Marine seismic acoustic source

Details Marine seismic acoustic source Marine seismic acoustic source

1984-05-29

1986-07-29

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

181120, G01V 104, H04R 102

Patent

active

046034099

ABSTRACT:
An acoustic source for seismic exploration in a water environment consists of an elongated cylindrical housing, closed at both ends and containing laterally disposed exhaust ports. A reciprocable piston and piston follower are slidably mounted within the housing for reciprocal movement. Pressurized hydraulic fluid is admitted to one end of the housing, forcing the piston follower to contact the piston and move towards the opposite end of the housing. A pneumatic latching device retains the piston proximate opposite cylinder end and pressurizes the system. The hydraulic fluid is drained, allowing the piston follower to return to its original position. During the return trip of the piston follower, water is ingested through the exhaust ports to the chamber between the piston and the piston follower. A triggering mechanism then releases the piston that is accelerated towards the piston follower, to impulsively expel the contained water. The ejected water creates a momentary cavity in the surrounding water. The cavity implodes, generating the acoustic signal.

REFERENCES:
patent: 4114723 (1978-09-01), Paitson et al.
patent: 4131178 (1978-12-01), Bouyoucos
patent: 4139835 (1979-02-01), Cholet et al.
patent: 4185714 (1980-01-01), Pascouet et al.
patent: 4196788 (1980-04-01), Sciard
patent: 4234052 (1980-11-01), Chelminski
patent: 4294328 (1981-10-01), Cholet et al.
patent: 4303141 (1981-12-01), Pascouet
Bill Jaworski, The Development and Evaluation of a New Marine Seismic Energy Source, The HP Water Gun, Thesis, Univ. Wisconsin-Milwaukee, Apr. 1975.

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