Land seismic gas detonator

Large diameter borehole apparatus

Lift and isolation system for seismic vibrator

Lightweight inflatable borehole receiver unit for seismic...

Liquid slug projector apparatus

Locking arm for well tool

Logging method and apparatus using a sonde equipped with measuri

Logging method and apparatus using a sonde equipped with measuri

Logging method and device in well bores utilizing directional em

Logging tool housing with acoustic delay

Low energy source for seismic operation

Low frequency acoustic attenuator

Low frequency acoustic attenuator for use in downhole...

Low frequency flextensional acoustic source for underwater use

Low frequency flextensional acoustic source for underwater use

Low impedance down-hole acoustic source for well logging

Magnetic suspension seismometer

Mapping reservoir characteristics using earth's...

Marine acoustic pulse train signal generator

Marine gas exploder