Electro hydraulic downhole control device

Electro thermal energy storage for in situ recovery of fluid...

Electro-hydraulic surface controlled subsurface safety valve...

Electro-hydraulic well tool actuator

Electro-hydraulically controlled perforator

Electro-hydraulically controlled tractor

Electro-hydraulically pressurized downhole valve actuator

Electro-mechanical thruster

Electro-mechanical wireline anchoring system

Electro-optic cablehead for oil well applications

Electro-osmotic production of hydrocarbons utilizing...

Electro-thermal process for production of off shore oil...

Electroacoustic method and device for stimulation of mass...

Electrochemical process for effecting redox-enhanced oil...

Electrode device for electrically heating underground...

Electrode supporting conduit tube for electrical heating of...

Electrode unit for electrically heating underground...

Electrode well for electrically heating a subterranean...

Electromagnetic borehole surveying method

Electromagnetic borehole telemetry system incorporating a...