Company's financial instruments at December 31, 2012 and December 31, 2011 are as follows:

	December 31, 2012				December 31, 2011
(In US$ millions)	Fair value		Carrying value		Fair value		Carrying value
Cash and cash equivalents		318		318		483		483
Restricted cash		402		402		482		482
Current portion of long-term debt		2,066		2,066		1,419		1,419
Long-term portion of floating rate debt		6,287		6,287		7,711		7,711
Long term portion of fixed rate CIRR loans		218		218		250		250
Fixed interest loans		70		69		77		74
Fixed interest convertible bonds		872		561		735		545
Fixed interest bonds		1,360		1,342		333		350
Floating interest bonds		224		224		75		75

The carrying value of cash and cash equivalents and restricted cash, which are highly liquid, is a reasonable estimate of fair value and categorized at level 1 on the fair value measurement hierarchy.

The fair value of the current and long-term portion of floating rate debt is estimated to be equal to the carrying value since it bears variable interest rates, which are reset regularly and usually in the range between every 1 to 6 months. This debt is not freely tradable and cannot be purchased by the Company at prices other than the outstanding balance plus accrued interest. We have categorized this at level 2 on the fair value measurement hierarchy.

The fair value of the long-term portion of the fixed rate CIRR loans is equal to the carrying value, as they are matched with equal balances of restricted cash. We have categorized this at level 2 on the fair value measurement hierarchy.

The convertible bonds are freely tradable and their fair value has been set equal to the price at which they were traded at on December 31, 2012 and 2011. We have categorized this at level 1 on the fair value measurement hierarchy.

The fixed interest rate bonds are freely tradable and their fair value has been set equal to the price at which they were traded at on December 31, 2012 and December 31, 2011. We have categorized this at level 1 on the fair value measurement hierarchy.

F-49

Financial instruments that are measured at fair value on a recurring basis:

	Fair value		Fair value measurements at reporting date using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In US$ millions)	December 31, 2012		(Level 1)		(Level 2)		(Level 3)
Assets:
Marketable securities		333		329	-			4
Other derivative instruments – short term receivable		11		-		11		-
Total assets		344		329		11		4
Liabilities:
Interest rate swap contracts – short term payable		388		-		388		-
Other derivative instruments – short term payable		8		-		8		-
Total liabilities		396		-		396		-

	Fair value		Fair value measurements at reporting date using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In US$ millions)	December 31, 2011		(Level 1)		(Level 2)		(Level 3)
Assets:
Marketable securities		24		4	-			20
Other derivative instruments – short term receivable		3		1		2		-
TRS equity swap contracts		11		-		11		-
Total assets		38		5		13		20
Liabilities:
Interest rate swap contracts – short term payable		372		-		372		-
Currency forward contracts – short term payable		3		-		3		-
Other derivative instruments – short term payable		39		-		39		-
Total liabilities		414		-		414		-

Roll forward of fair value measurements using unobservable inputs (Level 3):

(In US$ millions)
Beginning balance January 1, 2012	20
Realization	(16	)
Purchase	-
Changes in fair value of bonds	-
Closing balance December 31, 2012	4

ASC 820 Fair Value Measurement and Disclosures emphasizes that fair value is a market-based measurement, not an entity-specific measurement, and should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within levels one and two of the hierarchy) and the reporting entity's own assumptions about market participant assumptions (unobservable inputs classified within level three of the hierarchy).

F-50

Level one input utilizes unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Level two inputs are inputs other than quoted prices included in level one that are observable for the asset or liability, either directly or indirectly. Level two inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability, other than quoted prices, such as interest rates, foreign exchange rates and yield curves that are observable at commonly quoted intervals. Level three inputs are unobservable inputs for the asset or liability, which are typically based on an entity's own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

Quoted market prices are used to estimate the fair value of marketable securities, which are valued at fair value on a recurring basis.

The fair value of total return equity swaps is calculated using the closing prices of the underlying listed shares, dividends paid since inception and the interest rate charged by the counterparty.

The fair values of interest rate swaps and forward exchange contracts are calculated using well-established independent valuation techniques applied to contracted cash flows and LIBOR and NIBOR interest rates as of December 31, 2012.

The fair value of other derivative instruments is calculated using the closing prices of the underlying securities, dividends paid since inception and the interest charged by the counterparty.

Retained Risk

a) Physical Damage Insurance

The Company retains the risk, through self-insurance, for the deductibles relating to physical damage insurance on the Company's rig fleet, currently a maximum of $5 million per occurrence.

b) Loss of Hire Insurance

The Company purchases insurance to cover the Deepwater rigs, 3 semi tenders and the North Atlantic fleet for loss of revenue in the event of extensive downtime caused by physical damage, where such damage is covered under the Company's physical damage insurance. The Company's self-insured retentions under the loss of hire insurance are up to 60 days after the occurrence of the physical damage. Thereafter, under the terms of the insurance, the Company is compensated for loss of revenue for a period ranging from 210 days up to 290 days. The Company retains the risk that the repair of physical damage takes longer than the total number of days in the loss of hire policy.

Concentration of risk

The Company has financial assets, including cash and cash equivalents, marketable securities, other receivables and certain derivative instrument receivable amounts. These other assets expose the Company to credit risk arising from possible default by the counterparty. There is also a concentration of credit risk with respect to cash and cash equivalents to the extent that most of the amounts are carried with DnB NOR Bank ASA, Nordea Bank Finland Plc, Fokus Bank, and ING Bank N.V. The Company considers these risks to be remote.

In the year ended December, 31, 2012, 15% of the Company's contract revenues were received from Petroleo Brasileiro S.A ("Petrobras") (2011: 17%), 14% from Total S.A Group ("Total") (2011: 15%), 11% from Exxon Mobil Corp ("Exxon") (2011: 10%), 10% from Royal Dutch Shell Group ("Shell") (2011: 10%) and 9% from Statoil ASA ("Statoil": 7%).

F-51

Note 32 – Commitments and contingencies

Legal Proceedings:

The Company is a party, as plaintiff or defendant, to several lawsuits in various jurisdictions for demurrage, damages, off-hire and other claims and commercial disputes arising from the operation of its drilling units, in the ordinary course of business or in connection with its acquisition activities.  The Company believes that the resolution of such claims will not have a material adverse effect on the Company's operations or financial condition either individually or in the aggregate. The Company's best estimate of the outcome of the various disputes has been reflected in the financial statements of the Company as of December 31, 2012.

Pledged assets

The book value of assets pledged under mortgages and overdraft facilities at December 31, 2012 was $12,886 million (2011: $12,567 million).

Purchase Commitments

At December 31, 2012, the Company had contractual commitments under nineteen newbuilding contracts totaling $5,604 million (2011: $3,012 million). The contracts commitments are mainly yard installments and are for the construction of two semi-submersible rigs, five jack-up rigs, seven drillships and five tender rigs.

The maturity schedule for the contractual commitments as of December 31, 2012 is as follows:

(In US$ millions)	2013		2014		2015		2016		2017		2018 and thereafter
Newbuildings		2,711		1,834		1,059		-		-		-
Total		2,711		1,834		1,059		-		-		-

Guarantees

The Company has issued guarantees in favor of third parties as follows, which is the maximum potential future payment for each type of guarantee:

(In US$ millions)	December 31, 2012		December 31, 2011
Guarantees to customers of the Company's own performance		2,455		1,553
Guarantee in favor of banks		905		764
Guarantee in favor of suppliers		5,522		2,023
Guarantee in favor of Variable Interest Entities		1,655		1,949
Total		10,536		6,289

Note 33 – Variable Interest Entities (VIEs)

As of December 31, 2012, the Company leased a drillship and two semi-submersible rigs from VIEs under finance leases. Each of the units had been sold by the Company to single purpose subsidiaries of Ship Finance Ltd and simultaneously leased back by the Company on bareboat charter contracts for a term of 15 years. The Company has several options to repurchase the units during the charter periods, and obligations to purchase the assets at the end of the 15 year lease period. The following table gives a summary of the sale and leaseback arrangements, as of December 31, 2012:

Unit	Effective from	Sale value (In US$ millions)		First repurchase option (In US$ millions)		Month of first repurchase option	Last repurchase option * (In US$ millions)		Month of last repurchase Option *
West Polaris	Jul 2008		850		548	September 2012		178	Jun 2023
West Taurus	Nov 2008		850		418	February 2015		149	Nov 2023
West Hercules	Oct  2008		850		580	August 2011		135	Aug 2023

F-52

* For the unit West Polaris, Ship Finance has a put option exercisable at the end of the lease terms by which the vessel may be sold to Seadrill for a fixed price of $75 million. For West Taurus and West Hercules repurchase obligations at the end of the lease terms have been agreed, at $149 million and $135 million, respectively.

The Company has determined that the Ship Finance subsidiaries, which own the units, are variable interest entities (VIEs), and that the Company is the primary beneficiary of the risks and rewards connected with the ownership of the units and the charter contracts. Accordingly, these VIEs are fully consolidated in the Company's consolidated accounts. The Company did not record any gains from the sale of the units, as they continued to be reported as assets at their original cost in the Company's balance sheet at the time of each transaction. The equity attributable to Ship Finance in the VIEs is included in non-controlling interests in the Company's consolidated accounts. At December 31, 2012 the units are reported under drilling units in the Company's balance sheet.

The bareboat charter rates are set on the basis of a Base LIBOR Interest Rate for each bareboat charter contract, and thereafter are adjusted for differences between the LIBOR fixing each month and the Base LIBOR Interest Rate for each contract. A summary of the bareboat charter rates per day for each unit is given below. The amounts shown are based on the Base LIBOR Interest Rate, and reflect average rates for the year.

				2013		2014		2015		2016		2017
	Base LIBOR Interest Rate			(In US$  thousands)		(In US$ thousands)		(In US$ thousands)		(In US$ thousands)		(In US$ thousands)
West Polaris		2.85	%		223.3		176.5		175.4		170.0		170.0
West Taurus		4.25	%		316.2*		320.7		165.0		158.8		157.5
West Hercules		4.25	%		250.0		238.5		180.0		172.5		170.0

* For a period the interest rates West Taurus have been fixed at 2.17% regardless of movements in LIBOR interest rates. The fixed charter rate is reflected in the above table.

The assets and liabilities in the statutory accounts of the VIEs as at December 31, 2012 and as at December 31, 2011 are as follows:

(In US$ millions)	December 31, 2012				December 31, 2011
	SFL		SFL		SFL		SFL
	West		Deepwater		West		Deepwater
	Polaris		Ltd.		Polaris		Ltd.
	Limited				Limited
Name of unit	West		West		West		West
	Polaris		Taurus		Polaris		Taurus
			and West				and West
			Hercules				Hercules
Investment in finance lease		534		1,120		611		1,240
Other assets		7		20		12		23
Total assets		541		1,140		623		1,263
Long term debt		360		-		398		822
Other liabilities		107		989		174		326
Total liabilities		467		989		572		1,148
Equity		74		151		51		115
Book value of units in the Company's consolidated accounts		594		1,035		614		1,021

F-53

Note 34 – Gain on realization of marketable securities

On May 17, 2012, SapuraCrest (BURSA: SCRES) and Kencana (BURSA: KEPB) jointly announced that they have entered into a merger agreement forming a new company, SapuraKencana Petroleum BHD (SapuraKencana). Consequently Seadrill received 589 million shares in the new company and a cash payment of $65 million.

This merger resulted in a dilution of our equity share from 23.59% to 11.79% and a recognized gain on decline in ownership of $169 million represented on a separate line item in our statement of operations.

On May 30, 2012, Seadrill announced the sale of 300 million shares in SapuraKencana resulting in a gain of $84 million reported as gain on realization of marketable securities in our statement of operation. Seadrill's holding of shares in SapuraKencana following this transaction represents 6.4% ownership of the outstanding shares. The net proceed from the sale of these shares was $198 million.

On February 7, 2011, Ensco plc ("Ensco") (NYSE: ESV) and Pride International, Inc. ("Pride") (NYSE: PDE) jointly announced that they have entered into a definitive merger agreement under which Ensco will combine with Pride in a cash and stock transaction. On May 31, 2011, Ensco announced the completion of its acquisition of Pride International, after both companies received shareholder approvals. Under the terms of the merger agreement, Pride stockholders received 0.4778 newly-issued shares of Ensco plus $15.60 in cash for each share of Pride common stock.

The merger represents a realization of our previously held Pride positions. The accumulated other-comprehensive income effect related to our holding in Pride amounted to $416 million as of May 31, 2011.  This amount has been released into the profit and loss statement upon our acceptance of the Ensco offer, and the gain is presented on a separate line item in our financial statements. The cash effect of this transaction was $141 million in 2011.

Note 35 – Subsequent Events

On November 15, 2012 – a subsidiary of Seadrill Ltd entered into an agreement with Songa Eclipse Ltd to acquire the ultra-deepwater semi-submersible drilling rig, "Songa Eclipse" for cash consideration of US$590 million.  The cash consideration also includes the acquisition of the drilling contract with Total Offshore Angola that is fixed and ending in December 2013 with three one year options to extend the contract.  This acquisition is in line with our strategy of building a modern fleet through selective acquisitions and organic growth giving us an increased exposure to the ultra-deepwater market.  A prepayment of $59 million was made before the end of 2012 and the physical delivery and final payment took place January 3, 2013 which is considered to be the acquisition date. This purchase is considered to constitute a business combination for accounting purposes.  The Company is still in the process of determining the allocation of the purchase price to the identified assets and liabilities acquired, due to the acquisition being recently completed.

On January 16, 2013 – Tullow plc has exercised its contractual option to extend the contract for the ultra-deepwater semi-submersible rig West Leo by two years from May 2016 to May 2018. The West Leo is expected to carry out operations in West Africa until the end of its contract in May 2018. The potential contract revenue for the extension is estimated to approximately US$450 million based on 97 percent utilization and includes a performance bonus arrangement. This brings the total estimated contract value to US$1.13 billion. In line with the omnibus agreement terms and conditions between Seadrill and Seadrill Partners, Seadrill is obligated to offer the West Leo to Seadrill Partners at a fair market price.

On January 30, 2013 – the Company received and accepted an attractive offer from a commercial bank to finance its current exposure to Sevan Drilling ASA ("Sevan") through a forward agreement. The Company sold in connection with this its existing 96,000,000 shares and received a forward agreement with exposure to the same number of shares. The shares have been sold at NOK 3.95 per share. The forward agreement runs until 30 April 2013 and has a strike price of NOK 3.9851. Following the new agreement Seadrill are not longer directly owners of any shares in Sevan, but are exposed though forward agreements to 96,000,000 shares or 28,52 percent of the outstanding shares. The total ownership percentage has been calculated based on an issued share capital in Sevan of 336,625,000 shares and do not include the issuance of the new planned private placement.

On January 31, 2013 – the Company entered into an agreement for the construction of two high specification jack-up drilling rigs with Dalian Shipbuilding Industry Offshore Inc in China. The new units are scheduled for delivery during the first and second quarter 2015, and the estimated total project price is approximately US$230 million (including project management, capitalized interest, drilling and handling tools, spares and operation preparations) per rig, with tail-heavy payment terms.

F-54

On February 6, 2013 – our subsidiary Seadrill Janus Ltd. completed the sale of the jack-up drilling unit West Janus for a total consideration of $73 million.

On February 7, 2013 - the Company participated in a private placement in Sevan Drilling ASA, and was allocated 81,828,500 shares at a subscription price of NOK 3.95. Subsequently, Seadrill received and accepted an offer from a commercial bank to finance these shares. In connection to this, Seadrill has transferred its entire allocation to the same commercial bank and entered into a forward agreement to buy the same number of shares. The forward agreement runs until May 6, 2013 and has a strike price of NOK 3.9815 per share.  Following this transaction, Seadrill will not directly hold any shares in Sevan, but will be exposed through forward agreements to 177,828,500 shares or 29.9 percent of the outstanding shares following completion of the private placement.

On February 11, 2013 – the Company and SapuraKencana Petroleum Berhad ("SapuraKencana") entered into a conditional sale and purchase agreement in relation to the proposed transaction. SapuraKencana will acquire all the tender rigs in Seadrill's fleet except for the West Vencedor, T15, and T16. These three rigs are either owned or planned to be owned by Seadrill Partners LLC. Seadrill will in a transition period in co-operation with SapuraKencana retain the management of all tender rigs that are in operation outside Asia. The agreed acquisition price is for an enterprise value of US$2.9 billion less adjustments and includes future capital commitments for newbuildings T17, T18, and West Esperanza. The Company will furthermore continue to manage and supervise the construction of the current new building program on behalf of SapuraKencana. The enterprise value includes all the debt in the tender rig business which is estimated at US$780 million as of February 6, 2013. Seadrill has agreed to pay US$75 million to SapuraKencana at closing to compensate for cash flow from the tender rig business from February 8, 2013 to closing, netted off for lost interest income. The transaction closed on April 30, 2013.

On February 11, 2013 – the Company participated in a private placement of 82,003,000 shares in Archer Limited. The shares were acquired at price US$1.20 per share. As part of the private placement the short term unsecured loan of US$55 million granted to Archer in November was converted to shares.  Furthermore, Seadrill will receive 2,811,793 shares in Archer as compensation for underwriting parts of the private placement. Following this purchase and the receipt of the underwriting commission, Seadrill will be the owner of 231,053,239 shares in the Archer Limited, corresponding to 39.9% of the total number of outstanding shares in the Archer Limited.

On March 5, 2013 – the Company exercised fixed price options for the construction of two high specification jack-up drilling rigs at Dalian Shipbuilding Industry Offshore Co., Ltd. (DSIC Offshore) in China. The estimated total project price is approximately US$230 million.

On March 5, 2013– the Company successfully completed a NOK 1,800 million ($316 million) senior unsecured bond issue with maturity in 2018. An application will be made for the bonds to be listed on Oslo Børs. The net proceeds from the bond issue will be used for general corporate purposes, including payments under recently announced newbuilding contracts.

On March 12, 2013 – the Company participated in a private placement in Asia Offshore Drilling Limited (AOD). AOD raised a total of US$100 million in the private placement. Seadrill Limited and Mermaid Maritime Plc, the majority shareholders in the Company, subscribed pro-rata to the entire share capital issue. Seadrill Limited and Mermaid Maritime Plc, will own 66.18 percent and 33.76 percent of the Company respectively post the transaction. AOD I was delivered January 31, 2013, and AOD II was delivered April 15, 2013. As of April 22, 2013, AOD has one jack-up under con struction at the Keppel FELS shipyard in Singapore.

On March 19, 2013 – the Company signed a new $1,450 million facility with various commerical lending institutions and export credit agencies, to fund the aquisition of the West Auriga and the West Vela, which have been pledged as security. The facility bears interest at LIBOR plus a margin in the range of 2.7% to 3.0%, with maturity date in 2025. As at April 30, 2013, this facility has not yet been drawn down.

On March 25, 2013 – the Company and the other major shareholder in AOD, Mermaid Maritime Plc, signed a shareholder resolution that changed the board composition in favor of the Company. Based on this change we now control the Board and therefore also the company considering the fact that we as of March 25th owned 66.18% of the shares in AOD. March 25th is considered the acquisition date and we have concluded that we will consolidate the financial results and balance sheet of AOD from this date. The acquisition is considered to constitute a business combination achieved in stages for accounting purposes. The Company is still in the process of determining the accounting consequences due to the acquisition being recently completed.

F-55

SIGNATURES

The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this Annual Report on its behalf.

Seadrill Limited

(Registrant)

Date: April 30, 2013

By:	/s/ Fredrik Halvorsen
Name:	Fredrik Halvorsen
Title:	Chief Executive Officer of Seadrill Management AS (Principal Executive Officer of Seadrill Limited)

F-56

EX-8.1

Exhibit 8.1

Significant subsidiaries

Name of company	Country of Incorporation	Principal activities	Percent owned
Drilling unit owning companies
North Atlantic Alpha Ltd	Bermuda	Owner of West Alpha	73
North Atlantic Elara Ltd	Bermuda	Owner of Wesy Elara	73
North Atlantic Epsilon Ltd	Bermuda	Owner of West Epsilon	73
North Atlantic Linus Ltd	Bermuda	Owner of West Linus	73
North Atlantic Navigator Ltd	Bermuda	Owner of West Navigator	73
North Atlantic Pheonix Ltd	Bermuda	Owner of West Pheonix	73
North Atlantic Venture Ltd	Bermuda	Owner of West Venture	73
Scorpion Courageous Ltd.	Bermuda	Owner of Offshore Courageous	100
Scorpion Defender Ltd.	Bermuda	Owner of Offshore Defender	100
Scorpion Freedom Ltd.	Bermuda	Owner of Offshore Freedom	100
Scorpion Intrepid Ltd.	Bermuda	Owner of Offshore Intrepid	100
Scorpion Resolute Ltd.	Bermuda	Owner of Offshore Resolute	100
Scorpion Rigs Ltd.	Bermuda	Owner of Offshore Mischief	100
Scorpion Vigilant Ltd.	Bermuda	Owner of Offshore Vigilant	100
Seabras Rig Holdco Kft.	Hungary	Owner of West Capricorn	100
Seadrill Alliance Ltd.	Bermuda	Owner of West Alliance	100
Seadrill Ariel Ltd.	Liberia	Owner of West Ariel	100
Seadrill Auriga Ltd.	Bermuda	Owner of West Auriga	100
Seadrill Carina Ltd	Bermuda	Owner of West Carina	100
Seadrill Castor Ltd.	Bermuda	Owner of West Castor	100
Seadrill China Operations Ltd.	Bermuda	Owner of West Aquarius	100
Seadrill Cressida Ltd.	Bermuda	Owner of West Cressida	100
Seadrill Deepwater Drillship Ltd.	Cayman Islands	Owner of West Capella	100
Seadrill Eclipse Ltd	Bermuda	Owner of West Eclipse *	100
Seadrill Eminence Ltd	Bermuda	Owner of West Eminence	100
Seadrill Esperanza Ltd	Bermuda	Owner of West Esperanza	100
Seadrill Gemini Ltd	Bermuda	Owner of West Gemini	100
Seadrill Hungary Kft.	Hungary	Owner of West Sirius	100
Seadrill Indonesia Ltd	Bermuda	Owner of West Callisto and West Leda	100
Seadrill Janus Ltd.	Bermuda	Former owner of West Janus **	100
Seadrill Jaya Ltd.	Bermuda	Owner of West Jaya	100
Seadrill Jupiter Ltd.	Bermuda	Owner of West Jupiter	100
Seadrill Leo Ltd.	Bermuda	Owner of West Leo	100
Seadrill Menang Ltd.	Bermuda	Owner of West Menang	100
Seadrill Neptun Ltd.	Bermuda	Owner of West Neptun	100
Seadrill Oberon Ltd.	Bermuda	Owner of West Oberon	100
Seadrill Orion Ltd.	Bermuda	Owner of West Orion	100
Seadrill Pegasus Pte Ltd.	Singapore	Owner of West Pegasus	100
Seadrill Pelaut Ltd.	Bermuda	Owner of West Pelaut	100
Seadrill Rigel Ltd.	Bermuda	Owner of West Rigel	100
Seadrill Setia Ltd.	Bermuda	Owner of West Setia	100
Seadrill T11 Ltd.	Bermuda	Owner of T11	100
Seadrill T12 Ltd.	Bermuda	Owner of T12	100
Seadrill T15 Ltd.	Bermuda	Owner of T15	100
Seadrill T16 Ltd.	Bermuda	Owner of T16	100
Seadrill T17 Ltd.	Bermuda	Owner of T17	100
Seadrill T18 Ltd.	Bermuda	Owner of T18	100
Seadrill Telesto Ltd.	Bermuda	Owner of West Telesto	100
Seadrill Tellus Ltd.	Bermuda	Owner of West Tellus	100
Seadrill Tender Rig Indonesia Ltd.	Bermuda	Holding company and owner of West Berani	100
Seadrill Tender Rig Ltd.	Bermuda	Holding company and owner of T-4 and T-7	100
Seadrill Triton Ltd.	Bermuda	Owner of West Triton	100
Seadrill Tucana Ltd.	Bermuda	Owner of West Tucana	100
Seadrill Vela Ltd.	Bermuda	Owner of West Vela	100
Seadrill Vencedor Ltd.	Bermuda	Owner of West Vencedor	100

Drilling units under sale leaseback	Bermuda
Rig Finance II Ltd. ***	Bermuda	Owner of West Prospero	0
SFL Deepwater Ltd. ***	Bermuda	Owner of West Hercules and West Taurus	0
SFL Polaris Ltd. ***	Bermuda	Owner of West Polaris	0
Contracting and management companies
North Atlantic Crew AS	Norway	Crewing Company	73
North Atlantic Drilling UK Ltd	United Kingdom	Drilling services contractor	73
North Atlantic Managemnet AS	Norway	Management company	73
North Atlantic Norway Ltd	Bermuda	Drilling services contractor	73
Sea Dragon de Mexico S. de R.L. de C.V.	Mexico	Management company	100
Seadrill Americas Inc.	USA	Drilling services contractor and technical services company	100
Seadrill Asia Ltd.	Hong Kong	Drilling services contractor, holding company	100
Seadrill Deepwater Contracting Ltd.	Bermuda	Contracting company	100
Seadrill Deepwater Crewing Ltd.	Bermuda	Crewing company	100
Seadrill Deepwater Units Pte Ltd.	Singapore	Management company	100
Seadrill Insurance Ltd.	Bermuda	Insurance company	100
Seadrill Management (S) Pte Ltd	Singapore	Management company	100
Seadrill Management AME Ltd.	Bermuda	Management company	100
Seadrill Management AS	Norway	Management company	100
Seadrill Management Ltd.	United Kingdom	Management company	100
Seadrill Management Services Ltd.	British Virgin Islands	Management company	100
Seadrill Offshore AS	Norway	Drilling services contractor	100
Seadrill Offshore Singapore Ltd.	Singapore	Management company	100
Seadrill Servicos de Petroleo Ltda.	Brazil	Drilling services contractor	100
Holding Companies
North Atlantic Drilling Ltd	Bermuda	Holding Company of North Atlantic vessel owning entities	73
Seabras Rig Holdco Ltd.	Bermuda	Holding Company	100
Seadrill Common Holdings Ltd.	Bermuda	Holding Company	100
Seadrill Deepwater Holdings Ltd.	Bermuda	Holding company for deepwater rigs	100
Seadrill Jack Up Holding Ltd	Bermuda	Holding Company of Scorpion vessel owning entities	100
Seadrill Member LLC	Marshall Islands	Holding Company	100
Seadrill UK Ltd	United Kingdom	Holding Company	100

* The acquisition of West Eclipse was completed post year end on January 3, 2013.

** The West Janus was sold after the financial year end on February 6, 2013.

*** Fully consolidated Variable interest entities.

EX-12.1

Exhibit 12.1

CERTIFICATION OF THE PRINCIPAL EXECUTIVE OFFICER

I, Fredrik Halvorsen, certify that:

1. I have reviewed this annual report on Form 20-F of Seadrill Limited;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4. The company's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the company's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the company's internal control over financial reporting that occurred during the period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company's internal control over financial reporting; and

5. The company's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company's auditors and the audit committee of the company's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the company's internal control over financial reporting.

Date:  April 30, 2013

/s/ Fredrik Halvorsen
Fredrik Halvorsen

President and Chief Executive Officer

EX-12.2

Exhibit 12.2

CERTIFICATION OF THE PRINCIPAL FINANCIAL OFFICER

I, Rune Magnus Lundetræ, certify that:

1. I have reviewed this annual report on Form 20-F of Seadrill Limited;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4. The company's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the company's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the company's internal control over financial reporting that occurred during the period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company's internal control over financial reporting; and

5. The company's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company's auditors and the audit committee of the company's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the company's internal control over financial reporting.

Date:  April 30, 2013

/s/ Rune Magnus Lundetræ
Rune Magnus Lundetræ

Senior Vice President and Chief Financial Officer

EX-12.3

Exhibit 12.3

CERTIFICATION OF THE PRINCIPAL FINANCIAL OFFICER

I, Robert Hingley-Wilson, certify that:

1. I have reviewed this annual report on Form 20-F of Seadrill Limited;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4. The company's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the company's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the company's internal control over financial reporting that occurred during the period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company's internal control over financial reporting; and

5. The company's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company's auditors and the audit committee of the company's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the company's internal control over financial reporting.

Date:  April 30, 2013

/s/ Robert Hingley-Wilson
Robert Hingley-Wilson

Senior Vice President and Chief Accounting Officer

EX-13.1

Exhibit 13.1

PRINCIPAL EXECUTIVE OFFICER CERTIFICATION

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Annual Report of Seadrill Limited (the "Company") on Form 20-F for the year ended December 31, 2012 as filed with the Securities and Exchange Commission (the "SEC") on or about the date hereof (the "Report"), I, Fredrik Halvorsen, Principal Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes- Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

A signed original of this written statement has been provided to the Company and will be retained by the Company and furnished to the SEC or its staff upon request.

Date:  April 30, 2013

/s/ Fredrik Halvorsen

Fredrik Halvorsen

President and Chief Executive Officer

EX-13.2

Exhibit 13.2

PRINCIPAL FINANCIAL OFFICER CERTIFICATION

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Annual Report of Seadrill Limited (the "Company") on Form 20-F for the year ended December 31, 2012 as filed with the Securities and Exchange Commission (the "SEC") on or about the date hereof (the "Report"), I, Rune Magnus Lundetræ, Principal Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

A signed original of this written statement has been provided to the Company and will be retained by the Company and furnished to the SEC or its staff upon request.

Date:  April 30, 2013

/s/ Rune Magnus Lundetræ
Rune Magnus Lundetræ

Senior Vice President and Chief Financial Officer

EX-13.3

Exhibit 13.3

PRINCIPAL FINANCIAL OFFICER CERTIFICATION

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Annual Report of Seadrill Limited (the "Company") on Form 20-F for the year ended December 31, 2012 as filed with the Securities and Exchange Commission (the "SEC") on or about the date hereof (the "Report"), I, Robert Hingley-Wilson, Principal Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

A signed original of this written statement has been provided to the Company and will be retained by the Company and furnished to the SEC or its staff upon request.

Date:  April 30, 2013

/s/ Robert Hingley-Wilson
Robert Hingley-Wilson

Senior Vice President and Chief Accounting Officer

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Commitments and contingencies

12 Months Ended

Dec. 31, 2012

Commitments and contingencies [Abstract]

Commitments and contingencies

Note 32 – Commitments and contingencies

Legal Proceedings:

The Company is a party, as plaintiff or defendant, to several lawsuits in various jurisdictions for demurrage, damages, off-hire and other claims and commercial disputes arising from the operation of its drilling units, in the ordinary course of business or in connection with its acquisition activities. The Company believes that the resolution of such claims will not have a material adverse effect on the Company's operations or financial condition either individually or in the aggregate. The Company's best estimate of the outcome of the various disputes has been reflected in the financial statements of the Company as of December 31, 2012.

Pledged assets

The book value of assets pledged under mortgages and overdraft facilities at December 31, 2012 was $12,886 million (2011: $12,567 million).

Purchase Commitments

At December 31, 2012, the Company had contractual commitments under nineteen newbuilding contracts totaling $5,604 million (2011: $3,012 million). The contracts commitments are mainly yard installments and are for the construction of two semi-submersible rigs, five jack-up rigs, seven drillships and five tender rigs.

The maturity schedule for the contractual commitments as of December 31, 2012 is as follows:

(In US$ millions)	2013		2014		2015		2016		2017		2018 and thereafter
Newbuildings		2,711		1,834		1,059		-		-		-
Total		2,711		1,834		1,059		-		-		-

Guarantees

The Company has issued guarantees in favor of third parties as follows, which is the maximum potential future payment for each type of guarantee:

(In US$ millions)	December 31, 2012		December 31, 2011
Guarantees to customers of the Company's own performance		2,455		1,553
Guarantee in favor of banks		905		764
Guarantee in favor of suppliers		5,522		2,023
Guarantee in favor of Variable Interest Entities		1,655		1,949
Total		10,536		6,289

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Marketable securities (Tables)

12 Months Ended

Dec. 31, 2012

Marketable securities [Abstract]

Marketable securities held

Marketable securities held by the Company are equity securities considered to be available-for-sale securities or trading securities.

(In US$ millions)	December 31, 2012		December 31, 2011
Original cost		128		24
Unrealized gain on marketable securities		205		-
Carrying value		333		24

Marketable securities and changes in carrying value

Marketable securities held by us include approximately 81.1% of the partially redeemed Petromena NOK2,000 million bond ("Petromena") and 6.4% of SapuraKencana . Marketable securities and changes in their carrying value are as follows:

(In US$ millions)	Ensco			Petromena		Golden Close			Sapura Kencana			Total
Historic cost at December 31, 2011		5			4		15			-			24
Fair Market value adjustments recognized via OCI		-			-		1			-			1
Fair Market value adjustments recognized via P&L		(1	)		-		-			-			(1	)
Net book value at December 31, 2011		4			4		16			-			24
Additions		-			-		-			237			237
Fair market value adjustments recognized via OCI		-			-		-			84			84
Release of OCI into profit & loss		-			-		(1	)		(84	)		(85	)
Realization of historic cost		(4	)		-		(15	)		(113	)		(132	)
Other than temporary impairments		-			-		-			-			-
Historic cost at Dec 31, 2012		-			4		-			124			128
Fair Market value adjustments recognized via OCI		-			-		-			205			205
Fair Market value adjustments recognized via P&L		-			-		-			-			-
Net book value at December 31, 2012		-			4		-			329			333

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Other revenues (Tables)

12 Months Ended

Dec. 31, 2012

Other revenues [Abstract]

Other revenues

Other revenues comprise the following items:

	Year ended December 31
(In US$ millions)	2012		2011			2010
Amortization of unfavorable contracts		-		24			39
Amortization of favorable contracts		(12)		(23	)		(13	)
Revenues related party		15		0			0
Total		3		1			26

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Related party transactions (Tables)

12 Months Ended

Dec. 31, 2012

Related party transactions [Abstract]

Lease costs on units leased back from related parties

In the 12 months ended December 31, 2012, the Company incurred the following lease costs on units leased back from Ship Finance subsidiaries.

(US$ millions)	2012		2011
West Prospero	-			7
West Polaris		114		126
West Hercules		75		120
West Taurus		114		112
Total		303		365

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Other current assets (Tables)

12 Months Ended

Dec. 31, 2012

Other current assets [Abstract]

Other current assets

Other current assets include:

(In US$ millions)	December 31, 2012		December 31, 2011
Prepaid expenses		89		25
Deferred charges – short term portion		24		26
Accrued revenue		15		-
Unrealized gain on total return swap agreements		7		11
Reimbursable amounts due from customers		49		154
Favorable contracts		2		12
Other		123		95
Total other current assets		309		323

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Earnings per share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income [Abstract]
Net income	$ 1,108	$ 1,401	$ 1,117
Effect of dilution [Abstract]
Convertible bonds	37	45	228
Share options	0	0	0
Net income after effect of dilution	1,145	1,446	1,345	[1]
Weighted average million of shares outstanding [Abstract]
Weighted average million of shares outstanding (in shares)	469	459	409
Effect of dilution [Abstract]
Convertible bonds (in shares)	20	28	60
Share options (in shares)	1	1	2
Weighted average million of shares outstanding after effect of dilution (in shares)	490	488	471	[1]
Earnings per share [Abstract]
Earnings per share (in US dollars per share)	$ 2.37	$ 3.05	$ 2.73
Diluted earnings per share (in US dollars per share)	$ 2.34	$ 2.96	$ 2.73	[1]
Loss on debt extinguishment	$ 0	$ 0	$ (145)

[1] The loss on debt extinguishment of $145 million has been added back to net income in addition to interest expenses related to the convertible bonds. These effects are anti-dilutive, and exceed the effect of increased denominator when calculating the diluted earnings per share. As a consequence of this, the diluted earnings per share equal basic earnings per share.

