Electrical connector for borehole telemetry apparatus

Electrical imaging in conductive and non-conductive mud

Electrical logging of a laminated earth formation

Electrical logging sensor and its method of manufacture

Electrical logging system

Electrical measurement apparatus and method for measuring an...

Electrical power cable underground-laying depth measuring...

Electrical power supply arrangement for a downhole...

Electrical power supply for the electronic equipments of an...

Electrical surveillance apparatus with moveable antenna...

Electrical well logging interpretation

Electrically actuated time delay device

Electro-magnetic well logging

Electro-optical monitoring system

Electroacoustic pulse-source for high resolution seismic...

Electrochemical sensor

Electrode and assembly for induced-polarization prospecting

Electrode configurations for suppression of electroseismic...

Electrode device for protecting and supporting an electrode...

Electrode structure to measure borehole resistivity