CN104879065B - PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling - Google Patents
PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling Download PDFInfo
- Publication number
- CN104879065B CN104879065B CN201510331198.6A CN201510331198A CN104879065B CN 104879065 B CN104879065 B CN 104879065B CN 201510331198 A CN201510331198 A CN 201510331198A CN 104879065 B CN104879065 B CN 104879065B
- Authority
- CN
- China
- Prior art keywords
- wing
- pdc
- bit
- seat
- bit body
- 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.)
- Active
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The invention relates to a PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling. The PDC bit comprises a bit body, blades and nozzles, wherein the blades and the nozzles are arranged on the bit body; each blade adopts a single-blade double-row profile structure; the rotation direction of the bit body is set to be forward; each blade is arranged at the profile of the bit body and comprises a front-row blade and a back-row blade, the part, located on the upper end surface of the bit body, of the front-row blade and the corner where the front-row blade extends to an outer ring of the bit body are taken as the upper part of the front-row blade, conical PDC cutting teeth are mounted at the upper part of the front-row blade, PDC cutting teeth are mounted at the lower part of the front-row blade and on the back-row blade, the ends of the conical PDC cutting teeth are upwards, and the ends of the PDC cutting teeth on the back-row blade face the front-row blade. The PDC bit suitable for gravel formation drilling adopts the single-blade double-row cutting structure, so that the cutting efficiency is higher, stress is more uniform and symmetric, and the integral service life of the bit is prolonged.
Description
Technical field
The present invention relates to well dynamic technical field of tools, more particularly to a kind of PDC drill bit for being adapted to the drilling of stratum containing gravel.
Background technology
PDC drill bit has higher rate of penetration, longer service life, is adapted to the soft hard homogeneous formation in of drilling,
Worldwide it is widely used, existing oneself becomes the most drill bit of onsite application.But PDC drill bit is to formation condition
Sensitiveness is strong, and when creeping on conglomerate stratum, cutting tooth is easily collapsed tooth and lose cutting energy by larger shock loading
Power, causes that footage per bit is low can not effectively to drill conglomerate interval, conventional PDC drill bit even creep into several meters be just damaged and must not
PDC drill bit is not played out.In scene application at present, bore the chance stratum and typically first drill top sandstone formation, Ran Houhuan with PDC drill bit
Conglomerate interval is drilled into rock bit, then gains PDC drill bit and continue to bore stratum below conglomerate, frequently made a trip and seriously increased
Drilling time, and rock bit drilling efficiency is low and antiwear property is poor, and the low drilling time of the drilling efficiency in conglomerate is long,
Considerably increase drilling cost.
For a long time, Chinese scholars have carried out positive exploration in terms of PDC drill bit, it is proposed that many improved methods.
For example optimize corona shape；Using multiple cloth toothing；Increase anti-whirling motion design；The aspects such as development of new composite sheet material are improved
The service behaviour of drill bit, increases the service life.
Development of these methods to PDC drill bit technology serves positive impetus, but all can not fundamentally solve
Problem of the PDC drill bit to the ground adaptability.Therefore, traditional thinking mode is broken through, drill bit parameters are entered from new angle
Row research, develops the needs that a kind of composite drill bit for being adapted to the drilling of stratum containing gravel is bit technique development, is whole at present boring
The needs of well technical system, are the needs for improving drilling well overall economic efficiency.
The content of the invention
The technical problem to be solved in the present invention is：In order in prior art PDC drill bit in drilling containing gravel and during gravel stratum,
" bit bouncing " " bouncing of drilling tool " is susceptible to, causes composite sheet avalanche to affect the problem of drilling life of bit, the present invention to provide a kind of being adapted to
The PDC drill bit of the drilling of stratum containing gravel.
