Exhibit 3.249

(Garuda) The Department of Business Development Serial No. 1-1004-53-4-042239 Issued on this day the 28 September 2010. (TRANSLATION) Form Bor Or Jor. 2 Certify true copy - signature - MEMORANDUM OF ASSOCIATION of _________________ Ensco_{Thailand) Limited _______ . _______________ _ Registration No. BorKor. __ 0104553118091 (Miss Thida Piriyawongsakom) Registrar This Memorandum of Association of the Company is made on ____ 22 September 2010 _, with the following particulars: Clause 1 The name of the Company is" ...... Borisat Ensco.(Pratedthai) Charnkad ------···-----------------··----·--------"· The Romanized name is·---·-------··-·-Ensco(Thailand).Limited __ .. _. ______ . _____ . _________ . __ . ______ ._. ________ ........ _____ . __ ..... ______________ _ Clause 2 The Company's office shall be located at ______ J?.@gk_9J(!\.1~:t:J..QP.QU~ .. -·-----·····--·-··------·---··----·------·----···· Clause 3 The objectives of the Company include_ ... _ 15 _____ items, as appear in Form Wor. attached hereto. Clause 4 The liability of the Company's shareholders is limited to an amount not exceeding the unpaid amount on the shares held by each. - ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------· (If the directors of the Company are to have unlimited liability, such liability should be stated. If they are not, please insert"·-·".) Clause 5 The Company's authorized capital is Baht __ One Hundred Thousand __ {__100,000 _ _), and is divided into __ J)n.'..1]w.lJ~IJmLLJ_9.,_QQ9.. ____ _) shares, each of which has a par value ofBaht _____ .J):m_ .. ____ (.___J_Q .... J. Clause 6 The names, residences, occupations, and signatures of, and the number of shares subscribed by, the __ .. _._3 ______ promoters are as follows: (1) ____ _Mw_._i::!wJiY..?_Cli.Qt~1m1..RliJ!t1J!;.IJ _______ .... __________________ Age __ A·.4 .. _. (in years), Telephone No. ____________ _ Address:_ No._ 80 Tedsabanrangraktai Road, Khwaeng Ladyao.,_Khet Jatuchak, Ban_g_kok Metropolis----·--··----·----------··-·-·-------· Occupation -······---Ewp!9y~J:;.---------·--has subscribed to ___ J_. __ share(s). (Signed) ... _.:-;._igp_?IDJ.~: ... ____________ .... __ _ (2) ... JY.lJ.~--NlJ!lt?YM_~~-N.j!l;9mp_Imn. __ ._. ____________ .. _ ... _______ Age .. J_i ____ (in years), Telephone No. ____________ _ Address:_No. 89/302.Tedsabansongkhro Road, Khwaeng_Lady_ao, Khet Jatuchak, Ban_gkok Metropolis -------·-·····-----------·-·---· Occupation __________ EWPl9.Y~x. _____ . _____ has subscribed to ___ J ____ share(s). (Signed) ____ _:-_s_igp.?t~J.~:-----··------------··· (3) ____ MJ;;.~.l?..Q.R~P..?Ji~Hgr?l?m~-·-·········--·--------·····--------- Age .. .?--7 ____ (in years), Telephone No. ____________ _ Address:_No. 237/92_Soi.Paholyothin_32, Khwaeng Senanikom,_Khet Jatuchak, Ban_gkok Metropolis··----------·····-------------··---· Occupation ·--·--····Ew11!9y~J:;.-------·---·has subscribed to ___ J ____ share(s). (Signed) ... _ _:-_s_igp_?W.rn: ______ ·----··--·-----· ( 4) ·--------------------------···--·-----------····-··-------·Age _________ (in years), Telephone No. __________________ . _______ _ Address: _____ ··-··---------------------···--·····-·---------------·----···-··------------·-·---···-----------------···--------··-··-----------···---------······ Occupation ·-··-·----------------·-········-··has subscribed to·----·-· share(s). (Signed)·----------·-----------··------------··· (5) ·------------··-··------------------------··--------------·Age _________ (in years), Telephone No. __________________________ _ Address:·--·-----------·--------·--·-------------------------·-····--·------------········-----------···-·-·····-·----------··---------·---···-----------···---· Occupation ·---------------------··--····-··--has subscribed to····---· share(s). (Signed)·----·······------·---··----------······ (6) ···-··-----···---·-··----------·--------------------------·Age _________ (in years), Telephone No. __________________________ _ Address: _______________ ·---·---··--------------------·--·-----···-----------------·····-------------···········-------------·-·-·----------···-------··--··-·--· Occupation ·--------------------·-·-----------has subscribed to·------· share(s). (Signed) ____ ··-·---------·····-----------····--· (7) ·······-·-·---------····------····-··--------------······-·Age---··---· (in years), Telephone No. __________________________ _ Address: _________________ ·······------------------····-···----·--------------·--··---------·-·-······----------------·--·-----------····---------······--------· Occupation --------··-·--··----·--------------has subscribed to ________ share(s). (Signed)·-----------···-----------··--·--------· All promoters agree that this Memorandum of Association shall become invalid if the incorporation of the Company is not registered within 10 years from the date ofregistration hereof. · -seal- (Signed).