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Risk management and financial instruments (Details) In Millions, except Share data, unless otherwise specified	12 Months Ended																															12 Months Ended																																				12 Months Ended				12 Months Ended			1 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 Contract Revenues [Member] Customer Concentration Risk [Member] Petrobras [Member]	Dec. 31, 2011 Contract Revenues [Member] Customer Concentration Risk [Member] Petrobras [Member]	Dec. 31, 2012 Contract Revenues [Member] Customer Concentration Risk [Member] Total [Member]	Dec. 31, 2011 Contract Revenues [Member] Customer Concentration Risk [Member] Total [Member]	Dec. 31, 2012 Contract Revenues [Member] Customer Concentration Risk [Member] Exxon [Member]	Dec. 31, 2011 Contract Revenues [Member] Customer Concentration Risk [Member] Exxon [Member]	Dec. 31, 2012 Contract Revenues [Member] Customer Concentration Risk [Member] Shell [Member]	Dec. 31, 2011 Contract Revenues [Member] Customer Concentration Risk [Member] Shell [Member]	Dec. 31, 2012 Contract Revenues [Member] Customer Concentration Risk [Member] Statoil [Member]	Dec. 31, 2011 Contract Revenues [Member] Customer Concentration Risk [Member] Statoil [Member]	Dec. 31, 2012 Uninsured Risk [Member] USD ($) Tender	Dec. 31, 2012 Recurring [Member] USD ($)	Dec. 31, 2011 Recurring [Member] USD ($)	Dec. 31, 2012 Recurring [Member] Level 1 [Member] USD ($)	Dec. 31, 2011 Recurring [Member] Level 1 [Member] USD ($)	Dec. 31, 2012 Recurring [Member] Level 2 [Member] USD ($)	Dec. 31, 2011 Recurring [Member] Level 2 [Member] USD ($)	Dec. 31, 2012 Recurring [Member] Level 3 [Member] USD ($)	Dec. 31, 2011 Recurring [Member] Level 3 [Member] USD ($)	Dec. 31, 2012 Fair value [Member] USD ($)	Dec. 31, 2011 Fair value [Member] USD ($)	Dec. 31, 2012 Carrying value [Member] USD ($)	Dec. 31, 2011 Carrying value [Member] USD ($)	Dec. 31, 2012 Minimum [Member] Uninsured Risk [Member]	Dec. 31, 2012 Maximum [Member] Uninsured Risk [Member]	Dec. 31, 2012 Consolidated Variable Interest Entities [Member] Entity	Dec. 31, 2012 Interest Rate Swap [Member] USD ($)	Dec. 31, 2011 Interest Rate Swap [Member] USD ($)	Dec. 31, 2011 Interest Rate Swap [Member] Consolidated Variable Interest Entities [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 1 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 2 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 3 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 4 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 5 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 6 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 7 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 8 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 9 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 10 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 11 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 12 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 13 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 14 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 15 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 16 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 17 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 18 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 19 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 20 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 21 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 22 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 23 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 24 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 25 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 26 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 27 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 28 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 29 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 30 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 31 [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 32 [Member] Consolidated Variable Interest Entities [Member] USD ($)	Dec. 31, 2012 Interest Rate Swap [Member] Swap 33 [Member] Consolidated Variable Interest Entities [Member] USD ($)	Dec. 31, 2012 Cross Currency Interest Rate Swap [Member] USD ($)	Dec. 31, 2011 Cross Currency Interest Rate Swap [Member] USD ($)	Dec. 31, 2012 Forward Contracts [Member] USD ($)	Dec. 31, 2011 Forward Contracts [Member] USD ($)	Dec. 31, 2012 Forward Contracts [Member] Minimum [Member] NOK	Dec. 31, 2012 Forward Contracts [Member] Maximum [Member] NOK	Dec. 31, 2012 Total Return Swap [Member] USD ($)	Dec. 31, 2011 Total Return Swap [Member] USD ($)	Dec. 31, 2010 Total Return Swap [Member] USD ($)	Feb. 28, 2010 Total Return Swap [Member] Swap 28 [Member] NOK	Feb. 28, 2010 Total Return Swap [Member] Swap 29 [Member]	Feb. 28, 2010 Total Return Swap [Member] Swap 31 [Member]	Sep. 30, 2011 Total Return Swap [Member] Swap 32 [Member] NOK	Jan. 31, 2011 Total Return Swap [Member] Swap 32 [Member]	Mar. 31, 2012 Total Return Swap [Member] Swap 33 [Member] NOK	Sep. 30, 2012 Total Return Swap [Member] Swap 34 [Member] NOK	Dec. 31, 2012 Total Return Swap [Member] Swap 35 [Member] NOK
Derivative [Line Items]
Number of variable interest entities with interest rate swaps																													2
Total fair value of interest rate swaps and cross currency interest rate swaps outstanding	$ 376	$ 345
Outstanding principal																														6,148	4,738		50	300	150	150	200	200	350	300	71	350	100	100	200	200	250	250	500	100	100	200	100	100	200	200	100	289	289	100	250	200	200	470	518	216	34
Name of unit																																																																West Polaris	West Taurus
Receive rate, variable rate basis																																	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	6 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	3 month LIBOR	1 month LIBOR	1 month LIBOR
Pay rate, fixed rate (in hundredths)																																	4.63%	3.16%	3.34%	3.30%	2.83%	3.27%	3.80%	3.54%	3.83%	3.36%	2.22%	2.24%	2.17%	2.17%	2.71%	2.62%	2.06%	2.17%	2.17%	2.57%	2.56%	2.74%	2.14%	2.14%	1.15%	1.11%	1.38%	1.36%	0.74%	1.36%	1.18%	3.89%	2.19%
Length of contract, maturity date																																	May 31, 2015	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2018	Jan. 31, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Jan. 31, 2016	Jan. 31, 2016	Jan. 31, 2016	Jan. 31, 2016	May 31, 2014	May 31, 2014	Mar. 31, 2014	Aug. 30, 2017	Aug. 30, 2017	Jun. 30, 2017	Jun. 30, 2017	May 31, 2017	Jan. 31, 2016	Jan. 31, 2016	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2022	Oct. 31, 2019	Nov. 30, 2017	Oct. 30, 2019	Dec. 31, 2019	Oct. 30, 2012	Aug. 31, 2013
Change in unrealized gain/(loss) on interest rate swaps in VIEs	20	20	(11)																													20
Amount of currency to be sold																																																																				516
Forward exchange rate																																																																						5.63	5.77
(Loss) gain on derivative instrument																																																																				4	(3)			7	5	27
Underlying security (in shares)																																																																											4,500,000	3,500,000	2,750,000	2,000,000	2,000,000	2,000,000	2,000,000	2,000,000
Agreed reference price																																																																											125.70			177.21		224.70	242.80	220.32
Reduction in underlying security (in shares)																																																																											750,000				750,000
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents																							318	483	318	483
Restricted cash																							402	482	402	482
Current portion of long-term debt																							2,066	1,419	2,066	1,419
Long-term portion of floating rate debt																							6,287	7,711	6,287	7,711
Long term portion of fixed rate CIRR loans																							218	250	218	250
Fixed interest loans																							70	77	69	74
Fixed interest convertible bonds																							872	735	561	545
Fixed interest bonds																							1,360	333	1,342	350
Floating interest bonds																							224	75	224	75
Assets [Abstract]
Marketable securities															333	24	329	4	0	0	4	20
TRS equity swap contracts																11		0		11		0
Other derivative instruments - short term receivable															11	3	0	1	11	2	0	0
Total assets															344	38	329	5	11	13	4	20
Liabilities [Abstract]
Interest rate swap contracts - short term payable															388	372	0	0	388	372	0	0
Currency forward contracts - short term payable																3		0		3		0
Other derivative instruments - short term payable															8	39		0	8	39		0
Total liabilities															396	414	0	0	396	414	0	0
Fair value measurements using unobservable inputs [Roll Forward]
Beginning balance	20
Realization	(16)
Purchase	0
Changes in fair value of bonds	0
Closing balance	4	20
Retained Risk [Abstract]
Maximum risk of loss from insurance deductibles per occurrence														$ 5
Number of semi tenders insured														3
Self-insured retention period														60 days
Compensation period																											210 days	290 days
Concentration Risk [Line Items]
Concentration Risk, Percentage (in hundredths)				15.00%	17.00%	14.00%	15.00%	11.00%	10.00%	10.00%	10.00%	9.00%	7.00%

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Taxation (Tables)

12 Months Ended

Dec. 31, 2012

Taxation [Abstract]

Components of income taxes

Income taxes consist of the following:

	Year ended December 31
(In US$ millions)	2012			2011			2010
Current tax expense:
Bermuda		-			-			-
Foreign		167			328			184
Deferred tax expense:
Bermuda		-			-			-
Foreign		58			24			14
Deferred taxes acquired during the year		-			-			-
Tax related to internal sale of assets in subsidiary, amortized for group purposes		7			(163	)		(39	)
Total provision		232			189			159
Effective tax rate		16.1	%		11.3	%		12.1	%

Income tax reconciliation

The income taxes for the years ended December 31 differed from the amount computed by applying the statutory income tax rate of 0 % as follows:

	Year ended December 31
(In US$ millions)	2012		2011		2010
Income taxes at statutory rate		-		-		-
Effect of transfers to new tax jurisdictions		7		(163)		(39	)
Effect of change on uncertain tax positions relating to prior year		91		24		-
Effect of change in taxable currency		-		-		-
Effect of taxable income in various countries		134		328		198
Total		232		189		159

Net deferred tax assets (liabilities)

Deferred Income Taxes

Deferred income taxes reflect the impact of temporary differences between the amount of assets and liabilities recognized for financial reporting purposes and such amounts recognized for tax purposes. The net deferred tax assets (liabilities) consist of the following:

Deferred Tax Assets:

(In US$ millions)	December 31, 2012		December 31, 2011
Pension		8		11
Provisions		3		15
Property, plant and equipment		-		9
Other		2		8
Gross deferred tax asset		13		43

Deferred Tax Liability:

(In US$ millions)	December 31, 2012		December 31, 2011
Property, plant and equipment		5		-
Gain from sale of fixed assets		23		31
Foreign exchange		54		-
Other		1		13
Gross deferred tax liability		83		44
Net deferred tax		(70)		(1	)

Net deferred taxes are classified as follows:

(In US$ millions)	December 31, 2012		December 31, 2011
Short-term deferred tax asset		-		10
Long-term deferred tax asset		13		33
Short-term deferred tax liability		6		10
Long-term deferred tax liability		77		34
Net deferred tax		70		1

Future taxable income justifies the inclusion of tax loss carry-forward in the calculation of net deferred taxes.

Changes to liabilities related to unrecognized tax benefits

The changes to our liabilities related to unrecognized tax benefits, excluding interest and penalties that we recognize as a component of income tax expense, where as follows:

	Year ended December 31
(In US$ millions)	2012		2011		2010
Balance beginning of period	63		-		-
Additions during the period		91		63		-
Balance end of period		154		63		-

Earliest tax years that remain subject to examination by major taxable jurisdictions

The parent company, Seadrill Limited, is headquartered in Bermuda where we have been granted a tax exemption until 2035. Other jurisdictions in which the Company and its subsidiaries operate are taxable based on rig operations. A loss in one jurisdiction may not be offset against taxable income in another jurisdiction. Thus, the Company may pay tax within some jurisdictions even though it may have an overall loss at the consolidated level. The following table summarizes the earliest tax years that remain subject to examination by the major taxable jurisdictions in which the Company operates:

Jurisdiction	Earliest Open Year
Australia	2008
Nigeria	2007
Norway	2007
Thailand	2003

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Non-controlling interest

12 Months Ended

Dec. 31, 2012

Non-controlling interest [Abstract]

Non-controlling interest

Note 26 – Non-controlling interest

The Company's consolidated Statement of Operations, Balance Sheet and Statement of Cash Flows include North Atlantic Drilling Ltd, whose issued share capital is 73.2% and Seadrill Partners LLC, whose issued share capital is 75.7% owned by the Company. The part of North Atlantic Drilling Ltd and Seadrill Partners LLC's total shareholders' equity not attributable to the Company is included in non-controlling interest.

On October 24, 2012, Seadrill Partners LLC completed its IPO of 10,062,500 common units representing limited liability company interests in Seadrill Partners LLC at a price of US$22.00 per unit, for gross proceeds of US$221.4 million and expenses of US$18.7 million (including 1,312,500 common units issued in connection with the exercise of the over-allotment option). Seadrill Partners LLC is listed on the New York stock exchange ("NYSE") under the symbol "SDLP". Upon completion of the offering, Seadrill Limited owned 14,752,525 common units and 16,543,350 subordinated unites which is 75.7% of the limited liability company interests in Seadrill Partners LLC. Seadrill Partners' only cash generating assets are its ownership interest in Seadrill Operating LP and Seadrill Capricorn Holdings LLC (collectively, "OPCO"). OPCO's fleet consists of two ultra-deepwater semi-submersible rigs (the West Aquarius and the West Capricorn), one ultra-deepwater drillship (the West Capella), and one semi-tender rig. (the West Vencedor), all of which operate under long-term contracts.

In 2007 and 2008 the Company entered into five sale and leaseback arrangements for drilling rigs with Ship Finance, who incorporated subsidiary companies for the sole purpose of owning and leasing the rigs. The Company has recognized these subsidiary companies as VIEs and concluded that Seadrill is their primary beneficiary. Accordingly, these subsidiary companies are included in the Company's consolidated accounts, with the Ship Finance equity in these companies included in non-controlling interest. In 2011, the Company acquired all the shares in one of these Ship Finance companies, Rig Finance II Ltd for $47 million. As a consequence of this, Rig Finance II Ltd is no longer treated as a VIE but a wholly owned subsidiary.

Changes in non-controlling interest in 2012, 2011 and 2010 are as follows:

(In US$ millions)	Scorpion		Archer			Ship Finance			North Atlantic		Seadrill Partners LLC		Total
December 31, 2010		-		326			213			-		-		539
Changes in 2011		-		(320	)		(46	)		71		-		(295	)
2011 net (loss)/income		-		(6	)		48			39		-		81
December 31, 2011		-		-			215			110		-		325
Changes in 2012		-		-			20			10		69		99
2012 net (loss)/income		-		-			39			48		10		97
December 31, 2012		-		-			274			168		79		521

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Other revenues (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other revenues [Abstract]
Amortization of unfavorable contracts	$ 0	$ 24	$ 39
Amortization of favorable contracts	(12)	(23)	(13)
Revenues related party	15	0	0
Total	3	1	26
Useful economic lives of unfavorable contracts, lower range	2 years
Useful economic lives of unfavorable contracts, upper range	5 years
Useful economic lives of favorable contracts, lower range	20 months
Useful economic lives of favorable contracts, upper range	36 months
Unamortized amount of favorable contracts	$ 3

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Variable Interest Entities (VIEs) (Tables)

12 Months Ended

Dec. 31, 2012

Variable Interest Entities (VIEs) [Abstract]

Summary of sale and leaseback arrangements

As of December 31, 2012, the Company leased a drillship and two semi-submersible rigs from VIEs under finance leases. Each of the units had been sold by the Company to single purpose subsidiaries of Ship Finance Ltd and simultaneously leased back by the Company on bareboat charter contracts for a term of 15 years. The Company has several options to repurchase the units during the charter periods, and obligations to purchase the assets at the end of the 15 year lease period. The following table gives a summary of the sale and leaseback arrangements, as of December 31, 2012:

Unit	Effective from	Sale value (In US$ millions)		First repurchase option (In US$ millions)		Month of first repurchase option	Last repurchase option * (In US$ millions)		Month of last repurchase Option *
West Polaris	Jul 2008		850		548	September 2012		178	Jun 2023
West Taurus	Nov 2008		850		418	February 2015		149	Nov 2023
West Hercules	Oct 2008		850		580	August 2011		135	Aug 2023

Summary of the bareboat charter rates per day based on Base LIBOR Interest Rate for the next five years

The bareboat charter rates are set on the basis of a Base LIBOR Interest Rate for each bareboat charter contract, and thereafter are adjusted for differences between the LIBOR fixing each month and the Base LIBOR Interest Rate for each contract. A summary of the bareboat charter rates per day for each unit is given below. The amounts shown are based on the Base LIBOR Interest Rate, and reflect average rates for the year.

				2013		2014		2015		2016		2017
	Base LIBOR Interest Rate			(In US$ thousands)		(In US$ thousands)		(In US$ thousands)		(In US$ thousands)		(In US$ thousands)
West Polaris		2.85	%		223.3		176.5		175.4		170.0		170.0
West Taurus		4.25	%		316.2*		320.7		165.0		158.8		157.5
West Hercules		4.25	%		250.0		238.5		180.0		172.5		170.0

Assets and liabilities in the statutory accounts of the VIEs

The assets and liabilities in the statutory accounts of the VIEs as at December 31, 2012 and as at December 31, 2011 are as follows:

(In US$ millions)	December 31, 2012				December 31, 2011
	SFL		SFL		SFL		SFL
	West		Deepwater		West		Deepwater
	Polaris		Ltd.		Polaris		Ltd.
	Limited				Limited
Name of unit	West		West		West		West
	Polaris		Taurus		Polaris		Taurus
			and West				and West
			Hercules				Hercules
Investment in finance lease		534		1,120		611		1,240
Other assets		7		20		12		23
Total assets		541		1,140		623		1,263
Long term debt		360		-		398		822
Other liabilities		107		989		174		326
Total liabilities		467		989		572		1,148
Equity		74		151		51		115
Book value of units in the Company's consolidated accounts		594		1,035		614		1,021

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Investment in associated companies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Equity method investment, summarized balance sheet information [Abstract]
Current assets	$ 995		$ 1,843
Non-current assets	4,330		4,344
Current liabilities	1,343		1,225
Non-current liabilities	1,916		2,102
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	2,627		3,146		1,454
Net operating income	(217)		248		225
Net income	(302)		108		225
Investment in associated companies	509		721
Equity method investment, equity information [Abstract]
Equity in statutory accounts	816		984		225
SapuraCrest [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	0.00%	[1]	23.59%		23.60%
Percentage of ownership, consolidation method (in hundredths)	6.30%
Equity method investment, summarized balance sheet information [Abstract]
Current assets			716
Non-current assets			514
Current liabilities			505
Non-current liabilities			198
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues			866		1,043
Net operating income			166		118
Net income			147		122
Investment in associated companies	0		106
Equity method investment, equity information [Abstract]
Equity in statutory accounts	0		124		112
Varia Perdana [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	49.00%		49.00%		49.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	98		136
Non-current assets	154		157
Current liabilities	37		64
Non-current liabilities	0		33
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	106		119		164
Net operating income	85		96		99
Net income	83		96		99
Ownership percentage held by equity method investee (in hundredths)	51.00%
Investment in associated companies	108		102
Equity method investment, equity information [Abstract]
Equity in statutory accounts	105		96		100
Tioman [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	49.00%		49.00%		49.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	82		80
Non-current assets	1		0
Current liabilities	61		70
Non-current liabilities	0		0
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	157		190		247
Net operating income	12		2		9
Net income	6		(4)		5
Ownership percentage held by equity method investee (in hundredths)	51.00%
Investment in associated companies	7		1
Equity method investment, equity information [Abstract]
Equity in statutory accounts	10		5		7
C6 [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	0.00%	[2]	0.00%	[2]	50.00%	[2]
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues					0
Net operating income					(1)
Net income					(1)
Equity method investment, equity information [Abstract]
Equity in statutory accounts	0		0		6
Archer [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	39.90%		39.90%	[2]	0.00%	[2]
Equity method investment, summarized balance sheet information [Abstract]
Current assets	639		638
Non-current assets	1,945		2,176
Current liabilities	685		466
Non-current liabilities	972		1,061
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	2,191		1,855
Net operating income	(322)		16
Net income	(375)		(77)
Investment in associated companies	121		393
Equity method investment, Quoted market value	121
Equity method investment, equity information [Abstract]
Equity in statutory accounts	370		514		0
AOD [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	66.20%	[3]	33.80%	[3]	0.00%	[3]
Equity method investment, summarized balance sheet information [Abstract]
Current assets	32		49
Non-current assets	141		122
Current liabilities	6		3
Non-current liabilities	0		0
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	0		0
Net operating income	(2)		4
Net income	(2)		(4)
Investment in associated companies	117		53
Equity method investment, Quoted market value	137
Equity method investment, equity information [Abstract]
Equity in statutory accounts	110		57		0
Sevan Drilling [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	28.50%		28.50%		0.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	133		224
Non-current assets	1,586		1,375
Current liabilities	266		117
Non-current liabilities	791		810
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	173		116
Net operating income	11		8
Net income	(12)		(50)
Investment in associated companies	66		66
Equity method investment, Quoted market value	68
Equity method investment, equity information [Abstract]
Equity in statutory accounts	189		188		0
Seabras Sapura Participacoes [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	50.00%		0.00%		0.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	0
Non-current assets	42
Current liabilities	0
Non-current liabilities	0
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	0
Net operating income	0
Net income	(1)
Ownership percentage held by equity method investee (in hundredths)	50.00%
Number of pipelying vessels	1
Investment in associated companies	21		0
Equity method investment, equity information [Abstract]
Equity in statutory accounts	22		0		0
Seabras Sapura Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	50.00%		0.00%		0.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	0
Non-current assets	117
Current liabilities	0
Non-current liabilities	117
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	0
Net operating income	0
Net income	0
Ownership percentage held by equity method investee (in hundredths)	50.00%
Number of pipelying vessels	2
Investment in associated companies	59		0
Equity method investment, equity information [Abstract]
Equity in statutory accounts	0		0		0
Itaunas Drilling [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	30.00%		0.00%		0.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	5
Non-current assets	114
Current liabilities	109
Non-current liabilities	0
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	0
Net operating income	0
Net income	0
Ownership percentage held by equity method investee (in hundredths)	70.00%
Investment in associated companies	3		0
Equity method investment, equity information [Abstract]
Equity in statutory accounts	3		0		0
Camburi Drilling [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	30.00%		0.00%		0.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	4
Non-current assets	121
Current liabilities	113
Non-current liabilities	0
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	0
Net operating income	0
Net income	0
Ownership percentage held by equity method investee (in hundredths)	70.00%
Investment in associated companies	4		0
Equity method investment, equity information [Abstract]
Equity in statutory accounts	4		0		0
Sahy Drilling [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment ownership (in hundredths)	30.00%		0.00%		0.00%
Equity method investment, summarized balance sheet information [Abstract]
Current assets	2
Non-current assets	109
Current liabilities	66
Non-current liabilities	36
Equity method investment, summarized statement of operations information [Abstract]
Operating revenues	0
Net operating income	(1)
Net income	(1)
Ownership percentage held by equity method investee (in hundredths)	70.00%
Investment in associated companies	3		0
Equity method investment, equity information [Abstract]
Equity in statutory accounts	$ 3		$ 0		$ 0

[1] In 2012, the Company's ownership share in SapuraCrest Petroleum Bhd was reduced from 23.5% to 6.3%. This is now accounted for as marketable securities (refer to note 13)

[2] In February 2011, we deconsolidated our majority-owned subsidiary Archer (formerly Seawell Limited). Archer is now accounted for as an associated company.

[3] During 2012 the Company's ownership in AOD increased from 33.8% to 66.2%. Even though the Company has 66.2% ownership in AOD, the Company does not have control and therefore, we do not consolidate AOD into Seadrill's financial statements as of December 31, 2012. We continue to account for this as an equity method investment.

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Newbuildings (Tables)

12 Months Ended

Dec. 31, 2012

Newbuildings [Abstract]

Newbuildings

(In US$ millions)	December 31, 2012		December 31, 2011
Opening balance		2,531		1,247
Additions		1,267		2,308
Capitalized interest and loan related costs		76		73
Re-classified as Drilling Units		(1,992)		(1,097	)
Closing balance		1,882		2,531

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Segment information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Segment		Dec. 31, 2011		Dec. 31, 2010
Segment information [Abstract]
Number of operating segments	3
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	$ 4,478		$ 4,192		$ 4,041
Depreciation and amortization	615		563		480
Operating Income - net income [Abstract]
Operating income	1,791		1,774		1,625
Unallocated items [Abstract]
Total financial items	(354)		(103)		(294)
Income taxes	(232)		(189)		(159)
Net income	1,205		1,482		1,172
Total assets	19,632		18,304
Goodwill	1,320		1,320		1,676
Total liabilities	13,608		12,002
Capital expenditures - fixed assets	1,690		2,543		2,368
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	4,478		4,192		4,041
Fixed assets - operating drilling units	12,894	[1]	11,223	[1]
Norway [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	815		966		1,393
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	815		966		1,393
Fixed assets - operating drilling units	1,868	[1]	2,007	[1]
UK [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	230		56		151
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	230		56		151
Fixed assets - operating drilling units	1,112	[1]	0	[1]
Brunei [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	95		54		66
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	95		54		66
Fixed assets - operating drilling units	197	[1]	38	[1]
Thailand [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	310		303		165
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	310		303		165
Fixed assets - operating drilling units	354	[1]	605	[1]
Malaysia [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	226		207		62
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	226		207		62
Fixed assets - operating drilling units	690	[1]	333	[1]
Congo [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	2		0		37
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	2		0		37
Fixed assets - operating drilling units	161	[1]
Nigeria [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	419		235		204
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	419		235		204
Fixed assets - operating drilling units	1,148	[1]	1,191	[1]
Canada [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	66		0		0
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	66		0		0
Fixed assets - operating drilling units	546	[1]
USA [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	260		202		186
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	260		202		186
Fixed assets - operating drilling units	1,296	[1]	496	[1]
Brazil [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	629		913		710
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	629		913		710
Fixed assets - operating drilling units	1,714	[1]	2,096	[1]
China [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	183		299		230
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	183		299		230
Fixed assets - operating drilling units	0	[1]	1,091	[1]
Indonesia [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	92		130		159
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	92		130		159
Fixed assets - operating drilling units	99	[1]	321	[1]
Philippines [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	0		0		109
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	0		0		109
Vietnam [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	180		157		150
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	180		157		150
Fixed assets - operating drilling units	337	[1]	336	[1]
Angola [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	358		337		182
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	358		337		182
Fixed assets - operating drilling units	945	[1]	979	[1]
Red Sea [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	0		0		68
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	0		0		68
Trinidad & Tobago [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	83		41		0
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	83		41		0
Fixed assets - operating drilling units	252	[1]	424	[1]
Ghana [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	122		0		0
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	122		0		0
Fixed assets - operating drilling units	655	[1]
Saudi Arabia/Kuwait [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	146		127		69
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	146		127		69
Saudi Arabia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Fixed assets - operating drilling units	661	[1]	331	[1]
Mexico [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	137		49		0
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	137		49		0
Fixed assets - operating drilling units	593	[1]	605	[1]
Other [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	125		116		100
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	125		116		100
Fixed assets - operating drilling units	267	[1]	370	[1]
Floaters [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	2,859		2,694		2,264
Depreciation and amortization	412		358		301
Operating Income - net income [Abstract]
Operating income	1,250		1,328		1,140
Unallocated items [Abstract]
Total assets	13,725		12,600
Goodwill	890		890
Total liabilities	9,514		8,274
Capital expenditures - fixed assets	1,342		1,805		1,330
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	2,859		2,694		2,264
Jack up Rigs [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	861		776		578
Depreciation and amortization	146		135		99
Operating Income - net income [Abstract]
Operating income	225		220		199
Unallocated items [Abstract]
Total assets	4,210		4,200
Goodwill	281		281
Total liabilities	2,918		2,745
Capital expenditures - fixed assets	150		495		877
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	861		776		578
Tender Rigs [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	758		589		482
Depreciation and amortization	57		63		57
Operating Income - net income [Abstract]
Operating income	316		221		222
Unallocated items [Abstract]
Total assets	1,697		1,504
Goodwill	149		149
Total liabilities	1,176		983
Capital expenditures - fixed assets	198		243		134
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	758		589		482
Well Services [Member]
Segment Reporting Information [Line Items]
Revenues (excluding gain on sale of drilling units)	0		133		717
Depreciation and amortization	0		7		23
Operating Income - net income [Abstract]
Operating income	0		5		64
Unallocated items [Abstract]
Capital expenditures - fixed assets	0		0		27
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues (excluding gain on sale of assets)	$ 0		$ 133		$ 717

[1] The fixed assets referred to in the table are the Company's operating drilling units. Asset locations at the end of a period are not necessarily indicative of the geographic distribution of the revenues or operating profits generated by such assets during such period.

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Marketable securities (Details) In Millions, unless otherwise specified	12 Months Ended				1 Months Ended	6 Months Ended		12 Months Ended					12 Months Ended					12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 USD ($)	May 31, 2012 SapuraCrest Bhd [Member] USD ($)	Jun. 30, 2012 SapuraCrest Bhd [Member] USD ($)	Dec. 31, 2011 SapuraCrest Bhd [Member]	Dec. 31, 2012 Sapura Kencana [Member] USD ($)	Dec. 31, 2011 Sapura Kencana [Member] USD ($)	Jun. 30, 2012 Sapura Kencana [Member]	May 30, 2012 Sapura Kencana [Member]	May 17, 2012 Sapura Kencana [Member]	Dec. 31, 2012 Ensco [Member] USD ($)	Dec. 31, 2011 Ensco [Member] USD ($)	Dec. 31, 2012 Petromena [Member] USD ($)	Dec. 31, 2011 Petromena [Member] USD ($)	Dec. 31, 2012 Petromena [Member] NOK	Dec. 31, 2012 Golden Close [Member] USD ($)	Dec. 31, 2011 Golden Close [Member] USD ($)
Marketable securities [Abstract]
Original cost	$ 128	$ 24						$ 124	$ 0				$ 0	$ 5	$ 4	$ 4		$ 0	$ 15
Unrealized gain on marketable securities, net	205	0
Carrying value	333	24						329	0				0	4	4	4		0	16
Marketable Securities, Investee [Line Items]
Ownership interest (in hundredths)							23.59%	11.79%		6.40%		11.80%
Recognized gain	169	0	0		169	84
Percentage of marketable securities held (in hundredths)								6.40%			6.40%				81.10%
Face amount of bond securities held																	2,000
Historic cost	24							0					5		4			15
Fair Market value adjustments recognized via OCI	1			206				0					0		0			1
Fair Market value adjustments recognized via P&L	0	(1)						0	0				0	(1)	0	0		0	0
Net book value	24							0					4		4			16
Additions	237							237					0		0			0
Fair market value adjustments recognized via OCI	84							84					0		0			0
Release of OCI into profit & loss	(85)	(416)	0					(84)					0		0			(1)
Realization of historic cost	(132)							(113)					(4)		0			(15)
Other than temporary impairments	0	(10)	(15)					0					0		0			0
Historic cost	128	24						124	0				0	5	4	4		0	15
Fair Market value adjustments recognized via OCI	205	(291)	(25)					205					0		0			0
Fair Market value adjustments recognized via P&L	0	(1)						0	0				0	(1)	0	0		0	0
Net book value	$ 333	$ 24						$ 329	$ 0				$ 0	$ 4	$ 4	$ 4		$ 0	$ 16

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Gain on sale of assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Significant Acquisitions and Disposals [Line Items]
Gain/loss	$ 0	$ 22	$ 26
West Juno [Member]
Significant Acquisitions and Disposals [Line Items]
Net proceeds		248
Book value on disposal		226
Gain/loss		22
West Larissa [Member]
Significant Acquisitions and Disposals [Line Items]
Net proceeds			55
Book value on disposal			29
Gain/loss			26
Total [Member]
Significant Acquisitions and Disposals [Line Items]
Net proceeds	0	248	55
Book value on disposal	0	226	29
Gain/loss	$ 0	$ 22	$ 26

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Accounts receivable (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts receivable [Abstract]
Allowance for doubtful accounts receivables	$ 13	$ 25

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Taxation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current tax expense [Abstract]
Bermuda	$ 0	$ 0	$ 0
Foreign	167	328	184
Deferred tax expense [Abstract]
Bermuda	0	0	0
Foreign	58	24	14
Deferred taxes acquired during the year	0	0	0
Tax related to internal sale of assets in subsidiary, amortized for group purposes	7	(163)	(39)
Total provision	232	189	159
Effective tax rate (in hundredths)	16.10%	11.30%	12.10%
Statutory income tax rate (in hundredths)	0.00%
Income tax reconciliation [Abstract]
Income taxes at statutory rate	0	0	0
Effect of transfers to new tax jurisdictions	7	(163)	(39)
Effect of change in taxable currency	0	0	0
Effect of change in uncertain tax positions relating to prior years	91	24	0
Effect of taxable income in various countries	134	328	198
Total provision	232	189	159
Deferred Tax Assets [Abstract]
Pension	8	11
Provisions	3	15
Property, plant and equipment	0	9
Other	2	8
Gross deferred tax asset	13	43
Deferred Tax Liability [Abstract]
Property, plant and equipment	5	0
Gain from sale of fixed assets	23	31
Foreign exchange	54	0
Other	1	13
Gross deferred tax liability	83	44
Net deferred tax	(70)	(1)
Net deferred taxes, classified [Abstract]
Short-term deferred tax asset	0	10
Long-term deferred tax asset	13	33
Short-term deferred tax liability	6	10
Long-term deferred tax liability	77	34
Net deferred tax	70	1
Uncertain tax positions [Abstract]
Tax expense recorded relating to uncertain tax positions	91	24
Deferred charges relating to uncertain tax positions		39
Changes to liabilities related to unrecognized tax benefits, excluding interest and penalties [Roll Forward]
Balance beginning of period	63	0	0
Additions for prior years tax positions	91	63	0
Balance end of period	$ 154	$ 63	$ 0
Australia [Member]
Income Tax Examination [Line Items]
Earliest Open Year	2008
Nigeria [Member]
Income Tax Examination [Line Items]
Earliest Open Year	2007
Norway [Member]
Income Tax Examination [Line Items]
Earliest Open Year	2007
Thailand [Member]
Income Tax Examination [Line Items]
Earliest Open Year	2003

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Risk management and financial instruments (Tables)

12 Months Ended

Dec. 31, 2012

Variable Interest Entity [Line Items]

Interest rate swap and cross currency interest rate swap agreements

The Company's interest rate swap and cross currency interest rate swap agreements as at December 31, 2012, were as follows:

Outstanding principal		Receive rate	Pay rate			Length of contract
(In US$ millions)
	50	3 month LIBOR		4.63	%	May 2005 - May 2015
	300	3 month LIBOR		3.16	%	Dec 2008 - Dec 2018
	150	3 month LIBOR		3.34	%	June 2013 - June 2018
	150	3 month LIBOR		3.30	%	June 2013 - June 2018
	200	3 month LIBOR		2.83	%	Jan 2011 - Jan 2018
	200	3 month LIBOR		3.27	%	Mar 2013 - Mar 2018
	350	3 month LIBOR		3.80	%	Sep 2011 - Sep 2017
	300	3 month LIBOR		3.54	%	Sep 2011 - Jun 2017
	71	6 month LIBOR		3.83	%	Mar 2008 - Sep 2016
	350	3 month LIBOR		3.36	%	Sep 2011 - Jun 2016
	100	3 month LIBOR		2.22	%	Jan 2011 - Jan 2016
	100	3 month LIBOR		2.24	%	Jan 2011 - Jan 2016
	200	3 month LIBOR		2.17	%	Jan 2011 - Jan 2016
	200	3 month LIBOR		2.17	%	Jan 2011 - Jan 2016
	250	3 month LIBOR		2.71	%	May 2009 - May 2014
	250	3 month LIBOR		2.62	%	May 2009 - May 2014
	500	3 month LIBOR		2.06	%	Mar 2009 - Mar 2014
	100	3 month LIBOR		2.17	%	Aug 2012 - Aug 2017
	100	3 month LIBOR		2.17	%	Aug 2012 - Aug 2017
	200	3 month LIBOR		2.57	%	June 2012 - June 2017
	100	3 month LIBOR		2.56	%	June 2012 - June 2017
	100	3 month LIBOR		2.74	%	May 2012 - May 2017
	200	3 month LIBOR		2.14	%	May 2011 - Jan 2016
	200	3 month LIBOR		2.14	%	May 2011 - Jan 2016
	100	3 month LIBOR		1.15	%	Dec 2012 – Dec 2019
	289	3 month LIBOR		1.11	%	Oct 2012 – Dec 2019
	289	3 month LIBOR		1.38	%	Oct 2012 – Dec 2022
	100	3 month LIBOR		1.36	%	Oct 2012 – Oct 2019
	250	3 month LIBOR		0.74	%	Nov 2012 – Nov 2017
	200	3 month LIBOR		1.36	%	Oct 2012 – Oct 2019
	200	3 month LIBOR		1.18	%	Dec 2012 – Dec 2019

Carrying value and estimated fair value of financial instruments

The carrying value and estimated fair value of the Company's financial instruments at December 31, 2012 and December 31, 2011 are as follows:

	December 31, 2012				December 31, 2011
(In US$ millions)	Fair value		Carrying value		Fair value		Carrying value
Cash and cash equivalents		318		318		483		483
Restricted cash		402		402		482		482
Current portion of long-term debt		2,066		2,066		1,419		1,419
Long-term portion of floating rate debt		6,287		6,287		7,711		7,711
Long term portion of fixed rate CIRR loans		218		218		250		250
Fixed interest loans		70		69		77		74
Fixed interest convertible bonds		872		561		735		545
Fixed interest bonds		1,360		1,342		333		350
Floating interest bonds		224		224		75		75

Financial instruments measured at fair value on a recurring basis

Financial instruments that are measured at fair value on a recurring basis:

	Fair value		Fair value measurements at reporting date using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In US$ millions)	December 31, 2012		(Level 1)		(Level 2)		(Level 3)
Assets:
Marketable securities		333		329	-			4
Other derivative instruments – short term receivable		11		-		11		-
Total assets		344		329		11		4
Liabilities:
Interest rate swap contracts – short term payable		388		-		388		-
Other derivative instruments – short term payable		8		-		8		-
Total liabilities		396		-		396		-

	Fair value		Fair value measurements at reporting date using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In US$ millions)	December 31, 2011		(Level 1)		(Level 2)		(Level 3)
Assets:
Marketable securities		24		4	-			20
Other derivative instruments – short term receivable		3		1		2		-
TRS equity swap contracts		11		-		11		-
Total assets		38		5		13		20
Liabilities:
Interest rate swap contracts – short term payable		372		-		372		-
Currency forward contracts – short term payable		3		-		3		-
Other derivative instruments – short term payable		39		-		39		-
Total liabilities		414		-		414		-

Roll forward of fair value measurements using unobservable inputs (Level 3)

Roll forward of fair value measurements using unobservable inputs (Level 3):

(In US$ millions)
Beginning balance January 1, 2012	20
Realization	(16	)
Purchase	-
Changes in fair value of bonds	-
Closing balance December 31, 2012	4

Consolidated Variable Interest Entities [Member]

Variable Interest Entity [Line Items]

Interest rate swap and cross currency interest rate swap agreements

Two of the Ship Finance subsidiaries consolidated by the Company as VIE's have entered into interest rate swaps in order to mitigate the Company's exposure to variability in cash flows for future interest payments on the loans taken out to finance the acquisition of West Polaris and West Taurus. These interest rate swaps qualify for hedge accounting and any changes in their fair value are included in "Other comprehensive income/loss". Below is a summary of the notional amounts, fixed interest rates payable and durations of these interest rate swaps.

Outstanding principal	Receive rate	Pay rate			Length of contract
(In US$ millions)
470 (West Polaris )	1 month LIBOR		3.89	%	July 2008 - Oct 2012
518 (West Taurus)	1 month LIBOR		2.19	%	Dec 2008 - Aug 2013

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Drilling units

12 Months Ended

Dec. 31, 2012

Drilling units [Abstract]

Drilling units

Note 18 – Drilling units

(In US$ millions)	December 31, 2012		December 31, 2011
Cost		15,177		12,898
Accumulated depreciation		(2,283)		(1,675)
Net book value		12,894		11,223

Depreciation and amortization expense was $608 million, $547 million and $448 million for the years ended December 31, 2012, 2011 and 2010, respectively.