The technical solution adopted for the present invention to solve the technical problems is：A kind of PDC drill bit for being adapted to the drilling of stratum containing gravel,
Including bit body and the wing being arranged on bit body and nozzle, the wing adopts the double crown configurations of the hilted broadsword wing, if
The direction of rotation for determining bit body is front, and the wing is arranged on the bizet of bit body, including front-seat wing and heel row wing, institute
Front-seat wing is stated positioned at the part of bit body upper surface and to the top that the corner of bit body outer ring extension is front-seat wing,
Then the top of front-seat wing is provided with taper PDC cutting tooths, and the bottom of the front-seat wing is provided with PDC cutting tooths, it is described after
PDC cutting tooths are installed, upward, the PDC on heel row wing cuts tooth ends court to the taper PDC cuttings tooth ends on row's wing
To front-seat wing.The combination of the conventional PDC teeth of front-seat taper PDC teeth of the invention and heel row has given full play to " band is all the way "
Cutting characteristic, conventional PDC teeth compensate for the low shortcoming of taper PDC tooth stock-removing efficiencies, and taper PDC teeth compensate for conventional PDC teeth and exist
The shortcoming of the drilling shock resistance of stratum containing gravel effect difference.This crumbling method for a little arriving face meets the generally rule of modern mechanical processing
Rule, is the perfect adaptation of two kinds of tooth advantages.
Preferably, having the corresponding PDC cutting tooths of PDC cutting tooths upper conical with front-seat wing on the heel row wing.
The center of taper PDC cutting tooths and PDC cutting tooths on described each wing is distributed in concentric circles.Cone on the front-seat wing
Shape PDC cutting tooth is slightly above PDC cutting tooths on heel row wing.The routine on taper PDC teeth and heel row wing on front-seat wing
PDC teeth arranged in concentric circles using before and after, conventional PDC teeth are slightly below taper PDC teeth.The cutting of conical tooth belongs to a contact, conventional
The cutting of composite sheet belongs to linear contact lay, and tandem arrangement defines the way of contact of triangle, further increases drill bit
Stability of the drilling containing gravel stratum, protects drill bit.The number of teeth is increased compared with conventional bit, but because rear toothrow is less than front toothrow
And increased conical tooth belongs to a contact, overall ratio the pressure of the drill increases on the contrary, it is ensured that the rate of penetration of drill bit.
Preferably, forming little chip area between the front-seat wing and heel row wing, big row is formed between adjacent blades
Let out groove.The big chip area between little chip area and wing on wing provides good bottom-hole flow field environment for drill bit jointly.
Preferably, being evenly equipped with 4 wings on the bit body, described 4 wing middle left and rights, two wings are first pair
Wing, upper and lower two wings are second pair of wing.
Preferably, front end of the front-seat wing front end in first pair of wing than the heel row wing in first pair of wing
Near bit body center.
Preferably, before the front end of the front-seat wing in second pair of wing and the heel row wing in second pair of wing
End is substantially flush.
Preferably, the taper PDC cutting tooths inside is Hardmetal materials, outside is have diadust to sinter
Layer.Taper PDC cutting tooths are one layer of diadusts of sintering on taper Hardmetal materials, fully combine two masters instantly
The advantage of stream drill bit (rock bit and PDC drill bit), with good impact resistance and abrasiveness.
Preferably, the nozzle is 4, respectively between 4 wings.Four nozzle of small diameter are adopted on drill bit,
Four arrangement of nozzles are arranged between wing, using drilling fluid cross flow characteristic clear rock sufficiently cool to Qian Hou toothrow.It is little straight
Footpath nozzle increases bit pressuredrop, improves waterpower auxiliary rock ability, drill bit is protected, so as to improve drilling efficiency.
The invention has the beneficial effects as follows, the PDC drill bit for being adapted to the drilling of stratum containing gravel of the present invention is double using this hilted broadsword wing
The cutting structure of row, fully absorbs the impact energy of conversion drilling gravel layer generation and forms one using the shock resistance of conical tooth
Fixed volumetric fracture, simultaneous bit cuts a cone tank.For bulky grain gravel conical tooth is played by big
The fragmentation in advance for diminishing, it is normal so as to reduce heel row for the cement structure that little particle gravel conical tooth destroys gravel
Jump probability is suppressed in rule tooth cutting.Afterwards toothrow cuts on the basis of the cone tank for producing, and is become by original single-point stress cutting
Into the cutting of both sides stress, stock-removing efficiency is higher, is more uniformly stressed symmetrically, and diamond compact utilization rate is higher, so as to effective
Protection composite sheet, improve drill bit bulk life time.