·-----------··-·-:~Jgnll,.tlJr~----·-··--------------Promoter/Director Requesting Registration ( Mr. Derek Andrew Sangster __ ._) Page ________ J_··-····of __________ i ________ pages (Signed) ________ . __ . __ :~um~:!w-:<e: _________ ... __ Registrar Ancillary document accompanying Application No. --~~ljJQ9,_'.f_7.:-:42_ CM.r,_.Sm:ll.Ql11JJJ::;.b11}Jt.1,1rn.WQl)_g _ _) We, the promoters, whose signatures are appended above, agree that the Registrar may examine the accuracy of the personal information contained in the foregoing particulars.

(Garuda) The Department of Business Development Serial No. 1-1004-53-4-042239 Issued on this day the 28 September 2010. Form Bor Or Jor. 2 CERTIFICATION OF SIGNATURES BY WITNESSES Certify true copy - signature - (Miss Thida Piriyawongsakom) Registrar I, .......... JY1rn ... R\l.Y~.<'t:WJ!!l.MWgm.Q.!1!£l:t.!!L .................. , Age .... J.~ .. years, Telephone No ... .Q7.:9..JQ::-2Q9.9 ..... . 0 holding National Identification Card No. [II -I 1 I O I 1 I 2 I -I O ! 3 I O ! 6 I 3 ! -[IO] - ITJ □ holding other card (specify) ................................................ No ........................................................ . Residing at ......... 9.9.9 ........ Moo ....... : ........... Road ........... J{~1J.m.W ................ Khwaeng .......... S.i_l_Qm. ................ . Khet .................. Ban_grak .......................... Province ........... Bangkok.Metropolis ................................. . I, ........... MrA-.M.l!J~.<'trnt1)tJW.Yf!ti.15:.9m. ....................... , Age ... A'.? ..... years, Telephone No ... Q'.?.:9.~2:7-9.9.Q ... . 0 holding National Identification Card No. [II -l 1 l o l 1 I 7 l -l o l 2 l 1 l 2 l 6 I -[TIII -ITI □ holding other card (specify) ................................................ No ........................................................ . Residing at ......... 9.9.9 ........ Moo ..... : ........... Road .............. R.\l.m~_I.Y. .............. Khwaeng .......... S.i_l_Qm. ................ . Khet .................. Ban_grak ............. Province ........... Ban_g_kok Metropolis ................................. . HEREBY CERTIFY that all the promoters of the Company have set their hands before me. -seal- (Signed) ......................... -signature- ....................... Witness ( ......... Mrs. Raveewan.Min_gmontchai ......... ) (Signed) ......................... -signature- ....................... Witness L ...... Mrs. Maleerat Tathayatikom ........... J DUTY STAMP Baht200.00 To be Affixed (Signed} ................... :~ign!1!J.!I!i: .................. Promoter/Director Requesting Registration (__Mr .. Derek Andrew Sangster ... J Page ..... .7-....... o:t: ...... 2 ...... Pages ................. Ensco.(Thailand} Limited ............. . Ancillary document accompanying Application No ... &1~.~.Q9.7.7::-.49.. (Signed) .................. :~JglJAtiJri:.: .................. Registrar (_ Mr .. Somchai Chantarawong_)

(Garuda) The Department of Business Development Serial No. 1-1004-53-4-042239 Issued on this day the 28 September 2010. Form Wor. (TRANSLATION) OBJECTIVES IN DETAIL of Certify true copy - signature - (Miss Thida Piriyawongsakom) Registrar ................... Ensco(Thailand) Limited ............... . Registration No .... Ql.0.4.5.5.~.tUrn9.l ........... . The objectives of this partnership/company are ..... 