CN202100201U - Conical toothed diamond compact - Google Patents
Conical toothed diamond compact Download PDFInfo
- Publication number
- CN202100201U CN202100201U CN201120180532XU CN201120180532U CN202100201U CN 202100201 U CN202100201 U CN 202100201U CN 201120180532X U CN201120180532X U CN 201120180532XU CN 201120180532 U CN201120180532 U CN 201120180532U CN 202100201 U CN202100201 U CN 202100201U
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- CN
- China
- Prior art keywords
- cone
- diamond compact
- cylinder
- drill bit
- cone body
- Prior art date
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- Expired - Lifetime
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Abstract
The utility model discloses a conical toothed diamond compact, which comprises a surface diamond compact layer and a bottom hard alloy substrate. The diamond compact layer comprises an upper cone body and a lower cylinder body 2, wherein the diameter of the bottom surface of the cone body is identical to the diameter of the cylinder body, the upper surface of the cylinder body is combined with the bottom surface of the cone body, and the lower surface of the cylinder body is fixedly connected with the hard alloy substrate. Since the front end of the diamond compact layer is additionally provided with the cone body and the front end of the cone body is provided with a sharp angle and an inclined side face, small stones can be broken more easily by a drill bit due to the sharp angle of the cone body during drilling of the drill bit. Particularly when a rock layer with clearances is drilled, the inclined side face of the cone body can automatically slide out of the rock clearances, the drill bit is then lifted, the clamping of the drill bit into the clearances of the rock layer can be effectively avoided, and the clamping of the drill bit can be eliminated.
Description
Technical field
The present invention relates to the superhard material field, relate in particular to a kind of conical tooth diamond compact.
Background technology
Diamond compact mainly is composited through HTHP by the polycrystalline diamond composite bed on top layer and the hard alloy substrate of bottom.The diamond composite bed is as the cutwork surface of diamond compact, and its structure plays decisive role to the performance of diamond compact.Yet traditional diamond composite bed is generally the disk shape.Because the upper surface of this disk shape diamond composite bed is the plane, the upper surface is vertical with the tangent plane mutually of justifying the side, so the front end of diamond composite bed does not have chamfering and is difficult to pierce in the gapped rock stratum; Secondly, the diamond compact of this structure the phenomenon of bit freezing occurs easily when impacting gapped rock stratum.
The utility model content
The utility model technical problem to be solved provides a kind of conical tooth diamond compact, and it pierces or lift from gapped rock stratum more easily, effectively avoids the generation of bit freezing phenomenon.
For addressing the above problem; The utility model relates to a kind of conical tooth diamond compact; Comprise the diamond composite bed on top layer and the hard alloy substrate of bottom, said diamond composite bed is made up of superposed cone and cylinder 2 parts that are positioned at the bottom, wherein the bottom surface diameter of cone and cylindrical equal diameters; Cylindrical upper surface combines with the cone bottom surface, and cylindrical soffit is connected with hard alloy substrate mutually.
The top of the said cone of such scheme and/or cone and cylindrical joint all seamlessly transit through fillet.
The said cylindrical soffit of such scheme is non-smooth matsurface.
The ratio of the height of the said cone of such scheme and cylindrical height is between 1: 5～3: 1.
The tapering of the said cone of such scheme is 120 °≤α≤150 °.
The tapering of the said cone of such scheme is 120 °.
Compared with prior art, the utility model is through setting up a cone, because the cone front end has the side of a wedge angle and inclination at the front end of diamond layer; Therefore not only in the process that drill bit pierces, the wedge angle of cone makes that drill bit can more easily broken finger stone, particularly when creeping into the rock stratum that has the gap; The inclined side of cone can skid off rock gap automatically; On lift drill bit, thereby effectively avoid drill bit to snap in the gap, rock stratum, solve lock of tool drilling when creeping into.
Description of drawings
Fig. 1 is the structural representation of a kind of conical tooth diamond compact of the utility model.
Label is among the figure: 1, diamond composite bed; 1-1, cone; 1-2, cylinder; 2, hard alloy substrate; The tapering of α, cone; The height of h, cone; H, cylindrical height.
The specific embodiment
A kind of conical tooth diamond compact of the utility model is as shown in Figure 1, comprises the diamond composite bed 1 on top layer and the hard alloy substrate 2 of bottom.Said diamond composite bed 1 is made up of with the cylinder 1-2 two parts that are positioned at the bottom superposed cone 1-1; The equal diameters of the bottom surface diameter of cone 1-1 and cylinder 1-2 wherein; The upper surface of cylinder 1-2 combines with cone 1-1 bottom surface, and the soffit of cylinder 1-2 is connected with hard alloy substrate 2 mutually.The cone 1-1 of composition diamond composite bed 1 and cylinder 1-2 become a complete whole through high temperature sintering in process of production, do not have tangible gap between the two.Because the front end of the diamond layer of this structure has a transition circle cone 1-1 who increases gradually from front to back, thereby not only can better pierce in the rock stratum, improve drilling efficiency; And can avoid the bit freezing phenomenon generation, be that drilling rod can be lifted automatically.
