CN109386236A - A kind of Customised corneal ablation formula tricone bit - Google Patents
A kind of Customised corneal ablation formula tricone bit Download PDFInfo
- Publication number
- CN109386236A CN109386236A CN201811202541.7A CN201811202541A CN109386236A CN 109386236 A CN109386236 A CN 109386236A CN 201811202541 A CN201811202541 A CN 201811202541A CN 109386236 A CN109386236 A CN 109386236A
- Authority
- CN
- China
- Prior art keywords
- gear wheel
- tooth
- bit
- group
- wheel group
- 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.)
- Granted
Links
- 238000002679 ablation Methods 0.000 title claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 47
- 239000004744 fabric Substances 0.000 claims abstract description 24
- 210000000515 tooth Anatomy 0.000 claims description 75
- 238000003860 storage Methods 0.000 claims description 22
- 230000004323 axial length Effects 0.000 claims description 4
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000001802 infusion Methods 0.000 claims description 2
- 210000003781 tooth socket Anatomy 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 27
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 9
- 241001074085 Scophthalmus aquosus Species 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000009987 spinning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- E21B10/08—Roller bits
- E21B10/12—Roller bits with discs cutters
-
- 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
- E21B10/08—Roller bits
- E21B10/086—Roller bits with excentric movement
-
- 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
- E21B10/08—Roller bits
- E21B10/16—Roller bits characterised by tooth form or arrangement
-
- 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
- E21B10/08—Roller bits
- E21B10/18—Roller bits characterised by conduits or nozzles for drilling fluids
-
- 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
- E21B10/08—Roller bits
- E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
- E21B10/24—Roller bits characterised by bearing, lubrication or sealing details characterised by lubricating details
-
- 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
- E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
- E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts
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 invention patent relates to a kind of Customised corneal ablation formula tricone bits, it scrapes the mechanism fractured rock for cutting rock using rotation cutting tooth, its personalized designs, which is embodied in the drill bit, can stablize the rock cutting of high speed, it is also ensured that drill bit is under the premise of continuous broken rock, cutting tooth is adequately cooled, and improves the service life of cutting tooth.Its technical solution is: the main body of the drill bit includes bit leg, three identical gear wheels and nozzle；Gear wheel is evenly arranged along the tangential direction of bit leg basic circle, and is connect by bearing with bit leg, and cutting tooth is the different cylin-drical tooth of both ends of the surface diameter, is arranged in gear wheel axis direction and is bordering on the gear wheel cloth flank of tooth at 5~10 degree of bit leg center partially；At work, work drive motor finally drives gear wheel to revolve along drill rod axis direction on well, and the axis direction rotation along bit leg journel；The rotation of gear wheel can make cutting tooth rotation work, reduce the time of contact with cutting tooth and rock.
Description
Technical field
The invention patent relates to a kind of for petroleum, the Customised corneal ablation formula tricone bit of gas drilling.
Background technique
In oil and gas industry, drilling well is essential link, is commonly to bore by drill bit fractured rock
One of well method, and common drill bit mainly includes rock bit and PDC drill bit.Rock bit at work, by gear wheel
The effect of tooth rolling impact achievees the purpose that fractured rock, but such withdrawal mechanism can be along with violent vibration, certain
The service life of drill bit can be reduced in degree.PDC drill bit is then to achieve the purpose that fractured rock by the shear action of tooth,
Compared to rock bit, PDC drill bit will not generate violent vibration, and the process of broken rock is more stable, but due to each PDC tooth
It can be carried out continuously cutwork, therefore can also reduce the service life of drill bit to a certain extent.
Based on the status that PDC drill bit instantly is not yet effectively combined with the operational advantages of rock bit, the design uses rotation
Cutting tooth, which is scraped, cuts the principle of rock and designs a kind of Customised corneal ablation formula tricone bit, and a kind of similar PDC is bored tooth by the drill bit
Cutting tooth is placed on gear wheel, and is revolved along drill rod axis direction using gear wheel, and along the form of own axes direction rotation
Operating.On the one hand, since gear wheel is arranged in bit body basic circle tangential direction, at work, the spinning motion meeting of gear wheel
It is limited by revolution motion, causes rotation revolving speed lower, so that the vibration of bit body is reduced, so that entire rock break-off process ratio
Compared with stabilization, reduce the probability that falls off of cutting tooth.On the other hand, the drill bit is compared to common PDC drill bit, gear wheel
Spinning motion can make scraping for cutting tooth rotation cut rock, to be fully cooled cutting tooth, improve the service life of cutting tooth.
