Property, Plant and Equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment

Property, Plant and Equipment

Note 8 Property, Plant and Equipment

The major components of our property, plant and equipment are as follows:

	December 31,
	2020		2019
	(In thousands)
Land	$	28,261	$	33,931
Buildings		141,365		132,603
Drilling rigs and related equipment		12,487,961		12,948,504
Oilfield hauling and mobile equipment		259,150		270,826
Other machinery and equipment		195,903		192,081
Oil and gas properties		—		12,286
Construction-in-process (1)		—		25,391
	$	13,112,640	$	13,615,622
Less: accumulated depreciation and amortization		(9,126,933)		(8,685,073)
	$	3,985,707	$	4,930,549

(1) Relates primarily to amounts capitalized for new or substantially new drilling rigs and related equipment that were under construction and had not yet been placed in service as of December 31, 2019.

Depreciation expense included in depreciation and amortization expense in our consolidated statements of income (loss) totaled $851.8 million, $869.6 million and $860.6 million during 2020, 2019 and 2018, respectively.

Repair and maintenance expense included in direct costs in our consolidated statements of income (loss) totaled $154.2 million, $248.6 million and $265.6 million during 2020, 2019 and 2018, respectively.

Interest costs of $0.7 million, $1.5 million and $1.0 million were capitalized during 2020, 2019 and 2018, respectively.