METHOD FOR INCREASING TIGHTNESS AND STRENGTH OF BEDS Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: according to method, walls of well are subjected to treatment by high-speed streams of drilling mud which are crossing at angle of 90 deg. Mud streams are discharged from nozzles of drilling tool and generate hydroacoustic oscillations of low-frequency range with high amplitudes and also of high-frequency range with low amplitudes. Treatment of well walls by intercrossing high-speed streams which generate hydroacoustic oscillations of low-frequency range and high-frequency range is performed simultaneously. Intercrossing high-speed streams are located in planes which are perpendicular to longitudinal axis of drilling tool. Streams are spread along this axis. Intercrossing mud streams which generate oscillations of low-frequency range are located directly above drilling bit. Aforesaid procedure allows for cutting time needed for realization of hydroacoustic treatment of well walls and improves efficiency of sedimentation. EFFECT: higher efficiency. 1 dwg