Inventories (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following:

(In thousands)	June 30, 2016		December 31, 2015
Raw materials:
Drilling fluids	$	116,651	$	133,934
Mats	1,376		657
Total raw materials	118,027		134,591
Blended drilling fluids components	24,270		25,343
Finished goods - mats	2,579		3,723
Total inventory	$	144,876	$	163,657