Drill-free ball seat

A ball seat and body technology, applied in the field of drill-free ball seat, can solve the problems of increasing completion cost, increasing completion risk, time-consuming and laborious, etc.

Pending Publication Date: 2017-08-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0016] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 For example, the positional relationship of front, rear, top, bottom, left, right, etc. is determined according to the layout direction of the drawings in the description.

[0018] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0019] as attached figure 1 , 2 , 3, the drill-free ball seat includes a ball seat body 1, a pawl sleeve, a shear pin 9 and a lower joint 10, and the outer side of the lower part of the ball seat body 1 and the upper inner side of the lower joint 10 are fixedly installed t...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): E21B33/12
CPCE21B33/1208
Inventor 李勇龙许晓晨张新文郭新超翟亚锋郭建军王文涛范庆
Owner BC P INC CHINA NAT PETROLEUM CORP
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