CN213392001U

CN213392001U - Special-shaped triangular-toothed diamond compact

Info

Publication number: CN213392001U
Application number: CN202022468656.XU
Authority: CN
Inventors: 陈本富; 朱伟
Original assignee: Chongqing Beisika New Material Co ltd
Current assignee: Chongqing Beisika New Material Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-06-08
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to a three prismatic teeth diamond compact pieces of dysmorphism, including carbide basement and polycrystalline diamond layer, its characterized in that: the polycrystalline diamond layer is composed of a top central surface and a side cylindrical surface, the top central surface is an outer spherical surface, a plurality of upward convex linear cutting edges are radially arranged above the top central surface along the horizontal section of the top central surface, and the linear cutting edges are symmetrically distributed along the central point of the top central surface; the highest point of the outer end of the linear cutting edge and the top of the top central plane are positioned in the same plane; the straight cutting edge is smoothly connected with the top center surface through the inclined cutting surface, and the intersecting line of the inclined cutting surface and the side cylindrical surface forms a curved cutting edge. The utility model discloses simple structure, reasonable in design, sintered carbide basement and polycrystalline diamond layer combine firmly under the high temperature high pressure, have improved shock resistance, and polycrystalline diamond layer has a plurality of cutting edges and cutting face simultaneously, has better shock resistance and chip removal performance, has improved and has crept into efficiency.

Description

Special-shaped triangular-toothed diamond compact

Technical Field

The utility model relates to a three triangular teeth diamond compact of dysmorphism belongs to diamond compact technical field.

Background

The diamond compact consists of two parts, namely a diamond layer and a hard alloy substrate. The diamond powder is prepared by sintering fine diamond powder and a hard alloy matrix under the conditions of ultrahigh pressure and high temperature (5-7 ten thousand atmospheric pressure, 1400 ℃ C. and 1600 ℃ C.). The diamond composite sheet is mainly suitable for diamond composite sheet drill bits (PDC drill bits) which are used for drilling soft to medium-hardness and complex geological layers and is mainly used for petroleum and natural gas exploitation. The diamond grains in the polycrystalline diamond layer have complete D-D bond combination microscopic characteristics, so that the diamond layer has high strength, high hardness and high wear resistance, and simultaneously has good self-sharpening performance, and a new cutting surface can be continuously exposed in the grinding process, so that the effective cutting effect on rocks is kept. The structure of the existing diamond compact is not optimized enough, the cutting effect is not ideal enough, and meanwhile, the connection of a diamond compact drill bit is not firm enough.

SUMMERY OF THE UTILITY MODEL

To the above problem, the to-be-solved technical problem of the utility model is to provide a three prismatic tooth diamond compact pieces of dysmorphism has end face cutting edge and a plurality of cutting plane, and intensity is high, and the wearability is good, and cutting performance is good.

The utility model discloses a three prismatic teeth diamond compact pieces of dysmorphism, including carbide basement and polycrystalline diamond layer, the carbide basement is cylindrical, and its upper end sintering has polycrystalline diamond layer, its characterized in that: the polycrystalline diamond layer is composed of a top central surface and a side cylindrical surface, the top central surface is an outer spherical surface, a plurality of upward convex linear cutting edges are radially arranged above the top central surface along the horizontal section of the top central surface, and the linear cutting edges are symmetrically distributed along the center of the top central surface; the outer end point of the linear cutting edge is higher than the inner end point, the inner end points are not connected, and the highest point of the outer end of the linear cutting edge and the top of the top central plane are positioned in the same horizontal plane; the straight cutting edge is smoothly connected with the top center surface through an inclined cutting surface, and the intersection line of the inclined cutting surface and the side cylindrical surface forms a curved cutting edge; the oblique cutting surface is smoothly connected with the side cylindrical surface, and the oblique cutting surface is smoothly connected with the top center surface.

Furthermore, the included angle between the inclined cutting surface and the horizontal plane ranges from 27 degrees to 30 degrees.

Furthermore, the included angle range of the linear cutting edge and the horizontal plane is 2-5 degrees.

Further, the number of the linear cutting edges is 3.

Furthermore, the surfaces of the linear cutting edge and the curved cutting edge are both arc-shaped, and the curvature radius of the arc-shaped cutting edge is 0.27-0.33 mm.

The utility model has the advantages that: simple structure, reasonable in design, the sintered carbide basement and polycrystalline diamond layer combine more firmly under the high temperature high pressure, have improved diamond compact's impact strength, and polycrystalline diamond layer has a plurality of cutting edges and cutting face simultaneously, has better shock resistance and chip removal performance, has improved and has crept into efficiency.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.

Fig. 2 is a schematic front view of the preferred embodiment of the present invention.

Fig. 3 is a schematic top view of the preferred embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments and accompanying drawings.