The joint of the top of above-mentioned cone 1-1 and/or cone 1-1 and cylinder 1-2 can directly join; But in the drill bit going down process; Its stress concentrates on above-mentioned joint; And cause the damage of diamond compact, in the utility model preferred embodiment, the joint of the top of said cone 1-1 and cone 1-1 and cylinder 1-2 all seamlessly transits through fillet.In the utility model, the tapering α of said cone is 120 °≤α≤150 °.And in the utility model preferred embodiment, the tapering α of said cone is 120 °.
In order to take into account self intensity and drilling efficiency of diamond compact, form the two-part thickness ratio of diamond composite bed 1, promptly the ratio of the height h of cone and cylindrical height H should be between 1: 5～3: 1.In the utility model preferred embodiment, the height h of cone is 1: 1 with the ratio of cylindrical height H, i.e. height such as cone 1-1 and cylinder 1-2.
The bonding surface of above-mentioned diamond composite bed 1 and hard alloy substrate 2, the i.e. upper surface of the soffit of cylinder 1-2 and hard alloy substrate 2 smooth surface that can cooperatively interact for smooth plane, shape.But in order to improve the adhesion between diamond composite bed 1 and the hard alloy substrate 2; Diamond composite bed 1 is preferably non-smooth coarse plane or curved surface with the bonding surface of hard alloy substrate 2; Be that the soffit of cylinder 1-2 and the upper surface of hard alloy substrate 2 are provided with chimeric pimple or dolly dimple each other; These pimples or dolly dimple can effectively disperse the stress on the bonding surface of diamond composite bed 1 and hard alloy substrate 2, thereby can effectively avoid the disengaging of diamond composite bed 1 and hard alloy substrate 2.
Claims (6)
1. conical tooth diamond compact; Comprise the diamond composite bed (1) on top layer and the hard alloy substrate (2) of bottom; It is characterized in that: said diamond composite bed (1) is made up of superposed cone (1-1) and cylinder (1-2) 2 parts that are positioned at the bottom; The equal diameters of the bottom surface diameter of cone (1-1) and cylinder (1-2) wherein, the upper surface of cylinder (1-2) combines with cone (1-1) bottom surface, and the soffit of cylinder (1-2) is connected with hard alloy substrate (2) mutually.
2. conical tooth diamond compact according to claim 1 is characterized in that: the top of said cone (1-1) and/or cone (1-1) all seamlessly transit through fillet with the joint of cylinder (1-2).
3. conical tooth diamond compact according to claim 1 is characterized in that: the soffit of said cylinder (1-2) is non-smooth matsurface.
4. conical tooth diamond compact according to claim 1 is characterized in that: the ratio of height of said cone (h) and cylindrical height (H) is between 1: 5～3: 1.
5. conical tooth diamond compact according to claim 1 is characterized in that: the tapering of said cone (α) is 120 °≤α≤150 °.
6. conical tooth diamond compact according to claim 5 is characterized in that: the tapering of said cone (α) is 120 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120180532XU CN202100201U (en) | 2011-05-31 | 2011-05-31 | Conical toothed diamond compact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120180532XU CN202100201U (en) | 2011-05-31 | 2011-05-31 | Conical toothed diamond compact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202100201U true CN202100201U (en) | 2012-01-04 |
Family
ID=45386217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120180532XU Expired - Lifetime CN202100201U (en) | 2011-05-31 | 2011-05-31 | Conical toothed diamond compact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202100201U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064926A (en) * | 2015-07-29 | 2015-11-18 | 桂林星钻超硬材料有限公司 | Special PDC for high-speed drilling anchor rod drill bit |
| CN114151017A (en) * | 2021-11-23 | 2022-03-08 | 中海石油(中国)有限公司 | Bionic eccentric polycrystalline diamond compact |
-
2011
- 2011-05-31 CN CN201120180532XU patent/CN202100201U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064926A (en) * | 2015-07-29 | 2015-11-18 | 桂林星钻超硬材料有限公司 | Special PDC for high-speed drilling anchor rod drill bit |
| CN105064926B (en) * | 2015-07-29 | 2017-05-17 | 桂林星钻超硬材料有限公司 | Special PDC for high-speed drilling anchor rod drill bit |
| CN114151017A (en) * | 2021-11-23 | 2022-03-08 | 中海石油(中国)有限公司 | Bionic eccentric polycrystalline diamond compact |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120104 |