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Sectional type oil drill pipe with seal structure

A sealing structure, oil drill pipe technology, applied in drill pipe, drill pipe, drilling equipment and other directions, can solve the problems of internal fluid leakage and poor sealing, so as to improve sealing performance, improve service life and prevent damage Effect

Active Publication Date: 2015-03-11
CHENGDU ZHIRONG ZHICHUANG INTPROP MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a leak-proof segmented oil drill pipe to overcome the problem of internal fluid leakage caused by the poor sealing of the existing segmented oil drill pipes

Method used

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  • Sectional type oil drill pipe with seal structure
  • Sectional type oil drill pipe with seal structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 , figure 2 As shown, the segmented oil drill pipe with a sealing structure includes a main rod body 2 and a joint body 6, and a through hole 1 passing through the main rod body 2 and the joint body 6 is arranged inside the main rod body 2 and the joint body 6, and the main rod body 2 The outer wall is symmetrically provided with two flat grooves 21, the outer wall of the joint body 6 is also provided with a wear-resistant sleeve 5, one end of the main rod body 2 is provided with an external thread joint 22, and the inner wall of the other end is provided with an internal thread, and the outer diameter of the external thread joint 22 Smaller than the main rod body 2, one end of the joint body 6 is provided with an internally threaded joint 61 that cooperates with the externally threaded joint 22, and the other end is provided with a conical joint 62. The elliptical groove 23 is provided with a groove at the joint between the inner threaded joint 61 and...

Embodiment 2

[0022] This embodiment is on the basis of embodiment 1, as figure 1 , figure 2 As shown, the transition between the main rod body 2 and the external threaded joint 22 is provided with a stepped surface, and the stepped surface is provided with an annular groove that cooperates with the sealing ring 3, and the surface that matches the stepped surface at the end of the internal threaded joint 61 is also provided with a The ring groove I where the sealing ring 3 fits.

[0023] When the main rod body 2 is connected to the joint body 6, the cooperation of the annular groove, the annular groove I and the sealing ring 3 can well block the external and internal through-hole 1 of the oil drill pipe, and realize the sealing of the through-hole 1, so that the through-hole The working environment in 1 is not affected by the external space environment of the drill pipe.

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Abstract

The invention relates to a sectional type oil drill pipe with a seal structure. The sectional type oil drill pipe comprises a main pipe body and a joint body, wherein the main pipe body and the joint body are respectively and internally provided with a through hole penetrating through the main pipe body and the joint body; one end of the main pipe body is provided with an external thread joint; the inner wall of the other end of the main pipe body is provided with internal threads; the external thread joint is smaller than the main pipe body in external diameter; one end of the joint body is provided with an internal thread joint matched with the external thread joint; the other end of the joint body is provided with a conical joint; a plurality of elliptical concave grooves matched with a seal ring are formed in the end part of the external thread joint; a concave groove is formed at a part, matched with the end part of the external thread joint, of the internal thread joint; the concave groove is matched with the seal ring. According to the sectional type oil drill pipe, as the end face of the external thread joint is provided with the elliptical concave grooves matched with the seal ring, and the elliptical concave grooves are matched with the concave groove in the internal thread joint, not only is the seal performance improved, but also the insertion of the seal ring is facilitated so that the seal ring is unlikely to fall.

Description

technical field [0001] The invention relates to the field of oil drill pipes, in particular to a segmented oil drill pipe with a sealing structure. Background technique [0002] Under normal geological conditions, the depth of oil drilling can reach several thousand meters, and the depth in special areas can reach tens of thousands of meters. The length of the drill pipe used for oil drilling is usually about 10 meters. As the drilling depth increases, the length of the drill pipe is sequentially connected with joints. If these connected drill pipes are damaged, the entire drill pipe can only be replaced. , not only wasting materials, increasing the cost, but also increasing the difficulty of maintenance, which is not conducive to use. A segmented oil drill pipe is set, but the sealing performance of the existing segmented oil drill pipe is not very good, and the segmented oil drill pipe During the use of the drill pipe, the liquid in the oil drill pipe will leak at the jo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/042
CPCE21B17/042
Inventor 贺昶明
Owner CHENGDU ZHIRONG ZHICHUANG INTPROP MANAGEMENT CO LTD
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