CN219138982U - High cutting efficiency diamond compact and drill bit - Google Patents

High cutting efficiency diamond compact and drill bit Download PDF

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Publication number
CN219138982U
CN219138982U CN202320341730.2U CN202320341730U CN219138982U CN 219138982 U CN219138982 U CN 219138982U CN 202320341730 U CN202320341730 U CN 202320341730U CN 219138982 U CN219138982 U CN 219138982U
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trapezoid
inclined plane
cutting inclined
diamond
diamond compact
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涂关富
刘强
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Sinopec Oilfield Equipment Corp
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Kingdream PLC
Sinopec Oilfield Equipment Corp
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00—Accessories for drilling tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The application relates to a high cutting efficiency diamond compact and drill bit, include: the diamond composite layer is arranged at one end of the hard alloy matrix and is connected with the hard alloy matrix into a whole; the diamond composite layer is of an upper-lower layered structure, the bottom of the diamond composite layer is a lower layer cylinder with a set thickness, the top of the diamond composite layer is provided with at least one trapezoid cutting inclined plane protruding upwards, and the trapezoid cutting inclined plane is provided with a diversion trench. The trapezoid cutting inclined plane of the diamond compact with high cutting efficiency has small contact area, large rock breaking stress and more effective stratum penetration compared with a circular plane structure. The diversion trench of the trapezoid cutting inclined plane can enable the diamond compact to have a good cooling effect, and the service life of the diamond compact is prolonged. The trapezoid cutting inclined plane has a certain angle, so that the impact resistance of the diamond compact can be improved, and the aggressiveness and the impact resistance of the diamond compact are balanced.

Description

High cutting efficiency diamond compact and drill bit
Technical Field
The application relates to the technical field of oil drilling, in particular to a diamond compact with high cutting efficiency and a drill bit.
Background
Beginning in the 80 s of the last century, diamond bits were widely used in oil and gas drilling projects. Diamond bits are primarily composed of a bit body and cutting elements, and diamond bits fall into three categories depending on the cutting elements: PDC (polycrystalline diamond) bits, TSP (thermally stable polycrystalline diamond) bits, and natural diamond bits. The PDC drill bit is mainly used for drilling soft to medium hard stratum, and has wider and wider application range and better economic value through continuous technological progress. TSP bits are mainly used for drilling medium to very hard formations. At present, deep well operation in petroleum and natural gas drilling engineering is gradually increased, and stratum encountered by drilling is also more and more complicated.
At present, the main failure modes of the composite sheet mainly comprise abrasion, tooth breakage and heat stability failure, and at present, the Haliberton company has a cutting element with diamond layering and a diamond surface layer with a sharp tooth structure, so that the cutting element has good cutting efficiency, but has weak impact resistance and poor heat stability, so that the cutting element is often mainly subjected to tooth breakage failure and heat stability failure in field application.
Disclosure of Invention
The embodiment of the application provides a diamond compact with high cutting efficiency and a drill bit, which are used for solving the problems of weak impact resistance and poor thermal stability of the compact in the related technology.
A first aspect of embodiments of the present application provides a high cutting efficiency diamond compact, comprising: the diamond composite layer is arranged at one end of the hard alloy matrix and is connected with the hard alloy matrix into a whole;
the diamond composite layer is of an upper-lower layered structure, the bottom of the diamond composite layer is a lower layer cylinder with a set thickness, the top of the diamond composite layer is provided with at least one trapezoid cutting inclined plane protruding upwards, and the trapezoid cutting inclined plane is provided with a diversion trench.
In some embodiments: the projection of the trapezoid cutting inclined plane on the lower layer cylinder is of an isosceles trapezoid structure, the upper bottom of the trapezoid cutting inclined plane extends towards the edge direction of the lower layer cylinder and is coplanar with the side wall of the lower layer cylinder, and the diversion trench is located at the lower bottom of the trapezoid cutting inclined plane and extends towards the center direction of the lower layer cylinder.
In some embodiments: the number of the trapezoid cutting inclined planes is 2-9, and 2-9 trapezoid cutting inclined planes are uniformly distributed on the circumference of the lower layer cylinder.
In some embodiments: the diversion trenches of the trapezoid cutting inclined planes are intersected and communicated at the center of the lower layer cylinder, and the diversion trenches are of concave cambered surface structures with deep centers and shallow edges.
