CN216841452U

CN216841452U - Multi-cutting-edge diamond compact

Info

Publication number: CN216841452U
Application number: CN202220451983.0U
Authority: CN
Inventors: 刘强; 涂关富
Original assignee: Kingdream PLC; Sinopec Oilfield Equipment Corp
Current assignee: Sinopec Oilfield Equipment Corp
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-06-28
Anticipated expiration: 2032-03-03

Abstract

The utility model relates to a many cutting edges diamond compact piece, including cylindricality carbide base member and diamond composite bed, the diamond composite bed set up the one end at the carbide base member, both link together an organic whole, its characterized in that diamond composite bed terminal surface edge be provided with 2 kinds or the different chamfers more than 2 kinds to form different cutting edges. The utility model discloses a set up different chamfers at diamond composite bed terminal surface edge, form the many cutting edges of diamond compact terminal surface circumference, realize that the different edges of same compound piece have different attack ability and shock resistance. Because the edge chamfer of the end face of the diamond composite layer forms cutting edges with various different properties of the composite sheet, the same diamond composite sheet can meet the drilling requirements of different stratums and is reasonably arranged on the diamond drill bit, and the diamond drill bit can meet the drilling requirements of complex stratums.

Description

Multi-cutting-edge diamond compact

Technical Field

The utility model relates to a compound piece of many cutting edges diamond for diamond bit's cutting element belongs to oil drilling instrument technical field.

Background

Diamond drills were widely used in oil and gas drilling projects starting in the 80 s of the last century. Diamond drill bits are primarily comprised of a bit body and cutting elements, and diamond drill bits are classified into three categories according to 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 formations, and through continuous technical progress, the application range of the PDC drill bit is wider and wider, and the PDC drill bit has better economic value. TSP bits are mainly used for drilling medium to extremely hard formations. At present, deep well operation in petroleum and natural gas drilling engineering is gradually increased, and drilling of encountered strata is more and more complex.

The diamond compact comprises cylindricality carbide base member and diamond composite bed, and diamond composite bed terminal surface edge chamfer forms the cutting edge of compound piece, and diamond bit is at the drilling in-process, and the stratum that meets is bored in different regions is different, and the aggressive of required compound piece is different with shock resistance, and the compound piece cutting edge chamfer that has now all is single chamfer structure, is difficult to adapt to the drilling demand in complicated stratum.

Disclosure of Invention

The utility model aims to solve the technical problem that not enough to above-mentioned prior art exists provides a compound piece of many cutting edges diamond, makes its drilling demand that can adapt to different stratums.

The utility model discloses a solve the technical scheme that the problem that the aforesaid provided adopted and be: the diamond composite layer is arranged at one end of the hard alloy substrate and is connected with the hard alloy substrate into a whole, and the diamond composite layer is characterized in that 2 or more than 2 different chamfers are arranged on the edge of the end face of the diamond composite layer to form different cutting edges.

According to the technical scheme, the edge of the end face of the diamond composite layer is provided with 2-4 different chamfers so as to form 2-4 different cutting edges.

According to the technical scheme, the chamfer slope surface is one or more of an inclined plane chamfer, a bending surface chamfer and a curved surface chamfer.

According to the technical scheme, the included angle between the slope surface of the inclined chamfer and the end plane of the diamond composite layer is 20-70 degrees, and the end plane of the diamond composite layer is perpendicular to the axis of the cylindrical hard alloy substrate.

According to the technical scheme, the curved surface chamfer is an arc chamfer with different curvature radiuses.

According to the technical scheme, the unilateral radial depth of the chamfer is 0.2-5 mm.

According to the technical scheme, the different chamfers are arranged along the circumferential direction and are connected end to end, and each chamfer corresponds to one central angle.

According to the technical scheme, the end face of the diamond composite layer is a plane, an inner concave surface or an outer convex surface.

According to the technical scheme, the radial section of the diamond composite layer is the same as that of the hard alloy substrate and is circular, elliptic or regular polygonal.

According to the technical scheme, the bonding surface between the hard alloy matrix and the diamond composite layer is a plane, a concave-convex block surface or a groove surface.

