CN210637044U

CN210637044U - Multi-curved-surface high-toughness sharp PDC

Info

Publication number: CN210637044U
Application number: CN201921432761.9U
Authority: CN
Inventors: 张钲; 陈强; 王恒
Original assignee: Zhengzhou Haocheng Superhard Tool Co ltd; Henan Yalong Diamond Tools Co ltd
Current assignee: Zhengzhou Haocheng Superhard Tool Co ltd; Henan Yalong Diamond Tools Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-29
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a multi-curved surface high-toughness sharp PDC, which effectively solves the problems of insufficient sharpness, poor impact resistance, short service life and incapability of meeting the requirements of complex bottom exploration and exploitation of the traditional PDC; the technical scheme is as follows: the hard alloy substrate is fixed with a polycrystalline diamond layer, the middle part of the upper surface of the polycrystalline diamond layer is provided with a convex spherical surface, the edges of two ends of the upper surface of the polycrystalline diamond layer are wave-shaped curved surfaces, and the height of the convex spherical surface is less than or equal to that of the wave-shaped curved surface; the utility model discloses can reduce the area of contact of PDC with the rock, improve the holistic sharpness of PDC, still increase the chip removal ability simultaneously and can increase substantially and creep into efficiency and reduce the mud bag phenomenon, the exploration or the resource development that the stratum that is used for the height hard and contain the garrulous gravel goes on more.

Description

Multi-curved-surface high-toughness sharp PDC

Technical Field

The utility model relates to a superhard materials field, concretely relates to many curved surfaces high tenacity sharp type PDC.

Background

Along with the increasingly high requirements on the wear resistance, impact resistance and the like of drilling equipment in the fields of geological exploration, coal field excavation, oil gas exploitation and the like, diamond compact (PDC) is increasingly widely applied to the fields due to the excellent performance of the PDC. In the current drilling process, due to the fact that the complexity of soil and stratum is gradually improved, the drilling efficiency and the shock resistance of a traditional product cannot meet the use requirements, and particularly in the high-hardness stratum containing broken gravels, a higher standard is provided for the performance of a drilling part.

Although the wear resistance of the traditional PDC is obviously superior to that of other products, the traditional PDC has poor cutting soil angle, large contact area and unsmooth soil chip removal, so that the cutting resistance of the traditional PDC in drilling is often large, and the wear resistance is poor, the wear is fast and the drilling rate is low; in order to improve the cutting capability of some manufacturers, the impact resistance of PDC products is insufficient due to the fact that the diamond micro powder grain size ratio is changed on the surface of each diamond chip, and in a stratum containing broken gravels, when the stratum receives a large impact force, the stratum is damaged quickly, the service life is short, and the economic effect is poor. In conclusion, the traditional PDC cannot meet the requirements of complex stratum exploration and exploitation generally due to insufficient sharpness and impact resistance.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that traditional PDC sharpness is not enough, and shock resistance is poor, the life-span is short, and can not satisfy the requirement of complicated bottom exploration, exploitation, for solving above-mentioned problem, the utility model provides a many curved surfaces high tenacity sharp type PDC.

The purpose of the utility model is realized with the following mode: the hard alloy substrate is fixed with a polycrystalline diamond layer, the middle part of the upper surface of the polycrystalline diamond layer is a convex spherical surface, the edges of two ends of the upper surface of the polycrystalline diamond layer are wavy curved surfaces, and the height of the convex spherical surface is less than or equal to that of the wavy curved surfaces.

Compared with the prior art, the utility model can optimize the polycrystalline diamond layer of the PDC into a multi-curved-surface structure, and the design of the side wavy curved surface reduces the contact area of the PDC and the rock, improves the overall sharpness of the PDC and simultaneously increases the chip removal capacity; the spherical bulge design at the center ensures that the PDC is more reasonably stressed when being subjected to impact force, enhances the impact toughness of the PDC and ensures the stability of a drilling platform. The method can greatly improve the drilling efficiency and reduce the mud pocket phenomenon, and is mainly used for exploration or resource development of high-hardness stratum containing broken gravels.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

The polycrystalline diamond coating comprises 1, a polycrystalline diamond layer, 2, a hard alloy matrix and 3, and a convex spherical surface.

Detailed Description

As shown in the attached drawing, the utility model comprises a substrate 2, a polycrystalline diamond layer 1 is fixed on the substrate 2, the middle part of the upper surface of the polycrystalline diamond layer 1 is composed of a plurality of convex spherical surfaces 3, and the convex spherical surfaces 3 not only enhance the impact toughness of the PDC, but also enhance the service life of the PDC; the edges of the two ends of the upper surface of the polycrystalline diamond layer 1 are wavy curved surfaces, the contact area of the PDC and rock is reduced by the wavy curved surfaces, the integral sharpness of the PDC is improved, the chip removal capacity is increased, the height of the convex spherical surface 3 is smaller than or equal to that of the wavy curved surfaces, and the cutting effect of the wavy curved surfaces is guaranteed.

The substrate 2 is made of hard alloy materials.

The diameter of the PDC is 16.00mm, the overall height is 13.20mm, and the thickness of the polycrystalline diamond layer 1 is 2.8 mm.

The transition surface between the convex spherical surface and the wavy curved surface and the outer extension surface of the polycrystalline diamond layer 1 is a concave surface.

The convex spherical surface 3 is ellipsoidal, the number of the spherical surfaces is 4, and the area of the convex spherical surface 3 accounts for 1/3 of the polycrystalline diamond surface.

The wave-shaped curved surface consists of 2 wave crests which are uniformly distributed, and the distance between the wave crest of the wave-shaped curved surface and the wave trough of the adjacent wave-shaped curved surface is 1.0 mm.

And a chamfer of 0.3 × 45 degrees is machined on the outer circle of the polycrystalline diamond layer 1.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. The utility model provides a many curved surfaces high tenacity sharp type PDC which characterized in that: the hard alloy diamond coating comprises a hard alloy substrate (2), wherein a polycrystalline diamond layer (1) is fixed on the hard alloy substrate (2), the middle part of the upper surface of the polycrystalline diamond layer (1) is composed of a convex spherical surface (3), the edges of two ends of the upper surface of the polycrystalline diamond layer (1) are wavy curved surfaces, and the height of the convex spherical surface (3) is less than or equal to that of the wavy curved surfaces.

2. The multi-curved, high toughness sharpened PDC of claim 1, wherein: the convex spherical surface and the edge are wavy curved surfaces and the transition between the outer extending surfaces of the polycrystalline diamond layer (1) is a concave surface, and the radius of the concave surface is 0.1-10 mm.

3. The multi-curved surface high toughness sharp PDC of claim 1 or 2 wherein: the convex spherical surface (3) is in a regular spherical shape or an ellipsoidal shape, and the spherical radius R is 1/16R-5R of the PDC radius R.

4. The multi-curved, high toughness sharpened PDC of claim 1, wherein: the PDC is characterized in that the wavy curved surfaces are uniformly distributed on the edge of the PDC, the number of wave crests is 2-6, and the distance between the wave crest of each wavy curved surface and the wave trough of the adjacent wavy curved surface is 0.5-1.5 mm.

5. The multi-curved, high toughness sharpened PDC of claim 1, wherein: and a chamfer is processed on the excircle of the polycrystalline diamond layer (1).