REVENUES (Tables)

6 Months Ended

Jun. 30, 2019

REVENUES

Schedule of disaggregation of revenues

	Three months ended				Six months ended
	June 30,				June 30,
(in thousands)	2019		2018		2019		2018
Oilfield services transferred at a point in time	$	—	$	—	$	—	$	—
Oilfield services transferred over time		358,516		467,926		693,172		904,260
Total revenues	$	358,516	$	467,926	$	693,172	$	904,260

Schedule of contract assets included in accounts receivable

	June 30,		December 31,		June 30,		December 31,
(in thousands)	2019		2018		2018		2017
Unbilled trade receivables	$	95,898	$	56,408	$	113,453	$	68,494