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Gain on sale of assets (Tables)

12 Months Ended

Dec. 31, 2012

Gain on sale of assets [Abstract]

Gain on sale of assets

The Company has recognized the following gains and losses on sales of assets:

(In US$ millions)	Net proceeds		Book value on disposal		Gain/Loss
Year ended December 31, 2012:		-		-		-
Total for year ended December 31, 2012		-		-		-
Year ended December 31, 2011:
Sale of jack-up West Juno		248		226		22
Total for year ended December 31, 2011		248		226		22
Year ended December 31, 2010:
Sale of Jack-up rig West Larissa		55		29		26
Total for year ended December 31, 2010		55		29		26

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Subsequent Events

12 Months Ended

Dec. 31, 2012

Subsequent Events [Abstract]

Subsequent Events

Note 35 – Subsequent Events

On November 15, 2012 – a subsidiary of Seadrill Ltd entered into an agreement with Songa Eclipse Ltd to acquire the ultra-deepwater semi-submersible drilling rig, "Songa Eclipse" for cash consideration of US$590 million. The cash consideration also includes the acquisition of the drilling contract with Total Offshore Angola that is fixed and ending in December 2013 with three one year options to extend the contract. This acquisition is in line with our strategy of building a modern fleet through selective acquisitions and organic growth giving us an increased exposure to the ultra-deepwater market. A prepayment of $59 million was made before the end of 2012 and the physical delivery and final payment took place January 3, 2013 which is considered to be the acquisition date. This purchase is considered to constitute a business combination for accounting purposes. The Company is still in the process of determining the allocation of the purchase price to the identified assets and liabilities acquired, due to the acquisition being recently completed.

On January 16, 2013 – Tullow plc has exercised its contractual option to extend the contract for the ultra-deepwater semi-submersible rig West Leo by two years from May 2016 to May 2018. The West Leo is expected to carry out operations in West Africa until the end of its contract in May 2018. The potential contract revenue for the extension is estimated to approximately US$450 million based on 97 percent utilization and includes a performance bonus arrangement. This brings the total estimated contract value to US$1.13 billion. In line with the omnibus agreement terms and conditions between Seadrill and Seadrill Partners, Seadrill is obligated to offer the West Leo to Seadrill Partners at a fair market price.

On January 30, 2013 – the Company received and accepted an attractive offer from a commercial bank to finance its current exposure to Sevan Drilling ASA ("Sevan") through a forward agreement. The Company sold in connection with this its existing 96,000,000 shares and received a forward agreement with exposure to the same number of shares. The shares have been sold at NOK 3.95 per share. The forward agreement runs until 30 April 2013 and has a strike price of NOK 3.9851. Following the new agreement Seadrill are not longer directly owners of any shares in Sevan, but are exposed though forward agreements to 96,000,000 shares or 28,52 percent of the outstanding shares. The total ownership percentage has been calculated based on an issued share capital in Sevan of 336,625,000 shares and do not include the issuance of the new planned private placement.

On January 31, 2013 – the Company entered into an agreement for the construction of two high specification jack-up drilling rigs with Dalian Shipbuilding Industry Offshore Inc in China. The new units are scheduled for delivery during the first and second quarter 2015, and the estimated total project price is approximately US$230 million (including project management, capitalized interest, drilling and handling tools, spares and operation preparations) per rig, with tail-heavy payment terms.

On February 6, 2013 – our subsidiary Seadrill Janus Ltd. completed the sale of the jack-up drilling unit WestJanus for a total consideration of $73 million.

On February 7, 2013 - the Company participated in a private placement in Sevan Drilling ASA, and was allocated 81,828,500 shares at a subscription price of NOK 3.95. Subsequently, Seadrill received and accepted an offer from a commercial bank to finance these shares. In connection to this, Seadrill has transferred its entire allocation to the same commercial bank and entered into a forward agreement to buy the same number of shares. The forward agreement runs until May 6, 2013 and has a strike price of NOK 3.9815 per share. Following this transaction, Seadrill will not directly hold any shares in Sevan, but will be exposed through forward agreements to 177,828,500 shares or 29.9 percent of the outstanding shares following completion of the private placement.

On February 11, 2013 – the Company and SapuraKencana Petroleum Berhad ("SapuraKencana") entered into a conditional sale and purchase agreement in relation to the proposed transaction. SapuraKencana will acquire all the tender rigs in Seadrill's fleet except for the West Vencedor, T15, and T16. These three rigs are either owned or planned to be owned by Seadrill Partners LLC. Seadrill will in a transition period in co-operation with SapuraKencana retain the management of all tender rigs that are in operation outside Asia. The agreed acquisition price is for an enterprise value of US$2.9 billion less adjustments and includes future capital commitments for newbuildings T17, T18, and West Esperanza. The Company will furthermore continue to manage and supervise the construction of the current new building program on behalf of SapuraKencana. The enterprise value includes all the debt in the tender rig business which is estimated at US$780 million as of February 6, 2013. Seadrill has agreed to pay US$75 million to SapuraKencana at closing to compensate for cash flow from the tender rig business from February 8, 2013 to closing, netted off for lost interest income. The transaction closed on April 30, 2013.

On February 11, 2013 – the Company participated in a private placement of 82,003,000 shares in Archer Limited. The shares were acquired at price US$1.20 per share. As part of the private placement the short term unsecured loan of US$55 million granted to Archer in November was converted to shares. Furthermore, Seadrill will receive 2,811,793 shares in Archer as compensation for underwriting parts of the private placement. Following this purchase and the receipt of the underwriting commission, Seadrill will be the owner of 231,053,239 shares in the Archer Limited, corresponding to 39.9% of the total number of outstanding shares in the Archer Limited.

On March 5, 2013 – the Company exercised fixed price options for the construction of two high specification jack-up drilling rigs at Dalian Shipbuilding Industry Offshore Co., Ltd. (DSIC Offshore) in China. The estimated total project price is approximately US$230 million.

On March 5, 2013– the Company successfully completed a NOK 1,800 million ($316 million) senior unsecured bond issue with maturity in 2018. An application will be made for the bonds to be listed on Oslo Børs. The net proceeds from the bond issue will be used for general corporate purposes, including payments under recently announced newbuilding contracts.

On March 12, 2013 – the Company participated in a private placement in Asia Offshore Drilling Limited (AOD). AOD raised a total of US$100 million in the private placement. Seadrill Limited and Mermaid Maritime Plc, the majority shareholders in the Company, subscribed pro-rata to the entire share capital issue. Seadrill Limited and Mermaid Maritime Plc, will own 66.18 percent and 33.76 percent of the Company respectively post the transaction. AOD I was delivered January 31, 2013, and AOD II was delivered April 15, 2013. As of April 22, 2013, AOD has one jack-up under con struction at the Keppel FELS shipyard in Singapore.

On March 19, 2013 – the Company signed a new $1,450 million facility with various commerical lending institutions and export credit agencies, to fund the aquisition of the West Auriga and the West Vela, which have been pledged as security. The facility bears interest at LIBOR plus a margin in the range of 2.7% to 3.0%, with maturity date in 2025. As at April 30, 2013, this facility has not yet been drawn down.

On March 25, 2013 – the Company and the other major shareholder in AOD, Mermaid Maritime Plc, signed a shareholder resolution that changed the board composition in favor of the Company. Based on this change we now control the Board and therefore also the company considering the fact that we as of March 25th owned 66.18% of the shares in AOD. March 25th is considered the acquisition date and we have concluded that we will consolidate the financial results and balance sheet of AOD from this date. The acquisition is considered to constitute a business combination achieved in stages for accounting purposes. The Company is still in the process of determining the accounting consequences due to the acquisition being recently completed.

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Accounting policies (Details)	12 Months Ended
	Dec. 31, 2012 Segment
Property, Plant and Equipment [Line Items]
Escalation of dayrates (in hundredths)	0.00%
Defined benefit pension plans [Abstract]
Threshold percentage for recognizing actuarial gains and losses (in hundredths)	10.00%
Segment reporting [Abstract]
Number of reportable business segments	3
Overhauls of drilling units [Member]
Property, Plant and Equipment [Line Items]
Estimated economic useful life	5 years
Drilling units [Member]
Property, Plant and Equipment [Line Items]
Estimated economic useful life	30 years
Period within which management is actively committed to a probable sale of assets classified as held for sale	1 year
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated economic useful life	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated economic useful life	5 years

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Other non-current liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Other non-current liabilities [Abstract]
Accrued pension liabilities	$ 55	$ 43
Long term portion of deferred mobilization revenues	225	130
Other non-current liabilities	8	15
Total other non-current liabilities	$ 288	$ 188

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Related party transactions

12 Months Ended

Dec. 31, 2012

Related party transactions [Abstract]

Related party transactions

Note 30 – Related party transactions

The Company transacts business with the following related parties, being companies in which our principal shareholders Hemen Holding Ltd and Farahead Investments Inc (hereafter jointly referred to as "Hemen") and companies associated with Hemen have a significant interest:

— Ship Finance International Limited ("Ship Finance")

— Asia Offshore Drilling Limited ("AOD")

— Metrogas Holdings Inc ("Metrogas")

— Frontline Management (Bermuda) Limited ("Frontline")

— Archer Limited ("Archer")

The Company has entered into sale and lease back contracts for several drilling units with Ship Finance, a company in which our principal shareholders Hemen and companies associated with Hemen have a significant interest. Hemen is controlled by trusts established by the Company's President and Chairman Mr. John Fredriksen for the benefit of his immediate family. The Company has determined that the Ship Finance subsidiaries, which own the units, are variable interest entities (VIEs), and that the Company is the primary beneficiary of the risks and rewards connected with the ownership of the units and the charter contracts.

Accordingly, these VIEs are fully consolidated in the Company's consolidated accounts. The equity attributable to Ship Finance in the VIEs is included in non-controlling interests in the Company's consolidated accounts (See also note 33).

In the 12 months ended December 31, 2012, the Company incurred the following lease costs on units leased back from Ship Finance subsidiaries.

(US$ millions)	2012		2011
West Prospero	-			7
West Polaris		114		126
West Hercules		75		120
West Taurus		114		112
Total		303		365

These lease costs are eliminated on consolidation.

On July 1, 2010 our fully consolidated VIEs, SFL Deepwater Ltd and SFL Polaris Ltd, paid a dividend of $290 million and $145 million respectively to Ship Finance. Ship Finance simultaneously granted loans to SFL Deepwater Ltd and SFL Polaris Ltd for the same amounts. The loans bear interest at 4.5% per annum and comprise the balance of $435 million, reported as long-term debt due to related parties in our balance sheet as of December 31, 2012.

On June 24, 2011, we entered into a share sale and purchase agreement with Ship Finance, where we acquired all the shares of Rig Finance II Limited, which was the owner of West Prospero. The acquisition price for the shares amounted to $47 million. This transaction is accounted for as an equity transaction and no gain or loss is recognized.

In July 2011, we participated in a private placement in Asian Offshore Drilling (AOD) and were allocated shares for $54 million, which corresponds to a 33.75% ownership stake. AOD was established by Mermaid Maritime Public Company Limited in late 2010 when two MOD-V B Class jack-up rigs where ordered at Keppel FELS in Singapore. AOD had additional option agreements for construction of two similar units. Furthermore, it was agreed that we would be responsible for the construction supervision, project management and commercial management of all of AODs jack-up rigs. During the year of 2012 the Company has acquired additional shares in AOD and the Company's holding of AOD as of December 31, 2012 was 26,463,050, representing 66.16% of all of the issued shares in AOD. This investment is accounted for as an equity method investment (See also note 16).

On March 31, 2012, we obtained a short-term unsecured credit facility of $84 million from Metrogas. The principal plus interest was repaid in June 2012.

On May 15, 2012 we obtained a short term unsecured credit facility of US$50 million from Metrogas. The principal plus interest was repaid in July 2012.

On June 7, 2012 we obtained a long term unsecured credit facility of NOK1,200 million from Metrogas. This loan agreement was amended on June 14 and June 27 increasing the loan amount to a total of NOK2,100 (US$352 million). The principal plus interest was repaid in September 2012.

On June 27, 2012, we granted Archer a long term unsecured credit facility of US$20 million. The principal plus interest was repaid in July 2012.

On November 12, 2012, we granted Archer a short term unsecured loan of US$55 million. The loan bears interest of LIBOR + a margin and matured in February 2013.

On December 20, 2012, we sold it's holding in North Atlantic Drilling Ltd unsecured bond of US$500 million to Metrogas plus accrued interest of US$9 million with a call option to repurchase the bond in full for a price equal to par plus unpaid accrued interest on the date of repurchase. The call option matures in June 2013. The obligation is recorded as a long term related party liability. In conjunction with this arrangement we also entered into a agreement to settle dividend payable to Metrogas in return for a short term unsecured loan of US$93 million. The bond bear a coupon of 7.75% per annum payable semi-annually in arrears. The net proceeds from these arrangements were US$415 million.

On December 21, 2012, we obtained a short term loan of US$93 million from Metrogas. The loan bears interest of LIBOR + a margin and matures in March 2013 and is reported as short term debt to related parties in our balance sheet as of December 31, 2012.

On December 31, 2012, we obtained a short term loan from Metrogas of NOK140 million. The loan bears interest of NIBOR + a margin and matures in March 2013 and is reported as short term debt to related parties in our balance sheet as of December 31, 2012.

Frontline provides management support and administrative services for the Company, and charged the Company fees of $2 million, $2 million and $1 million for these services in the years 2012, 2011 and 2010, respectively. These amounts are included in "General and administrative expenses".

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Deconsolidation of subsidiary (Tables)

12 Months Ended

Dec. 31, 2012

Deconsolidation of subsidiary [Abstract]

Re-measurement of any retained equity interest in former subsidiary at fair value

A change in control is considered a re-measurement event; therefore, upon losing control of Archer, we re-measured at fair value any retained equity interest in the former subsidiary.

(In US$ millions)	December 31, 2011
Fair value of the consideration received		-
Fair value of the retained non-controlling investment		711
The carrying amount of non-controlling interest in Archer		330
The carrying amount of Archer's assets and liabilities		(564)
Accumulated translation adjustments recycled from OCI into profit & loss		70
Accumulated actuarial loss recycled from OCI into profit & loss		(7)
Total gain		540

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Share capital (Tables)

12 Months Ended

Dec. 31, 2012

Share capital [Abstract]

Share capital

	2012					2011						2010
All shares are common shares of $2.00 par value each	Shares			$millions		Shares			$millions			Shares			$millions
Authorized share capital		800,000,000			1,600		800,000,000			1,600			800,000,000			1,600
Issued and fully paid share capital		469,250,933			938		469,250,933			938			443,308,487			887
Treasury shares held by Company		(72,859	)		-		(1,478,759	)		(3	)		(182,796	)		(1	)
Outstanding shares in issue		469,178,074			938		467,772,174			935			443,125,691			886

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Other non-current assets (Tables)

12 Months Ended

Dec. 31, 2012

Other non-current assets [Abstract]

Other non-current assets

(In US$ millions)	December 31, 2012		December 31, 2011
Other non-current assets consists of:
Deferred charges – long-term portion		74		65
Deferred tax effect of internal transfer of assets		140		149
Favorable contracts		-		2
Deferred mobilization costs – long-term portion		118		-
Other		70		18
Total other non-current assets		402		234

Deferred charges

(In US$ millions)	December 31, 2012			December 31, 2011
Debt arrangement fees		241			204
Accumulated amortization		(143	)		(113	)
Total book value		98			91
Less: Short-term portion		(24	)		(26	)
Long-term portion		74			65
Amortization for the period		30			31

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Earnings per share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings per share [Abstract]

Components of numerator and denominator for calculation of basic and diluted earnings per share

The components of the numerator and denominator for the calculation of basic and diluted earnings per share resulting from continuing operations are as follows:

	Net income		Weighted average million of shares outstanding		Earnings per share
2010
Earnings per share		1,117		409		2.73
Effect of dilution:
Convertible bonds		228		60
Share options		-		2
Diluted earnings per share**		1,345		471		2.73
2011
Earnings per share		1,401		459		3.05
Effect of dilution:
Convertible bonds		45		28
Share options		-		1
Diluted earnings per share		1,446		488		2.96
2012
Earnings per share		1,108		469		2.37
Effect of dilution:
Convertible bonds		37		20
Share options		-		1
Diluted earnings per share		1,145		490		2.34

**The loss on debt extinguishment of $145 million has been added back to net income in addition to interest expenses related to the convertible bonds. These effects are anti-dilutive, and exceed the effect of increased denominator when calculating the diluted earnings per share. As a consequence of this, the diluted earnings per share equal basic earnings per share.

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Accounting policies

12 Months Ended

Dec. 31, 2012

Accounting policies [Abstract]

Accounting policies

Note 2- Accounting policies

Use of estimates

Preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Contract revenue

A substantial majority of the Company's revenues are derived from dayrate based drilling contracts (which may include lump sum fees for mobilization and demobilization) and other service contracts. Both dayrate based and lump sum fee revenues are recognized ratably over the contract period when services are rendered. Under some contracts, the Company is entitled to additional payments for meeting or exceeding certain performance targets. Such additional payments are recognized when any uncertainties are resolved or upon completion of the drilling program.

In connection with drilling contracts, the Company may receive lump sum fees for the mobilization of equipment and personnel or for capital additions and upgrades prior to commencement of drilling services. These up-front fees are recognized as revenue over the contract term, excluding option periods.

In some cases, the Company may receive lump sum non-contingent fees or dayrate based fees from customers for demobilization upon completion of a drilling contract. Non-contingent demobilization fees are recognized as revenue over contract term, excluding option periods not exercised by our customers. Contingent demobilization fees are recognized as earned upon completion of the drilling contract.

Fees received from customers under drilling contracts for capital upgrades are deferred and recognized over the contract term, excluding option periods not exercised.

Reimbursables

Reimbursements received for the purchases of supplies, personnel services and other services provided on behalf of and at the request of our customers in accordance with a contract or agreement are recorded as revenue. The related costs are recorded as reimbursable expenses in the same period.

Other revenues

In a business combination there may exist favorable and unfavorable drilling contracts which are recorded at fair value at the date of acquisition. A favorable or unfavorable drilling contract is a contract that has a dayrate which differs from prevailing market rates at the time of acquisition. The net present value of such contracts is recorded as an asset or liability at the purchase date and subsequently recognized as revenue or reduction to revenue over the contract term.

Mobilization and demobilization expenses

Demobilization costs are costs related to the transfer of a vessel or drilling rig to a safe harbor or different geographic area and are expensed as incurred.

Mobilization costs incurred as part of a contract are capitalized and recognized as expense over the contract term, excluding option periods not exercised by our customers. The costs of relocating drilling units that are not under contract are expensed as incurred.

Rig Operating Expenses

Rig operating expenses are costs associated with operating a drilling rig that is either in operation or stacked, and include the remuneration of offshore crews and related costs, rig supplies, insurance costs, expenses for repairs and maintenance as well as costs related to onshore personnel in various locations where we operate the rigs and are expensed as incurred.

Repairs, maintenance and periodic surveys

Costs related to periodic overhauls of drilling units are capitalized under drilling units and amortized over the anticipated period between overhauls, which is generally five years. Related costs are primarily yard costs and the cost of employees directly involved in the work. Amortization costs for periodic overhauls are included in depreciation and amortization expense. Costs for other repair and maintenance activities are included in vessel and rig operating expenses and are expensed as incurred.

Foreign currencies

The Company and the majority of its subsidiaries use the U.S. dollars as their functional currency because the majority of their revenues and expenses are denominated in U.S. dollars. Accordingly, the Company's reporting currency is also U.S. dollars. For subsidiaries that maintain their accounts in currencies other than U.S. dollars, the Company uses the current method of translation whereby the statements of operations are translated using the average exchange rate for the year and the assets and liabilities are translated using the year end exchange rate. Foreign currency translation gains or losses on consolidation are recorded as a separate component of other comprehensive income in shareholders' equity.

Transactions in foreign currencies are translated into U.S. dollars at the rates of exchange in effect at the date of the transaction. Foreign currency assets and liabilities are translated using rates of exchange at the balance sheet date. Gains and losses on foreign currency transactions are included in the consolidated statements of operations.

Current and non-current classification

Receivables and liabilities are classified as current assets and liabilities respectively, if their maturity is within one year of the balance sheet date. Otherwise, they are classified as non-current assets and liabilities.

Cash and cash equivalents

Cash and cash equivalents consist of cash, bank deposits and highly liquid financial instruments with original maturities of three months or less.

Restricted cash

Restricted cash consists of bank deposits which have been pledged as collateral for certain guarantees issued by a bank or minimum deposits which must be maintained in accordance with contractual arrangements. Restricted cash with maturity longer than one year are classified as non-current assets.

Marketable securities

Marketable equity securities held by the Company are considered to be available-for-sale and, as such, are recorded at fair value with resulting unrealized gains and losses recorded as a separate component of accumulated other comprehensive income in shareholders' equity. The Company also holds marketable securities considered to be trading securities and as such, are recorded at fair value with resulting unrealized gains and losses recorded through the profit and loss statement. Gains and losses on forward contracts to purchase marketable equity securities that do not meet the definition of a derivative are accounted for as available-for-sale.

Receivables

Receivables, including accounts receivable, are recorded in the balance sheet at their nominal amount less an allowance for doubtful accounts. The Company establishes reserves for doubtful accounts on a case-by-case basis when it is unlikely that required payments of specific amounts will occur. In establishing these reserves, the Company considers the financial condition of the customer as well as specific circumstances related to the receivable such as customer disputes. Receivable amounts determined as being unrecoverable are written off.

Impairment of marketable securities and equity method investees

The Company analyzes its available-for-sale securities and equity method investees for impairment at each reporting period to evaluate whether an event or change in circumstances has occurred in that period that may have a significant adverse effect on the value of the investment. The Company records an impairment charge for other-than-temporary declines in value when the value is not anticipated to recover above cost within reasonably period after the measurement date, unless there are mitigating factors that indicate impairment may not be required. If an impairment charge is recorded, subsequent recoveries in value are not reflected in earnings until sale of the securities held as available for sale or of the equity method investee are sold.

Newbuildings

The carrying value of rigs under construction ("Newbuildings") represents the accumulated costs at the balance sheet date. Cost components include payments for yard installments and variation orders, construction supervision, equipment, spare parts, capitalized interest, costs related to first time mobilization and commissioning costs. No charge for depreciation is made until commissioning of the newbuilding has been completed and it is ready for its intended use.

The Company may have option agreements with shipyards to order new rigs at fixed or variable prices which require some or no additional payment upon exercise. Payments for rig purchase options are capitalized at the time when option contracts are acquired or entered into. The Company reviews the expected future cash flows, which would result from the exercise of each option contract on a contract by contract basis to determine whether the carrying value of the option is recoverable.

Capitalized interest

Interest expenses are capitalized during construction of newbuildings based on accumulated expenditures for the applicable project at the Company's current rate of borrowing. The amount of interest expense capitalized in an accounting period shall be determined by applying an interest rate ("the capitalization rate") to the average amount of accumulated expenditures for the asset during the period. The capitalization rates used in an accounting period shall be based on the rates applicable to borrowings outstanding during the period. The Company does not capitalize amounts beyond the actual interest expense incurred in the period.

If the Company's financing plans associate a specific new borrowing with a qualifying asset, the Company uses the rate on that borrowing as the capitalization rate to be applied to that portion of the average accumulated expenditures for the asset that does not exceed the amount of that borrowing. If average accumulated expenditures for the asset exceed the amounts of specific new borrowings associated with the asset, the capitalization rate to be applied to such excess shall be a weighted average of the rates applicable to other borrowings of the Company.

Drilling units

Rigs, vessels and equipment are recorded at historical cost less accumulated depreciation. The cost of these assets, less estimated residual value is depreciated on a straight-line basis over their estimated remaining economic useful lives. The estimated economic useful life of the Company's floaters, jack-up rigs and tender rigs, when new, is 30 years.

Significant investments are capitalized and depreciated in accordance with the nature of the investment. Significant investments that are deemed to increase an asset's value for its remaining useful life are capitalized and depreciated over the remaining life of the asset.

Assets are classified as held for sale when all of the following criteria are met, which are as follows: Management, having the authority to approve the action, commits to a plan to sell the asset (disposal group), the asset (disposal group) is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such assets (disposal groups), an active program to locate a buyer and other actions required to complete the plan to sell the asset (disposal group) have been initiated, the sale of the asset (disposal group) is probable, and transfer of the asset (disposal group) is expected to qualify for recognition as a completed sale, within one year. The term probable refers to a future sale that is likely to occur, the asset (disposal group) is being actively marketed for sale at a price that is reasonable in relation to its current fair value and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

Cost of property and equipment sold or retired, with the related accumulated depreciation and write-downs are removed from the balance sheet, and resulting gains or losses are included in the consolidated statement of operations.

Equipment

Equipment is recorded at historical cost less accumulated depreciation and is depreciated over its estimated remaining useful life, which is between three and five years depending on the type of asset.

Goodwill

The Company allocates the purchase price of acquired businesses to the identifiable tangible and intangible assets and liabilities acquired, with any remaining amount being recorded as goodwill. Goodwill is tested for impairment at least annually at the reporting unit level, which is defined as an operating segment or a component of an operating segment that constitutes a business for which financial information is available and is regularly reviewed by management. The Company has determined that its reporting units are the same as its operating segments for the purpose of allocating goodwill and the subsequent testing of goodwill for impairment.

The Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two step goodwill impairment test.

If the qualitative factors indicate possible impairment, the standard requires the Company to compare the fair value of its reporting units to their carrying value. In the event that the fair value is less than carrying value, the Company must perform an exercise similar to a purchase price allocation in a business combination in order to determine the amount of the impairment charge.

The goodwill impairment test for a reporting unit is based on discounted cash flows. The Company uses estimated future cash flows applying contract dayrates during the firm contract periods and estimated forecasted dayrates for the periods after expiry of firm contract periods. Zero escalation of dayrates for the periods will be assumed. The estimated future cash flows will be based on remaining economic useful lives for the assets, and discounted using a weighted average cost of capital (WACC).

Other intangible assets

Other intangible assets are recorded at historical cost less accumulated amortization. The cost of these assets less estimated residual value is amortized on a straight-line basis over the estimated remaining economic useful lives. Other intangible assets include technology and customer relationships.

Impairment of long-lived assets

The carrying value of long-lived assets that are held and used by the Company are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may no longer be appropriate. The Company assesses recoverability of the carrying value of the asset by estimating the undiscounted future net cash flows expected to result from the asset, including eventual disposition. If the undiscounted future net cash flows are less than the carrying value of the asset, an impairment is made to the market value or the discounted future net cash flows.

Defined benefit pension plans

The Company has several defined benefit plans which provide retirement, death and early termination benefits. The Company's net obligation is calculated separately for each plan by estimating the amount of the future benefit that employees have earned in return for their cumulative service.

The aggregated projected future benefit obligation is discounted to a present value, and the aggregated fair value of any plan assets is deducted. The discount rate is the market yield at the balance sheet date on government bonds in the relevant currency and based on terms consistent with the post-employment benefit obligations. The retirement benefits are generally a function of number of years of employment and amount of employees' remuneration. The plans are primarily funded through payments to insurance companies. The Company records its pension costs in the period during which the services are rendered by the employees. Actuarial gains and losses are recognized in the statement of operations when the net cumulative unrecognized actuarial gains or losses for each individual plan at the end of the previous reporting year exceed 10 percent of the higher of the present value of the defined benefit obligation and the fair value of plan assets at that date. These gains and losses are recognized over the expected remaining working lives of the employees participating in the plans. Otherwise, recognition of actuarial gains and losses is included in other comprehensive income. Those amounts will be subsequently recognized as a component of net periodic pension cost on the same basis as the amounts recognized in accumulated other comprehensive income.

Treasury shares

Treasury shares are recognized at cost as a component of equity. The purchase of treasury shares reduces the Company's share capital by the nominal value of the acquired treasury shares. The amount paid in excess of the nominal value is treated as a reduction of additional paid-in capital.

Derivative Financial Instruments and Hedging Activities

The Company's interest-rate swap agreements, foreign currency options and forward exchange contracts are recorded at fair value. Changes in the fair value of interest-rate swap agreements, forward exchange and currency options contracts, which have not been designated as hedging instruments, are recorded as a gain or loss as a separate line item within Financial Items.

Changes in the fair value of any derivative instrument that we have formally designated as a hedge, are recognized in Accumulated other comprehensive income (loss) in the Consolidated Balance Sheets. Any change in fair value relating to an ineffective portion of a designated hedge is recognized, in the Consolidated Statement of Operations. When the hedged item affects the income statement, the gain or loss included in accumulated other comprehensive income is reported on the same line in the Consolidated Statements of Operations as the hedged item.

Financial instruments such as forward contracts to purchase shares that do not qualify as derivative instruments are not recognized on the balance sheet, unless deemed impaired. Such instruments are off-balance sheet transactions and result in only disclosures to the financial statements.

Income taxes

Seadrill is a Bermuda company. Currently, Seadrill is not required to pay taxes in Bermuda on ordinary income or capital gains as we qualify as an exempt company. The Company has received written assurance from the Minister of Finance in Bermuda that it will be exempt from taxation until March 2035. Certain subsidiaries operate in other jurisdictions where taxes are imposed. Consequently income taxes have been recorded in these jurisdictions when appropriate.

Significant judgment is involved in determining the provision for income taxes. There are certain transactions for which the ultimate tax determination is unclear due to uncertainty in the ordinary course of business. Seadrill recognizes tax liabilities based on its assessment of whether its tax positions are more likely than not sustainable, based on the technical merits and considerations of the relevant taxing authority's widely understood administrative practices and precedence.

Income tax expense consists of taxes currently payable and changes in deferred tax assets and liabilities calculated according to local tax rules. Deferred tax assets and liabilities are based on temporary differences that arise between carrying values used for financial reporting purposes and amounts used for taxation purposes of assets and liabilities and the future tax benefits of tax loss carry forwards. A deferred tax asset is recognized only to the extent that it is more likely than not that future taxable profits will be available against which the asset can be utilized. The amount of deferred tax provided is based upon the expected manner of settlement of the carrying amount of assets and liabilities, using tax rates enacted at the balance sheet date. The impact of tax law changes is recognized in periods when the change is enacted.

Deferred charges

Loan related costs, including debt arrangement fees, are capitalized and amortized over the term of the related loan and are included in interest expense.

Convertible debt

Convertible bond loans issued by the Company include both a loan component (host contract) and an option to convert the loan to shares (embedded derivative).

An embedded derivative, such as a conversion option, may be separated from its host contract and accounted for separately if certain criteria are met (including if the contract that embodies both the embedded derivative and the host contract is not measured at fair value, the economic characteristics and risks of the embedded derivative instrument are not clearly and closely related to the economic characteristics and risks of the host contract and if a separate instrument with the same terms as the embedded instrument would be a derivative).

If an embedded derivative instrument is separated from its host contract, the host contract shall be accounted for based on generally accepted accounting principles applicable to instruments of that type which do not contain embedded derivative instruments.

Total Return Equity Swaps

From time to time, the Company enters into total return equity swaps ("TRS") indexed to the Company's own shares, where the counterparty acquires shares in the Company and the Company carries the risk of fluctuations in the share price of the acquired shares. The fair value of each TRS is recorded as an asset or liability, with the changes in fair value recorded in the consolidated statement of operations. The Company may, from time to time, enter into TRS arrangements indexed to shares in other companies which are accounted for in a similar manner.

Share-based compensation

The Company has established an employee share ownership plan under which employees, directors and officers of the Group may be allocated options to subscribe for new shares in the ultimate parent, Seadrill Limited. The compensation cost for share options is recognized as an expense over the service period based on the fair value of the options granted.

The fair value of the share options issued under the Company's employee share option plans is determined at grant date taking into account the terms and conditions upon which the options are granted, and using a valuation technique that is consistent with generally accepted valuation methodologies for pricing financial instruments, and that incorporates all factors and assumptions that knowledgeable, willing market participants would consider in determining fair value. The fair value of the share options is recognized as personnel expenses with a corresponding increase in equity over the period during which the employees become unconditionally entitled to the options. Compensation cost is initially recognized based upon options expected to vest with appropriate adjustments to reflect actual forfeitures. National insurance contributions arising from such incentive programs are expensed when the options are exercised.

Provisions

A provision is recognized in the balance sheet when the Company has a present legal or constructive obligation as a result of a past event, and it is probable that an outflow of economic benefits will be required to settle the obligation and a reliable estimate of the amount can be made. If the effect is material, provisions are determined by discounting the expected future cash flows at a pre-tax rate that reflects current market assessments of the time value of money and, where appropriate, the risks specific to the liability.

Segment reporting

We have in 2011 and 2012 significantly expanded our fleet of drilling rigs through acquisitions of new rigs and newbuilding orders. In response to this development we reviewed our internal reporting structure including the operating and reporting business segments in 2011. The review resulted in a change in our reporting segments with effect from January 1, 2011.

As of December 31, 2012, the Company has three reportable business segments which include floaters, jack-up rigs and tender rigs. The well services business segment included the activities of Archer which performs various services related to platform drilling, drilling facility engineering, well intervention and oilfield services. With effect from the end of February 2011, Archer has been deconsolidated and the well services segment is no longer part of our consolidated financial statements.

Related parties

Parties are related if one party has the ability, directly or indirectly, to control the other party or exercise significant influence over the other party in making financial and operating decisions. Parties are also related if they are subject to common control or common significant influence. All transactions between the related parties are based on the principle of arm's length.

Earnings per share

Basic earnings per share ("EPS") is calculated based on the income (loss) for the period available to common stockholders divided by the weighted average number of shares outstanding for basic EPS for the period. Diluted EPS includes the effect of the assumed conversion of potentially dilutive instruments which for the Company includes share options and convertible debt. The determination of dilutive earnings per share requires the Company to potentially make certain adjustments to net income and for the weighted average shares outstanding used to compute basic earnings per share unless anti-dilutive.

Reclassifications

Certain reclassifications have been made to prior period amounts to conform to the current year presentation. These reclassifications did not have a material effect on the consolidated financial statements (refer to the Basis of preparation stated above).

Recently Issued Accounting Standards

Balance sheet—Effective January 1, 2013, we will adopt the accounting standards update that expands the disclosure requirements for the offsetting of assets and liabilities related to certain financial instruments and derivative instruments. The update requires disclosures to present both gross information and net information for financial instruments and derivative instruments that are eligible for net presentation due to a right of offset, an enforceable master netting arrangement or similar agreement. The update is effective for interim and annual periods beginning on or after January 1, 2013. We do not expect that our adoption will have a material effect on our consolidated balance sheet.

Balance sheet—Effective January 1, 2013, we will adopt the accounting standards update that requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. generally accepted accounting principles (GAAP) to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. For public entities, the amendments are effective prospectively for reporting periods beginning after December 15, 2012. We do not expect that our adoption will have a material effect on our financial statements.

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Long-term interest bearing debt and interest expenses (Tables)

12 Months Ended

Dec. 31, 2012

Long-term interest bearing debt and interest expenses [Abstract]

Debt facilities

As of December 31, 2012 and 2011, the Company had the following debt facilities:

(In US$ millions)	December 31, 2012		December 31, 2011
Credit facilities
$1,500 facility		882		1,059
$800 facility		227		272
$585 facility		-		337
$100 facility		69		74
$700 facility		560		630
$1,200 facility		867		1,000
$900 facility		731		-
$440 facility		101		-
$1,121 Lloyd's facility		1,019		985
$2,000 facility (North Atlantic)		1,750		1,917
$170 facility		83		92
$550 facility		495		550
$400 facility		360		400
Total Bank Loans + other		7,144		7,316
Ship Finance International Loans
$700 facility		397		470
$1,400 facility		822		939
Total Ship Finance Facilities		1,219		1,409
Bonds and convertible bonds
Bonds		1,567		425
Convertible bonds		561		545
Total Bonds		2,128		970
Other credit facilities with corresponding restricted cash deposit		270		298
Total interest bearing debt		10,761		9,993
Less: current portion		(2,066)		(1,419)
Long-term portion of interest bearing debt		8,695		8,574

Maturities of outstanding debt

The outstanding debt as of December 31, 2012 is repayable as follows:

(In US$ millions)	December 31, 2012
2013		2,066
2014		1,738
2015		1,904
2016		1,017
2017 and thereafter		4,125
Effect of amortization of convertible bond		(89	)
Total debt		10,761

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General information (Policies)

12 Months Ended

Dec. 31, 2012

General information [Abstract]

Basis of presentation

Basis of presentation

The financial statements are presented in accordance with generally accepted accounting principles in the United States of America (US GAAP). The amounts are presented in United States dollar (U.S. dollar) rounded to the nearest million, unless otherwise stated.

The accompanying consolidated financial statements present the financial position of Seadrill Limited, the consolidated subsidiaries and the group's interest in associated entities. Investments in companies in which the Company directly or indirectly holds more than 50% of the voting control are consolidated in the financial statements, as well as certain variable interest entities of which the Company is deemed to be the primary beneficiary.

We have in 2012 and 2011 significantly expanded our fleet of drilling rigs and as a result of this our long term maintenance has increased correspondingly. In response to this, we determined that we had incorrectly classified payments related to long term maintenance as an investing activity rather than as an operating activity in the consolidated statement of cash flows. We concluded that such classification was not material to cash flows from operating activities and investing activities for previously reported periods. Accordingly, the presentation of the consolidated statement of cash flows for the years ending December 31, 2011 and 2010 have been revised. This resulted in a decrease in cash provided by Operating Activities and an increase in cash used by Investing Activities, of $147 million in 2011 and $90 million in 2010.

The accounting policies set out below have been applied consistently to all periods in these consolidated financial statements, unless otherwise noted.

