METHOD OF PRODUCING FISSURE BY HYDRAULIC FRACTURE WITHIN PRESET INTERVAL OF FORMATION AND DEVICE FOR ITS EMBODIMENT Russian patent published in 1998 - IPC

FIELD: oil and gas industry for increasing production rate of newly put into operation wells and running producing and injection wells. SUBSTANCE: method consists in that run into well on tubing is hydraulic abrasive perforator with packer. Valve ball is installed. Tubing string is tested by pressure of hydraulic fracture. In so doing, bushing is located in the upper position to seal nozzles. Valve ball fulfils function of pressure testing one. Perforation channels are cut with removal of packer. Perforator is admitted to pre preset interval of producing formation. Bushing moves to the lower position. Nozzles are opened to discharge fluid with abrasive to open the formation. After cutting the channels, valve ball is removed. Packer is lifted above the formation and set again. As a result, bushing moves upward to seal nozzles. Then hydraulic fracturing of formation is performed. EFFECT: increased production rate of well due to produced fissures localized in formation sections and intensified working of separate intervals and interbeds. 4 cl, 2 dwg