Drill rod joint

A technology for drill pipe joints and female joints, which is applied to drill pipes, drill pipes, drilling equipment, etc., can solve the problem that the torsional strength and sealing performance cannot meet the requirements of the geological environment, the stress of the drill pipe joints cannot be well dispersed, and the threads are easy to Fatigue fracture and other problems, to achieve the effect of improving the salvage ability, reducing the chance of deposition in the joint, and improving the hydraulic performance

Inactive Publication Date: 2013-01-30
TIANJIN DEHUA GASOLINEEUM EQUIP MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used conventional API standard drill pipe joint is a single shoulder, which is located at one end of the connecting thread of the joint. When the joint is fastened, the torque of the drill pipe is mainly borne by the shoulder surface, because the torsio

Method used

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[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Such as Figure 1 to 4 As shown, the drill pipe joint of the present invention includes a male joint 1 and a female joint 2. The male and female joints 1 and 2 are connected to each other through external and female joint threads 3 and 4; the male joint threads 3 are respectively provided on both sides There are a male connector main shoulder 5a and a male connector sub-shoulder 6a. Both sides of the female connector thread 4 are respectively provided with a female connector main shoulder 5b and a female connector sub-shoulder 6b. The main shoulder is for sealing and Anti-torsion effect, the auxiliary shoulder plays an anti-torsion effect; the taper of the male and female joint threads 3 and 4 is 1:6.

[0024] The root of the mai...

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Abstract

The invention discloses a drill rod joint which comprises a male joint and a female joint, wherein the male joint and the female joint are connected together through a male joint thread and a female joint thread in a mutual fit manner; a main male joint shoulder and a secondary male joint shoulder are respectively arranged at two sides of the male joint thread; a main female joint shoulder and a secondary female joint shoulder are respectively arranged at two sides of the female joint thread; when the male joint and the female joint are at the connected state, a main shoulder sealing cabin and a secondary shoulder sealing cabin are respectively arranged between the male and female joint threads and the main male and female joint shoulders and the secondary male and female joint shoulders; and the length ratio of the secondary and main shoulder sealing cabins is 1:1.9-2.2. With the adoption of the drill rod joint with the structure provided by the invention, the stress is distributed more uniformly; the load can be shared by the two ends of a thread buckle with stronger rigidity; and the anti-torque performance can be increased by more than 30% under the condition of identical wall thickness.

Description

technical field [0001] The invention relates to a petroleum engineering drilling tool, in particular to a drill pipe joint. Background technique [0002] Petroleum resources are strategic resources and the blood of industry. Governments of all countries attach great importance to the production of petroleum energy. With the improvement of oil exploration technology and drilling equipment, it is easy for professionals to find geological formations that store oil on the earth. However, the current land shallow 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. Accompanied by deep wells, ultra-deep wells and enhanced drilling put forward higher requirements on the performance of drill pipe joints. The commonly used conventional API standard drill pipe joint is a single shoulder, which is located at one end of the connecti...

Claims

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Application Information

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IPC IPC(8): E21B17/042
Inventor 张国辉刘发顺孙世杰矫健张博
Owner TIANJIN DEHUA GASOLINEEUM EQUIP MFG
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