15 ....... in number as follows: (1) To carry on the business of services and provision of support in relation to petroleum exploration and production, including oil and gas well drilling services as well as construction works, repair and maintenance, consultation in relation to petroleum wells, facilities and petroleum exploration and production. (2) To buy, obtain, own, possess, rent, buy on hire-purchase, import, export, sell, let, lease and sell on hire­ purchase machinery, equipment and devices in relation to petroleum exploration and production, oil and gas well drilling, including consultation, advice, installation, repair and maintenance service of such machinery, equipment and devices. (3) To buy, obtain, own, charter and operate all kinds of vessels, specifically including but not limited to mobile offshore drilling units, for the purpose of conducting services in accordance with the Company's objectives and for transportation of machinery, equipment, spare-parts, vessel personnel, engineers and crews as well as for accommodation of the vessels' crews. (4) To carry on the business of bidding for sale of goods, provision of services or hire of work in accordance with the Company's objectives, for any person, body of persons, juristic person, government agency and/or state enterprise. (5) To buy, obtain, receive, rent, buy on hire-purchase, own, possess, improve, use or otherwise manage any property whatsoever as well as the fruits thereof, except for exploiting benefits from land. (6) To sell, transfer, mortgage, pledge, exchange or otherwise dispose of any property, except for exploiting benefits from land and other natural resources and internal trade relating to indigenous agricultural produces. (7) To borrow money, overdraw from accounts with banks, juristic persons or other finance institutions; to give commercial credit; to accept, issue, transfer or endorse bills of exchange or other negotiable instruments, except banking business, finance business and credit foncier business. (8) To contact public bodies and officials to acquire or dispose of privileges, agreements, rights, titles, permits, rights over trade marks, industrial property, copyrights, patents, concessions or any special rights that are necessary for the operation of the Company. -seal- (Signed} ................. :~Jgn~j:J.!rn.: .................. Promoter/Director Requesting Registration C..Mr .. Derek Andrew Sangster ... .) Page ...... L ..... o( ...... 2 ...... pages (Signed) ................... :~_ign~ilJrn: ................ Registrar Ancillary document accompanying Application No .. 84530927-49 C.. Mr. Somchai Chantarawong .... ) If any objective is required by Jaw to obtain official approval, the juristic person must apply for such approval in accordance with the governing Jaw BKKDMS· 188430·v2·Ensco _(App _lnco·Eng)_ Tus,DOC

(Garuda) The Department ofBusiness Development Serial No. 1-1004-53-4-042239 Issued on this day the 28 September 2010. Form Wor. (TRANSLATION) OBJECTIVES IN DETAIL of Certify true copy - signature - (Miss Thida Piriyawongsakom) Registrar ___________________ Ensco{Thailand)Limited _______________ _ Registration No. ___ QH)_4J~1U~Q9.L _________ _ The objectives of this partnership/company are _____ 15 _______ in number as follows: (9) To file applications, hold permits and any registrations necessary or beneficial to the activities of the Company. (10) To establish branch offices or appoint agents within or outside the country. (11) To become a partner with limited liability in a limited partnership, or a shareholder in a private company and a public company. (12) To guarantee natural persons or juristic persons, and persons involved with the business operations of the Company, under immigration, taxation, customs, labour and other laws. (13) To carry on the business of purchase, import and export for distribution abroad of all kinds of goods. (14) To carry on the business as a broker or agent for trading in or for procurement of goods or services necessary for production or provision of services by affiliated enterprises. (15) The Company is entitled to issue shares at a price higher than par value. -seal- (Signed). _________________ :§Jfil!!cit.l-m~.: __________________ Promoter/Director Requesting Registration (___Mr._Derek Andrew Sangster __ _) Page ______ '.f _______ o:(_ _____ .f ______ pages (Signed) ___________________ :§_ign!cl1t-Jr~:---- ____________ Registrar Ancillary document accompanying Application No .. 84530927-49 (___ Mr. Somchai Chantarawong ____ ) If any objective is required by law to obtain official approval, the juristic person must apply for such approval in accordance with the governing law BKK.DMS-188430·v2-Ensco_(App_Inco-Eng)_Tus.DOC