CN104879065A - PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling - Google Patents
PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling Download PDFInfo
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- CN104879065A CN104879065A CN201510331198.6A CN201510331198A CN104879065A CN 104879065 A CN104879065 A CN 104879065A CN 201510331198 A CN201510331198 A CN 201510331198A CN 104879065 A CN104879065 A CN 104879065A
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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, particularly relate to a kind of PDC drill bit being applicable to creeping into containing gravel stratum.
Background technology
PDC drill bit has higher rate of penetration, longer application life, be applicable to creeping into soft in hard homogeneous formation, be worldwide widely used, existing oneself becomes the maximum drill bit of onsite application.But PDC drill bit formation condition responsive is strong, when creeping on conglomerate stratum, cutting teeth is easily subject to larger shock loading and collapses tooth and lose cutting power, cause that footage per bit is low can not effectively drill conglomerate interval, conventional PDC drill bit even creeps into several meters and is just damaged and has to trip out PDC drill bit.In the application of current scene, bore this stratum of chance and generally first put on portion's sandstone formation by PDC bit drills, then change rock bit into and drill conglomerate interval, gain PDC drill bit again to continue to bore conglomerate with sub-surface, make a trip frequently and seriously add drilling time, and rock bit drilling efficiency is low and antiwear property is poor, the low drilling time of the drilling efficiency in conglomerate is long, considerably increases drilling cost.
For a long time, Chinese scholars has carried out positive exploration in PDC drill bit, proposes and much improves one's methods.Such as optimize corona shape; Adopt multiple cloth toothing; Increase anti-whirling motion design; The aspects such as development of new composite sheet material improve the service behaviour of drill bit, increase the service life.
The development of these methods to PDC bit technique serves positive impetus, but all fundamentally can not solve the problem of PDC drill bit to this ground adaptability.Therefore, break through traditional thinking mode, from new angle, drill bit parameters is studied, develop the needs that a kind of composite drill bit being applicable to creeping into containing gravel stratum is bit technique development, being the needs of current whole drilling technology system, is the needs improving drilling well overall economic efficiency.
Summary of the invention
The technical problem to be solved in the present invention is: in order to PDC drill bit in prior art is when creeping into containing gravel and gravel stratum, easy generation " bit bouncing " " bouncing of drilling tool ", cause composite sheet avalanche to affect the problem of drilling life of bit, the invention provides a kind of PDC drill bit being applicable to creeping into containing gravel stratum.
The technical solution adopted for the present invention to solve the technical problems is: a kind of PDC drill bit being applicable to creeping into containing gravel stratum, the wing comprising bit body and be arranged on bit body and nozzle, the crown configurations that described wing adopts the hilted broadsword wing double, the direction of rotation of setting bit body is front, described wing is arranged on the bizet of bit body, comprise front-seat wing and rear row's wing, the part that described front-seat wing is positioned at bit body upper surface and the corner extended to bit body outer ring are the top of front-seat wing, then the top of front-seat wing is provided with taper PDC cutting teeth, the bottom of described front-seat wing is provided with PDC cutting teeth, described rear row's wing is provided with PDC cutting teeth, described taper PDC cutting teeth end upward, PDC cutting teeth end on rear row's wing is towards front-seat wing.The combination of the taper PDC tooth at front row of the present invention and the conventional PDC tooth of rear row has given full play to the cutting characteristic of " is with a road ", conventional PDC tooth compensate for the low shortcoming of taper PDC tooth stock-removing efficiency, and taper PDC tooth compensate for conventional PDC tooth in the shortcoming of creeping into shock resistance weak effect containing gravel stratum.This crumbling method a little arriving face meets the universal law of modern mechanical processing, is the perfect adaptation of two kinds of tooth advantages.
As preferably, described rear row's wing have the PDC cutting teeth corresponding with front-seat wing upper conical PDC cutting teeth.Taper PDC cutting teeth on described each wing and the center of PDC cutting teeth are concentric circles distribution.Taper PDC cutting teeth on described front-seat wing is a little more than PDC cutting teeth on rear row's wing.Arranged in concentric circles before and after taper PDC tooth on front-seat wing and the conventional PDC tooth on rear row's wing adopt, conventional PDC tooth is a little less than taper PDC tooth.The cutting of conical tooth belongs to point cantact, and the cutting of conventional composite sheet belongs to linear contact lay, and tandem layout defines the leg-of-mutton way of contact, further increases drill bit and creeps into stability containing gravel stratum, protection drill bit.Add the number of teeth compared with conventional bit, but because rear toothrow is lower than front toothrow and the conical tooth increased belongs to point cantact, overall ratio the pressure of the drill increases on the contrary, ensure that the rate of penetration of drill bit.
As preferably, form little chip area between described front-seat wing and rear row's wing, between adjacent blades, form large discharge launder.Little chip area on wing and the large chip area between wing are jointly for drill bit provides good bottom-hole flow field environment.
As preferably, described bit body is evenly equipped with 4 wings, described 4 wing middle left and rights two wings are first pair of wing, and upper and lower two wings are second pair of wing.