Basis of consolidation

Basis of consolidation

The consolidated financial statements include the assets and liabilities of the Company and its subsidiaries and certain variable interest entities, ("VIE"s) in which the Company is deemed to be the primary beneficiary. All intercompany balances and transactions have been eliminated on consolidation.

A variable interest entity is defined in ASC Topic 810 "Consolidation" ("ASC 810") as a legal entity where either (a) the total equity at risk is not sufficient to permit the entity to finance its activities without additional subordinated support; (b) equity interest holders as a group lack either i) the power to direct the activities of the entity that most significantly impact on its economic success, ii) the obligation to absorb the expected losses of the entity, or iii) the right to receive the expected residual returns of the entity; or (c) the voting rights of some investors in the entity are not proportional to their economic interests and the activities of the entity involve or are conducted on behalf of an investor with a disproportionately small voting interest.

ASC 810 requires a variable interest entity to be consolidated by its primary beneficiary, being the interest holder, if any, which has both (1) the power to direct the activities of the entity which most significantly impact on the entity's economic performance, and (2) the right to receive benefits or the obligation to absorb losses from the entity which could potentially be significant to the entity.

We evaluate our subsidiaries, and any other entities in which we hold a variable interest, in order to determine whether we are the primary beneficiary of the entity, and where it is determined that we are the primary beneficiary we fully consolidate the entity.

Investment in companies in which we hold an ownership interest of between 20% and 50%, and over which we exercise significant influence, but do not consolidate, are accounted for using the equity method. The Company records its investments in associated companies and its share of earnings or losses in the consolidated statements of operations as "Share in results from associated companies." The excess, if any, of purchase price over book value of the Company's investments in equity method investees is included in the accompanying consolidated balance sheets in "Investment in associated companies."

Investments in companies in which our ownership is less than 20% are valued at fair value unless it is not possible to estimate fair value, then the cost method is used.

Intercompany transactions and internal sales have been eliminated on consolidation. Unrealized gains and losses arising from transactions with associates are eliminated to the extent of the Company's interest in the entity.

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Long-term interest bearing debt and interest expenses

12 Months Ended

Dec. 31, 2012

Long-term interest bearing debt and interest expenses [Abstract]

Long-term interest bearing debt and interest expenses

Note 22 – Long-term interest bearing debt and interest expenses

As of December 31, 2012 and 2011, the Company had the following debt facilities:

(In US$ millions)	December 31, 2012		December 31, 2011
Credit facilities
$1,500 facility		882		1,059
$800 facility		227		272
$585 facility		-		337
$100 facility		69		74
$700 facility		560		630
$1,200 facility		867		1,000
$900 facility		731		-
$440 facility		101		-
$1,121 Lloyd's facility		1,019		985
$2,000 facility (North Atlantic)		1,750		1,917
$170 facility		83		92
$550 facility		495		550
$400 facility		360		400
Total Bank Loans + other		7,144		7,316
Ship Finance International Loans
$700 facility		397		470
$1,400 facility		822		939
Total Ship Finance Facilities		1,219		1,409
Bonds and convertible bonds
Bonds		1,567		425
Convertible bonds		561		545
Total Bonds		2,128		970
Other credit facilities with corresponding restricted cash deposit		270		298
Total interest bearing debt		10,761		9,993
Less: current portion		(2,066)		(1,419)
Long-term portion of interest bearing debt		8,695		8,574

The outstanding debt as of December 31, 2012 is repayable as follows:

(In US$ millions)	December 31, 2012
2013		2,066
2014		1,738
2015		1,904
2016		1,017
2017 and thereafter		4,125
Effect of amortization of convertible bond		(89	)
Total debt		10,761

Credit facilities

$1,500 million secured credit facility

In June 2009, the Company entered into a $1,500 million senior secured loan facility with a syndicate of banks and export credit facility agents, to partly fund the acquisition of the jack-up rigs West Capella, West Sirius, West Ariel and West Aquarius, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,733 million. The facility bears interest at LIBOR plus 3.25% per annum and is repayable over a term of five years. The outstanding balance at December 31, 2012 was $882 million, as compared to $1,059 million in 2011. At maturity a balloon payment of $662 million is due. We do not have any undrawn capacity on this facility at year end.

$800 million secured term loan

In August 2005, the Company entered into a $300 million secured term loan facility with a syndicate of banks to partly fund the acquisition of two semi-submersible rigs, West Eminence and West Phoenix, which have been pledged as security. The facility was amended and increased in 2006 to $800 million. The facility was amended again in 2011 due to West Phoenix was moved to North Atlantic Drilling Ltd. As a result of this, only West Eminence was pledged as security as per December 31, 2012. The net book value at December 31, 2012 of the unit pledged as security is $631 million. The facility consists of two tranches, and bears interest at LIBOR plus 1.70% and 3.5% per annum. As of December 31, 2012, the outstanding balance was $227 million, as compared to $272 million in 2011. The final repayment of $183 million is due in 2013. We do not have any undrawn capacity on this facility at year end.

$100 million secured term loan

In April 2008, the Company entered into a $100 million secured term loan facility with two banks to partly fund the acquisition of the tender rig T-11, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $79 million. The facility bears interest at a fixed rate of 3.03% per annum and is repayable over a term of six years. As of December 31, 2012, the outstanding amount on this facility was $69 million, as compared to $74 million in 2011. At maturity a balloon payment of $60 million is due. We do not have any undrawn capacity on this facility at year end.

$700 million secured term loan

In October 2010, the Company entered into a $700 million secured loan facility with a syndicate of banks to partly fund the acquisition of seven jack-up drilling rigs, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,126 million. The facility bears interest at LIBOR plus 2.50% per annum and is repayable over a term of five years. As of December 31, 2012, the outstanding balance was $560 million, as compared to $630 million in 2011. At maturity a balloon payment of $350 million is due in October 2015. We do not have any undrawn capacity on this facility at year end.

$1,200 million secured term loan

In June 2010, the Company entered into a $1,200 million secured facility with a group of various commercial lending institutions and export credit agencies. The loan is secured by first priority mortgages on one ultra-deepwater semi-submersible drilling rig (West Orion), one ultra-deepwater drillship (West Gemini) and one tender rig (West Vencedor). The net book value at December 31, 2012 of the units pledged as security is $1,477 million. The facility bears interest at LIBOR plus 2.25% per annum and is repayable over a term of five years. The outstanding balance as of December 31, 2012, was $867 million, as compared to $1,000 million in 2011. At maturity a balloon payment of $567 million is due. We do not have any undrawn capacity on this facility at year end. We have subsequent to the balance sheet date entered into a renewal of the fixed margin period on the facility commencing on June 25, 2013, with a final maturity in 2015.

$900 million secured term loan

In July 2012, the Company refinanced $585 million loan and entered into new $900 million senior secured credit facility with a group of commercial lending institutions, comprised of a term loan in the amount of $375 million, a term loan in the amount of $150 million, and a revolving facility in the amount of $375 million. This facility has a five year term, and is repayable in quarterly installments of $18.8 million for the first three installments, followed by quarterly installments of $22.5 million thereafter, with a balloon payment of $484 million due at maturity. The facility bears interest at LIBOR plus a margin. The tender rigs West Alliance, West Berani, West Menang, West Pelaut, West Setia, West Jaya, West Esperanza and T-12 are pledged as security. The $585 million facility, which had $312 million outstanding, was repaid with a portion of this facility. As of December 31, 2012, the outstanding balance of this facility was $731 million.

$440 million secured term loan

In December 2012, the Company entered into a $440 million secured term loan facility with a syndicate of banks to fund the delivery of two tender rigs and two jack-up drilling rigs currently under construction. As of December 31, 2012 we have drawn $101 million on the facility and T-15 has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $112 million. The facility bears interest at LIBOR plus 3.25% per annum and is repayable over a term of five years. The outstanding balance as at December 31, 2012 was $100.5 million. The undrawn amount will be available at delivery of the rigs under construction. At maturity a balloon payment of $223 million is due. We do not have any undrawn capacity on this facility at year end.

$1,121 million secured credit facility

In January 2011, the Company entered into a $1,121 million secured credit facility with Lloyds TSB to fund the acquisition of two ultra-deepwater semi-submersible rigs, West Leo and West Pegasus, which has been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,248 million. In 2012 we have further drawn down on this facility for general corporate purposes. The facility bears interest at LIBOR plus a margin and is repayable over a term of seven years. The facility was fully drawn as of December 31, 2012 with a balance of $1,019 million, as compared to $985 million in 2011. At maturity a balloon payment of $498 million is due. We do not have any undrawn capacity on this facility at year end.

$2,000 million secured credit facility

In April 2011, our subsidiary North Atlantic Drilling Ltd entered into a $2,000 million secured credit facility with a syndicate of banks to partly fund the acquisition of six drilling units from Seadrill Ltd, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $2,417 million. The facility has a six year term and bears interest at LIBOR plus 2.00% per annum. As of December 31, 2012, the outstanding balance was $1,750 million, as compared to $1.9 billion in 2011. At maturity a balloon payment of $1,000 million is due. We do not have any undrawn capacity on this facility at year end.

$170 million secured loan facility

In February 2007, the Company entered into a sale and leaseback agreement for the jack-up rig West Prospero with Rig Finance II Ltd, at that time a subsidiary of Ship Finance Limited. In February 2007 Rig Finance II Ltd entered into a $170 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Prospero, which has been pledged as security. In June 2011, the Company acquired all the shares of Rig Finance II Limited. The net book value at December 31, 2012 of the unit pledged as security is $176 million. The facility bears interest at LIBOR plus 0.90 % to 1.20% per annum depending on the ratio of market value to loan, and is repayable over a term of six years. As of December 31, 2012, the outstanding balance was $83 million, as compared to $92 million in 2011. At maturity a balloon payment of $79 million is due. We do not have any undrawn capacity on this facility at year end.

$550 million secured credit facility

In December 2011, the Company entered into a $550 million secured credit facility with a syndicate of banks to partly fund the delivery of the ultra-deepwater semi-submersible drilling unit West Capricorn, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $712 million. The facility has a five year tenor and bears interest at LIBOR plus a margin. As of December 31, 2012, the outstanding balance was $495 million, as compared to $550 million in 2011. At maturity a balloon payment of $275 million is due. We do not have any undrawn capacity on this facility at year end.

$400 million secured credit facility

In December 2011, the Company entered into a $400 million secured credit facility with a syndicate of banks. The Jack-Up rigs West Cressida, West Callisto, West Leda and West Triton has been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $727 million. The facility has a five year term and bears interest of LIBOR plus 2.50% per annum. As of December 31, 2012, the outstanding balance was $360 million, as compared to $400 million in 2011. At maturity a balloon payment of $200 million is due. We do not have any undrawn capacity on this facility at year end.

Ship Finance International Loans

In May 2008, the Company entered into a sale and leaseback agreement for the drillship West Polaris with SFL West Polaris Limited, a subsidiary of Ship Finance. SFL West Polaris Limited is consolidated as a VIE by the Company. In July 2008 SFL West Polaris Limited entered into a $700 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Polaris, which has been pledged as security. The net book value at December 31, 2012 of the unit pledged as security is $594 million. The facility bears interest at LIBOR plus 1.25% per annum and is repayable over a term of five years. At December 31, 2012, the outstanding balance under the facility was $397 million, as compared to $470 million in 2011.

In September 2008, the Company entered into a sale and leaseback agreement for the two semi-submersible rigs West Taurus and West Hercules with SFL Deepwater Ltd, a subsidiary of Ship Finance. SFL Deepwater Ltd is consolidated as a VIE by the Company. In September 2008, SFL Deepwater Ltd entered into a $1,400 million secured term loan facility with a syndicate of banks to partly fund the acquisition of West Taurus and West Hercules, which have been pledged as security. The net book value at December 31, 2012 of the units pledged as security is $1,035 million. The facility bears interest at LIBOR plus 1.40% per annum and is repayable over a term of five years. As of December 31, 2012, the outstanding balance under the facility was $822 million, as compared to $939 million in 2011.

$585 million secured term loan

In December 2006, we entered into a $585 million secured term loan facility with a syndicate of banks to partly fund the acquisition of eight tender rigs, which have been pledged as security. The facility bears interest at LIBOR plus a margin. This facility was fully repaid and refinanced in July 2012, and therefore the balance outstanding as at December 31, 2012 was nil (2011: $337 million).

Bonds and convertible bonds

$350 million fixed interest rate bond

In October 2010, the Company raised $350 million through the issue of a five year bond which matures in October 2015. Interest on the bonds bears a fixed interest of 6.50% per annum, payable semi-annually in arrears. In May 2012, we repurchased $8 million of the bonds. As of December 31, 2012, the outstanding balance was $342 million, as compared to $350 million in 2011.

NOK1,250 million floating interest rate bond

In January 2012, the Company raised $225 million (NOK1,250 million) through the issue of a two year senior unsecured bond, with maturity date of February 13, 2014. The bond bears interest of NIBOR plus 3.25% per annum, payable quarterly in arrears. The bond is listed on the Oslo Stock Exchange.

$1,000 million fixed interest bond

In September 2012, the Company raised $1,000 million through the issue of a five year bond which matures in September 2017. Interest on the bonds bears a fixed interest of 5.625% per annum, payable semi-annually in arrears.

3.375% Convertible Bonds due 2017

In October 2010, the Company issued at par $650 million of convertible bonds. Interest on the bonds is fixed at 3.375%, payable semi-annually in arrears. The bonds are convertible into Seadrill Limited common shares at any time up to ten banking days prior to October 27, 2017. The conversion price at the time of issuance was $38.92 per share, representing a 30% premium to the share price at the time. Since then, dividend distributions have reduced the conversion price to $31.14. For accounting purposes $121 million was, at the time of issuance of the bonds, allocated to the bond equity component and $529 million to the bond liability component. This is due to the cash settlement option stipulated in the bond agreement. Unless previously redeemed, converted or purchased and cancelled, the bonds mature in October 2017. The convertible bonds are tradable, and their market price as of March 13, 2013 was 135% of nominal value. If the bonds were converted into shares at the current conversion price of $31.1364, a further 20,875,888 new shares would be issued. The bond contains covenants, the principle one requiring the Company to maintain a market adjusted equity ratio of at least 30.0%.

NOK 500 million floating interest rate bonds

In September 2005, we raised NOK500 million through the issuance of a seven year bond. The bond bears quarterly interest at the Norwegian Inter-Bank Offer Rate, or NIBOR, plus a margin. We later repurchased NOK391.5 million of the bonds. The bond was repaid upon final maturity in September 2012, therefore the balance outstanding as at December 31, 2012 was nil (2011: $75 million).

Commercial Interest Reference Rate (CIRR) Credit Facilities

In April 2008, the Company entered into a CIRR term loan for NOK850 million with Eksportfinans ASA, the Norwegian export credit agency. The loan bears fixed interest at 4.56% per annum and is repayable over a term of eight years. The outstanding balance at December 31, 2012 was $72 million (NOK400 million), $83 million, in 2011.

In June 2008, the Company entered into a CIRR term loan for NOK904 million with Eksportfinans ASA. The loan bears fixed interest at 4.15% per annum and is repayable over a term of eight years. The outstanding balance at December 31, 2012 was $77 million (NOK425 million), $89 million, in 2011.

In July 2008, the Company entered into a CIRR term loan for NOK1,011 million with Eksportfinans ASA. The loan bears fixed interest at 4.15% per annum and is repayable over a term of twelve years. The outstanding balance at December 31, 2012 was $121 million (NOK674 million), $126 million, in 2011

In connection with the above three CIRR fixed interest term loans totaling $270 million (NOK1,499 million), fixed interest cash deposits equal to the total outstanding loan balances have been established with commercial banks. The collateral cash deposits are reduced in parallel with repayments of the CIRR loans and receive fixed interest at the same rates as those paid on the CIRR loans. The collateral cash deposits are classified as "restricted cash" in the balance sheet, and the effect of these arrangements is that the CIRR loans have no effect on net interest bearing debt.

Covenants on loans and bonds

Bank Loans

In addition to security provided to lenders in the form of pledged assets, bank loan agreements generally contain financial covenants, the main ones being as follows:

— Aggregated minimum liquidity requirement for the group: to maintain cash and cash equivalents of at least $155 million within the group.

— Interest coverage ratio: to maintain an EBITDA to interest expense ratio of at least 2.5:1.

— Current ratio: to maintain current assets to current liabilities ratio of at least 1:1. Current assets are defined as book value less minimum liquidity, but including up to 20.0% of shares in listed companies owned 20.0% or more. Current liabilities are defined as book value less the current portion of long term debt.

— Equity ratio: to maintain total equity to total assets ratio of at least 30.0%. Both equity and total assets are adjusted for the difference between book and market values of drilling units.

— Leverage ratio: to maintain a ratio of net debt to EBITDA no greater than 4.5:1. Net debt is calculated as all interest bearing debt less cash and cash equivalents excluding minimum liquidity requirements. In the event that Seadrill acquire a rig without historic EBITDA available, Seadrill is entitled to base a twelve months historical EBITDA calculation on future projected EBITDA subject to the following:

the rig have a firm charter contract at the time of delivery with a minimum duration of 12 months and a firm charter contract in place at the time of such EBITDA calculation.

Bonds

For the Company's outstanding bonds, the main covenants are as follows;

— Equity Ratio; to maintain a total equity to total assets ratio of at least 30.0%. Both equity and total assets are adjusted for the difference between book value and market values of drilling units.

— Equity ratio, which requires us to maintain a ratio of adjusted equity to total liabilities of at least 40%. Adjusted shareholder's equity is book value of equity adjusted for the difference between book and market values of drilling units.

We are in compliance with all financial loan covenants as of December 31, 2012.

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Other non-current assets

12 Months Ended

Dec. 31, 2012

Other non-current assets [Abstract]

Other non-current assets

Note 21 –  Other non-current assets

(In US$ millions)	December 31, 2012		December 31, 2011
Other non-current assets consists of:
Deferred charges – long-term portion		74		65
Deferred tax effect of internal transfer of assets		140		149
Favorable contracts		-		2
Deferred mobilization costs – long-term portion		118		-
Other		70		18
Total other non-current assets		402		234

Deferred charges represent debt arrangement fees that are capitalized and amortized to interest expense over the life of the debt instrument.

(In US$ millions)	December 31, 2012			December 31, 2011
Debt arrangement fees		241			204
Accumulated amortization		(143	)		(113	)
Total book value		98			91
Less: Short-term portion		(24	)		(26	)
Long-term portion		74			65
Amortization for the period		30			31

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Share capital (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended
	May 10, 2005	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share capital [Abstract]
Authorized share capital, shares (in shares)		800,000,000	800,000,000	800,000,000
Authorized share capital		$ 1,600	$ 1,600	$ 1,600
Issued and fully paid share capital, shares (in shares)		469,250,933	469,250,933	443,308,487
Issued and fully paid share capital		938	938	887
Treasury shares held by Company, shares (in shares)		(72,859)	(1,478,759)	(182,796)
Treasury shares held by Company		0	(3)	(1)
Outstanding shares in issue, shares (in shares)		469,178,074	467,772,174	443,125,691
Outstanding shares in issue		$ 938	$ 935	$ 886
Common shares, par value (in dollars per share)	$ 2.00	$ 2.00	$ 2.00	$ 2.00
Number of shares issued (in shares)	6,000
Number of shares issued due to conversion of convertible debt instruments (in shares)		0	25,942,446

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Investment in associated companies (Tables)

12 Months Ended

Dec. 31, 2012

Investment in associated companies [Abstract]

Percentages of ownership and book value of investments recorded using equity method

The Company has the following investments that are recorded using the equity method:

	December 31, 2012			December 31, 2011			December 31, 2010
SapuraCrest Bhd ("SapuraCrest")*		-	*		23.6	%		23.6	%
Varia Perdana Sdn Bhd ("Varia Perdana")		49.0	%		49.0	%		49.0	%
Tioman Drilling Company Sdn Bhd ("Tioman")		49.0	%		49.0	%		49.0	%
C6 Technologies AS ("C6")***		-			-			50.0	%
Archer ("Archer")***		39.9	%		39.9	%		-
Asia Offshore Drilling ("AOD")**		66.2	%		33.8	%		-
Sevan Drilling ("Sevan Drilling")		28.5	%		28.5	%		-
Seabras Sapura Participacoes SA ("Seabras Sapura Participacoes")		50	%		-			-
Seabras Sapura Holdco Ltd ("Seabras Sapura Holdco")		50	%		-			-
Itaunas Drilling B.V. ("Itaunas Drilling")		30	%		-			-
Camburi Drilling B.V. ("Camburi Drilling")		30	%		-			-
Sahy Drilling B.V. ("Sahy Drilling")		30	%		-			-

Summarized balance sheet information of equity method investees

Summarized balance sheet information of the Company's equity method investees is as follows:

	As of December 31, 2012
(In US$ millions)	Current assets		Non-current assets		Current liabilities		Non-current liabilities
Varia Perdana		98		154		37		-
Tioman		82		1		61		-
Archer		639		1,945		685		972
AOD		32		141		6		-
Sevan Drilling		133		1,586		266		791
Seabras Sapura Participacoes		-		42		-		-
Seabras Sapura Holdco		-		117		-		117
Itaunas Drilling		5		114		109		-
Camburi Drilling		4		121		113		-
Sahy Drilling		2		109		66		36
TOTAL		995		4,330		1,343		1,916

	As of December 31, 2011
(In US$ millions)	Current assets		Non-current assets		Current liabilities		Non-current liabilities
SapuraCrest		716		514		505		198
Varia Perdana		136		157		64		33
Tioman		80		-		70		-
Archer		638		2,176		466		1,061
AOD		49		122		3		-
Sevan Drilling		224		1,375		117		810
TOTAL		1,843		4,344		1,225		2,102

Summarized statement of operations information for the Company's equity method investees is as follows:

Summarized statement of operations information of equity method investees

Summarized statement of operations information for the Company's equity method investees is as follows:

	Year ended December 31, 2012
(In US$ millions)	Operating revenues		Net operating income			Net income
Varia Perdana		106		85			83
Tioman		157		12			6
Archer		2,191		(322	)		(375	)
AOD		-		(2	)		(2	)
Sevan Drilling		173		11			(12	)
Seabras Sapura Participacoes		-		-			(1	)
Seabras Sapura Holdco		-		-			-
Itaunas Drilling		-		-			-
Camburi Drilling		-		-			-
Sahy Drilling		-		(1	)		(1	)
TOTAL		2,627		(217	)		(302	)

	Year ended December 31, 2011
(In US$ millions)	Operating revenues		Net operating income			Net income
SapuraCrest		866		166			147
Varia Perdana		119		96			96
Tioman		190		(2	)		(4	)
Archer		1,855		(16	)		(77	)
AOD		-		(4	)		(4	)
Sevan Drilling		116		8			(50	)
TOTAL		3,146		248			108

	Year ended December 31, 2010
(In US$ millions)	Operating revenues		Net operating income			Net income
SapuraCrest		1,043		118			122
Varia Perdana		164		99			99
Tioman		247		9			5
C6		-		(1	)		(1	)
TOTAL		1,454		225			225

Recorded equity in the statutory accounts of equity method investees

At the year-end the book values of the Company's investment in associated companies are as follows:

(In US$ millions)	December 31, 2012		December 31, 2011
SapuraCrest		-		106
Tioman		7		1
Varia Perdana		108		102
Archer		121		393
AOD		117		53
Sevan Drilling		66		66
Seabras Sapura Participacoes		21		-
Seabras Sapura Holdco		59		-
Itaunas Drilling		3		-
Camburi Drilling		4		-
Sahy Drilling		3		-
Total		509		721

The quoted market prices for Archer, AOD and Sevan Drilling as at December 31, 2012, were $121 million, 137 million and 68 million, respectively. Quoted market prices for all our other equity investments are not available because these companies are not publicly traded

At year-end the share of recorded equity in the statutory accounts of the Company's associated companies are as follows:

(In US$ millions)	December 31, 2012		December 31, 2011		December 31, 2010
SapuraCrest		-		124		112
Tioman		10		5		7
Varia Perdana		105		96		100
C6		-		-		6
Archer		370		514		-
AOD		110		57		-
Sevan Drilling		189		188		-
Seabras Sapura Participacoes		22		-		-
Seabras Sapura Holdco		-		-		-
Itaunas Drilling		3		-		-
Camburi Drilling		4		-		-
Sahy Drilling		3		-		-
Total		816		984		225

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Accounting policies (Policies)

12 Months Ended

Dec. 31, 2012

Accounting policies [Abstract]

Use of estimates

Use of estimates

Preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Contract revenue

Contract revenue

A substantial majority of the Company's revenues are derived from dayrate based drilling contracts (which may include lump sum fees for mobilization and demobilization) and other service contracts. Both dayrate based and lump sum fee revenues are recognized ratably over the contract period when services are rendered. Under some contracts, the Company is entitled to additional payments for meeting or exceeding certain performance targets. Such additional payments are recognized when any uncertainties are resolved or upon completion of the drilling program.

In connection with drilling contracts, the Company may receive lump sum fees for the mobilization of equipment and personnel or for capital additions and upgrades prior to commencement of drilling services. These up-front fees are recognized as revenue over the contract term, excluding option periods.

In some cases, the Company may receive lump sum non-contingent fees or dayrate based fees from customers for demobilization upon completion of a drilling contract. Non-contingent demobilization fees are recognized as revenue over contract term, excluding option periods not exercised by our customers. Contingent demobilization fees are recognized as earned upon completion of the drilling contract.

Fees received from customers under drilling contracts for capital upgrades are deferred and recognized over the contract term, excluding option periods not exercised.

Reimbursables

Reimbursables

Reimbursements received for the purchases of supplies, personnel services and other services provided on behalf of and at the request of our customers in accordance with a contract or agreement are recorded as revenue. The related costs are recorded as reimbursable expenses in the same period.

Other revenues

Other revenues

In a business combination there may exist favorable and unfavorable drilling contracts which are recorded at fair value at the date of acquisition. A favorable or unfavorable drilling contract is a contract that has a dayrate which differs from prevailing market rates at the time of acquisition. The net present value of such contracts is recorded as an asset or liability at the purchase date and subsequently recognized as revenue or reduction to revenue over the contract term.

Mobilization and demobilization expenses

Mobilization and demobilization expenses

Demobilization costs are costs related to the transfer of a vessel or drilling rig to a safe harbor or different geographic area and are expensed as incurred.

Mobilization costs incurred as part of a contract are capitalized and recognized as expense over the contract term, excluding option periods not exercised by our customers. The costs of relocating drilling units that are not under contract are expensed as incurred.

Rig operating expenses

Rig Operating Expenses

Rig operating expenses are costs associated with operating a drilling rig that is either in operation or stacked, and include the remuneration of offshore crews and related costs, rig supplies, insurance costs, expenses for repairs and maintenance as well as costs related to onshore personnel in various locations where we operate the rigs and are expensed as incurred.

Repairs, maintenance and periodic surveys

Repairs, maintenance and periodic surveys

Costs related to periodic overhauls of drilling units are capitalized under drilling units and amortized over the anticipated period between overhauls, which is generally five years. Related costs are primarily yard costs and the cost of employees directly involved in the work. Amortization costs for periodic overhauls are included in depreciation and amortization expense. Costs for other repair and maintenance activities are included in vessel and rig operating expenses and are expensed as incurred.

Foreign currencies

The Company and the majority of its subsidiaries use the U.S. dollars as their functional currency because the majority of their revenues and expenses are denominated in U.S. dollars. Accordingly, the Company's reporting currency is also U.S. dollars. For subsidiaries that maintain their accounts in currencies other than U.S. dollars, the Company uses the current method of translation whereby the statements of operations are translated using the average exchange rate for the year and the assets and liabilities are translated using the year end exchange rate. Foreign currency translation gains or losses on consolidation are recorded as a separate component of other comprehensive income in shareholders' equity.

Transactions in foreign currencies are translated into U.S. dollars at the rates of exchange in effect at the date of the transaction. Foreign currency assets and liabilities are translated using rates of exchange at the balance sheet date. Gains and losses on foreign currency transactions are included in the consolidated statements of operations.

Current and non-current classification

Current and non-current classification

Receivables and liabilities are classified as current assets and liabilities respectively, if their maturity is within one year of the balance sheet date. Otherwise, they are classified as non-current assets and liabilities.

Cash and cash equivalents

Cash and cash equivalents

Cash and cash equivalents consist of cash, bank deposits and highly liquid financial instruments with original maturities of three months or less.

Restricted cash

Restricted cash

Restricted cash consists of bank deposits which have been pledged as collateral for certain guarantees issued by a bank or minimum deposits which must be maintained in accordance with contractual arrangements. Restricted cash with maturity longer than one year are classified as non-current assets.

Marketable securities

Marketable securities

Marketable equity securities held by the Company are considered to be available-for-sale and, as such, are recorded at fair value with resulting unrealized gains and losses recorded as a separate component of accumulated other comprehensive income in shareholders' equity. The Company also holds marketable securities considered to be trading securities and as such, are recorded at fair value with resulting unrealized gains and losses recorded through the profit and loss statement. Gains and losses on forward contracts to purchase marketable equity securities that do not meet the definition of a derivative are accounted for as available-for-sale.

Receivables

Receivables

Receivables, including accounts receivable, are recorded in the balance sheet at their nominal amount less an allowance for doubtful accounts. The Company establishes reserves for doubtful accounts on a case-by-case basis when it is unlikely that required payments of specific amounts will occur. In establishing these reserves, the Company considers the financial condition of the customer as well as specific circumstances related to the receivable such as customer disputes. Receivable amounts determined as being unrecoverable are written off.

Impairment of marketable securities and equity method investees

Impairment of marketable securities and equity method investees

The Company analyzes its available-for-sale securities and equity method investees for impairment at each reporting period to evaluate whether an event or change in circumstances has occurred in that period that may have a significant adverse effect on the value of the investment. The Company records an impairment charge for other-than-temporary declines in value when the value is not anticipated to recover above cost within reasonably period after the measurement date, unless there are mitigating factors that indicate impairment may not be required. If an impairment charge is recorded, subsequent recoveries in value are not reflected in earnings until sale of the securities held as available for sale or of the equity method investee are sold.

Newbuildings

Newbuildings

The carrying value of rigs under construction ("Newbuildings") represents the accumulated costs at the balance sheet date. Cost components include payments for yard installments and variation orders, construction supervision, equipment, spare parts, capitalized interest, costs related to first time mobilization and commissioning costs. No charge for depreciation is made until commissioning of the newbuilding has been completed and it is ready for its intended use.

The Company may have option agreements with shipyards to order new rigs at fixed or variable prices which require some or no additional payment upon exercise. Payments for rig purchase options are capitalized at the time when option contracts are acquired or entered into. The Company reviews the expected future cash flows, which would result from the exercise of each option contract on a contract by contract basis to determine whether the carrying value of the option is recoverable.

Capitalized interest

Capitalized interest

Interest expenses are capitalized during construction of newbuildings based on accumulated expenditures for the applicable project at the Company's current rate of borrowing. The amount of interest expense capitalized in an accounting period shall be determined by applying an interest rate ("the capitalization rate") to the average amount of accumulated expenditures for the asset during the period. The capitalization rates used in an accounting period shall be based on the rates applicable to borrowings outstanding during the period. The Company does not capitalize amounts beyond the actual interest expense incurred in the period.

If the Company's financing plans associate a specific new borrowing with a qualifying asset, the Company uses the rate on that borrowing as the capitalization rate to be applied to that portion of the average accumulated expenditures for the asset that does not exceed the amount of that borrowing. If average accumulated expenditures for the asset exceed the amounts of specific new borrowings associated with the asset, the capitalization rate to be applied to such excess shall be a weighted average of the rates applicable to other borrowings of the Company.

Drilling units

Drilling units

Rigs, vessels and equipment are recorded at historical cost less accumulated depreciation. The cost of these assets, less estimated residual value is depreciated on a straight-line basis over their estimated remaining economic useful lives. The estimated economic useful life of the Company's floaters, jack-up rigs and tender rigs, when new, is 30 years.

Significant investments are capitalized and depreciated in accordance with the nature of the investment. Significant investments that are deemed to increase an asset's value for its remaining useful life are capitalized and depreciated over the remaining life of the asset.

Assets are classified as held for sale when all of the following criteria are met, which are as follows: Management, having the authority to approve the action, commits to a plan to sell the asset (disposal group), the asset (disposal group) is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such assets (disposal groups), an active program to locate a buyer and other actions required to complete the plan to sell the asset (disposal group) have been initiated, the sale of the asset (disposal group) is probable, and transfer of the asset (disposal group) is expected to qualify for recognition as a completed sale, within one year. The term probable refers to a future sale that is likely to occur, the asset (disposal group) is being actively marketed for sale at a price that is reasonable in relation to its current fair value and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

Cost of property and equipment sold or retired, with the related accumulated depreciation and write-downs are removed from the balance sheet, and resulting gains or losses are included in the consolidated statement of operations.

Equipment

Equipment

Equipment is recorded at historical cost less accumulated depreciation and is depreciated over its estimated remaining useful life, which is between three and five years depending on the type of asset.

Goodwill

Goodwill

The Company allocates the purchase price of acquired businesses to the identifiable tangible and intangible assets and liabilities acquired, with any remaining amount being recorded as goodwill. Goodwill is tested for impairment at least annually at the reporting unit level, which is defined as an operating segment or a component of an operating segment that constitutes a business for which financial information is available and is regularly reviewed by management. The Company has determined that its reporting units are the same as its operating segments for the purpose of allocating goodwill and the subsequent testing of goodwill for impairment.

The Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two step goodwill impairment test.

If the qualitative factors indicate possible impairment, the standard requires the Company to compare the fair value of its reporting units to their carrying value. In the event that the fair value is less than carrying value, the Company must perform an exercise similar to a purchase price allocation in a business combination in order to determine the amount of the impairment charge.

The goodwill impairment test for a reporting unit is based on discounted cash flows. The Company uses estimated future cash flows applying contract dayrates during the firm contract periods and estimated forecasted dayrates for the periods after expiry of firm contract periods. Zero escalation of dayrates for the periods will be assumed. The estimated future cash flows will be based on remaining economic useful lives for the assets, and discounted using a weighted average cost of capital (WACC).

Other intangible assets

Other intangible assets

Other intangible assets are recorded at historical cost less accumulated amortization. The cost of these assets less estimated residual value is amortized on a straight-line basis over the estimated remaining economic useful lives. Other intangible assets include technology and customer relationships.

Impairment of long-lived assets

Impairment of long-lived assets

The carrying value of long-lived assets that are held and used by the Company are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may no longer be appropriate. The Company assesses recoverability of the carrying value of the asset by estimating the undiscounted future net cash flows expected to result from the asset, including eventual disposition. If the undiscounted future net cash flows are less than the carrying value of the asset, an impairment is made to the market value or the discounted future net cash flows.

Defined benefit pension plans

Defined benefit pension plans

The Company has several defined benefit plans which provide retirement, death and early termination benefits. The Company's net obligation is calculated separately for each plan by estimating the amount of the future benefit that employees have earned in return for their cumulative service.

The aggregated projected future benefit obligation is discounted to a present value, and the aggregated fair value of any plan assets is deducted. The discount rate is the market yield at the balance sheet date on government bonds in the relevant currency and based on terms consistent with the post-employment benefit obligations. The retirement benefits are generally a function of number of years of employment and amount of employees' remuneration. The plans are primarily funded through payments to insurance companies. The Company records its pension costs in the period during which the services are rendered by the employees. Actuarial gains and losses are recognized in the statement of operations when the net cumulative unrecognized actuarial gains or losses for each individual plan at the end of the previous reporting year exceed 10 percent of the higher of the present value of the defined benefit obligation and the fair value of plan assets at that date. These gains and losses are recognized over the expected remaining working lives of the employees participating in the plans. Otherwise, recognition of actuarial gains and losses is included in other comprehensive income. Those amounts will be subsequently recognized as a component of net periodic pension cost on the same basis as the amounts recognized in accumulated other comprehensive income.

Treasury shares

Treasury shares

Treasury shares are recognized at cost as a component of equity. The purchase of treasury shares reduces the Company's share capital by the nominal value of the acquired treasury shares. The amount paid in excess of the nominal value is treated as a reduction of additional paid-in capital.

Derivative Financial Instruments and Hedging Activities

Derivative Financial Instruments and Hedging Activities

The Company's interest-rate swap agreements, foreign currency options and forward exchange contracts are recorded at fair value. Changes in the fair value of interest-rate swap agreements, forward exchange and currency options contracts, which have not been designated as hedging instruments, are recorded as a gain or loss as a separate line item within Financial Items.

Changes in the fair value of any derivative instrument that we have formally designated as a hedge, are recognized in Accumulated other comprehensive income (loss) in the Consolidated Balance Sheets. Any change in fair value relating to an ineffective portion of a designated hedge is recognized, in the Consolidated Statement of Operations. When the hedged item affects the income statement, the gain or loss included in accumulated other comprehensive income is reported on the same line in the Consolidated Statements of Operations as the hedged item.

Financial instruments such as forward contracts to purchase shares that do not qualify as derivative instruments are not recognized on the balance sheet, unless deemed impaired. Such instruments are off-balance sheet transactions and result in only disclosures to the financial statements.

Income taxes

Income taxes

Seadrill is a Bermuda company. Currently, Seadrill is not required to pay taxes in Bermuda on ordinary income or capital gains as we qualify as an exempt company. The Company has received written assurance from the Minister of Finance in Bermuda that it will be exempt from taxation until March 2035. Certain subsidiaries operate in other jurisdictions where taxes are imposed. Consequently income taxes have been recorded in these jurisdictions when appropriate.

Significant judgment is involved in determining the provision for income taxes. There are certain transactions for which the ultimate tax determination is unclear due to uncertainty in the ordinary course of business. Seadrill recognizes tax liabilities based on its assessment of whether its tax positions are more likely than not sustainable, based on the technical merits and considerations of the relevant taxing authority's widely understood administrative practices and precedence.

