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...

Electromagnetic borehole telemetry system incorporating a...

Electromagnetic energy assisted drilling system and method

Electromagnetic gap sub assembly

Electromagnetic reservoir heating with vertical well supply...

Electromagnetic resistivity tool and method for use of same

Electromagnetic telemetry assembly with protected antenna

Electromagnetic wave resistivity tool with tilted antenna

Electromagnetically determining the relative location of a...

Electronic core orientation device

Electronic id tag and co-operating antenna

Electronic system for monitoring drilling conditions...