Particle motion sensor mounting for marine seismic sensor...
Penetrometer acoustic soil sensor
Piezoelectric seismic vibration device and method
Piezoelectric seismic vibration device and method
Piezoelectric seismic vibrator with hydraulic amplifier
Pivoted elevator mounting for mobile land seismic energy source
Pneumatic seismic signal generator with independent firing contr
Pneumatic wall-locking geophone system
Portable seismic energy source
Portable underwater signalling transducer
Power auger seismic source
Pressure-sensitive switch, its method of calibration and use...
Pressurized gas discharging apparatus for use as a down-bore sei
Process and a device for hydrodynamic sound pulse generation in
Process and device for seismic prospecting of a medium with indu
Process and devices for producing pressure - or shear-waves in a
Process for seismic exploration by means of a directive source
Production logging mechanism for across-the-borehole measurement
Projectile powered piston
Pulse generator powered vibrator