Internal sleeve air release control apparatus in seismic air gun

Details Internal sleeve air release control apparatus in seismic air gun Internal sleeve air release control apparatus in seismic air gun

1979-04-05

1981-01-27

Birmiel, Howard A.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181115, 367144, G01V 1137, G01V 1387

Patent

active

042469791

ABSTRACT:
Disclosed is a seismic source device, known in the industry as an air gun, having internal sleeve and shuttle control for allowing a predetermined discharge of compressed air into water for purposes of seismic exploration. The shuttle engages an internal sleeve having ports that momentarily align with exhaust ports and then moves past, sealing off the exhaust ports before all of the compressed air in the firing chamber of the air gun is exhausted. By preventing further discharge of air with little or no loss in acoustic output, 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.

REFERENCES:
patent: 3653460 (1972-04-01), Chelminski
patent: 4114723 (1978-09-01), Paitson et al.
patent: 4180139 (1979-12-01), Walker

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