An open sliding sleeve anti-jack device and its control method

Abstract

The invention discloses a sliding sleeve opening bop. The sliding sleeve opening bop comprises a body, a first supporting key, a second supporting key and empty slots, the body is of a cylindrical structure; the first supporting key and the second supporting key are arranged on the opposite sides of the body and can rotate around the body in the radial direction, and the first supporting key and the second supporting key are axially perpendicular to the body when been fully opened; the empty slots are located on the two sides of the body provided with the first supporting key and the second supporting key, the shapes of the empty slots are corresponding to the swept shape of the body in the radial rotating process of the first supporting key and the second supporting key around the body and are used for fully accommodating the first supporting key and the second supporting key, so that axial included angles between the supporting keys and the bop can be controlled more precisely, and resistance generated by the bop in a pipeline is controlled to prevent up-jacking. The invention further provides a controlling method for the sliding sleeve opening bop, the lengths of the supportingkeys are adjusted according to the friction coefficient of the supporting keys, a sliding sleeve and the inner wall of the pipeline, then the axial included angle of the supporting keys and the bop and the rotating angle of the supporting keys are controlled, and the sliding sleeve opening process is completed rapidly and precisely.

Description

technical field [0001] The invention relates to the technical field of sliding sleeve opening for downhole steel wire operation, and more specifically, the invention relates to an anti-jack device for opening a sliding sleeve and a control method thereof. Background technique [0002] As the development of oil and gas reservoirs advances towards low-permeability and tight reservoirs, the traditional tools and technologies supporting them no longer meet the needs. The sliding sleeve is one of the key tools for communicating the annulus of the oil casing and realizing stratified fracturing during the fracturing process. In the process of oil and gas well completion and gas testing, the oil casing annulus is connected through the opening action of the sliding sleeve to realize circulation, fluid replacement, sand fracturing and other operations. In the process of opening the sliding sleeve, due to the strong pressure difference between the inside and outside of the sliding sle...

AI Technical Summary

Problems solved by technology

In the process of opening the sliding sleeve, due to the strong pressure difference between the inside and outside of the sliding sleeve, at the moment when the sliding sleeve is passively opened, a strong external pressure suddenly rushes into the oil pipe, pushing the sliding sleeve opening tool string to move up quickly, and the anti-topping tool now Connected to the top of the tool string, the support anti-top function lags behind, causing the wire tool string to be pushed to the top, resulting in accidents where the tool string is entangled by the steel wire or the tool falls into the well

Images