초록 ▼

A marine acoustic seismic generator carried on the deck of a boat is coupled to a body of water in which the boat floats by a column of water in a pipe extending between the generator and the body of water. Post explosion oscillations are damped or terminated by venting the pipe of gas, either throu

A marine acoustic seismic generator carried on the deck of a boat is coupled to a body of water in which the boat floats by a column of water in a pipe extending between the generator and the body of water. Post explosion oscillations are damped or terminated by venting the pipe of gas, either through an orifice or a valve, at a selected time, to a selected pressure, to the atmosphere or below water.

대표청구항 ▼

Apparatus for seismic exploration from a boat over a body of water comprising a seismic generator including a pressure chamber having an outlet and a closure therefore movable between open and closed positions relative to said outlet and providing means to release suddenly a quantity of high pressur

Apparatus for seismic exploration from a boat over a body of water comprising a seismic generator including a pressure chamber having an outlet and a closure therefore movable between open and closed positions relative to said outlet and providing means to release suddenly a quantity of high pressure gas at the generator\s outlet when said closure opens, said generator being adapted for support (above water) from a boat with its outlet above water, a pipe of lOw expansibility connected at one end to the generator around the outlet from the pressure chamber thereof and the closure therefor and adapted to extend downwardly from the generator so mounted on the boat to a level below the surface of the water in which the boat floats, and filling means operative when the generator is supported from a boat with its outlet above water for filling the pipe with water to a level above the surface of the body of water in which the pipe is immersed and adjacent to said outlet, and fluid passage means at the other end of the pipe for communicating same with the surrounding open water when the generator is mounted on a boat with the pipe extending downwardly to below the surface of the water as foresaid, said one end of the pipe being in unrestrained communicating with said pressure chamber when said closure opens, thereby to admit high pressure gas to said one end of the pipe.