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Business Segment Information (Tables)
12 Months Ended
Dec. 31, 2018
Business Segment Information  
Schedule of operating segment revenues by major service lines
(in thousands) 2018  2017  2016 
Technical Services:            
Pressure Pumping $945,919  $993,538  $336,550 
Downhole Tools  423,811   294,606   169,754 
Coiled Tubing  100,049   109,462   70,511 
Nitrogen  49,198   38,961   37,172 
Snubbing  17,818   23,838   18,903 
All other  110,418   77,946   46,764 
Total Technical Services $1,647,213  $1,538,351  $679,654 
             
Support Services:            
Rental Tools $50,809  $30,264  $21,443 
All other  22,983   26,612   27,877 
Total Support Services $73,792  $56,876  $49,320 
             
Total Revenues $1,721,005  $1,595,227  $728,974 
Schedule of summarized financial information concerning reportable segments
(in thousands) Technical
Services
  Support
Services
  Corporate  Gain (loss) on 
disposition of
assets, net
  Total 
2018                    
Revenues $1,647,213  $73,792  $  $  $1,721,005 
Operating profit (loss)  216,703   4,612   (14,629)  3,344   210,030 
Capital expenditures  230,262   10,364   1,984      242,610 
Depreciation and amortization  150,508   12,174   438      163,120 
Identifiable assets  925,305   78,413   195,862      1,199,580 
2017                    
Revenues $1,538,351  $56,876  $  $  $1,595,227 
Operating (loss) profit  251,476   (12,228)  (17,561)  4,530   226,217 
Capital expenditures  106,131   9,949   1,429      117,509 
Depreciation and amortization  145,507   17,570   460      163,537 
Identifiable assets  896,803   75,568   174,853      1,147,224 
2016                    
Revenues $679,654  $49,320  $  $  $728,974 
Operating loss  (203,804)  (26,021)  (17,037)  7,920   (238,942)
Capital expenditures  28,380   2,928   2,630      33,938 
Depreciation and amortization  191,181   25,606   471      217,258 
Identifiable assets  733,008   76,876   225,568      1,035,452 
Schedule of revenues are presented based on the location of the use of the product or service
Years ended December 31, 2018  2017  2016 
(in thousands)         
United States Revenues $1,630,569  $1,539,462  $677,755 
International Revenues  90,436   55,765   51,219 
  $1,721,005  $1,595,227  $728,974