CN103982139B - A kind of high carcass bores tooth and preparation method thereof - Google Patents
A kind of high carcass bores tooth and preparation method thereof Download PDFInfo
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- CN103982139B CN103982139B CN201410210867.XA CN201410210867A CN103982139B CN 103982139 B CN103982139 B CN 103982139B CN 201410210867 A CN201410210867 A CN 201410210867A CN 103982139 B CN103982139 B CN 103982139B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 97
- 239000010432 diamond Substances 0.000 claims abstract description 36
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 36
- 230000007704 transition Effects 0.000 claims abstract description 31
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 239000011229 interlayer Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 27
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 13
- 238000005553 drilling Methods 0.000 abstract description 11
- 239000000758 substrate Substances 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 16
- 239000011435 rock Substances 0.000 description 10
- 238000005728 strengthening Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910052718 tin Inorganic materials 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 3
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004826 seaming Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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Abstract
The invention discloses a kind of high carcass and bore tooth and preparation method thereof, including diamantiferous Metal Substrate working lining, not diamantiferous transition zone and weld layer, thickness direction in tooth working lining is bored at high carcass, namely sector radial direction adds 1-4 layer enhancement Layer, by compressing, sintering process, make enhancement Layer and bore tooth working lining strong bonded, it is possible to significantly promoting by boring the Resisting fractre intensity after tooth is fabricated to drill bit. The high carcass thus made bores tooth, is not easily broken, it is possible to normal consumption makes to use until exhausted to containing diamond layer, thus more conventional drill bit has much higher service life; Strengthen the existence of interlayer, it is possible to form annular tank boring tooth work surface simultaneously, be conducive to raising to creep into ratio pressure, improve drilling efficiency, improve simultaneously and creep into stability and chip removal, cooling capacity.
Description
Technical field
The invention belongs to geological drilling and bore tooth field, bore tooth and preparation method thereof particularly to a kind of high carcass, it is adaptable to making long-life high efficiency geological drill bit, especially deep prospecting creeps into and uses geological drill bit.
Background technology
Conventional PCD geological drill bit processing technology does not have too big change for a long time, generally adopts the integral sintered method of intermediate frequency formula, by steel body together with boring toothed portion and passing through high temperature sintering. In recent years, minimizing along with superficial part mineral resources allowable exploitation, mineral resources exploration is progressively to deep (> 1000m), ultra-deep portion (> 3000m) stratum development, owing to conventional bit is low for service life, average life is typically less than 60m, causes in drilling construction, it is often necessary to removes drilling rod and carries out bit change-over, the time removing drill bit consumption often accounts for the 40% of whole engineering construction, leverages efficiency of construction.
At present, the raising measure of bit life is mainly included the adjustment etc. boring the optimization of tooth formula, diamond parameter. For boring tooth formula, tooth tyre body hardness, abrasiveness is bored typically via improving, thus reducing the rate of wear of carcass when creeping into, the method is very limited amount of for the raising of bit life, because tyre body hardness, mar proof can unconfined promote, can only be that the abrasion with diamond matches, otherwise can cause after last layer Diamond Wear, new diamond cannot go out sword to carry out creeping into rock work at quarter, causes drill bit " skidding ", the burning of bits; For diamond parameter, usually by improving diamond concentration, adjusting the methods such as diamond grit in the hope of reaching to improve the purpose in life-span, or employing high grade diamond, so that the rate of depreciation of single diamond reduces, but, this kind of method is also extremely limited for the lifting of bit life, diamond concentration can not arbitrarily increase, and concentration is too high, and diamond is plated reduced capability by carcass, diamond is prone to come off, and frequently can lead to drilling life of bit lower.
