Patent ID: 9739900
Date: 2017-08-22
CPC Classifications: G01V

Claim:
1. A resonant source element for generating seismic waves in water, the resonant source element comprising: a housing having two openings covered by first and second pistons, wherein the first and second pistons and the housing define a cavity, the first and second pistons are configured to translate relative to the housing to generate the seismic waves; a first shaft attached to the first piston and a second shaft attached to the second piston; first and second seals connecting the first and seconds pistons to the housing for preventing sea water entering the cavity; and a pressure system configured to discharge inside the cavity to increase a pressure inside the cavity, and the pressure directly acts on the first and second pistons and makes the first and second pistons to oscillate back and forth relative to the housing, wherein the first and second pistons are configured to oscillate after the pressure system is fired, to generate the seismic waves having at least one resonant frequency, and wherein there is no active actuator mechanically connected to the first and second shafts to actuate the first and second pistons.