In some embodiments: the two adjacent trapezoid cutting inclined planes are connected through a diamond plane, and the top of the diamond plane is flush with the top of the trapezoid cutting inclined plane;
the side wall of the trapezoid cutting inclined plane is a plane or an arc surface, and the side wall of the trapezoid cutting inclined plane extends downwards in an inclined mode towards the direction of the lower layer cylinder.
In some embodiments: at least one trapezoid cutting inclined plane is parallel to or forms a set angle with the bottom surface of the hard alloy matrix.
In some embodiments: the angle between the trapezoid cutting inclined plane and the bottom surface of the hard alloy substrate is 1-25 degrees, and the height of the trapezoid cutting inclined plane is gradually increased towards the center direction of the hard alloy substrate.
In some embodiments: the angles of the trapezoid cutting inclined planes and the bottom surface of the hard alloy substrate are the same or different.
In some embodiments: the periphery of the hard alloy matrix is provided with a circumferential positioning mark, and the bonding surface between the hard alloy matrix and the diamond composite layer is a plane, a concave-convex surface, a linear groove surface or an annular groove surface.
A second aspect of embodiments of the present application provides a drill bit comprising a high cutting efficiency diamond compact according to any one of the embodiments described above.
The beneficial effects that technical scheme that this application provided brought include:
the embodiment of the application provides a high-cutting-efficiency diamond compact and a drill, wherein the high-cutting-efficiency diamond compact is provided with a cylindrical hard alloy substrate and a diamond composite layer, and the diamond composite layer is arranged at one end of the hard alloy substrate and is connected into a whole; the diamond composite layer is of an upper and lower layered structure, the bottom of the diamond composite layer is a lower layer cylinder with a set thickness, the top of the diamond composite layer is provided with at least one trapezoid cutting inclined plane protruding upwards, and the trapezoid cutting inclined plane is provided with a diversion trench.
Therefore, the trapezoid cutting inclined plane of the high cutting efficiency diamond compact has small contact area, large rock breaking stress and can more effectively eat stratum relative to a circular plane structure. The diversion trench of the trapezoid cutting inclined plane can enable the diamond compact to have a good cooling effect, and the service life of the diamond compact is prolonged. The trapezoid cutting inclined plane has a certain angle, so that the impact resistance of the diamond compact can be improved, and the aggressiveness and the impact resistance of the diamond compact are balanced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1a, 1b, 1c are a perspective view, a top view and a cross-sectional view, respectively, of a first embodiment of the present application.
Fig. 2 is a perspective view of a second embodiment of the present application.
Fig. 3a, 3b, 3c are a perspective view, a top view and a cross-sectional view, respectively, of embodiment three of the present application.
Fig. 4a, 4b, 4c are a perspective view, a top view and a cross-sectional view, respectively, of a fourth embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The embodiment of the application provides a diamond compact with high cutting efficiency and a drill bit, which can solve the problems of weak impact resistance and poor thermal stability of the compact in the related technology.
Referring to fig. 1a, 1b, and 1c, a first embodiment of the present application provides a high cutting efficiency diamond compact, comprising: the diamond composite layer 101 is arranged at one end of the hard alloy matrix 102, and the two are connected into a whole.
The diamond composite layer 101 is of an upper and lower layered structure, the bottom of the diamond composite layer is a lower layer cylinder with the thickness H2 of 1.3mm, three upward-protruding trapezoid cutting inclined planes 103, 104 and 105 are arranged at the top of the diamond composite layer, and the three trapezoid cutting inclined planes 103, 104 and 105 are provided with diversion trenches 109.
The projection of the trapezoid cutting inclined plane on the lower layer cylinder is of an isosceles trapezoid structure, the upper bottom of the trapezoid cutting inclined plane extends towards the edge direction of the lower layer cylinder and is coplanar with the side wall of the lower layer cylinder, and the diversion trench is located at the lower bottom of the trapezoid cutting inclined plane and extends towards the center direction of the lower layer cylinder.
The three trapezoid cutting inclined planes 103, 104 and 105 are uniformly distributed on the circumference of the lower cylinder, the three trapezoid cutting inclined planes 103, 104 and 105 are connected end to end through diamond planes 110, 111 and 112, and the tops of the diamond planes are level with the tops of the trapezoid cutting inclined planes.
