Segment Information QES currently has four reportable segments: Directional Drilling, Pressure Pumping, Pressure Control and Wireline. These segments have been selected based on the Companys CODM assessment of resource allocation and performance. The Company considers its Chief Executive Officer to be its CODM. The CODM evaluates the performance of our segments based on revenue and income measures, which include Adjusted EBITDA. Directional Drilling Our Directional Drilling segment is comprised of directional drilling services, downhole navigational and rental tools businesses and support services, including well planning and site supervision, which assists customers in the drilling and placement of complex directional and horizontal wellbores. This segment utilizes its fleet of in-house positive pulse measurement-while-drilling navigational tools, mud motors and ancillary downhole tools, as well as electromagnetic navigational systems. The demand for these services tends to be influenced primarily by customer drilling-related activity levels. We provide directional drilling and associated services to E&amp;P companies in many of the most active areas of onshore oil and natural gas development in the United States, including the Permian Basin, Eagle Ford Shale, Mid-Continent region, Marcellus/Utica Shale and DJ/Powder River Basin. Pressure Pumping Our Pressure Pumping segment provides hydraulic fracturing stimulation services, cementing services and acidizing services. The majority of the revenues generated in this segment are derived from pressure pumping services focused on fracturing, cementing and acidizing services in the Permian Basin, Mid-Continent region and the DJ/Powder River Basin. These pressure pumping and stimulation services are primarily used in the completion, production and maintenance of oil and gas wells. Customers for this segment include large public E&amp;P operators as well as independent oil and gas producers. Pressure Control Our Pressure Control segment supplies a wide variety of equipment, services and expertise in support of completion and workover operations throughout the United States. Its capabilities include coiled tubing, snubbing, fluid pumping, nitrogen, well control and other pressure control related services. Our Pressure Control equipment is tailored to the unconventional resources market with the ability to operate under high pressures without having to delay or cease production during completion operations. We provide our pressure control services primarily in the Mid-Continent region, Eagle Ford Shale, Permian Basin, DJ/Powder River Basin, Haynesville Shale and East Texas Basin. Wireline Our Wireline segment provides new well wireline conveyed tight-shale reservoir perforating services across many of the major U.S. shale basins and also offers a range of services such as cased-hole investigation and production logging services, conventional wireline, mechanical services and pipe recovery services. These services are offered in both new well completions and for remedial work. The majority of the revenues generated in our Wireline segment are derived from the Permian Basin, Eagle Ford Shale, Mid-Continent region (including the SCOOP/STACK), Haynesville Shale and East Texas Basin as well as in industrial and petrochemical facilities. Segment Adjusted EBITDA The Company views Adjusted EBITDA as an important indicator of segment performance. The Company defines Segment Adjusted EBITDA as net income (loss) plus income taxes, net interest expense, depreciation and amortization, impairment charges, net (gain) loss on disposition of assets - excluding (gain) loss of lost in hole assets, stock based compensation, transaction expenses, rebranding expenses, settlement expenses, restructuring expenses, impairment expenses, severance expenses and equipment stand-up expense. The CODM uses Segment Adjusted EBITDA as the primary measure of segment operating performance. The following table presents a reconciliation of Segment Adjusted EBITDA to net (loss) income ( in thousands of U.S. dollars ): Year Ended December 31, 2019 2018 2017 Segment Adjusted EBITDA: Directional Drilling $ 34,093 $ 23,694 $ 17,498 Pressure Pumping (5,053 ) 28,700 27,784 Pressure Control 10,958 18,389 6,539 Wireline (1,122 ) 1,362 (1,794 ) Corporate and Other (21,454 ) (33,573 ) (17,459 ) Impairment and other charges (41,559 )   Income tax expense (444 ) (621 ) (91 ) Interest expense (3,213 ) (11,825 ) (11,251 ) Depreciation and amortization (49,519 ) (46,683 ) (45,687 ) Gain on disposition of assets 1,914 2,375 2,639 Other (expense) income (37 )  666 Net loss $ (75,436 ) $ (18,182 ) $ (21,156 ) Financial information related to the Companys total assets position as of December 31, 2019 and December 31, 2018 , by segment, is as follows ( in thousands of U.S. dollars ): December 31, 2019 December 31, 2018 Directional Drilling $ 99,456 $ 96,942 Pressure Pumping 45,875 121,824 Pressure Control 67,685 70,401 Wireline 21,304 28,039 Total $ 234,320 $ 317,206 Corporate &amp; Other 6,209 7,343 Total assets $ 240,529 $ 324,549 Year Ended December 31, 2019 Directional Drilling Pressure Pumping Pressure Control Wireline Total Revenues $ 227,949 $ 90,185 $ 106,594 $ 59,555 $ 484,283 Depreciation and amortization $ 12,509 $ 20,370 $ 12,662 $ 3,978 $ 49,519 Capital expenditures $ 14,966 $ 5,208 $ 13,170 $ 1,903 $ 35,247 Year Ended December 31, 2018 Directional Drilling Pressure Pumping Pressure Control Wireline Total Revenues $ 192,491 $ 214,154 $ 122,620 $ 75,089 $ 604,354 Depreciation and amortization $ 10,849 $ 22,571 $ 9,207 $ 4,056 $ 46,683 Capital expenditures $ 13,003 $ 29,235 $ 20,125 $ 2,594 $ 64,957 Year Ended December 31, 2017 Directional Drilling Pressure Pumping Pressure Control Wireline Total Revenues $ 145,230 $ 153,118 $ 89,912 $ 49,773 $ 438,033 Depreciation and amortization $ 11,994 $ 22,867 $ 6,560 $ 4,266 $ 45,687 Capital expenditures $ 9,038 $ 5,268 $ 6,446 $ 492 $ 21,244