CN102425379A - Mosaic drill bit forming stable pre-crushing zone - Google Patents
Mosaic drill bit forming stable pre-crushing zone Download PDFInfo
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- CN102425379A CN102425379A CN201110285799XA CN201110285799A CN102425379A CN 102425379 A CN102425379 A CN 102425379A CN 201110285799X A CN201110285799X A CN 201110285799XA CN 201110285799 A CN201110285799 A CN 201110285799A CN 102425379 A CN102425379 A CN 102425379A
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- mosaics
- drill bit
- carcass
- diamond
- matrix
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Abstract
The invention relates to a mosaic drill bit forming a stable pre-crushing zone which comprises a drill bit steel body, a matrix, a rinsing water port and artificial diamond mosaics, wherein the rinsing water port is arranged on the matrix embedded with a diamond for dividing the matrix into four fan-shaped blocks; the cylindrical artificial diamond mosaics are obliquely embedded and welded on the fan-shaped blocks, one half of volume of each cylindrical artificial diamond mosaic is embedded in the matrix, and the other half of the volume of each cylindrical artificial diamond mosaic protrudes out of the labial surface of the matrix, thereby enabling two end points on the diagonal line of the longitudinal section of each cylinder to be posited on the same diameter of the surface of the matrix and enabling the embedded and welded mosaics to be uniformly distributed on the labial surface of the drill bit along the radial direction. When the drill bit is manufactured, the particle size of the diamond of the matrix needs to be 7%-14% of the diameter of the mosaics, the contact area between the fan-shaped blocks of the matrix and rock is 1.8-2.4 times of the total contact area, then the drill bit can form the stable pre-crushing zone during boring and the optimal boring effect can be further obtained. By using the drill bit, the mechanical drilling speed can be improved, the service life of the drill bit can be prolonged and the possibility of causing burning accidents of the drill bit due to accumulation of a large quantity of rock debris.
Description
Technical field
The present invention relates to a kind of mosaics drill bit of stablizing the precracking district that forms; Specifically relate to a kind ofly can in whole drilling process, form precracking district at the bottom of the stable hole; Guarantee in time to get rid of landwaste by the drill bit labial surface effectively, thereby help improving the detritus ability of drill bit, prevent burning of bits accident; Significantly improve the catalase instrument of rate of penetration, belong to the geological drilling field.
Background technology
For overcoming the bottleneck of shortage of resources, the deep core drilling workload cumulative year after year of the big investigation of China's geology is badly in need of further improving rate of penetration and bit life.Theory and practice research all proves, if in drilling process, there has been the precracking district at the bottom of the hole, then can increase substantially the detritus efficient of drill bit, reduces power consumption, and prolongs bit life.
In existing mosaics drill bit; The diamond-impregnated bit of existing numerous species; But the diamond-impregnated bit of this type is not scrutinized the reasonable installing position of cutting element on the carcass secter pat usually; Adamantine particle diameter in the carcass is not proposed the rational matching scope yet, thereby can not guarantee to creep into the stable precracking district of formation in the process whole, and with the hidden danger that burning of bits accident takes place.
Summary of the invention
The objective of the invention is to solve the problem that prior art exists; And start with the ratio of contact area at the bottom of the hole from relation, secter pat and the mosaics of selecting mosaics angle of slope, carcass diamond particle diameter and mosaics diameter, improve the structure design of diamond bit, to guarantee drill bit precracking district at the bottom of forming stable hole during the entire job; Get rid of landwaste by labial surface timely and effectively; Prevent that bit matrix from being burnt, thereby improve the detritus ability of drill bit, finally significantly improve rate of penetration.
For realizing above-mentioned purpose; The technical scheme that the present invention adopted is: a kind of mosaics drill bit of stablizing the precracking district that forms is provided; The drill steel body links to each other with diamantiferous carcass, and the described flushing mouth of a river is located on the diamond impregnated carcass, and the flushing mouth of a river is divided into 4 secter pats to carcass; The welding-on that all tilts on the described secter pat has 2 ~ 3 cylindrical diamond mosaics; Each cylindrical diamond mosaics has half volume to be embedded in the carcass; Second half volume protrudes from the carcass labial surface; Cornerwise two end points in cylinder longitudinal section are positioned on the same diameter in carcass surface, and the cylindrical diamond mosaics of welding-on radially evenly distributes on the drill bit labial surface.
