Accelerated weight drop configurable for use as a shear wave...

Accelerated weight drop configurable for use as a shear wave...

Accelerated weight drop for use as a seismic energy source...

Accelerated weight drop for use as a seismic energy source...

Acoustic generator for distance sounding with a firing...

Acoustic impulse generator

Acoustic impulse generator

Acoustic pulse generator

Acoustic pulse generator

Acoustic pulse generator

Acoustic source

Acoustic stimulation method with axial driver actuating...

Acoustic stimulation tool with axial driver actuating moment...

Acoustic transmitter

Actuator for an air gun having a reciprocating shuttle valve

Air cushion shear wave vibrator

Air gun fire time sensor

Air gun firing sensor apparatus and system

Air gun monitoring and synchronizing method and apparatus

Air gun utilizing magnetized shuttle