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Spiral PDC drill bit with detachable cutting teeth

A technology of cutting teeth and drill bits, which is applied to drill bits, drilling equipment, earthwork drilling and production, etc., to achieve the effect of reducing difficulties and saving costs

Inactive Publication Date: 2016-12-07
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this problem has not been fundamentally solved, and the wasteful situation of wearing one place and replacing the whole can not be avoided, and the effect of making drilling easier in the face of different working conditions, so its structure can be further designed

Method used

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  • Spiral PDC drill bit with detachable cutting teeth
  • Spiral PDC drill bit with detachable cutting teeth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Below in conjunction with accompanying drawing, illustrate the new structure drill bit that the present invention proposes, feature, effect, describe in detail as follows;

[0020] The PDC drill bit mainly includes an integrated cutting tooth 3 , a tapered cutter 2 and a cutter wing 1 .

[0021] The blade 1 and the bit body are integrated, and there is a threaded hole on the blade 1. The integrated cutting tooth 1 is threadedly connected with the threaded hole, which makes the integrated cutting tooth 1 can be disassembled from the bit body separately. In the process of drilling coal and rock, because the drill bit drills into the coal seam through shearing and drilling pressure to achieve drilling into the coal seam, it is easy to be worn or damaged. When this happens, the damaged integrated The cutting teeth 3 are replaced, so that the drill bit has flexibility, and the service life and working efficiency of the drill bit are improved to a large extent.

[0022] The ...

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Abstract

The invention discloses an externally spiral PDC drill bit (see the corresponding figure) with replaceable cutting teeth and provides a spiral PDC drill bit with detachable cutting teeth. The spiral PDC drill bit mainly comprises the integrated cutting teeth (see the corresponding figure) and taper cutters, and is characterized in that the cutting teeth of the drill bit can be in threaded connection with threaded holes in cutter blades so that the abraded cutting teeth can be replaced; the outline of each cutter blade is in a spiral shape, and by means of the structure, drilling is easy to implement in the drilling process; and the three taper cutters (being zero degree in the figure) are welded to the center portion of the drill bit, and the structure of the taper cutters is beneficial to reducing drilling resistance in the drilling process. According to the drill bit, the drilling resistance is reduced, so that the drilling process is easier to implement, the problem that a whole drill bit has to be abandoned no matter which cutting tooth is broken down is solved fundamentally, cost is reduced, and the work efficiency is further improved.

Description

technical field [0001] The invention belongs to the field of coal and rock drilling with a PDC drill bit, and in particular relates to a drill bit which functions as a detachable cutting tooth. Background technique [0002] As we all know, during the coal and rock drilling process of PDC, due to various reasons, a certain cutting tooth of the drill bit will be worn and the work efficiency will be reduced. Normal cutters go to waste. And through many years of drill bit usage, it is also found that when the coal rock is run into in the drilling process, it will be difficult to drill when there are different working conditions such as sundries, hard objects, and coal seams, and even cause the work to stop. Patent No. CN204827244U, this drill bit not only improves the service life of the drill bit, but also reduces the drilling frequency, solves the serious wear of the cutting teeth of the existing drill bit, especially the abnormal wear, which causes the drill bit to work abno...

Claims

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Application Information

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IPC IPC(8): E21B10/43E21B10/44E21B10/54
CPCE21B10/43E21B10/44E21B10/54
Inventor 罗晨旭荆双喜韩晓明赵武冷军发华伟李新华王世峰史显磊王福荣
Owner HENAN POLYTECHNIC UNIV
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