According to the technical scheme, the diamond composite layer is a polycrystalline diamond composite layer or a thermal-stability polycrystalline diamond composite layer.

The beneficial effects of the utility model reside in that: 1. different chamfers are arranged on the edge of the end face of the diamond composite layer to form multiple circumferential cutting edges of the end face of the diamond composite sheet, so that different edges of the same composite sheet have different attack capabilities and impact resistance capabilities. 2. Because the edge chamfer of the end face of the diamond composite layer forms cutting edges with various different properties of the composite sheet, the same diamond composite sheet can meet the drilling requirements of different stratums and is reasonably arranged on the diamond drill bit, and the diamond drill bit can meet the drilling requirements of complex stratums.

Drawings

Fig. 1 and fig. 2 are a top view and a front view, respectively, of a first embodiment of the present invention.

Fig. 3 and 4 are a top view and a front view, respectively, of a second embodiment of the present invention.

Fig. 5 and 6 are a top view and a front view, respectively, of a third embodiment of the present invention.

Fig. 7 and 8 are a top view and a front view, respectively, of a fourth embodiment of the present invention.

Fig. 9 and 10 are a top view and a front view, respectively, of a fifth embodiment of the present invention.

Fig. 11 to 12 are a plan view and a rotational sectional view a-a of sixth embodiment of the present invention, respectively.

Fig. 13 to 14 are a top view and a-a rotation sectional view of a seventh embodiment of the present invention, respectively.

Detailed Description

The present invention will be further illustrated with reference to the following examples.

In one embodiment, as shown in fig. 1 to 2, the diamond composite layer comprises a diamond composite layer 101 and a hard alloy substrate 102, an end face of the diamond composite layer is a plane, the diamond composite layer is a polycrystalline diamond composite layer, the diamond composite layer and the hard alloy substrate are connected into a whole through ultra-high temperature and high pressure sintering, the edge of the end face of the diamond composite layer is provided with 4

chamfers

103, 104, 105, and 106, central angles corresponding to each chamfer respectively account for 90 degrees (l/2), the 4 chamfers have two different structures, wherein 2 chamfers 103 and 105 have the same structure and are 45-degree chamfer angles with single-side radial depth of 0.4mm, the same structure chamfers are symmetrically distributed at intervals of 90 degrees, the other 2

chamfers

104 and 106 have the same structure and are 45-degree chamfer angles with single-side radial depth of 0.3mm, the chamfers are distributed along the circumferential direction and are connected end to end, and the chamfers are in smooth transition. Forming different cutting edges. The diamond compact of this example radial cross-section is circular, and the diameter is 15.8mm, and the cylinder height is 13.2 mm.

The second embodiment is as shown in fig. 3 to 4, and is different from the first embodiment in that there are 4 chamfers with three structures, wherein 2

chamfers

204 and 206 have the same structure and are 45 ° chamfer angles with single side radial depth of 0.4mm, the chamfers with the same structure are symmetrically distributed at intervals of 90 °, another chamfer 203 is a 45 ° chamfer angle with single side radial depth of 0.3mm, and the chamfer 205 at the front left position is a 45 ° chamfer angle with single side radial depth of 0.5 mm. The other structure is the same as the first embodiment.

In the third embodiment, as shown in fig. 5 to 6, 3 chamfers are provided, each central angle corresponding to each chamfer occupies 120 degrees and is uniformly distributed along the circumferential direction, the 3 chamfers have three structures, one chamfer 303 is a 45-degree inclined chamfer with a unilateral radial depth of 0.5mm, the other chamfer 304 is a 45-degree inclined chamfer with a unilateral radial depth of 0.3mm, and the third chamfer 305 is a 45-degree inclined chamfer with a unilateral radial depth of 0.4 mm. 3 chamfers are arranged along the circumference and are connected end to end. The other structure is the same as the first embodiment.

The fourth embodiment is as shown in fig. 7 to 8, and is different from the first embodiment in that 2 of the

chamfers

403 and 405 are identical in structure and are single-sided 45 ° bevel chamfers with a radial depth of 0.5mm, and the other 2

chamfers

404 and 406 are identical in structure and are circular arc chamfers with a curvature radius of 0.5 mm. The other structure is the same as the first embodiment.

