Sealing part structure of high-tightness oil pipe

A sealing part, high sealing technology, applied in the direction of drill pipe, casing, drilling equipment, etc., can solve the problem of thread reducing air tightness, and achieve the effect of improving the ability to resist bending deformation

Active Publication Date: 2016-08-17
NANTONG YONGDA PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a sealing part structure of a high-tightness oil pipe, which solves the problems of the above-mentioned prior art, such as sticking and buckling caused by stress deformation of the thread, which reduces the airtightness and the like.

Method used

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  • Sealing part structure of high-tightness oil pipe
  • Sealing part structure of high-tightness oil pipe
  • Sealing part structure of high-tightness oil pipe

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Embodiment Construction

[0022] Such as figure 1 As shown, a sealing portion structure of a high-tightness oil pipe includes a pipe body 1 and a coupling 2, the outer circumference of the end of the pipe body 1 is provided with a pipe body thread 10 and a pipe body sealing portion 11, and the inner circumference of the coupling 2 is provided with There is a coupling thread 20 matching the pipe body thread 10 and a coupling sealing part 21 matching the pipe body sealing part 11, and the pipe body sealing part 11 is positioned at the front of the pipe body thread 10 screwing in direction (such as figure 1 The direction A shown is the screwing direction of the thread 10 of the pipe body. figure 1 A direction shown), the coupling sealing part 21 is located behind the screwing direction of the coupling part thread 20 (the screwing direction of the coupling part thread 20 is opposite to that of the pipe body part thread 10, that is, the opposite direction of A), and the pipe body 1 is also provided with a ...

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Abstract

A sealing part structure of a high-tightness oil pipe, including a pipe body and a coupling, the end of the pipe body is provided with a pipe body thread and a pipe body sealing part, and the coupling is provided with a coupling part thread and a matching The coupling sealing part of the pipe body sealing part, the pipe body sealing part is located in front of the pipe body in the direction of screwing in, the coupling sealing part is located in the rear of the coupling part in the direction of screwing in, and the axial section of the coupling sealing part is convex Smooth curve, the shaft section of the pipe body thread is a wavy line matching the convex smooth curve. The sealing portion structure of the high-tightness oil pipe provided by the present invention has a curved structure that cooperates with each other. After interference fit, multiple sealing rings can be formed, which reduces sticking and buckling and bending deformation of the sealing section of the pipe body, and improves the bending resistance of the connecting thread. ability to deform.

Description

technical field [0001] The invention relates to the field of high-tightness oil pipe manufacturing, in particular to a thread structure of a high-tightness oil pipe. Background technique [0002] The demand for clean energy such as oil, natural gas, shale gas, etc. is increasing, the depth of wells exploited is getting deeper and deeper, and the formation structure encountered is becoming more and more complex. For the exploitation tools (mainly including: tubing, casing and drill pipe, etc.) are becoming more and more demanding, which is mainly reflected in the requirements for material properties and the requirements for threaded connection performance of mining tools, and the technical difficulty is increasing, especially in locally refined structures. Traditional API threads can no longer meet the performance requirements of the oil field for threaded connections such as air tightness, connection strength, and corrosion resistance. [0003] The structure of the special ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00E21B17/02
Inventor 陈文凤
Owner NANTONG YONGDA PIPE IND
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