CN101818622A - Diamond drill bit and manufacturing method thereof - Google Patents
Diamond drill bit and manufacturing method thereof Download PDFInfo
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- CN101818622A CN101818622A CN 201010124752 CN201010124752A CN101818622A CN 101818622 A CN101818622 A CN 101818622A CN 201010124752 CN201010124752 CN 201010124752 CN 201010124752 A CN201010124752 A CN 201010124752A CN 101818622 A CN101818622 A CN 101818622A
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Abstract
The invention relates to a diamond drill bit and a manufacturing method thereof. The diamond drill bit comprises a working layer of a common diamond drill bit and a sintering body distributed on the working layer. The sintering body is a thermo-stabile polycrystal and comprises square columnar and cylindrical thermo-stabile polycrystals, wherein the square columnar thermo-stabile polycrystals are distributed and arranged on inner and external diameter parts of the working layer of the drill bit, and the cylindrical thermo-stabile polycrystals are distributed and arranged on the part of the working layer of the drill bit close to the center. The manufacturing method for the diamond drill bit comprises that the diamond drill bit is formed by hot pressing and sintering in a medium frequency furnace, wherein the temperature in the sintering process is 985 DEG C, the pressure is 18MPa, the heat preservation time is 6 minutes and the discharge temperature is 800 DEG C. The difficult problem of good drilling effect in a sandy pebble stratum and a hard-crisp-broken rock stratum is solved. The diamond drill bit has the characteristics of high hardness, strong abrasion resistance and long service life, and can be widely applied to geological exploration, petroleum drilling, engineering exploration and governance of geological disasters.
Description
Technical field
The present invention relates to a kind of diamond bit and manufacture method thereof that is used for geological prospecting, oil drilling and engineering investigation and geological hazard control.
Background technology
Begin to develop synthetic diamond core bit from China and begin, make diamond bit and mainly adopt hot-press method and electro-plating method.The diamond bit of hot-press method manufacturing is compared with electroplated diamond bit, has higher hardness and abrasion resistance, has certain compliance.But, because the diversity on stratum requires different stratum will have the drill bit of respective performances to deacclimatize, just the drilling effect that can obtain.The working lining performance and the structure that add common diamond bit are single, and the broad spectrum activity of drill bit is relatively poor.Along with geological prospecting develops to earth formation deep, the character of rock stratum becomes increasingly complex, in a boring, even one crept into round trip and do not crept into, and lithology just changes, and needs the drill bit of frequent replacing different performance, seriously affect the process of geological drilling, improved the cost of probing.And the common diamond bit of hot-press method manufacturing has higher hardness and abrasion resistance, can adapt to the needs that creep into most rock stratum.But for creeping into ovum gravel stratum and hard-crisp-rock stratum such as strong abrasiveness such as broken grade bad adaptability that but seems, rate of penetration is not high, and the life-span of drill bit is not long yet.Along with geological prospecting develops to earth formation deep, the rock stratum is more and more harder, and lithology becomes increasingly complex, the probability that strong abrasiveness rock stratum occurs is more and more higher, and nearly all metallic ore probing all can run into this class rock stratum, seriously affect the process of geological prospecting, improved the cost of probing.
Summary of the invention
Its purpose of the present invention just is a kind of diamond bit and manufacture method thereof are provided, and has the hardness height, and abrasion resistance is strong, and the characteristics of long service life suit to creep in sand-pebble layer and hard-crisp-detritus layer especially.Realize the technical solution adopted in the present invention, the working lining and the sintered body that is distributed on the working lining that comprise common diamond bit, described sintered body is the heat stability polycrystal, comprise flat column and cylindric heat stability polycrystal, the interior external diameter position of the described flat column heat stability polycrystal working lining at drill bit arranged evenly, described cylindric heat stability polycrystal is arranged evenly at the position of drill bit working lining near the center.Its manufacture method comprises that the middle frequency furnace hot pressed sintering becomes diamond bit, and sintering process is 985 ℃ of temperature, pressure 18MPa, temperature retention time 6min, 800 ℃ of tapping temperatures.
Compared with prior art the present invention has the following advantages.
