CN110439467A - A kind of reaming block formula concentric simultaneous casing drilling tool - Google Patents
A kind of reaming block formula concentric simultaneous casing drilling tool Download PDFInfo
- Publication number
- CN110439467A CN110439467A CN201910696502.5A CN201910696502A CN110439467A CN 110439467 A CN110439467 A CN 110439467A CN 201910696502 A CN201910696502 A CN 201910696502A CN 110439467 A CN110439467 A CN 110439467A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- reaming block
- concentric
- lock sleeve
- upper layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 71
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000004575 stone Substances 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
-
- 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/327—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being pivoted about a longitudinal axis
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
A kind of reaming block formula concentric simultaneous casing drilling tool, including concentric drill bit, reaming block, lock sleeve and locking system, the reaming block is mounted in the rotary shaft hole of concentric drill bit by rotary shaft, the reaming block axially limits reaming block by the lock sleeve being sleeved on outside concentric drill bit after being mounted on concentric drill bit, the lock sleeve is fixed on concentric drill bit by locking system, the present apparatus guarantees the locking of reaming block, prevent reaming block from falling and failing, drilling can be completed in the complicated geology for being not easy pore-forming such as loose rubble and sandy gravel and hard withered stone, and effective pore-forming, and the concentricity in hole is high.
Description
Technical field
The present invention relates to a kind of reaming block formula concentric simultaneous casing drilling tools.
Background technique
At present in engineering drilling construction, casing drilling tool obtains relatively broad application in down-the-hole drilling technology；It is wherein same
Heart drilling tool is constructed in drilling construction frequently with the concentric drilling tool of reaming block formula, and the existing concentric drilling tool of reaming block formula includes center a few days ago
Drill bit, virtual calibrator for instrument transformer, reaming block and locking system composition, wherein reaming block be usually the centrally disposed drill bit of muti-piece and virtual calibrator for instrument transformer it
Between, it is locked by locking system (using lateral pin+split pin form)；Drilling tool reaming block in non-working condition is in receive
Hold together state, when work, the pressure due to center bit (or reaming block) contact ground by rock stratum, by reaming in revolution engineering
Block is spread apart, and reaches operating position, and reaming block will be close to center bit and virtual calibrator for instrument transformer at this time, virtual calibrator for instrument transformer stepped locations and shoe
Contact, impact force is passed to pipe, reaches drilling follow-up purpose.When drilling tool recycling, be lifted up (or reversion half-turn mentions again
Rise), so that reaming block is become rounding state, takes out drilling tool.But the concentric drilling tool of current reaming block formula is in use, due to drilling tool
The abrasion and vibration of fastening system, cause reaming block to be easy to fall and fail, or due to formation variations cause drilling tool bit freezing or
Reaming block fractures, thus need it is a kind of can be completed in intricately condition drilling needs, and energy high reliablity drilling tool.
Summary of the invention
In view of the deficiencies of the prior art the present invention propose a kind of locking of guarantee reaming block, prevent reaming block from falling and fail,
Can be completed in the complicated geology for being not easy pore-forming such as loose rubble and sandy gravel and hard withered stone drilling and effectively pore-forming,
And the high reaming block formula concentric simultaneous casing drilling tool of concentricity in hole.
The purpose of the present invention is achieved by using following technical proposals:
A kind of reaming block formula concentric simultaneous casing drilling tool, including concentric drill bit, reaming block, lock sleeve and locking system, the expansion
Hole block is mounted in the rotary shaft hole of concentric drill bit by rotary shaft, and the reaming block passes through suit after being mounted on concentric drill bit
Lock sleeve outside concentric drill bit axially limits reaming block, and the lock sleeve is fixed on concentric drill bit by locking system
On.
Further, the locking system includes split pin and lateral pin, set on the lock sleeve there are two it is opposite, with it is interior
The pin hole of chamber connection, the concentric drill bit are equipped with the cotter way to match with pin hole position, and lock sleeve is sleeved on concentric drill bit and arrives
Behind position, one end of the lateral pin is penetrated from one of pin hole, is passed through cotter way, is pierced by from another pin hole, described after being pierced by
Lateral pin is fixed in pin hole by split pin.
Further, the head end of the concentric drill bit is by being arranged concentrically the spline of upper layer drill bit, lower layer's drill bit and tail end
It constitutes, lower layer's bit diameter is greater than upper layer drill bit, and the part of lower layer's drill bit protrusion upper layer drill bit forms step, described
The first drilling face that the top surface of upper layer drill bit is formed, the top surface excircle of the upper layer drill bit are equipped with a chamfering, chamfering place
Face forms the second drilling face of annular, and face where the step structure forms the third drilling face of annular, the upper layer drill bit it is straight
The internal diameter of diameter and lock sleeve matches, column type hard alloy of arranging on the first, second, third drilling face.
