Revenues (Tables)

12 Months Ended

Dec. 31, 2021

Revenues.

Schedule of disaggregation of revenues

(in thousands)	2021		2020		2019
Oilfield services transferred at a point in time	$	—	$	—	$	—
Oilfield services transferred over time		864,929		598,302		1,222,409
Total revenues	$	864,929	$	598,302	$	1,222,409

Schedule of contract assets included in accounts receivable

(in thousands)	2021		2020
Unbilled trade receivables	$	70,353	$	29,574