CN207160990U - A kind of pdc drill bits with asymmetric wing - Google Patents
A kind of pdc drill bits with asymmetric wing Download PDFInfo
- Publication number
- CN207160990U CN207160990U CN201721226207.6U CN201721226207U CN207160990U CN 207160990 U CN207160990 U CN 207160990U CN 201721226207 U CN201721226207 U CN 201721226207U CN 207160990 U CN207160990 U CN 207160990U
- Authority
- CN
- China
- Prior art keywords
- cutting
- wing
- gear
- tooth
- broken
- 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.)
- Expired - Fee Related
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 88
- 230000000875 corresponding Effects 0.000 claims description 7
- 239000011435 rock Substances 0.000 abstract description 30
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 210000000515 Tooth Anatomy 0.000 description 56
- 238000005553 drilling Methods 0.000 description 15
- 238000005457 optimization Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 230000000903 blocking Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Abstract
Pdc bit techniques field is the utility model is related to, discloses a kind of pdc drill bits with asymmetric wing, drill body includes cutting portion and connecting portion；Cutting portion is provided with central cutting device, and the height of central cutting device is higher than the height of cutting tooth；Central cutting device includes connecting rod and the topping machanism being arranged at the top of connecting rod, and topping machanism external diameter is more than connecting rod external diameter；Every wing side wall is evenly equipped with multigroup auxiliary cutting device, and auxiliary cutting device includes linkage gear and broken gear, and linkage gear and broken gear can rotate；The utility model central cutting device can improve efficiency of breaking rock, and can be convenient for changing；Connecting plate can make each nozzle fluid pressure identical, so that drill bit, during liquid is gone out, stress more balances；When sillar is stuck in channel of chip removal, broken gear band is dynamic with another the broken pinion rotation contacted in group with sillar, so that the sillar being stuck in channel of chip removal comes off, makes chip removal smooth, improves efficiency of breaking rock.
Description
Technical field
It the utility model is related to pdc bit techniques field, and in particular to a kind of pdc drill bits with asymmetric wing.
Background technology
At present, pdc drill bits, natural diamond bit, impregnated bit etc. are widely used in oil-gas mining and geological prospecting, and
Achieve prominent using effect.With continuing to increase for oil-gas mining difficulty, the exploitation of shale gas, extended reach well etc. is all more
Depend on directed-drilling technique, it is therefore desirable to have the directional drilling bit of suitable directional drilling.
Pdc drill bits are the abbreviations of polycrystalline diamond compact bit, and it is in the industries such as geological drilling and drilling engineering
One of most important rock crushing tool.The bizet section of pdc drill bits generally can be divided into：Interior conical point, inner conical surface, nose, shoulder,
Outer shoulder, gauge.Cutting tooth on pdc drill bits is arranged radially on the wing of drill bit along drill bit at an appropriate angle, cloth
The cutting tooth put on wing realizes broken rock by way of scraping and cutting or shear.
But existing pdc drill bits have the problem of efficiency of breaking rock is low in rock break-off process, and lead in sillar along chip removal
When road is discharged, often it is stuck in channel of chip removal, causes chip removal not smooth, influence the efficiency of breaking rock of drill bit.
Utility model content
Based on above technical problem, the utility model provides a kind of pdc drill bits with asymmetric wing, so as to solve
Existing pdc drill bits efficiency of breaking rock low technical problem.
