CN103437713B - A kind of self-sharpening ring tooth diamond-impregnated bit - Google Patents
A kind of self-sharpening ring tooth diamond-impregnated bit Download PDFInfo
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- CN103437713B CN103437713B CN201310343287.3A CN201310343287A CN103437713B CN 103437713 B CN103437713 B CN 103437713B CN 201310343287 A CN201310343287 A CN 201310343287A CN 103437713 B CN103437713 B CN 103437713B
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Abstract
The invention provides and a kind of there is higher rate of penetration, self-sharpening ring tooth diamond-impregnated bit that bit life is high, solve the defect that diamond bit rate of penetration in existing hard-rock boring is not high and the life-span is on the low side.This drill bit at least comprises bit body cylindrically, the top of bit body is inlaid with the cutting blocks of 2-16 block arc along the circumferential direction, the height of described cutting blocks is all identical, the cross section of cutting blocks is fan-shaped, the end face of cutting blocks is working lip, described working lip is equipped with curved 3-10 bar cutting teeth, the longitudinal section being provided with the cutting blocks of cutting teeth is pectination, the top margin into cutting teeth is sharply located at top on longitudinal section, cutting blocks take up an official post a cutting teeth top margin place circumference all with the circumferential concentric at cutting blocks place, the drift angle of cutting teeth is 50-120 °, and the drift angle being positioned at the cutting teeth on same different cutting blocks is circumferentially all not identical.<!--1-->
Description
Technical field
The invention provides a kind of diamond bit creeping into use in medium hardness rock extremely very solid rock, particularly relate to a kind of self-sharpening ring tooth diamond-impregnated bit, belong to geological prospecting borehole field.
Background technology
At present in geological prospecting medium hardness and hard-rock boring, bit type selection generally all adopts diamond-impregnated bit.Because rock stratum belongs to medium hardness and solid rock, drillability higher grade, shows diamond and not easily go out sword, rate of penetration is low and bit life is low feature in diamond bit course of work at the bottom of hole.Therefore in order to improve rate of penetration and bit life, the labial surface structure of conventional bit can be changed, proposing a kind of new labial surface structure, to improve the effect of drill bit fractured rock at the bottom of hole.
The existing multiple diamond bit with pectination cutting teeth working lip structure at present, but its shortcoming is the rapid wearing of this pectination cutting teeth tooth top, and working lip changes, and forms plane.Because add the contact area at the bottom of diamond and hole, require to use large axle to carry fractured rock.The increase that axle carries can cause the increase of drill bit and drilling tool dynamic load, causes producing heel and toe wear.Therefore, the life-span of this diamond bit is not high, and rate of penetration is low.
Summary of the invention
The invention provides and a kind of there is higher rate of penetration, self-sharpening ring tooth diamond-impregnated bit that bit life is high, solve the defect that diamond bit rate of penetration in existing hard-rock boring is not high and the life-span is on the low side.
Realizing the technical scheme that above-mentioned purpose of the present invention adopts is:
A kind of self-sharpening ring tooth diamond-impregnated bit, at least comprise bit body cylindrically, the top of bit body is inlaid with the cutting blocks of 2-16 block arc along the circumferential direction, the height of described cutting blocks is all identical, the cross section of cutting blocks is fan-shaped, the end face of cutting blocks is working lip, described working lip is equipped with curved 3-10 bar cutting teeth, the longitudinal section being provided with the cutting blocks of cutting teeth is pectination, the top margin into cutting teeth is sharply located at top on longitudinal section, cutting blocks take up an official post a cutting teeth top margin place circumference all with the circumferential concentric at cutting blocks place, the drift angle of cutting teeth is 50-120 °, and the drift angle being positioned at the cutting teeth on same different cutting blocks is circumferentially all not identical.
Described cutting blocks is provided with eight, and the arc length of eight cutting blocks is all identical.
Described cutting blocks is equipped with 3 cutting teeths, be respectively interior cutting teeth, middle cutting teeth and outer cutting teeth, wherein the top margin of eight interior cutting teeths is all positioned at circumferentially same, and the top margin of eight middle cutting teeths is all positioned at circumferentially same, and the top margin of eight outer cutting teeths is all positioned at circumferentially same.
