Earth formation and fluid material investigation by nuclear...

Earth formation porosity log using measurement of fast...

Earth formation salinity by comparison of inelastic and...

Earth holography with special reference wave

Earthquake early warning equipment

Earthquake sensor

Earthquake simulator

Eas ready paperboard

Eccentric nmr well logging apparatus and method

Echographic technique-based method and apparatus to detect...

Echometry device and method

Efficient processing of nmr echo trains

Efficient seismic data acquisition with source separation

Efficient simultaneous electromagnetic transmission or...

Elastic wave sensor device electrically compensated for tilt...

Elastomer pad for vibrator seismic source

Electric field sensor for marine environments

Electric logging method

Electric well logging apparatus

Electrical cased well-logging method