CN-224214121-U - Polycrystalline diamond compact with special-shaped structure

CN224214121UCN 224214121 UCN224214121 UCN 224214121UCN-224214121-U

Abstract

The utility model belongs to the field of superhard composite materials, and particularly relates to a polycrystalline diamond compact of a special-shaped structure, wherein a non-circular convex frame is arranged at the top of a polycrystalline diamond layer, at least two angles are arranged on the non-circular convex frame, each angle extends to the periphery of the polycrystalline diamond layer to form a convex strip, an inclined concave surface is formed between the outer edge of the polycrystalline diamond layer and the non-circular convex frame due to the fact that adjacent convex strips are concave downwards at the outer edge of the polycrystalline diamond layer, a cutting surface is arranged at the connecting position of the convex strips and a side cylindrical surface of the polycrystalline diamond layer, the cutting surface comprises an upper cutting surface and a side cutting surface, the upper cutting surface is positioned on the upper surface of the convex strips, the side cutting surface is positioned on two sides of the convex strips and corresponds to the side cutting surface, and the 4D action position of the multi-surface structure has excellent impact resistance and rock breaking property, cutting pressure is concentrated in a specific area due to optimization of geometric shapes, cutting efficiency is improved, and the service life of the polycrystalline diamond compact is prolonged.

Inventors

WEI WENLIANG
HUANG KAI
LI ZHIHAI
WANG JINJIE
ZHANG JUNXIA

Assignees

河南晶锐新材料股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250613

Claims (9)

1. The polycrystalline diamond compact comprises a hard alloy substrate and a polycrystalline diamond layer connected to the hard alloy substrate, and is characterized in that a non-circular convex frame is arranged at the top of the polycrystalline diamond layer, at least two angles are arranged on the non-circular convex frame, each angle extends to the periphery of the polycrystalline diamond layer to form a convex strip, an inclined concave surface is formed between the outer edge of the polycrystalline diamond layer and the non-circular convex frame due to the fact that adjacent convex strips are concave at the outer edge of the polycrystalline diamond layer, cutting surfaces are arranged at the connecting positions of the convex strips and the side cylindrical surfaces of the polycrystalline diamond layer, each cutting surface comprises an upper cutting surface and a side cutting surface, the upper cutting surface is located on the upper surface of each convex strip, the side cutting surfaces are located on two sides of each convex strip, and the upper cutting surfaces correspond to the side cutting surfaces.
2. The polycrystalline diamond compact of claim 1, wherein the outline of the non-circular flange is square, or square star, or diamond, or triangle.
3. The polycrystalline diamond compact of claim 2, wherein the concave interior of the non-round bezel is provided with a second concave bottom surface.
4. A shaped construction polycrystalline diamond compact according to claim 3, wherein the second concave-down surface is in inscribed relationship with the non-circular flange.
5. The polycrystalline diamond compact of claim 1, wherein the angle between the upper cutting surface and the side cutting surface is greater than or equal to 130 degrees, the angle between two corresponding side cutting surfaces of the same upper cutting surface is greater than or equal to 35 degrees, and the angle between the upper cutting surface of the same upper cutting surface and the upper surface of the non-circular flange is greater than or equal to 12 degrees.
6. The polycrystalline diamond compact of special-shaped structure of claim 2, wherein the bottom of the inner concave of the non-circular convex frame is a plane or a curved surface, and the concave depth of the inner concave of the non-circular convex frame is more than or equal to 0.2mm.
7. The polycrystalline diamond compact of claim 1, wherein the vertical distance from the center point of the top end of the inclined concave surface to the non-circular convex frame is greater than or equal to 1.5 mm.
8. The polycrystalline diamond compact of claim 7, wherein the inclined concave surface has an included angle of 25 ° or more with the non-circular flange.
9. The polycrystalline diamond compact of a special configuration of claim 1, wherein the bottom of the inclined concave surface is planar or curved.

