CN108798529A - A kind of PDC drill bit suitable for stiff plastic stratum - Google Patents
A kind of PDC drill bit suitable for stiff plastic stratum Download PDFInfo
- Publication number
- CN108798529A CN108798529A CN201710294041.XA CN201710294041A CN108798529A CN 108798529 A CN108798529 A CN 108798529A CN 201710294041 A CN201710294041 A CN 201710294041A CN 108798529 A CN108798529 A CN 108798529A
- Authority
- CN
- China
- Prior art keywords
- tooth
- cutting tooth
- diamond
- drill bit
- pdc drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010432 diamond Substances 0.000 claims abstract description 29
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 28
- 239000002131 composite material Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 9
- 230000035515 penetration Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000036346 tooth eruption Effects 0.000 abstract 1
- 210000000515 tooth Anatomy 0.000 description 33
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to oil and geological drilling diamond bit, specifically a kind of PDC drill bit suitable for stiff plastic stratum.It is formed including bit body, wing, nozzle, cutting tooth and tooth support.Cutting tooth is a kind of plow formula cutting tooth, and tooth support is installed after cutting tooth, and tooth support is less than 0~9mm of cutting tooth.The present invention is identical as conventional PDC drill bit application method, when cutting tooth and rock contact, the tip of plow formula cutting tooth can effectively wedging stratum, movement makes the structure of rock destroy before cutting teeth directional under the twisting force that drilling tool transmits, landwaste leaves stratum and is moved up along cutting tooth surface and then taken from shaft bottom by drilling fluid, to improve rate of penetration；The depth of tooth penetration that tooth support can control cutting tooth prevents wedging is too deep from damaging, and extends bit life and improves drilling depth.
Description
Technical field
The present invention relates to diamond bit used in oil and geological drilling, specifically a kind of PDC suitable for stiff plastic stratum
Drill bit.
Background technology
With the continuous development of diamond techniques, PDC drill bit to the speed-raising of petroleum geology drilling well carry effect play it is increasingly heavier
The effect wanted, drilling depth and rate of penetration are being continuously improved in sandstone formation, however are deposited in the stiff plastic stratum based on mud stone
Can not wedging rock the problem of, drill bit goes out after well usually phenomenon without abrasion without drilling depth.It must not be changed without bite type, but
Rock bit drilling depth is few, and there are the risks of lost cone, and diamond-impregnated bit is of high cost, and rate of penetration is slow.
Invention content
In view of the deficiencies of the prior art, the present invention provides it is a kind of stiff plastic stratum can effectively wedging stratum be suitable for it is hard
The PDC drill bit of plastic formation extends footage per bit to improve the bit speed in stiff plastic stratum, reduces drilling cost.
The technical scheme is that realized by following measures：
A kind of PDC drill bit suitable for stiff plastic stratum, including bit body, wing, nozzle and cutting tooth, cutting tooth is by hard alloy
Column is formed with diamond, wherein：It further include the tooth support after being fixed on cutting tooth；The cutting tooth is a kind of plow formula cutting tooth.
The tooth support ride out is less than 0~9mm of cutting tooth；The diamond is polycrystalline diamond.
The present invention plow formula cutting tooth technical solution include：
The first plow formula cutting tooth diamond surface is made of 2 faces.
The intersection in 2 faces is α with composite sheet cylindrical center axle clamp angle, and 2 face angles are β, the angle β is 90~
179 °, the angle α is 20~40 °.
The diamond outer surface of second of plow formula cutting tooth is by 3 or 3 to form above.
2 adjacent surface angles of the diamond are β, and the angle β is 90~179 °；2 phases of the polycrystalline diamond
The intersection of proximal surface is α with composite sheet cylindrical center axle clamp angle, and the angle α is 20~40 °.
For second of plow formula cutting tooth, the intersection of every 2 adjacent surfaces of the diamond outer surface is same tiltedly flat
On face, and keep being mutually parallel.
Or the intersection of every 2 adjacent surfaces of the diamond outer surface is on same tapered plane, and keep being mutually parallel.
The present invention the beneficial effects of the invention are as follows：In stiff plastic stratum can effectively wedging stratum, improve rate of penetration.
It is more had the following advantages especially with plow formula cutting tooth：Plow formula cutting tooth angle is contacted with formation rock to be conducive to eat
Enter stratum, the landwaste of plow broken rock, generation can leave shaft bottom in time along composite sheet surface.When work diamond outer surface with
Stratum is contacted without positive, only by lateral force, avoids composite sheet impact failure.
