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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consisted of the following:
(In thousands)June 30, 2020December 31, 2019
Raw materials:  
Fluids systems$118,684  $141,314  
Mats and integrated services3,982  5,049  
Total raw materials122,666  146,363  
Blended fluids systems components35,042  39,542  
Finished goods - mats20,265  10,992  
Total inventories$177,973  $196,897