Full flow solenoid valve for air gun operation
Fuse cord
Gas gun assembly
Gas-gun for acoustic well sounding
Gas-gun for acoustic well sounding
Generating pulses
Generation of seismic sources
Geophone implanting and positioning apparatus
Geophone including laser interferometer
Geophone noise reduction method
Gerotor and bearing system for whirling mass orbital vibrator
Gyroscopic vibrator
High amplitude sound wave generator
High frequency gas detonator
High frequency reaction mass and hydraulic cylinder assembly
High pressure sealing apparatus
High speed seismic gas exploder and method of operation
Horizontally polarized shear-wave vibrator seismic source
Human-portable geophysical energy source
Hydraulic release system for use in a borehole apparatus