Further, on the outer wall of the upper layer drill bit centered on the drill bit shaft heart of upper layer, central symmetry is laid with along axis
To three through slots of laying constitute dump tank, lower layer's drill bit protrusion upper layer bit part outer wall on, in each deslagging
The corresponding position of slot is equipped with the reaming block mounting groove being connected to dump tank, and the reaming block mounting groove is towards face where lock sleeve
The bottom surface of bottom surface, the reaming block mounting groove is equipped with rotary shaft hole, and the reaming block is mounted on the rotation by rotary shaft
In axis hole.
Further, the reaming block is equipped with the 6th drilling face, is laid with column type hard side by side on the 6th drilling face
Two sides of alloy, the reaming block are relatively close to form an inclined surface in end.
Further, the inner wall of the lock sleeve is equipped with lug, the upper layer drill bit of the concentric drill bit be equipped with it is convex
The side of the groove that ear matches, the groove is connected to dump tank.
Further, the top surface of the lock sleeve forms the 4th drilling face of annular, the top surface excircle of the lock sleeve
Equipped with a chamfering, face where chamfering forms the 5th drilling face of annular.
Further, the lock sleeve is equipped with the first annular boss that protrudes towards axle center in the inner wall of head end, and described first
The internal diameter of annular convex platform and the upper layer outside diameter size of concentric drill bit match, the outer wall of the upper layer drill bit of the concentric drill bit
It is equipped with the second annular convex platform to match with the first annular boss, after the lock sleeve is sleeved on the outside of the drill bit of upper layer,
Lock sleeve, which is limited, by first annular boss and the second annular convex platform is inserted in depth.
In conclusion the present apparatus can be in rock stratum complicated condition or partially hard, band under the geology operating condition of pore-forming difficulty and difficult pore-forming
Dynamic wall protection pipe drilling uses, and deslagging is unobstructed；It is able to satisfy and beats the engineerings such as geothermal well, mini pile, the middle-size and small-size bored concrete pile of building, well
Demand；Wherein each component of drilling tool increases its long service life by surface specially treated technique, is able to satisfy other drilling tool structures
Construction cost high request reduces construction cost；Easy to operate and convenient disassembly in use.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the explosive view of Fig. 1；
Structural schematic diagram when Fig. 3 is reaming block working condition of the present invention；
Structural schematic diagram when Fig. 4 is reaming block off working state of the present invention；
In figure: the concentric drill bit of 1-, 2- reaming block, 3- lock sleeve, 4- split pin, 5- lateral pin, the second annular convex platform of 11-, 12-
Groove, 13- rotary shaft hole, 14- cotter way, 15- dump tank, the upper layer 16- drill bit, 161- first creep into face, 162- second creeps into face,
17- lower layer drill bit, 171- third drilling face, 21- the 6th creep into face, the inclined surface 22-, 23- rotary shaft, 31- the 5th creep into face,
32- the 4th creeps into face, 33- lug, the first annular boss of 34-.
Specific embodiment
With reference to the accompanying drawing and specific example, a kind of specific embodiment party of reaming block formula concentric simultaneous casing drilling tool is described in detail
Formula.
