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A mining drill pipe male joint and drill pipe with fracture self-locking function

A male joint, self-locking technology, applied in drill pipe, drill pipe, earthwork drilling and other directions, can solve problems such as drill pipe breakage, and achieve the effect of ensuring safety, increasing operation process and simple structure

Active Publication Date: 2021-12-31
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and deficiencies in the prior art, the present invention provides a mining drill pipe male joint and drill pipe with fracture self-locking function, so as to solve the problem of drill drop caused by drill pipe fracture and meet the needs of safe and efficient hole formation in coal mines

Method used

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  • A mining drill pipe male joint and drill pipe with fracture self-locking function
  • A mining drill pipe male joint and drill pipe with fracture self-locking function
  • A mining drill pipe male joint and drill pipe with fracture self-locking function

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a mining drill pipe male joint with fracture self-locking function, such as figure 1 , figure 2 and Figure 4 As shown, the male joint 1 is provided with a central through hole and a self-locking connecting rod 2 is provided in the central through hole.

[0041] The two ends of the male joint 1 are the male joint welding end face 15 and the male joint end face 11 respectively, and the male joint external thread 12 is provided near the male joint end face 11; The joint end face 11 is a first stepped hole 101 , a second stepped hole 102 and a third stepped hole 103 with diameters gradually reduced, and the inner wall of the third stepped hole 103 is provided with a male joint internal thread 16 .

[0042] The self-locking connecting rod 2 includes a tubular connecting rod body 22, the outer wall of one end of the connecting rod body 22 is an annular boss 21, and the outer wall of the other end is an external thread 23 of the self-locking connec...

Embodiment 2

[0050] This embodiment provides a mining drill pipe male joint with fracture self-locking function, such as image 3 and Figure 4 As shown, the male joint 1 is provided with a central through hole and a self-locking connecting rod 2 is provided in the central through hole. The difference between this embodiment and Embodiment 1 is that the central through hole of the male joint is from the end surface 11 of the male joint to the welding end surface 15 of the male joint. hole 103, and the inner wall of the third stepped hole 103 is provided with a male joint internal thread 16; other settings, functions and implementation effects are the same as those in Embodiment 1.

Embodiment 3

[0052] This embodiment provides a mining drill pipe with fracture self-locking function, such as Figures 5 to 10 As shown, it includes a rod body 4 and a male joint 1 and a female joint 3 arranged at both ends of the rod body;

[0053] The female joint 3 is provided with a central through hole, and the two ends of the female joint 3 are respectively a female joint welding end face 33 and a female joint shoulder 31, and a female joint internal thread 37 is provided near the female joint shoulder 31; the female joint internal thread 37 can be connected with The external thread 12 of the male joint is screwed together to realize the threaded connection between the drill pipes; the rod body 4 is provided with a central through hole, and the central through holes of the rod body 4, the male joint 1, the female joint 3 and the self-locking connecting rod 2 are all coaxial.

[0054] Between the female joint welding end face 33 and the female joint shoulder 31 is a cylindrical outer ...

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Abstract

The invention discloses a mine drill pipe male joint and a drill pipe with a fracture self-locking function. By arranging a self-locking connecting rod in the male joint, the outer thread of the male joint is broken and the shallow outer thread part of the male joint is connected to the broken part. The axial connection between the thread parts of the deep male joint body at the fracture is used to make use of the connecting body formed by the deep external thread of the male joint still meshing with the internal thread of the female joint at the fracture, so that all the drill pipes at the deep fracture are lifted out to effectively solve the problem The problem of drill drop after the existing drill pipe breaks is solved, the safety of drilling construction is ensured, and the safe and efficient mining of coal mines is promoted.

Description

technical field [0001] The invention belongs to the technical field of underground drilling tools for coal mines, and in particular relates to a mining drill pipe male joint and a drill pipe with a fracture self-locking function. Background technique [0002] As an important traditional energy industry in my country, the coal industry is an important part of my country's national economy. Safe and efficient mining of coal is of great significance to ensuring energy security, promoting economic development and maintaining social stability. In the process of coal mining, there are threats of disasters such as gas, water inrush, and rock burst. Drilling is the main technical means for coal mines to control gas, prevent water damage, and reduce ground stress. Drill pipe is an indispensable drilling tool for drilling construction. , is also one of the important assets of the coal mine. However, the drill pipe will continue to wear and fatigue during the construction process. Whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/042
CPCE21B17/042
Inventor 董昌乐王传留田宏杰吴智峰鄢忠方杨虎伟李渊常宏
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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