The side walls 106, 107, 108 of the three trapezoid cutting inclined planes are plane or arc surfaces, the side walls of the trapezoid cutting inclined planes extend downwards in an inclined mode towards the direction of the lower layer cylinder, and the side walls 106, 107, 108 of the three trapezoid cutting inclined planes form a certain angle theta with the center line of the hard alloy substrate 102.
The diamond compact of this example had a diameter of 15.875mm and a height H1 of 13.2mm. The three trapezoidal cutting chamfer 103, 104, 105 have an angle α of 20 degrees with the bottom plane of the cemented carbide substrate 102, an edge chamfer β of 45 degrees and an edge length L1 of 1mm.
The diversion trenches 109 of the three trapezoid cutting inclined planes are intersected and communicated at the center of the lower layer cylinder, the diversion trenches 109 are of a concave cambered surface structure with deep center and shallow edge, the concave angle delta of the diversion trenches 109 is-5 degrees, and the transition area of the diversion trenches 109 and the trapezoid cutting inclined planes is rounded.
In some alternative embodiments: referring to fig. 2, a second embodiment of the present application provides a high cutting efficiency diamond compact, including: the diamond composite layer 101 is arranged at one end of the hard alloy matrix 102, and the two are connected into a whole.
The diamond composite layer 101 is of an upper and lower layered structure, the bottom is a lower cylinder with the thickness H2 of 1.3mm, four upward-protruding trapezoid cutting inclined planes 203, 204, 205 and 206 are arranged on the top, and the four trapezoid cutting inclined planes 203, 204, 205 and 206 are all provided with diversion trenches 207.
The projection of the trapezoid cutting inclined plane on the lower layer cylinder is of an isosceles trapezoid structure, the upper bottom of the trapezoid cutting inclined plane extends towards the edge direction of the lower layer cylinder and is coplanar with the side wall of the lower layer cylinder, and the diversion trench is located at the lower bottom of the trapezoid cutting inclined plane and extends towards the center direction of the lower layer cylinder.
Four trapezoid cutting inclined planes 203, 204, 205 and 206 are uniformly distributed on the circumference of the lower cylinder, the four trapezoid cutting inclined planes are connected end to end through diamond planes 208, 209, 210 and 211, and the tops of the diamond planes are flush with the tops of the trapezoid cutting inclined planes.
The side walls 212, 213, 214 of the four trapezoid cutting inclined planes are planes or arc surfaces, the side walls of the trapezoid cutting inclined planes extend obliquely downwards towards the direction of the lower layer cylinder, and the side walls 212, 213, 214 of the four trapezoid cutting inclined planes form a certain angle theta with the center line of the cemented carbide substrate 102.
The diamond compact of this example had a diameter of 15.875mm and a height H1 of 13.2mm. The four trapezoidal cutting chamfer surfaces 203, 204, 205, 206 have an angle α of 20 degrees with the bottom plane of the cemented carbide substrate 101, an edge chamfer β of 45 degrees and an edge length L1 of 1mm.
The diversion trenches 207 of the four trapezoid cutting inclined planes are intersected and communicated at the center of the lower layer cylinder, the diversion trenches 209 are of concave cambered surface structures with deep centers and shallow edges, the concave angle delta of the diversion trenches 207 is-5 degrees, and the transition area of the diversion trenches 207 and the trapezoid cutting inclined planes is rounded.
In some alternative embodiments: referring to fig. 3a, 3b, and 3c, a third embodiment of the present application provides a high cutting efficiency diamond compact, comprising: the diamond composite layer 101 is arranged at one end of the hard alloy matrix 102, and the two are connected into a whole.
The diamond composite layer 101 is of an upper and lower layered structure, the bottom is a lower cylinder with the thickness H2 of 1.3mm, four upward-protruding trapezoid cutting inclined planes 303, 304, 305 and 306 are arranged on the top, and the four trapezoid cutting inclined planes 303, 304, 305 and 306 are all provided with diversion trenches 307.
The projection of the trapezoid cutting inclined plane on the lower layer cylinder is of an isosceles trapezoid structure, the upper bottom of the trapezoid cutting inclined plane extends towards the edge direction of the lower layer cylinder and is coplanar with the side wall of the lower layer cylinder, and the diversion trench is located at the lower bottom of the trapezoid cutting inclined plane and extends towards the center direction of the lower layer cylinder.
