A hydraulic jet infinite stage fracturing device and fracturing method

Abstract

The invention discloses a hydraulic jetting infinite stage fracturing device and a fracturing method. The device comprises a cylindrical jetting gun body with the two ends capable of being connected with oil pipes. An infinite stage fracturing sliding sleeve capable of being fixed axially and conducing axial sliding along the inner wall of the jetting gun body is arranged in the jetting gun body in sealed and sleeved modes. A jetting nozzle which can enable an inner cavity of the infinite stage fracturing sliding sleeve and an external annulus of the jetting gun body to communicate is arranged on the side wall of the jetting gun body. The infinite stage fracturing sliding sleeve can axially slide to close one end of the jetting nozzle. A ball seat capable of being abutted and sealed by a sealing ball is arranged at one end of the infinite stage fracturing sliding sleeve. A hollow sliding sleeve switching device which can abut against the sealing ball to be away from the ball seat in a jacking mode is fixedly arranged in the jetting gun body. The end face, located at one end of the ball seat, of the infinite stage fracturing sliding sleeve can abut against the end face of one end of the sliding sleeve switching device. The fracturing device integrates perforating, fracturing and insulating together, and the purposes of simple structure, convenient operation and high fracturing operation efficiency are achieved.

Description

technical field [0001] The invention relates to the technical field of fracturing in oil and gas fields, in particular to a hydraulic jet infinite-stage fracturing device and a fracturing method for increasing production in the oil and gas exploitation process. Background technique [0002] With the rapid economic development, the development of conventional natural gas resources can no longer meet the needs of economic development. Unconventional natural gas resources have become the new darling of the world oil market due to their huge reserves, concentrated distribution, and increasingly advanced development technology. China has abundant unconventional natural gas reserves, among which the geological resources of shale gas are about 134×10 12 m 3 , the recoverable resources are about 25×10 12 m 3 , basically equivalent to conventional natural gas. Coalbed methane also has considerable exploration and development prospects, with geological resources reaching 36.8×10 ...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a hydraulic jet infinite stage fracturing device and fracturing method, which overcomes the problems of high technical difficulty and poor versatility in the prior art. The fracturing device integrates perforation, fracturing and isolation In one body, the purpose of simple structure, convenient operation and high fracturing operation efficiency is realized

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