As shown in Figures 1 to 4, a kind of reaming block formula concentric simultaneous casing drilling tool, including concentric drill bit 1, reaming block 2, lock sleeve 3,
Split pin 4 and lateral pin 5.The reaming block 2 is mounted in the rotary shaft hole 13 of concentric drill bit 1 by rotary shaft 23, and is passed through
The lock sleeve 3 being sleeved on outside concentric drill bit 1 is axial to reaming block 2 to be limited, and lock sleeve 3 is by split pin 4 and lateral pin 5 and together
Heart drill bit 1 is locked, specific moreover, being set on lock sleeve 3 there are two pin hole that is opposite, being connected to inner cavity, on the concentric drill bit 1
Equipped with the cotter way 14 to match with pin hole position, after lock sleeve 3 is sleeved on concentric drill bit 1 in place, by one end of lateral pin 5 from one
Pin hole penetrates, and by cotter way 14, is pierced by from another pin hole, then fixed by split pin 4, when preventing drilling tool from inverting, Concentric drilling
First 1 disengages with lock sleeve 3, constitutes locking device after lock sleeve 3 and the assembly of concentric drill bit 1, prevents reaming block 2 from opening and receiving
It falls off when holding together；
Concentric drill bit 1 and existing drill bit structure are substantially similar, the difference is that concentric drill bit 1 head end by concentric
The spline that upper layer drill bit 16 and lower layer's drill bit 17 and tail end is arranged is constituted, and 17 diameter of lower layer's drill bit is greater than upper layer drill bit
16, the part formation step of the protrusion of the lower layer's drill bit 17 upper layer drill bit 16, the first of the top surface formation of the upper layer drill bit 16
Drilling face 161, the top surface excircle of the upper layer drill bit are equipped with a chamfering, and face where chamfering forms the second drilling face of annular
162, face where the step structure forms the third drilling face 171 of annular, and the diameter of the upper layer drill bit 17 is interior with lock sleeve 3
Diameter matches, column type hard alloy of arranging on first, second, third drilling face, first, second, third drilling face
For positive rake angle arrangement, on the outer wall of the upper layer drill bit 16 centered on 16 axle center of upper layer drill bit, central symmetry is laid with along axis
To three through slots of laying constitute dump tank 15, lower layer's drill bit 17 protrusion 16 part of upper layer drill bit outer wall on, every
The corresponding position of a dump tank is equipped with the reaming block mounting groove being connected to dump tank, and the reaming block mounting groove is towards lock sleeve institute
It is bottom surface in face, the bottom surface of the reaming block mounting groove is equipped with and 23 size of rotary shaft matches on reaming block 2 rotary shaft
Hole 13, the reaming block 2 are mounted in the rotary shaft hole 13 by rotary shaft 23.
Reaming block 2 is equipped with the 6th drilling face 21, is laid with column type hard alloy on the 6th drilling face 21 side by side, and the described 6th
Drilling face 21 is arranged using positive rake angle；Two sides of reaming block 2 are relatively close to form an inclined surface 22 in end, this inclines
Inclined-plane known in the art as steering angle, the setting of reaming block 2 are conducive to revolution most when steering angle makes drill bit turn round work
The drill bit shear surface for first contacting rock stratum, can effectively prevent bit freezing phenomenon；Reaming block is equipped with rotary shaft, and reaming block passes through rotary shaft
It opens and collapses, when drilling tool work, rotate forward and open reaming, after the completion of work, reversion recycling；
The inner wall of lock sleeve 3 is equipped with lug 34, and the upper layer drill bit 16 of concentric drill bit 1 is equipped with to match with lug 34
The side of groove 12, the groove 12 is connected to dump tank, and the lug 34 of lock sleeve 3 enters 12 place of groove by dump tank
Position, then by rotation so that lug 34 is installed in groove 12, the top surface of the lock sleeve 3 forms the 4th drilling of annular
Face 32, the top surface excircle of the lock sleeve 3 are equipped with a chamfering, and face where chamfering forms the 5th drilling face 31 of annular；Lock
Fixed 3 are mounted on concentric drill bit 1 and after being installed in place, and first, second, the four, the 5th drilling faces are an overall structure
Face is crept into front end, and third, the 6th drilling face form an overall structure rear end and creep into face.
Distributed pores on concentric drill bit 1, air flue is distributed the cleaning of advantageous device to hole bed rock slag and rock slag returns out aperture；With one heart
Drill bit 1 transmits rotary torque and power by the spline of tail end.The concentric drill bit 1 of the present apparatus is formed after connecting with lock sleeve 3 and is bored
The guide table of tool, there is a guiding role at work, and reaming block 2 is equipped with steering angle, be not easy due to formation variations drilling tool bit freezing and
Reaming block is caused to fracture.
The lock sleeve 3 is equipped with the first annular boss 33 protruded towards axle center in the inner wall of head end, described first annular convex
The internal diameter of platform 33 and the 16 outer diameter size of upper layer drill bit of concentric drill bit match, the outer wall of the upper layer drill bit 16 of the concentric drill bit
It is equipped with the second annular convex platform 11 to match with the first annular boss 33, the lock sleeve 3 is sleeved on upper layer drill bit 16
Behind outside, lock sleeve 3 is limited by first annular boss 33 and the second annular convex platform 11 and is inserted in depth.