Summary of the invention
The purpose of the invention patent is: in order to allow cutting tooth to be adequately cooled in drill bit body running, extending drill bit
The service life of body reduces the probability that cutting tooth falls off from gear wheel, therefore proposes a kind of Customised corneal ablation formula tricone bit.
In order to achieve the above objectives, the invention patent uses a kind of following technical scheme: Customised corneal ablation formula tricone bit
Mainly it is made of the first gear wheel group, the second gear wheel group, third gear wheel group, cutting tooth, bit leg, nozzle, runner；First gear wheel
Group includes the first gear wheel, bearing a, oil storage system a, gear wheel oil guiding hole a, bit leg oil guiding hole a；The second gear wheel group includes second
Gear wheel, bearing b, oil storage system b, gear wheel oil guiding hole b, bit leg oil guiding hole b；The third gear wheel group includes third gear wheel, bearing
C, oil storage system c, gear wheel oil guiding hole c, bit leg oil guiding hole c；The nozzle be arranged on bit body two pairs of gear wheel groups it
Between, nozzle tip is connect with bit body edge through-hole, is connect at the top of bottom end and runner, and runner is placed on inside bit body, spray
Mouth and runner constitute an infusion access, are machined with connection screw thread on the outer surface at bit body bottom end to 1/3 axial length, with
This jointed rod and bit body；The cloth flank of tooth of first gear wheel of the first gear wheel group includes the first ring cloth flank of tooth, the second ring cloth
The flank of tooth and the third ring cloth flank of tooth are disposed with cutting tooth, the big end end face of cutting tooth and each ring end in the tooth socket of each ring cloth flank of tooth
Face flushes, and the mounting height of the cutting tooth on each ring cloth flank of tooth is above anchor ring and identical；On bit body below first gear wheel
Gear wheel oil guiding hole a is offered, for the first gear wheel by connecting at bearing a and bit leg journel, oil storage system a is mounted on the back of bit leg
Bottom end, bit leg oil guiding hole a are provided with the back bottom end of bit leg, and connect and communicate with oil storage system a, gear wheel oil guiding hole a, oil storage system
The a and bit leg oil guiding hole a that unites forms an oil transportation access；Second gear wheel group, the composed structure of third gear wheel group, erection sequence and
One gear wheel group is identical.
The first gear wheel, the second gear wheel and third gear wheel in above scheme are evenly arranged on bit body basic circle, and each
Gear wheel is according to small end is placed in the posterior direction of preceding, big end along bit body revolution direction.
Folded by axis of the axis of the first gear wheel in the first gear wheel group in above scheme in main view plane with bit leg
Acute angle is 70 degree；Second gear wheel group, third gear wheel group also feature having the same.
The first ring cloth flank of tooth, the second ring cloth flank of tooth and the third ring of the first gear wheel in the first gear wheel group in above scheme
9,15,15 cutting tooths have been evenly arranged on the cloth flank of tooth respectively；Second gear wheel group, third gear wheel group also feature having the same.
The axis and bit body basic circle of the first gear wheel in the first gear wheel group in above scheme are tangent；Second gear wheel
Group, third gear wheel group also feature having the same.
The cutting tooth in the first gear wheel group in above scheme is both ends cylin-drical tooth of different sizes, wherein large end face with
The diameter ratio of small end face is 3:2, and small end face diameter and axial length ratio are 1:2；Second gear wheel group, third gear wheel group also have phase
Same feature.
The placement direction of the cutting tooth in the first gear wheel group in above scheme is that the first gear wheel axis direction is bordering on tooth partially
5~10 degree of palm center；Second gear wheel group, third gear wheel group also feature having the same.
The beneficial effect of the invention patent is:
(1) compared to common PDC drill bit, at work, the spinning motion of gear wheel can make brill gear change to the drill bit
Scrape and cut rock, be adequately cooled to allow and bore tooth, extend the service life for boring tooth.
(2) according to the rotation revolving speed of gear wheel when the corresponding diameter in the drill bit gear wheel cloth ring gear face and work, gear wheel
The first ring cloth flank of tooth, be evenly arranged 9,15,15 cutting tooths respectively on the second ring cloth flank of tooth and the third ring cloth flank of tooth, can be with
Guarantee in gear wheel rotation, brill tooth, which can be scraped continuously, cuts rock.
