Recoil reducing system for gas guns
Removable piston bore liner for hydraulically actuated seismic v
Repetitive detonation seismic surveying method and apparatus
Rotary air modulator
Rotary seismic shear-wave source
Rotatable horizontal vibrator
Rotating eccentric weight apparatus and method for generating co
Rotating eccentric weight seismic sources and a seismic explorat
Sea water hydraulic fluid system for an underground vibrator
Seismic apparatus
Seismic energy source
Seismic energy source
Seismic exploration method using a rotating eccentric weight sei
Seismic exploration system
Seismic exploration system for ice covered areas
Seismic exploration using compressional and shear waves simultan
Seismic exploration with a swinging-weight vibrator
Seismic explosive charge loader and anchor
Seismic land source
Seismic marine gun assembly