Because the technical design that has adopted the heat stability polycrystal in the cutting unit of drill bit, to distribute, arrange according to certain rule, main body with diamond coenosarc composition fractured rock, thereby has a hardness height, abrasion resistance is strong, the characteristics of long service life, drilling effect is good in sand-pebble layer and hard-crisp-detritus layer.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the structural representation one of hot pressing diamond bit of the present invention;
Fig. 2 is the structural representation two of hot pressing diamond bit of the present invention.
Among the figure, 1-flat column heat stability polycrystal; The cylindric heat stability polycrystal of 2-; 3-working lining carcass; The 4-mouth of a river.
The specific embodiment
The working lining 3 and the sintered body that is distributed on the working lining that comprise common diamond bit, as shown in Figure 1, 2, described sintered body is the heat stability polycrystal, comprise flat column and cylindric heat stability polycrystal 1,2, the interior external diameter position of described flat column heat stability polycrystal 1 working lining 3 at drill bit arranged evenly, described cylindric heat stability polycrystal 2 is arranged evenly at the positions of drill bit working lining 3 near centers.
The specification of described flat column heat stability polycrystal 1 is 3 * 3 * 10mm, and the specification of cylindric heat stability polycrystal 2 is φ 2 * 8mm or φ 2.5 * 8mm.
Drill bit working lining 3 carcass materials adopt tungsten carbide, YG8, nickel, cobalt, manganese, titanium and copper alloy; Drill bit working lining 3 tyre body hardness are HRC40～45, abrasion resistance is (0.35～0.40) * 10-5ML, diamond grade is SMD30～35 in drill bit working lining 3 carcasses, adamantine concentration is 88%, and adamantine granularity and content thereof are respectively: 40/45 accounts for 30%, 45/50 accounts for 40%, 60/70 and accounts for 20%, 80/100 and account for 10%.
Its manufacture method comprises that the middle frequency furnace hot pressed sintering becomes diamond bit, and described middle frequency furnace sintering process is 985 ℃ of temperature, pressure 18MPa, temperature retention time 6min, 800 ℃ of tapping temperatures.
Embodiment
Of the present invention theing contents are as follows:
(1) a kind of thinking and method for designing that improves the drill bit abrasion resistance of employing when improving the carcass abrasion resistance, strengthened the guarantor footpath effect of drill bit working lining, realizes that drill bit turns round steadily and the balance abrasion of working lining, to reach the purpose that improves bit life.
(2) on the basis of common hot pressing diamond bit, the heat stability polycrystal is regular, distribute in an orderly manner, be arranged in the working lining of drill bit.The heat stability polycrystal had both played a part fractured rock, played a part to strengthen the abrasion resistance and the guarantor footpath effect of drill bit again, the stability and the application life of effectively having improved drill bit.
(3) abrasion resistance of raising drill bit not only adopts the carcass of high-wearing feature, often adopts the carcass of high-wearing feature to be unfavorable for that diamond goes out sword, and " skidding " appears in drill bit easily, and drilling efficiency is very low.This patent has adopted the carcass than high-wear resistance, cooperates the heat stability glomerocryst, can realize the high and good double effects of drilling effect of abrasion resistance of drill bit.
(4) employing flat column polycrystal is distributed in the interior external diameter position near drill bit, and its length is got 10mm, the interior external diameter position eccentric wear that helps improving guarantor's footpath effect of drill bit and effectively prevent drill bit.Adopt cylindric polycrystal to be distributed in the centre of drill bit working lining, help improving rate of penetration and drill bit balance abrasion.See Fig. 1.
(5) cylindric polycrystal 2 is arranged along the bit cutting circumferencial direction, finishes the fragmentation of a part of hole base ring shape rock; Glomerocryst in the same cutting unit allows overlapping 1%～2%; The polycrystal coenosarc of same cutting unit is finished the catalase at the bottom of the whole drill bit annular aperture.
(6) distribution of two kinds shown in Fig. 1,2, arrangement mode, A type structure chart 1 wherein is adapted to strong abrasive layer, for example sand-pebble layer; And Type B structure chart 2 is adapted to strong abrasive layer, for example hard-crisp-broken stratum.
