Half-period self-correcting anti-bending drilling tool

Abstract

The invention relates to a half-cycle self-correction anti-bending drilling tool. The half-cycle self-correction anti-bending drilling tool comprises a drill bit and an outer pipe, and is characterized in that the outer pipe is composed of an upper core barrel and a lower core barrel, the upper end of the upper core barrel is connected with an upper eccentric piece, matrix-shaped alloy upper eccentric bodies are evenly embedded in and welded to a half of the circumferential face of the upper eccentric piece, a lower eccentric piece is connected between the upper core barrel and the lower core barrel, matrix-shaped alloy reverse eccentric bodies are evenly embedded in and welded to a half of the circumferential face of the lower eccentric piece, the angle difference between the half of the circumferential face with the upper eccentric bodies and the half of the circumferential face with the lower eccentric bodies is 180 degrees, the drill bit is an eccentric drill bit and is connected to the lower end of the lower core barrel, the highest eccentric point of the eccentric drill bit and the highest eccentric point of the upper eccentric piece are located on the same bus I of the drilling tool, the highest eccentric point of the lower eccentric piece is located on the bus II of the drilling tool, and the angle difference between the bus I and the bus II is 180 degrees. The half-cycle self-correction anti-bending drilling tool is simple in structure, ingenious in principle, easy to machine, outstanding in anti-bending effect, high in practicability and high in drilling efficiency, and the problem that a drilled hole is prone to being bent when underground hole drilling construction is conducted is thoroughly solved.

Description

technical field [0001] The invention relates to a drilling tool for underground drilling, in particular to a half-period self-correcting anti-bending drilling tool. Background technique [0002] When conducting underground drilling construction, due to the influence of various reasons such as the stratum structure, the drilling hole will usually be bent. After the drilling hole is bent, the drilling resistance of the drilling tool will be increased, resulting in the breakage of the drill pipe, making it impossible to continue the construction and scrapping the drill. hole, or the drilling quality is not up to standard, resulting in great economic losses. The construction of underground drilling has a long history. Many experts and technicians in the industry are constantly researching and discussing the anti-bending problem of drilling. Install guides, etc., which have a certain control effect on controlling the bending of the drilling inclination angle, but the effect of c...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a half-period self-correcting anti-bending drilling tool with simple structure, easy processing and outstanding anti-bending effect, which fundamentally solves the problem that the borehole is easy to bend during underground drilling construction. Compared with the method of drilling bending, its principle is ingenious, strong in practicability, good in anti-bending effect, high in drilling efficiency, and does not affect the traditional construction technology and drilling tool processing technology

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