REVENUES (Tables)

6 Months Ended

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