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Structure for connecting inner pipe of drill rod and pup joint of drill rod

A technology of connecting structure and short joints, applied in the direction of drill pipe, drill pipe, casing, etc., can solve the problems of safety accident, easy tripping, vibration, etc., and achieve the effect of avoiding relative rotation, improving work stability and work efficiency

Inactive Publication Date: 2014-01-15
WUXI GEOTEC GEOLOGICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing inner pipe and the pup joint are directly sleeved and connected by buckle. Although this connection method is easy to operate and fast, due to the high-speed rotation of the drill pipe, vibration and relative rotation between the pup joint and the inner pipe are prone to occur. Cause the two to be easily tripped, causing a safety accident

Method used

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  • Structure for connecting inner pipe of drill rod and pup joint of drill rod
  • Structure for connecting inner pipe of drill rod and pup joint of drill rod

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Embodiment Construction

[0010] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0011] See figure 1 and figure 2 , the present invention includes an inner pipe 1 with an internal thread 11 at one end and a short joint 2 with an external thread 21 at one end, the inner pipe 1 and the short joint 2 are spirally connected through the internal thread 11 and the external thread 21; the short joint 2 The root of the external thread 21 has a positioning flange 22. When the short joint 2 and the inner pipe 1 are spirally connected, the positioning flange 22 is close to the end 11 of the inner pipe 1 to prevent excessive screwing between the short joint 2 and the inner pipe 1. It is not convenient to separate the two. In the present invention, the other end of the short joint 2 is a connecting portion 23 with an internal thread, and the connecting portion 23 is used for screwing connection with another inner pipe.

[0012]...

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PUM

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Abstract

The invention relates to a structure for connecting an inner pipe of a drill rod and a pup joint of the drill rod. The structure comprises the inner pipe and the pup joint and is characterized in that one end of the inner pipe is provided with inner threads, one end of the pup joint is provided with outer threads and the inner pipe and the pup joint are connected in a screwed mode through matching of the inner threads and the outer threads. The outer thread root portion of the pup joint is provided with a positioning flange. The inner pipe is fixed with the pup joint in a threaded connection mode. Relative rotation between the inner pipe and the pup joint when the drill rod rotates in a high speed is avoided, so that working stability and working efficiency of the drill rod are improved.

Description

technical field [0001] The invention relates to the field of geological exploration equipment, in particular to a connection structure of a drill pipe on a drilling rig. Background technique [0002] The drilling rig is an indispensable equipment in geological exploration. The drill pipe on the drilling rig is a cylindrical long strip structure. In order to facilitate the adjustment of the length of the drill pipe, the drill pipe is generally composed of a combination of multiple short rods. The connection between the short rods This is achieved through inner tubes and pup joints. The existing inner pipe and the pup joint are directly sleeved and connected by buckle. Although this connection method is easy to operate and fast, due to the high-speed rotation of the drill pipe, vibration and relative rotation between the pup joint and the inner pipe are prone to occur. Cause the two to be easily tripped, causing a safety accident. Contents of the invention [0003] The...

Claims

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Application Information

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IPC IPC(8): E21B17/043
Inventor 苏刚姚风雷鲍新毅
Owner WUXI GEOTEC GEOLOGICAL EQUIP
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