Sliding sleeve control tool and hydraulically controlled sliding sleeve with overriding operation

Abstract

The invention discloses a sliding bush control tool and a hydraulic-control sliding bush capable of achieving surpassing operation. An upper protrusion (243), a clamping groove (242) and a lower protrusion (244) are arranged on the outer wall of a clamping bush (24) of the sliding bush control tool, and an upper groove (91), a boss (93) and a lower groove (92) which are matched with the upper protrusion (243), the clamping groove (242) and the lower protrusion (244) are arranged in a sliding bush body. Only when the sliding bush control tool reaches a corresponding position of the sliding bush body, the clamping bush (24) can extend out of the sliding bush control tool to be in the stretched state, so that the clamping bush (24) can automatically identify the boss (93) on the sliding bush body (9) and clamp the sliding bush body (9). At the moment, the sliding bush body is opened and closed by lifting or putting down a tubing or coiled tubing. Therefore, the defect of proneness to misoperation of a traditional sliding bush tool can be avoided, operating efficiency is improved, and operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a sliding sleeve control tool used in the oil well fracturing operation to realize the position identification of the downhole sliding sleeve and to switch the sliding sleeve, and also a tool used in the oil well fracturing operation that can realize surpassing Operated hydraulic control sleeve. Background technique [0002] In oilfield production, the electronically controlled fracturing sleeve has the advantages of large diameter, simple operation process, high success rate and safety, and easy multi-stage unimpeded fracturing. It is a new type of fracturing sleeve that has emerged in recent years. For example, Chinese patent CN102518420A, published on June 27, 2012, discloses "An Unlimited Layer Electronically Controlled Fracturing Sliding Sleeve". Electronically controlled sliding sleeves often work under pressure conditions of 70MPa or even higher, and the do...

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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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