Connecting structure of steel joint and aluminium alloy drill pipe body

A technology of aluminum alloy pipe and connection structure, which is applied in the direction of drill pipe, drill pipe, casing, etc., can solve the problems of poor sealing performance, low connection strength between aluminum alloy pipe body and steel joint, improve the bearing direction, and help Effective in sealing and matching process safety

Inactive Publication Date: 2013-01-30
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 present invention aims to provide a connection structure between the steel joint and the aluminum alloy drill pipe body to solve the problem of poor sealing performance between the existing aluminum alloy pipe body and the steel joint
In addition, the present invention also solves the problem of low connection strength between the aluminum alloy pipe body and the steel joint

Method used

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  • Connecting structure of steel joint and aluminium alloy drill pipe body
  • Connecting structure of steel joint and aluminium alloy drill pipe body
  • Connecting structure of steel joint and aluminium alloy drill pipe body

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Embodiment Construction

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0020] Such as figure 1 As shown, the connection structure between the steel joint and the aluminum alloy drill pipe body includes:

[0021] The outer thread 1 of the aluminum alloy pipe is arranged on the body of the aluminum alloy drill pipe; the sealing end face 5 of the aluminum alloy pipe is arranged on the body of the aluminum alloy drill pipe and connected to the outer thread 1 of the aluminum alloy pipe End (right end); aluminum alloy pipe end face shoulder 3, arranged on the aluminum alloy drill pipe body and connected to the end (right end) of the aluminum alloy pipe body sealing end face 5, the aluminum alloy pipe The body sealing end face 5 is connected between the external thread 1 of the aluminum alloy pipe and the...

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Abstract

The invention discloses a connecting structure of a steel joint and an aluminium alloy drill pipe body. The connecting structure of a steel joint and an aluminium alloy drill pipe body comprises an aluminum alloy pipe body external-thread, an aluminum alloy pipe body sealing end face, an aluminum alloy pipe body end-face shoulder, a steel joint internal-thread, a steel joint sealing end face and a steel joint end-face shoulder, wherein the aluminum alloy pipe body sealing end face is connected to the end part of the aluminum alloy pipe body external-thread; the aluminum alloy pipe body end-face shoulder is connected to the end part of the aluminum alloy pipe body sealing end face; the steel joint internal-thread is in threaded connection with the aluminum alloy pipe body external-thread; the steel joint sealing end face is connected to the end part of the steel joint internal-thread; the steel joint end-face shoulder is connected to the end part of the steel joint sealing end face, and the steel joint sealing end face is connected between the steel joint internal-thread and the steel joint end-face shoulder; and the aluminum alloy pipe body sealing end face and the steel joint sealing end face are mutually cooperated cone-shaped sealing surfaces, and the aluminum alloy pipe body end-face shoulder is in seal connection with the steel joint end-face shoulder.

Description

technical field [0001] The invention relates to an aluminum alloy drill pipe used in oil and gas exploration and development, in particular to an aluminum alloy drill pipe with a steel joint, and in particular to a connection structure between a steel joint and an aluminum alloy drill pipe body. Background technique [0002] Aluminum alloy drill pipe is divided into steel joint aluminum alloy drill pipe and all aluminum alloy drill pipe. In the processing technology of steel joint aluminum alloy drill pipe, steel joint and aluminum alloy drill pipe body are often connected by threaded connection. Since the aluminum alloy drill pipe not only has to bear the tensile force during use, but also the inner hole of the drill pipe is also a circulation channel for drilling fluid. It has sufficient sealing performance to ensure that the internal and external spaces of the drill pipe can withstand sufficient pressure differences. At the same time, the threaded connection between the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/042
Inventor 刘永刚李孝军冯春宋生印腾学清
Owner BC P INC CHINA NAT PETROLEUM CORP
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