CN108590534A - A kind of compact-sized wear-resistance bit - Google Patents
A kind of compact-sized wear-resistance bit Download PDFInfo
- Publication number
- CN108590534A CN108590534A CN201810741528.2A CN201810741528A CN108590534A CN 108590534 A CN108590534 A CN 108590534A CN 201810741528 A CN201810741528 A CN 201810741528A CN 108590534 A CN108590534 A CN 108590534A
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- CN
- China
- Prior art keywords
- wing
- bit
- arc
- compact
- slot
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 210000000476 body water Anatomy 0.000 claims 1
- 230000001815 facial effect Effects 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 2
- 210000000515 tooth Anatomy 0.000 description 29
- 238000005553 drilling Methods 0.000 description 13
- 230000006872 improvement Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010058 rubber compounding Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000243 solution 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
-
- 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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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 present invention relates to field of drill, and in particular to a kind of compact-sized wear-resistance bit, including the bizet and bar portion that are welded as a whole, the bizet include the wing being uniformly arranged and wing slot；The cutting facial contour of the wing and wing slot is arc-shaped, the arc of the wing bizet is identical as bit direction, the arc of the wing bar portion is opposite with bit direction, it is provided with pointed tooth in the wing slot, the pointed tooth is evenly distributed along the arc-shaped profile of wing slot, perpendicular to the wing height of the same horizontal line of center line of bit when the height of the pointed tooth is less than along bit, solves complicated present in prior art problem and ineffective technological deficiency.The present invention provides a kind of with drill bit simple in structure and working efficiency high-performance.
Description
Technical field
The present invention relates to field of drill, and in particular to a kind of compact-sized wear-resistance bit.
Background technology
Drill bit is a kind of geological drilling industry commonly drilling tool, between past several years, the quality of PDC cutting tooths and
Huge variation all has occurred in type, and initially, PDC drill bit may be used only in soft shale stratum, the reason is that hard interlayer can damage
Bad drill bit.But due to the appearance of new technology and the variation of structure, PDC drill bit can be used in boring hard interbedded layer and long section at present
Ground consisting of hard rock.PDC drill bit just more and more be people selected by, but at this stage drill bit in use there is also
Following defect：One, complicated；Two, cutting tooth and wing slot are stained with mud influence working efficiency at work.
Invention content
For complicated present in prior art problem and ineffective technological deficiency.The present invention provides one
The new compact-sized wear-resistance bit of kind, the compact-sized wear-resistance bit have property simple in structure and that work efficiency is high
Energy.
The purpose of the present invention is achieved through the following technical solutions：
A kind of compact-sized wear-resistance bit, including drill bit, the drill bit include the bizet being welded as a whole and bar portion, institute
It includes the wing being uniformly arranged and wing slot to state bizet；The cutting facial contour of the wing and wing slot is arc-shaped, the wing
The arc of bizet is identical as bit direction, and the arc of the wing bar portion is opposite with bit direction；The wing packet
Two operator wings and three side tool wings are included, the operator wing includes operator wing A and operator wing B, and the side tool wing includes the side tool wing
A, side tool wing B and side tool wing C, the bizet top is according to operator wing A, side tool wing A, operator wing B, side tool wing B and side tool wing C
Uniformly arrangement；Pointed tooth is provided in the wing slot, the pointed tooth is evenly distributed along the arc-shaped profile of wing slot, the pointed tooth
Perpendicular to the wing height of the same horizontal line of center line of bit when height is less than along bit, the pointed tooth includes pointed tooth member
Part and interconnecting piece；The bar portion is arc-shaped, and the radius of corner of bar portion is equal with center line of bit radius, the bar portion and hat
The connecting portion in portion is arc-shaped, and the radius of corner of connecting portion is 0.1 times of center line of bit radius；Connecting portion instead of
Traditional right angle reduces abrasion, reduces maintenance cost；The radian direction of wing bizet and bar portion is on the contrary, be conducive to be discharged
Mud not will produce mud drum phenomenon.
As a further improvement, the rear end of the wing is provided with rubber absorbers because its have lag, damping and
Can carry out reversible large deformation the characteristics of, for be isolated vibrations and absorb impact, be exactly.In addition to this, rubber also have lag and
Internal friction characteristic, they are usually indicated with fissipation factor, and fissipation factor is bigger, and the damping of rubber and heat are more apparent, damping
Effect is more apparent.The rubber absorbers made of rubber also have good damping effect.
As a further improvement, the interconnecting piece has at least one protrusion, and the corresponding position of wing slot is provided with recess
Portion, protrusion are welded to each other cooperation with recessed portion, and the side of the pointed tooth element is arc-shaped.
As a further improvement, the drill bit further includes cutting tooth, water hole and water channel, and water hole is arranged between each wing
Groove and wing on, the water channel unicom among water hole and bit body.
As a further improvement, titanium alloy layer is arranged in the drill bit outer layer.