Diamond particle diameter in the diamantiferous carcass of the present invention should be 7% ~ 14% of mosaics diameter.The contact area of said diamantiferous carcass secter pat and rock should be 1.8 ~ 2.4 times of total contact area of mosaics and rock in the secter pat.The present invention proves from theory and practice research; When diamantiferous carcass diamond particle diameter is 7% ~ 14% of a mosaics diameter; And the contact area of diamantiferous carcass secter pat and rock is 1.8 ~ 2.4 times of total contact area of mosaics and rock, then will obtain best drilling effect.
In drilling process, at first form the precracking district on institute rock drilling surface by the mosaics that protrudes from carcass; And follow the whole drilling process of drill bit; By the shattering process at the bottom of the precracking district accomplishes the hole of the diamond in the carcass, take the landwaste that is broken to aperture ground then by flushing liquor.Because mosaics anterior (along the drill bit gyratory directions) protrudes from the carcass surface, thus the space between mosaics and carcass labial surface with the sump portion landwaste, these landwaste help the adamantine sword that grinds out of carcass.When each mosaics that protrudes from the carcass labial surface all contacts with rock and has an effect, drill bit will obtain maximum detritus ability.
Research shows; If adamantine particle diameter is less than 7% of the mosaics diameter in the carcass; The impregnated with diamond of so this particle diameter is unfavorable for the broken effectively bulky grain landwaste that gathers at the mosaics rear, and landwaste self can not be through the little gap between at the bottom of carcass labial surface (diamond goes out sword) and the hole.The bulky grain landwaste that is not broken will accumulate at the bottom of the hole in the gap, increase the wearing and tearing to carcass.So, increased the power consumption of detritus, reduce the life-span of drill bit, but also burning of bits accident possibly occur.If the diamond particle diameter in the carcass is greater than 14% of mosaics diameter, cutting grain will be ground very carefully so, and the gap between being significantly less than at the bottom of carcass labial surface and the hole will be rinsed liquid fully and take away.This goes out sword for the normal wear of carcass and carcass diamond is disadvantageous.In this case, the operating efficiency of drill bit also can reduce.Therefore, best carcass diamond particle diameter be the mosaics diameter 7% ~ 14% between.
Research shows that with the difference of physical-mechanical properties of rock, the width of catalase groove can reach more than 2 times of cutting element wedging width.If the ratio of the gross contact area of cutting element is less than 1.8 times in the contact area of carcass secter pat and rock and the secter pat; The width of broken groove will reduce; At the bottom of cutting element moves past metapore, will stay not broken phacolith so in the drilling process, and force the diamond of impregnated layer to have to these phacoliths are replenished broken.For this reason, will increase power consumption, and drilling speed is descended.If the ratio of cutting element gross contact area is greater than 2.4 times in carcass secter pat contact area and the secter pat; So in drilling process at first the cutting element of wedging rock will set up and grow sufficient precracking district, the cutting element of following is thereafter just milled the landwaste in precracking district thinner once more.For this reason, be consumed in precracking district rock and repeat broken energy and will increase, and make and accumulate in diamond and go out the rock dust amount increase in the sword gap, also possibly cause the burning of bits.Have only when mosaics in the contact area of carcass secter pat and rock and the secter pat and rock the ratio of gross contact area when being 1.8 ~ 2.4 times, the catalase process of drill bit is only optimum.
The advantage of drill bit of the present invention is: drill bit is started with the ratio of contact area at the bottom of the hole from relation, secter pat and the mosaics of selecting mosaics angle of slope, carcass diamond particle diameter and mosaics diameter; Improve the structure design of diamond bit, can in whole drilling process, form precracking district at the bottom of the stable hole, assurance is in time got rid of landwaste by the drill bit labial surface effectively; Thereby cpable of lowering power consumption; Prevent burning of bits accident, significantly improve rate of penetration, and prolong bit life.
