Full-bore multistage-key switch type fracturing slide sleeve

Abstract

The invention discloses a full-bore multistage-key switch type fracturing slide sleeve. By adoption of the full-bore multistage-key switch type fracturing slide sleeve, the problems that existing slide sleeves are complex in structure and low in working reliability are solved. The full-bore multistage-key switch type fracturing slide sleeve specifically comprises a slide sleeve actuator and a slide sleeve switch mechanism. The slide sleeve actuator comprises a slide sleeve main body, an inner drum, a pressure adjustment piston, a base and a pulling rod. The slide sleeve switch mechanism comprises a throwing block body, a switch body, a clamping block, an outer slide block, an inner slide block, a slide block spring, a switch spring and an upper cap. According to the full-bore multistage-key switch type fracturing slide sleeve, the circumferential rotating angle of the inner drum is small in the opening process of the slide sleeve, the total rotating angle of the inner drum in the circumferential direction is zero degree after the slide sleeve is opened and closed each time, error superposition in the rotating process is avoided, the working reliability is improved, the recognition effect is good, opening and closing of slide sleeves in different stratums can be controlled by different switch mechanisms, multiple times of opening and closing of sleeves in one single stratum can be achieved, and the comprehensive performance of the slide sleeve is good.

Description

technical field [0001] The invention relates to a fracturing switch sliding sleeve mechanism. Background technique [0002] In the process of oil extraction, the wellbore sleeve, as a component that communicates the reservoir and the wellbore, plays an irreplaceable role in improving oil extraction efficiency and optimizing resource allocation. [0003] The application number is 2016110255472. The "downhole full-bore infinite-stage sliding pin sliding sleeve switch" is designed and developed on the basis of the existing series of sliding sleeve switches. has been improved, but there are still some shortcomings in its working process: [0004] (1) The structure of the input wellbore switch device is too complicated, and the principle of seesaw is used for identification. If there is a boss structure in the wellbore, it is easy to trigger the counting of the seesaw and make the identification mechanism work invalid; [0005] (2) During the opening process of the sliding slee...

AI Technical Summary

Problems solved by technology

[0004] (1) The structure of the input wellbore switch device is too complicated, and the principle of seesaw is used for identification. If there is a boss structure in the wellbore, it is easy to trigger the counting of the seesaw and make the identification mechanism work invalid;

[0005] (2) During the opening process of the sliding sleeve, a large-angle circumferential rotation is required, and this circumferential rotation is an irreversible process, that is, each rotation continues to rotate in the same direction on the basis of the previous rotation, which is It is easy to accumulate the error generated by each rotation, and the sliding sleeve is prone to failure after multiple openings

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