Description of the drawings
Fig. 1 is a kind of front view schematic diagram of stiff plastic stratum PDC drill bit of the present invention.
Fig. 2 is the top view illustration of Fig. 1.
Fig. 3 is a kind of front view of plow formula cutting tooth embodiment.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the front view of another plow formula cutting tooth embodiment.
In figure：1. bit body, 2. wings, 3. nozzles, 4. cutting tooths, 5. tooth supports, 4-1. diamonds, 4-2 hard alloy columnars.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1
As depicted in figs. 1 and 2, the present invention is made of bit body 1, wing 2, nozzle 3, cutting tooth 4 and tooth support 5, the equal radiuses of tooth support 5
It is arranged in 4 rear side of cutting tooth and proud exposure is less than cutting tooth 4 for 0~8mm.The cutting tooth is a kind of plow formula cutting tooth.
Embodiment 2
As shown in Figures 3 and 4, a kind of plow formula cutting tooth embodiment is made of diamond 4-1, hard alloy columnar 4-2.Diamond 4-
1 surface is made of 2 faces a, b, and the intersection in the face a, b is α with cylindrical center's axle clamp angle of hard alloy columnar 4-2, and the faces a are pressed from both sides with the faces b
Angle is β, and the angle α is 20~40 °, and the angle β is 90~179 °.
Embodiment 3
With reference to Fig. 5, on the basis of embodiment 1, the surfaces diamond 4-1 are made of 4 faces, and 3 intersections and the hard in 4 faces close
Cylindrical center's axle clamp angle of principal column 2 is α, and adjacent 2 face angles are β, and the angle α is 20~40 °, and the angle β is
90~179 °.The intersection of every 2 adjacent surfaces in the embodiment keeps being mutually parallel not on same tapered plane.
Embodiment 4
On the basis of embodiment 2, the intersection of every 2 adjacent surfaces keeps being mutually parallel on same tapered plane.
The preferred polycrystalline diamond of diamond in above-described embodiment.
Operation principle：
The present invention is identical as conventional PDC drill bit application method, when cutting tooth 4 and rock contact, the tip of plow formula cutting tooth 4
Can effectively wedging stratum, drilling tool transmit twisting force under cutting tooth 4 forward movement so that the structure of rock is destroyed, rock
Bits leave stratum and are moved up along cutting tooth surface and then taken from shaft bottom by drilling fluid, to improve rate of penetration；Tooth support 5 can be controlled
The depth of tooth penetration of cutting tooth 4 processed prevents wedging is too deep from damaging, and extends bit life and improves drilling depth.
Claims (8)
1. a kind of PDC drill bit suitable for stiff plastic stratum, including bit body（1）, wing（2）, nozzle（3）And cutting tooth（4）, cut
Cut tooth（4）By hard alloy columnar（4-2）With diamond（4-1）Composition, it is characterised in that：Further include being fixed on cutting tooth（4）Afterwards
Tooth support（5）；The cutting tooth（4）For a kind of plow formula cutting tooth.
2. being suitable for the PDC drill bit of stiff plastic stratum as described in claim 1, it is characterised in that：The tooth support（5）Ride out
Less than cutting tooth（4）0~9mm；The diamond（4-1）For polycrystalline diamond.
3. a kind of PDC drill bit suitable for stiff plastic stratum as claimed in claim 1 or 2, it is characterised in that：The plow formula is cut
Cut the diamond of tooth（4-1）Outer surface is made of 2 faces.
4. a kind of PDC drill bit suitable for stiff plastic stratum as claimed in claim 3, it is characterised in that：The diamond（4-1）
2 face angles are β, and the angle β is 90~179 °；The diamond（4-1）The intersection in 2 faces and composite sheet cylindrical center
Axle clamp angle is α, and the angle α is 20~40 °.
5. a kind of PDC drill bit suitable for stiff plastic stratum as claimed in claim 1 or 2, it is characterised in that：The plow formula is cut
Cut the diamond outer surface of tooth（4-1）By 3 or 3 to form above.
6. a kind of PDC drill bit suitable for stiff plastic stratum as claimed in claim 5, it is characterised in that：The diamond（4-1）
2 adjacent surface angles are β, and the angle β is 90~179 °；The diamond（4-1）The intersection and composite sheet of 2 adjacent surfaces
Cylindrical center's axle clamp angle is α, and the angle α is 20~40 °.
