Special opening and closing tool for unlimited-level full-bore staged fracturing sliding sleeve

Abstract

The invention relates to a special opening and closing tool for an unlimited full-bore staged fracturing sliding sleeve, which is provided with a salvage device, a sealing isolation device and a sliding sleeve positioning opening and closing device, a password block is arranged in the sliding sleeve positioning opening and closing device, and the salvage device comprises a salvage mechanism and a salvage mechanism. The sealing and isolating device in the switch tool has the function of a packer, and can seal and isolate stratum sand through a rubber sleeve between the switch tool and the inner wall of a staged fracturing sliding sleeve connected in a well completion pipe string, so that the sealing and isolating device can be used for sealing and isolating the stratum sand, and the sealing and isolating device can be used for sealing the inner wall of the staged fracturing sliding sleeve in the well completion pipe string. And the risk that movable parts of the device are stuck by sand is greatly reduced, later salvage construction is facilitated, and conditions are created for safe pulling-out of the device. And the production cost is obviously reduced. The mode that the fracturing sliding sleeve is opened by moving up and down in a well completion pipe string is adopted, the working principle is simple, and convenience, practicability, safety and reliability are achieved.

Description

technical field [0001] The invention relates to a switch tool for a layered fracturing sliding sleeve of an oil and gas well in the petroleum industry, in particular to a special switching tool for an unlimited-level full-diameter segmental fracturing sliding sleeve. Background technique [0002] With the development of low-permeability reservoirs, there are more and more downhole fracturing tools, especially the layered fracturing technology, which is widely used because it can greatly improve the oil production efficiency. The special switch tool is a key tool to reflect the advantages and disadvantages of layered fracturing technology. [0003] The existing switch tools for sliding sleeves can realize the opening of multi-layer sliding sleeves downhole, but the structure of the switching tools is relatively complicated, and some sliding sleeve switching tools are too precise. The resulting difficulty in operation affects the normal use of the tool. [0004] For example,...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of the above-mentioned existing sliding sleeve key switch tools, a special switch tool for unlimited full-bore and segmented fracturing sliding sleeves is provided to solve the problem of complex structure of the existing sliding sleeve switch tools, which are easy to be sanded and broken. Troubleshoot difficult problems, shorten construction time, and reduce production costs

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