Sleeve Control Tool

Abstract

The invention discloses a sliding sleeve control tool which comprises a base tube, a cutting sleeve, an upper compression ring and a lower compression ring. The base tube is provided with central holes communicated axially, an upper joint is arranged at the upper end of the base tube, a lower joint is arranged at the lower end of the base tube, a plurality of piston holes communicated with the central holes are formed in the base tube, and pistons are arranged in the piston holes. The cutting sleeve is provided with two semi-cutting sleeves, the two semi-cutting sleeves buckle oppositely and are sleeved on the outside of the base tube, a card slot is formed on the peripheral wall of the cutting sleeve, two ends of the card slot respectively form protrusion parts, and the pistons are opposite to the protrusion parts. The upper compression ring is sleeved on the base tube and is positioned at the upper end of the cutting sleeve, an upper spring is arranged between the upper compression ring and the upper joint, and the upper compression ring is pressed at the upper end of the cutting sleeve through pushing of the upper spring. The lower compression ring is sleeved on the base tube and is positioned at the lower end of the cutting sleeve, a lower spring is arranged between the lower compression ring and the lower joint, and the lower compression is pressed on the lower end of the cutting sleeve through the pushing of the lower compression ring. According to the sliding sleeve control tool, identification and positioning of the sliding sleeve can be proceeded accurately without errors.

Description

technical field [0001] The invention relates to a sliding sleeve switch, in particular to a hydraulically driven sliding sleeve control tool for realizing the position identification of the downhole sliding sleeve and switching the sliding sleeve. Background technique [0002] With the promotion and application of multi-stage fracturing technology, sliding sleeve tools are more and more widely used in oil fields. Accurately determining the position of the sliding sleeve and completing the normal opening and closing of the sliding sleeve will directly affect the smooth progress of multi-stage fracturing operations. [0003] At present, the sliding sleeve identification technology commonly used in oil fields is groove identification, that is, the grooves on the inner peripheral wall of the sliding sleeve are identified by the bumps set on the sliding sleeve control tool, so that the bumps are stuck in the grooves and Realize the connection between the sliding sleeve control to...

AI Technical Summary

Problems solved by technology

[0004] However, when operating in horizontal wells, highly deviated wells and other wellbores with complex structures, sand particles are often deposited in the grooves on the inner peripheral wall of the sliding sleeve, and the depth of the grooves becomes shallow, resulting in the inability of the sliding sleeve control tools to accurately identify The groove on the sliding sleeve cannot be positioned accurately, resulting in operation failure; in addition, because in the existing wellbore, each downhole tool usually needs to be connected through connecting parts such as couplings, there will be a gap between the coupling and the downhole tool. A concave structure is formed. When the sliding sleeve control tool is lowered into the tubing, the concave structure formed between the collar and the downhole tool will cause the bump on the sliding sleeve control tool to be misidentified, and the bump will be stuck in the concave structure. , resulting in misoperation of the sliding sleeve control tool, resulting in failure of the operation

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