When prior art adopting independent sintering, method for laser welding manufacture geological drill bit, generally require increase and bore tooth height, to improve bit life, to reduce the frequency that makes a trip of drill bit in drilling project, improve engineering efficiency. In recent years, also it is related to adopt new construction design, thus promoting the technology of bit life, such as Chinese patent CN101353946A, disclose the diamond core bit at a kind of renewable mouth of a river, propose from appropriate design structure, realize boring the multiple stratification at tooth and the mouth of a river, thus adding the used height of carcass, but the method complex manufacturing technology, must adopt the integral sintered method manufacture of intermediate frequency, and have that diamond concentration is poor inside and outside being unfavorable for making or the brill tooth of the special carcass structure such as inside and outside carcass formulation differences.
Summary of the invention
The technical issues that need to address of the present invention are to overcome the deficiencies in the prior art, it is provided that a kind of high carcass bores tooth, to solve the strengthening problem of preparation long-life geological drill bit high carcass brill tooth.
The high carcass of one provided by the invention bores tooth, including working lining, transition zone and weld layer, working lining is diamantiferous metal-base composites, transition zone be working lining with weld layer be connected material, transition zone is without diamond, and weld layer is the connecting portion boring tooth with steel body, and weld layer is without diamond, in described brill tooth working lining, thickness direction adds enhancement Layer, enhancement Layer and brill tooth working lining strong bonded.
The described highly preferred 15-35mm, the highly preferred 12-30mm of working lining that bore tooth.
Described enhancement Layer realizes preferably by sintering with boring tooth working lining strong bonded.
The preferred 1-4 layer of described enhancement Layer.
The described preferred glass fibre of enhancement Layer material, carbon fiber, rustless steel, steel alloy have the material of higher-strength.
Described enhancement Layer material is preferably lamellar, array arrangement netted, thread.
The thickness of described enhancement Layer material is according to boring the design of transverse tooth thickness degree, it is preferable that 0.5-1.5mm.
Described enhancement Layer arc length along the circumferential direction is preferably greater than bores the 75% of sector length, it is preferably greater than along the length boring tooth height direction and bores the 80% of tooth working lining, and enhancement Layer preferably penetrates the binding site of working lining and transition zone, the degree of depth that enhancement Layer extend into transition zone is made to be preferably greater than 0.5mm.
The described surfaces externally and internally boring tooth can be inlayed glomerocryst or not inlay glomerocryst, and glomerocryst inlays position can in transition zone part, it is possible in working lining part, or two parts have concurrently; Boring broken rock abrasive particle in tooth working lining can be diamond, it is also possible to be the mixture of diamond and broken glomerocryst.
The present invention also provides for the preparation method that a kind of high carcass bores tooth, comprises the following steps:
1) remove reinforcement material surface smut, oxide layer, according to boring tooth radial arc, reinforcement material is bent to required radian, use as interlayer;
2) employing is colded pressing and is suppressed brill tooth carcass thin slice, and thin slice all comprises working lining, transition zone and weld layer;
3) enhancement Layer is sandwiched in the middle of thin slice respectively, load mould, complete high carcass by hot pressing and bore the making of tooth.
Described removal reinforcement material surface smut, oxide layer, refer to before use, by deoiling, sandblasting, the operation such as cleaning remove reinforcement material surface smut, oxide layer, to improve material and the bond strength boring tooth carcass.
The described working lining boring tooth carcass thin slice, working lining composition is generally the complex of metallic bond carcass and diamond particles, melts combine agent prescription designs according to rock drilling Properties of Objects, it is generally WC, Co, Ni, Cu etc. adding portion low-melting-point metal composition, diamond particles is high grade Monosized powder or combination granularity, diamond concentration is generally 50-150% (emery wheel concentration system, volumetric concentration).
Described colds pressing, it is preferable that idiosome consistency of colding pressing reaches 50-70%.
Described sandwiches in the middle of thin slice respectively by enhancement Layer, loads mould, it is preferable that thin slice and enhancement Layer is fitted together, assembly is put into mould, then pours transition zone powder and weld layer powder on the top of assembly respectively into. When enhancement Layer height is certain, by hot pressing, enhancement Layer can penetrate the interface of working lining and transition zone, thus having ensured the averaging effect of enhancement Layer, thus can produce the high carcass of strengthening and boring tooth.