In the fifth embodiment, as shown in fig. 9 to 10, the difference from the first embodiment is that 2

corresponding chamfers

503 and 505 are identical in structure and are 45 ° bevel chamfers with a single-side radial depth of 0.3mm, 2 corresponding chamfers are identical in central angle and are each α ═ 52 °, and the other 2

corresponding chamfers

504 and 506 are identical in structure and are 45 ° bevel chamfers with a single-side radial depth of 0.5mm, and 2 corresponding chamfers are identical in central angle and are each β ═ 128 °.

Sixth embodiment is as shown in fig. 11 to 12, which is different from fifth embodiment in that 2 of the

chamfers

603 and 605 distributed correspondingly have the same structure, and are bevel chamfers with a single-side radial depth of 2.4mm, the included angle between the slope surface of the bevel chamfer and the end plane of the diamond composite layer is γ ═ 22.5 °, the central angles corresponding to 2 chamfers are the same, δ 1 ═ δ 3 ═ 52 °, the other 2 of the

chamfers

604 and 606 distributed correspondingly have the same structure, θ ═ 45 ° bevel chamfers with a single-side radial depth of 1mm, the central angles corresponding to 2 chamfers are the same, and δ 2 ═ δ 4 ═ 128 °. The other structure is the same as that of the fifth embodiment.

In the seventh embodiment, as shown in fig. 13 to 14, the difference from the sixth embodiment is that 2

corresponding chamfers

703 and 705 are the same in structure and are formed by combining a D2 inner chamfer with a single-side radial depth of 2.3mm and a D3 outer chamfer with a single-side radial depth of 0.3mm, an included angle between a slope surface of the inner chamfer and an end plane of the diamond composite layer is D2-20 °, an included angle between a slope surface of the outer chamfer and an end plane of the diamond composite layer is D3-45 °, corresponding central angles of 2 chamfers are the same, J1-J3-52 °, and

corresponding chamfers

704 and 706 are the same in structure, D1-45 ° chamfer with a single-side radial depth of 1mm are the same, corresponding central angles of 2 chamfers are the same, and J2-J4-128 °. The other structure is the same as embodiment six.

Claims

1. The utility model provides a many cutting edges diamond compact piece, includes cylindricality carbide base member and diamond composite bed, the diamond composite bed set up the one end at the carbide base member, both link together integratively, its characterized in that diamond composite bed terminal surface edge be provided with 2 kinds or the chamfer of more than 2 kinds differences to form different cutting edges.

2. The multi-tipped diamond compact of claim 1, wherein the edge of the end face of the diamond composite layer has 2 to 4 different chamfers to form 2 to 4 different cutting edges.

3. The multi-cutting-edge diamond compact of claim 1 or 2, wherein the chamfer slope is one or more of a bevel chamfer, a bending face chamfer and a curved surface chamfer.

4. The multi-cutting-edge diamond compact of claim 3, wherein the included angle between the slope of the bevel chamfer and the end plane of the diamond composite layer is 20-70 degrees, and the end plane of the diamond composite layer is perpendicular to the axis of the cylindrical hard alloy substrate.

5. The multi-tipped diamond compact of claim 3, wherein the curved chamfer is a radiused chamfer having a different radius of curvature.

6. The multi-tipped diamond compact of claim 1 or 2, wherein the single-sided radial depth of the chamfer is 0.2 to 5 mm.

7. The multi-tipped diamond compact of claim 1 or 2, wherein the different chamfers are circumferentially arranged and end-to-end, each chamfer corresponding to a central angle.

8. A multi-tipped diamond compact according to claim 1 or 2, wherein the end face of the diamond composite layer is a flat face, an inner concave face or an outer convex face.

9. A multi-tipped diamond compact according to claim 1 or 2, wherein the radial cross-section of the diamond composite layer is the same as the radial cross-section of the cemented carbide substrate and is circular, elliptical or regular polygonal.

10. The multi-tipped diamond compact of claim 1 or 2, wherein the bonding surface between the cemented carbide substrate and the diamond composite layer is a flat surface, a convex-concave surface or a grooved surface; the diamond composite layer is a polycrystalline diamond composite layer or a thermal stable polycrystalline diamond composite layer.