Self-sharpening type ring tooth impregnated diamond drill bit

A diamond-impregnated, self-sharpening technology, used in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of low life and low ROP of diamond bits, and achieve improved wear resistance, high ROP, high ROP, etc. The effect of high drill life

Active Publication Date: 2013-12-11
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a self-sharpening ring-tooth impregnated diamond drill bit with high ROP and high drill bit life, which solves the defects of low ROP and low service life of the existing diamond drill bit in hard rock drilling

Method used

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  • Self-sharpening type ring tooth impregnated diamond drill bit
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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following embodiments.

[0016] The overall structure of the self-sharpening ring tooth impregnated diamond bit provided by the present invention is as follows: figure 1 As shown, it at least includes a cylindrical drill body 1, and the top of the drill body 1 is inlaid with 2-16 arc-shaped cutting blocks 2 along the circumferential direction. According to the different diameters of the drill body 1, the provided cutting blocks The quantity of 2 is also different, and eight cutting blocks 2 are provided in the present embodiment. The height and arc length of the cutting block 2 are the same, the cross section of the cutting block 2 is fan-shaped, and the top surface of the cutting block 2 is the working lip surface.

[0017] There are 3-10 arc-shaped cutting teeth 3 on the working lip surface. In ...

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Abstract

The invention provides a self-sharpening type ring tooth impregnated diamond drill bit with higher mechanical drill speed and long service life. According to the self-sharpening type ring tooth impregnated diamond drill bit, the defects that a traditional diamond drill bit for boring hard rock is not high in mechanical drill speed and is shorter in service life are overcome. The drill bit at least comprises a cylindrical drill bit body, wherein 2-16 arc-shaped cutting blocks are embedded in the top of the drill bit body along the circumferential direction; the heights of the cutting blocks are identical; cross sections of the cutting blocks are of sector shapes; the top surface of each cutting block is a work lip surface; 3-10 arc-shaped cutting teeth are arranged on each work lip surface; longitudinal sections of the cutting blocks provided with the cutting teeth are of comb shapes; top sides of the cutting teeth are arranged at sharp parts of the tops of the longitudinal sections; the circumference where the top side of any cutting tooth on each cutting block is positioned is concentric with the circumference where the cutting block is positioned; vertex angles of the cutting teeth are 50-120 degrees; in addition, the vertex angles of the cutting teeth on the different cutting blocks positioned on the same circumference are different from one another.

Description

technical field [0001] The invention provides a diamond drill bit used for drilling in medium-hard rock to very hard rock, in particular to a self-sharpening ring tooth impregnated diamond drill bit, which belongs to the field of geological exploration drilling. Background technique [0002] At present, in medium hardness and hard rock drilling in geological exploration, the selection of drill bits generally adopts impregnated diamond drill bits. Since the rock formation is of medium hardness and hard rock, and the drillability level is high, the diamond drill bit shows the characteristics of difficult diamond cutting, low mechanical penetration rate and low drill bit life during the working process at the bottom of the hole. Therefore, in order to improve the ROP and the life of the drill bit, the lip surface structure of the conventional drill bit can be changed, and a new lip surface structure can be proposed to improve the effect of the drill bit on breaking rocks at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/56
Inventor 段隆臣契霍特金V.F汤凤林李大昌庞丰
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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