Described hot pressing, it is preferable that be sintered by vacuum resistance hot press, sintering temperature is 750-900 DEG C, and total head pressure is 20-30MPa, and temperature retention time is 3-10min.
Further, it is preferable that be sintered by vacuum resistance hot press, sintering temperature is 780-880 DEG C, and total head pressure is 20-30MPa, and temperature retention time is 3-10min.
High carcass after strengthening is bored tooth by solder side light, planarizing process, employing laser-beam welding machine realization brill tooth welds with steel body, carry out the processing such as interior external flume, screw thread, chamfering afterwards, the high carcass with strengthening can be produced and bore the diamond core bit of tooth.
The drill bit employing the technology of the present invention carries out rock stratum probing, can ensure that the normal continuously of high carcass working lining uses, and form one or several spill guide groove boring tooth work surface, drill bit directional drilling can be ensured, and improve creep into than pressure, increase creep into cooling surface, high drilling efficiency can be provided simultaneously with and creep into the life-span with long, deep drilling is had great importance.
Compared with prior art, advantages of the present invention:
1) present invention passes through interlayer strengthening mechanism, adopt the clip type distribution of the internal Materials with High Strength of carcass, so that working lining can all normally use, and by special internal structure design and process for making, achieve the purpose of intermediate plate strengthening, make brill tooth strengthen, the Resisting fractre intensity of boring tooth is greatly improved, it is possible to ensure that high carcass bores tooth and in use do not rupture.
2) method adopting the present invention, strengthened by intermediate plate, brill tooth flexural strength, shear strength is made to be increased dramatically, and owing to intermediate plate extend into without in diamond transition zone, brill tooth entirety fracture plane of weakness is made to transfer to below not diamantiferous transition zone, bulk strength is high, is avoided that the generation boring tooth improper fracture when drill bit uses.
3) present invention is by arranging transition zone, weld layer, the laser weld of geological drill bit can be realized, bore the new compacting of tooth employing, sintering process method and structural design and can improve the powder metallurgy sintered quality boring tooth, the service behaviour making brill tooth itself gets a promotion, high carcass bores tooth can increase substantially the service life of drill bit, reduce and creep into the frequency that makes a trip, improve engineering efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation that high carcass bores tooth
Fig. 2 is sandwich material schematic shapes
Fig. 3 is that interlayer strengthens high carcass brill tooth schematic diagram
Figure identifies: 1, diamond abrasive grain, 2, working lining, 3, transition zone, 4, weld layer, 5, enhancement Layer material, 6, thin slice.
Detailed description of the invention
With embodiment, the invention will be further described below, but the invention is not limited in these embodiments.
As shown in Figure 1: it is 15-35mm that high carcass bores the height of tooth, it is made up of the working lining 2 containing diamond abrasive grain 1 and the transition zone 3 without diamond abrasive grain 1 and weld layer 4, working lining 2 is the main body boring the broken rock of tooth, weld layer 4 is used for connecting drilling bit steel body, transition zone 3 be working lining 2 with weld layer 4 be connected part, be used for improving brill tooth bulk strength.
As shown in Figure 2: enhancement Layer can select glass fibre, carbon fiber, rustless steel, steel alloy etc. to have the material of high intensity, the characteristic such as high temperature resistant, the shape of material can be lamellar, netted, small pieces or thread array arrangement etc., its thickness is determined according to the thickness boring tooth, is generally 0.5-1.5mm.
As shown in Figure 3: owing to the working lining 2 containing diamond 1 is to bore the part that tooth intensity is the weakest, therefore enhancement Layer material 5 need to be evenly distributed in working lining 2, and penetrate the bottom of working lining 2, making weak fracture shift towards the transition zone 3 without diamond 1 or weld layer 4, being increased dramatically thus boring tooth Resisting fractre ability.