Income tax expense consists of taxes currently payable and changes in deferred tax assets and liabilities calculated according to local tax rules. Deferred tax assets and liabilities are based on temporary differences that arise between carrying values used for financial reporting purposes and amounts used for taxation purposes of assets and liabilities and the future tax benefits of tax loss carry forwards. A deferred tax asset is recognized only to the extent that it is more likely than not that future taxable profits will be available against which the asset can be utilized. The amount of deferred tax provided is based upon the expected manner of settlement of the carrying amount of assets and liabilities, using tax rates enacted at the balance sheet date. The impact of tax law changes is recognized in periods when the change is enacted.

Deferred charges

Deferred charges

Loan related costs, including debt arrangement fees, are capitalized and amortized over the term of the related loan and are included in interest expense.

Convertible debt

Convertible debt

Convertible bond loans issued by the Company include both a loan component (host contract) and an option to convert the loan to shares (embedded derivative).

An embedded derivative, such as a conversion option, may be separated from its host contract and accounted for separately if certain criteria are met (including if the contract that embodies both the embedded derivative and the host contract is not measured at fair value, the economic characteristics and risks of the embedded derivative instrument are not clearly and closely related to the economic characteristics and risks of the host contract and if a separate instrument with the same terms as the embedded instrument would be a derivative).

If an embedded derivative instrument is separated from its host contract, the host contract shall be accounted for based on generally accepted accounting principles applicable to instruments of that type which do not contain embedded derivative instruments.

Total Return Equity Swaps

Total Return Equity Swaps

From time to time, the Company enters into total return equity swaps ("TRS") indexed to the Company's own shares, where the counterparty acquires shares in the Company and the Company carries the risk of fluctuations in the share price of the acquired shares. The fair value of each TRS is recorded as an asset or liability, with the changes in fair value recorded in the consolidated statement of operations. The Company may, from time to time, enter into TRS arrangements indexed to shares in other companies which are accounted for in a similar manner.

Share-based compensation

Share-based compensation

The Company has established an employee share ownership plan under which employees, directors and officers of the Group may be allocated options to subscribe for new shares in the ultimate parent, Seadrill Limited. The compensation cost for share options is recognized as an expense over the service period based on the fair value of the options granted.

The fair value of the share options issued under the Company's employee share option plans is determined at grant date taking into account the terms and conditions upon which the options are granted, and using a valuation technique that is consistent with generally accepted valuation methodologies for pricing financial instruments, and that incorporates all factors and assumptions that knowledgeable, willing market participants would consider in determining fair value. The fair value of the share options is recognized as personnel expenses with a corresponding increase in equity over the period during which the employees become unconditionally entitled to the options. Compensation cost is initially recognized based upon options expected to vest with appropriate adjustments to reflect actual forfeitures. National insurance contributions arising from such incentive programs are expensed when the options are exercised.

Provisions

Provisions

A provision is recognized in the balance sheet when the Company has a present legal or constructive obligation as a result of a past event, and it is probable that an outflow of economic benefits will be required to settle the obligation and a reliable estimate of the amount can be made. If the effect is material, provisions are determined by discounting the expected future cash flows at a pre-tax rate that reflects current market assessments of the time value of money and, where appropriate, the risks specific to the liability.

Segment reporting

Segment reporting

We have in 2011 and 2012 significantly expanded our fleet of drilling rigs through acquisitions of new rigs and newbuilding orders. In response to this development we reviewed our internal reporting structure including the operating and reporting business segments in 2011. The review resulted in a change in our reporting segments with effect from January 1, 2011.

As of December 31, 2012, the Company has three reportable business segments which include floaters, jack-up rigs and tender rigs. The well services business segment included the activities of Archer which performs various services related to platform drilling, drilling facility engineering, well intervention and oilfield services. With effect from the end of February 2011, Archer has been deconsolidated and the well services segment is no longer part of our consolidated financial statements.

Related parties

Related parties

Parties are related if one party has the ability, directly or indirectly, to control the other party or exercise significant influence over the other party in making financial and operating decisions. Parties are also related if they are subject to common control or common significant influence. All transactions between the related parties are based on the principle of arm's length.

Earnings per share

Earnings per share

Basic earnings per share ("EPS") is calculated based on the income (loss) for the period available to common stockholders divided by the weighted average number of shares outstanding for basic EPS for the period. Diluted EPS includes the effect of the assumed conversion of potentially dilutive instruments which for the Company includes share options and convertible debt. The determination of dilutive earnings per share requires the Company to potentially make certain adjustments to net income and for the weighted average shares outstanding used to compute basic earnings per share unless anti-dilutive.

Reclassifications

Reclassifications

Certain reclassifications have been made to prior period amounts to conform to the current year presentation. These reclassifications did not have a material effect on the consolidated financial statements (refer to the Basis of preparation stated above).

Recently Issued Accounting Standards effective 2013

Recently Issued Accounting Standards

Balance sheet—Effective January 1, 2013, we will adopt the accounting standards update that expands the disclosure requirements for the offsetting of assets and liabilities related to certain financial instruments and derivative instruments. The update requires disclosures to present both gross information and net information for financial instruments and derivative instruments that are eligible for net presentation due to a right of offset, an enforceable master netting arrangement or similar agreement. The update is effective for interim and annual periods beginning on or after January 1, 2013. We do not expect that our adoption will have a material effect on our consolidated balance sheet.

Balance sheet—Effective January 1, 2013, we will adopt the accounting standards update that requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. generally accepted accounting principles (GAAP) to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. For public entities, the amendments are effective prospectively for reporting periods beginning after December 15, 2012. We do not expect that our adoption will have a material effect on our financial statements.

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Other current liabilities

12 Months Ended

Dec. 31, 2012

Other current liabilities [Abstract]

Other current liabilities

Note 23 – Other current liabilities

Other current liabilities are comprised of the following:

(In US$ millions)	December 31, 2012		December 31, 2011
Taxes payable		322		309
Employee withheld taxes, social security and vacation payment		83		95
Accrued interest expense		54		30
Liabilities relating to investment in shares (1)		5		-
Deferred mobilization revenues – short-term portion		96		115
Derivative financial instruments (2)		397		414
Accrued expenses		341		279
Other current liabilities		40		72
Total other current liabilities		1,338		1,314

(1) Liabilities relating to the Company's share forward contracts are recorded as short-term debt.

(2) Derivative financial instruments consist of unrealized losses on various types of derivatives.

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Other non-current liabilities

12 Months Ended

Dec. 31, 2012

Other non-current liabilities [Abstract]

Other non-current liabilities

Note 24 – Other non-current liabilities

Other non-current liabilities are comprised of the following:

(In US$ millions)	December 31, 2012		December 31, 2011
Accrued pension liabilities		55		43
Deferred mobilization revenues – long-term portion		225		130
Other non-current liabilities		8		15
Total other non-current liabilities		288		188

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General information

12 Months Ended

Dec. 31, 2012

General information [Abstract]

General information

Note 1- General information

Seadrill Limited ("Seadrill" or the "Company") was incorporated in Bermuda in May 2005, and is a listed company on the Oslo Stock Exchange and the New York Stock Exchange. Seadrill, through a number of acquisitions of other companies and contracts for newbuildings, has developed into one of the largest international offshore drilling contractors, providing services within drilling and well services. As of December 31, 2012 the Company owned a versatile fleet consisting of drillships, jack-up rigs, semi-submersible rigs and tender rigs for operations in shallow and deepwater areas, as well as benign and harsh environments, totaling 43 offshore drilling units, plus an additional 23 units under construction.

In addition to owning and operating offshore floaters, jack-up rigs and tender rigs up until February 2011, we provided platform drilling, well intervention and engineering services through the separately Oslo Stock Exchange listed company named Archer Ltd, ("Archer"), a Bermuda company in which we own 39.9% at the end of December 2012. Archer is accounted for as an investment in an associated company.

As used herein, and unless otherwise required by the context, the term "Seadrill" refers to Seadrill Limited and the terms "Company", "we", "Group", "our" and words of similar import refer to Seadrill and its consolidated companies. The use herein of such terms as group, organization, we, us, our and its, or references to specific entities, is not intended to be a precise description of corporate relationships.

Basis of presentation

The financial statements are presented in accordance with generally accepted accounting principles in the United States of America (US GAAP). The amounts are presented in United States dollar (U.S. dollar) rounded to the nearest million, unless otherwise stated.

The accompanying consolidated financial statements present the financial position of Seadrill Limited, the consolidated subsidiaries and the group's interest in associated entities. Investments in companies in which the Company directly or indirectly holds more than 50% of the voting control are consolidated in the financial statements, as well as certain variable interest entities of which the Company is deemed to be the primary beneficiary.

We have in 2012 and 2011 significantly expanded our fleet of drilling rigs and as a result of this our long term maintenance has increased correspondingly. In response to this, we determined that we had incorrectly classified payments related to long term maintenance as an investing activity rather than as an operating activity in the consolidated statement of cash flows. We concluded that such classification was not material to cash flows from operating activities and investing activities for previously reported periods. Accordingly, the presentation of the consolidated statement of cash flows for the years ending December 31, 2011 and 2010 have been revised. This resulted in a decrease in cash provided by Operating Activities and an increase in cash used by Investing Activities, of $147 million in 2011 and $90 million in 2010.

The accounting policies set out below have been applied consistently to all periods in these consolidated financial statements, unless otherwise noted.

Basis of consolidation

The consolidated financial statements include the assets and liabilities of the Company and its subsidiaries and certain variable interest entities, ("VIE"s) in which the Company is deemed to be the primary beneficiary. All intercompany balances and transactions have been eliminated on consolidation.

A variable interest entity is defined in ASC Topic 810 "Consolidation" ("ASC 810") as a legal entity where either (a) the total equity at risk is not sufficient to permit the entity to finance its activities without additional subordinated support; (b) equity interest holders as a group lack either i) the power to direct the activities of the entity that most significantly impact on its economic success, ii) the obligation to absorb the expected losses of the entity, or iii) the right to receive the expected residual returns of the entity; or (c) the voting rights of some investors in the entity are not proportional to their economic interests and the activities of the entity involve or are conducted on behalf of an investor with a disproportionately small voting interest.

ASC 810 requires a variable interest entity to be consolidated by its primary beneficiary, being the interest holder, if any, which has both (1) the power to direct the activities of the entity which most significantly impact on the entity's economic performance, and (2) the right to receive benefits or the obligation to absorb losses from the entity which could potentially be significant to the entity.

We evaluate our subsidiaries, and any other entities in which we hold a variable interest, in order to determine whether we are the primary beneficiary of the entity, and where it is determined that we are the primary beneficiary we fully consolidate the entity.

Investment in companies in which we hold an ownership interest of between 20% and 50%, and over which we exercise significant influence, but do not consolidate, are accounted for using the equity method. The Company records its investments in associated companies and its share of earnings or losses in the consolidated statements of operations as "Share in results from associated companies." The excess, if any, of purchase price over book value of the Company's investments in equity method investees is included in the accompanying consolidated balance sheets in "Investment in associated companies."

Investments in companies in which our ownership is less than 20% are valued at fair value unless it is not possible to estimate fair value, then the cost method is used.

Intercompany transactions and internal sales have been eliminated on consolidation. Unrealized gains and losses arising from transactions with associates are eliminated to the extent of the Company's interest in the entity.

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Business Acquisitions

12 Months Ended

Dec. 31, 2012

Business Acquisitions [Abstract]

Business Acquisitions

Note 25 – Business Acquisitions

Acquisitions in 2012

There have been no business acquisitions in the year ended December 31, 2012.

Acquisitions in 2011

In January 2011, our then subsidiary Archer acquired Universal Wireline for $26 million on a debt and cash free basis, however Universal Wireline was deconsolidated together with Archer in February 2011. There were no other business acquisitions in the year ended December 31, 2011.

Acquisitions in 2010

Scorpion Offshore Ltd ("Scorpion")

Scorpion was established and incorporated in Bermuda with the purpose of operating a fleet of offshore drilling rigs and is listed on the Oslo Stock Exchange. Seadrill acquired its first shares in Scorpion and entered into forward contracts for the purchase of Scorpion shares in early 2008. In April 2010, Seadrill increased its ownership to 40.0 percent at a price per Scorpion share of NOK36.00. At that time Scorpion had a fleet of seven premium jack-up rigs with operations in South America, Middle East and South East Asia. In late May 2010, Seadrill increased its ownership to 50.1 percent of the outstanding shares and simultaneously announced a bid of NOK40.50 per share for the remaining outstanding shares that was launched on June 4, 2010. On July 19, 2010, it was announced that the holders of 48.7 percent of the total number of outstanding shares had accepted the offer increasing our ownership to 98.8 percent of the outstanding shares and votes in Scorpion. On September 20, 2010, Seadrill informed remaining Scorpion shareholders of its intention to exercise its right under Bermuda company law to compulsory acquire all remaining outstanding shares in Scorpion. The compulsory acquisition was completed on October 25, 2010 and the company's shares were delisted from the Oslo Stock Exchange on November 17, 2010.

Seadrill has applied the purchase method in this business combination. As part of the process, a valuation analysis has been performed to determine the fair values of identifiable assets and liabilities of Scorpion as of the acquisition date. The determination of the value of these components required the Company to make various estimates and assumptions. Critical estimates in valuing certain of the intangible assets include but are not limited to the net present value of future expected cash flows from operations.

The allocation of the purchase price of Scorpion was based upon fair value studies.

Acquisition consideration was as follows:

(In US$ millions)
Cash	57
Fair Value of previously held 40% equity interest	226
Fair Value of Non Controlling Interests	282
Total acquisition consideration	565

On May 28, 2010 the Company acquired control of Scorpion, and re-measured the previously held 40.0% equity interest to its fair value. The difference between the $115 million book value and the $226 million fair value of the previously held 40.0% interest was recorded as a gain on a separate line item under financial items in the consolidated statement of operations in the year ended December 31, 2010.

As a result of the acquisition of control, we also recognized a gain on a bargain purchase as the cost of acquisition is less than the fair value of the net assets of the subsidiary acquired. We subsequently performed a reassessment of the values of all assets acquired, liabilities assumed, and consideration transferred. The reassessment confirmed our initial gain on bargain purchase.

During the third and fourth quarter of 2010, the Company acquired the remaining shares in Scorpion for a total amount of $292 million, increasing the Company's ownership in Scorpion to 100% of the outstanding shares as of December 31, 2010. With effect from June 1, 2010, the results of Scorpion's operations were included in our consolidated financial statements.

Gray Wireline Service, Inc

In December 2010, Archer, acquired Gray Wireline Service, Inc. ("Gray"), an independent cased hole wireline company in the U.S. The purchase price was US$ 161 million.

Rig Inspection Services Limited

In August 2010, Archer acquired Rig Inspection Services Limited ("RIS"), a private company with offices in Singapore and Australia. The purchase price was US$ 9 million.

The purchase price of the acquired companies has been allocated as follows:

(In US$ millions)	Scorpion		Gray		RIS		Total
Assets:
Intangible assets		-		36		2		38
Goodwill		-		80		5		85
Fixed assets		1,234		44		-		1,278
Receivables and other current assets		210		33		3		246
Total assets		1,444		193		10		1,647
Liabilities:
Deferred tax		-		25		-		26
Payables and other current liabilities		823		8		1		831
Total liabilities		823		33		1		857
Purchase Price		565		161		9		735
Gain on bargain purchase		56		-		-		56

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Impairment loss on marketable securities and investments in associated companies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Share in results from associated companies (loss)/gain	$ (220)	$ (420)	$ 48
Impairment loss on investments	0	10	15
Archer [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Current fair value of investment	121	393
Share in results from associated companies (loss)/gain	221	463
Seahawk [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Impairment loss on investments		$ 10	$ 15

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Variable Interest Entities (VIEs)

12 Months Ended

Dec. 31, 2012

Variable Interest Entities (VIEs) [Abstract]

Variable Interest Entities (VIEs)

Note 33 – Variable Interest Entities (VIEs)

As of December 31, 2012, the Company leased a drillship and two semi-submersible rigs from VIEs under finance leases. Each of the units had been sold by the Company to single purpose subsidiaries of Ship Finance Ltd and simultaneously leased back by the Company on bareboat charter contracts for a term of 15 years. The Company has several options to repurchase the units during the charter periods, and obligations to purchase the assets at the end of the 15 year lease period. The following table gives a summary of the sale and leaseback arrangements, as of December 31, 2012:

Unit	Effective from	Sale value (In US$ millions)		First repurchase option (In US$ millions)		Month of first repurchase option	Last repurchase option * (In US$ millions)		Month of last repurchase Option *
West Polaris	Jul 2008		850		548	September 2012		178	Jun 2023
West Taurus	Nov 2008		850		418	February 2015		149	Nov 2023
West Hercules	Oct 2008		850		580	August 2011		135	Aug 2023

* For the unit West Polaris, Ship Finance has a put option exercisable at the end of the lease terms by which the vessel may be sold to Seadrill for a fixed price of $75 million. For West Taurus and West Hercules repurchase obligations at the end of the lease terms have been agreed, at $149 million and $135 million, respectively.

The Company has determined that the Ship Finance subsidiaries, which own the units, are variable interest entities (VIEs), and that the Company is the primary beneficiary of the risks and rewards connected with the ownership of the units and the charter contracts. Accordingly, these VIEs are fully consolidated in the Company's consolidated accounts. The Company did not record any gains from the sale of the units, as they continued to be reported as assets at their original cost in the Company's balance sheet at the time of each transaction. The equity attributable to Ship Finance in the VIEs is included in non-controlling interests in the Company's consolidated accounts. At December 31, 2012 the units are reported under drilling units in the Company's balance sheet.

The bareboat charter rates are set on the basis of a Base LIBOR Interest Rate for each bareboat charter contract, and thereafter are adjusted for differences between the LIBOR fixing each month and the Base LIBOR Interest Rate for each contract. A summary of the bareboat charter rates per day for each unit is given below. The amounts shown are based on the Base LIBOR Interest Rate, and reflect average rates for the year.

				2013		2014		2015		2016		2017
	Base LIBOR Interest Rate			(In US$ thousands)		(In US$ thousands)		(In US$ thousands)		(In US$ thousands)		(In US$ thousands)
West Polaris		2.85	%		223.3		176.5		175.4		170.0		170.0
West Taurus		4.25	%		316.2*		320.7		165.0		158.8		157.5
West Hercules		4.25	%		250.0		238.5		180.0		172.5		170.0

* For a period the interest rates West Taurus have been fixed at 2.17% regardless of movements in LIBOR interest rates. The fixed charter rate is reflected in the above table.

The assets and liabilities in the statutory accounts of the VIEs as at December 31, 2012 and as at December 31, 2011 are as follows:

(In US$ millions)	December 31, 2012				December 31, 2011
	SFL		SFL		SFL		SFL
	West		Deepwater		West		Deepwater
	Polaris		Ltd.		Polaris		Ltd.
	Limited				Limited
Name of unit	West		West		West		West
	Polaris		Taurus		Polaris		Taurus
			and West				and West
			Hercules				Hercules
Investment in finance lease		534		1,120		611		1,240
Other assets		7		20		12		23
Total assets		541		1,140		623		1,263
Long term debt		360		-		398		822
Other liabilities		107		989		174		326
Total liabilities		467		989		572		1,148
Equity		74		151		51		115
Book value of units in the Company's consolidated accounts		594		1,035		614		1,021

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Restricted cash (Tables)

12 Months Ended

Dec. 31, 2012

Restricted cash [Abstract]

Restricted cash

Restricted cash includes:

(In US$ millions)	December 31, 2012		December 31, 2011
CIRR deposits (see Note below)		270		298
Margin calls related to share forward agreements		69		137
Restricted deposit related to loan facility		5		5
Tax withholding deposits		58		42
Total restricted cash		402		482
Long-term restricted cash (related to CIRR deposits and loan facility)		218		250
Short-term restricted cash		184		232

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Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and contingencies [Abstract]

Maturity schedule for contractual commitments

The maturity schedule for the contractual commitments as of December 31, 2012 is as follows:

(In US$ millions)	2013		2014		2015		2016		2017		2018 and thereafter
Newbuildings		2,711		1,834		1,059		-		-		-
Total		2,711		1,834		1,059		-		-		-

Maximum potential future payment for each type of guarantee

Guarantees

The Company has issued guarantees in favor of third parties as follows, which is the maximum potential future payment for each type of guarantee:

(In US$ millions)	December 31, 2012		December 31, 2011
Guarantees to customers of the Company's own performance		2,455		1,553
Guarantee in favor of banks		905		764
Guarantee in favor of suppliers		5,522		2,023
Guarantee in favor of Variable Interest Entities		1,655		1,949
Total		10,536		6,289

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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating revenues
Contract revenues	$ 4,295	$ 4,095	$ 3,823
Reimbursables	180	96	192
Other revenues	3	1	26
Total operating revenues	4,478	4,192	4,041
Gain on sale of assets	0	22	26
Operating expenses
Vessel and rig operating expenses	1,656	1,585	1,605
Reimbursable expenses	166	90	179
Depreciation and amortization	615	563	480
General and administrative expenses	250	202	178
Total operating expenses	2,687	2,440	2,442
Net operating income	1,791	1,774	1,625
Financial items
Interest income	25	21	42
Interest expense	(340)	(295)	(312)
Share in results from associated companies (loss)/gain	(220)	(420)	48
Impairment loss on marketable securities	0	(10)	(15)
Gain/ (loss) on derivative financial instruments	3	(346)	(92)
Gain on re-measurement of previously held equity interest	0	0	111
Gain on decline in ownership interest	169
Gain on bargain purchase	0	0	56
Loss on debt extinguishment	0	0	(145)
Foreign exchange (loss)	(70)	(18)	(26)
Gain on loss of control in subsidiary	0	540	0
Gain on realization of marketable securities	85	416	0
Other financial items	(6)	9	39
Total financial items	(354)	(103)	(294)
Income before income taxes	1,437	1,671	1,331
Income taxes	(232)	(189)	(159)
Net income	1,205	1,482	1,172
Net income attributable to the non-controlling interest	97	81	55
Net income attributable to the parent	$ 1,108	$ 1,401	$ 1,117
Basic earnings per share (in US dollars per share)	$ 2.37	$ 3.05	$ 2.73
Diluted earnings per share (in US dollars per share)	$ 2.34	$ 2.96	$ 2.73	[1]
Declared regular dividend per share (in US dollars per share)	$ 2.54	$ 3.06	$ 2.535
Declared extraordinary dividend per share (in US dollars per share)	$ 1.00	$ 0	$ 0.20

[1] The loss on debt extinguishment of $145 million has been added back to net income in addition to interest expenses related to the convertible bonds. These effects are anti-dilutive, and exceed the effect of increased denominator when calculating the diluted earnings per share. As a consequence of this, the diluted earnings per share equal basic earnings per share.

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Segment information (Tables)

12 Months Ended

Dec. 31, 2012

Segment information [Abstract]

Segment results

Segment results are evaluated on the basis of operating revenues, and the information given below is based on information used for internal management reporting. The accounting principles for the segments are the same as for our consolidated financial statements.

Revenues (excluding gain on sale of drilling units)

(In US$ millions)	2012		2011		2010
Floaters		2,859		2,694		2,264
Jack-up rigs		861		776		578
Tender Rigs		758		589		482
Well Services		-		133		717
Total		4,478		4,192		4,041

Depreciation and amortization

(In US$ millions)	2012		2011		2010
Floaters		412		358		301
Jack-up rigs		146		135		99
Tender Rigs		57		63		57
Well Services		-		7		23
Total		615		563		480

Operating Income – net income

(In US$ millions)	2012			2011			2010
Floaters		1,250			1,328			1,140
Jack-up Rigs		225			220			199
Tender Rigs		316			221			222
Well Services		-			5			64
Operating income		1,791			1,774			1,625
Unallocated items:
Total financial items		(354	)		(103	)		(294	)
Income taxes		(232	)		(189	)		(159	)
Net income		1,205			1,482			1,172

Total assets

(In US$ millions)	2012		2011
Floaters		13,725		12,600
Jack-up Rigs		4,210		4,200
Tender Rigs		1,697		1,504
Total		19,632		18,304

Goodwill

(In US$ millions)	2012		2011
Floaters		890		890
Jack-up Rigs		281		281
Tender Rigs		149		149
Total		1,320		1,320

As a consequence of the change in segment structure from 2011, the Goodwill has been reassigned to the reporting units affected using a relative fair value allocation approach.

Total liabilities

(In US$ millions)	2012		2011
Floaters		9,514		8,274
Jack-up Rigs		2,918		2,745
Tender Rigs		1,176		983
Total		13,608		12,002

Capital expenditures – fixed assets

(In US$ millions)	2012		2011		2010
Floaters		1,342		1,805		1,330
Jack-up Rigs		150		495		877
Tender Rigs		198		243		134
Well Services		-		-		27
Total		1,690		2,543		2,368

Company's revenues and fixed assets by geographic area

Geographic segment data

Revenues are attributed to geographical segments based on the country of operations for drilling activities, i.e. the country where the revenues are generated. The following presents the Company's revenues and fixed assets by geographic area:

Revenues (excluding gain on sale of assets)

(In US$ millions)	2012		2011		2010
Norway		815		966		1,393
UK		230		56		151
Brunei		95		54		66
Thailand		310		303		165
Malaysia		226		207		62
Congo		2		-		37
Nigeria		419		235		204
Canada		66		-		-
USA		260		202		186
Brazil		629		913		710
China		183		299		230
Indonesia		92		130		159
Philippines		-		-		109
Vietnam		180		157		150
Angola		358		337		182
Red Sea		-		-		68
Trinidad & Tobago		83		41		-
Ghana		122		-		-
Saudi Arabia/Kuwait		146		127		69
Mexico		137		49		-
Other		125		116		100
Total		4,478		4,192		4,041

Fixed assets – operating drilling units (1)

(In US$ millions)	2012		2011
Norway		1,868		2,007
UK		1,112		-
Brunei		197		38
Thailand		354		605
Malaysia		690		333
Congo		161		-
Nigeria		1,148		1,191
Canada		546		-
USA		1,296		496
Brazil		1,714		2,096
China		-		1,091
Indonesia		99		321
Vietnam		337		336
Angola		945		979
Trinidad & Tobago		252		424
Ghana		655
Saudi Arabia		661		331
Mexico		593		605
Other		267		370
Total		12,894		11,223

(1) The fixed assets referred to in the table are the Company's operating drilling units. Asset locations at the end of a period are not necessarily indicative of the geographic distribution of the revenues or operating profits generated by such assets during such period.

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Other current liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Other current liabilities [Abstract]
Taxes payable	$ 322		$ 309
Employee withheld taxes, social security and vacation payment	83		95
Accrued interest expense	54		30
Liabilities relating to investment in shares	5	[1]	0	[1]
Short term portion of deferred mobilization revenues	96		115
Derivative financial instruments	397	[2]	414	[2]
Accrued expenses	341		279
Other current liabilities	40		72
Total other current liabilities	$ 1,338		$ 1,314

[1] Liabilities relating to the Company's share forward contracts are recorded as short-term debt.

[2] Derivative financial instruments consist of unrealized losses on various types of derivatives.

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities
Net income	$ 1,205	$ 1,482	$ 1,172
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	615	563	480
Amortization of deferred loan charges	30	31	43
Amortization of unfavorable contracts	0	(24)	(39)
Amortization of favorable contracts	12	23	13
Amortization of mobilization revenue	(162)	(96)	(86)
Impairment loss on marketable securities	0	10	15
Share of results from associated companies loss/ (gain)	220	420	(48)
Share-based compensation expense	8	10	11
Gain on disposal of fixed assets	0	(22)	(26)
Gain on decline in ownership interest	(169)	0	0
Unrealized (gain)/loss related to derivative financial instruments	6	261	97
Non cash gain recognized related to realization of marketable securities	(86)	(416)	(43)
Non cash gain recognized related to loss of control	0	(540)	0
Dividend received from associated company	18	57	61
Deferred income tax expense	25	(9)	110
Unrealized foreign exchange loss/ (gain) on long term interest bearing debt	6	(5)	(4)
Non-cash loss recognized on extinguishment of convertible debt	0	0	48
Non-cash gains recognized on acquisition of subsidiaries	0	0	(167)
Payments for long-term maintenance	(133)	(147)	(90)
Changes in operating assets and liabilities, net of effect of acquisitions
Unrecognized mobilization fees received from customers	238	58	109
Trade accounts receivable	(198)	(52)	(163)
Trade accounts payable	34	(35)	(15)
Prepaid expenses/accrued revenue	(64)	79	(107)
Interest bearing note receivable with customers	(76)	0	0
Other, net	61	21	(161)
Net cash provided by operating activities	1,590	1,669	1,210
Cash Flows from Investing Activities
Additions to newbuilding	(1,343)	(2,381)	(2,006)
Additions to rigs and equipment	(214)	(15)	(272)
Sale of rigs and equipment	0	245	55
Settlement of disputes with ship yard	38	0	0
Investment in subsidiaries, net of cash acquired	0	(26)	(152)
Cash deconsolidated upon loss of control in subsidiary	0	(127)	0
Change in margin calls and other restricted cash	102	(43)	51
Investment in associated companies	(153)	(287)	(13)
Proceed from repayment of short term loan to related parties	0	0	90
Disposal of associated companies	65	0	0
Short-term loan granted to related parties	(55)	0	(160)
Purchase of marketable securities	(19)	(13)	(15)
Long term loan granted to related parties	(20)	0	0
Repayment from long term loan granted to related parties	20	0	0
Proceeds from realization of marketable securities	219	161	215
Net cash used in investing activities	(1,360)	(2,486)	(2,207)
Cash Flows from Financing Activities
Proceeds from debt	3,477	5,929	3,902
Repayments of debt	(2,752)	(4,116)	(1,870)
Debt fees paid	(37)	(49)	(33)
Proceeds from debt to related party	1,013	0	0
Repayments of debt to related party	(487)	0	0
Change in current liability related to share forward contracts	0	0	(12)
Paid to non-controlling interests	(50)	(95)	(292)
Contribution from non-controlling interests, net of issuance cost	350	418	289
Purchase of treasury shares	0	(130)	(42)
Proceeds from sale of treasury shares	16	21	23
Dividends paid	(1,925)	(1,440)	(990)
Proceeds from issuance of equity	0	0	318
Net cash provided by/(used in) financing activities	(395)	538	1,293
Effect of exchange rate changes on cash and cash equivalents	0	7	(1)
Net (decrease)/ increase in cash and cash equivalents	(165)	(272)	295
Cash and cash equivalents at beginning of the period	483	755	460
Cash and cash equivalents at the end of period	318	483	755
Supplementary disclosure of cash flow information
Interest paid	260	208	226
Taxes paid	$ 179	$ 188	$ 134

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Other non-current assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other non-current assets [Abstract]
Long-term part of deferred charges	$ 74	$ 65
Deferred tax effect of internal transfer of assets	140	149
Favorable contracts		2
Long term portion of deferred mobilization costs	118
Other	70	18
Total other non-current assets	402	234
Deferred Finance Costs [Abstract]
Debt arrangement fees	241	204
Accumulated amortization	(143)	(113)
Total book value	98	91
Less: Short-term portion	(24)	(26)
Long-term portion	74	65
Amortization for the period	$ 30	$ 31	$ 43

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Goodwill and other intangible assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill and other intangible assets [Abstract]

Goodwill

Goodwill:

(In US$ millions)	December 31, 2012		December 31, 2011
Net book balance at January 1		1,320		1,676
Goodwill acquired during the year		-		-
Impairment losses		-		-
Currency adjustments		-		15
Deconsolidation Archer		-		(371)
Net book balance of December 31		1,320		1,320

Other intangible assets

Other intangible assets:

Other intangible assets relate to customer relationships, technology and trademarks within the operating segment Well Services.

(In US$ millions)	December 31, 2012		December 31, 2011
Net book balance at January 1		-		57
Intangible assets acquired during the year		-		-
Depreciation		-		-
Deconsolidation Archer		-		(57)
Net book balance of December 31		-		-

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Non-controlling interest (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended									24 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Scorpion [Member]	Dec. 31, 2011 Scorpion [Member]	Dec. 31, 2012 Archer [Member]	Dec. 31, 2011 Archer [Member]	Dec. 31, 2012 Ship Finance [Member]	Dec. 31, 2011 Ship Finance [Member]	Dec. 31, 2008 Ship Finance [Member]	Dec. 31, 2012 North Atlantic [Member]	Dec. 31, 2011 North Atlantic [Member]	Dec. 31, 2012 Seadrill Partners LLC [Member]	Dec. 31, 2011 Seadrill Partners LLC [Member]
Noncontrolling Interest [Line Items]
Share capital of North Atlantic owned by the Company (in hundredths)											73.20%		75.70%
Common units representing liability entity's interests (in shares)													10,062,500
Common unit price representing liability entity's interests (in dollars per unit)													$ 22.00
Gross proceeds from completion of IPO													$ 221.4
Expenses related completion of IPO of common units													18.7
Common units issued in connection with an over allotment option (in shares)													1,312,500
Common units owned upon completion of IPO (in shares)													14,752,525
Subordinated units owned upon completion of IPO (in shares)													16,543,350
Number of sale and leaseback arrangements for drilling rigs with Ship Finance										5
Number of Ship Finance companies acquired									1
Acquisition of remaining equity shares of former VIE									47
Changes in non-controlling interest [Roll Forward]
Balance, beginning of period	325	539		0	0	0	326	215	213		110	0	0	0
Changes during period	99	(295)		0	0	0	(320)	20	(46)		10	71	69	0
Net income (loss)	97	81	55	0	0	0	(6)	39	48		48	39	10	0
Balance, end of period	$ 521	$ 325	$ 539	$ 0	$ 0	$ 0	$ 0	$ 274	$ 215		$ 168	$ 110	$ 79	$ 0

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Share option plans

12 Months Ended

Dec. 31, 2012

Share option plans [Abstract]

Share option plans

Note 28 – Share option plans

The fair value of share options granted is recognized as personnel expenses, and in the year ended December 31, 2012, $8 million (2011: $10 million) were expensed in the income statement. These expenses have no effect on income taxes in the financial statements. However if the option is exercised a tax benefit will be recorded, as the gain is recorded as deductible for tax purposes. If the Company has to expense social security taxes related to the benefit of options exercised such expenses will be recorded at the exercise date.

In May 2005, a general meeting of the Company approved authorizing the Board of Directors to establish and maintain an option scheme (the "Seadrill Scheme") for encouraging the holding of shares in the Company. The Seadrill Scheme will expire in May 2016. The Seadrill Scheme permits the board of directors, at its discretion, to grant options to acquire shares in the Company to employees and directors of the Company or its subsidiaries. The options are not transferable. The subscription price is at the discretion of the board of directors, provided the subscription price is never reduced below the par value of the share. The subscription price for certain options granted under the scheme will be reduced by the amount of all dividends declared by the Company in the period from the date of grant until the date the option is exercised. Options granted under the scheme will vest at a date determined by the board at the date of the grant. The options granted under the plan to date vest over a period of one to five years. There is no maximum number of shares authorized for awards of equity share options and authorized, unissued or treasury shares of the Company may be used to satisfy exercised options.

During 2012, 181,012 share options were granted. The assumptions used in estimating fair value are as follows: 0.67% risk-free interest rate, volatility of 24.3%, 0% dividend yield and an expected option term of four years. The risk-free interest rates were estimated using the US Treasury yield curve in effect at the time of grant for instruments with a similar life. The dividend yield has been estimated at 0% as the exercise price is reduced by all dividends declared by the Company from the date of grant to the exercise date. It is also assumed that 100% of options granted will vest.

The following summarizes share option transactions related to the Seadrill Scheme in 2012, 2011 and 2010:

	2012				2011					2010
	Options		Weighted average exercise price US$		Options			Weighted average exercise price US$		Options			Weighted average exercise price US$
Outstanding at beginning of year		5,420,438		26.16		5,512,400			20.30		6,199,833			13.87
Granted		181,012		37.41		1,786,771			34.68		1,910,000			29.94
Exercised		(1,415,000)		16.39		(1,638,165	)		16.33		(2,329,000	)		11.88
Forfeited		(312,559)		30.84		(240,568	)		21.98		(268,433	)		14.99
Outstanding at end of year		3,875,891		29.88		5,420,438			26.16		5,512,400			20.30
Exercisable at end of year		1,164,214		21.19		1,598,412			19.82		1,645,333			16.03

Options granted in 2006 had initial exercise prices between $2.23 and NOK102 ($16.28) per share, could be exercised one third each year beginning 12 months after they were granted, and expired between May 2010 and September 2011. Options granted in 2007 had initial exercise prices between NOK98.63 ($15.23) and NOK129.63 ($22.35) per share, could be exercised one third each year beginning 12 months after they were granted, and expired in September 2011. Options granted in 2008 had been repriced with exercise prices now being NOK 90.83 ($14.09) and NOK104.64 ($16.24) per share; they may be exercised one third each year beginning 12 months after they were granted, and expire in May 2014. These same prices and dates apply to the options granted in 2009. Options granted in April 2010 had exercise price of NOK 137.40 ($23.13), may be exercised one third after 12 or 15 months and expire in March/June 2015. Options granted in November 2010 had exercise prices of NOK 192.90 ($31.4) for American citizens or residents and NOK 185.20 ($31.06) for non-Americans. They may be exercised one fifth each year beginning 12 months after they were granted and expire in December 2015. Options granted in November 2011 had exercise prices of NOK202.10 ($34.68) and can be exercised one fourth at a time, after the first 18, 36, 48 and 60 months from the grant date. They expire in December 2016. During 2012, there were 181,012 options granted in different dates and with different strike prices, ranging from NOK 202,10 to NOK 224,53. They have the same exercise schedule as the 2011's grant and expire between December 2016 and December 2017.

The weighted average grant-date fair value of options granted during 2012 is $7.06 per share (2011: $7.07 per share, 2010: $8.96 per share).

As of December 31, 2012 there was $ 11 million in unrecognized compensation costs relating to non-vested options granted under the Options Schemes (2011: $20 million). This amount will be recognized as expense of $6 million in 2013, $3 million in 2014, $2 million in 2015 and less than a million in 2016 and 2017.