(3) according to the form of the brill tooth rock cutting of the drill bit, tooth big end end face and gear wheel cloth ring gear end face will be bored,
It can continuously be scraped with auxiliary drill tooth and cut rock；Tooth shaft line will be bored and be partial to bit leg center, and just with 5~10 degree of gear wheel axis angle
To placement, it is ensured that gear wheel is when along the rotation of bit body basic circle tangential direction, the working face of gear wheel and the working face for boring tooth
There are certain angles, to increase the effective contact area for boring tooth and rock, improve the efficiency of rock cutting.
(4) influence according to the contact angle of gear wheel when bit operation and rock to stock-removing efficiency, the axis of gear wheel is existed
The direction that the interior axis with bit leg of main view plane presss from both sides 70 degree of acute angle is placed, and be can be further improved brill tooth and is contacted with the effective of rock
Area.
(5) tooth is bored using a kind of cutting tooth of similar PDC brill tooth due to the drill bit, the connection with gear wheel is different from general
Logical rock bit, therefore the direction that the gear wheel axis of the drill bit is parallel to bit body basic circle tangent line is placed, it is public to increase gear wheel
Resistance when turning reduces the vibration that drill bit is generated in rotation to reduce the autorotation speed of gear wheel, plays reduction brill tooth and falls off
The effect of probability.
(6) oil storage system is used cooperatively with nozzle system, can timely be drained drilling cuttings, lubrication drill bit, compensating differential pressure, be mentioned
Height bores effective stock-removing efficiency of tooth, extends drilling life of bit.
Detailed description of the invention:
Fig. 1 is a kind of main view of the first gear wheel group of Customised corneal ablation formula tricone bit of the invention patent.
Fig. 2 is a kind of main view of the second gear wheel group of Customised corneal ablation formula tricone bit of the invention patent.
Fig. 3 is a kind of main view of the third gear wheel group of Customised corneal ablation formula tricone bit of the invention patent.
Fig. 4 is a kind of top view of Customised corneal ablation formula tricone bit of the invention patent.
In figure: 1. cutting tooths, 2. first gear wheels, 3. second gear wheels, 4. third gear wheels, 5. bearing a, 6. bearing b, 7. bearings
C, 8. oil storage system a, 9. oil storage system b, 10. oil storage system c, 11. oil guiding hole a, 12. oil guiding hole b, 13. oil guiding hole c, 14. teeth
The palm, 15. nozzles, 16. runners, 17. bit leg oil guiding hole a, 18. bit leg oil guiding hole b, 19. bit leg oil guiding hole c.
Specific embodiment:
The invention patent is described further with reference to the accompanying drawing:
The invention patent relates to a kind of Customised corneal ablation formula tricone bits, comprising: cutting tooth 1, the first gear wheel 2, second
Gear wheel 3, third gear wheel 4, bearing a 5, bearing b 6, bearing c 7, oil storage system a 8, oil storage system b 9, oil storage system c 10,
Oil guiding hole a 11, oil guiding hole b 12, oil guiding hole c 13, bit leg 14, nozzle 15, runner 16, bit leg oil guiding hole a 17, bit leg Oil Guide
Hole b 18, bit leg oil guiding hole c 19.According to shown in Fig. 1, bit body is connect with drilling rod, and be connected to power supply；First gear wheel 2,
Pass through bearing a 5, bearing b 6, bearing c 7 respectively at second gear wheel 3, third gear wheel 4 and 14 axle journal of bit leg to connect；It is working
When, the first gear wheel 2, the second gear wheel 3, third gear wheel 4 not only around bit body revolve, but also respectively at 14 axle journal of bit leg axis from
Turn, the revolution of the first gear wheel 2, the second gear wheel 3, third gear wheel 4 drives 1 rock cutting of cutting tooth, and rotation makes 1 interval of cutting tooth
Work is fully cooled cutting tooth 1 with this, extends the service life of cutting tooth 1；Oil storage system a 8, oil storage system b 9, oil storage system
The c 10 that unites is respectively the first gear wheel 2, the second gear wheel 3,4 fuel feeding of third gear wheel, reduces friction with this, reduces inside and outside differential pressure；Nozzle
15 eject drilling well base fluid by runner 16, then extra drilling cuttings is taken away by drilling well base fluid, to avoid 1 Repeated Cutting of cutting tooth
Drilling cuttings helps to improve the efficiency of the effective rock cutting of bit body.