When work, after concentric drill bit 1 is assembled with reaming block 2, reaming block is fixed on concentric drill bit 1 by lock sleeve 3,
Lock sleeve 3 on being locked at concentric drill bit 1, prevents lock sleeve 3 from falling by locking system.After assembling, meet in external action
Power reaming block 2 can around rotating shaft collapse and open, thus complete impact and rotate broken rock reach pore-forming.The present apparatus is not
Reaming block 2 is in rounding state when working condition；When operating, since concentric drill bit 1 and reaming block 2 contact ground, by rock stratum
Pressure, reaming block 2 spread apart in revolution engineering, reaches operating position, reaming block 2 will be close to concentric drill bit 1 at this time,
And impact force and torque are transmitted to rock stratum, achieve the purpose that broken rock；When drilling tool recycling, reversion half-turn lifts again, makes
Reaming block 2 becomes rounding state, takes out drilling tool.
Above-mentioned is the preferred embodiment of the present invention, but those skilled in the art should be understood that do not depart from it is appended
In the spirit and scope of the present invention defined by claims, the various changes to made by the present invention in form and details
Change, belongs to protection scope of the present invention.
Claims (8)
1. a kind of reaming block formula concentric simultaneous casing drilling tool, it is characterised in that: including concentric drill bit, reaming block, lock sleeve and locking system
System, the reaming block are mounted in the rotary shaft hole of concentric drill bit by rotary shaft, and the reaming block is mounted on concentric drill bit
Reaming block is axially limited by the lock sleeve being sleeved on outside concentric drill bit afterwards, the lock sleeve is fixed by locking system
On concentric drill bit.
2. reaming block formula concentric simultaneous casing drilling tool according to claim 1, it is characterised in that: the locking system includes opening
Pin and lateral pin are set on the lock sleeve there are two pin hole that is opposite, being connected to inner cavity, and the concentric drill bit is equipped with and pin hole
The cotter way that position matches, after lock sleeve is sleeved on concentric drill bit in place, one end of the lateral pin is penetrated from one of pin hole,
It across cotter way, is pierced by from another pin hole, the lateral pin after being pierced by is fixed in pin hole by split pin.
3. reaming block formula concentric simultaneous casing drilling tool according to claim 1 or 2, it is characterised in that: the head of the concentric drill bit
End is made of the spline for being arranged concentrically upper layer drill bit, lower layer's drill bit and tail end, and lower layer's bit diameter is greater than upper layer drill bit,
The part of lower layer's drill bit protrusion upper layer drill bit forms step, the first drilling face that the top surface of the upper layer drill bit is formed, institute
The top surface excircle for stating upper layer drill bit is equipped with a chamfering, and face where chamfering forms the second drilling face of annular, the step structure
Place face forms the third drilling face of annular, and the diameter of the upper layer drill bit and the internal diameter of lock sleeve match, and described first, the
Two, arrangement column type hard alloy on third drilling face.
4. reaming block formula concentric simultaneous casing drilling tool according to claim 3, it is characterised in that: on the outer wall of the upper layer drill bit
Centered on the drill bit shaft heart of upper layer, central symmetry be laid with and constituted dump tank along three through slots axially laid, the lower layer bores
Head is on the outer wall of protrusion upper layer bit part, in the corresponding position of each dump tank equipped with the reaming block peace being connected to dump tank
Tankage, the reaming block mounting groove are bottom surface towards face where lock sleeve, and the bottom surface of the reaming block mounting groove is equipped with rotation
Axis hole, the reaming block are mounted in the rotary shaft hole by rotary shaft.
5. reaming block formula concentric simultaneous casing drilling tool according to claim 3, it is characterised in that: the reaming block is equipped with the 6th and bores
Into face, column type hard alloy is laid on the 6th drilling face side by side, two sides of the reaming block are connected to each other in end
Closely form an inclined surface.
6. reaming block formula concentric simultaneous casing drilling tool according to claim 4, it is characterised in that: set on the inner wall of the lock sleeve
There is lug, the upper layer drill bit of the concentric drill bit is equipped with the groove to match with lug, and the side of the groove is with dump tank
Connection.
7. reaming block formula concentric simultaneous casing drilling tool according to claim 3, it is characterised in that: the top surface of the lock sleeve is formed
4th drilling face of annular, the top surface excircle of the lock sleeve are equipped with a chamfering, and face where chamfering forms the 5th of annular
Drilling face.