There were 3,875,891 options outstanding at December 31, 2012 (2011: 5,420,438). Their weighted average remaining contractual life was 39 months (2011: 45 months) and their weighted average fair value was $7.75 per option (2011: $11.20 per option). The weighted average parameters used in calculating these weighted average fair values are as follows: risk-free interest rate 2.25 % (2011: 2.72%), volatility 28 % (2011: 31%), dividend yield 0% (2011: 0%), option holder retirement rate 0% (2011: 0%) and expected term 5 years (2011: 5 years).

During 2012 the total intrinsic value of options exercised was $40 million (2011: $32 million, 2010: $22 million) on the day of exercise. The intrinsic value of options fully vested but not exercised at December 31, 2012 was $18 million and their average remaining term was 24 months.

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Business Acquisitions (Tables)

12 Months Ended

Dec. 31, 2012

Business Acquisitions [Abstract]

Acquisition consideration

The allocation of the purchase price of Scorpion was based upon fair value studies.

Acquisition consideration was as follows:

(In US$ millions)
Cash	57
Fair Value of previously held 40% equity interest	226
Fair Value of Non Controlling Interests	282
Total acquisition consideration	565

Purchase price allocation of acquired companies

The purchase price of the acquired companies has been allocated as follows:

(In US$ millions)	Scorpion		Gray		RIS		Total
Assets:
Intangible assets		-		36		2		38
Goodwill		-		80		5		85
Fixed assets		1,234		44		-		1,278
Receivables and other current assets		210		33		3		246
Total assets		1,444		193		10		1,647
Liabilities:
Deferred tax		-		25		-		26
Payables and other current liabilities		823		8		1		831
Total liabilities		823		33		1		857
Purchase Price		565		161		9		735
Gain on bargain purchase		56		-		-		56

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Other current assets

12 Months Ended

Dec. 31, 2012

Other current assets [Abstract]

Other current assets

 Note 15 – Other current assets

Other current assets include:

(In US$ millions)	December 31, 2012		December 31, 2011
Prepaid expenses		89		25
Deferred charges – short term portion		24		26
Accrued revenue		15		-
Unrealized gain on total return swap agreements		7		11
Reimbursable amounts due from customers		49		154
Favorable contracts		2		12
Other		123		95
Total other current assets		309		323

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Pension benefits

12 Months Ended

Dec. 31, 2012

Pension benefits [Abstract]

Pension benefits

Note 29 - Pension benefits

The Company has a defined benefit pension plan covering substantially all Norwegian employees. A significant part of this plan is administered by a life insurance company.

In June 2009 we introduced a defined contribution plan for all new Norwegian employees employed onshore.

Under the new scheme, the Company contributes to the employee's pension plan amounts ranging into five to eight percent of the employee's annual salary. Existing onshore staff were given an option to join the new scheme or continue with their previous defined benefit plan.

For onshore employees in Norway, continuing with the defined benefit plan, the primary benefits are retirement pension of approximately 66 percent of salary at retirement age of 67 years, together with a long-term disability pension. The retirement pension per employee is capped at an annual payment of 66 percent of the total of 12 times the Norwegian Social Security Base. Most employees in this group may choose to retire at 62 years of age on a pre-retirement pension. Offshore employees in Norway have retirement and long-term disability pension of approximately 60 percent of salary at retirement age of 67. Offshore employees on mobile units may choose to retire at 60 years of age on a pre-retirement pension.

On December 31, 2006, Seadrill adopted the recognition and disclosure provisions of ASC Topic 715 Compensation – Retirement Benefits. ASC Topic 715 requires the recognition of the funded status of the Defined Benefit and Postretirement Benefits Other Than Pensions ("OPEB") plans on the December 31, 2006 balance sheet with a corresponding adjustment to accumulated other comprehensive income. The adjustment to accumulated other comprehensive income at adoption represents the net unrecognized actuarial losses, unrecognized prior service costs, and unrecognized transition obligation remaining from the initial application of ASC Topic 715, all of which were previously netted against the plans' funded status on the balance sheet. These amounts will be subsequently recognized as net periodic pension cost pursuant to our historical accounting policy for amortizing such amounts. Further, actuarial gains and losses that arise in subsequent periods and are not recognized as net periodic pension cost in the same periods will be recognized as a component of other comprehensive income. Those amounts will be subsequently recognized as a component of net periodic pension cost on the same basis as the amounts recognized in accumulated other comprehensive income.

Consolidated balance sheet position

(In US$ millions)	2012			2011
Non-current liabilities		50			15
Deferred tax		(14	)		(4	)
Shareholders equity		(36	)		(11	)

Annual pension cost

(In US$ millions)	2012			2011			2010
Benefits earned during the year		12			9			18
Interest cost on prior years' benefit obligation		5			5			9
Gross pension cost for the year		17			14			27
Expected return on plan assets		(5	)		(5	)		(8	)
Administration charges		-			-			1
Net pension cost for the year		12			9			20
Social security cost		2			1			3
Amortization of actuarial gains/losses		-			-			(1	)
Amortization of net transition assets		(4	)		-			3
Total net pension cost		10			10			19

The funded status of the defined benefit plan

(In US$ millions)	December 31, 2012			December 31, 2011
Projected benefit obligations		171			128
Plan assets at market value		(122	)		(91	)
Accrued pension liability exclusive social security		49			37
Social security related to pension obligations		6			6
Accrued pension liabilities		55			43

Change in benefit obligations

(In US$ millions)	2012			2011
Benefit obligations at beginning of year		128			215
Deconsolidation of Archer		-			(104	)
Interest cost		5			5
Current service cost		12			9
Benefits paid		(2	)		(2	)
Change in unrecognized actuarial gain		22			8
Foreign currency translations		11			(4	)
Acquisition/transfer members		(5	)		-
Benefit obligations at end of year		171			128

Change in pension plan assets

(In US$ millions)	2012			2011
Fair value of plan assets at beginning of year		91			150
Deconsolidation of Archer		-			(60	)
Estimated return		5			5
Contribution by employer		28			7
Administration charges		-			-
Benefits paid		(2	)		(1	)
Change in unrecognized actuarial loss		(6	)		(8	)
Foreign currency translations		8			(2	)
Acquisition/transfer members		(2	)		-
Fair value of plan assets at end of year		122			91

Pension obligations are actuarially determined and are critically affected by the assumptions used, including the expected return on plan assets, discount rates, compensation increases and employee turnover rates. The Company periodically reviews the assumptions used, and adjusts them and the recorded liabilities as necessary.

The expected rate of return on plan assets and the discount rate applied to projected benefits are particularly important factors in calculating the Company's pension expense and liabilities. The Company evaluates assumptions regarding the estimated rate of return on plan assets based on historical experience and future expectations on investment returns, utilizing the asset allocation classes held by the plan's portfolios. The discount rate is based on the Norwegian government 10 year-bond effective yield. Changes in these and other assumptions used in the actuarial computations could impact the projected benefit obligations, pension liabilities, pension expense and other comprehensive income.

Assumptions used in calculation of pension obligations	2012			2011			2010
Rate of compensation increase at the end of year		3.50	%		4.00	%		4.00	%
Discount rate at the end of year		4.20	%		3.90	%		4.20	%
Prescribed pension index factor		1.40	%		1.10	%		2.00	%
Expected return on plan assets for the year		4.00	%		4.80	%		4.60	%
Employee turnover		3.50	%		4.00	%		4.00	%
Expected increases in Social Security Base		3.25	%		3.75	%		3.75	%
Expected annual early retirement from age 60/62:
Offshore personnel fixed installations								30.0	%
Offshore personnel and onshore employees					50.0	%		50.0	%

The weighted-average asset allocation of funds related to the Company's defined benefit plan at December 31, was as follows:

Pension benefit plan assets	2012			2011
Equity securities		9.2	%		10.4	%
Debt securities		52.4	%		48.6	%
Real estate		18.3	%		18.0	%
Money market		18.3	%		21.7	%
Other		1.9	%		1.20	%
Total		100.0	%		100.0	%

The investment policies and strategies for the pension benefit plan funds do not use target allocations for the individual asset categories. The investment objectives are to maximize returns subject to specific risk management policies. The Company diversifies its allocation of plan assets by investing in both domestic and international fixed income securities and domestic and international equity securities. These investments are readily marketable and can be sold to fund benefit payment obligations as they become payable..

Cash flows - Contributions expected to be paid

The table below shows the Company's expected annual pension plan contributions under defined benefit plans for the years 2013-2022. The expected payments are based on the assumptions used to measure the Company's obligations at December 31, 2012 and include estimated future employee services.

(In US$ millions)	December 31 2012
2013		28
2014		27
2015		29
2016		30
2017		32
2018-2022		183
Total payments expected during the next 10 years		329

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Business Acquisitions (Details) In Millions, except Per Share data, unless otherwise specified	12 Months Ended				6 Months Ended	12 Months Ended					12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Jan. 31, 2011 USD ($)	Dec. 31, 2010 Scorpion [Member] USD ($)	Dec. 31, 2010 Scorpion [Member] USD ($)	Jul. 19, 2010 Scorpion [Member]	Jun. 04, 2010 Scorpion [Member] NOK	May 28, 2010 Scorpion [Member] USD ($)	Apr. 30, 2010 Scorpion [Member] NOK	Dec. 31, 2010 Gray [Member] USD ($)	Dec. 31, 2010 RIS [Member] USD ($)	Aug. 31, 2010 RIS [Member] USD ($)
Business Acquisitions [Abstract]
Purchase price of Universal Wireline				$ 26
Business Acquisition [Line Items]
Equity interest acquired (in hundredths)					100.00%	100.00%	98.80%		50.10%	40.00%
Share price (in NOK per share)										36.00
Number of premium jack up rigs operated by Scorpion										7
Bid price for remaining outstanding shares (in NOK per share)								40.50
Percentage of ownership who accepted the offer of stock purchase (in hundredths)							48.70%
Acquisition consideration [Abstract]
Cash					57	57
Fair Value of previously held 40% equity interest					226	226
Fair Value of Non Controlling Interests					282	282
Total acquisition consideration					565	565
Percentage of previously held equity interest to its fair value (in hundredths)									40.00%
Book value of the previously held 40% equity interest									115
Acquisition of remaining shares in acquiree					292
Purchase price of acquired entity			735		565	565					161	9	9
Assets [Abstract]
Intangible assets			38		0	0					36	2
Goodwill			85		0	0					80	5
Fixed assets			1,278		1,234	1,234					44	0
Receivables and other current assets			246		210	210					33	3
Total assets			1,647		1,444	1,444					193	10
Liabilities [Abstract]
Deferred tax			26		0	0					25	0
Payables and other current liabilities			831		823	823					8	1
Total liabilities			857		823	823					33	1
Purchase Price			735		565	565					161	9	9
Gain on bargain purchase	$ 0	$ 0	$ 56			$ 56					$ 0	$ 0

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Newbuildings

12 Months Ended

Dec. 31, 2012

Newbuildings [Abstract]

Newbuildings

Note 17 – Newbuildings

(In US$ millions)	December 31, 2012		December 31, 2011
Opening balance		2,531		1,247
Additions		1,267		2,308
Capitalized interest and loan related costs		76		73
Re-classified as Drilling Units		(1,992)		(1,097	)
Closing balance		1,882		2,531

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Share option plans (Tables)

12 Months Ended

Dec. 31, 2012

Share option plans [Abstract]

Share option transactions related to the Seadrill Scheme

The following summarizes share option transactions related to the Seadrill Scheme in 2012, 2011 and 2010:

	2012				2011					2010
	Options		Weighted average exercise price US$		Options			Weighted average exercise price US$		Options			Weighted average exercise price US$
Outstanding at beginning of year		5,420,438		26.16		5,512,400			20.30		6,199,833			13.87
Granted		181,012		37.41		1,786,771			34.68		1,910,000			29.94
Exercised		(1,415,000)		16.39		(1,638,165	)		16.33		(2,329,000	)		11.88
Forfeited		(312,559)		30.84		(240,568	)		21.98		(268,433	)		14.99
Outstanding at end of year		3,875,891		29.88		5,420,438			26.16		5,512,400			20.30
Exercisable at end of year		1,164,214		21.19		1,598,412			19.82		1,645,333			16.03

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Subsequent Events (Details) In Millions, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended	0 Months Ended					0 Months Ended		0 Months Ended			0 Months Ended			0 Months Ended		0 Months Ended				0 Months Ended		0 Months Ended
	May 10, 2005	Dec. 31, 2010 USD ($)	Mar. 19, 2013 Issuance of Debt [Member] USD ($)	Mar. 19, 2013 Issuance of Debt [Member] Minimum [Member]	Mar. 19, 2013 Issuance of Debt [Member] Maximum [Member]	Dec. 31, 2012 Subsequent Event [Member] Total Offshore Angola [Member] USD ($)	Nov. 15, 2012 Subsequent Event [Member] Total Offshore Angola [Member] Option	Jan. 16, 2013 Subsequent Event [Member] West Leo [Member] USD ($)	Jan. 31, 2013 Subsequent Event [Member] Dalian Shipbuilding Industry Offshore Inc [Member] USD ($)	Feb. 11, 2013 Subsequent Event [Member] Seadrill Limited [Member]	Feb. 07, 2013 Subsequent Event [Member] Seadrill Limited [Member]	Mar. 12, 2013 Subsequent Event [Member] Seadrill Limited [Member]	Feb. 07, 2013 Subsequent Event [Member] Sevan Drilling ASA [Member]	Jan. 30, 2013 Subsequent Event [Member] Sevan Drilling ASA [Member] NOK	May 06, 2013 Subsequent Event [Member] Sevan Drilling ASA [Member] NOK	Feb. 11, 2013 Subsequent Event [Member] SapuraKencana Petroleum Berhad [Member] USD ($) Rig	Mar. 05, 2013 Subsequent Event [Member] Dalian Shipbuilding Industry Offshore Co., Ltd [Member] Rig	Feb. 11, 2013 Subsequent Event [Member] Archer Limited [Member] USD ($)	Mar. 12, 2013 Subsequent Event [Member] AOD [Member] USD ($)	Mar. 12, 2013 Subsequent Event [Member] Mermaid Maritime Plc [Member]	Nov. 15, 2012 Subsequent Event [Member] Ultra Deepwater Semi Submersible Drilling Rig [Member] Songa Eclipse Ltd [Member] USD ($)	Jan. 16, 2013 Subsequent Event [Member] Ultra Deepwater Semi Submersible Drilling Rig [Member] Tullow plc [Member]	Jan. 31, 2013 Subsequent Event [Member] Jack-up Drilling Rigs [Member] Dalian Shipbuilding Industry Offshore Inc [Member] Rig	Feb. 07, 2013 Subsequent Event [Member] Jack-up Drilling Rigs [Member] Seadrill Limited [Member] USD ($)	Mar. 05, 2013 Subsequent Event [Member] Senior Unsecured Bond [Member] USD ($)	Mar. 05, 2013 Subsequent Event [Member] Senior Unsecured Bond [Member] NOK
Subsequent Event [Line Items]
Cash consideration																					$ 590
Cash consideration, Free of charter																					698
Unfavorable contract revenue																					108
Number of one year option to extend the contract							3
Prepayment before the acquisition						59
Contractual option to extend the contract																						2 years
Estimated potential contract revenue for extension								450
Percentage of utilization for contract revenue for extension (in hundredths)								97.00%
Total estimated of project price								1,130	230
Forward Contract, Number of shares sold (in shares)											177,828,500			96,000,000
Price per share (in NOK per share)														3.95
Strike price (in NOK per share)														3.9851	3.9815
Outstanding shares exposed through forward agreements (in hundredths)											29.90%			28.52%
Issued share capital (in shares)														336,625,000
Proceeds from disposal of business unit																								73
Number of rigs																3	2						2
Acquisition price for an enterprise value																2,900
Estimated enterprise value																780
Compensation for cash flow at closing netted off for lost interest income																75
Face Amount																									316	1,800
Subsequent Amount			1,450
Variable rate basis on debt issuance			LIBOR plus a margin
Interest rate added to LIBOR (in hundredths)				2.70%	3.00%
Maturity date																									Dec. 31, 2018	Dec. 31, 2018
Private Placement [Abstract]
Short term unsecured loan converted to shares																		55
Price per share (in US dollars per share)																		$ 1.20
Compensation for underwriting parts of the private placement (in shares)																		2,811,793
Owner of shares (in shares)										231,053,239
Ownership percentage in subsidiary (in hundredths)												6618.00%						39.90%		3376.00%
Private placement (in shares)	6,000												81,828,500					82,003,000
Private placement		$ 608																	$ 100

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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Millions, unless otherwise specified	Share Capital [Member]	Additional paid-in capital [Member]	Contributed surplus [Member]	Accumulated other comprehensive income [Member]	Retained Earnings [Member]	Non-controlling Interest [Member]	Total
Balance at Dec. 31, 2009	$ 798	$ 164	$ 1,956	$ 359	$ 902	$ 634	$ 4,813
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of treasury shares	3	20					23
Purchase of treasury shares	(4)	(38)					(42)
Employee stock options issued		11					11
Issuance of shares	27	292				289	608
Induced conversion of convertible bonds	62	647					709
Convertible loan-equity portion		121					121
Other comprehensive income				(36)		(7)	(43)
Foreign exchange differences							27
Change in unrealized loss on interest rate swaps in VIEs							(11)
Step-up acquisition of Scorpion					(13)	13	0
Contribution by non-controlling interest						282	282
Paid to non-controlling interest						(292)	(292)
Dividend paid					(990)		(990)
Dividend paid to non controlling interest in VIE						(435)	(435)
Net income					1,117	55	1,172
Balance at Dec. 31, 2010	886	1,217	1,956	323	1,016	539	5,937
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of treasury shares	1	20					21
Purchase of treasury shares	(5)	(120)				(5)	(130)
Employee stock options issued		10					10
Induced conversion of convertible bonds	53	674					727
Other comprehensive income							(298)
(Un)realized gain/loss on marketable securities				(291)			(291)
Foreign exchange differences				28		10	38
Change in actuarial gain (losses) relating to pension				(3)			(3)
Costs related to capital increase in subsidiary		(7)					(7)
Change in unrealized loss on interest rate swaps in VIEs						20	20
Change in unrealized loss on interest rate swaps in subsidiaries				1			1
Establishment of non-controlling interest		307				118	425
Dividend paid					(1,423)	(17)	(1,440)
Dividend paid to non controlling interest in VIE						(23)	(23)
Shares purchased from non controlling interests		(4)				(68)	(72)
Deconsolidation of subsidiaries				(63)		(330)	(393)
Net income					1,401	81	1,482
Balance at Dec. 31, 2011	935	2,097	1,956	(5)	994	325	6,302
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of treasury shares	3	12					15
Employee stock options issued		8					8
Other comprehensive income				199		14	213
Foreign exchange differences							13
Private placement in subsidiary		84				66	150
Costs related to capital increase in subsidiary		(3)					(3)
Change in unrealized loss on interest rate swaps in VIEs							20
Establishment of non-controlling interest		134				69	203
Dividend paid					(2,019)	(50)	(2,069)
Net income					1,108	97	1,205
Balance at Dec. 31, 2012	$ 938	$ 2,332	$ 1,956	$ 194	$ 83	$ 521	$ 6,024

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 1,205	$ 1,482	$ 1,172
Other comprehensive income/(loss), net of tax:
Change in unrealized gain/(loss) on marketable securities, net	205	(291)	(25)
Change in unrealized foreign exchange differences	13	38	27
Change in actuarial (loss)/gain relating to pension	(25)	(3)	(32)
Change in unrealized gain/(loss) on interest rate swaps in subsidiaries	0	1	(2)
Deconsolidation of subsidiaries	0	(63)	0
Change in unrealized gain/(loss) on interest rate swaps in VIEs	20	20	(11)
Other comprehensive (loss)/income:	213	(298)	(43)
Total comprehensive income for the period	1,418	1,184	1,129
Comprehensive income attributable to the parent	1,341	1,073	1,081
Comprehensive income attributable to the non-controlling interest	$ 77	$ 111	$ 48

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Impairment loss on marketable securities and investments in associated companies

12 Months Ended

Dec. 31, 2012

Impairment loss on marketable securities and investments in associated companies [Abstract]

Impairment loss on marketable securities and investments in associated companies

Note 10 – Impairment loss on marketable securities and investments in associated companies

As at December 31, 2012, the Company owns a number of shares, share purchase agreements and bonds in companies including Archer Ltd., Asia Offshore Drilling Ltd., Varia Perdana Bhd., Tioman Drilling, Sevan

Drilling, Seabras Sapura, Itaunas Drilling, Camburi Drilling, Sahy Drilling, Petromena and SapuraKencana Petroleum Berhad.

In 2012, the Company determined that the decline in fair value of the Archer investment was other than temporary based primarily upon its evaluation of the severity of the excess of its cost basis over the market price of the security and the prospects for recovery within 2013. As a result, an impairment loss was recognized reducing its cost basis of this associated company to the market price of the shares in question as of December 31, 2012, which was $121 million. The impairment loss amounted to $221 million and is presented as share of result from associated companies in the consolidated statements of operations.

In 2011, the Company determined that the decline in fair value of the Archer investment was other than temporary based primarily upon its evaluation of the severity of the excess of its cost basis over the market price of the security and the future prospects. As a result, an impairment loss was recognized reducing its cost basis of this associated company to the market price of the shares in question as of December 31, 2011, which was $393 million. The impairment loss amounted to $463 million and is presented as share of result from associated companies in the consolidated statements of operations.

In 2011, the Company determined that the decline in fair value of its Seahawk Drilling Inc, "Seahawk", shares was other than temporary and as a result, an impairment loss was recognized reducing its cost basis to the market price of the shares in question as of December 31, 2011. The impairment loss amounted to $10 million and has been classified as a separate line item in the consolidated statements of operations.

In 2010, the Company determined that the decline in fair value of its Seahawk shares was other than temporary and as a result, an impairment loss was recognized reducing its cost basis to the market price of the shares in question as of December 31, 2010. The loss of $15 million was classified as a separate line item in the income statement.

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Related party transactions (Details) In Millions, except Share data, unless otherwise specified	12 Months Ended						12 Months Ended									12 Months Ended						12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 Ship Finance [Member] USD ($)	Dec. 31, 2010 Ship Finance [Member] VIEs, SFL Deepwater Ltd and SFL Polaris Ltd	Dec. 31, 2012 Ship Finance [Member] VIEs, SFL Deepwater Ltd and SFL Polaris Ltd USD ($)	Dec. 31, 2010 Ship Finance [Member] SFL Deepwater Ltd [Member] USD ($)	Dec. 31, 2012 Ship Finance [Member] SFL Deepwater Ltd [Member] West Hercules [Member] USD ($)	Dec. 31, 2012 Ship Finance [Member] SFL Deepwater Ltd [Member] West Taurus [Member] USD ($)	Dec. 31, 2010 Ship Finance [Member] SFL Polaris Limited [Member] USD ($)	Dec. 31, 2012 Ship Finance [Member] SFL Polaris Limited [Member] West Polaris [Member] USD ($)	Jun. 24, 2011 Ship Finance [Member] Rig Finance II Ltd [Member] USD ($)	Dec. 31, 2012 AOD [Member]	Jul. 31, 2012 AOD [Member] USD ($) Rig	Jul. 31, 2011 AOD [Member] Rig	Dec. 31, 2012 Metrogas [Member] USD ($)	Dec. 31, 2012 Metrogas [Member] NOK	Dec. 21, 2012 Metrogas [Member] USD ($)	Jun. 30, 2012 Metrogas [Member] USD ($)	Jun. 30, 2012 Metrogas [Member] NOK	Mar. 31, 2012 Metrogas [Member] USD ($)	Dec. 31, 2012 Frontline [Member] USD ($)	Dec. 31, 2011 Frontline [Member] USD ($)	Dec. 31, 2010 Frontline [Member] USD ($)	Dec. 31, 2012 Archer [Member] USD ($)	Jun. 30, 2012 Archer [Member] USD ($)
Related Party Transaction [Line Items]
Lease costs on units leased back from related party				$ 303				$ 75	$ 114		$ 114
Short term loan obtained by entity	131	19															140	93	50		84
Proceeds from sale of unsecured bond																500
Accrued interest on sale of unsecured bond																9
Net proceeds	1,013	0	0													415
Loan to related party																									55	20
Acquisition price of entity purchased from related party												47
Cost of allocated shares of equity method investee														54
Percentage of equity method investment ownership (in hundredths)													66.16%		33.75%
Number of MOD-V B Class jack-up rigs ordered for equity method investee														2
Number of similar units for which equity method investee has additional option agreements for construction															2
Additional shares acquired (in shares)													26,463,050
Payments of dividends to related party							290			145
Interest rate on related party debt (in hundredths)					4.50%											7.75%
Long-term debt due to related parties	935	435				435										352	2,100			1,200
Management support and administrative services fees paid to related party																						$ 2	$ 2	$ 1

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Equipment (Details) (Equipment [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Equipment [Member]
Equipment [Line Items]
Cost	$ 62	$ 40
Accumulated depreciation	(22)	(15)
Net book value	40	25
Depreciation and amortization expense	$ 7	$ 16	$ 27

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Drilling units (Details) (Drilling units [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Drilling units [Member]
Drilling units [Line Items]
Cost	$ 15,177	$ 12,898
Accumulated depreciation	(2,283)	(1,675)
Net book value	12,894	11,223
Depreciation and amortization expense	$ 608	$ 547	$ 448

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Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	SEADRILL LTD
Entity Central Index Key	0001351413
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 0
Entity Common Stock, Shares Outstanding	469,178,074
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2012

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Deconsolidation of subsidiary

12 Months Ended

Dec. 31, 2012

Deconsolidation of subsidiary [Abstract]

Deconsolidation of subsidiary

Note 11 – Deconsolidation of subsidiary

Prior to February 23, 2011, Seawell Ltd was a consolidated subsidiary of Seadrill. On February 23, 2011, the stockholders in Allis-Chalmers Inc approved a merger agreement and a plan of merger, involving Allis-Chalmers, Seawell and Wellco Sub Company, pursuant to which Allis-Chalmers became a subsidiary of Seawell. At the same time Seawell was renamed Archer.

As of February 23, 2011, we held 117,798,650 shares in Archer. Based on closing share price of NOK34.00 on February 23, 2011, this ownership had a gross value of $711 million. As a consequence of the merger, our ownership interest in Archer was reduced from 52.3% to 36.4%, and as such, Archer was deconsolidated as of February 23, 2011.

A change in control is considered a re-measurement event; therefore, upon losing control of Archer, we re-measured at fair value any retained equity interest in the former subsidiary.

(In US$ millions)	December 31, 2011
Fair value of the consideration received		-
Fair value of the retained non-controlling investment		711
The carrying amount of non-controlling interest in Archer		330
The carrying amount of Archer's assets and liabilities		(564)
Accumulated translation adjustments recycled from OCI into profit & loss		70
Accumulated actuarial loss recycled from OCI into profit & loss		(7)
Total gain		540

Subsequent to the deconsolidation, the Company purchased shares in Archer for $167 million, increasing our ownership to 39.9%. The total carrying value was impaired in 2012 and 2011, refer note 10 "Impairment loss on marketable securities and investments in associated companies."

In August 2010, Archer issued 115,400,000 new shares of par value $2.00 each at a price of NOK23.00 per share, raising a total of NOK2.6 billion. The Company subscribed for 34,873,000 of the new shares and, at the same time purchased an additional 1,757,000 shares. As a result, the Company's shareholding was reduced from 73.8% to 52.3%. Following the FASB authoritative guidance amending the accounting and reporting requirements for decreases in ownership of a subsidiary, issued in January 2010, this transaction was recorded as non-controlling interest in the balance sheet.

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Accumulated other comprehensive income (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Accumulated other comprehensive income, net of tax [Abstract]
Unrealized gain on marketable securities	$ 206	$ 1
Unrealized gain on foreign exchange	67	54
Actuarial gain/(loss) relating to pension	(30)	(11)
Change in unrealized loss on interest rate swaps in VIEs	(49)	(49)
Accumulated other comprehensive income	194	(5)
Actuarial loss related to pension, tax effect	$ 8	$ 3
Tax rate in Norway (in hundredths)	28.00%

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Newbuildings (Details) (Newbuildings [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Newbuildings [Member]
Movement in Newbuildings [Roll Forward]
Opening balance	$ 2,531	$ 1,247
Additions	1,267	2,308
Capitalized interest and loan related costs	76	73
Re-classified as Drilling Units	(1,992)	(1,097)
Closing balance	$ 1,882	$ 2,531

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CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 318	$ 483
Restricted cash	184	232
Marketable securities, net	333	24
Accounts receivables, net	917	720
Amount due from related party	293	185
Other current assets	309	323
Total current assets	2,354	1,967
Non-current assets
Investment in associated companies	509	721
Newbuildings	1,882	2,531
Drilling units	12,894	11,223
Goodwill	1,320	1,320
Restricted cash	218	250
Deferred tax assets	13	33
Equipment	40	25
Other non-current assets	402	234
Total non-current assets	17,278	16,337
Total assets	19,632	18,304
Current liabilities
Current portion of long-term debt	2,066	1,419
Trade accounts payable	72	38
Short-term deferred tax liability	6	10
Short-term debt to related party	131	19
Other current liabilities	1,338	1,285
Total current liabilities	3,613	2,771
Non-current liabilities
Long-term interest bearing debt	8,695	8,574
Long-term debt due to related parties	935	435
Deferred taxes	77	34
Other non-current liabilities	288	188
Total non-current liabilities	9,995	9,231
Commitments and contingencies (see note 32)
Equity
Common shares of par value US$2.00 per share: 800,000,000 shares authorized 469,178,074 outstanding at December 31, 2012 (December, 31 2011: 467,772,174)	938	935
Additional paid in capital	2,332	2,097
Contributed surplus	1,956	1,956
Accumulated other comprehensive income/(loss)	194	(5)
Accumulated earnings	83	994
Non-controlling interest	521	325
Total equity	6,024	6,302
Total liabilities and equity	$ 19,632	$ 18,304

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Earnings per share

12 Months Ended

Dec. 31, 2012

Earnings per share [Abstract]

Earnings per share

Note 5 – Earnings per share

The components of the numerator and denominator for the calculation of basic and diluted earnings per share resulting from continuing operations are as follows:

	Net income		Weighted average million of shares outstanding		Earnings per share
2010
Earnings per share		1,117		409		2.73
Effect of dilution:
Convertible bonds		228		60
Share options		-		2
Diluted earnings per share**		1,345		471		2.73
2011
Earnings per share		1,401		459		3.05
Effect of dilution:
Convertible bonds		45		28
Share options		-		1
Diluted earnings per share		1,446		488		2.96
2012
Earnings per share		1,108		469		2.37
Effect of dilution:
Convertible bonds		37		20
Share options		-		1
Diluted earnings per share		1,145		490		2.34

**The loss on debt extinguishment of $145 million has been added back to net income in addition to interest expenses related to the convertible bonds. These effects are anti-dilutive, and exceed the effect of increased denominator when calculating the diluted earnings per share. As a consequence of this, the diluted earnings per share equal basic earnings per share.

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Taxation

12 Months Ended

Dec. 31, 2012

Taxation [Abstract]

Taxation

Note 4 – Taxation

Income taxes consist of the following:

	Year ended December 31
(In US$ millions)	2012			2011			2010
Current tax expense:
Bermuda		-			-			-
Foreign		167			328			184
Deferred tax expense:
Bermuda		-			-			-
Foreign		58			24			14
Deferred taxes acquired during the year		-			-			-
Tax related to internal sale of assets in subsidiary, amortized for group purposes		7			(163	)		(39	)
Total provision		232			189			159
Effective tax rate		16.1	%		11.3	%		12.1	%

The Company, including its subsidiaries, is taxable in several jurisdictions based on its rig operations. A loss in one jurisdiction may not be offset against taxable income in another jurisdiction. Thus, the Company may pay tax within some jurisdictions even though it might have an overall loss at the consolidated level.

The income taxes for the years ended December 31 differed from the amount computed by applying the statutory income tax rate of 0 % as follows:

	Year ended December 31
(In US$ millions)	2012		2011		2010
Income taxes at statutory rate		-		-		-
Effect of transfers to new tax jurisdictions		7		(163)		(39	)
Effect of change on uncertain tax positions relating to prior year		91		24		-
Effect of change in taxable currency		-		-		-
Effect of taxable income in various countries		134		328		198
Total		232		189		159

Deferred Income Taxes

Deferred income taxes reflect the impact of temporary differences between the amount of assets and liabilities recognized for financial reporting purposes and such amounts recognized for tax purposes. The net deferred tax assets (liabilities) consist of the following:

Deferred Tax Assets:

(In US$ millions)	December 31, 2012		December 31, 2011
Pension		8		11
Provisions		3		15
Property, plant and equipment		-		9
Other		2		8
Gross deferred tax asset		13		43

Deferred Tax Liability:

(In US$ millions)	December 31, 2012		December 31, 2011
Property, plant and equipment		5		-
Gain from sale of fixed assets		23		31
Foreign exchange		54		-
Other		1		13
Gross deferred tax liability		83		44
Net deferred tax		(70)		(1	)

Net deferred taxes are classified as follows:

(In US$ millions)	December 31, 2012		December 31, 2011
Short-term deferred tax asset		-		10
Long-term deferred tax asset		13		33
Short-term deferred tax liability		6		10
Long-term deferred tax liability		77		34
Net deferred tax		70		1

Future taxable income justifies the inclusion of tax loss carry-forward in the calculation of net deferred taxes.

Uncertain tax positions

In October 2011, the tax authorities in Norway issued a tax reassessment pertaining to tax filings made by our consolidated subsidiary, North Atlantic Drilling Limited ("North Atlantic") for the years 2007 through 2009. The following issues were addressed in the tax reassessment:

a) the Company's 2007 tax positions relating to a possible taxable gain arising from the transfer of certain legal entities to a different tax jurisdiction. These positions also affect the relevant filed tax assessments for 2008, 2009 and 2010. To the extent there is a taxable gain, there is also an uncertainty related to the amount of such gain, and this, in turn, is affected by the timing of the transfer of the domiciles of the legal entities to a new tax jurisdiction. In the Company's opinion, the transfer by the legal entities of their domiciles took place in December 2007.

b) the principles for conversion of the functional currency for several Norwegian subsidiaries for tax reporting purposes. In the Company's view, applicable tax legislation is subject to various interpretations related to the calculation of the tax basis measured in Norwegian kroner. There is ongoing correspondence with tax authorities with regards to calculation methods for conversion of accounts in functional currency to taxable income in Norwegian kroner.

Management remains of the opinion that the tax authorities' position, related to item a) above, is based on an unconstitutional retroactive application of the law. We will vigorously defend ourselves against this claim and we have filed legal action in Norway to mitigate the liability. The case is set to be heard in October 2013 in the Oslo District Court. As for item b) above, we are in ongoing discussions with the tax authorities. In the event that we are successful in defending ourselves against these claims, current year and previous year amounts that have been recognized would be reversed into the Consolidated Statement Operations.

Management has performed an analysis for uncertain tax positions in the various jurisdictions in which the Company operates, in accordance with ASC Topic 740 Income Taxes. The Company has recognized additional expense in the Consolidated Statement of Operations of $91 million in 2012 to reflect the impact for the items above based of ongoing discussions with the tax authorities.

In 2011 the Company recorded tax expense of $24 million in the Consolidated Statement of Operations and $39 million as deferred charges in the Consolidated Balance Sheet, which is amortized over the remaining lifetime of the sold drilling units.

The changes to our liabilities related to unrecognized tax benefits, excluding interest and penalties that we recognize as a component of income tax expense, where as follows:

	Year ended December 31
(In US$ millions)	2012		2011		2010
Balance beginning of period	63		-		-
Additions during the period		91		63		-
Balance end of period		154		63		-

In relation to the above mentioned possible tax claims, Seadrill Limited has provided North Atlantic Drilling Limited with a liquidity facility covering any liquidity exposure for North Atlantic Drilling Limited and where Seadrill Limited will keep North Atlantic Drilliing Limited harmless for any tax claim exceeding $63 million related to the move of legal entities to a new tax jurisdiction and the use of US dollar as the functional currency for tax reporting purposes.

The parent company, Seadrill Limited, is headquartered in Bermuda where we have been granted a tax exemption until 2035. Other jurisdictions in which the Company and its subsidiaries operate are taxable based on rig operations. A loss in one jurisdiction may not be offset against taxable income in another jurisdiction. Thus, the Company may pay tax within some jurisdictions even though it may have an overall loss at the consolidated level. The following table summarizes the earliest tax years that remain subject to examination by the major taxable jurisdictions in which the Company operates:

Jurisdiction	Earliest Open Year
Australia	2008
Nigeria	2007
Norway	2007
Thailand	2003

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Investment in associated companies

12 Months Ended

Dec. 31, 2012

Investment in associated companies [Abstract]

Investment in associated companies

Note 16 – Investment in associated companies

The Company has the following investments that are recorded using the equity method:

	December 31, 2012			December 31, 2011			December 31, 2010
SapuraCrest Bhd ("SapuraCrest")*		-	*		23.6	%		23.6	%
Varia Perdana Sdn Bhd ("Varia Perdana")		49.0	%		49.0	%		49.0	%
Tioman Drilling Company Sdn Bhd ("Tioman")		49.0	%		49.0	%		49.0	%
C6 Technologies AS ("C6")***		-			-			50.0	%
Archer ("Archer")***		39.9	%		39.9	%		-
Asia Offshore Drilling ("AOD")**		66.2	%		33.8	%		-
Sevan Drilling ("Sevan Drilling")		28.5	%		28.5	%		-
Seabras Sapura Participacoes SA ("Seabras Sapura Participacoes")		50	%		-			-
Seabras Sapura Holdco Ltd ("Seabras Sapura Holdco")		50	%		-			-
Itaunas Drilling B.V. ("Itaunas Drilling")		30	%		-			-
Camburi Drilling B.V. ("Camburi Drilling")		30	%		-			-
Sahy Drilling B.V. ("Sahy Drilling")		30	%		-			-

* In 2012, the Company's ownership share in SapuraCrest Petroleum Bhd was reduced from 23.5% to 6.3%. This is now accounted for as available-for-sale marketable securities.