Claims (7)
1. a kind of Customised corneal ablation formula tricone bit is mainly by the first gear wheel group, the second gear wheel group, third gear wheel group, cutting tooth
(1), bit leg (14), nozzle (15), runner (16) composition；The first gear wheel group includes the first gear wheel (2), bearing a (5), storage
Oil system a (8), gear wheel oil guiding hole a (11), bit leg oil guiding hole a (17)；The second gear wheel group includes the second gear wheel (3), bearing
B (6), oil storage system b (9), gear wheel oil guiding hole b (12), bit leg oil guiding hole b (18)；The third gear wheel group includes third gear wheel
(4), bearing c (7), oil storage system c (10), gear wheel oil guiding hole c (13), bit leg oil guiding hole c (19)；The nozzle (15) is respectively
It is arranged on bit body between two pairs of gear wheel groups, nozzle (15) top is connect with bit body edge through-hole, bottom end and runner
(16) top connection, runner (16) are placed on inside bit body, and nozzle (15) and runner (16) constitute an infusion access, drill bit
It is machined with connection screw thread on outer surface at body bottom end to 1/3 axial length, with this jointed rod and bit body；First tooth
The cloth flank of tooth of the first gear wheel (2) of wheel group includes the first ring cloth flank of tooth, the second ring cloth flank of tooth and the third ring cloth flank of tooth, in each ring cloth
It is disposed in the tooth socket of the flank of tooth cutting tooth (1), the big end end face of cutting tooth (1) and each ring end face, on each ring cloth flank of tooth
The mounting height of cutting tooth (1) is above anchor ring and identical；Gear wheel oil guiding hole is offered on bit body below first gear wheel (2)
A (11), for the first gear wheel (2) by connecting at bearing a (5) and bit leg (14) axle journal, oil storage system a (8) is mounted on bit leg (14)
Back bottom end, bit leg oil guiding hole a (17) is provided with the back bottom end of bit leg (14), and connect and communicate with oil storage system a (8),
Gear wheel oil guiding hole a (11), oil storage system a (8) and bit leg oil guiding hole a (17) form an oil transportation access；Second gear wheel group, third
The composed structure of gear wheel group, erection sequence are identical with the first gear wheel group.
2. a kind of Customised corneal ablation formula tricone bit according to claim 1, it is characterised in that: first gear wheel
(2), the second gear wheel (3) and third gear wheel (4) are evenly arranged on bit body basic circle, and each gear wheel is according to along bit body
Small end is placed in the posterior direction of preceding, big end on revolution direction.
3. a kind of Customised corneal ablation formula tricone bit according to claim 1, it is characterised in that: first gear wheel
The axis of the first gear wheel (2) in group is 70 degree with acute angle folded by the axis of bit leg (14) in main view plane；Second gear wheel group,
Third gear wheel group also feature having the same.
4. a kind of Customised corneal ablation formula tricone bit according to claim 1, it is characterised in that: first gear wheel
Be evenly arranged 9 on the first ring cloth flank of tooth of the first gear wheel (2) in group, the second ring cloth flank of tooth and the third ring cloth flank of tooth respectively,
15,15 cutting tooths (1)；Second gear wheel group, third gear wheel group also feature having the same.
5. a kind of Customised corneal ablation formula tricone bit according to claim 1, it is characterised in that: first gear wheel
The axis and bit body basic circle of the first gear wheel (2) in group are tangent；Second gear wheel group, third gear wheel group also spy having the same
Sign.
6. a kind of Customised corneal ablation formula tricone bit according to claim 1, it is characterised in that: first gear wheel
Cutting tooth (1) in group is the different cylin-drical tooth of both ends of the surface diameter, and wherein the diameter of large end face and small end face ratio is 3:
2, small end face diameter and axial length ratio are 1:2；Second gear wheel group, third gear wheel group also feature having the same.
