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REVENUES (Tables) | 6 Months Ended
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Jun. 30, 2018
REVENUES |
Schedule of disaggregation of revenues |
|  | Three months ended |  |  | Six months ended |
|  | June 30, |  |  | June 30, |
(in thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Oilfield services transferred at a point in time |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Oilfield services transferred over time |  |  | 467,926 |  |  |  | 398,810 |  |  |  | 904,260 |  |  |  | 696,929 |
Total revenues |  | $ | 467,926 |  |  | $ | 398,810 |  |  | $ | 904,260 |  |  | $ | 696,929 |
Schedule of contract assets included in accounts receivable |
(in thousands) |  | June 30, 2018 |  |  | December 31, 2017 |  |  | June 30, 2017 |  |  | December 31, 2016 |
Unbilled trade receivables |  | $ | 113,453 |  |  | $ | 68,494 |  |  | $ | 82,466 |  |  | $ | 39,223 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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