Description of the drawings
With reference to the accompanying drawings and examples the present invention is further described.
Fig. 1 is the front view of the embodiment of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the dimensional structure diagram of the embodiment of the present invention.
In figure：1st, bit body, 2, wing, 21, front-seat wing, 22, heel row wing, 3, nozzle, 4, taper PDC cutting tooths,
5th, PDC cutting tooths, 6, little chip area, 7, big discharge launder.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are simplified schematic diagram, only with
The basic structure of the illustration explanation present invention, therefore it only shows the composition relevant with the present invention.
As Figure 1-3, it is embodiments of the invention, a kind of PDC drill bit for being adapted to the drilling of stratum containing gravel, including bit body
1 and the wing 2 that is arranged on bit body 1 and nozzle 3, wing 2 sets bit body 1 using the double crown configurations of the hilted broadsword wing
Direction of rotation be front, wing 2 is arranged on the bizet of bit body 1, including front-seat wing 21 and heel row wing 22, front-seat wing
21 be located at the upper surface of bit body 1 parts and to the outer ring of bit body 1 extend corners be front-seat wing 21 top, then before
The top of row's wing 21 is provided with taper PDC cutting tooths 4, and the inside of taper PDC cutting tooths 4 is Hardmetal materials, and outside is have
Diadust sinter layer, the bottom of front-seat wing 21 is provided with PDC cutting tooths 5, and PDC cutting tooths are provided with heel row wing 22
Upward, the end of PDC cutting tooths 5 on heel row wing 22 is towards front-seat wing 21 for the end of 5, taper PDC cutting tooth 4.
There is the corresponding PDC cutting tooths 5 of PDC cutting tooths upper conical with front-seat wing 21 4 on heel row wing 22.Each wing
The center of taper PDC cutting tooths 4 and PDC cutting tooths 5 on 2 is distributed in concentric circles.Taper PDC cutting tooths on front-seat wing 21
4 are slightly above PDC cutting tooths 5 on heel row wing 22.Little chip area 6, adjacent knife are formed between front-seat wing 21 and heel row wing 22
Big discharge launder 7 is formed between the wing 2.4 wings, 2,42 middle left and rights of wing, two wings 2 are evenly equipped with bit body 1 for first pair
Wing, upper and lower two wings 2 are second pair of wing.The front end of the front-seat wing 21 in first pair of wing is than in first pair of wing
The number of teeth of front end front-seat wing 21 in the center of bit body 1, first pair of wing of heel row wing 21 be less than heel row wing 21
The number of teeth.Substantially put down the front end of the heel row wing 21 in the front end of the front-seat wing 21 in second pair of wing and second pair of wing
Together.Nozzle 3 is 4, respectively between 4 wings 2.
The present embodiment is fully absorbed using the shock resistance of conical tooth and turned using the double cutting structure of this hilted broadsword wing
Change the impact energy of drilling gravel layer generation and form certain volumetric fracture, simultaneous bit cuts a taper
Groove.For bulky grain gravel conical tooth plays fragmentation in advance from large to small, for little particle gravel conical tooth is destroyed
The cement structure of gravel, so as to reduce heel row routine tooth cutting jump probability is suppressed.Afterwards toothrow produce cone tank base
Cut on plinth, both sides stress cutting become by original single-point stress cutting, stock-removing efficiency is higher, is more uniformly stressed symmetrically,
Diamond compact utilization rate is higher, so as to be effectively protected composite sheet, improves drill bit bulk life time.