The utility model provides a dysmorphism triangular teeth diamond compact as shown in fig. 1 to 3, includes carbide substrate 2 and polycrystalline diamond layer 1, carbide substrate 2 is cylindrical, and its upper end is sintered and is had polycrystalline diamond layer 1, its characterized in that: the polycrystalline diamond layer 1 is composed of a top central plane 101 and a side cylindrical surface 105, the top central plane 101 is an outer spherical surface, a plurality of straight cutting edges 102 protruding upwards are radially arranged above the top central plane 101 along the horizontal section of the top central plane, and the straight cutting edges 102 are symmetrically distributed along the center of the top central plane 101; the outer end point of the linear cutting edge 102 is higher than the inner end point, the inner end points are not connected, and the highest point of the outer end of the linear cutting edge 102 and the top point of the top central plane 101 are positioned in the same horizontal plane; the straight cutting edge 102 and the top central surface 101 are smoothly connected through an inclined cutting surface 103, and the intersection line of the inclined cutting surface 103 and the side cylindrical surface 105 forms a curved cutting edge 104; the inclined cutting surface 103 is smoothly connected with the side cylindrical surface 105, and the inclined cutting surface 103 is smoothly connected with the top center surface 101.

Further, the angle α between the inclined cutting surface 103 and the horizontal plane is 28.63 °.

Further, the angle β between the linear cutting edge 102 and the horizontal plane is 3.46 °.

Further, the number of the linear cutting edges 102 is 3.

Further, the surfaces of the linear cutting edge 102 and the curved cutting edge 104 are both arc-shaped, and the curvature radius is 0.3 mm.

The utility model discloses a diamond compact, when using, diamond compact cutting gets into the rock layer, and the side plane 103 sharp cutting edge 106 on the polycrystalline diamond layer 1 and first curve cutting edge 107 at first contact with the stratum rock participate in the cutting, and the inner cylinder surface 104 of side plays good drainage chip removal effect, further improves and creeps into efficiency. With the increase of the drilling depth, the inner cylindrical surface 104, the second curved cutting edge 108 and the polycrystalline diamond side cylindrical surface 103 contact the rock stratum, participate in the cutting process, and in the abrasion process of the two cutting planes, new surfaces continue to participate in the cutting, so that the drilling efficiency is improved. Many cutting edges and a plurality of cutting face participate in the cutting simultaneously, and structural axial symmetry has improved the intensity of diamond compact piece, avoids the inefficacy that arouses because of stress concentration in the cutting process, increase of service life.

The utility model discloses a diamond compact, when using, diamond compact cutting gets into the rock layer, the top central plane 101 on polycrystalline diamond layer 1's summit and sharp cutting edge 102, at first contact with the stratum rock, participate in the cutting, the side cutting face 102 of side, side cylinder 105 play good drainage chip removal effect, further improve and creep into efficiency. As the drilling depth increases, the side cutting surface 103, the curved cutting edge 104 and the polycrystalline diamond side cylindrical surface 105 contact the rock formation, participate in the cutting process, and when the side cutting surface 103 is worn, a new surface continuously participates in the cutting, so that the drilling efficiency is improved. Many cutting edges and a plurality of cutting face participate in the cutting simultaneously, and structure central symmetry has improved the intensity of diamond compact piece, avoids the inefficacy that arouses because of stress concentration in the cutting process, increase of service life.

The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a three prismatic teeth diamond compact pieces of dysmorphism, includes carbide substrate and polycrystalline diamond layer, the carbide substrate is cylindrical, and its upper end has sintered polycrystalline diamond layer, its characterized in that: the polycrystalline diamond layer is composed of a top central surface and a side cylindrical surface, the top central surface is an outer spherical surface, a plurality of upward convex linear cutting edges are radially arranged above the top central surface along the horizontal section of the top central surface, and the linear cutting edges are symmetrically distributed along the center of the top central surface; the outer end point of the linear cutting edge is higher than the inner end point, the inner end points are not connected, and the highest point of the outer end of the linear cutting edge and the top of the top central plane are positioned in the same horizontal plane; the straight cutting edge is smoothly connected with the top center surface through an inclined cutting surface, and the intersection line of the inclined cutting surface and the side cylindrical surface forms a curved cutting edge; the oblique cutting surface is smoothly connected with the side cylindrical surface, and the oblique cutting surface is smoothly connected with the top center surface.

2. The profiled triangular-toothed diamond compact of claim 1, wherein: the included angle between the inclined cutting surface and the horizontal plane ranges from 27 degrees to 30 degrees.

3. The profiled triangular-toothed diamond compact of claim 1, wherein: the included angle range of the linear cutting edge and the horizontal plane is 2-5 degrees.

4. The profiled triangular-toothed diamond compact of claim 1, wherein: the number of the linear cutting edges is 3.

5. The profiled triangular-toothed diamond compact of claim 1, wherein: the surfaces of the linear cutting edge and the curved cutting edge are both arc-shaped, and the curvature radius of the arc-shaped cutting edge and the curved cutting edge is 0.27-0.33 mm.