Description of drawings
Fig. 1 is a kind of mosaics drill bit general structure sketch map of stablizing the precracking district that forms of the present invention.
Fig. 2 is a drill bit work labial surface structural representation of the present invention.
Fig. 3 is the enlarged diagram in Fig. 2 А-А cross section.
Among the figure: 1-drill steel body, 2-carcass, the 3-flushing mouth of a river, 4-cylindrical diamond mosaics.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.
Embodiment 1: a kind of mosaics drill bit of stablizing the precracking district that forms of the present invention; Its structure is as shown in Figure 1; Comprise drill steel body 1, diamantiferous carcass 2, the flushing mouth of a river 3 and diamond mosaics 4; Described drill steel body 1 adopts the pressure sintering manufacturing, and drill steel body 1 links to each other with diamantiferous carcass 2.On diamond impregnated carcass 2, be provided with the flushing mouth of a river 3, the described flushing mouth of a river 3 is divided into 4 secter pats to carcass; By mould at each secter pat 3 cylindrical diamond mosaics 4 of welding-on that tilt; When cylindrical diamond mosaics was installed, each cylindrical diamond mosaics 4 had half volume to be embedded in the carcass 2, and second half volume protrudes from the carcass labial surface, and cornerwise two end points in cylinder longitudinal section are positioned on the same diameter in carcass surface; Drill bit work labial surface structure such as Fig. 2, shown in Figure 3, the cylindrical diamond mosaics of welding-on radially evenly distribute on the drill bit labial surface.
The present invention also need control the diamond particle diameter in the diamantiferous carcass
d 1Should be the mosaics diameter
d 27%, and the contact area of carcass secter pat and rock should be 1.8 times of total contact area of mosaics and rock in the secter pat.Such drill bit could guarantee in drilling process, to obtain optimum efficiency, and prevents the generation of burning of bits accident.
A kind of mosaics drill bit of stablizing the precracking district that forms of the present invention is worked by following mode:
Be delivered to axial load and moment of torsion on the secter pat of the diamantiferous carcass 2 of drill bit when creeping into; At this moment the cylindrical diamond mosaics 4 that protrudes from carcass 2 is participated in the precracking of rock; Form both macro and micro crackle network; And the diamond on the carcass 2 is accomplished follow-up catalase process, and the precracking of rock is accompanied by the whole drilling process of drill bit.Because the preferred ratio of diameter ratio and carcass 2 secter pat contacts area and total contact area of mosaics 4 of diamond particle diameter and mosaics 4 in the carcass 2; Make landwaste undersized that fragmentation the gets off gap between at the bottom of carcass labial surface and the hole; Most of landwaste will be rinsed liquid and be carried into ground, aperture smoothly, the remaining landwaste of a part will help the carcass labial surface from sharp.Therefore, can reduce even eliminate at the bottom of the hole energy consumption of the bulky grain landwaste being carried out second-time breakage, improve rate of penetration, eliminate because of landwaste in a large number and accumulate in the possibility that causes burning of bits accident at the bottom of the hole.
A kind of mosaics drill bit of stablizing the precracking district that forms of the present invention, its structure and working method are with embodiment 1, and different is 2 the cylindrical diamond mosaics of welding-on that on each secter pat, only tilt; Diamond particle diameter in the diamantiferous carcass
d 1Should be the mosaics diameter
d 214%; And the contact area of carcass secter pat and rock should be 2.4 times of total contact area of mosaics and rock in the secter pat.Such drill bit also can guarantee in drilling process, to obtain optimum efficiency, and prevents the generation of burning of bits accident.
