REVENUES (Tables)

3 Months Ended

Mar. 31, 2019

REVENUES

Schedule of disaggregation of revenues

	Three months ended
	March 31,
(in thousands)	2019		2018
Oilfield services transferred at a point in time	$	-	$	-
Oilfield services transferred over time		334,656		436,334
Total revenues	$	334,656	$	436,334

Schedule of contract assets included in accounts receivable

(in thousands)	March 31, 2019		December 31, 2018		March 31, 2018		December 31, 2017
Unbilled trade receivables	$	90,539	$	56,408	$	79,688	$	68,494