A drill pipe joint

Abstract

The invention discloses a drill pipe joint, which comprises a male drill pipe, a female drill pipe, a snap ring and a nut. The lower end surface of the male drill pipe is provided with an inner stop, and the opening of the inner stop is provided with a chamfer. The male drill The outer circumferential wall of the rod is provided with a groove, the upper end surface of the female drill pipe is provided with an outer stop matching the inner stop of the male drill pipe, and the outer circumferential wall of the female drill pipe is provided with the same groove as the male drill pipe. The peripheral outer wall of the snap ring is provided with two external threads, and the peripheral inner wall of the snap ring is provided with up and down symmetrical sealing grooves and bumps. The male drill pipe and the female drill pipe are positioned and matched through the inner and outer seams, and the snap ring is inserted into the male drill through the bumps. The groove on the outer wall of the circumference of the rod and the female drill rod connects the male drill rod, the female drill rod and the snap ring into one body, and two nuts are installed at the two external threads on the outer wall of the circumference of the snap ring. The invention has the advantages of reliable sealing, ability to bear forward and reverse torque, and convenient assembly and disassembly.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a drill pipe joint. Background technique [0002] Most of the existing drill pipe joints are threaded connections. The threaded connection method is to process one joint into an internal thread and a seam on the end face, and the other joint that is connected with it is processed into an external thread and a seam on the end face, and the drill pipe is driven by the power of the drilling rig to tighten the thread to connect the two sections of the drill pipe. After tightening, the spigot on the end face is in a tight fit state. In the same way, the drill rod is driven by the power of the drilling rig to unscrew the thread and the two sections of the drill rod are disassembled. [0003] The threaded connection method has the following disadvantages: a) The drill pipe with the threaded connection method can only implement forward rotation drilling operations, and the drill pipe ...

AI Technical Summary

Problems solved by technology

[0003] The threaded connection method has the following disadvantages: a) The drill pipe with the threaded connection method can only implement forward rotation drilling operations, and the drill pipe must not be reversely rotated during construction operations, otherwise the drill pipe or drill bit will fall into the accident in the hole

c) Drill pipes with threaded connections are not provided with a sealing mechanism, and are completely sealed by the end faces of the upper and lower joints, and the sealing effect is difficult to guarantee

d. The screw thread of the threaded drill pipe joint is subjected to large torque and impact force, and is the most vulnerable part, which directly affects the service life of the threaded joint

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