Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent
1980-06-30
1982-10-12
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Seismic wave generation
367144, 367145, 181110, 181120, G01V 102
Patent
active
043534317
ABSTRACT:
Disclosed herein are improvements in a recoil reducing system of a gas gun which create pulses in a liquid medium by introducing therein gas under high pressure. The release of high pressure gas from the barrel of such a gas gun causes recoil of the barrel. To reduce recoil, a reaction plate is attached to the barrel by metal rods so that the high pressure gas will impinge upon the reaction plate before escaping into the medium, and the force exerted on the reaction plate by the impinging gas will at least partially balance the force of recoil. In a preferred embodiment of this invention, a layer of shock absorbent material is interposed between the reaction plate and the impinging gas to absorb some of the energy of the gas. Flexing of the metal rods is thereby reduced and the life of the rods is extended. Alternatively, the flexing of the rods is reduced by connecting each rod to the reaction plate through a chain link type of connection comprising two rings, each ring passing through the other ring.
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Exxon Production Research Company
Hsue James S.
Moskowitz Nelson
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