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Drill bit

A drill bit and head technology, which is applied in the field of rock drilling tools, can solve the problems of rock dust at the bottom of the hole, drill bit damage, micro-cracks, etc., and achieve the effects of reducing heat accumulation, improving service life, and preventing accumulation

Pending Publication Date: 2021-08-27
湖北五环欧科制造技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The depth of a single hole in construction is usually more than ten meters or even hundreds of meters. As the drilling depth increases, it becomes more and more difficult for the rock powder at the bottom of the hole to be discharged from the bottom of the hole, which will cause the following problems: The repeated crushing of the rock powder and the friction between the rock powder and the hole wall generate heat, which generates high temperature and conducts to the circumference of the head; Stress concentration and soft points, coupled with continuous impact force, will produce micro-cracks, resulting in damage to the drill bit

Method used

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Embodiment 1

[0032] Such as Figure 1-3 , a drill bit, the drill bit 10 includes a head 11, the head 11 is provided with a first cone surface 12; the first cone surface 12 is provided with a first rock-breaking unit 13; The rock unit 13 completes the cutting of the outer rock at the bottom of the hole by the rotation of the drill bit 10 around its first axis O1; the first generatrix E of the first conical surface 12 forms a first included angle a with the end surface of the head 11; perpendicular to The section F of the second axis O2 of the first rock-breaking unit 13 forms a second angle b with the end surface of the head 11; and the value of the first angle a is always greater than the value of the second angle b; all the individual The second axis O2 of the first rock-breaking unit 13 is respectively in the same plane as the first axis O1 of the drill bit 10 ; By adopting the above drill bit structure and the corresponding angle value, the frictional hot spot of the first rock-breakin...

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Abstract

The invention relates to a drill bit which comprises a head, and a first conical surface is arranged on the head; a first rock breaking unit is arranged on the first conical surface; and the first rock breaking unit completes cutting of rock on the outer ring of the hole bottom through rotation of the drill bit around the first axis of the first rock breaking unit. The drill bit can effectively reduce heat accumulation on the periphery of the head of the drill bit in the working process, early cracks are avoided, the quality of the drill bit is guaranteed, and the service life of the drill bit is effectively prolonged.

Description

technical field [0001] The invention belongs to the field of rock drilling tools, in particular to a drill bit. Background technique [0002] The drill bit is a common rock drilling tool. When it works, it directly contacts the rock formation, transmits the shock wave to the rock formation, and is the execution part for the rock breaking action. During rock drilling, the drill bit is not only subjected to the downward impact force provided by the outside, but also driven by the drilling rig for rotary motion. The end face and the edge cone of the commonly used drill bit are provided with a crushing unit, which is usually a cemented carbide column tooth, and the axis of the edge carbide column tooth of the drill head is perpendicular to the generatrix of the edge cone surface. The drill bit is also provided with a central air hole and a top air hole, which can introduce the compressed gas supplied from the outside into the bottom of the hole and blow the rock powder out of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/00E21B10/43E21B10/54E21B3/02
CPCE21B10/00E21B10/43E21B10/54E21B3/02
Inventor 龚维龚康强
Owner 湖北五环欧科制造技术有限公司
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