Method and apparatus for sensing when a seismic gas exploder is

Details Method and apparatus for sensing when a seismic gas exploder is Method and apparatus for sensing when a seismic gas exploder is

1974-11-25

1976-01-27

Wilbur, Maynard R.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181114, 181401, G01V 106

Patent

active

039346722

ABSTRACT:
A seismic gas exploder is coupled to the movable piston of a hydraulic catching system so that the piston is constrained to move with the exploder as it rebounds upward from a shot and then falls back to earth. The weight of the gas exploder is applied through the piston to increase the pressure of the hydraulic fluid in the system when the exploder is moving in a downward direction. A two-position diaphragm actuated pressure switch monitors the fluid pressure, the position of the switch contacts being effective to control an exploder firing circuit or provide other indication of the exploder's position.

REFERENCES:
patent: 3277977 (1966-10-01), Silverman
patent: 3474880 (1969-10-01), Gundlach
patent: 3550719 (1970-12-01), Meister

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