77711043
Apr 9, 2009
Nov 16, 2010
drilling machines and parts therefor used for oil and gas drilling and production; parts for oil and gas drilling and production machines, namely, centralizers, casing shoes, reaming tools, float shoes, rotating and non-rotating drill pipe protectors, screens, clamps, stop collars, cuttings bed impellers, torque reduction subs, casing and casing attachments, drilling bits, drilling fluid and mud agitators, and cement flow controllers
Machinery