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Self-locking and unlocking device for sampling pipe joints of hollow stems for soft formations

A technology for hollow drill pipes and sampling pipes, which is applied in the direction of extracting undisturbed core devices, drill pipes, drill pipes, etc., which can solve the problems of loose and dropped drill pipes, and achieve the effect of convenient replacement and prevention of loosening

Inactive Publication Date: 2012-01-18
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the drill pipe rotates in the opposite direction, the interface thread will be loosened, and the drill pipe may loosen and fall due to this

Method used

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  • Self-locking and unlocking device for sampling pipe joints of hollow stems for soft formations
  • Self-locking and unlocking device for sampling pipe joints of hollow stems for soft formations
  • Self-locking and unlocking device for sampling pipe joints of hollow stems for soft formations

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Such as figure 1 , 2 As shown in and 3, the self-locking and unlocking device of the hollow drill pipe sampling pipe interface in soft rock formations includes a metal hollow drill pipe female joint 1, a slider spring 2, a locking slider 3, a latch 4, a latch spring 5 and a metal hollow drill pipe male Connector 6.

[0016] The bottom of the metal hollow drill pipe female joint is symmetrically opened with a slider groove, and a translational locking slider is installed in the slider groove. One end of the locking slider extends out of the metal hollow drill pipe female joint (to facilitate the operation of the manipulator), and the other end It is connected with one end of the slider spring in the slider groove, and the other end of the slider spring is fixed with the inner wall of the slider groove.

[0017] The end face of the metal hollow drill pipe male ...

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Abstract

The invention relates to a self-locking and unlocking device for the sampling pipe joints of hollow stems for soft formations. The bottom of the metal hollow stem female joint is symmetrically provided with slider sockets, movable locking sliders are mounted in the slider sockets, one end of each locking slider is extended out of the metal hollow stem female joint, the other end of each locking slider is connected with one end of a slider spring in the slider socket, and the other end of each slider spring is fixed on the inner wall of the slider socket. The end surface of the metal hollow stem male joint is symmetrically provided with bolt sockets, bolts are limited in the bolt sockets, one end of each bolt is fixed on a bolt spring, and the other end of each bolt is extended out of the end surface of the metal hollow stem male joint. The self-locking and unlocking device can prevent a drilling rig from being unthreaded during reverse rotation, and meanwhile, the drill stem can be conveniently replaced.

Description

technical field [0001] The invention belongs to the technical field of underwater drilling, and relates to a self-locking and unlocking device for a sampling pipe interface of a hollow drill pipe in a soft rock formation. Background technique [0002] Core drilling tools used for soft rock formations such as soil, sediment, and silt, such as large-scale engineering drills, usually use hollow drill pipes (and casings) to take cores, and the outer wall of the drill pipe is threaded to provide downward driving force. When the drilling tool goes down, the connection part of the drill pipe will form self-tightening due to the design of the thread rotation. When lifting the drill, the frictional force and viscous force of the sediment and silt make the lifting resistance of the drill very large. It is necessary to reversely select the drill pipe while lifting the drill to provide upward force for the drill pipe by means of the thread. When the drill pipe rotates in reverse, the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/043E21B25/18
Inventor 秦华伟周红伟叶瑛陈鹰杨微杨厉昆邱文
Owner HANGZHOU DIANZI UNIV
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