The technical solution adopted in the utility model is as follows：
A kind of pdc drill bits with asymmetric wing, include the drill body of inner hollow, and drill body includes top
Cutting portion and the connecting portion of bottom；
5 wings are provided with the cutting portion crown outer surface, every wing has been evenly distributed in the upper surface multiple cutting tooths, phase
Channel of chip removal is formed between adjacent wing, cutting parts are provided with nozzle in channel of chip removal position；
The cutting portion is provided centrally with central cutting device, and the height of central cutting device is higher than the height of cutting tooth；
Central cutting device includes connecting rod and the topping machanism being arranged at the top of connecting rod, and topping machanism external diameter is more than outside connecting rod
Footpath；
Sleeve is vertically arranged with the middle part of the drill body, sleeve is coaxially disposed with drill body and runs through drill body；
Cartridge exterior circle distribution has 5 connecting plates, and connecting plate is connected with drill body inwall, and drill body inner chamber is divided into 5 goes out
Sap cavity, it is each described go out sap cavity is corresponding with nozzle and connection；The connecting rod is connected with bush whorl, and connecting rod is horizontally disposed to be had
Multiple connecting holes, sleeve correspondingly connect hole site and are provided with mounting hole, and bolt is each passed through connecting hole and mounting hole by connecting rod
Fixed with sleeve；
Every wing side wall is evenly equipped with multigroup auxiliary cutting device, and every group of auxiliary cutting device includes being arranged on wing
Internal linkage gear and the broken gear being partly embedded in respectively in two side walls of wing, linkage gear are broken by two in same group
Broken gear connection, linkage gear and broken gear can rotate；Multigroup auxiliary cutting device is uniform along the trend of wing
Set.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are：
1st, the central cutting device set in the middle part of the utility model can first destroy the stress distribution of rock stratum, make drilling more
Easily, and can be by the rock stratum in the middle part of the utility model to around being extruded on wing at the higher cutting tooth of rotating speed, so as to carry
High efficiency of breaking rock, improve rate of penetration；
2nd, because central cutting device contacts with rock stratum at first, so easily abrasion, the utility model central cutting device
It is flexibly connected with drill body, so as to be convenient for changing central cutting device, avoids central cutting device from being set with drill body
Set as one, situation about can not be changed after the abrasion of central cutting device；Central cutting device and the set being arranged in drill body
Cylinder not only can more be connected and more fastened, and can ensure central cutting device and drill bit sheet by bolt and threaded connection
The stability of body connection；
3rd, the connecting plate that the utility model is set not only can connect sleeve with drill body inwall, fixes sleeve, and
And by drill body inner chamber be divided into 5 it is independent go out sap cavity, make each nozzle fluid pressure identical, so that drill bit is going out liquid mistake
Cheng Zhong, stress more balance；In the case where going out sap cavity for entirety, wherein during some spray nozzle clogging, drilling fluid can be from
Other nozzles spray, and impact that the pressure for the nozzle that is blocked is small, and the utility model is set independently go out sap cavity be more beneficial for by
The nozzle of blocking is washed open；
4th, the broken gear that the utility model is set protrudes wing side wall and can rotated, and leads in sillar by chip removal
During road, the sliding friction between sillar and wing side wall is conjugated rolling friction, so as to reduce frictional force, sillar is not easy card
In channel of chip removal, so that drill bit, in rock break-off process, chip removal is smooth, operating efficiency is improved；
5th, due to forming channel of chip removal between adjacent wing, wing is separately positioned on two broken gears in group
Two side walls, so being contacted respectively with two channel of chip removal with two broken gears in group, and lead to the broken gear organized
Linkage gear linkage is crossed, so when sillar is stuck in a channel of chip removal, sillar and one in auxiliary cutting device are broken
Gear Contact, rotate under the impact of drilling fluid with another broken gear in group, contacted so as to drive with group with sillar
Another broken pinion rotation so that the sillar being stuck in channel of chip removal comes off, make channel of chip removal chip removal smooth, improve work
Make efficiency.
Preferably, the axis of the broken gear and linkage gear is parallel with wing side wall, crushes gear and connection
The axis of moving gear is vertical with wing upper surface, due to the finite thickness of wing, so such a set-up mode can need compared with
Few linkage gear can connects two broken gears in same group, simple in construction, cost-effective.
Preferably, the axis of the broken gear and linkage gear is parallel with wing side wall, crushes gear and connection
The axis of moving gear is parallel with wing upper surface, and broken gear can be contacted and rotated with rock stratum in drill bit rotation process,
Broken rock can not only be facilitated, and be stuck in channel of chip removal sillar when, it is bigger to crush the strength that gear provides, and leads to chip removal
The sillar that road is caught in faster drops.