7. a kind of Customised corneal ablation formula tricone bit according to claim 1, it is characterised in that: first gear wheel
The placement direction of cutting tooth (1) in group is that the first gear wheel (2) axis direction is bordering on 5~10 degree of bit leg (14) center partially；Second
Gear wheel group, third gear wheel group also feature having the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202541.7A CN109386236B (en) | 2018-10-16 | 2018-10-16 | Personalized cutting type tricone bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202541.7A CN109386236B (en) | 2018-10-16 | 2018-10-16 | Personalized cutting type tricone bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109386236A true CN109386236A (en) | 2019-02-26 |
| CN109386236B CN109386236B (en) | 2020-11-24 |
Family
ID=65427283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811202541.7A Active CN109386236B (en) | 2018-10-16 | 2018-10-16 | Personalized cutting type tricone bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109386236B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2038985A1 (en) * | 1970-08-05 | 1972-02-10 | Foraj Gaz Metan Medias De | Roller bit tooling - triple roller with studs pyramid studs and teeth for crater, ring and wedge-out action at high penetration rates |
| CN101806195A (en) * | 2010-03-09 | 2010-08-18 | 江汉石油钻头股份有限公司 | Tricone bit used for high-rotating speed well drilling |
| CN201802311U (en) * | 2010-03-09 | 2011-04-20 | 江汉石油钻头股份有限公司 | Tricone bit for drilling well at high rotating speed |
| CN203248078U (en) * | 2013-02-28 | 2013-10-23 | 西南石油大学 | Disc insert cone bit |
| CN105257217A (en) * | 2015-11-18 | 2016-01-20 | 西南石油大学 | Drill bit sealing structure with automatic circulation function |
| CN107905732A (en) * | 2017-12-18 | 2018-04-13 | 中国石油集团川庆钻探工程有限公司 | A kind of particle punching drilling tricone bit |
| CN108442886A (en) * | 2018-05-22 | 2018-08-24 | 西南石油大学 | Split type tricone bit |
-
2018
- 2018-10-16 CN CN201811202541.7A patent/CN109386236B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2038985A1 (en) * | 1970-08-05 | 1972-02-10 | Foraj Gaz Metan Medias De | Roller bit tooling - triple roller with studs pyramid studs and teeth for crater, ring and wedge-out action at high penetration rates |
| CN101806195A (en) * | 2010-03-09 | 2010-08-18 | 江汉石油钻头股份有限公司 | Tricone bit used for high-rotating speed well drilling |
| CN201802311U (en) * | 2010-03-09 | 2011-04-20 | 江汉石油钻头股份有限公司 | Tricone bit for drilling well at high rotating speed |
| CN203248078U (en) * | 2013-02-28 | 2013-10-23 | 西南石油大学 | Disc insert cone bit |
| CN105257217A (en) * | 2015-11-18 | 2016-01-20 | 西南石油大学 | Drill bit sealing structure with automatic circulation function |
| CN107905732A (en) * | 2017-12-18 | 2018-04-13 | 中国石油集团川庆钻探工程有限公司 | A kind of particle punching drilling tricone bit |
| CN108442886A (en) * | 2018-05-22 | 2018-08-24 | 西南石油大学 | Split type tricone bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109386236B (en) | 2020-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104234620B (en) | The method of rock borer, turnbarrel and lubrication | |
| CN207553972U (en) | A kind of combined cut diamond bit | |
| CN102003145B (en) | Hole driven type horizontal directional drilling reverse circulation hole dilating drill | |
| CN108756733A (en) | A kind of pulsatile impact broken rock drill bit | |
| US4154312A (en) | Drill bit with single cutting head | |
| CN105507809B (en) | Cut rock crushing tool in a kind of alternation track | |
| CN104314473B (en) | The PDC drill bit instrument of eccentric swing rotation can be achieved | |
| CN109386236A (en) | A kind of Customised corneal ablation formula tricone bit | |
| CN105545213A (en) | Combined drill comprising three blades, double composite teeth and three cone teeth | |
| CN212201955U (en) | Constant-speed rotating jet tool | |
| CN112901063A (en) | Injection-suction type drilling speed-increasing tool | |
| CN205532272U (en) | Broken rock instrument of reversal orbit cutting | |
| CN205349235U (en) | Combined drill of two composite tooth of three wings and tricone tooth | |
| CN115142797B (en) | Pdc drill bit for petroleum drilling and its usage | |
| CN214498914U (en) | Tool beneficial to reducing pressure supporting phenomenon of directional drilling | |
| US2763469A (en) | Rotary rock drills | |
| CN203022632U (en) | Six-cone reamer | |
| CN2285818Y (en) | Impact press-in single roller bit | |
| CN110905395A (en) | Well drilling speed-increasing system capable of changing bottom hole confining pressure distribution by middle energy gathering | |
| CN212743889U (en) | Double-speed double-core drilling speed increasing system for increasing drilling speed of oil and gas well | |
| CN106968595A (en) | Impact type continuously engages the multi-faceted efficient Mixed drilling bit of cutting | |
| CN218207644U (en) | Novel speed reduction supporting joint device for drilling tool | |
| CN220469796U (en) | Petroleum drilling bit | |
| CN114412365B (en) | Hydraulic jet rotary combined PDC drill bit for petroleum drilling | |
| CN201730546U (en) | Turbine drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |