Air-coupled seismic detector

Air-gun fire time sensor

Airgun apparatus providing high strength and high pressure capab

Alignment restoration means for use in seismic apparatus

Amphibious seismic source

Anti-bounce device for a mass striking a target element

Anti-bounce device for a mass striking a target element

Anti-bounce device for preventing the multiple shocks of a movin

Apparatus and method for attenuating tube waves in a borehole

Apparatus and method for detecting seismic waves in a borehole u

Apparatus and method for determining the quality of clamping of

Apparatus and method for eliminating electrical noise in the...

Apparatus and method for generating a seismic source signal

Apparatus and method for generating a seismic source signal

Apparatus and method for illuminating 3-D geologic targets with

Apparatus and method for investigating wellbores and the like

Apparatus and method for the acquisition of seismic data

Apparatus and method for the acquisition of seismic data

Apparatus and seismic method

Apparatus for attenuating Stoneley waves in a borehole