Magnetic suspension seismometer

Mapping reservoir characteristics using earth's...

Marine acoustic pulse train signal generator

Marine gas exploder

Marine seismic acquisition method and apparatus

Marine seismic source array

Marine seismic transducer

Marine seismic vibrator having support structure including vibra

Marine shear wave vibrator

Marine vibrator

Mass oscillator having an adjustable gas spring

Mass retrieval for acoustic pulse generator

Means for flexibly guiding the travel of an upwardly propelled w

Means for seismic prospecting from bulk liquid carriers

Measurement of stand-off distance and drilling fluid sound speed

Measuring device for a seismic profile within a well-bore

Measuring device for measuring the elastic properties of a...

Mechanical filter

Method and apparatus for absorbing acoustic energy

Method and apparatus for absorbing acoustic energy