Description

Polycrystalline diamond compact with special-shaped structure Technical Field The utility model belongs to the field of superhard composite materials, and particularly relates to a polycrystalline diamond compact with a special-shaped structure. Background The polycrystalline diamond compact is formed by sintering high-quality diamond and a hard alloy matrix through a high-temperature high-pressure (HTHP) process, and has high hardness and high wear resistance of the diamond and high impact resistance of the hard alloy, and the excellent comprehensive performance of the polycrystalline diamond compact is considered as an ideal drilling material. As drilling depths increase, drilling formations become harder and more complex in construction, and demands on impact resistance of the polycrystalline diamond compact become higher. In the prior art, a special-shaped structure is performed on a composite layer of a polycrystalline diamond compact to improve the shock resistance of the polycrystalline diamond compact, for example, the utility model patent with the patent number of CN 213330910U discloses a diamond compact and a drill bit for plastic stratum, a concave part is arranged at the center of a diamond layer of the diamond compact along the axial direction of a matrix, the concave part adopts a spherical design, the circular outline is uniformly stressed, the cutting pressure is dispersed, the partial cutting force is insufficient, the footage speed is influenced, and the diamond compact is easy to damage. Disclosure of utility model Aiming at the technical problems of insufficient impact resistance and easy damage of the polycrystalline diamond compact, the utility model aims to provide the polycrystalline diamond compact with the special-shaped structure. The utility model adopts the following technical scheme: The polycrystalline diamond compact comprises a hard alloy substrate and a polycrystalline diamond layer connected to the hard alloy substrate, wherein a non-circular convex frame is arranged at the top of the polycrystalline diamond layer, at least two angles are arranged on the non-circular convex frame, each angle extends to the periphery of the polycrystalline diamond layer to form a convex strip, an inclined concave surface is formed between the outer edge of the polycrystalline diamond layer and the non-circular convex frame due to the fact that the outer edge of the polycrystalline diamond layer is concave between adjacent convex strips, a cutting surface is arranged at the connecting position of the convex strips and the side cylindrical surface of the polycrystalline diamond layer, the cutting surface comprises an upper cutting surface and a side cutting surface, the upper cutting surface is located on the upper surface of the convex strips, the side cutting surface is located on two sides of the convex strips, and the upper cutting surface corresponds to the side cutting surface. The outline of the non-circular convex frame is square, or is in a quadrangle star shape, or is in a diamond shape, or is in a triangle shape. The second concave surface is arranged in the concave of the non-circular convex frame. The second concave surface and the non-circular convex frame are in inscription relation. The included angle between the upper cutting surface and the side cutting surface is more than or equal to 130 degrees, the included angle between the two side cutting surfaces corresponding to the same upper cutting surface is more than or equal to 35 degrees, and the included angle between the same upper cutting surface and the upper surface of the non-circular convex frame is more than or equal to 12 degrees. The bottom of the inner concave of the non-circular convex frame can be a plane or a curved surface, and the concave depth of the inner concave of the non-circular convex frame is more than or equal to 0.2 mm. The vertical distance from the center point of the top end of the inclined concave surface to the non-circular convex frame is more than or equal to 1.5 mm. The included angle between the inclined concave surface and the non-circular convex frame is more than or equal to 25 degrees. The bottom of the inclined concave surface is a plane or a curved surface. Compared with the prior art, the utility model has the beneficial effects that: The utility model provides a polycrystalline diamond compact with a special-shaped structure, which has excellent impact resistance and rock breaking property through a 4D action part with a multi-surface structure, and the cutting pressure is concentrated in a specific area through the optimization of geometric shapes, so that the cutting efficiency is improved, the service life of the compact is prolonged, the overall stability is improved, and a plurality of changes of a structural style can provide wider selectivity for customers so as to fully adapt to the complexity of underground stratum. Drawings Fig. 1 is a schematic structural view of the pres