Safety device for use on drilling rigs and process of running la

Selective apparatus and method for removing an undesirable cut f

Self positioning dust seal holder

Self-propelled saverdrill

Separation of evolved gases from drilling fluids in a...

Separation of evolved gases from drilling fluids in a...

Slurry diverter

Soil sampler

Solids strainer system for a hydraulic choke

Subsea mud pump and control system

Suction attachment for a drilling tool

Suction drill unit for dowel anchorage in rock

Suction tool

Surge device for air drilling

Swivel chamber for water actuated wireline drills

System for adapting top head drilling rigs for reverse circulati