The four trapezoidal cutting inclined surfaces 303, 304, 305, 306 are divided into two groups, wherein the trapezoidal cutting inclined surfaces 303, 305 are the same type of cutting plane, the angle of the trapezoidal cutting inclined surfaces 303, 305 with the bottom plane of the cemented carbide substrate 102 is alpha, and the edge length of the trapezoidal cutting inclined surfaces 303, 305 is L1.
The trapezoid cutting inclined planes 304 and 306 are a group of cutting inclined planes of the same type, the trapezoid cutting inclined planes 304 and 306 are parallel to the bottom plane of the hard alloy substrate 102, the edge length of the trapezoid cutting inclined planes 304 and 306 is L2, and L2 is more than L1.
The side walls 308, 309, 310, 311 of the four trapezoid cutting slopes are planes or circular arc surfaces, the side walls of the trapezoid cutting slopes extend obliquely downwards in the direction of the lower cylinder, and the side walls 308, 309, 310, 311 of the four trapezoid cutting slopes form a certain angle θ with the center line of the cemented carbide substrate 101.
The diversion trenches 307 of the four trapezoid cutting inclined planes are intersected and communicated at the center of the lower layer cylinder, the diversion trench 309 is of a concave cambered surface structure with a deep center and a shallow edge, the concave angle delta of the diversion trench 307 is-5 degrees, and the transition area of the diversion trench 307 and the trapezoid cutting inclined planes is rounded.
In some alternative embodiments: referring to fig. 4a, 4b, and 4c, a fourth embodiment of the present application provides a high cutting efficiency diamond compact, comprising: the diamond composite layer 101 is arranged at one end of the hard alloy matrix 102, and the two are connected into a whole.
The diamond composite layer 101 is of an upper and lower layered structure, the bottom is a lower cylinder with the thickness H2 of 1.3mm, the top is provided with an upward-protruding trapezoid cutting inclined plane 403, and the trapezoid cutting inclined plane 403 is provided with a diversion trench 404.
The projection of the trapezoid cutting inclined plane on the lower layer cylinder is of an isosceles trapezoid structure, the upper bottom of the trapezoid cutting inclined plane extends towards the edge direction of the lower layer cylinder and is coplanar with the side wall of the lower layer cylinder, and the diversion trench is located at the lower bottom of the trapezoid cutting inclined plane and extends towards the center direction of the lower layer cylinder.
In this embodiment, the angle n between the trapezoid cutting bevel 403 and the bottom plane of the cemented carbide substrate 102 is 5 degrees, and the edge chamfer θ is 45 degrees. Two sides of the diversion trench 404 of the trapezoid cutting inclined plane are provided with diamond planes 405 and 406 extending towards the edge direction of the lower layer cylinder.
The side faces 407, 408 of the trapezoid cutting inclined plane are respectively located at two outer sides of the trapezoid cutting inclined plane, the side walls 409, 410 of the trapezoid cutting inclined plane are adjacent planes of the side faces 407, 408 of the trapezoid cutting inclined plane, and the side walls 409, 410 of the trapezoid cutting inclined plane are planes or arc surfaces.
In some alternative embodiments: referring to fig. 1a, 1b, and 1c, a fourth embodiment of the present application provides a high cutting efficiency diamond compact, in which each trapezoid cutting bevel of the high cutting efficiency diamond compact has a different angle with respect to the bottom surface of the cemented carbide substrate 102.
The angle between the trapezoid cutting inclined plane 103 and the bottom surface of the cemented carbide substrate 102 is 10 degrees, the angle between the trapezoid cutting inclined plane 104 and the bottom surface of the cemented carbide substrate 102 is 15 degrees, and the angle between the trapezoid cutting inclined plane 105 and the bottom surface of the cemented carbide substrate 102 is 20 degrees.
The periphery of the hard alloy substrate 102 is provided with a circumferential positioning mark, and the bonding surface between the hard alloy substrate 102 and the diamond composite layer 101 is a plane, a concave-convex surface, a linear groove surface or an annular groove surface. The diamond composite layer 101 and the hard alloy substrate 102 are sintered under the conditions of ultrahigh pressure and high temperature, and then the end face of the diamond composite layer 101 is processed into a required shape.
