Fluid actuated acoustic pulse generator

Fluid operated seismic generator

Fluidic repeater

Full flow solenoid valve for air gun operation

Full flow solenoid valve for air gun operation

Fuse cord

Gas gun assembly

Generating pulses

Generation of seismic sources

Gerotor and bearing system for whirling mass orbital vibrator

Gyroscopic vibrator

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 slotted cylinder source

Hydraulic stabilization system to position and isolate a seismic

Hydraulic synchronizing system for coordinating movement of the