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A radial and axial double-locking marine drill pipe threaded joint

A technology of threaded joints and external threaded joints, which is applied in the direction of drill pipes, drill pipes, drilling equipment, etc., can solve the problems of high replacement cost, harsh connection requirements, and affecting the operation efficiency of oil drill pipes, and achieve the effect of stable connection

Active Publication Date: 2017-02-22
JIANGSU HEXIN PETROLEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the oil drill pipe is drilling, it mainly bears compound loads such as torsion, tension and compression, bending, vibration, etc., so the requirements for the connection between the oil drill pipes are harsh. The threaded joints of the rods often have unstable connections and dislocations. The cost of replacement is high, and the replacement steps are cumbersome, which seriously affects the operating efficiency of oil drill pipes.

Method used

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  • A radial and axial double-locking marine drill pipe threaded joint
  • A radial and axial double-locking marine drill pipe threaded joint
  • A radial and axial double-locking marine drill pipe threaded joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 and 2 As shown, a radial and axial double-locking marine drill pipe threaded joint includes an external threaded joint 1 and an internal threaded joint 2 . The externally threaded joint 1 and the internally threaded joint 2 are in a cylindrical structure, and a pipeline for offshore oil transportation is arranged on the inner side thereof. An outer shoulder surface 11 is provided on the outer side of the externally threaded joint 1 . The external thread joint 1 and the internal thread joint 2 are threadedly connected. It also includes a locking sleeve 5, the locking sleeve 5 has a columnar structure with two ends open, and the inner side of the locking sleeve 5 is provided with locking threads 51. The outer surface of the externally threaded joint 1 is provided with a first connecting thread 7 , and the external surface of the internally threaded joint 2 is provided with a second connecting thread 6 . The first connecting thread 7 and the second connec...

Embodiment 2

[0031] like image 3 As shown, this embodiment refers to Embodiment 1, and the difference lies in that the end surface 214 of the internally threaded joint includes a contact slope 211 and a connection slope 212 . The connection slope 212 is disposed inside the contact slope 211 . The inclination directions of the contact slope 211 and the outer shoulder surface 11 are consistent. The inclination directions of the connection slope 212 and the contact slope 211 are opposite. An annular gap 3 is formed between the connecting slope 212 , the outer shoulder surface 11 and the outer wall 8 of the externally threaded joint 1 . The annular gap 3 formed between the connecting slope 212, the outer shoulder surface 11 and the outer wall 8 of the external threaded joint 1 reduces the weight of the internal threaded joint 2, making it easier for the external threaded joint 1 to generate radial force on the internal threaded joint 2 The effect further enhances the radial locking force o...

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PUM

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Abstract

A threaded connector of a radial and axial double-locking ocean drill rod comprises an external threaded connector body and an internal threaded connector body, an outer circular bead face is arranged at the outer side of the external threaded connector body, and the external threaded connector body and the internal threaded connector body are in threaded connection. The threaded connector further comprises a locking sleeve, a locking thread is arranged at the inner side of the locking sleeve, a first connecting thread is arranged on the outer side face of the external threaded connector body, a second connecting thread is arranged on the outer side face of the internal threaded connector body, the first connecting thread and the second connecting thread are connected end to end to form a locking matching thread, and the locking thread and the locking matching thread are in threaded connection. The external threaded connector body and the internal threaded connector body are connected more firmly.

Description

technical field [0001] The invention relates to offshore oil exploitation equipment, in particular to the structure of the drill pipe threaded joint. Background technique [0002] At present, offshore oil exploration generally uses oil drill pipes, which are connected end-to-end through threaded joints. Threaded joints generally include external threaded joints and internal threaded joints, and external threaded joints and internal threaded joints are connected end-to-end through threads. . However, when the oil drill pipe is drilling, it mainly bears compound loads such as torsion, tension and compression, bending, vibration, etc., so the requirements for the connection between the oil drill pipes are harsh. The threaded joints of the rods often have unstable connections and dislocations, and the cost of replacement is high, and the replacement steps are cumbersome, which seriously affects the operating efficiency of oil drill pipes. SUMMARY OF THE INVENTION [0003] Ai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/043
Inventor 王荣锴黄敏赵钧羡刘志强胡郁乐段隆臣胡新丽李波
Owner JIANGSU HEXIN PETROLEUM MACHINERY