As preferably, the front-seat wing front end in described first pair of wing than the front end of the rear row's wing in first pair of wing near bit body center.
As preferably, the front end of the front-seat wing in described second pair of wing is substantially concordant with the front end of the rear row's wing in second pair of wing.
As preferably, described taper PDC cutting teeth inside is Hardmetal materials, outside for there being diadust sinter layer.Taper PDC cutting teeth sinters one deck diadust on taper Hardmetal materials, fully combines the advantage of two main flow drill bits (rock bit and PDC drill bit) instantly, have good impact resistance and abrasiveness.
As preferably, described nozzle is 4, lays respectively between 4 wings.Drill bit adopts four nozzle of small diameter, and four arrangement of nozzles are arranged between wing, utilize drilling fluid cross flow characteristic fully to cool clear rock to front and back toothrow.Nozzle of small diameter increases bit pressuredrop, improves waterpower auxiliary rock ability, protection drill bit, thus improves drilling efficiency.
The invention has the beneficial effects as follows, the PDC drill bit being applicable to creeping into containing gravel stratum of the present invention, adopt the cutting structure that this hilted broadsword wing is double, utilize the abundant sorption enhanced of the shock resistance of conical tooth creep into the impact energy of layer of gravel generation and form certain volumetric fracture, simultaneous bit cuts a cone tank.Fragmentation in advance is from large to small played for bulky grain gravel conical tooth, granule gravel conical tooth is destroyed to the cement structure of gravel, thus reduce the conventional tooth of rear row and cut and suppress jumping probability.Rear toothrow cuts on the basis of the cone tank produced, and become the stressed cutting in both sides by the stressed cutting of original single-point, stock-removing efficiency is higher; symmetrically stressed; diamond compact utilization rate is higher, thus effectively protects composite sheet, improves drill bit bulk life time.
Accompanying drawing explanation
Below in conjunction with 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 perspective view of the embodiment of the present invention.
In figure: 1, bit body, 2, wing, 21, front-seat wing, 22, rear row's wing, 3, nozzle, 4, taper PDC cutting teeth, 5, PDC cutting teeth, 6, little chip area, 7, large discharge launder.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As Figure 1-3, embodiments of the invention, a kind of PDC drill bit being applicable to creeping into containing gravel stratum, the wing 2 comprising bit body 1 and be arranged on bit body 1 and nozzle 3, the crown configurations that wing 2 adopts the hilted broadsword wing double, the direction of rotation of setting bit body 1 is front, wing 2 is arranged on the bizet of bit body 1, comprise front-seat wing 21 and rear row's wing 22, the part that front-seat wing 21 is positioned at bit body 1 upper surface and the corner extended to bit body 1 outer ring are the top of front-seat wing 21, then the top of front-seat wing 21 is provided with taper PDC cutting teeth 4, taper PDC cutting teeth 4 inside is Hardmetal materials, outside for there being diadust sinter layer, the bottom of front-seat wing 21 is provided with PDC cutting teeth 5, rear row's wing 22 is provided with PDC cutting teeth 5, taper PDC cutting teeth 4 end upward, PDC cutting teeth 5 end on rear row's wing 22 is towards front-seat wing 21.
Rear row's wing 22 have the PDC cutting teeth 5 corresponding with front-seat wing 21 upper conical PDC cutting teeth 4.Taper PDC cutting teeth 4 on each wing 2 and the center of PDC cutting teeth 5 are concentric circles distribution.Taper PDC cutting teeth 4 on front-seat wing 21 is a little more than PDC cutting teeth 5 on rear row's wing 22.Form little chip area 6 between front-seat wing 21 and rear row's wing 22, between adjacent blades 2, form large discharge launder 7.Bit body 1 being evenly equipped with 4 wings, 2,4 wing 2 middle left and rights, two wings 2 is first pair of wing, and 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 the front end of the rear row's wing 21 in first pair of wing near bit body 1 center, and in first pair of wing, the number of teeth of front-seat wing 21 is less than the number of teeth of rear row's wing 21.The front end of the front-seat wing 21 in second pair of wing is substantially concordant with the front end of the rear row's wing 21 in second pair of wing.Nozzle 3 is 4, lays respectively between 4 wings 2.
The cutting structure that the present embodiment adopts this hilted broadsword wing double, utilize the abundant sorption enhanced of the shock resistance of conical tooth creep into the impact energy of layer of gravel generation and form certain volumetric fracture, simultaneous bit cuts a cone tank.Fragmentation in advance is from large to small played for bulky grain gravel conical tooth, granule gravel conical tooth is destroyed to the cement structure of gravel, thus reduce the conventional tooth of rear row and cut and suppress jumping probability.Rear toothrow cuts on the basis of the cone tank produced, and become the stressed cutting in both sides by the stressed cutting of original single-point, stock-removing efficiency is higher; symmetrically stressed; diamond compact utilization rate is higher, thus effectively protects composite sheet, improves drill bit bulk life time.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on manual, must determine its technical scope according to right.