Embodiment 1:
Brill tooth for �� 59/ �� 41.5, creeping into object is drillability rank 9 grades, medium abrasive rock, it is 20mm that tooth total height is bored in design, wherein working lining height is 16.5mm, transition zone is 1.5mm, weld layer is 2mm, boring tooth working lining formula is WC40-60%, Co10-15%, Ni5-10%, the element 15-30% such as Cu, Sn, diamond concentration is 65-85%, and granularity is the combination granularity of 40/45,45/50, and design enhancement Layer material is sheet fiberglass sheet, single thickness 0.65mm, is evenly distributed two-layer; Adopt special punching block, suppress 2.45mm thickness, the three layers sector interior, domestic and abroad of 30mm length bores tooth carcass thin slice, 17mm length, both sides, arc length direction are respectively shorter than the enhancement Layer two-layer altogether boring tooth 0.5mm between thin slice, and near weld layer end, putting into after being assembled in graphite jig in vacuum resistance hot press and sinter, sintering temperature is 860 DEG C, and total head pressure is 25MPa, temperature retention time is 6min, can burn out fibre strengthening height carcass geology and bore tooth.
Embodiment 2:
Brill tooth for �� 59/ �� 41.5, creeping into object is drillability rank 9 grades, medium abrasive rock, it is 15mm that tooth total height is bored in design, wherein working lining height is 12mm, transition zone is 1.5mm, weld layer is 1.5mm, boring tooth working lining formula is WC40-60%, Co10-15%, Ni5-10%, the element 15-30% such as Cu, Sn, diamond concentration is 65-85%, and granularity is the combination granularity of 40/45,45/50, and design enhancement Layer material is netlike carbon fiber sheet, single thickness 0.50mm, is evenly distributed two-layer; Adopt special punching block, suppress 2.45mm thickness, the three layers sector interior, domestic and abroad of 20mm length bores tooth carcass thin slice, 10mm length, both sides, arc length direction are respectively shorter than the enhancement Layer boring tooth 0.5mm between thin slice, and near weld layer end, putting into after being assembled in graphite jig in vacuum resistance hot press and sinter, sintering temperature is 750 DEG C, and total head pressure is 30MPa, temperature retention time is 10min, can burn out fibre strengthening height carcass geology and bore tooth.
Embodiment 3:
Brill tooth for �� 59/ �� 41.5, creeping into object is drillability rank 9 grades, medium abrasive rock, it is 35mm that tooth total height is bored in design, wherein working lining height is 30mm, transition zone is 3mm, weld layer is 2mm, boring tooth working lining formula is WC40-60%, Co10-15%, Ni5-10%, the element 15-30% such as Cu, Sn, diamond concentration is 65-85%, and granularity is the combination granularity of 40/45,45/50, and design enhancement Layer material is thread alloy-steel sheet, single thickness 1.50mm, is evenly distributed two-layer; Adopt special punching block, suppress 2.45mm thickness, the three layers sector interior, domestic and abroad of 40mm length bores tooth carcass thin slice, 23mm length, both sides, arc length direction are respectively shorter than the enhancement Layer boring tooth 0.5mm between thin slice, and near weld layer end, putting into after being assembled in graphite jig in vacuum resistance hot press and sinter, sintering temperature is 900 DEG C, and total head pressure is 20MPa, temperature retention time is 3min, can burn out intermediate plate and strengthen high carcass geology brill tooth.