Preferably, the linkage gear quantity is 1, is not only simple in structure, cost-effective, and in the knife of equivalent specifications
Under the wing, linkage gear is arranged to 1, and relative to be arranged to multiple situations with linkage gear, the size of linkage gear is bigger, so as to
Torque is become big, make the sillar of blocking be easier to drop.
Preferably, the central cutting device includes centrally disposed main centre tooth and centered on main centre tooth in circle
The sub-center tooth of week distribution, the height of main centre tooth are higher than the height of sub-center tooth, and sub-center tooth is anxious in can not only improving
The cutting diameter of turning device, ensure the stability of work, after main center odontotripsis central cutting device can also be made still may be used
To use.
Preferably, the sub-center tooth bottom is cylinder, and top is cone, and bottom, which is arranged to cylinder, to be ensured
The stability of sub-center tooth, sub-center tooth is avoided to damage, top is arranged to cone and is advantageous to improve efficiency of breaking rock.
Preferably, a diameter of 15-30mm of the main centre tooth.
Preferably, the difference in height between the main centre tooth and sub-center tooth is 3-10mm, is studied through inventor, main center
Difference in height between tooth and sub-center tooth is 3-10mm, can not only ensure efficiency of breaking rock, and main centre tooth can be avoided to roll over
It is disconnected.
Brief description of the drawings
Fig. 1 is the utility model totality connection diagram；
Fig. 2 is the utility model Figure 1A-A diagrammatic cross-sections；Linkage gear is arranged to 1；
Fig. 3 is the utility model Figure 1A-A diagrammatic cross-sections；Linkage gear is arranged to multiple；
Fig. 4 is enlarged drawing at the utility model Fig. 3 B；
Fig. 5 is the utility model central cutting schematic device；
Marked in figure：1- drill bodies；2- cutting portions；3- connecting portions；4- wings；5- cutting tooths；6- channel of chip removal；7- sprays
Mouth；8- central cutting devices；9- connecting rods；10- topping machanisms；11- sleeves；12- connecting plates；13- goes out sap cavity；14- auxiliary is cut
Turning device；15- linkage gears；16- crushes gear；The main centre tooths of 17-；18- sub-center teeth.
Embodiment
All features disclosed in this specification, can be with any in addition to mutually exclusive feature and/or step
Mode combines.
The utility model is elaborated below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of pdc drill bits with asymmetric wing, include the drill body 1 of inner hollow, drill bit sheet
Body 1 includes the cutting portion 2 on top and the connecting portion 3 of bottom；
5 wings 4 are provided with the crown outer surface of cutting portion 2, every wing 4 has been evenly distributed in the upper surface multiple cutting tooths
5, channel of chip removal 6 is formed between adjacent blades 4, cutting portion 2 is located at the position of channel of chip removal 6 and is provided with nozzle 7；
As shown in figure 5, the cutting portion 2 is provided centrally with central cutting device 8, the height of central cutting device 8 is higher than
The height of cutting tooth 5；Central cutting device 8 includes connecting rod 9 and is arranged on the topping machanism 10 at the top of connecting rod 9, cutting dress
Put 10 external diameters and be more than the external diameter of connecting rod 9；
As shown in Fig. 2 the middle part of drill body 1 is vertically arranged with sleeve 11, sleeve 11 is coaxially disposed with drill body 1
And run through drill body 1；5 connecting plates 12 are distributed with the exterior circumference of sleeve 11, and connecting plate 12 is connected with the inwall of drill body 1,
The inner chamber of drill body 1 is divided into 5 and goes out sap cavity 13, it is each described go out sap cavity 13 is corresponding with nozzle 7 and connection；The connecting rod 9
It is threadedly coupled with sleeve 11, connecting rod 9 is horizontally disposed there are multiple connecting holes, and the corresponding connection hole site of sleeve 11 is provided with installation
Hole, bolt are each passed through connecting hole and mounting hole and fix connecting rod 9 and sleeve 11；
As shown in Fig. 2 the side wall of every wing 4 is evenly equipped with multigroup auxiliary cutting device 14, every group of auxiliary cutting device
The 14 broken gears 16 including being arranged on the linkage gear 15 inside wing 4 and being partly embedded in respectively in 4 two side walls of wing, connection
Moving gear 15 connects two broken gears 16 in same group, and linkage gear 15 and broken gear 16 can rotate；It is described more
Trend of the group auxiliary cutting device 14 along wing 4 is uniformly arranged.