With the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Entirely various change and modification can be carried out in the range of without departing from this invention technological thought.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (8)
1. a kind of PDC drill bit for being adapted to the drilling of stratum containing gravel, including bit body（1）And it is arranged on bit body（1）On wing
（2）And nozzle（3）, it is characterised in that：The wing（2）Using the double crown configurations of the hilted broadsword wing, bit body is set（1）Rotation
Turn direction for front, the wing（2）It is arranged on bit body（1）Bizet, including front-seat wing（21）With heel row wing（22）,
The front-seat wing（21）Positioned at bit body（1）The part of upper surface and to bit body（1）The corner that outer ring extends is front
Row's wing（21）Top, then front-seat wing（21）Top taper PDC cutting tooths are installed（4）, the front-seat wing（21）
Bottom PDC cutting tooths are installed（5）, the heel row wing（22）On PDC cutting tooths are installed（5）, the taper PDC cuttings
Tooth（4）End upward, heel row wing（22）On PDC cutting tooths（5）End is towards front-seat wing（21）, the heel row wing
（22）It is upper to have and front-seat wing（21）Upper conical PDC cutting tooths（4）Corresponding PDC cutting tooths（5）, each described wing（2）
On taper PDC cutting tooths（4）With PDC cutting tooths（5）Center in concentric circles be distributed.
2. the PDC drill bit that suitable stratum containing gravel as claimed in claim 1 is crept into, it is characterised in that：The front-seat wing（21）
On taper PDC cutting tooths（4）Slightly above heel row wing（22）Upper PDC cutting tooths（5）.
3. the PDC drill bit that suitable stratum containing gravel as claimed in claim 1 is crept into, it is characterised in that：The front-seat wing（21）
With heel row wing（22）Between form little chip area（6）, adjacent blades（2）Between form big discharge launder（7）.
4. the PDC drill bit that suitable stratum containing gravel as claimed in claim 1 is crept into, it is characterised in that：The bit body（1）It is upper equal
It is furnished with 4 wings（2）, 4 wings（2）Two wings of middle left and right（2）For first pair of wing, upper and lower two wings（2）
For second pair of wing.
5. the PDC drill bit that suitable stratum containing gravel as claimed in claim 4 is crept into, it is characterised in that：In first pair of wing
Front-seat wing（21）Front end than the heel row wing in first pair of wing（21）Front end near bit body（1）Center.
6. the PDC drill bit that suitable stratum containing gravel as claimed in claim 4 is crept into, it is characterised in that：In second pair of wing
Front-seat wing（21）Front end and second pair of wing in heel row wing（21）Front end be substantially flush.
7. the PDC drill bit that suitable stratum containing gravel as claimed in claim 1 is crept into, it is characterised in that：The taper PDC cutting tooths
（4）Inside is Hardmetal materials, and outside is have diadust sinter layer.
8. the PDC drill bit that suitable stratum containing gravel as claimed in claim 1 is crept into, it is characterised in that：The nozzle（3）For 4,
4 wings are located at respectively（2）Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331198.6A CN104879065B (en) | 2015-06-15 | 2015-06-15 | PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331198.6A CN104879065B (en) | 2015-06-15 | 2015-06-15 | PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104879065A CN104879065A (en) | 2015-09-02 |
| CN104879065B true CN104879065B (en) | 2017-04-26 |
Family
ID=53946716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510331198.6A Active CN104879065B (en) | 2015-06-15 | 2015-06-15 | PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104879065B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109424323A (en) * | 2017-08-31 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of orientation CDE drill bit suitable for ground consisting of hard rock |
| CN110159202A (en) * | 2018-02-10 | 2019-08-23 | 西南石油大学 | A kind of diamond bit with fixed buffer structure |