Embodiment 4:
Brill tooth for �� 75/ �� 47.5, creeping into object is drillability rank 7 grades, strong abrasiveness rock, and it is 30mm that tooth total height is bored in design, wherein working lining height 25mm, transition zone is 3mm, weld layer is 2mm, and boring tooth working lining formula is WC50-70%, Co10-15%, Ni6-12%, the elements such as Cu, Sn are 15-25% altogether, and diamond concentration is 75-100%, and granularity is the combination granularity of 40/45,45/50,50/60;Design enhancement Layer material is stainless steel substrates, and single thickness is 0.8mm, bores tooth thickness direction and is evenly distributed two-layer, is bent by steel disc by required radian, and sandblasting, cleaning treatment; Cold stamping die is firstly added load weighted working lining internal layer powder, add ground floor arc steel plate, add working lining middle level powder afterwards, rear addition second layer arc steel plate, it is subsequently adding working lining outer layer powder, suppressing the brill tooth working lining containing enhancement Layer by cold press, thickness is about 13.1mm, and length is 40mm; This working lining is loaded in graphite jig, then transition zone and weld layer powder are poured respectively into, it is loaded on graphite mo(u)ld seaming chuck, put in vacuum resistance hot press and be sintered, sintering temperature is 880 DEG C, and total head pressure is 30MPa, and temperature retention time is 8min, stainless steel substrates can be burnt out and strengthen high carcass geology brill tooth, bore tooth entirety Resisting fractre intensity and bore tooth raising 40-110% compared to routine.
Embodiment 5:
Brill tooth for �� 75/ �� 47.5, creeping into object is drillability rank 7 grades, strong abrasiveness rock, and it is 25mm that tooth total height is bored in design, wherein working lining height 20mm, transition zone is 3mm, weld layer is 2mm, and boring tooth working lining formula is WC50-70%, Co10-15%, Ni6-12%, the elements such as Cu, Sn are 15-25% altogether, and diamond concentration is 75-100%, and granularity is the combination granularity of 40/45,45/50,50/60; Design enhancement Layer material is stainless steel substrates, and single thickness is 0.8mm, bores tooth thickness direction and is evenly distributed two-layer, is bent by steel disc by required radian, and sandblasting, cleaning treatment; Cold stamping die is firstly added load weighted working lining internal layer powder, add ground floor arc steel plate, add working lining middle level powder afterwards, rear addition second layer arc steel plate, it is subsequently adding working lining outer layer powder, suppressing the brill tooth working lining containing enhancement Layer by cold press, thickness is about 13.1mm, and length is 35mm; This working lining is loaded in graphite jig, then transition zone and weld layer powder are poured respectively into, it is loaded on graphite mo(u)ld seaming chuck, put in vacuum resistance hot press and be sintered, sintering temperature is 780 DEG C, and total head pressure is 30MPa, and temperature retention time is 8min, stainless steel substrates can be burnt out and strengthen high carcass geology brill tooth, bore tooth entirety Resisting fractre intensity and bore tooth raising 40-110% compared to routine.
Claims (12)
1. a high carcass bores tooth, including working lining, transition zone and weld layer, working lining is diamantiferous metal-base composites, transition zone be working lining with weld layer be connected material, transition zone is without diamond, and weld layer is the connecting portion boring tooth with steel body, and weld layer is without diamond, it is characterized in that: in described brill tooth working lining, thickness direction adds enhancement Layer, enhancement Layer and brill tooth working lining strong bonded;
Described enhancement Layer arc length along the circumferential direction is more than boring the 75% of sector length, the length in tooth height direction is bored more than boring the 80% of tooth working lining in edge, and enhancement Layer penetrates the binding site of working lining and transition zone, enhancement Layer is made to extend into the degree of depth of transition zone more than 0.5mm.
2. high carcass according to claim 1 bores tooth, it is characterised in that: the described height boring tooth is 15-35mm, and working lining height is 12-30mm.
3. high carcass according to claim 1 bores tooth, it is characterised in that: described enhancement Layer realizes by sintering with boring tooth working lining strong bonded.
4. high carcass according to claim 1 bores tooth, it is characterised in that: described enhancement Layer is 1-4 layer.
5. high carcass according to claim 1 bores tooth, it is characterised in that: described enhancement Layer material is glass fibre, carbon fiber, rustless steel or steel alloy.
6. high carcass according to claim 1 bores tooth, it is characterised in that: described enhancement Layer material is lamellar, netted or thread array arrangement.
