Method and apparatus for generating a long sequence of seismic p

Details Method and apparatus for generating a long sequence of seismic p Method and apparatus for generating a long sequence of seismic p

1976-12-16

1978-02-14

Birmiel, Howard A.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181107, 227 9, G01V 112

Patent

active

040733637

ABSTRACT:
Within the stationary, upstanding cylindrical housing of a rapid fire seismic gas exploder an expansible detonation chamber is formed between a base resting on the earth and a piston adapted to move reciprocally. A plurality of separate external gas entry conduits communicate with the detonation chamber at spaced apart inlets in the wall of the housing. Each conduit is supplied from its own separate gas mixer which in turn is interconnected with sources of fuel gas and oxidizing gas through a pair of remotely operable flow control valves. As the pairs of control valves are actuated in timed sequence at a desired rate of fire, successive charges of combustible gas mixture are injected into the detonation chamber, utilizing one mixer and its associated gas entry conduit at a time. Correspondingly timed spark ignition is provided in or adjacent each mixer, resulting in a series of gas explosions in the chamber which coordinates with the reciprocal movement of the piston. By increasing the number of these separate mixer-conduit combinations, a rapid-fire shot sequence of any practical length can be achieved without preignition.

REFERENCES:
patent: 3055450 (1962-09-01), Richards
patent: 3338330 (1967-08-01), Chatenever
patent: 3545562 (1970-12-01), Gundlach
patent: 3620327 (1971-11-01), Savit
patent: 3860087 (1975-01-01), Silverman

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