The present invention is a kind of new construction hot pressing diamond bit.New construction shows as the working lining part of drill bit and is made up of common diamond working layers and heat stability polycrystal.By the polycrystal of different size, shape and quantity, the regular different parts that is distributed in the drill bit working lining can obtain different abrasion resistancies, satisfies the needs that creep into of in various degree abrasiveness rock stratum.
(1) working lining of diamond bit:
The present invention studies its design feature and the Cracking Mechanism under the drill bit effect from the physico-mechanical properties of strong abrasiveness rock, recognizes that creeping into this rocks can not adopt big the pressure of the drill, can not adopt high rotating speed.And the working lining of drill bit should be stood the wearing and tearing of rock, makes diamond to cut effectively in the rock again, could realize high rate of penetration and low wear extent like this.
By test and analysis, the working lining tyre-e/or performance of diamond bit must remain on: its hardness HRc40～HRc45 scope, its abrasion resistance is (0.35～0.40) * 10-5ML scope, can good going out the sword effect and guarantee that drill bit has good wearability be arranged guarantee fund's hard rock.The diamond bit hardness and wear resistance mainly the component content by regulating carcass than realizing with diamond parameter (granularity and concentration).
(2) the carcass composition of diamond bit of the present invention and content thereof are: tungsten carbide 38%～40%, YG815%～12%, nickel 8%～12%, cobalt 3%～5%, manganese 3%～4%, titanium 2%～3%, copper alloy 33%～35%.
(3) diamond grade is SMD30～35 in the working lining carcass of drill bit of the present invention, and adamantine concentration is 88%, and adamantine granularity and content thereof are respectively: 40/45 accounts for 30%, 45/50 accounts for 40%, 60/70 and accounts for 20%, 80/100 and account for 10%.
(4) heat stability polycrystal:
The heat stability polycrystal adopts flat column and cylindric two types, and its specification is: flat column is 3 * 3 * 10mm, and cylindric is φ 2 * 8mm and φ 2.5 * 8mm.Wear resistance ratio is the main performance of heat stability polycrystal, and its value can not be lower than 1: 5 ten thousand.The interior external diameter position that the flat column polycrystal is distributed in drill bit helps improving the guarantor footpath effect of drill bit; And cylindric polycrystal is distributed in the middle part of drill bit working lining and helps rock cutting, guarantees rate of penetration.
(5) the drill bit assembling is with hot-forming:
1. adopt high strength, high density and highly purified graphite material,, make the sintering mold of hot pressing diamond bit through machining according to designing requirement.
2. design by prescription, various metal dust weighings are placed well carry out ball mill mixing in the ball grinding cylinder; Mixing time can not be less than 12h.Add certain diamond and cementing agent in the powder that mixes, mix again.
3. with the scheme of heat stability polycrystal, be fixed on regularly in the drill bit graphite jig by design.Then, the diamantiferous carcass powder that mixes is good by the weight weighing that calculates, pour in the graphite jig; Add and protect footpath layer metal powder material, the assembling of drill-bit sintering mould is promptly finished in compacting.
4. the mould that assembles is sent in the intermediate frequency furnace, send water, starts middle frequency furnace and carries out hot pressed sintering.Under the process conditions of setting: 985 ℃ of temperature, pressure 18MPa, temperature retention time 6min.Through behind the sintering of this heat pressing process, when furnace temperature drops to 800 ℃, can release come out of the stove, finish the sintering of drill bit and make.
5. the drill bit that sinters is again through machining, and external surface is decorated, and is this patent hot pressing diamond bit finished product.
Claims (6)
1. diamond bit, comprise the working lining (3) of common diamond bit and be distributed in sintered body on the working lining, it is characterized in that, described sintered body is the heat stability polycrystal, comprise flat column and cylindric heat stability polycrystal (1), (2), the interior external diameter position of described flat column heat stability polycrystal (1) working lining at drill bit arranged evenly (3), described cylindric heat stability polycrystal (2) is arranged evenly at the position of drill bit working lining (3) near the center.