The axis of the broken gear 16 and linkage gear 15 is parallel with the side wall of wing 4, crushes gear 16 and connection
The axis of moving gear 15 is vertical with the upper surface of wing 4；The quantity of linkage gear 15 is 1.
The central cutting device 8 include centrally disposed main centre tooth 17 and centered on main centre tooth 17 circumferentially
The sub-center tooth 18 of distribution, the height of main centre tooth 17 are higher than the height of sub-center tooth 18；The bottom of sub-center tooth 18 is circle
Cylinder, top are cone；A diameter of 15-30mm of the main centre tooth 17；The main centre tooth 17 and sub-center tooth 18 it
Between difference in height be 3-10mm.
Operation principle of the present utility model is：Connecting portion 3 is connected with drill rod thread, during drilling, main centre tooth 17 is at first
Creep into rock stratum, destroy the stress distribution of rock stratum, and will it is broken after rock stratum be expressed to the higher sub-center tooth 18 of rotating speed of surrounding
At cutting tooth 5, sub-center tooth 18 and cutting tooth 5 will it is broken after rock stratum be further broken to landwaste, spray drilling well in nozzle 7
Landwaste after liquid will crush is discharged along channel of chip removal 6；
When needing to change central cutting device 8, drill body 1 is removed from drilling rod, connecting rod 9 and sleeve will be connected to
The bolt connected between 11 is pulled down, and pivot topping machanism 8 pulls down central cutting device 8 from drill body 1；And independently go out
Sap cavity 13 can make each fluid pressure of nozzle 7 identical, so that drill bit, during liquid is gone out, stress more balances, and solely
Sap cavity 13 is found out to be advantageous to wash open at blocked nozzle 7；
Because broken gear 16 protrudes the side wall of wing 4 and can rotate, in sillar when by channel of chip removal 6, make rock
Sliding friction displacement rolling friction between block and the side wall of wing 4, so as to reduce frictional force, sillar is set to be not easy to be stuck in chip removal and lead to
In road 6；
When sillar is stuck in wherein some channel of chip removal 6, sillar in the wing 4 of the blocked both sides of channel of chip removal 6 with setting
A broken gear 16 contact, now rotated with another broken gear 16 in group under the impact of drilling fluid, so as to band
Dynamic linkage gear 15 rotates, and linkage gear 15 drives the broken gear 16 contacted with sillar to rotate, so that being stuck in channel of chip removal 6
Interior sillar drops.
Below, the utility model is described in further details in conjunction with specific embodiments.
