Air release in seismic source air gun.

摘要

A seismic energy source air gun has a body (11) with an air chamber (23) formed therein that opens 360 degrees around the periphery of the body. A sleeve-type shuttle (13) covers the opening in a pre-fire condition. When the air gun is fired, the shuttle moves rapidly away from the opening providing a large area for compressed air held in the chamber to escape. This very quick release maximizes the acoustic output. The movement of the shuttle is ultimately controlled by a solenoid (16) which, when activated, causes the shuttle to move from the 360 degree opening and when deactivated permits the shuttle to move back into the pre-fire position over the 360 degree opening.