CN103184833A - Diamond bit with large saw-teeth - Google Patents
Diamond bit with large saw-teeth Download PDFInfo
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- CN103184833A CN103184833A CN2012105042904A CN201210504290A CN103184833A CN 103184833 A CN103184833 A CN 103184833A CN 2012105042904 A CN2012105042904 A CN 2012105042904A CN 201210504290 A CN201210504290 A CN 201210504290A CN 103184833 A CN103184833 A CN 103184833A
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- bit
- drill
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- diamond
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Abstract
The invention aims to provide a diamond bit with large saw-teeth, which is good in cutting force and durability, high in effectiveness for a given period of time, pipe-sticking avoidance, and good adaptive capacity for weak abrasive formation. The diamond bit comprises a body and drill teeth, wherein the drill teeth adopt a polygonal shape or a convex saw-toothed shape, and are annularly arranged at the top end of the body; and an inclined plane is formed at the top end of each drill tooth.
Description
Technical field
The present invention relates to a kind of probing with big sawtooth diamond bit.
Background technology
In industries such as mining, coal mining and oilfield exploitation, the drill bit that geological drilling adopts generally adopts diamond bit, diamond particles is depended on the bit cutting face by the mode of inlaying sintering or plating, whole drill bit does not have movable component, relatively simple for structure, having high strength, high abrasion and shock proof ability, is one of world's drilling well eighties in 20th century three big new technologies.The on-the-spot proof of using when diamond bit creeps into, has advantages such as speed is fast, drilling depth is many, the life-span is long, stable working, down-hole accident is few, wellbore quality is good in soft-medium ground.Diamond bit not only service time long, can also reuse, return that the multiple diamond bit of repair in shop uses and the diamond bit result of use of dispatching from the factory is similar, saving drilling cost that can be a large amount of.Whether the quality of drill quality, bite type and formation lithology adapt to, and play an important role to accelerating bit speed and improving single footage per bit.Bore many drill bits that a bite oil gas well generally will use different size, will use the bigger drill bit of diameter when boring upper formation, softer because of the stratum that drill bit creeps into, single footage per bit times many, that use are short, the general reusable several mouthfuls of wells of drill bit; And when boring the understratum, to use the less drill bit of diameter, drilling depth hard because of the stratum, single drill bit is few, generally will use many drill bits.The soft or hard on the size that how much depends primarily on drill bit of the green bit drill footage of going into the well, type, stratum and the cooperation of drilling parameter.In general, bit size is more little, the stratum is more hard, and drilling depth is more few; Bit size is more big, the stratum is more soft, and footage per bit is just more many.The broken rock effect of diamond bit is finished by diamond particles, know the broken rock effect of drill bit, just must understand the adamantine broken rock effect of simple grain.In firm hard formation, the simple grain diamond makes rock be in (about 4200-5700MPa, the data that has is thought can reach 6300MPa) under the high stress state under the pressure of the drill effect, and rock generation lithology is changed, and becomes plasticity by fragility.Simple grain diamond wedging stratum, the broken rock of cutting under torsional interaction, cutting depth is substantially equal to the depth of tooth penetration of diamond particles.This process is called the plough formula shear action of diamond bit as " plowing " event.In the bigger rock of some fragility (as sandstone, limestone etc.), under the diamond particles on the drill bit acted in the pressure of the drill moment of torsion, the volume of fractured rock was much larger than wedging and the rotary volume of diamond particles.When pressure is little, can only form minor groove along the adamantine direction of motion, intensified pressure then can make the catalase of minor groove deep and both sides, surpasses the cross dimensions of diamond particles.The rock breaking efficiency of diamond bit, outside the Pass having with lithology and the extraneous factor (as pressure, temperature, formation fluid property etc.) that influences lithology, the pressure of the drill size is the significant effects factor.It is the same with rock bit, all has top layer fragmentation, tired broken, three kinds of modes of volumetric fracture when breaking rock.Have only the diamond particles of working as to have enough specific pressure wedging formation rocks, when making rock generation volumetric fracture, just can obtain desirable rock breaking efficiency.
The present tooth-like diamond bit that generally uses, be to be looped around drill end (shape of the city wall city pier on similar Great Wall) by a circle dentation, produce the shear action of plough formula when rotating at a high speed, the shape of tooth is single, cutting force and durability are still good inadequately, timeliness is low, and poor to the different rock-layers adaptive faculty; Such as the weak abrasive layer of hard and compact, drill bit skids easily in drilling process, and the easy bit freezing of coal dust in small, broken bits yields poor results.
Summary of the invention
It is good to the purpose of this invention is to provide a kind of cutting force and durability, timeliness height, not bit freezing, and the big sawtooth diamond bit good to weak abrasive layer adaptive faculty.
The present invention is achieved in that big sawtooth diamond bit, comprises body and bores tooth, and it is characterized in that described brill tooth is polygon convex shape zigzag, the top is provided with the inclined-plane, and annular array is in the body top.
