High-efficiency hard rock drill bit

Abstract

The invention discloses a high-efficiency hard rock drill bit comprising a supporting plate, a supporting cylinder, a plurality of outer ring cutter bits and a plurality of inner ring cutter bits. Thesupporting plate is positioned in the supporting cylinder and fixed on the inner wall of the supporting cylinder; the plurality of outer ring cutter bits are fixed on the lower end cylinder edge of the supporting cylinder at intervals along the circumferential direction of the supporting cylinder; the plurality of inner ring cutter bits are fixed on the lower surface of the supporting plate; andthe plurality of outer ring cutter bits downwards exceed the plurality of inner ring cutter bits. According to the high-efficiency hard rock drill bit, as the outer ring cutter bits downwardly exceedthe inner ring cutter bits, a hole bottom rock stratum shape with a "concave" structure can be formed in the drilling process, and a groove is firstly cut at the outer edge of the drill bit, so that the whole structure of the inner rock surface and the outer rock surface of the drill bit is damaged, and the stroke free surface facilitates rock breaking of inner cutters, the rock breaking efficiency is improved, and the purposes of improving the drilling efficiency, reducing the construction cost and shortening the construction period are realized.

Description

technical field [0001] The invention relates to the field of drilling construction equipment, in particular to a high-efficiency hard rock drill bit. Background technique [0002] With the progress of science and technology in our country and the improvement of mechanization and intelligence, the construction technology of drilling method has been continuously developed, which can meet different construction fields and complex geological conditions. my country's drilling construction technology has been applied in many fields such as oil exploitation, coal mine construction, geological survey, pile foundation anchorage, etc., and has achieved remarkable economic and social benefits. [0003] At present, although the progress of drilling technology is obvious to all, there are still disadvantages of low drilling efficiency and long construction period in the drilling construction of hard rock formations. Contents of the invention [0004] The technical problem to be solved...

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Problems solved by technology

[0003] At present, although the progress of drilling technology is obvious to all, there are still disadvantages of low drilling efficiency and long construction period in the drilling construction of hard rock formations.

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