8. reaming block formula concentric simultaneous casing drilling tool according to claim 1, it is characterised in that: the lock sleeve is in head end
Wall is equipped with the first annular boss protruded towards axle center, the upper layer outside diameter of the internal diameter and concentric drill bit of the first annular boss
Size matches, and the outer wall of the upper layer drill bit of the concentric drill bit is equipped with the second ring to match with the first annular boss
Shape boss after the lock sleeve is sleeved on the outside of the drill bit of upper layer, limits locking by first annular boss and the second annular convex platform
It is inserted in depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696502.5A CN110439467A (en) | 2019-07-30 | 2019-07-30 | A kind of reaming block formula concentric simultaneous casing drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696502.5A CN110439467A (en) | 2019-07-30 | 2019-07-30 | A kind of reaming block formula concentric simultaneous casing drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110439467A true CN110439467A (en) | 2019-11-12 |
Family
ID=68432378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910696502.5A Pending CN110439467A (en) | 2019-07-30 | 2019-07-30 | A kind of reaming block formula concentric simultaneous casing drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110439467A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856429A (en) * | 2022-04-22 | 2022-08-05 | 北京中煤矿山工程有限公司 | Horizontal raise boring bit with slag skimming and conveying functions |
| TWI785483B (en) * | 2021-01-29 | 2022-12-01 | 東明海事工程有限公司 | Reaming bit structure of drilling machine |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5787999A (en) * | 1996-07-01 | 1998-08-04 | Holte; Ardis L. | Drill bit with set of underreamer arms |
| JPH11200750A (en) * | 1998-01-07 | 1999-07-27 | Hokuriku Engineering Kk | Excavation bit for winding hole and execution method using it |
| CN1460768A (en) * | 2002-03-23 | 2003-12-10 | 林秉德 | Drilling bit structure for enlarging hole |
| CN2606169Y (en) * | 2003-03-17 | 2004-03-10 | 杨俊志 | Homocentric drill with separate drive |
| CN202483434U (en) * | 2012-02-21 | 2012-10-10 | 罗明浩 | Eccentric casing drilling tool |
| CN102926663A (en) * | 2011-11-10 | 2013-02-13 | 广汉市井管厂 | Concentric sliding block simultaneous casing drilling tool, center drilling bit and centralizer |
| CN203188910U (en) * | 2013-03-22 | 2013-09-11 | 广汉市井管厂 | Flail block broaching simultaneous casing drilling tool |
| CN103375135A (en) * | 2012-04-25 | 2013-10-30 | 宜昌市五环钻机具有限责任公司 | Integrated concentric drill pipe |
| CN106639914A (en) * | 2016-12-08 | 2017-05-10 | 长沙黑金刚实业有限公司 | Eccentric casing drilling tool |
| CN210714474U (en) * | 2019-07-30 | 2020-06-09 | 长沙天和钻具机械有限公司 | Reaming block type concentric pipe following drilling tool |
-
2019
- 2019-07-30 CN CN201910696502.5A patent/CN110439467A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5787999A (en) * | 1996-07-01 | 1998-08-04 | Holte; Ardis L. | Drill bit with set of underreamer arms |
| JPH11200750A (en) * | 1998-01-07 | 1999-07-27 | Hokuriku Engineering Kk | Excavation bit for winding hole and execution method using it |
| CN1460768A (en) * | 2002-03-23 | 2003-12-10 | 林秉德 | Drilling bit structure for enlarging hole |
| CN2606169Y (en) * | 2003-03-17 | 2004-03-10 | 杨俊志 | Homocentric drill with separate drive |
| CN102926663A (en) * | 2011-11-10 | 2013-02-13 | 广汉市井管厂 | Concentric sliding block simultaneous casing drilling tool, center drilling bit and centralizer |
| CN202483434U (en) * | 2012-02-21 | 2012-10-10 | 罗明浩 | Eccentric casing drilling tool |
| CN103375135A (en) * | 2012-04-25 | 2013-10-30 | 宜昌市五环钻机具有限责任公司 | Integrated concentric drill pipe |
| CN203188910U (en) * | 2013-03-22 | 2013-09-11 | 广汉市井管厂 | Flail block broaching simultaneous casing drilling tool |
| CN106639914A (en) * | 2016-12-08 | 2017-05-10 | 长沙黑金刚实业有限公司 | Eccentric casing drilling tool |
| CN210714474U (en) * | 2019-07-30 | 2020-06-09 | 长沙天和钻具机械有限公司 | Reaming block type concentric pipe following drilling tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI785483B (en) * | 2021-01-29 | 2022-12-01 | 東明海事工程有限公司 | Reaming bit structure of drilling machine |
| CN114856429A (en) * | 2022-04-22 | 2022-08-05 | 北京中煤矿山工程有限公司 | Horizontal raise boring bit with slag skimming and conveying functions |
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