As a further improvement, it is provided with nozzle on the water hole on the wing slot, nozzle is threadedly coupled with water hole, nozzle
Inside it is disposed with nozzle cage, sealing ring and cushion pad.
As a further improvement, the bar portion is arc structure wide at the top and narrow at the bottom, and structure wide at the top and narrow at the bottom is conducive to
Weigh centripetal force, reduces the overall volume of drill bit.
Compared with prior art, the beneficial effects of the present invention are：
The cutting facial contour of effect one, wing and the wing slot of the present invention is arc-shaped, the arc and brill of the wing bizet
Head direction of rotation is identical, the arc of wing bar portion with bit direction on the contrary, wing bizet first contacts rock, then by wing bar
It creeps into portion so that drill bit, convenient for arranging mud, is not likely to produce mud drum phenomenon, improves work efficiency in drilling；
Effect two is provided with pointed tooth in the wing slot, and the pointed tooth is evenly distributed along the arc-shaped profile of wing slot, described
Perpendicular to the wing height of the same horizontal line of center line of bit when the height of pointed tooth is less than along bit, can slightly below subtract
Lack the degree of wear of pointed tooth, pointed tooth is provided in wing slot and can quickly be arranged mud in drilling, does not generate and improves drill bit
Breaking capacity and improve the centripetal force of drill bit, improve drilling quality, improve drilling life of bit；
Effect three, bar portion is arc-shaped, and the connecting portion of bar portion and bizet is arc-shaped, the connection transition of bar portion and bizet
Place retains an inclined-plane, and compared to the junction at traditional right angle, in underground job, corner angle are easy to wear, and inclined-plane reduces friction,
Reduce abrasion in drilling bit high-speed rotation process, the radius of corner of bar portion is equal with center line of bit radius, and bar portion is ensureing
Reduce length under the premise of stabilization when bit, simplifies structure.
Description of the drawings
Fig. 1 is the present embodiment overall structure diagram；
Fig. 2 is wing crown configurations schematic diagram；
Fig. 3 is wing bar portion structural schematic diagram；
Fig. 4 is pointed tooth structural schematic diagram；
In figure, 1- bizets, 2-, 3- wings, 4- wing slots, 5- wing bizets, 6- wing bar portions, 7- pointed tooths, 8- operator wing A,
The water holes 9- side tool wings A, 10- operator wing B, 11- side tool wing B, 12- side tool wing C, 13-, 14- water channels, 15- bar portions side, 16-
Rubber shock-absorbing section, 17- cutting tooths, 18- connecting portions, 19- pointed tooth elements, 20- interconnecting pieces.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Middle attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
Applying the component of example can be arranged and designed with a variety of different configurations.Therefore, below to provide in the accompanying drawings the present invention
The detailed description of embodiment is not intended to limit the range of claimed invention, but is merely representative of the selected reality of the present invention
Apply example.Based on the embodiment of the present invention, the institute that those skilled in the art are obtained without making creative work
There is other embodiment, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned term with concrete condition
Concrete meaning in the present invention.
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
Embodiment
The present embodiment provides a kind of compact-sized wear-resistance bit, including drill bit, the drill bit includes being welded as a whole
Bizet (1) and bar portion (2), the bizet (1) include the wing (3) being uniformly arranged and wing slot (4)；The wing (3) and wing slot
(4) cutting facial contour is arc-shaped, and the arc of the wing bizet (5) is identical as bit direction, the wing bar
The arc in portion (6) with bit direction on the contrary, the curved profile of entire wing is S-shaped, when drill bit is in operation, bit
When wing bizet first contact rock, then crept by wing bar portion so that drill bit, convenient for arranging mud, is not likely to produce in drilling
Mud drum phenomenon, improves work efficiency；The wing (3) includes two operator wings and three side tool wings, the operator wing include
Operate wing A (8) and operator wing B (10), is in 72 ° between each wing；The side tool wing includes side tool wing A (9), side tool wing B (11)
With side tool wing C (12), the bizet top according to operator wing A (8), side tool wing A (9), operator wing B (10), side tool wing B (11) and
Side tool wing C (12) uniformly arranges, and ensure that the stability of drill bit bizet when rotating at high speed so that the total quality of drill bit is distributed
Uniformly, as the increase of angular speed, the rotating speed of drill bit are also increasing, torque is substantially linearly distributed, and is reduced due to quality
It is unevenly distributed the centrifugal force brought when leading to drilling bit high-speed rotary；The bar portion (2) is arc structure wide at the top and narrow at the bottom, upper width
Under narrow structure be conducive to balanced centripetal force, reduce the overall volume of drill bit；Pointed tooth (7) is provided in the wing slot, it is described
Pointed tooth (7) is evenly distributed along the arc-shaped profile of wing slot (4), and the height of the pointed tooth (7) is vertical when being less than along bit
