Tubing hanger and adapter assembly

Ultrasonic energy producing device for an oil well

Underground well electrical cable transition with seals and...

Underground well electrical cable transition, seal and method

Utilization of energy from flowing fluids

Utilization of energy from flowing fluids

Valve and position control using magnetorheological fluids

Valve and position control using magnetorheological fluids

Valve apparatus

Valve latch device for drilling fluid telemetry systems

Water well including a pump

Well bore barrier penetrator arrangement and method for multiple

Well installation in which electrical current is supplied for a

Well logging apparatus and method for making same

Well logging tool

Well probe able to be uncoupled from a rigid coupling connecting

Well testing apparatus

Wellbore cleaning tool and method

Wellbore flow control device

Wellbore formation evaluation system and method