7. such as a kind of PDC drill bit suitable for stiff plastic stratum described in claim 5 or 6, it is characterised in that：The diamond
（4-1）The intersection of every 2 adjacent surfaces of outer surface keeps being mutually parallel on same tapered plane.
8. such as a kind of PDC drill bit suitable for stiff plastic stratum described in claim 5 or 6, it is characterised in that：The glomerocryst Buddha's warrior attendant
Stone（4-1）The intersection of every 2 adjacent surfaces of outer surface keeps being mutually parallel not on same tapered plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294041.XA CN108798529A (en) | 2017-04-28 | 2017-04-28 | A kind of PDC drill bit suitable for stiff plastic stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294041.XA CN108798529A (en) | 2017-04-28 | 2017-04-28 | A kind of PDC drill bit suitable for stiff plastic stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108798529A true CN108798529A (en) | 2018-11-13 |
Family
ID=64070212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710294041.XA Pending CN108798529A (en) | 2017-04-28 | 2017-04-28 | A kind of PDC drill bit suitable for stiff plastic stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798529A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242221A (en) * | 2019-07-01 | 2019-09-17 | 林正富 | A kind of PDC drill bit of the width scope of application |
| CN113738285A (en) * | 2020-05-27 | 2021-12-03 | 中国石油天然气集团有限公司 | Composite sheet with cutting ridges and inclined cutting faces and PDC drill bit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872520A (en) * | 1987-01-16 | 1989-10-10 | Triton Engineering Services Company | Flat bottom drilling bit with polycrystalline cutters |
| EP0527506A2 (en) * | 1991-08-14 | 1993-02-17 | Smith International, Inc. | Tungsten carbide inserts for rock bits |
| GB2294069A (en) * | 1994-10-15 | 1996-04-17 | Camco Drilling Group Ltd | Rotary drill bits |
| CN201013245Y (en) * | 2007-03-15 | 2008-01-30 | 中国石化集团胜利石油管理局钻井工艺研究院 | PDC drilling bit inserted with knifing control element |
| CA2690519A1 (en) * | 2009-05-26 | 2010-11-26 | Peter L. Pop | Ploughing wedge insert for drag drill bit |
| CN203452651U (en) * | 2013-08-26 | 2014-02-26 | 成都中腾石油工程技术有限公司 | Strong cone PDC (Polycrystalline Diamond Compact) vibration reduction acceleration drill bit |
| CN106460465A (en) * | 2014-03-11 | 2017-02-22 | 史密斯国际有限公司 | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements |
| CN206987739U (en) * | 2017-04-28 | 2018-02-09 | 中石化石油工程技术服务有限公司 | A kind of PDC drill bit suitable for stiff plastic stratum |
-
2017
- 2017-04-28 CN CN201710294041.XA patent/CN108798529A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872520A (en) * | 1987-01-16 | 1989-10-10 | Triton Engineering Services Company | Flat bottom drilling bit with polycrystalline cutters |
| EP0527506A2 (en) * | 1991-08-14 | 1993-02-17 | Smith International, Inc. | Tungsten carbide inserts for rock bits |
| GB2294069A (en) * | 1994-10-15 | 1996-04-17 | Camco Drilling Group Ltd | Rotary drill bits |
| CN201013245Y (en) * | 2007-03-15 | 2008-01-30 | 中国石化集团胜利石油管理局钻井工艺研究院 | PDC drilling bit inserted with knifing control element |
| CA2690519A1 (en) * | 2009-05-26 | 2010-11-26 | Peter L. Pop | Ploughing wedge insert for drag drill bit |
| CN203452651U (en) * | 2013-08-26 | 2014-02-26 | 成都中腾石油工程技术有限公司 | Strong cone PDC (Polycrystalline Diamond Compact) vibration reduction acceleration drill bit |
| CN106460465A (en) * | 2014-03-11 | 2017-02-22 | 史密斯国际有限公司 | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements |
| CN206987739U (en) * | 2017-04-28 | 2018-02-09 | 中石化石油工程技术服务有限公司 | A kind of PDC drill bit suitable for stiff plastic stratum |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242221A (en) * | 2019-07-01 | 2019-09-17 | 林正富 | A kind of PDC drill bit of the width scope of application |
| CN110242221B (en) * | 2019-07-01 | 2022-02-18 | 林正富 | PDC drill bit with wide application range |
| CN113738285A (en) * | 2020-05-27 | 2021-12-03 | 中国石油天然气集团有限公司 | Composite sheet with cutting ridges and inclined cutting faces and PDC drill bit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |