A closed oil liquid ring gas compression system with a...

A coal and rock cutting pick

A collecting device and a method of using same

A collection device and method of using same

A collector device for drilling fluid

A completion method for horizontal wells in in situ combustion

A component used in the formation, construction, repair and...

A connection arrangement for a two-piece annular body

A connection rod for rock drilling and a method of producing...

A connector

A connector for use in a wellbore

A continuous rod pump drive system

A controller for a downhole apparatus

A controller for a downhole tool

A coring tubular and method for reducing contamination and...

A corrugated settling cup and a multi-cup uniform flux gas...

A cutter for a boring head, a device for accommodating...

A cutter head containing its motors and gearcase

A cutter head, boring jig and device and process for sea...

A cutter, a stopper means and a method of preventing mud...