| CN110145242A (en) * | 2018-02-11 | 2019-08-20 | 中石化石油工程技术服务有限公司 | One kind having taper auxiliary cutting element PDC drill bit |
| CN108729445B (en) * | 2018-08-13 | 2023-12-19 | 广州君豪岩土工程有限公司 | Drill bit for breaking waste solid piles and method for breaking old solid piles and filling new piles |
| CN112696155A (en) * | 2019-10-22 | 2021-04-23 | 西南石油大学 | PDC drill bit with back row tooth water hole |
| CN112627738A (en) * | 2020-12-03 | 2021-04-09 | 武穴市明锐机械股份有限公司 | Drill bit with mud bag preventing function |
| CN112610159B (en) * | 2020-12-07 | 2022-05-13 | 中国石油大学(华东) | Stepped drill bit suitable for intelligent drilling of difficult-to-drill stratum and drilling method |
| CN113404436B (en) * | 2021-07-29 | 2022-08-09 | 东北石油大学 | Directional double-tooth self-balancing PDC drill bit suitable for soft and hard interlayer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204691684U (en) * | 2015-06-15 | 2015-10-07 | 泰州市宝锐石油设备制造有限公司 | Be applicable to the PDC drill bit crept into containing gravel stratum |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6634444B2 (en) * | 2002-01-30 | 2003-10-21 | Sandvik Rock Tools, Inc. | Drill bit for trenchless drilling |
| CN201193483Y (en) * | 2008-03-04 | 2009-02-11 | 中国石化集团胜利石油管理局钻井工艺研究院 | PDC drill with double-row cutting tooth |
| CN201334874Y (en) * | 2009-01-20 | 2009-10-28 | 四川川石金刚石钻头有限公司 | Diamond bit with double rows of teeth |
| CN204098789U (en) * | 2014-08-04 | 2015-01-14 | 成都迪普金刚石钻头有限责任公司 | A kind of PDC drill bit being applicable to plastic formation |
-
2015
- 2015-06-15 CN CN201510331198.6A patent/CN104879065B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204691684U (en) * | 2015-06-15 | 2015-10-07 | 泰州市宝锐石油设备制造有限公司 | Be applicable to the PDC drill bit crept into containing gravel stratum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104879065A (en) | 2015-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104879065B (en) | PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling | |
| CN107842317B (en) | Hard-rock boring punching composite drill bit | |
| WO2013029347A1 (en) | Composite bit with rotary cut rock-breaking function | |
| CN206016680U (en) | A kind of streamlined wing fast drilling drill bit of split | |
| CN204782784U (en) | Be applied to diamond bit of shale pneumatic drill well | |
| CN110359847A (en) | A kind of three concentric drill bits of gear wheel PDC | |
| CN211230253U (en) | Anti-balling drill bit with conical teeth | |
| CN109898998A (en) | A kind of spiral wing additional mechanical supercharging returns the secondary broken rock drill bit of row | |
| CN204691684U (en) | Be applicable to the PDC drill bit crept into containing gravel stratum | |
| CN110067516A (en) | A kind of quick washing-, which is scraped, cuts combined type broken rock PDC drill bit | |
| CN109184578A (en) | A kind of high energy bottom nozzle decompression speed-raising PDC drill bit | |
| CN107989554A (en) | A kind of particle impacting PDC drilling bits | |
| CN208122763U (en) | A kind of diameter changing drilling tool | |
| CN206845104U (en) | A kind of polycrystalline diamond compact bit of good heat dissipation effect | |
| CN104727752A (en) | Polycrystalline diamond composite tooth and manufacturing method thereof as well as drill bit | |
| CN207647471U (en) | A kind of particle punching drilling PDC drill bit | |
| CN204476288U (en) | A kind of anti-Gravel drill bit | |
| CN207470124U (en) | A kind of taper teeth drill bit suitable for the drilling of hard formation containing gravel | |
| CN107642335A (en) | Can in interbedding of soft and hard rocks rock fast drilling PDC drill bit | |
| CN214741114U (en) | PDC drill bit with cutting structure | |
| CN207598195U (en) | A kind of coring bit suitable for hard formation | |
| CN108612480A (en) | A kind of vortex pulse shock drill bit | |
| CN207348797U (en) | Can in interbedding of soft and hard rocks rock fast drilling PDC drill bit | |
| CN104499947B (en) | Gravel-resistant drill | |
| CN203463017U (en) | Diamond-impregnated bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |