HYDRO-ACOUSTIC WELL DRILLING RIG Russian patent published in 2006 - IPC E21B7/00 E21B21/00 

FIELD: rock cutting tools, particularly to drill deep wells in geologically complicated conditions and to drill-in productive reservoir, as well as to disperse drilling mud and mortar directly inside the well during technological operation performing.

SUBSTANCE: hydroacoustic device has ejection unit to create depression at well bottom and hydroacoustic wave generation unit. Hydroacoustic wave generation unit is installed in drilling bit body and is made as vortex tube. Ejection unit is installed on device body and made as longitudinal groove with nozzle arranged in lower part thereof. The vortex chamber is spring-loaded to obtain modulated hydroacoustic waves. Ejection unit may be formed inside device body and made as jet means or as Venturi tube provided with nozzle, mixing chamber and diffuser. The hydroacoustic wave generation unit and ejection unit are modular and may be individually used in well drilling.

EFFECT: increased efficiency and possibility to retain natural reservoir output during primary opening thereof.

6 cl, 12 dwg