**During 2012 the Company's ownership in AOD increased from 33.8% to 66.2%. Even though the Company has 66.2% ownership in AOD, the Company does not have control and therefore, we do not consolidate AOD into Seadrill's financial statements as of December 31, 2012. We continue to account for this as an equity method investment.

*** In February 2011, we deconsolidated our majority-owned subsidiary Archer (formerly Seawell Limited). Archer is now accounted for as an associated company.

Summarized balance sheet information of the Company's equity method investees is as follows:

	As of December 31, 2012
(In US$ millions)	Current assets		Non-current assets		Current liabilities		Non-current liabilities
Varia Perdana		98		154		37		-
Tioman		82		1		61		-
Archer		639		1,945		685		972
AOD		32		141		6		-
Sevan Drilling		133		1,586		266		791
Seabras Sapura Participacoes		-		42		-		-
Seabras Sapura Holdco		-		117		-		117
Itaunas Drilling		5		114		109		-
Camburi Drilling		4		121		113		-
Sahy Drilling		2		109		66		36
TOTAL		995		4,330		1,343		1,916

	As of December 31, 2011
(In US$ millions)	Current assets		Non-current assets		Current liabilities		Non-current liabilities
SapuraCrest		716		514		505		198
Varia Perdana		136		157		64		33
Tioman		80		-		70		-
Archer		638		2,176		466		1,061
AOD		49		122		3		-
Sevan Drilling		224		1,375		117		810
TOTAL		1,843		4,344		1,225		2,102

Summarized statement of operations information for the Company's equity method investees is as follows:

	Year ended December 31, 2012
(In US$ millions)	Operating revenues		Net operating income			Net income
Varia Perdana		106		85			83
Tioman		157		12			6
Archer		2,191		(322	)		(375	)
AOD		-		(2	)		(2	)
Sevan Drilling		173		11			(12	)
Seabras Sapura Participacoes		-		-			(1	)
Seabras Sapura Holdco		-		-			-
Itaunas Drilling		-		-			-
Camburi Drilling		-		-			-
Sahy Drilling		-		(1	)		(1	)
TOTAL		2,627		(217	)		(302	)

	Year ended December 31, 2011
(In US$ millions)	Operating revenues		Net operating income			Net income
SapuraCrest		866		166			147
Varia Perdana		119		96			96
Tioman		190		(2	)		(4	)
Archer		1,855		(16	)		(77	)
AOD		-		(4	)		(4	)
Sevan Drilling		116		8			(50	)
TOTAL		3,146		248			108

	Year ended December 31, 2010
(In US$ millions)	Operating revenues		Net operating income			Net income
SapuraCrest		1,043		118			122
Varia Perdana		164		99			99
Tioman		247		9			5
C6		-		(1	)		(1	)
TOTAL		1,454		225			225

SapuraCrest is a company incorporated and listed on the Malaysian stock exchange, which provides drilling and related services to offshore oil and gas industries in Malaysia and other countries.

Varia Perdana is a company incorporated in Malaysia, which operates a fleet of tender rigs. It is 51% owned by SapuraCrest Bhd and 49% owned by Seadrill.

Tioman is a company incorporated in Malaysia, which provides well services. It is 51% owned by SapuraCrest Bhd. and 49% owned by Seadrill.

Archer is a company listed in Oslo Stock Exchange and provides drilling and well services.

Asia Offshore Drilling was established by Mermaid Maritime Public Company Limited in late 2010 when two MOD-V B Class jack-up rigs were ordered at Keppel FELS in Singapore. AOD has additional option agreements for construction of two similar units and the Company is now responsible for the construction supervision, project management and commercial management of all of AODs jack-up rigs.

Sevan Drilling is a Norwegian public limited liability company (ASA), with its tax residency in Norway. The company was listed on the Oslo Axess in May 2011 and transferred to Oslo Stock Exchange in February 2012.

Seabras Sapura Participacoes SA is a company incorporated in Brazil, which currently constructs one pipelying vessel. It is 50% owned by TL Offshore Sdn. Bhd. and 50% owned by Seadrill.

Seabras Sapura Holdco Ltd is a company incorporated in Bermuda, which currently constructs two pipelying vessels. It is 50% owned by TL Offshore Sdn. Bhd. and 50% owned by Seadrill.

Itaunas Drilling BV is a company incorporated in Holland, which currently constructs a Drillship. It is 70% owned by Sete International GmbH and 30% owned by Seadrill.

Camburi Drilling BV is a company incorporated in Holland, which currently constructs a Drillship. It is 70% owned by Sete International GmbH and 30% owned by Seadrill.

Sahy Drilling BV is a company incorporated in Holland, which currently constructs a Drillship. It is 70% owned by Sete International GmbH and 30% owned by Seadrill.

At the year-end the book values of the Company's investment in associated companies are as follows:

(In US$ millions)	December 31, 2012		December 31, 2011
SapuraCrest		-		106
Tioman		7		1
Varia Perdana		108		102
Archer		121		393
AOD		117		53
Sevan Drilling		66		66
Seabras Sapura Participacoes		21		-
Seabras Sapura Holdco		59		-
Itaunas Drilling		3		-
Camburi Drilling		4		-
Sahy Drilling		3		-
Total		509		721

The quoted market prices for Archer, AOD and Sevan Drilling as at December 31, 2012, were $121 million, 137 million and 68 million, respectively. Quoted market prices for all our other equity investments are not available because these companies are not publicly traded

At year-end the share of recorded equity in the statutory accounts of the Company's associated companies are as follows:

(In US$ millions)	December 31, 2012		December 31, 2011		December 31, 2010
SapuraCrest		-		124		112
Tioman		10		5		7
Varia Perdana		105		96		100
C6		-		-		6
Archer		370		514		-
AOD		110		57		-
Sevan Drilling		189		188		-
Seabras Sapura Participacoes		22		-		-
Seabras Sapura Holdco		-		-		-
Itaunas Drilling		3		-		-
Camburi Drilling		4		-		-
Sahy Drilling		3		-		-
Total		816		984		225

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Restricted cash

12 Months Ended

Dec. 31, 2012

Restricted cash [Abstract]

Restricted cash

Note 12 – Restricted cash

Restricted cash includes:

(In US$ millions)	December 31, 2012		December 31, 2011
CIRR deposits (see Note below)		270		298
Margin calls related to share forward agreements		69		137
Restricted deposit related to loan facility		5		5
Tax withholding deposits		58		42
Total restricted cash		402		482
Long-term restricted cash (related to CIRR deposits and loan facility)		218		250
Short-term restricted cash		184		232

Note: CIRR deposits are cash deposited with commercial banks, which match Commercial Interest Reference Rate ("CIRR") loans from Exportfinans ASA, the Norwegian export credit agency (see Note 22). The deposits are used to make repayments of the CIRR loans.

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Deconsolidation of subsidiary (Details) (Archer [Member])	0 Months Ended	1 Months Ended	12 Months Ended
	Feb. 23, 2011 NOK	Aug. 31, 2010 NOK	Dec. 31, 2011 USD ($)	Aug. 31, 2010 USD ($)
Subsidiary, Sale of Stock [Line Items]
Number of shares held (in shares)	117,798,650
Closing share price (in NOK per share)	34
Ownership interest before merger (in hundredths)	52.30%	73.80%
Ownership interest (in hundredths)	36.40%		39.90%
Re-measurement of any retained equity interest in former subsidiary at fair value [Abstract]
Fair value of the consideration received			$ 0
Fair value of the retained non-controlling investment			711,000,000
The carrying amount of non-controlling interest in Archer			330,000,000
The carrying amount of Archer's assets and liabilities			(564,000,000)
Accumulated translation adjustments recycled from OCI into profit & loss			70,000,000
Accumulated actuarial loss recycled from OCI into profit & loss			(7,000,000)
Total gain			540,000,000
Purchase of shares in Archer			167,000,000
New shares issued by Archer (in shares)		115,400,000
Par value of shares issued (in US dollars per share)				$ 2
Per share price of shares issued (in NOK per share)		23
Consideration received from shares issued		2,600,000,000
Number of shares of subscription (in shares)				34,873,000
Additional shares purchased (in shares)		1,757,000
Ownership percentage in Archer before issuance of stock (in hundredths)	52.30%	73.80%
Ownership percentage in Archer after issuance of stock (in hundredths)		52.30%

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Gain on sale of assets

12 Months Ended

Dec. 31, 2012

Gain on sale of assets [Abstract]

Gain on sale of assets

Note 8 – Gain on sale of assets

The Company has recognized the following gains and losses on sales of assets:

(In US$ millions)	Net proceeds		Book value on disposal		Gain/Loss
Year ended December 31, 2012:		-		-		-
Total for year ended December 31, 2012		-		-		-
Year ended December 31, 2011:
Sale of jack-up West Juno		248		226		22
Total for year ended December 31, 2011		248		226		22
Year ended December 31, 2010:
Sale of Jack-up rig West Larissa		55		29		26
Total for year ended December 31, 2010		55		29		26

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Equipment (Tables)

12 Months Ended

Dec. 31, 2012

Equipment [Abstract]

Equipment

Equipment consists of office equipment, furniture and fittings.

(In US$ millions)	December 31, 2012			December 31, 2011
Cost		62			40
Accumulated depreciation		(22	)		(15	)
Net book value		40			25

Depreciation and amortization expense was $7 million, $16 million and $27 million for the years ended December 31, 2012, 2011 and 2010, respectively.

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Other revenues

12 Months Ended

Dec. 31, 2012

Other revenues [Abstract]

Other revenues

Note 6 – Other revenues

Other revenues comprise the following items:

	Year ended December 31
(In US$ millions)	2012		2011			2010
Amortization of unfavorable contracts		-		24			39
Amortization of favorable contracts		(12)		(23	)		(13	)
Revenues related party		15		0			0
Total		3		1			26

The unfavorable contract values arose from the acquisition of Smedvig and Eastern Drilling in 2006 and represent the net present value of the existing contracts compared to the current market rates, discounted at the weighted average cost of capital. The estimated unfavorable contract values have been amortized and recognized under other revenues over the terms of the contracts, ranging from two to five years and are fully amortized at December 31, 2011. The favorable contract values arose from the acquisition of Scorpion in June 2010 and are amortized over a period ranging from 20 to 36 months. As of December 31, 2012 unamortized amount of favorable contracts amounted to $3 million. Related party revenues are with Varia Perdana and its subsidiary Crest Tender Rigs Pte Ltd (together "Varia Group"), and Asia Offshore Drilling. We provide management support and administrative services for Asia Offshore Drilling and receive bare boat fees from Varia Group.

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Accumulated other comprehensive income

12 Months Ended

Dec. 31, 2012

Accumulated other comprehensive income [Abstract]

Other comprehensive income

Note 7 – Accumulated other comprehensive income

Accumulated other comprehensive income for the years December 31, 2012 and December 31, 2011:

(In US$ millions)	December 31,			December 31,
	2012			2011
The total balance of accumulated other comprehensive income is made up as follows:
Unrealized gain on marketable securities		206			1
Unrealized gain on foreign exchange		67			54
Actuarial gain/(loss) relating to pension		(30	)		(11	)
Unrealized gain/ (loss) on interest rate swaps in VIEs		(49	)		(49	)
Accumulated other comprehensive income		194			(5	)

The applicable amount of income taxes associated with each component of other comprehensive income is $0 due to the fact that the items relate to companies domiciled in non-taxable jurisdictions. However, for actuarial loss related to pension, the accumulated applicable amount of income taxes is $8 million ($3 million in 2011) as this item is related to companies domiciled in Norway where the tax rate is 28%.

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Operating leases

12 Months Ended

Dec. 31, 2012

Operating leases [Abstract]

Operating leases

Note 9 – Operating leases

The Company has operating leases relating to premises, the most significant being its offices in Stavanger, London, Singapore, Houston, Rio de Janeiro, Dubai and Aberdeen. In the years ended December 31, 2012, 2011 and 2010 rental expenses amounted to $25 million, $20 million and $21 million, respectively. Future minimum rental payments are as follows:

Year	US$ million
2013		23
2014		13
2015		10
2016		7
2017		8
2018 and thereafter		21
Total		82

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Other non-current liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Other non-current liabilities [Abstract]

Other non-current liabilities

Other non-current liabilities are comprised of the following:

(In US$ millions)	December 31, 2012		December 31, 2011
Accrued pension liabilities		55		43
Deferred mobilization revenues – long-term portion		225		130
Other non-current liabilities		8		15
Total other non-current liabilities		288		188

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Restricted cash (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Restricted Cash [Line Items]
Restricted cash	$ 402	$ 482
Long-term restricted cash (related to CIRR deposits and loan facility)	218	250
Short-term restricted cash	184	232
CIRR Deposits [Member]
Restricted Cash [Line Items]
Restricted cash	270	298
Margin Calls Related to Share Forward Agreements [Member]
Restricted Cash [Line Items]
Restricted cash	69	137
Restricted Deposit Related to Loan Facility [Member]
Restricted Cash [Line Items]
Restricted cash	5	5
Tax Withholding Deposits [Member]
Restricted Cash [Line Items]
Restricted cash	$ 58	$ 42

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Non-controlling interest (Tables)

12 Months Ended

Dec. 31, 2012

Non-controlling interest [Abstract]

Changes in non-controlling interest

Changes in non-controlling interest in 2012, 2011 and 2010 are as follows:

(In US$ millions)	Scorpion		Archer			Ship Finance			North Atlantic		Seadrill Partners LLC		Total
December 31, 2010		-		326			213			-		-		539
Changes in 2011		-		(320	)		(46	)		71		-		(295	)
2011 net (loss)/income		-		(6	)		48			39		-		81
December 31, 2011		-		-			215			110		-		325
Changes in 2012		-		-			20			10		69		99
2012 net (loss)/income		-		-			39			48		10		97
December 31, 2012		-		-			274			168		79		521

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Pension benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Contributions expected to be paid [Abstract]
2013	$ 28	$ 28
2014	27	27
2015	29	29
2016	30	30
2017	32	32
2018-2022	183	183
Total payments expected during the next 10 years	329	329
Defined Benefit Pension Plan [Member]
Effect of formerly SFAS No. 158 on the consolidated balance sheet [Abstract]
Non-current liabilities	50	15
Deferred tax	(14)	(4)
Shareholders equity	(36)	(11)
Annual pension cost [Abstract]
Benefits earned during the year	12	9	18
Interest cost on prior years' benefit obligation	5	5	9
Gross pension cost for the year	17	14	27
Expected return on plan assets	(5)	(5)	(8)
Administration charges	0	0	1
Net pension cost for the year	12	9	20
Social security cost	2	1	3
Amortization of actuarial gains/losses	0	0	(1)
Amortization of net transition assets	(4)		3
Total net pension cost	10	10	19
The funded status of the defined benefit plan [Abstract]
Projected benefit obligations	171	128	215
Plan assets at market value	(122)	(91)	(150)
Accrued pension liability exclusive social security	49	37
Social security related to pension obligations	6	6
Accrued pension liabilities	55	43
Change in benefit obligations [Roll Forward]
Benefit obligations at beginning of year	128	215
Deconsolidation of Archer	0	(104)
Interest cost	5	5	9
Current service cost	12	9	18
Benefits paid	(2)	(2)
Change in unrecognized actuarial gain	22	8
Foreign currency translations	11	(4)
Acquisition/transfer members	(5)	0
Benefit obligations at end of year	171	128	215
Change in pension plan assets [Roll Forward]
Fair value of plan assets at beginning of year	91	150
Deconsolidation of Archer	0	(60)
Estimated return	5	5
Contribution by employer	28	7
Administration charges	0	0	(1)
Benefits paid	(2)	(1)
Change in unrecognized actuarial loss	(6)	(8)
Foreign currency translations	8	(2)
Acquisition/transfer members	(2)	0
Fair value of plan assets at end of year	$ 122	$ 91	$ 150
Term of Norwegian government bonds	10 years
Assumptions used in calculation of pension obligations [Abstract]
Rate of compensation increase at the end of year (in hundredths)	3.50%	4.00%	4.00%
Discount rate at the end of year (in hundredths)	4.20%	3.90%	4.20%
Prescribed pension index factor (in hundredths)	1.40%	1.10%	2.00%
Expected return on plan assets for the year (in hundredths)	4.00%	4.80%	4.60%
Employee turnover (in hundredths)	3.50%	4.00%	4.00%
Expected increases in Social Security Base (in hundredths)	3.25%	3.75%	3.75%
Pension benefit plan assets [Abstract]
Weighted-average asset allocation of funds related to defined benefit plan (in hundredths)	100.00%	100.00%
Defined Benefit Pension Plan [Member] | Equity Securities [Member]
Pension benefit plan assets [Abstract]
Weighted-average asset allocation of funds related to defined benefit plan (in hundredths)	9.20%	10.40%
Defined Benefit Pension Plan [Member] | Debt Securities [Member]
Pension benefit plan assets [Abstract]
Weighted-average asset allocation of funds related to defined benefit plan (in hundredths)	52.40%	48.60%
Defined Benefit Pension Plan [Member] | Real Estate [Member]
Pension benefit plan assets [Abstract]
Weighted-average asset allocation of funds related to defined benefit plan (in hundredths)	18.30%	18.00%
Defined Benefit Pension Plan [Member] | Money Market [Member]
Pension benefit plan assets [Abstract]
Weighted-average asset allocation of funds related to defined benefit plan (in hundredths)	18.30%	21.70%
Defined Benefit Pension Plan [Member] | Other [Member]
Pension benefit plan assets [Abstract]
Weighted-average asset allocation of funds related to defined benefit plan (in hundredths)	1.90%	1.20%
Defined Benefit Pension Plan [Member] | Onshore Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement pension as a percent of salary (in hundredths)	66.00%
Retirement age	67 years
Retirement pension cap (in hundredths)	66.00%
Multiple of base	12
Retirement age to receive pre-retirement pension	62 years
Defined Benefit Pension Plan [Member] | Offshore Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement pension as a percent of salary (in hundredths)	60.00%
Retirement age	67 years
Defined Benefit Pension Plan [Member] | Offshore Employees, Mobile Units [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement age to receive pre-retirement pension	60 years
Defined Benefit Pension Plan [Member] | Offshore Employees, Fixed Installations [Member]
Assumptions used in calculation of pension obligations [Abstract]
Expected annual early retirement from age 60/62 (in hundredths)			30.00%
Defined Benefit Pension Plan [Member] | Offshore Employees Mobile Units and Onshore Employees [Member]
Assumptions used in calculation of pension obligations [Abstract]
Expected annual early retirement from age 60/62 (in hundredths)		50.00%	50.00%
Defined Contribution Plan [Member] | Minimum [Member]
Defined Contribution Plan [Line Items]
Employee contribution (in hundredths)	5.00%
Defined Contribution Plan [Member] | Maximum [Member]
Defined Contribution Plan [Line Items]
Employee contribution (in hundredths)	8.00%

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Other current liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Other current liabilities [Abstract]

Other current liabilities

Other current liabilities are comprised of the following:

(In US$ millions)	December 31, 2012		December 31, 2011
Taxes payable		322		309
Employee withheld taxes, social security and vacation payment		83		95
Accrued interest expense		54		30
Liabilities relating to investment in shares (1)		5		-
Deferred mobilization revenues – short-term portion		96		115
Derivative financial instruments (2)		397		414
Accrued expenses		341		279
Other current liabilities		40		72
Total other current liabilities		1,338		1,314

(1) Liabilities relating to the Company's share forward contracts are recorded as short-term debt.

(2) Derivative financial instruments consist of unrealized losses on various types of derivatives.

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Goodwill and other intangible assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jan. 31, 2011
Goodwill and other intangible assets [Abstract]
Purchase price of Universal Wireline			$ 26
Goodwill [Roll Forward]
Net book balance, beginning of period	1,320	1,676
Goodwill acquired during the year	0	0
Impairment losses	0	0
Currency adjustments	0	15
Deconsolidation Archer	0	(371)
Net book balance, end of period	1,320	1,320
Well Services [Member]
Other intangible assets [Roll Forward]
Net book balance, beginning of period	0	57
Intangible assets acquired during the year	0	0
Depreciation	0	0
Deconsolidation Archer	0	(57)
Net book balance, end of period	$ 0	$ 0

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Share capital

12 Months Ended

Dec. 31, 2012

Share capital [Abstract]

Share capital

Note 27 – Share capital

	2012					2011						2010
All shares are common shares of $2.00 par value each	Shares			$millions		Shares			$millions			Shares			$millions
Authorized share capital		800,000,000			1,600		800,000,000			1,600			800,000,000			1,600
Issued and fully paid share capital		469,250,933			938		469,250,933			938			443,308,487			887
Treasury shares held by Company		(72,859	)		-		(1,478,759	)		(3	)		(182,796	)		(1	)
Outstanding shares in issue		469,178,074			938		467,772,174			935			443,125,691			886

As of December 31, 2012, the Company's shares are listed on the Oslo Stock Exchange and the New York Stock Exchange.

The Company was incorporated on May 10, 2005 and 6,000 ordinary shares of par value $2.00 each were issued. Since incorporation the number of issued shares has increased from 6,000 to 469,250,933 of par value $2.00 each as of December 31, 2012. There were no new shares issued in 2012, the number of shares issued in 2011 was 25,942,446, all due to conversion of convertible debt instruments.

A share repurchase program was approved by the Board in 2007 giving the Company the authorization to buy back shares. Shares bought back under the authorization may be cancelled or held as treasury shares. Treasury shares may be held to meet the Company's obligations relating to the share option plans (see Note 28). As at December 31, 2012 the Company held 72,859 treasury shares and net shares outstanding at December 31, 2012 were 469,178,074.

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Operating leases (Tables)

12 Months Ended

Dec. 31, 2012

Operating leases [Abstract]

Future minimum rental payments for operating leases

The Company has operating leases relating to premises, the most significant being its offices in Stavanger, London, Singapore, Houston, Rio de Janeiro, Dubai and Aberdeen. In the years ended December 31, 2012, 2011 and 2010 rental expenses amounted to $25 million, $20 million and $21 million, respectively. Future minimum rental payments are as follows:

Year	US$ million
2013		23
2014		13
2015		10
2016		7
2017		8
2018 and thereafter		21
Total		82

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Accounts receivable

12 Months Ended

Dec. 31, 2012

Accounts receivable [Abstract]

Accounts receivable

Note 14 – Accounts receivable

Accounts receivable are presented net of allowances for doubtful accounts. The allowance for doubtful accounts receivables at December 31, 2012 was $13 million (2011: $25 million).

The Company did not recognize any bad debt expenses in 2012, 2011, or 2010, but has instead reduced contract revenue for the disputed amounts.

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Goodwill and other intangible assets

12 Months Ended

Dec. 31, 2012

Goodwill and other intangible assets [Abstract]

Goodwill and other intangible assets

Note 19 – Goodwill and other intangible assets

There have been no business acquisitions for the year ended December 31, 2012.

In January 2011, our subsidiary Archer (formerly named Seawell) acquired Universal Wireline for $26 million on a debt and cash free basis, however Universal was deconsolidated together with Archer in February 2011. There were no other acquisitions in 2011.

As described in Note 2 "Accounting policies", the Company tests the value of goodwill at the end of each financial year and if the book value exceeds the fair value an impairment loss is taken. In the years ended December 31, 2012, 2011 and 2010 no impairment losses were recognized.

Goodwill:

(In US$ millions)	December 31, 2012		December 31, 2011
Net book balance at January 1		1,320		1,676
Goodwill acquired during the year		-		-
Impairment losses		-		-
Currency adjustments		-		15
Deconsolidation Archer		-		(371)
Net book balance of December 31		1,320		1,320

Other intangible assets:

Other intangible assets relate to customer relationships, technology and trademarks within the operating segment Well Services.

(In US$ millions)	December 31, 2012		December 31, 2011
Net book balance at January 1		-		57
Intangible assets acquired during the year		-		-
Depreciation		-		-
Deconsolidation Archer		-		(57)
Net book balance of December 31		-		-

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Long-term interest bearing debt and interest expenses (Details) In Millions, except Share data, unless otherwise specified			12 Months Ended		12 Months Ended				1 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended				12 Months Ended		12 Months Ended					12 Months Ended		12 Months Ended				12 Months Ended						12 Months Ended			12 Months Ended					12 Months Ended					12 Months Ended				12 Months Ended			12 Months Ended		12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2012 Credit facility, $1,500 facility [Member] USD ($)	Dec. 31, 2011 Credit facility, $1,500 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $800 facility [Member] USD ($) Tranches	Dec. 31, 2011 Credit facility, $800 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $800 facility [Member] Minimum [Member]	Dec. 31, 2012 Credit facility, $800 facility [Member] Maximum [Member]	Jul. 31, 2012 Credit facility, $585 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $585 facility [Member] USD ($)	Dec. 31, 2011 Credit facility, $585 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $100 facility [Member] USD ($) Lender	Dec. 31, 2011 Credit facility, $100 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $700 facility [Member] USD ($) Rig	Dec. 31, 2011 Credit facility, $700 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $1,200 facility [Member] USD ($) Rig	Dec. 31, 2011 Credit facility, $1,200 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $900 facility [Member] USD ($) Rig	Jul. 31, 2012 Credit facility, $900 facility [Member] USD ($)	Dec. 31, 2011 Credit facility, $900 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $440 facility [Member] USD ($) Rig	Dec. 31, 2011 Credit facility, $440 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $1,121 Lloyd's facility [Member] USD ($) Rig	Dec. 31, 2011 Credit facility, $1,121 Lloyd's facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $2,000 facility (North Atlantic) [Member] USD ($) Rig	Dec. 31, 2011 Credit facility, $2,000 facility (North Atlantic) [Member] USD ($)	Dec. 31, 2012 Credit facility, $170 facility [Member] USD ($)	Dec. 31, 2011 Credit facility, $170 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $170 facility [Member] Minimum [Member]	Dec. 31, 2012 Credit facility, $170 facility [Member] Maximum [Member]	Dec. 31, 2012 Credit facility, $550 facility [Member] USD ($)	Dec. 31, 2011 Credit facility, $550 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $400 facility [Member] USD ($)	Dec. 31, 2011 Credit facility, $400 facility [Member] USD ($)	Dec. 31, 2012 Credit facility, $300 facility [Member] USD ($)	Dec. 31, 2012 Total Bank Loans and other [Member] USD ($)	Dec. 31, 2011 Total Bank Loans and other [Member] USD ($)	Dec. 31, 2012 Ship Finance International Loans, $700 facility [Member] USD ($)	Dec. 31, 2011 Ship Finance International Loans, $700 facility [Member] USD ($)	Dec. 31, 2012 Ship Finance International Loans, $1,400 facility [Member] USD ($) Rig	Dec. 31, 2011 Ship Finance International Loans, $1,400 facility [Member] USD ($)	Dec. 31, 2012 Total Ship Finance Facilities [Member] USD ($)	Dec. 31, 2011 Total Ship Finance Facilities [Member] USD ($)	Dec. 31, 2012 Bonds [Member] USD ($)	Dec. 31, 2011 Bonds [Member] USD ($)	Dec. 31, 2012 Convertible bonds [Member] USD ($)	Dec. 31, 2011 Convertible bonds [Member] USD ($)	Dec. 31, 2012 Total Bonds [Member] USD ($)	Dec. 31, 2011 Total Bonds [Member] USD ($)	Dec. 31, 2012 Other credit facilities with corresponding restricted cash deposit [Member] USD ($) Creaditfacilities	Dec. 31, 2012 Other credit facilities with corresponding restricted cash deposit [Member] NOK Creaditfacilities	Dec. 31, 2011 Other credit facilities with corresponding restricted cash deposit [Member] USD ($)	Dec. 31, 2012 Floating interest rate bonds [Member] USD ($)	Dec. 31, 2012 Floating interest rate bonds [Member] NOK	Dec. 31, 2012 $350 million fixed interest rate bond [Member] USD ($)	May 31, 2012 $350 million fixed interest rate bond [Member] USD ($)	Dec. 31, 2011 $350 million fixed interest rate bond [Member] USD ($)	Dec. 31, 2012 $1,000 million fixed interest bond [Member] USD ($)	Dec. 31, 2012 Convertible bonds due 2017 [Member] USD ($) Banking	Dec. 31, 2012 CIRR term loan, NOK850 [Member] USD ($)	Dec. 31, 2012 CIRR term loan, NOK850 [Member] NOK	Dec. 31, 2011 CIRR term loan, NOK850 [Member] USD ($)	Dec. 31, 2012 CIRR term loan, NOK904 [Member] USD ($)	Dec. 31, 2012 CIRR term loan, NOK904 [Member] NOK	Dec. 31, 2011 CIRR term loan, NOK904 [Member] USD ($)	Dec. 31, 2011 CIRR term loan, NOK904 [Member] NOK	Dec. 31, 2012 CIRR term loan, NOK1,011 [Member] USD ($)	Dec. 31, 2012 CIRR term loan, NOK1,011 [Member] NOK	Dec. 31, 2011 CIRR term loan, NOK1,011 [Member] USD ($)	Dec. 31, 2012 Bank Loans [Member] USD ($)	Dec. 31, 2012 Secured Term Loan I $375 [Member] USD ($)	Dec. 31, 2012 Revolving Credit Facility $375 [Member] USD ($)	Dec. 31, 2012 Secured Term Loan II $150 [Member] USD ($)	Dec. 31, 2012 NOK500 fixed interest bond [Member] NOK	Dec. 31, 2011 NOK500 fixed interest bond [Member] NOK	Sep. 30, 2005 NOK500 fixed interest bond [Member] NOK
Debt Instrument [Line Items]
Total interest bearing debt	$ 10,761	$ 9,993	$ 882	$ 1,059	$ 227	$ 272				$ 0	$ 337	$ 69	$ 74	$ 560	$ 630	$ 867	$ 1,000	$ 731		$ 0	$ 101	$ 0	$ 1,019	$ 985	$ 1,750	$ 1,917	$ 83	$ 92			$ 495	$ 550	$ 360	$ 400		$ 7,144	$ 7,316	$ 397	$ 470	$ 822	$ 939	$ 1,219	$ 1,409	$ 1,567	$ 425	$ 561	$ 545	$ 2,128	$ 970	$ 270	1,499	$ 298			$ 342		$ 350			$ 72	400	$ 83	$ 77		$ 89	425	$ 121	674	$ 126					0	75
Less: current portion	(2,066)	(1,419)
Long-term portion of interest bearing debt	8,695	8,574
Debt, face amount			1,500		800							100		700		1,200		900	585		440		1,121		2,000		170				550		400		300			700		1,400													225	1,250	350			1,000	650		850			904			1,011				375	375	150			500
Assets pledged			1,733		631							79		1,126		1,477		719			112		1,248		2,417		176				712		727					594		1,035
Amount drawn from the facility																					101
Number of debt tranches					2
Interest rate added to LIBOR (in hundredths)			3.25%				1.70%	3.50%						2.50%		2.25%		2.90%			3.25%				2.00%				0.90%	1.20%			2.50%					1.25%		1.40%													3.25%	3.25%	6.50%
Maturity period of debt			5 years									6 years		5 years		5 years		5 years			5 years		7 years		6 years		6 years				5 years		5 years					5 years		5 years													2 years	2 years	5 years			5 years		8 years	8 years		8 years	8 years			12 years	12 years				5 years
Maturity date of debt																																																							October 2015			September 2017	October 2017
Payment due at maturity of debt			662		183							60		350		567		484			223		498		1,000		79				275		200																																							484
Payment due for the first three installments																																																																								18.8
Subsequent quarterly installments																																																																								22
Debt repayment									(312)
Debt repurchased																																																								8.0																				391.5
Number of tender rigs in an acquisition																		7			2
Number of lender												2
Fixed interest rate (in hundredths)												3.03%																																														5.625%	3.375%	4.56%	4.56%		4.15%	4.15%			4.15%	4.15%
Number of jack up drilling rigs in an acquisition														7							2
Number of ultra deepwater semi submersible drilling rig																1
Number of ultra deepwater drillship (West Gemini)																1
Number of tender rig (West Vencedor)																1
Number of ultra deepwater semi submersible rigs in an acquisition																							2
Number of drilling rigs in an acquisition																									6
Number of semi submersible rigs in a sale and leaseback agreement																																								2
Number of banking days																																																											10
Conversion price (in dollars per share)																																																											$ 38.92
Percentage of common shares premium (in hundredths)																																																											30.00%
Reduced conversion price (in dollars per share)																																																											$ 31.14
Convertible bonds allocated to bond equity																																																											121
Convertible bonds allocated to bond liability																																																											529
Market price to nominal value (in hundredths)																																																											135.00%
Number of equity instruments issuable (in shares)																																																											20,875,888
Equity ratio (in hundredths)																																												30.00%															30.00%											30.00%
Equity ratio, Adjusted equity to total liabilities, Minimum (in hundredths)																																												40.00%
Number of commercial interest reference rate (CIRR) credit facilities																																																		3	3
Debt covenant, cash and cash equivalents																																																																						155
Debt covenant, EBITDA to interest expense ratio																																																																						2.5:1
Debt covenant, current assets to current liabilities ratio																																																																						1:1
Debt covenant, percentage of shares in listed companies owned																																																																						20.00%
Debt covenant, net debt to EBITDA																																																																						4.5:1
Long-term Debt, Fiscal Year Maturity [Abstract]
2013	2,066
2014	1,738
2015	1,904
2016	1,017
2017 and thereafter	4,125
Effect of amortization of convertible bond	(89)
Total debt	$ 10,761	$ 9,993	$ 882	$ 1,059	$ 227	$ 272				$ 0	$ 337	$ 69	$ 74	$ 560	$ 630	$ 867	$ 1,000	$ 731		$ 0	$ 101	$ 0	$ 1,019	$ 985	$ 1,750	$ 1,917	$ 83	$ 92			$ 495	$ 550	$ 360	$ 400		$ 7,144	$ 7,316	$ 397	$ 470	$ 822	$ 939	$ 1,219	$ 1,409	$ 1,567	$ 425	$ 561	$ 545	$ 2,128	$ 970	$ 270	1,499	$ 298			$ 342		$ 350			$ 72	400	$ 83	$ 77		$ 89	425	$ 121	674	$ 126					0	75

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Accumulated other comprehensive income (Tables)

12 Months Ended

Dec. 31, 2012

Accumulated other comprehensive income [Abstract]

Accumulated other comprehensive income

Accumulated other comprehensive income for the years December 31, 2012 and December 31, 2011:

(In US$ millions)	December 31,			December 31,
	2012			2011
The total balance of accumulated other comprehensive income is made up as follows:
Unrealized gain on marketable securities		206			1
Unrealized gain on foreign exchange		67			54
Actuarial gain/(loss) relating to pension		(30	)		(11	)
Unrealized gain/ (loss) on interest rate swaps in VIEs		(49	)		(49	)
Accumulated other comprehensive income		194			(5	)

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Commitments and contingencies (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012 Drillship Rig Contract	Dec. 31, 2011
Commitments and contingencies [Abstract]
Assets pledged under mortgages and overdraft facilities	$ 12,886	$ 12,567
Number of newbuilding contracts	19
Value of newbuilding contracts	5,604	3,012
Number of new building contracts for semi submersible rigs	2
Number of new building contracts for jack up rigs	5
Number of newbuilding contracts for drillships	7
Number of newbuilding contracts for tender rigs	5
Maturity schedule for contractual commitments [Abstract]
2013	2,711
2014	1,834
2015	1,059
2016	0
2017	0
2018 and thereafter	0
Guarantor Obligations [Line Items]
Maximum potential future payment	10,536	6,289
Guarantees to customers of the Company's own performance [Member]
Guarantor Obligations [Line Items]
Maximum potential future payment	2,455	1,553
Guarantee in favor of banks [Member]
Guarantor Obligations [Line Items]
Maximum potential future payment	905	764
Guarantee in favor of suppliers [Member]
Guarantor Obligations [Line Items]
Maximum potential future payment	5,522	2,023
Guarantee in favor of Variable Interest Entities [Member]
Guarantor Obligations [Line Items]
Maximum potential future payment	1,655	1,949
Newbuildings [Member]
Maturity schedule for contractual commitments [Abstract]
2013	2,711
2014	1,834
2015	1,059
2016	0
2017	0
2018 and thereafter	$ 0

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Gain on realization of marketable securities

12 Months Ended

Dec. 31, 2012

Gain on realization of marketable securities [Abstract]

Gain on realization of marketable securities

Note 34 – Gain on realization of marketable securities

On May 17, 2012, SapuraCrest (BURSA: SCRES) and Kencana (BURSA: KEPB) jointly announced that they have entered into a merger agreement forming a new company, SapuraKencana Petroleum BHD (SapuraKencana). Consequently Seadrill received 589 million shares in the new company and a cash payment of $65 million.

This merger resulted in a dilution of our equity share from 23.59% to 11.79% and a recognized gain on decline in ownership of $169 million represented on a separate line item in our statement of operations.

On May 30, 2012, Seadrill announced the sale of 300 million shares in SapuraKencana resulting in a gain of $84 million reported as gain on realization of marketable securities in our statement of operation. Seadrill's holding of shares in SapuraKencana following this transaction represents 6.4% ownership of the outstanding shares. The net proceed from the sale of these shares was $198 million.

On February 7, 2011, Ensco plc ("Ensco") (NYSE: ESV) and Pride International, Inc. ("Pride") (NYSE: PDE) jointly announced that they have entered into a definitive merger agreement under which Ensco will combine with Pride in a cash and stock transaction. On May 31, 2011, Ensco announced the completion of its acquisition of Pride International, after both companies received shareholder approvals. Under the terms of the merger agreement, Pride stockholders received 0.4778 newly-issued shares of Ensco plus $15.60 in cash for each share of Pride common stock.

