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Drill pipe joint

A technology of drill pipe joints and female joints, which is applied in the direction of drill pipes, drill pipes, drilling equipment, etc., can solve the problems that cannot meet the needs of complex working conditions, etc., to improve the salvageability, reduce the outer diameter of joints, and reduce stress concentration Effect

Inactive Publication Date: 2015-01-21
TIANJIN DEHUA GASOLINEEUM EQUIP MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it cannot meet the needs of complex working conditions

Method used

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Embodiment Construction

[0010] In order to make the object, technical solution and beneficial effects of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the protection scope of the present invention.

[0011] Such as figure 1 , figure 2 As shown, a drill pipe joint includes a male joint and a female joint. The male joint and the female joint are connected to each other through the outer and female joint threads; the two sides of the male joint thread are respectively provided with the main shoulder of the male joint and the secondary Shoulder, the two sides of the thread of the female joint are respectively provided with the main shoulder of the female joint and the auxiliary shoulder of the female joint. The threads of the male and female joi...

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Abstract

The invention discloses a drill pipe joint. The drill pipe joint comprises a male joint and a female joint, and the male joint is connected with the female joint through a male joint thread and a female joint thread in a matched mode. The two sides of the male joint thread are provided with a main male joint shoulder and an auxiliary male joint shoulder respectively, and the two sides of the female joint thread are provided with a main female joint shoulder and an auxiliary female joint shoulder respectively. The thread positions of the male joint and the female joint connected in the matched mode are conical in the axial direction, the conicity of each thread position is 1:12, the outer diameter phi of the large end of the male joint is 127+ / -5 mm, and the pitch diameter phi of the base surface of the male joint and the pitch diameter phi of the base surface of the female joint are 100+ / -1 mm. The conicity of the thread positions of the male joint and the female joint connected in the matched mode is improved, the thread positions have higher binding force, rigidity is enhanced, and torsion resistance can be improved by more than 60% under the circumstance that the wall thicknesses are the same; stress concentration of the connection position is lowered, and fatigue resistance is improved.

Description

technical field [0001] The invention belongs to petroleum engineering drilling tools, in particular to a drill pipe joint. Background technique [0002] At present, the shallow land oil resources on the earth have been basically exhausted. Coastal countries have turned to offshore oil drilling, and inland countries have sought deep oil resources by improving their drilling capabilities. With the improvement of oil exploration technology and drilling equipment, accompanied by deep wells, ultra-deep wells and enhanced drilling, higher requirements are put forward for the performance of drill pipe joints. [0003] Oil drill pipe is an important tool for oil and natural gas extraction, and it is the hub connecting the surface and the underground during the drilling process. The drill pipes are connected through joints, and the joints are processed with internal and external threads for connecting individual drill pipes. During the drilling process, the drill pipe joint is subj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/042
CPCE21B17/042
Inventor 刘发顺张国辉武磊
Owner TIANJIN DEHUA GASOLINEEUM EQUIP MFG
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