Hydraulic-type fracturing sliding sleeve opening and closing tool

Abstract

The invention discloses a hydraulic-type fracturing sliding sleeve opening and closing tool which is designed to be matched with a fracturing sliding sleeve for use to achieve the objective of multistage layered fracturing transformation of oil and gas fields. The hydraulic-type fracturing sliding sleeve opening and closing tool mainly comprises an upper protruding shoulder, a lower protruding shoulder, a core shaft of a central hole and a radial liquid incoming hole, an upper joint, a lower joint, an upper limiting sleeve, a lower limiting sleeve, an upper pressing sleeve, a lower pressing sleeve, a salvaging piece connected between the upper protruding shoulder and the lower protruding shoulder of the core shaft in a sleeved manner, springs arranged between the joints and the pressing sleeves, salvaging piece springs and the like, and the upper joint and the lower joint are connected on the core shaft. By the hydraulic-type fracturing sliding sleeve opening and closing tool, the fracturing sliding sleeve can be sequentially opened and closed, perforation is not needed, and integration of fracturing and production is realized. If a fracturing transformation mode of perforating by an electric cable, packing by a packer and beating the sliding sleeve by pitching during production is adopted, a steel ball and a ball seat can be drilled and grinded off, and controllable mining, single-layer testing for production and seeking of water plugging can be realized by utilizing the tool. The hydraulic-type fracturing sliding sleeve opening and closing tool is matched with the fracturing sliding sleeve for use and can meet technical requirements of multistage layered transformation, selective mining, single-layer wellhole testing and seeking of water plugging of the oil and gas fields.

Description

technical field

[0001] The invention relates to a hydraulic fracturing sliding sleeve switch tool, which belongs to the technical field of oil and gas field fracturing reconstruction. Background technique

[0002] At present, there are two main types of multi-stage fracturing reconstruction methods for cased wells in domestic oil and gas fields. One is cable perforation and mechanical packer interlayer isolation. By sequentially throwing balls, the fracturing sliding sleeve is opened to realize multi-stage fracturing reconstruction; It achieves multi-stage reconstruction through hydraulic perforation and hydraulic jet effect interlayer isolation. However, none of these integrated fracturing and production processes can meet the requirements of selective production and post-testing of oil and gas wells, and controllable production can only be achieved by setting up special testing tools.

[0003] In order to carry out selective mining and single-layer testing and production,...

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