Seismic source system for use in water covered area

Details Seismic source system for use in water covered area Seismic source system for use in water covered area

1983-02-28

1986-12-30

Jordan, Charles T.

Acoustics

Geophysical or subsurface exploration

Well logging

181115, 181120, 367141, 367144, G01V 140, G01V 104, G01V 138, H04R 102

Patent

active

046322132

ABSTRACT:
Apparatus for forming a downwardly directed beam of acoustic wave energy in a body of water, comprising a source of acoustic wave energy such as a water gun, supported at a selected depth in the body of water. Means are provided above and around the source in the form of a series of concentric circular tubes of selected diameters and spacing so that the enveloping surface is a paraboloid. A large number of small perforations are spaced along these horizontal tubes through which compressed gas, which is supplied to the tubes, can escape and form spaced rising columns with small gas bubbles in the volume of water above the paraboloid. The highly reflecting contact surface between the water within the paraboloid and the gas-water mixture above the paraboloid causes downward reflection of seismic energy from the source in the form of plain waves of seismic energy.

REFERENCES:
patent: 2586706 (1952-02-01), Parr, Jr.
patent: 3563334 (1971-02-01), McCarter
patent: 3592286 (1971-07-01), Johnson
patent: 3658149 (1972-04-01), Neal et al.
patent: 3724374 (1973-04-01), Somerville et al.
patent: 4006794 (1977-02-01), Itria
patent: 4132974 (1979-01-01), Mollere
patent: 4189026 (1980-02-01), Elliot

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