Electronic metal detector return signal phase changer

Electronic water line tracer

Electroseismic prospecting by detection of an electromagnetic si

Electroseismic technique for measuring the properties of...

Elimination of the anisotropy effect in LWD azimuthal...

Emitter for an electromagnetic tomography measurement system whi

Enhanced detection method

Enhanced passive ranging methodology for well twinning

Enhanced peak detector

Enhanced wide aperture groove for antenna of downhole resistivit

Error correction and calibration of a deep reading...

Extended range, pulsed induction logging tool and method of use

Extension assembly for an electromagnetic antenna and method...

Externally guided and directed field induction resistivity tool

Externally guided and directed field induction resistivity tool

Externally guided and directed field induction resistivity tool

Externally guided and directed halbach array field induction...

Extra bucking coils to balance induction arrays