Specific embodiment
Embodiment 1
A kind of pdc drill bits with asymmetric wing, include the drill body 1 of inner hollow, and drill body 1 includes top
Cutting portion 2 and bottom connecting portion 3；
5 wings 4 are provided with the crown outer surface of cutting portion 2, every wing 4 has been evenly distributed in the upper surface multiple cutting tooths
5, channel of chip removal 6 is formed between adjacent blades 4, cutting portion 2 is located at the position of channel of chip removal 6 and is provided with nozzle 7；
The cutting portion 2 is provided centrally with central cutting device 8, and the height of central cutting device 8 is higher than the height of cutting tooth 5
Degree；Central cutting device 8 includes connecting rod 9 and is arranged on the topping machanism 10 at the top of connecting rod 9, and the external diameter of topping machanism 10 is more than
The external diameter of connecting rod 9；
The middle part of drill body 1 is vertically arranged with sleeve 11, and sleeve 11 is coaxially disposed with drill body 1 and runs through drill bit
Body 1；5 connecting plates 12 are distributed with the exterior circumference of sleeve 11, and connecting plate 12 is connected with the inwall of drill body 1, by drill body 1
Inner chamber is divided into 5 and goes out sap cavity 13, it is each described go out sap cavity 13 is corresponding with nozzle 7 and connection；The connecting rod 9 and the screw thread of sleeve 11
Connection, connecting rod 9 is horizontally disposed multiple connecting holes, and the corresponding connection hole site of sleeve 11 is provided with mounting hole, and bolt is worn respectively
Connecting hole and mounting hole is crossed to fix connecting rod 9 and sleeve 11；
The side wall of every wing 4 is evenly equipped with multigroup auxiliary cutting device 14, and every group of auxiliary cutting device 14 includes setting
Linkage gear 15 inside wing 4 and the broken gear 16 being partly embedded in respectively in 4 two side walls of wing, linkage gear 15 will
Connected with two broken gears 16 in group, linkage gear 15 and broken gear 16 can rotate；Multigroup assisted machining
Trend of the device 14 along wing 4 is uniformly arranged.
Embodiment 2
The present embodiment does further optimization, the axis of the broken gear 16 and linkage gear 15 based on embodiment 1
Parallel with the side wall of wing 4, the axis of broken gear 16 and linkage gear 15 is vertical with the upper surface of wing 4, due to wing 4
Finite thickness, so such a set-up mode can need the less can of linkage gear 15 by two broken gears in same group
16 connections, it is simple in construction, it is cost-effective.
Embodiment 3
The present embodiment does further optimization based on embodiment 1, as shown in Figure 3, Figure 4, the broken gear 16 and connection
The axis of moving gear 15 is parallel with the side wall of wing 4, and the axis of broken gear 16 and linkage gear 15 is put down with the upper surface of wing 4
OK.
The operation principle of the present embodiment：During drilling, cutting tooth 5 carries out broken rock to rock stratum, is arranged on the broken of the side wall of wing 4
Gear 16 is contacted and rotated with rock stratum, can help broken rock, and drilling fluid sprays from nozzle 7, makes broken sillar along chip removal
Passage 6 is discharged, and when sillar is stuck in wherein some channel of chip removal 6, sillar in the wing 4 of the blocked both sides of channel of chip removal 6 with setting
The broken gear 16 put is contacted, and broken gear 16 is contacted and rotated with rock stratum, sillar can be made to drop；
When sillar is blocked in the position that crushing gear 16 in the bottom of wing 4 can not contact with rock stratum, sillar and blocked chip removal
The broken gear 16 set in the wing 4 of the both sides of passage 6 contacts, now with another broken gear 16 in group in drilling well
Rotated under the impact of liquid, so as to drive linkage gear 15 to rotate, linkage gear 15 drives 16 turns of the broken gear contacted with sillar
It is dynamic, so that the sillar being stuck in channel of chip removal 6 drops.
Embodiment 4
The present embodiment does further optimization based on embodiment 2, and the quantity of linkage gear 15 is 1, is not only simple in structure,
It is cost-effective, and under the wing 4 of equivalent specifications, linkage gear 15 is arranged to 1, it is relative to be arranged to more with linkage gear 15
Individual situation, the size of linkage gear 15 is bigger, so that torque becomes big, makes the sillar of blocking be easier to drop.
Embodiment 5
The present embodiment does further optimization based on embodiment 1, and the central cutting device 8 is included in centrally disposed master
Heart tooth 17 and the sub-center tooth 18 being circumferentially distributed centered on main centre tooth 17, the height of main centre tooth 17 are higher than sub-center tooth
18 height, sub-center tooth 18 can not only improve the cutting diameter of central cutting device 8, ensure the stability of work, also may be used
After the abrasion of main centre tooth 17, to make central cutting device 8 still can use.