2. a kind of diamond bit according to claim 1 is characterized in that, the specification of described flat column heat stability polycrystal (1) is 3 * 3 * 10mm, and the specification of cylindric heat stability polycrystal (2) is φ 2 * 8mm or φ 2.5 * 8mm.
3. a kind of diamond bit according to claim 1 and 2, it is characterized in that, φ 2 * 8mm glomerocryst in the described cylindric heat stability polycrystal (2) is arranged evenly at close drill bit working lining (3) internal diameter direction, and φ 2.5 * 8mm glomerocryst is arranged evenly in the close external diameter direction of drill bit working lining (3).
4. a kind of diamond bit according to claim 1 is characterized in that, 3～4 heat stability polycrystals arranged evenly in the same cutting unit, and the heat stability polycrystal of same circumference cutting direction is overlapping to be 1%～2%.
5. a kind of diamond bit according to claim 1 is characterized in that, drill bit working lining (3) carcass material adopts tungsten carbide, YG8, nickel, cobalt, manganese, titanium and copper alloy; Drill bit working lining (3) tyre body hardness is HRC40～45, and abrasion resistance is (0.35～0.40) * 10
-5ML, diamond grade is SMD30～35 in drill bit working lining (3) carcass, and adamantine concentration is 88%, and adamantine granularity and content thereof are respectively: 40/45 accounts for 30%, 45/50 accounts for 40%, 60/70 and accounts for 20%, 80/100 and account for 10%.
6. a kind of diamond drill machine method for making head according to claim 1 comprises that the middle frequency furnace hot pressed sintering becomes diamond bit, is characterized in that, described middle frequency furnace sintering process is 985 ℃ of temperature, pressure 18MPa, temperature retention time 6min, 800 ℃ of tapping temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010124752 CN101818622A (en) | 2010-03-15 | 2010-03-15 | Diamond drill bit and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010124752 CN101818622A (en) | 2010-03-15 | 2010-03-15 | Diamond drill bit and manufacturing method thereof |
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| CN101818622A true CN101818622A (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010124752 Pending CN101818622A (en) | 2010-03-15 | 2010-03-15 | Diamond drill bit and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747964A (en) * | 2012-07-11 | 2012-10-24 | 王青俊 | Diamond hard alloy composite tooth for oil exploration and mining |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04221189A (en) * | 1990-12-19 | 1992-08-11 | Yoshida Tekkosho:Kk | Ceramics boring bit and manufacture thereof |
| CN200952353Y (en) * | 2006-04-24 | 2007-09-26 | 阎冠欣 | Steel body type diamond composite sheet drill bit body |
| CN201288512Y (en) * | 2008-11-19 | 2009-08-12 | 长沙锐合钻石工具有限公司 | Triangular glomerocryst drill |
-
2010
- 2010-03-15 CN CN 201010124752 patent/CN101818622A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04221189A (en) * | 1990-12-19 | 1992-08-11 | Yoshida Tekkosho:Kk | Ceramics boring bit and manufacture thereof |
| CN200952353Y (en) * | 2006-04-24 | 2007-09-26 | 阎冠欣 | Steel body type diamond composite sheet drill bit body |
| CN201288512Y (en) * | 2008-11-19 | 2009-08-12 | 长沙锐合钻石工具有限公司 | Triangular glomerocryst drill |
Non-Patent Citations (4)
| Title |
|---|
| 《探矿工程(岩土钻掘工程)》 20091125 周天盛等 卵砾石地层金刚石钻头的试验研究 69-71 1-6 第36卷, 第11期 2 * |
| 《湖南冶金》 19991030 储志强等 人造金刚石制品胎体粉末的研究 30-33 1-6 , 第05期 2 * |
| 《煤田地质与勘探》 20040225 刘晓阳等 金刚石-硬质合金复合齿钻头在卵砾石地层中的应用 63-64 1-6 第32卷, 第01期 2 * |
| 《金刚石与磨料磨具工程》 20070415 周红心 强化耐磨性钻头在卵砾石地层中的应用研究 55-57 1-6 , 第02期 2 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747964A (en) * | 2012-07-11 | 2012-10-24 | 王青俊 | Diamond hard alloy composite tooth for oil exploration and mining |
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Application publication date: 20100901 |