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Rotatable polycrystalline diamond composite tooth and drill bit with same

A technology of polycrystalline diamond and composite teeth, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and mining, etc., can solve the problems of poor impact resistance and short service life of polycrystalline diamond composite teeth, so as to avoid premature failure, Prevents severe wear and improves utilization

Pending Publication Date: 2020-05-15
桂林星钻超硬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the problem that the existing rotatable polycrystalline diamond composite teeth have poor overall impact resistance and short service life, and provide a rotatable polycrystalline diamond composite tooth and its drill bit

Method used

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  • Rotatable polycrystalline diamond composite tooth and drill bit with same
  • Rotatable polycrystalline diamond composite tooth and drill bit with same
  • Rotatable polycrystalline diamond composite tooth and drill bit with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A rotatable polycrystalline diamond composite tooth 1 is mainly composed of a cemented carbide matrix 1-1 and a polycrystalline diamond layer 1-2. The polycrystalline diamond layer 1-2 is compounded on the upper surface of the cemented carbide substrate 1-1, and the two are sintered together by means of high temperature and high pressure. The shape of the upper surface of the polycrystalline diamond layer 1-2 is designed according to needs, such as a plane, arc or helmet-shaped surface. The lower surface of the cemented carbide substrate 1-1 can be designed as required, such as a plane or an arc. In a preferred embodiment of the present invention, for convenience of description, the upper surface of the polycrystalline diamond layer 1-2 and the lower surface of the cemented carbide substrate 1-1 are both planes.

[0032]In order to realize the rotation of the polycrystalline diamond composite tooth 1, the center of the lower surface of the cemented carbide substrate 1-...

Embodiment 2

[0036] A rotatable polycrystalline diamond composite tooth 1 is mainly composed of a polycrystalline carbide matrix 1-1, a polycrystalline diamond layer 1-2 and a wear-resistant layer 1-3. The polycrystalline diamond layer 1-2 is compounded on the upper surface of the cemented carbide substrate 1-1, and the wear-resistant layer 1-3 is compounded on the lower surface of the cemented carbide substrate 1-1, and the three are sintered together by means of high temperature and high pressure. The shape of the upper surface of the polycrystalline diamond layer 1-2 is designed according to needs, such as a plane, arc or helmet-shaped surface. The lower surface of the wear-resistant layer 1-3 can be designed as required, such as a plane or an arc. In a preferred embodiment of the present invention, for convenience of description, the upper surface of the polycrystalline diamond layer 1-2 and the lower surface of the wear-resistant layer 1-3 are both planes.

[0037] In order to realiz...

Embodiment 3

[0040] see Figure 7-8 , a drill bit, including a drill bit body 2, N polycrystalline diamond composite teeth 1 and N metal balls 3.

[0041] The drill bit body 2 is substantially the same as the existing structure, that is, the drill bit body 2 is provided with N mounting holes 2-1 for the installation of the polycrystalline diamond composite teeth 1, and the number and size of the mounting holes 2-1 are the same as those of the polycrystalline diamond composite teeth. The size of tooth 1 matches. The shape of the bottom surface of the mounting hole 2-1 matches the shape of the bottom surface of the polycrystalline diamond composite tooth 1. For example, when the bottom surface of the polycrystalline diamond composite tooth 1 is convex arc-shaped, the bottom surface of the mounting hole 2-1 is also concave arc-shaped. ; If the bottom surface of the polycrystalline diamond composite tooth 1 is concave arc-shaped, the bottom surface of the mounting hole 2-1 is also convex arc-...

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Abstract

The invention discloses a rotatable polycrystalline diamond composite tooth and a drill bit with same. A cambered-surface concave hole is formed in the bottom of the polycrystalline diamond compositetooth, the polycrystalline diamond composite tooth is connected with a drill bit body together through a metal ball, and then fixed by a baffle in front of the polycrystalline diamond composite tooth,so that the radial flexible rotation and the axial direction limited rotation of the polycrystalline diamond composite tooth in a mounting hole can be achieved; the flexibility of the radial rotationcan enable the edges of the top surface of the polycrystalline diamond layer of the whole polycrystalline diamond composite tooth to all participate in the cutting operation so as to improve the utilization rate of the whole polycrystalline diamond composite tooth, which not only can keep fast drilling of the polycrystalline diamond composite drill bit to the greatest extent, but also can avoid the premature failure of the polycrystalline diamond composite tooth; the limited rotation of the axial direction can effectively buffer the impact of external force on a polycrystalline diamond composite sheet, so that the impact resistance of the polycrystalline composite tooth is greatly improved, and the service life of the polycrystalline diamond composite tooth is improved.

Description

technical field [0001] The invention relates to the technical field of polycrystalline diamond composite drill bits, in particular to a rotatable polycrystalline diamond composite tooth and a drill bit thereof. Background technique [0002] Polycrystalline diamond composite drill bits are widely used in the fields of petroleum, coal and various mineral mining and geological exploration due to their high wear resistance and high impact resistance. With the development and progress of society, people's demand for various types of oil, coal, and mineral resources is also increasing, and market competition has made various companies put forward higher requirements for resource mining and drilling costs. The service life and drilling speed requirements of the drill bit are also getting higher and higher. [0003] At present, the polycrystalline diamond composite drill bits used in petroleum, coal and various mineral mining and geological exploration are mainly composed of a dril...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/54E21B10/43
CPCE21B10/54E21B10/43
Inventor 莫铭忠莫一君张玉荣
Owner 桂林星钻超硬材料有限公司
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