Embodiment 6
The present embodiment does further optimization based on embodiment 5, and the bottom of sub-center tooth 18 is cylinder, and top is circular cone
Body, bottom, which is arranged to cylinder, can ensure the stability of sub-center tooth 18, avoid sub-center tooth 18 from damaging, and top is arranged to round
Cone is advantageous to improve efficiency of breaking rock.
Embodiment 7
The present embodiment is further optimization, a diameter of 15-30mm of the main centre tooth 17 based on embodiment 5.
Embodiment 8
The present embodiment does further optimization, the height between the main centre tooth 17 and sub-center tooth 18 based on embodiment 5
Difference is 3-10mm, can not only ensure efficiency of breaking rock, and main centre tooth 17 can be avoided to fracture.
It is embodiment of the present utility model as described above.The utility model is not limited to above-mentioned embodiment, anyone
The structure change made under enlightenment of the present utility model should be learnt, it is every that there is same or like skill with the utility model
Art scheme, each falls within the scope of protection of the utility model.
Claims (8)
- A kind of 1. pdc drill bits with asymmetric wing, it is characterised in that：Drill body (1) including inner hollow, drill bit sheet Body (1) includes the cutting portion (2) on top and the connecting portion (3) of bottom；5 wings (4) are provided with cutting portion (2) crown outer surface, every wing (4) has been evenly distributed in the upper surface multiple cuttings Tooth (5), forms channel of chip removal (6) between adjacent blades (4), and cutting portion (2) is located at channel of chip removal (6) position and is provided with nozzle (7)；The cutting portion (2) is provided centrally with central cutting device (8), and the height of central cutting device (8) is higher than cutting tooth (5) Height；Central cutting device (8) includes connecting rod (9) and the topping machanism (10) being arranged at the top of connecting rod (9), cutting dress Put (10) external diameter and be more than connecting rod (9) external diameter；Sleeve (11) is vertically arranged with the middle part of the drill body (1), sleeve (11) is coaxially disposed and run through with drill body (1) Drill body (1)；5 connecting plates (12) are distributed with sleeve (11) exterior circumference, and connecting plate (12) connects with drill body (1) inwall Connect, drill body (1) inner chamber is divided into 5 goes out sap cavity (13), it is each described go out sap cavity (13) is corresponding with nozzle (7) and connection； The connecting rod (9) is threadedly coupled with sleeve (11), and connecting rod (9) is horizontally disposed multiple connecting holes, and sleeve (11) is corresponding to be connected Connect hole site and be provided with mounting hole, bolt is each passed through connecting hole and mounting hole, and connecting rod (9) and sleeve (11) is fixed；Every wing (4) side wall is evenly equipped with multigroup auxiliary cutting device (14), and every group of auxiliary cutting device (14) includes setting Put in the internal linkage gear (15) of wing (4) and the broken gear (16) being partly embedded in respectively in (4) two side walls of wing, connection Moving gear (15) connects two broken gears (16) in same group, and linkage gear (15) and broken gear (16) can turn It is dynamic；Trend of the multigroup auxiliary cutting device (14) along wing (4) is uniformly arranged.
- 2. the pdc drill bits according to claim 1 with asymmetric wing, it is characterised in that：The broken gear (16) It is parallel with wing (4) side wall with the axis of linkage gear (15), crush the axis of gear (16) and linkage gear (15) with Wing (4) upper surface is vertical.
- 3. the pdc drill bits according to claim 1 with asymmetric wing, it is characterised in that：The broken gear (16) It is parallel with wing (4) side wall with the axis of linkage gear (15), crush the axis of gear (16) and linkage gear (15) with Wing (4) upper surface is parallel.
- 4. the pdc drill bits according to claim 2 with asymmetric wing, it is characterised in that：The linkage gear (15) Quantity is 1.
