METHOD AND FACILITY FOR HYDRAULIC FRACTURING OF BED Russian patent published in 2003 - IPC

FIELD: oil production, intensified oil output. SUBSTANCE: method includes insulation of productive interval, filling of tubing string with fluid and formation of water hammer by means of fluid injection and pressure relief in tubing string. In accordance with invention fluid is pumped from well by hydraulic pump till tubing string is full. Interval of hydraulic fracturing is insulated by packer placed in well below dynamic level but above productive interval. Gate is shut off and excessive pressure is created in tubing string with the use of hydraulic pump, pressure is discharged into zone under packer when specified value is achieved with the aid of valve. After it well is opened periodically and output of well is measured. Hydraulic fracturing is stopped after stabilization of output. Facility for realization of method has tubing string, packer, pressure relief valve. Facility has gate to close space of tubing string, hydraulic pump to evacuate fluid from well, to fill tubing string and to form excessive pressure in tubing string. Pressure relief valve is tuned to opening pressure creating conditions for hydraulic fracturing and is mounted on tubing string between packer and hydraulic pump communicating space of tubing string with zone under packer. EFFECT: increased amplitude and frequency of water hammers, reduced expenses for hydraulic fracturing of bed. 2 cl, 2 dwg