GRIFFITH

Drilling tools-- namely, shock tools, fishing bumper subs, jar accelerators, combination drilling jars, fishing jars, hydraulic mechanical jars, rib stabilizers, reamers, kelly valves, cubing safety valves, kelly cocks, inside blow-out preventers and stabbing valves, break-out machines, blow-out preventers, stabilizers, rig levelling jacks, sheave units, drill collar handling systems and single joint elevators