The carcass structure of above-mentioned drill bit adopts hot-press method sintering to form by graphite jig at present.The pressure sintered with this graphite jig is inadequate, and the diamond in carcass can not be made effectively to be plated, and the gap of generation makes the abrasion resistance of drill bit and intensity reduce, and have impact on the raising of its scope of application, drilling efficiency and bit life index.
Therefore a kind of method preparing above-mentioned bit matrix is additionally provided in the present invention, specific as follows: WC-Co cold moudling in metal stamping and pressing together with diamond powder, pressure is 700kg/cm
2above, adamantine plating is strengthened like this.After having colded pressing, drill bit carries out impregnation sintering at protective atmosphere (as vacuum or inert gas) middle binding metal (such as copper powder), can complete the preparation of bit matrix.Adopt the method can get rid of in drill bit the situation having hole to exist, thus add the scope of application of manufactured diamond bit, also improve the scuff resistance of drill bit.
Self-sharpening ring tooth diamond-impregnated bit provided by the present invention, because the drift angle being positioned at the cutting teeth on same different cutting blocks is circumferentially all not identical, the cutting teeth of such cutting blocks is in drilling process, according to the pivotal order of cutting, the differential seat angle of the addendum angle on every cutting blocks is utilized to carry out broken hole bed rock stone, two sides of cutting teeth and rock contact, fractured rock, at the bottom of broken hole, the angle of the cutting teeth be positioned on a concentric circles is produced from sharp.Meanwhile, the top of the cutting teeth on different cutting blocks is all positioned in corresponding concentric circumferences, therefore improves the abrasion resistance on same circumference the line of cut, thus maintain bit operation labial surface give shaped, until carcass polishing.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of self-sharpening ring tooth diamond-impregnated bit provided by the invention;
Fig. 2 is the longitudinal section sectional view of each cutting blocks.
In figure: 1-bit body, 2-cutting blocks, 3-cutting teeth.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed specific description is done to the present invention, but protection scope of the present invention is not limited to following examples.
The overall structure of self-sharpening ring tooth diamond-impregnated bit provided by the present invention as shown in Figure 1, at least comprise bit body 1 cylindrically, the top of bit body 1 is inlaid with the cutting blocks 2 of 2-16 block arc along the circumferential direction, different according to the diameter of bit body 1, the quantity of the cutting blocks 2 be provided with is also different, is provided with eight pieces of cutting blocks 2 in the present embodiment.The height of described cutting blocks 2 is all identical with arc length, and the cross section of cutting blocks 2 is fan-shaped, and the end face of cutting blocks 2 is working lip.
Working lip is equipped with curved 3-10 bar cutting teeth 3, in the present embodiment, cutting blocks 2 is equipped with 3 cutting teeths 3, be respectively interior cutting teeth, middle cutting teeth and outer cutting teeth, the longitudinal section being provided with the cutting blocks 2 of cutting teeth 3 is pectination, as shown in Figure 2, can learn by Fig. 2, the top margin into cutting teeth is sharply located at top on longitudinal section, described cutting blocks take up an official post a cutting teeth top margin place circumference all with the circumferential concentric at cutting blocks place, and, wherein the top margin of eight interior cutting teeths is all positioned at circumferentially same, article eight, the top margin of middle cutting teeth is all positioned at circumferentially same, article eight, the top margin of outer cutting teeth is all positioned at circumferentially same.
As shown in Figure 2, the drift angle of cutting teeth is 50-120 °, and the drift angle being positioned at the cutting teeth on same different cutting blocks is circumferentially all not identical, as the drift angle of cutting teeth is respectively on eight pieces of cutting blocks in the present embodiment: 30 °+25 °, 40 °+15 °, 30 °+30 °, 40 °+25 °, 30 °+35 °, 40 °+25 °, 30 °+40 °, 40 °+30 °.So, when bit operation, the top wedging rock of cutting teeth, at the bottom of broken hole.The top of cutting teeth, with its both sides fractured rock, forms new tooth top after its both sides are worn.New tooth top with two side fractured rock, forms new tooth top again, and circulation addendum angle is according to this from sharp, and the shape of labial surface is constant all the time, makes drill bit remain sharp state, until carcass polishing.
Therefore, drill bit rate of penetration provided by the present invention is stablized, and bit life improves, and drilling project can obtain very high technical-economic index.
