Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent
1978-07-31
1980-10-28
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Seismic wave generation
181118, 367144, G01V 114, G01V 138
Patent
active
042302013
ABSTRACT:
Disclosed is a seismic source device, known in the industry as an air gun, having shuttle control for allowing a predetermined discharge of compressed air into water for purposes of seismic exploration. The shuttle is controlled by secondary shuttle means for closing the exhaust ports before all of the compressed air in the firing chamber of the air gun is exhausted. This point of closing the exhaust ports before virtually all of the compressed air is discharged differs from prior art air guns. By preventing further discharge of air, secondary pulses are greatly reduced, thereby enhancing the operation of the entire system. Further, by preventing all the air in the firing chamber from being discharged, the system becomes more efficient and more cost effective.
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patent: 3249177 (1966-05-01), Chelminski
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patent: 3369627 (1968-02-01), Schempf
patent: 3653460 (1972-04-01), Chelminski
patent: 3750097 (1973-07-01), Herolih et al.
patent: 4047591 (1977-09-01), Word et al.
patent: 4141431 (1979-02-01), Baird
Kramer et al, "Seismic Energy Sources 1968 Handbook," 10/68, pp. 19-36, Bendix Corp., 38th Annual Meeting of the SEG, Denver Colorado.
Devine Thomas G.
Heitinup Leo
Moskowitz Nelson
Sharp Melvin S.
Texas Instruments Incorporated
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