Claims (3)
1. the mosaics drill bit in precracking district is stablized in a formation; Comprise drill steel body, diamantiferous carcass, the flushing mouth of a river and diamond mosaics; The drill steel body links to each other with diamantiferous carcass; It is characterized in that: the described flushing mouth of a river is located on the diamond impregnated carcass, and the flushing mouth of a river is divided into 4 secter pats to carcass; The welding-on that all tilts on the described secter pat has 2 ~ 3 cylindrical diamond mosaics; Each cylindrical diamond mosaics has half volume to be embedded in the carcass; Second half volume protrudes from the carcass labial surface; Cornerwise two end points in cylinder longitudinal section are positioned on the same diameter in carcass surface, and the cylindrical diamond mosaics of welding-on radially evenly distributes on the drill bit labial surface.
2. a kind of mosaics drill bit of stablizing the precracking district that forms according to claim 1, it is characterized in that: the diamond particle diameter in the described diamantiferous carcass should be 7% ~ 14% of mosaics diameter.
3. a kind of mosaics drill bit of stablizing the precracking district that forms according to claim 1 is characterized in that: the contact area of said diamantiferous carcass secter pat and rock should be 1.8 ~ 2.4 times of total contact area of mosaics and rock in the secter pat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110285799XA CN102425379A (en) | 2011-09-23 | 2011-09-23 | Mosaic drill bit forming stable pre-crushing zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110285799XA CN102425379A (en) | 2011-09-23 | 2011-09-23 | Mosaic drill bit forming stable pre-crushing zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102425379A true CN102425379A (en) | 2012-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110285799XA Pending CN102425379A (en) | 2011-09-23 | 2011-09-23 | Mosaic drill bit forming stable pre-crushing zone |
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| CN (1) | CN102425379A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798073A (en) * | 2019-04-11 | 2019-05-24 | 吉林大学 | A kind of impregnated diamond drill using frictional heat energy detritus |
| CN113622827A (en) * | 2021-08-31 | 2021-11-09 | 中国地质大学（武汉） | Diamond bit for drilling into fractured hard rock stratum |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0391683A1 (en) * | 1989-04-05 | 1990-10-10 | De Beers Industrial Diamond Division (Pty) Limited | Drilling |
| RU2263197C1 (en) * | 2004-05-06 | 2005-10-27 | Институт сверхтвердых материалов им. В.Н. Бакуля НАН Украины | Bit |
| CN2932362Y (en) * | 2006-07-07 | 2007-08-08 | 长沙矿冶研究院 | Impregnated diamond core bit matrix structure |
| CN101705791A (en) * | 2009-11-20 | 2010-05-12 | 长沙锐合钻石工具有限公司 | Triangular polycrystalline diamond bit for geologic exploration and manufacturing method thereof |
| CN201963235U (en) * | 2011-03-14 | 2011-09-07 | 唐山市金石超硬材料有限公司 | Diamond core bit |
-
2011
- 2011-09-23 CN CN201110285799XA patent/CN102425379A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0391683A1 (en) * | 1989-04-05 | 1990-10-10 | De Beers Industrial Diamond Division (Pty) Limited | Drilling |
| RU2263197C1 (en) * | 2004-05-06 | 2005-10-27 | Институт сверхтвердых материалов им. В.Н. Бакуля НАН Украины | Bit |
| CN2932362Y (en) * | 2006-07-07 | 2007-08-08 | 长沙矿冶研究院 | Impregnated diamond core bit matrix structure |
| CN101705791A (en) * | 2009-11-20 | 2010-05-12 | 长沙锐合钻石工具有限公司 | Triangular polycrystalline diamond bit for geologic exploration and manufacturing method thereof |
| CN201963235U (en) * | 2011-03-14 | 2011-09-07 | 唐山市金石超硬材料有限公司 | Diamond core bit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798073A (en) * | 2019-04-11 | 2019-05-24 | 吉林大学 | A kind of impregnated diamond drill using frictional heat energy detritus |
| CN109798073B (en) * | 2019-04-11 | 2023-10-13 | 吉林大学 | Diamond-impregnated drilling tool for crushing rock by friction heat energy |
| CN113622827A (en) * | 2021-08-31 | 2021-11-09 | 中国地质大学（武汉） | Diamond bit for drilling into fractured hard rock stratum |
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Application publication date: 20120425 |