Meanwhile, use this drill bit, under the formation geology condition of complexity, creep in the stratum of medium hardness to unusual solid rock alternating layers, high and stable rate of penetration can be obtained, longer bit life, and the technical-economic index greatly improving drilling project.
Claims (1)
1. a self-sharpening ring tooth diamond-impregnated bit, it is characterized in that: at least comprise bit body cylindrically, the top of bit body is inlaid with the cutting blocks of eight pieces of arcs along the circumferential direction, and the arc length of eight cutting blocks is all identical, the height of described cutting blocks is all identical, the cross section of cutting blocks is fan-shaped, the end face of cutting blocks is working lip, described working lip is equipped with three curved cutting teeths, be respectively interior cutting teeth, middle cutting teeth and outer cutting teeth, the longitudinal section being provided with the cutting blocks of cutting teeth is pectination, the top margin into cutting teeth is sharply located at top on longitudinal section, cutting blocks take up an official post a cutting teeth top margin place circumference all with the circumferential concentric at cutting blocks place, wherein the top margin of eight interior cutting teeths is all positioned at circumferentially same, article eight, the top margin of middle cutting teeth is all positioned at circumferentially same, article eight, the top margin of outer cutting teeth is all positioned at circumferentially same, the drift angle of cutting teeth is 50-120 °, and the drift angle being positioned at the cutting teeth on same different cutting blocks is circumferentially all not identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310343287.3A CN103437713B (en) | 2013-08-07 | 2013-08-07 | A kind of self-sharpening ring tooth diamond-impregnated bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310343287.3A CN103437713B (en) | 2013-08-07 | 2013-08-07 | A kind of self-sharpening ring tooth diamond-impregnated bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103437713A CN103437713A (en) | 2013-12-11 |
| CN103437713B true CN103437713B (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310343287.3A Active CN103437713B (en) | 2013-08-07 | 2013-08-07 | A kind of self-sharpening ring tooth diamond-impregnated bit |
Country Status (1)
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| CN (1) | CN103437713B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742078B (en) * | 2014-01-08 | 2016-08-24 | 无锡钻探工具厂有限公司 | A kind of pectination secter pat diamond-impregnated bit |
| CN113530455A (en) * | 2021-08-31 | 2021-10-22 | 中国地质大学（武汉） | Diamond bit combining concentric circular teeth and spiral teeth |
| CN113622827B (en) * | 2021-08-31 | 2022-05-17 | 中国地质大学（武汉） | Diamond bit for drilling into fractured hard rock stratum |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3537538A (en) * | 1969-05-21 | 1970-11-03 | Christensen Diamond Prod Co | Impregnated diamond bit |
| CN102272407A (en) * | 2008-08-15 | 2011-12-07 | 山特维克知识产权股份有限公司 | Core drill bit |
| CN102472082A (en) * | 2009-08-14 | 2012-05-23 | 长年Tm公司 | Diamond impregnated bit with aggressive face profile |
| CN102782243A (en) * | 2009-12-15 | 2012-11-14 | 长年Tm公司 | Drill bits with axially-tapered waterways |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8662208B2 (en) * | 2010-06-17 | 2014-03-04 | American National Carbide Co. | Downhole cutting tool, cutting elements and method |
-
2013
- 2013-08-07 CN CN201310343287.3A patent/CN103437713B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3537538A (en) * | 1969-05-21 | 1970-11-03 | Christensen Diamond Prod Co | Impregnated diamond bit |
| CN102272407A (en) * | 2008-08-15 | 2011-12-07 | 山特维克知识产权股份有限公司 | Core drill bit |
| CN102472082A (en) * | 2009-08-14 | 2012-05-23 | 长年Tm公司 | Diamond impregnated bit with aggressive face profile |
| CN102782243A (en) * | 2009-12-15 | 2012-11-14 | 长年Tm公司 | Drill bits with axially-tapered waterways |
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| Publication number | Publication date |
|---|---|
| CN103437713A (en) | 2013-12-11 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20131211 Assignee: WUHAN WANBANG LASER DIAMOND TOOLS CO., LTD. Assignor: China University of Geosciences (Wuhan) Contract record no.: 2019420000018 Denomination of invention: Self-sharpening type ring tooth impregnated diamond drill bit Granted publication date: 20151104 License type: Exclusive License Record date: 20190401 |
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| EE01 | Entry into force of recordation of patent licensing contract |