Drill-free ball seat

Abstract

The invention relates to the technical field of cementing tools, and provides a drill-free ball seat. The drill-free ball seat comprises a ball seat body, a pawl sleeve, a shear pin and a lower joint; the outer side of the lower portion of the ball seat body and the inner side of the upper portion of the lower joint are fixedly mounted together; the pawl sleeve comprises a claw flap section and an annular section sequentially distributed from top to bottom; the claw flap section is separated by a longitudinal groove distributed along the circumference to form at least two pawl flaps; the bottom end of each of the pawl flaps and the top surface of the annular section at the corresponding position are fixed together; the outer side of the upper end of each of the pawl flaps is fixedly provided with a limit protruding block. The drill-free ball seat is reasonable and compact in structure, and can achieve sealing through a sealing ball, and can also restore the normal diameter by pressing to ensure the normal and continuous operation of follow-up operations. The whole process does not require drilling and milling operations, can reduce the wear on sleeve tube inner walls, and is time-saving, effort-saving, convenient and quick; the construction efficiency can be effectively improved, the cost of well completing is reduced, and the security risks caused by the multi-process are reduced.

Description

technical field [0001] The invention relates to the technical field of well cementing tools, and is a drill-free ball seat. Background technique [0002] During liner cementing construction, when the liner string is sent to the designed position, a ball-suppressing seat-hanger is required. The pressure-suppressing ball seats currently used are all sealed by ball seat sleeves made of sealing balls and drillable materials. pressure. After the construction is completed, the position of the ball seat needs to be milled to form the full diameter of the casing to ensure subsequent construction. Its operation is not only time-consuming and labor-intensive, but also causes certain wear and tear on the inner wall of the casing, and also increases the cost of well completion and increases the risk of well completion. Contents of the invention [0003] The invention provides a drill-free ball seat, which overcomes the deficiencies of the above-mentioned prior art, and can effective...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a drill-free ball seat, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problem of the existing pressure-holding ball seat. It will cause certain wear and tear on the inner wall of the casing, and it will also increase the cost of well completion and increase the risk of well completion

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