7. high carcass according to claim 1 bores tooth, it is characterised in that: the thickness of described enhancement Layer material is 0.5-1.5mm.
8. the preparation method that high carcass bores tooth, comprises the following steps:
1) remove reinforcement material surface smut, oxide layer, according to boring tooth radial arc, reinforcement material is bent to required radian, use as interlayer;
2) employing is colded pressing and is suppressed brill tooth carcass thin slice, and thin slice all comprises working lining, transition zone and weld layer;
3) enhancement Layer is sandwiched in the middle of thin slice respectively, load mould, complete high carcass by hot pressing and bore the making of tooth.
9. the preparation method that high carcass according to claim 8 bores tooth, it is characterised in that: described colds pressing, and idiosome consistency of colding pressing reaches 50-70%.
10. the preparation method that high carcass according to claim 8 bores tooth, it is characterized in that: described sandwiches in the middle of thin slice respectively by enhancement Layer, load mould, it is that thin slice and enhancement Layer are fitted together, assembly is put into mould, then pours transition zone powder and weld layer powder on the top of assembly respectively into.
11. the preparation method that high carcass according to claim 8 bores tooth, it is characterised in that: described hot pressing, for being sintered by vacuum resistance hot press, sintering temperature is 750-900 DEG C, and total head pressure is 20-30MPa, and temperature retention time is 3-10min.
12. the preparation method that high carcass according to claim 11 bores tooth, it is characterised in that: sintering temperature is 780-880 DEG C.
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| CN107127347B (en) * | 2017-05-18 | 2018-12-11 | 中国有色桂林矿产地质研究院有限公司 | The method that tooth is bored using base assembling sinter molding production |
| CN107165582B (en) * | 2017-07-05 | 2019-09-03 | 中南大学 | A diamond helically positioned and distributed ultra-thin layer composite drill bit and its manufacturing process |
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| CN2078789U (en) * | 1990-12-03 | 1991-06-12 | 地质矿产部探矿工程研究所 | Diamond bit for oil drilling |
| EP0547012A3 (en) * | 1991-12-13 | 1993-09-22 | Unicoat S.R.L. | Composite insert for cutting tools |
| CN2281411Y (en) * | 1996-09-16 | 1998-05-13 | 孙泰林 | Drill bit with steel body and circular blades |
| CN201269050Y (en) * | 2008-03-28 | 2009-07-08 | 桂林矿产地质研究院 | Diamond-impregnated bit |
| CN102174877A (en) * | 2011-01-06 | 2011-09-07 | 深圳市海明润实业有限公司 | A polycrystalline diamond composite sheet |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008085616A2 (en) * | 2006-11-30 | 2008-07-17 | Boart Longyear | Fiber-containing diamond-impregnated cutting tools |
| JP5762877B2 (en) * | 2011-06-30 | 2015-08-12 | 株式会社 中部ロックドリルサービス | Drilling bit, excavator and concrete structure using the same, rock drilling method and crushing method |
| GB201209453D0 (en) * | 2012-05-29 | 2012-07-11 | Element Six Gmbh | Constructions comprising polycrystalline material,tools comprising same and method for making same |
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2014
- 2014-05-19 CN CN201410210867.XA patent/CN103982139B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2078789U (en) * | 1990-12-03 | 1991-06-12 | 地质矿产部探矿工程研究所 | Diamond bit for oil drilling |
| EP0547012A3 (en) * | 1991-12-13 | 1993-09-22 | Unicoat S.R.L. | Composite insert for cutting tools |
| CN2281411Y (en) * | 1996-09-16 | 1998-05-13 | 孙泰林 | Drill bit with steel body and circular blades |
| CN201269050Y (en) * | 2008-03-28 | 2009-07-08 | 桂林矿产地质研究院 | Diamond-impregnated bit |
| CN102174877A (en) * | 2011-01-06 | 2011-09-07 | 深圳市海明润实业有限公司 | A polycrystalline diamond composite sheet |
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