Elastic elliptic bolt

Abstract

The invention relates to the elastic elliptic bolt for linking two pipes etc. in engineering construction. For example, the connection of the plug-in spiral drill pipe. In the existing techniques, the bolts of the plug-in spiral drill pipe are always U bolts which are easy to fall off without table connection. At the same time, the bolt holes on the corresponding father and mother joints of the U bolts are difficult to process. The invention is elastic elliptic bolt which is composed of the pin top (1), the pin rod (2) and the pin base (3). The cross section of (1) is round and that of (2) and (3) is ellipse. An elastic gap (4) is set at the radial position of (2) and (3). The father and mother joints of the two spiral drill pipes are connected by the opening and closing of (4). The elastic elliptic bolt has self-locking function, which is uneasy to fall off and its connection is convenient and reliable.

Description

technical field [0001] The invention relates to an elastic elliptical plug used for connecting two pipe strings in engineering construction, in particular to an elastic elliptical plug for connecting plug-in auger rods. technical background [0002] In the prior art, the connection mode of the plug-in helical drill pipe joint is a pin connection. In order to prevent this type of connection from being separated at the joint of the drill pipe joint during the feeding and pulling out of the drilling tool, the The axial direction adopts the "U" pin connection method, but it is found that the "U" pin has fallen off during field use, so the connection is not reliable. At the same time, during the production process, it was found that it was difficult to process the pin holes corresponding to the "U" pins on the male and female joints. Contents of the invention [0003] The object of the present invention is to provide an elastic ova...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the connection mode of the plug-in helical drill pipe joint is a pin connection. In order to prevent this type of connection from being separated at the joint of the drill pipe joint during the feeding and pulling out of the drilling tool, the The "U" pin connection method is adopted in the axial direction, but it is found that the "U" pin has fallen off during field use, so the connection is not reliable

At the same time, during the production process, it was found that it is difficult to process the pin holes corresponding to the "U" pins on the male and female connectors.

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