Claims (10)
1. one kind is applicable to containing the PDC drill bit crept on gravel stratum, the wing (2) comprising bit body (1) and be arranged on bit body (1) and nozzle (3), it is characterized in that: the crown configurations that described wing (2) adopts the hilted broadsword wing double, the direction of rotation of setting bit body (1) is front, described wing (2) is arranged on the bizet of bit body (1), comprise front-seat wing (21) and rear row's wing (22), the part that described front-seat wing (21) is positioned at bit body (1) upper surface and the corner extended to bit body (1) outer ring are the top of front-seat wing (21), then the top of front-seat wing (21) is provided with taper PDC cutting teeth (4), the bottom of described front-seat wing (21) is provided with PDC cutting teeth (5), described rear row's wing (22) is provided with PDC cutting teeth (5), described taper PDC cutting teeth (4) end upward, PDC cutting teeth (5) end on rear row's wing (22) is towards front-seat wing (21).
2. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 1, is characterized in that: described rear row's wing (22) has the PDC cutting teeth (5) corresponding with front-seat wing (21) upper conical PDC cutting teeth (4).
3. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 2, is characterized in that: the taper PDC cutting teeth (4) on described each wing (2) and the center of PDC cutting teeth (5) are concentric circles distribution.
4. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 1, is characterized in that: the taper PDC cutting teeth (4) on described front-seat wing (21) is a little more than the upper PDC cutting teeth (5) of rear row's wing (22).
5. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 1, it is characterized in that: form little chip area (6) between described front-seat wing (21) and rear row's wing (22), between adjacent blades (2), form large discharge launder (7).
6. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 1, it is characterized in that: described bit body (1) is evenly equipped with 4 wings (2), described 4 wing (2) middle left and rights two wings (2) are first pair of wing, and upper and lower two wings (2) are second pair of wing.
7. the as claimed in claim 6 PDC drill bit being applicable to creeping into containing gravel stratum, is characterized in that: the front end of the front-seat wing (21) in described first pair of wing than the front end of the rear row's wing (21) in first pair of wing near bit body (1) center.
8. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 6, is characterized in that: the front end of the front-seat wing (21) in described second pair of wing is substantially concordant with the front end of the rear row's wing (21) in second pair of wing.
9. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 1, is characterized in that: described taper PDC cutting teeth (4) inside is Hardmetal materials, outside for there being diadust sinter layer.
10. the PDC drill bit being applicable to creeping into containing gravel stratum as claimed in claim 1, is characterized in that: described nozzle (3) is 4, lays respectively between 4 wings (2).
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 |
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| Publication Number | Publication Date |
|---|---|
| CN104879065A true CN104879065A (en) | 2015-09-02 |
| CN104879065B CN104879065B (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510331198.6A Active CN104879065B (en) | 2015-06-15 | 2015-06-15 | PDC (polycrystalline diamond compact) bit suitable for gravel formation drilling |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729445A (en) * | 2018-08-13 | 2018-11-02 | 中地君豪建筑工程有限公司 | The method for abolishing the drill bit of waste and old solid pile and abolishing old solid pile and new pile being perfused |
| 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 |
| 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 |
| CN110159202A (en) * | 2018-02-10 | 2019-08-23 | 西南石油大学 | A kind of diamond bit with fixed buffer structure |
| CN112610159A (en) * | 2020-12-07 | 2021-04-06 | 中国石油大学(华东) | Stepped drill bit suitable for intelligent drilling of difficult-to-drill stratum and drilling method |
| 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 |
| CN112696155A (en) * | 2019-10-22 | 2021-04-23 | 西南石油大学 | PDC drill bit with back row tooth water hole |
| WO2023005108A1 (en) * | 2021-07-29 | 2023-02-02 | 东北石油大学 | Directional double-tooth self-balancing pdc bit suitable for soft and hard interlayer |
| CN110159202B (en) * | 2018-02-10 | 2024-10-25 | 西南石油大学 | Diamond bit with fixed buffer structure |
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| DE10301617A1 (en) * | 2002-01-30 | 2003-07-31 | Sandvik Ab | Drill bit for trenchless drilling and method of making the drill bit |
| 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 |
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| 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 |
| 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 |
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2015
- 2015-06-15 CN CN201510331198.6A patent/CN104879065B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10301617A1 (en) * | 2002-01-30 | 2003-07-31 | Sandvik Ab | Drill bit for trenchless drilling and method of making the drill bit |
| 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 |
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Cited By (11)
| 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 |
| CN110159202B (en) * | 2018-02-10 | 2024-10-25 | 西南石油大学 | 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 |
| CN108729445A (en) * | 2018-08-13 | 2018-11-02 | 中地君豪建筑工程有限公司 | The method for abolishing the drill bit of waste and old solid pile and abolishing old solid pile and new pile being perfused |
| 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 |
| CN112610159A (en) * | 2020-12-07 | 2021-04-06 | 中国石油大学(华东) | Stepped drill bit suitable for intelligent drilling of difficult-to-drill stratum and drilling method |
| 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 |
| WO2023005108A1 (en) * | 2021-07-29 | 2023-02-02 | 东北石油大学 | Directional double-tooth self-balancing pdc bit suitable for soft and hard interlayer |
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| CN104879065B (en) | 2017-04-26 |
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