Boring tooth is polygon (being equivalent to the zigzag that " protruding " adds a breach) at drill end, and annular array is connected to one with mode and the body of sintering.The brill tooth of this big zigzag fashion will produce bigger cutting force and frictional force.Reduce to carve and get rock labial surface area, big zigzag plays the effect of carbide alloy scraping rock simultaneously, being used for firm hard formation and weak abrasiveness soft formation creeps into, because weak abrasive layer quality is harder, the situation that occurs drill slipping in drilling process easily, bigger cutting force and frictional force be raising and operating efficiency and probing progress effectively.The easy bit freezing of rock dust of weak abrasiveness rock stratum in addition, and polygon is because many inclined-plane breach, bath simultaneously in drilling process washes away rock dust easily, avoids bit freezing; Because be to bore tooth and the sintering integrated formula of this employing, the good life-span of durability is long.
In sum, the present invention produces bigger cutting force and frictional force because the brill tooth is polygon at drill end, be that a kind of cutting force and durability are good, the timeliness height, the not bit freezing of being convenient to wash by water, and the big sawtooth diamond bit good to weak abrasive layer adaptive faculty.
Description of drawings
Fig. 1 is the side schematic view of the embodiment of the invention;
Fig. 2 is the schematic top plan view of the embodiment of the invention;
Among the figure: 1, body; 2, bore tooth; 3, the inclined-plane.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
In Fig. 1 and 2, the present invention includes body 1 and bore tooth 2, described brill tooth 2 is polygon convex shape zigzag, and the top is provided with inclined-plane 3, and annular array is in body 1 top.
Claims (1)
1. big sawtooth diamond bit comprises body and bores tooth, and it is characterized in that described brill tooth is polygon convex shape zigzag, the top is provided with the inclined-plane, and annular array is in the body top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105042904A CN103184833A (en) | 2012-11-29 | 2012-11-29 | Diamond bit with large saw-teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105042904A CN103184833A (en) | 2012-11-29 | 2012-11-29 | Diamond bit with large saw-teeth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103184833A true CN103184833A (en) | 2013-07-03 |
Family
ID=48676255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105042904A Pending CN103184833A (en) | 2012-11-29 | 2012-11-29 | Diamond bit with large saw-teeth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103184833A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510861A (en) * | 2013-10-09 | 2014-01-15 | 无锡中地地质装备有限公司 | Stepped drill bit for exploration drilling |
| CN104131783A (en) * | 2014-08-18 | 2014-11-05 | 中国地质大学（武汉） | Diamond bit with wedge-shaped matrix crown contours |
| CN105386726A (en) * | 2015-10-27 | 2016-03-09 | 中国石油大学(华东) | Novel stratum rock core sampling drill preventing rock core from fracturing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246977A (en) * | 1979-04-09 | 1981-01-27 | Smith International, Inc. | Diamond studded insert drag bit with strategically located hydraulic passages for mud motors |
| CN1091077A (en) * | 1992-12-16 | 1994-08-24 | 希尔蒂股份公司 | Hollow boring bit with face cutting edge |
| CN2413823Y (en) * | 2000-02-02 | 2001-01-10 | 曾贵森 | Improved cutter for drill |
| CN2463091Y (en) * | 2001-04-28 | 2001-12-05 | 倪志福 | Multi-tip and edge group drill |
| CN202152638U (en) * | 2011-08-01 | 2012-02-29 | 中矿资源勘探股份有限公司 | Diamond drill bit with trapezoid matrix |
| CN202157753U (en) * | 2011-08-01 | 2012-03-07 | 中矿资源勘探股份有限公司 | Diamond bit with concave-convex labial surfaces |
-
2012
- 2012-11-29 CN CN2012105042904A patent/CN103184833A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246977A (en) * | 1979-04-09 | 1981-01-27 | Smith International, Inc. | Diamond studded insert drag bit with strategically located hydraulic passages for mud motors |
| CN1091077A (en) * | 1992-12-16 | 1994-08-24 | 希尔蒂股份公司 | Hollow boring bit with face cutting edge |
| CN2413823Y (en) * | 2000-02-02 | 2001-01-10 | 曾贵森 | Improved cutter for drill |
| CN2463091Y (en) * | 2001-04-28 | 2001-12-05 | 倪志福 | Multi-tip and edge group drill |
| CN202152638U (en) * | 2011-08-01 | 2012-02-29 | 中矿资源勘探股份有限公司 | Diamond drill bit with trapezoid matrix |
| CN202157753U (en) * | 2011-08-01 | 2012-03-07 | 中矿资源勘探股份有限公司 | Diamond bit with concave-convex labial surfaces |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510861A (en) * | 2013-10-09 | 2014-01-15 | 无锡中地地质装备有限公司 | Stepped drill bit for exploration drilling |
| CN104131783A (en) * | 2014-08-18 | 2014-11-05 | 中国地质大学（武汉） | Diamond bit with wedge-shaped matrix crown contours |
| CN104131783B (en) * | 2014-08-18 | 2016-06-15 | 中国地质大学（武汉） | A kind of carcass lip face is the diamond head of wedge shape |
| CN105386726A (en) * | 2015-10-27 | 2016-03-09 | 中国石油大学(华东) | Novel stratum rock core sampling drill preventing rock core from fracturing |
| CN105386726B (en) * | 2015-10-27 | 2017-11-07 | 中国石油大学(华东) | A kind of new stratum core sampling drill bit for preventing core to be broken |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130703 |