New mechanical hydraulic double-acting release

By designing the mechanical and hydraulic double-acting hand-loss of independent ball seats and upper joint stop rings, the problem of metal balls not being brought to the wellhead with the hand-loss, and the rapid leakage of high pressure in the pipe column is achieved, which simplifies salvage operations and reduces safety risks.

CN114233221BActive Publication Date: 2025-03-25BEIJING YILONG HENGYE PETROLEUM ENG TECH
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Patent Information

Application Number
CN202210040611.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-01-14
Publication Date
2025-03-25
Estimated Expiration
2042-01-14

AI Technical Summary

Technical Problem

After the existing mechanical and hydraulic double-acting hand loss is completed, the metal ball cannot be brought to the wellhead with the hand loss, resulting in difficulty in later salvage and the high pressure inside the pipe column cannot be leaked out quickly.

Method used

A new type of mechanical and hydraulic double-acting hand-loss was designed. The ball seat was an independent unit and inserted into the lower joint. After the hand-loss was completed, it was hung by the upper joint stop ring and was taken to the wellhead along with the upper joint and the pipe string. At the same time, the metal balls in the focal mount are also ejected together. The focal mount is designed with conical holes so that the metal balls can fall into it. After completion, the sealing of the focal mount fails. The high pressure in the tube column is released into the well along the upper joint pressure relief chamber and the barrier ring.

Benefits of technology

After the hand loss is completed, the metal ball is taken to the wellhead with the hand loss and no longer stays in the well, which simplifies the later salvage operation, and the high pressure in the pipe column can leak out quickly, avoiding the risk of high-pressure liquid retention.

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Abstract

The present invention discloses a novel mechanical hydraulic double-acting release arm, comprising an upper joint, a shear pin, a ball seat, a lower joint and a metal ball, and is characterized in that: the lower joint is inserted into the upper joint, and the upper joint and the lower joint are fixed together by the shear pin; the base of the ball seat is inserted into the lower joint, the lower end of the base of the ball seat is pressed against the step in the lower joint, and the upper end of the ball seat is inserted into the upper joint and is located in the sealing cavity of the upper joint; the ball seat has a tapered hole, and when the ball is released, the metal ball falls into the tapered hole. After the release arm of the present invention is released, its metal ball is brought to the wellhead by the pipe column along with the upper joint of the release arm, and after the release arm is released, the high pressure in the pipe column can also be quickly leaked into the well. The release arm has a simple structure, is quick to assemble, and is easy to maintain.
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