DEVICE OF HYDRO-ACOUSTIC GENERATOR Russian patent published in 2010 - IPC E21B28/00 E21B43/18 

FIELD: oil and gas production.

SUBSTANCE: device corresponds to case in form of cylinder transforming into bottom. The latter has a circular groove, an aperture for a clamp bolt, plugs, and threads for connecting plugs to the case. Also a movable pressure pipe is installed in centre of the plug; a diaphragm dividing the cavity of the case into upper and lower volume is attached to the end of the pipe. A bump stop in form of a conic disk is arranged under the pressure pipe; the stop is secured to the case with the clamp bolt. Volume between the diaphragm and the bump stop corresponds to a chamber of "build-up" pressure of working medium. A gap between the bump stop and the case corresponds to a circular nozzle opening into the circular chamber, volume of which is connected with the circular chamber by means of pipes, also the chamber is closed with the conic disk resting on a spacer bushing. The gap between the case and conic disk forms the circular nozzle opening into the circular chamber created with the conic disk, the case and the spacer bushing. The gap between the conic disk and the case also corresponds to the circular nozzle opening into the circular chamber formed with the plug, wherein there are made nozzles directing discharge of working medium into a borehole.

EFFECT: efficient propulsion of plugs into bottomhole cavity and high reliability of device operation.

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