Anti rotational device for down hole hydraulic pumping unit

Apparatus and method for axially displacing a downhole tool...

Apparatus for axially displacing a downhole tool or a tubing str

Apparatus for carrying tool on coil tubing with shifting sub

Apparatus for sonically extracting oil well liners

Apparatus for treating or completing wells

Apparatus for treating wells

Coil tubing fluid power actuating tool

Dual cylinder lift pump system and method

Electromagnetic coupling

Electromechanical shifter apparatus for subsurface well flow con

Hydraulic pump jack drive system for reciprocating an oil well p

Hydraulic well control system

Jar enhancer

Mechanical latching device operated by dead weight and tension

Mechanical latching device operated by dead weight and tension

Metal to metal seal for well safety valve

Method and system for wellbore communication

Parallel tubing system for pumping well fluids

Polished rod for oil well pumping