- 5. the pdc drill bits according to claim 1 with asymmetric wing, it is characterised in that：The central cutting device (8) centrally disposed main centre tooth (17) and the sub-center tooth being circumferentially distributed centered on main centre tooth (17) are included (18), the height of main centre tooth (17) is higher than the height of sub-center tooth (18).
- 6. the pdc drill bits according to claim 5 with asymmetric wing, it is characterised in that：The sub-center tooth (18) Bottom is cylinder, and top is cone.
- 7. the pdc drill bits according to claim 5 with asymmetric wing, it is characterised in that：The main centre tooth (17) A diameter of 15-30mm.
- 8. the pdc drill bits according to claim 5 with asymmetric wing, it is characterised in that：The main centre tooth (17) Difference in height between sub-center tooth (18) is 3-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721226207.6U CN207160990U (en) | 2017-09-23 | 2017-09-23 | A kind of pdc drill bits with asymmetric wing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721226207.6U CN207160990U (en) | 2017-09-23 | 2017-09-23 | A kind of pdc drill bits with asymmetric wing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207160990U true CN207160990U (en) | 2018-03-30 |
Family
ID=61723633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721226207.6U Expired - Fee Related CN207160990U (en) | 2017-09-23 | 2017-09-23 | A kind of pdc drill bits with asymmetric wing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207160990U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610494A (en) * | 2018-11-30 | 2019-04-12 | 福建建中建设科技股份有限公司 | A kind of embedding rock construction technology of large-diameter pile foundation |
-
2017
- 2017-09-23 CN CN201721226207.6U patent/CN207160990U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610494A (en) * | 2018-11-30 | 2019-04-12 | 福建建中建设科技股份有限公司 | A kind of embedding rock construction technology of large-diameter pile foundation |
| CN109610494B (en) * | 2018-11-30 | 2021-07-16 | 福建建中建设科技有限责任公司 | Rock-socketed construction process for large-diameter pile foundation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207160989U (en) | A kind of pdc drill bits of high directionality | |
| CN107842317A (en) | Hard-rock boring punching composite drill bit | |
| CN202220556U (en) | Drill bit for particle impact drilling | |
| CN102434105A (en) | Composite bit with rotary cut rock-breaking function | |
| CN102392603B (en) | Compound bit formed by rotary cutting bit and PDC (polycrystalline diamond compact) blades | |
| CN109057715A (en) | A kind of compound PDC speed-raising drill bit cutting hardpan | |
| CN207160990U (en) | A kind of pdc drill bits with asymmetric wing | |
| CN208981966U (en) | Twin-stage drill bit | |
| CN105317377B (en) | Center differential pressure type drill bit | |
| CN106703728A (en) | Reciprocating rotating bidirectional replacement device | |
| CN109681122A (en) | A kind of two rank step scraper | |
| CN201614902U (en) | Post-fracturing rotary sand washing head | |
| CN104265178B (en) | Broad | |
| CN202073498U (en) | Chambering type pressure-reduction acceleration drill bit | |
| CN205778560U (en) | It is bit Integrated that centering type hydraulic bores expansion | |
| CN108756733A (en) | A kind of pulsatile impact broken rock drill bit | |
| CN106837229A (en) | Particle stream flow coring apparatus | |
| CN104131785A (en) | Single-cone PDC concentric RWD drill bit | |
| CN202441267U (en) | Combined drill bit having rock-breaking function through rotary cutting | |
| CN102287136A (en) | Hydraulic jetting drilling-well shower nozzle | |
| CN207160992U (en) | A kind of pdc drill bits of multiple rows of toothing | |
| CN104481433B (en) | Nearly drill bit is locally depressured short circuit | |
| CN208502674U (en) | A kind of two-way injection core bit of reduction chip hold down effect | |
| CN204082011U (en) | The concentric reaming while drilling drill bit of single cone PDC | |
| CN107842316A (en) | A kind of speed-raising drill bit of shaft bottom local reduction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 Termination date: 20190923 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |