Adjustable kelly bushing for downhole drilling system

Anchor and method of setting anchor

Anchoring bolt and method

Apparatus for connecting motors in tandem

Apparatus for establishing an anchor

Apparatus for handling pipe at well site

Apparatus for handling pipe at well site

Apparatus for racking drill pipes on floater type platforms

Apparatus for supporting a drilling platform on the ocean floor

Automatic sequential dual action sealing system

Bit retention device for a bit and chuck assembly of a down-the-

Bit retention system

Bit retention system

Compensation device for insertion in a drill string for deep-wel

Compression shock absorber device

Derrick mounted apparatus for the manipulation of pipe

Device for handling and racking riser pipes and drill pipes

Double acting mechanical jar

Drill bit stabilizer device

Drill string jar apparatus