The merger represents a realization of our previously held Pride positions. The accumulated other-comprehensive income effect related to our holding in Pride amounted to $416 million as of May 31, 2011. This amount has been released into the profit and loss statement upon our acceptance of the Ensco offer, and the gain is presented on a separate line item in our financial statements. The cash effect of this transaction was $141 million in 2011.

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Gain on realization of marketable securities (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended					1 Months Ended	12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	May 31, 2012 Sapura Kencana [Member]	Dec. 31, 2012 Sapura Kencana [Member]	Jun. 30, 2012 Sapura Kencana [Member]	May 30, 2012 Sapura Kencana [Member]	May 17, 2012 Sapura Kencana [Member]	Dec. 31, 2012 SapuraCrest [Member]	Dec. 31, 2011 SapuraCrest [Member]
Business Acquisition [Line Items]
Number of shares received of merged entity (in shares)	589
Proceeds from disposal of associated companies	$ 65	$ 0	$ 0
Cash proceeds	65	141				198
Ownership interest (in hundredths)				20.00%	50.00%		11.79%	6.40%		11.80%		23.59%
Gain on decline in ownership interest	169										169
Shares sold (in shares)							300
Gain on realization of marketable securities	85	416	0				84
Percentage of marketable securities held (in hundredths)							6.40%		6.40%
Conversion factor for each newly issued share		0.4778
Additional amount paid to former shareholders (in dollars per share)		$ 15.60
Accumulated other comprehensive income effect in Pride holdings		$ 416

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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	May 10, 2005
Equity
Common shares, par value (in dollars per share)	$ 2.00	$ 2.00	$ 2.00	$ 2.00
Common shares, shares authorized (in shares)	800,000,000	800,000,000	800,000,000
Common shares, shares outstanding (in shares)	469,178,074	467,772,174	443,125,691

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Other current assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Other current assets [Abstract]
Prepaid expenses	$ 89	$ 25
Deferred charges - short term portion	24	26
Accrued revenue	15	0
Unrealized gain on total return swap agreements	7	11
Reimbursable amounts due from customers	49	154
Favorable contracts	2	12
Other	123	95
Total other current assets	$ 309	$ 323

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Segment information

12 Months Ended

Dec. 31, 2012

Segment information [Abstract]

Segment information

Note 3 – Segment information

Operating segments

The Company provides drilling and related services to the offshore oil and gas industry. Our business has been organized into segments based on differences in management structure and reporting, economic characteristics, customer base, asset class, and contract structure. We currently operate in the following three segments:

Floaters: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to semi-submersible rigs and drillships for harsh and benign environments in mid-, deep- and ultra-deep waters.

Jack-up rigs: We offer services encompassing drilling, completion and maintenance of offshore exploration and production wells. The drilling contracts relate to jack-up rigs for operations in harsh and benign environment.

Tender rigs: We offer services encompassing drilling, completion and maintenance of offshore production wells in Southeast Asia, West Africa and the Americas. The drilling contracts relate to self-erecting tender rigs and semi-submersible tender rigs.

Segment results are evaluated on the basis of operating revenues, and the information given below is based on information used for internal management reporting. The accounting principles for the segments are the same as for our consolidated financial statements.

Revenues (excluding gain on sale of drilling units)

(In US$ millions)	2012		2011		2010
Floaters		2,859		2,694		2,264
Jack-up rigs		861		776		578
Tender Rigs		758		589		482
Well Services		-		133		717
Total		4,478		4,192		4,041

Depreciation and amortization

(In US$ millions)	2012		2011		2010
Floaters		412		358		301
Jack-up rigs		146		135		99
Tender Rigs		57		63		57
Well Services		-		7		23
Total		615		563		480

Operating Income – net income

(In US$ millions)	2012			2011			2010
Floaters		1,250			1,328			1,140
Jack-up Rigs		225			220			199
Tender Rigs		316			221			222
Well Services		-			5			64
Operating income		1,791			1,774			1,625
Unallocated items:
Total financial items		(354	)		(103	)		(294	)
Income taxes		(232	)		(189	)		(159	)
Net income		1,205			1,482			1,172

Total assets

(In US$ millions)	2012		2011
Floaters		13,725		12,600
Jack-up Rigs		4,210		4,200
Tender Rigs		1,697		1,504
Total		19,632		18,304

Goodwill

(In US$ millions)	2012		2011
Floaters		890		890
Jack-up Rigs		281		281
Tender Rigs		149		149
Total		1,320		1,320

As a consequence of the change in segment structure from 2011, the Goodwill has been reassigned to the reporting units affected using a relative fair value allocation approach.

Total liabilities

(In US$ millions)	2012		2011
Floaters		9,514		8,274
Jack-up Rigs		2,918		2,745
Tender Rigs		1,176		983
Total		13,608		12,002

Capital expenditures – fixed assets

(In US$ millions)	2012		2011		2010
Floaters		1,342		1,805		1,330
Jack-up Rigs		150		495		877
Tender Rigs		198		243		134
Well Services		-		-		27
Total		1,690		2,543		2,368

Geographic segment data

Revenues are attributed to geographical segments based on the country of operations for drilling activities, i.e. the country where the revenues are generated. The following presents the Company's revenues and fixed assets by geographic area:

Revenues (excluding gain on sale of assets)

(In US$ millions)	2012		2011		2010
Norway		815		966		1,393
UK		230		56		151
Brunei		95		54		66
Thailand		310		303		165
Malaysia		226		207		62
Congo		2		-		37
Nigeria		419		235		204
Canada		66		-		-
USA		260		202		186
Brazil		629		913		710
China		183		299		230
Indonesia		92		130		159
Philippines		-		-		109
Vietnam		180		157		150
Angola		358		337		182
Red Sea		-		-		68
Trinidad & Tobago		83		41		-
Ghana		122		-		-
Saudi Arabia/Kuwait		146		127		69
Mexico		137		49		-
Other		125		116		100
Total		4,478		4,192		4,041

Fixed assets – operating drilling units (1)

(In US$ millions)	2012		2011
Norway		1,868		2,007
UK		1,112		-
Brunei		197		38
Thailand		354		605
Malaysia		690		333
Congo		161		-
Nigeria		1,148		1,191
Canada		546		-
USA		1,296		496
Brazil		1,714		2,096
China		-		1,091
Indonesia		99		321
Vietnam		337		336
Angola		945		979
Trinidad & Tobago		252		424
Ghana		655
Saudi Arabia		661		331
Mexico		593		605
Other		267		370
Total		12,894		11,223

(1) The fixed assets referred to in the table are the Company's operating drilling units. Asset locations at the end of a period are not necessarily indicative of the geographic distribution of the revenues or operating profits generated by such assets during such period.

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Drilling units (Tables)

12 Months Ended

Dec. 31, 2012

Drilling units [Abstract]

Drilling units

(In US$ millions)	December 31, 2012		December 31, 2011
Cost		15,177		12,898
Accumulated depreciation		(2,283)		(1,675)
Net book value		12,894		11,223

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Operating leases (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating leases [Abstract]
Rent expense	$ 25	$ 20	$ 21
Operating leases, future minimum payments due, fiscal year maturity [Abstract]
2013	23
2014	13
2015	10
2016	7
2017	8
2018 and thereafter	21
Total	$ 82

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Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Variable Interest Entities (VIEs) [Abstract]
Number of semi submersible rigs under sale leaseback arrangements	2
Term of lease contracts	15 years
Assets and liabilities in the statutory accounts of the VIE [Abstract]
Book value of units in the Company's consolidated accounts	$ 12,894	[1]	$ 11,223	[1]
SFL West Polaris Limited [Member]
Variable Interest Entity [Line Items]
Name of unit	West Polaris		West Polaris
Assets and liabilities in the statutory accounts of the VIE [Abstract]
Investment in finance lease	534		611
Other assets	7		12
Total assets	541		623
Long term debt	360		398
Other liabilities	107		174
Total liabilities	467		572
Equity	74		51
Book value of units in the Company's consolidated accounts	594		614
SFL Deepwater Ltd [Member]
Variable Interest Entity [Line Items]
Name of unit	West Taurus West Hercules		West Taurus West Hercules
Assets and liabilities in the statutory accounts of the VIE [Abstract]
Investment in finance lease	1,120		1,240
Other assets	20		23
Total assets	1,140		1,263
Long term debt	0		822
Other liabilities	989		326
Total liabilities	989		1,148
Equity	151		115
Book value of units in the Company's consolidated accounts	1,035		1,021
West Polaris [Member]
Sale Leaseback Transaction [Line Items]
Effective from	Jul 2008
Sale value	850
First repurchase option	548
Month of first repurchase option	September 2012
Last repurchase option	178	[2]
Month of last repurchase option	Jun 2023	[2]
Put option exercisable at end of lease terms	75
Base LIBOR Interest Rate (in hundredths)	2.85%
Bareboat charter rates per day, five year schedule [Abstract]
2013	223.3
2014	176.5
2015	175.4
2016	170.0
2017	170.0
West Taurus [Member]
Sale Leaseback Transaction [Line Items]
Effective from	Nov 2008
Sale value	850
First repurchase option	418
Month of first repurchase option	February 2015
Last repurchase option	149	[2]
Month of last repurchase option	Nov 2023	[2]
Repurchase obligation	149
Base LIBOR Interest Rate (in hundredths)	4.25%
Bareboat charter rates per day, five year schedule [Abstract]
2013	316.2	[3]
2014	320.7
2015	165.0
2016	158.8
2017	157.5
Fixed interest rate for the period (in hundredths)	2.17%
West Hercules [Member]
Sale Leaseback Transaction [Line Items]
Effective from	Oct 2008
Sale value	850
First repurchase option	580
Month of first repurchase option	August 2011
Last repurchase option	135	[2]
Month of last repurchase option	Aug 2023	[2]
Repurchase obligation	135
Base LIBOR Interest Rate (in hundredths)	4.25%
Bareboat charter rates per day, five year schedule [Abstract]
2013	250.0
2014	238.5
2015	180.0
2016	172.5
2017	$ 170.0

[1] The fixed assets referred to in the table are the Company's operating drilling units. Asset locations at the end of a period are not necessarily indicative of the geographic distribution of the revenues or operating profits generated by such assets during such period.

[2] For the unit West Polaris, Ship Finance has a put option exercisable at the end of the lease terms by which the vessel may be sold to Seadrill for a fixed price of $75 million. For West Taurus and West Hercules repurchase obligations at the end of the lease terms have been agreed, at $149 million and $135 million, respectively.

[3] For a period the interest rates West Taurus have been fixed at 2.17% regardless of movements in LIBOR interest rates. The fixed charter rate is reflected in the above table.

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Pension benefits (Tables)

12 Months Ended

Dec. 31, 2012

Pension benefits [Abstract]

Effect of formerly SFAS No. 158 on the consolidated balance sheet

Consolidated balance sheet position

(In US$ millions)	2012			2011
Non-current liabilities		50			15
Deferred tax		(14	)		(4	)
Shareholders equity		(36	)		(11	)

Annual pension cost

Annual pension cost

(In US$ millions)	2012			2011			2010
Benefits earned during the year		12			9			18
Interest cost on prior years' benefit obligation		5			5			9
Gross pension cost for the year		17			14			27
Expected return on plan assets		(5	)		(5	)		(8	)
Administration charges		-			-			1
Net pension cost for the year		12			9			20
Social security cost		2			1			3
Amortization of actuarial gains/losses		-			-			(1	)
Amortization of net transition assets		(4	)		-			3
Total net pension cost		10			10			19

Funded status of the defined benefit plan

The funded status of the defined benefit plan

(In US$ millions)	December 31, 2012			December 31, 2011
Projected benefit obligations		171			128
Plan assets at market value		(122	)		(91	)
Accrued pension liability exclusive social security		49			37
Social security related to pension obligations		6			6
Accrued pension liabilities		55			43

Change in benefit obligations

Change in benefit obligations

(In US$ millions)	2012			2011
Benefit obligations at beginning of year		128			215
Deconsolidation of Archer		-			(104	)
Interest cost		5			5
Current service cost		12			9
Benefits paid		(2	)		(2	)
Change in unrecognized actuarial gain		22			8
Foreign currency translations		11			(4	)
Acquisition/transfer members		(5	)		-
Benefit obligations at end of year		171			128

Change in pension plan assets

Change in pension plan assets

(In US$ millions)	2012			2011
Fair value of plan assets at beginning of year		91			150
Deconsolidation of Archer		-			(60	)
Estimated return		5			5
Contribution by employer		28			7
Administration charges		-			-
Benefits paid		(2	)		(1	)
Change in unrecognized actuarial loss		(6	)		(8	)
Foreign currency translations		8			(2	)
Acquisition/transfer members		(2	)		-
Fair value of plan assets at end of year		122			91

Assumptions used in calculation of pension obligations

Assumptions used in calculation of pension obligations	2012			2011			2010
Rate of compensation increase at the end of year		3.50	%		4.00	%		4.00	%
Discount rate at the end of year		4.20	%		3.90	%		4.20	%
Prescribed pension index factor		1.40	%		1.10	%		2.00	%
Expected return on plan assets for the year		4.00	%		4.80	%		4.60	%
Employee turnover		3.50	%		4.00	%		4.00	%
Expected increases in Social Security Base		3.25	%		3.75	%		3.75	%
Expected annual early retirement from age 60/62:
Offshore personnel fixed installations								30.0	%
Offshore personnel and onshore employees					50.0	%		50.0	%

Weighted-average asset allocation of funds related to defined benefit plan

The weighted-average asset allocation of funds related to the Company's defined benefit plan at December 31, was as follows:

Pension benefit plan assets	2012			2011
Equity securities		9.2	%		10.4	%
Debt securities		52.4	%		48.6	%
Real estate		18.3	%		18.0	%
Money market		18.3	%		21.7	%
Other		1.9	%		1.20	%
Total		100.0	%		100.0	%

Expected annual pension plan contributions under defined benefit plans

The table below shows the Company's expected annual pension plan contributions under defined benefit plans for the years 2013-2022. The expected payments are based on the assumptions used to measure the Company's obligations at December 31, 2012 and include estimated future employee services.

(In US$ millions)	December 31 2012
2013		28
2014		27
2015		29
2016		30
2017		32
2018-2022		183
Total payments expected during the next 10 years		329

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Equipment

12 Months Ended

Dec. 31, 2012

Equipment [Abstract]

Equipment

Note 20 – Equipment

Equipment consists of office equipment, furniture and fittings.

(In US$ millions)	December 31, 2012			December 31, 2011
Cost		62			40
Accumulated depreciation		(22	)		(15	)
Net book value		40			25

Depreciation and amortization expense was $7 million, $16 million and $27 million for the years ended December 31, 2012, 2011 and 2010, respectively.

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General information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 DrillingUnit	Dec. 31, 2011		Dec. 31, 2010
General information [Abstract]
Number of offshore drilling units owned by the Company	43
Number of offshore drilling units under construction	23
Percentage of voting control for certain variable interest entities (in hundredths)	50.00%
Decrease in cash provided by operating activities	$ 133	$ 147		$ 90
Increase in cash used by investing activities		$ 147		$ 90
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)	20.00%
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)	50.00%
Archer [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)	39.90%	39.90%	[1]	0.00%	[1]

[1] In February 2011, we deconsolidated our majority-owned subsidiary Archer (formerly Seawell Limited). Archer is now accounted for as an associated company.

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Risk management and financial instruments

12 Months Ended

Dec. 31, 2012

Risk management and financial instruments [Abstract]

Risk management and financial instruments

Note 31 – Risk management and financial instruments

The majority of our gross earnings from rigs and vessels are receivable in U.S. dollars and the majority of our other transactions, assets and liabilities are denominated in U.S. dollars, the functional currency of the Company. However, the Company has operations and assets in a number of countries worldwide and incurs expenditures in other currencies, causing its results from operations to be affected by fluctuations in currency exchange rates, primarily relative to the U.S. dollar. The Company is also exposed to changes in interest rates on floating interest rate debt, and to the impact of changes in currency exchange rates on NOK denominated debt. There is thus a risk that currency and interest rate fluctuations will have a negative effect on the value of the Company's cash flows.

Interest rate risk management

The Company's exposure to interest rate risk relates mainly to its floating interest rate debt and balances of surplus funds placed with financial institutions. This exposure is managed through the use of interest rate swaps and other derivative arrangements. The Company's objective is to obtain the most favorable interest rate borrowings available without increasing its foreign currency exposure. Surplus funds are generally placed in fixed deposits with reputable financial institutions, yielding higher returns than are available on overnight deposits in banks. Such deposits generally have short-term maturities, in order to provide the Company with flexibility to meet all requirements for working capital and capital investments. The extent to which the Company utilizes interest rate swaps and other derivatives to manage its interest rate risk is determined by the net debt exposure and its views on future interest rates.

Interest rate swap agreements not qualified as hedge accounting

At December 31, 2012, the Company had interest rate swap agreements with an outstanding principal of $6,148 million (2011: $4,738 million). In addition, the Company had outstanding cross currency interest rate swaps at December 31, 2012 with a principal amount of $216 million (2011: $34 million). These agreements do not qualify for hedge accounting, and accordingly any changes in the fair values of the swap agreements are included in the consolidated statement of operations under "Gain/(loss) on derivative financial instruments". The combined total fair value of the interest rate swaps and cross currency interest swaps outstanding December 31, 2012 amounted to a liability of $376 million (2011: a liability of $345 million).The fair value of the interest rate swaps are classified as other current liabilities and the cross currency interest swaps are classified as other current assets in our balance sheet as of December 31, 2012.

The Company's interest rate swap and cross currency interest rate swap agreements as at December 31, 2012, were as follows:

Outstanding principal		Receive rate	Pay rate			Length of contract
(In US$ millions)
	50	3 month LIBOR		4.63	%	May 2005 - May 2015
	300	3 month LIBOR		3.16	%	Dec 2008 - Dec 2018
	150	3 month LIBOR		3.34	%	June 2013 - June 2018
	150	3 month LIBOR		3.30	%	June 2013 - June 2018
	200	3 month LIBOR		2.83	%	Jan 2011 - Jan 2018
	200	3 month LIBOR		3.27	%	Mar 2013 - Mar 2018
	350	3 month LIBOR		3.80	%	Sep 2011 - Sep 2017
	300	3 month LIBOR		3.54	%	Sep 2011 - Jun 2017
	71	6 month LIBOR		3.83	%	Mar 2008 - Sep 2016
	350	3 month LIBOR		3.36	%	Sep 2011 - Jun 2016
	100	3 month LIBOR		2.22	%	Jan 2011 - Jan 2016
	100	3 month LIBOR		2.24	%	Jan 2011 - Jan 2016
	200	3 month LIBOR		2.17	%	Jan 2011 - Jan 2016
	200	3 month LIBOR		2.17	%	Jan 2011 - Jan 2016
	250	3 month LIBOR		2.71	%	May 2009 - May 2014
	250	3 month LIBOR		2.62	%	May 2009 - May 2014
	500	3 month LIBOR		2.06	%	Mar 2009 - Mar 2014
	100	3 month LIBOR		2.17	%	Aug 2012 - Aug 2017
	100	3 month LIBOR		2.17	%	Aug 2012 - Aug 2017
	200	3 month LIBOR		2.57	%	June 2012 - June 2017
	100	3 month LIBOR		2.56	%	June 2012 - June 2017
	100	3 month LIBOR		2.74	%	May 2012 - May 2017
	200	3 month LIBOR		2.14	%	May 2011 - Jan 2016
	200	3 month LIBOR		2.14	%	May 2011 - Jan 2016
	100	3 month LIBOR		1.15	%	Dec 2012 – Dec 2019
	289	3 month LIBOR		1.11	%	Oct 2012 – Dec 2019
	289	3 month LIBOR		1.38	%	Oct 2012 – Dec 2022
	100	3 month LIBOR		1.36	%	Oct 2012 – Oct 2019
	250	3 month LIBOR		0.74	%	Nov 2012 – Nov 2017
	200	3 month LIBOR		1.36	%	Oct 2012 – Oct 2019
	200	3 month LIBOR		1.18	%	Dec 2012 – Dec 2019

The counterparties to the above agreements are DnBNOR Bank ASA, Swedbank AB, Danske Bank, and ING Bank N.V. Credit risk exists to the extent that the counterparties are unable to perform under the contracts, but this risk is considered remote as the counterparties are banks which have all provided loan finance to us and the interest rate swaps are related to those financing arrangements.

Interest rate hedge accounting

Two of the Ship Finance subsidiaries consolidated by the Company as VIE's have entered into interest rate swaps in order to mitigate the Company's exposure to variability in cash flows for future interest payments on the loans taken out to finance the acquisition of West Polaris and West Taurus. These interest rate swaps qualify for hedge accounting and any changes in their fair value are included in "Other comprehensive income/loss". Below is a summary of the notional amounts, fixed interest rates payable and durations of these interest rate swaps.

Outstanding principal	Receive rate	Pay rate			Length of contract
(In US$ millions)
470 (West Polaris )	1 month LIBOR		3.89	%	July 2008 - Oct 2012
518 (West Taurus)	1 month LIBOR		2.19	%	Dec 2008 - Aug 2013

In the year ended December 31, 2012 the above two VIE Ship Finance subsidiaries recorded fair value gains of $20 million on their interest rate swaps. These gains were recorded by those VIEs as "Other comprehensive income" but due to their ownership by Ship Finance these gains are allocated to "Non-controlling interest" in our equity statement.

Any change in fair value resulting from hedge ineffectiveness is recognized immediately in earnings. The two VIEsand therefore the Company, did not recognize any gain or loss due to hedge ineffectiveness in the consolidated financial statements during the years ended December 31, 2012, 2011 and 2010 relating to derivative financial instruments.

Foreign currency risk management

The Company uses foreign currency forward contracts and other derivatives to manage its exposure to foreign currency risk on certain assets, liabilities and future anticipated transactions. Such derivative contracts do not qualify for hedge accounting treatment and are recorded in the balance sheet under receivables if the contracts have a net positive fair value, and under other short-term liabilities if the contracts have a net negative fair value. At December 31, 2012, the Company had forward contracts and cross currency interest rate swaps to sell approximately $528 million between January 2013 and May 2013 at exchange rates ranging from NOK5.63 to NOK5.77 per US dollar. The total fair value of currency forward contracts December 31, 2012 amounted to $4 million (December 31, 2011: minus $3 million).

Total Return Swap Agreements

In February 2010, a TRS agreement with 4,500,000 shares in Seadrill as underlying security was settled and the Company simultaneously entered a new TRS agreement for 3,500,000 of common shares in Seadrill with an agreed reference price of NOK125.70 per share and an expiration date in February 2011. In September 2010, the Company partly settled the TRS agreement and reduced the number of underlying Seadrill Limited shares by 750,000 shares from 3,500,000 shares to 2,750,000 common shares.

In January 2011, the Company partly settled the TRS agreement and further reduced the number of underlying Seadrill Limited shares by 750,000 shares from 2,750,000 to 2,000,000 common shares.

In September 2011, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in March 2012 and the agreed reference price was NOK177.21 per share.

In March 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in September and the agreed reference price was NOK 224.70 per share.

In September 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expired in December and the agreed reference price was NOK 242.80 per share.

In December, 2012, the contract was settled and simultaneously a new TRS agreement with 2,000,000 Seadrill Limited shares as underlying security was entered into. This agreement expires in March 2013 and the agreed reference price was NOK 220.32 per share.

The total realized and unrealized gain relating to TRS agreements in 2012 amounted to $7 million (2011: $5 million, 2010: $27 million).

Credit risk

The Company has financial assets, including cash and cash equivalents, marketable securities, other receivables and certain amounts receivable on derivative instruments, mainly forward exchange contracts and interest rate swaps. These assets expose the Company to credit risk arising from possible default by the counterparty. The Company considers the counterparties to be creditworthy financial institutions and does not expect any significant loss to result from non-performance by such counterparties. The Company, in the normal course of business, does not demand collateral. The credit exposure of interest rate swap agreements, currency option contracts and foreign currency contracts is represented by the fair value of contracts with a positive fair value at the end of each period, reduced by the effects of master netting agreements. It is the Company's policy to enter into master netting agreements with the counterparties to derivative financial instrument contracts, which give the Company the legal right to discharge all or a portion of amounts owed to a counterparty by offsetting them against amounts that the counterparty owes to the Company.

Fair values

The carrying value and estimated fair value of the Company's financial instruments at December 31, 2012 and December 31, 2011 are as follows:

	December 31, 2012				December 31, 2011
(In US$ millions)	Fair value		Carrying value		Fair value		Carrying value
Cash and cash equivalents		318		318		483		483
Restricted cash		402		402		482		482
Current portion of long-term debt		2,066		2,066		1,419		1,419
Long-term portion of floating rate debt		6,287		6,287		7,711		7,711
Long term portion of fixed rate CIRR loans		218		218		250		250
Fixed interest loans		70		69		77		74
Fixed interest convertible bonds		872		561		735		545
Fixed interest bonds		1,360		1,342		333		350
Floating interest bonds		224		224		75		75

The carrying value of cash and cash equivalents and restricted cash, which are highly liquid, is a reasonable estimate of fair value and categorized at level 1 on the fair value measurement hierarchy.

The fair value of the current and long-term portion of floating rate debt is estimated to be equal to the carrying value since it bears variable interest rates, which are reset regularly and usually in the range between every 1 to 6 months. This debt is not freely tradable and cannot be purchased by the Company at prices other than the outstanding balance plus accrued interest. We have categorized this at level 2 on the fair value measurement hierarchy.

The fair value of the long-term portion of the fixed rate CIRR loans is equal to the carrying value, as they are matched with equal balances of restricted cash. We have categorized this at level 2 on the fair value measurement hierarchy.

The convertible bonds are freely tradable and their fair value has been set equal to the price at which they were traded at on December 31, 2012 and 2011. We have categorized this at level 1 on the fair value measurement hierarchy.

The fixed interest rate bonds are freely tradable and their fair value has been set equal to the price at which they were traded at on December 31, 2012 and December 31, 2011. We have categorized this at level 1 on the fair value measurement hierarchy.

Financial instruments that are measured at fair value on a recurring basis:

	Fair value		Fair value measurements at reporting date using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In US$ millions)	December 31, 2012		(Level 1)		(Level 2)		(Level 3)
Assets:
Marketable securities		333		329	-			4
Other derivative instruments – short term receivable		11		-		11		-
Total assets		344		329		11		4
Liabilities:
Interest rate swap contracts – short term payable		388		-		388		-
Other derivative instruments – short term payable		8		-		8		-
Total liabilities		396		-		396		-

	Fair value		Fair value measurements at reporting date using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In US$ millions)	December 31, 2011		(Level 1)		(Level 2)		(Level 3)
Assets:
Marketable securities		24		4	-			20
Other derivative instruments – short term receivable		3		1		2		-
TRS equity swap contracts		11		-		11		-
Total assets		38		5		13		20
Liabilities:
Interest rate swap contracts – short term payable		372		-		372		-
Currency forward contracts – short term payable		3		-		3		-
Other derivative instruments – short term payable		39		-		39		-
Total liabilities		414		-		414		-

Roll forward of fair value measurements using unobservable inputs (Level 3):

(In US$ millions)
Beginning balance January 1, 2012	20
Realization	(16	)
Purchase	-
Changes in fair value of bonds	-
Closing balance December 31, 2012	4

ASC 820 Fair Value Measurement and Disclosures emphasizes that fair value is a market-based measurement, not an entity-specific measurement, and should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within levels one and two of the hierarchy) and the reporting entity's own assumptions about market participant assumptions (unobservable inputs classified within level three of the hierarchy).

Level one input utilizes unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Level two inputs are inputs other than quoted prices included in level one that are observable for the asset or liability, either directly or indirectly. Level two inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability, other than quoted prices, such as interest rates, foreign exchange rates and yield curves that are observable at commonly quoted intervals. Level three inputs are unobservable inputs for the asset or liability, which are typically based on an entity's own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

Quoted market prices are used to estimate the fair value of marketable securities, which are valued at fair value on a recurring basis.

The fair value of total return equity swaps is calculated using the closing prices of the underlying listed shares, dividends paid since inception and the interest rate charged by the counterparty.

The fair values of interest rate swaps and forward exchange contracts are calculated using well-established independent valuation techniques applied to contracted cash flows and LIBOR and NIBOR interest rates as of December 31, 2012.

The fair value of other derivative instruments is calculated using the closing prices of the underlying securities, dividends paid since inception and the interest charged by the counterparty.

Retained Risk

a) Physical Damage Insurance

The Company retains the risk, through self-insurance, for the deductibles relating to physical damage insurance on the Company's rig fleet, currently a maximum of $5 million per occurrence.

b) Loss of Hire Insurance

The Company purchases insurance to cover the Deepwater rigs, 3 semi tenders and the North Atlantic fleet for loss of revenue in the event of extensive downtime caused by physical damage, where such damage is covered under the Company's physical damage insurance. The Company's self-insured retentions under the loss of hire insurance are up to 60 days after the occurrence of the physical damage. Thereafter, under the terms of the insurance, the Company is compensated for loss of revenue for a period ranging from 210 days up to 290 days. The Company retains the risk that the repair of physical damage takes longer than the total number of days in the loss of hire policy.

Concentration of risk

The Company has financial assets, including cash and cash equivalents, marketable securities, other receivables and certain derivative instrument receivable amounts. These other assets expose the Company to credit risk arising from possible default by the counterparty. There is also a concentration of credit risk with respect to cash and cash equivalents to the extent that most of the amounts are carried with DnB NOR Bank ASA, Nordea Bank Finland Plc, Fokus Bank, and ING Bank N.V. The Company considers these risks to be remote.

In the year ended December, 31, 2012, 15% of the Company's contract revenues were received from Petroleo Brasileiro S.A ("Petrobras") (2011: 17%), 14% from Total S.A Group ("Total") (2011: 15%), 11% from Exxon Mobil Corp ("Exxon") (2011: 10%), 10% from Royal Dutch Shell Group ("Shell") (2011: 10%) and 9% from Statoil ASA ("Statoil": 7%).

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Marketable securities

12 Months Ended

Dec. 31, 2012

Marketable securities [Abstract]

Marketable securities

Note 13 – Marketable securities

Marketable securities held by the Company are equity securities considered to be available-for-sale securities or trading securities.

(In US$ millions)	December 31, 2012		December 31, 2011
Original cost		128		24
Unrealized gain on marketable securities		205		-
Carrying value		333		24

Year end 2011 the Company owned a 23.6% share in SapuraCrest Petroleum Bhd, which was accounted for using the equity method investment with income pickup in arrears. On May 17, 2012 SapuraCrest Petroleum Bhd and Kencana Petroleum Bhd merged resulting in dilution of our shareholdings from 23.6% to 11.8% recognizing a gain of $169 million presented in the statement of operations. The investment was consequently transferred from Investment in associated companies to an investment accounted for at fair value as an available-for-sale security. During first half of 2012 we further reduced our ownershare to 6.4% through sale of shares recognizing a gain of $84 million presented in the statement of operations.

The net unrealized holding gains as of December 31, 2012 amounted to $205 million. This represents the unrealized gain on our SapuraKencana investment recorded in accumulated other comprehensive income in the balance sheet.

The net unrealized holding gains as of December 31, 2011 amounted to zero. This represents the net of $1 million unrealized gain recorded in accumulated other comprehensive income in the balance sheet and an unrealized loss of $1 million recorded through the profit and loss statement.

Marketable securities held by us include approximately 81.1% of the partially redeemed Petromena NOK2,000 million bond ("Petromena") and 6.4% of SapuraKencana . Marketable securities and changes in their carrying value are as follows:

(In US$ millions)	Ensco			Petromena		Golden Close			Sapura Kencana			Total
Historic cost at December 31, 2011		5			4		15			-			24
Fair Market value adjustments recognized via OCI		-			-		1			-			1
Fair Market value adjustments recognized via P&L		(1	)		-		-			-			(1	)
Net book value at December 31, 2011		4			4		16			-			24
Additions		-			-		-			237			237
Fair market value adjustments recognized via OCI		-			-		-			84			84
Release of OCI into profit & loss		-			-		(1	)		(84	)		(85	)
Realization of historic cost		(4	)		-		(15	)		(113	)		(132	)
Other than temporary impairments		-			-		-			-			-
Historic cost at Dec 31, 2012		-			4		-			124			128
Fair Market value adjustments recognized via OCI		-			-		-			205			205
Fair Market value adjustments recognized via P&L		-			-		-			-			-
Net book value at December 31, 2012		-			4		-			329			333

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Share option plans (Details) In Millions, except Share data, unless otherwise specified	12 Months Ended		1 Months Ended						12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Nov. 30, 2011 Stock Options [Member] USD ($)	Nov. 30, 2011 Stock Options [Member] NOK	Nov. 30, 2010 Stock Options [Member] USD ($)	Nov. 30, 2010 Stock Options [Member] NOK	Apr. 30, 2010 Stock Options [Member] USD ($)	Apr. 30, 2010 Stock Options [Member] NOK	Dec. 31, 2012 Stock Options [Member] USD ($)	Dec. 31, 2011 Stock Options [Member] USD ($)	Dec. 31, 2010 Stock Options [Member] USD ($)	Dec. 31, 2009 Stock Options [Member] USD ($)	Dec. 31, 2009 Stock Options [Member] NOK	Dec. 31, 2008 Stock Options [Member] USD ($)	Dec. 31, 2008 Stock Options [Member] NOK	Dec. 31, 2007 Stock Options [Member] USD ($)	Dec. 31, 2007 Stock Options [Member] NOK	Dec. 31, 2006 Stock Options [Member] USD ($)	Dec. 31, 2006 Stock Options [Member] NOK	Dec. 31, 2012 Stock Options [Member] Minimum [Member] NOK	Dec. 31, 2012 Stock Options [Member] Maximum [Member] NOK	Dec. 31, 2012 Seadrill Scheme [Member] Stock Options [Member] USD ($)	Dec. 31, 2011 Seadrill Scheme [Member] Stock Options [Member] USD ($)	Dec. 31, 2010 Seadrill Scheme [Member] Stock Options [Member] USD ($)	Dec. 31, 2012 Seadrill Scheme [Member] Stock Options [Member] Minimum [Member]	Dec. 31, 2012 Seadrill Scheme [Member] Stock Options [Member] Maximum [Member]	Dec. 31, 2012 2011 Program [Member] Stock Options [Member]
Share option plans [Abstract]
Share options granted recognized as personnel expenses	$ 8	$ 10
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period																									1 year	5 years
Fair value assumptions used to determine the value of options [Abstract]
Risk-free interest rate (in hundredths)									2.25%	2.72%																	0.67%
Volatility (in hundredths)									28.00%	31.00%																	24.30%
Dividend yield (in hundredths)									0.00%	0.00%																	0.00%
Option holder retirement rate (in hundredths)									0.00%	0.00%
Expected option term									5 years	5 years																	4 years
Vesting of options granted (in hundredths)																						100.00%
Options [Roll Forward]
Outstanding at beginning of year (in shares)																						5,420,438	5,512,400	6,199,833
Granted (in shares)																						181,012	1,786,771	1,910,000
Exercised (in shares)																						(1,415,000)	(1,638,165)	(2,329,000)
Forfeited (in shares)																						(312,559)	(240,568)	(268,433)
Outstanding at end of year (in shares)																						3,875,891	5,420,438	5,512,400
Exercisable at end of year (in shares)																						1,164,214	1,598,412	1,645,333
Weighted average exercise price [Roll Forward]
Outstanding at beginning of year (in US dollars per share)																						$ 26.16	$ 20.30	$ 13.87
Granted (in US dollars per share)																						$ 37.41	$ 34.68	$ 29.94
Exercised (in US dollars per share)																						$ 16.39	$ 16.33	$ 11.88
Forfeited (in US dollars per share)																						$ 30.84	$ 21.98	$ 14.99
Outstanding at end of year (in US dollars per share)																						$ 29.88	$ 26.16	$ 20.30
Exercisable at end of year (in US dollars per share)																						$ 21.19	$ 19.82	$ 16.03
Options, exercise price range, lower range limit												$ 14.09	90.83	$ 14.09	90.83	$ 15.23	98.63	$ 2.23
Options, exercise price range, upper range limit												$ 16.24	104.64	$ 16.24	104.64	$ 22.35	129.63	$ 16.28	102.00
Options, exercise price			$ 34.68	202.10			$ 23.13	137.40												202.10	224.53
Options granted to Americans, exercise price					$ 31.4	192.90
Options granted to non-Americans, exercise price					$ 31.06	185.20
Award vesting rights			can be exercised one fourth at a time, after the first 18, 36, 48 and 60 months from the grant date	can be exercised one fourth at a time, after the first 18, 36, 48 and 60 months from the grant date	may be exercised one fifth each year beginning 12 months after they were granted	may be exercised one fifth each year beginning 12 months after they were granted	may be exercised one third after 12 or 15 months	may be exercised one third after 12 or 15 months				may be exercised one third each year beginning 12 months after they were granted	may be exercised one third each year beginning 12 months after they were granted	may be exercised one third each year beginning 12 months after they were granted	may be exercised one third each year beginning 12 months after they were granted	could be exercised one third each year beginning 12 months after they were granted	could be exercised one third each year beginning 12 months after they were granted	could be exercised one third each year beginning 12 months after they were granted	could be exercised one third each year beginning 12 months after they were granted
Weighted average grant-date fair value of options granted (in US dollars per share)									$ 7.06	$ 7.07	$ 8.96
Unrecognized compensation costs relating to non-vested options granted under the Options Schemes									11	20
Future amortization of unrecognized compensation costs relating to non-vested options [Abstract]
2013									6
2014									3
2015									2
Options, weighted average remaining contractual life									39 months	45 months
Options, weighted average fair value (in US dollars per share)									$ 7.75	$ 11.20
Total intrinsic value of options exercised									40	32	22
Intrinsic value of options fully vested but not exercised									$ 18
Average remaining term of options fully vested but not exercised									24 months