A second aspect of an embodiment of the present application provides a drill bit comprising a high cutting efficiency diamond compact according to any one of the embodiments described above.
Principle of operation
The embodiment of the application provides a high cutting efficiency diamond compact and a drill, because the high cutting efficiency diamond compact is provided with a cylindrical hard alloy matrix 102 and a diamond composite layer 102, the diamond composite layer 102 is arranged at one end of the hard alloy matrix 101, and the two are connected into a whole; the diamond composite layer 102 is of an upper and lower layered structure, the bottom is a lower cylinder with a set thickness, the top is provided with at least one trapezoid cutting inclined plane protruding upwards, and the trapezoid cutting inclined plane is provided with a diversion trench.
Therefore, the trapezoid cutting inclined plane of the high cutting efficiency diamond compact has small contact area, large rock breaking stress and can more effectively eat stratum relative to a circular plane structure. The diversion trench of the trapezoid cutting inclined plane can enable the diamond compact to have a good cooling effect, and the service life of the diamond compact is prolonged. The trapezoid cutting inclined plane has a certain angle, so that the impact resistance of the diamond compact can be improved, and the aggressiveness and the impact resistance of the diamond compact are balanced.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A high cutting efficiency diamond compact, comprising: the diamond composite layer is arranged at one end of the hard alloy matrix and is connected with the hard alloy matrix into a whole;
the diamond composite layer is of an upper-lower layered structure, the bottom of the diamond composite layer is a lower layer cylinder with a set thickness, the top of the diamond composite layer is provided with at least one trapezoid cutting inclined plane protruding upwards, and the trapezoid cutting inclined plane is provided with a diversion trench.
2. A high cutting efficiency diamond compact as set forth in claim 1, wherein:
the projection of the trapezoid cutting inclined plane on the lower layer cylinder is of an isosceles trapezoid structure, the upper bottom of the trapezoid cutting inclined plane extends towards the edge direction of the lower layer cylinder and is coplanar with the side wall of the lower layer cylinder, and the diversion trench is located at the lower bottom of the trapezoid cutting inclined plane and extends towards the center direction of the lower layer cylinder.
3. A high cutting efficiency diamond compact as set forth in claim 1 or 2, wherein:
the number of the trapezoid cutting inclined planes is 2-9, and 2-9 trapezoid cutting inclined planes are uniformly distributed on the circumference of the lower layer cylinder.
4. A high cutting efficiency diamond compact as set forth in claim 3, wherein:
the diversion trenches of the trapezoid cutting inclined planes are intersected and communicated at the center of the lower layer cylinder, and the diversion trenches are of concave cambered surface structures with deep centers and shallow edges.
5. A high cutting efficiency diamond compact as set forth in claim 3, wherein:
the two adjacent trapezoid cutting inclined planes are connected through a diamond plane, and the top of the diamond plane is flush with the top of the trapezoid cutting inclined plane;
the side wall of the trapezoid cutting inclined plane is a plane or an arc surface, and the side wall of the trapezoid cutting inclined plane extends downwards in an inclined mode towards the direction of the lower layer cylinder.
6. A high cutting efficiency diamond compact as set forth in claim 1 or 2, wherein:
at least one trapezoid cutting inclined plane is parallel to or forms a set angle with the bottom surface of the hard alloy matrix.
7. A high cutting efficiency diamond compact as set forth in claim 6, wherein:
the angle between the trapezoid cutting inclined plane and the bottom surface of the hard alloy substrate is 1-25 degrees, and the height of the trapezoid cutting inclined plane is gradually increased towards the center direction of the hard alloy substrate.
8. A high cutting efficiency diamond compact as set forth in claim 6, wherein:
the angles of the trapezoid cutting inclined planes and the bottom surface of the hard alloy substrate are the same or different.
9. A high cutting efficiency diamond compact as set forth in claim 1, wherein:
the periphery of the hard alloy matrix is provided with a circumferential positioning mark, and the bonding surface between the hard alloy matrix and the diamond composite layer is a plane, a concave-convex surface, a linear groove surface or an annular groove surface.
10. A drill bit comprising a high cutting efficiency diamond compact according to any one of claims 1 to 9.
CN202320341730.2U 2023-02-07 2023-02-28 High cutting efficiency diamond compact and drill bit Active CN219138982U (en)

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CN2023100754169 2023-02-07
CN202310075416 2023-02-07

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