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Inventories
12 Months Ended
Dec. 31, 2011
Inventories [Abstract]  
Inventories

2.     Inventories

Inventories consisted of the following items at December 31:

 

 

                 
    2011     2010  
    (In thousands)  

Raw materials and components:

               

Drilling fluids

  $ 174,659     $ 122,490  

Mats

    623       359  
   

 

 

   

 

 

 

Total raw materials and components

    175,282       122,849  

Finished goods- mats

    647       179  
   

 

 

   

 

 

 

Total

  $ 175,929     $ 123,028