In wing (3) height of the same horizontal line of center line of bit, the pointed tooth (7) includes pointed tooth element (19) and interconnecting piece
(20), there is interconnecting piece (20) at least one protrusion, the corresponding position of wing slot to be provided with recessed portion, and protrusion is mutually welded with recessed portion
Cooperation is connect, the side of the pointed tooth element (19) is arc-shaped, carries certain radian, and pointed tooth is slightly below the mill that can reduce pointed tooth
Damage degree is provided with pointed tooth in wing slot and can quickly be arranged mud in drilling, do not generate the breaking capacity for improving drill bit
And the centripetal force of drill bit is improved, drilling quality is improved, drilling life of bit is improved；The bar portion (2) is arc-shaped, bar portion side
The radius of corner in face (15) is equal with center line of bit radius, and the connecting portion (18) of the bar portion (2) and bizet (1) is in circular arc
Shape, the radius of corner of connecting portion (18) are 0.1 times of center line of bit radius, and the connection transition position of bar portion and bizet retains one
A inclined-plane, compared to the junction at traditional right angle, in underground job, corner angle are easy to wear, and inclined-plane reduces friction, in drilling bit high-speed
Reduce abrasion in rotation process, the radius of corner of bar portion is equal with center line of bit radius, and bar portion is ensureing bit
When stabilization under the premise of reduce length, simplified structure.The rear end of the wing (3) is provided with rubber absorbers (16),
Rubber absorbers can freely determine shape, control hardness by adjusting rubber compounding component, can meet rigid to all directions
The requirement of degree and intensity, can freely determine shape, control hardness by adjusting rubber compounding component, can meet to each side
Requirement to rigidity and intensity, being capable of effective noise reduction function in operation.
Specifically, the drill bit further includes cutting tooth (17), water hole (13) and water channel (14), wing slot is arranged in water hole (13)
(4) and on wing (3), water hole (13) and water channel (14) unicom among bit body；, the water hole (13) on the wing slot (4)
On be provided with nozzle, nozzle is threadedly coupled with water hole, is disposed with nozzle cage, sealing ring and cushion pad in nozzle, and nozzle will
The water injection of indirect water channel comes out, and is conducive to clean the mud in wing slot, will not say that pointed tooth mud encases, leads to not smoothly
Probing generates bit freezing phenomenon.
Specifically, titanium alloy layer is arranged in the drill bit outer layer, the anticorrosion antiwear performance of drill bit is increased.
The above is only a preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form is not to be taken as excluding other embodiments, and can be used for other combinations, modifications, and environments, and can be at this
In the text contemplated scope, modifications can be made through the above teachings or related fields of technology or knowledge.And those skilled in the art institute into
Capable modifications and changes do not depart from the spirit and scope of the present invention, then all should be in the protection domain of appended claims of the present invention
It is interior.
Claims (8)
1. a kind of compact-sized wear-resistance bit, including drill bit, the drill bit includes the bizet (1) being welded as a whole and bar portion
(2), which is characterized in that
The bizet (1) includes the wing (3) being uniformly arranged and wing slot (4)；It takes turns in the cutting face of the wing (3) and wing slot (4)
Exterior feature be arc-shaped, the arc of the wing bizet (5) is identical with bit direction, the arc of the wing bar portion (6) and
Bit direction is opposite；The wing (3) includes two operator wings and three side tool wings, and the operator wing includes operator wing A
(8) and operator wing B (10), the side tool wing includes side tool wing A (9), side tool wing B (11) and side tool wing C (12), the bizet top
It uniformly arranges according to operator wing A (8), side tool wing A (9), operator wing B (10), side tool wing B (11) and side tool wing C (12) at end；It is described
Pointed tooth (7) is provided in wing slot, the pointed tooth (7) is evenly distributed along the arc-shaped profile of wing slot (4), the pointed tooth (7)
Include perpendicular to wing (3) height of the same horizontal line of center line of bit, the pointed tooth (7) when height is less than along bit
Pointed tooth element (19) and interconnecting piece (20)；
The bar portion (2) is arc-shaped, and the radius of corner of bar portion side (15) is equal with center line of bit radius, the bar portion
(2) it is arc-shaped with the connecting portion of bizet (1) (18), the radius of corner of connecting portion (18) is center line of bit radius
0.1 times.
2. compact-sized wear-resistance bit according to claim 1, which is characterized in that the rear end of the wing (3) is arranged
There are rubber absorbers (16).
3. compact-sized wear-resistance bit according to claim 1, which is characterized in that the interconnecting piece (20) has at least
One protrusion, the corresponding position of wing slot are provided with recessed portion, and protrusion is welded to each other cooperation with recessed portion.
4. compact-sized wear-resistance bit according to claim 1, which is characterized in that the side of the pointed tooth element (19)
It is arc-shaped.
5. compact-sized wear-resistance bit according to claim 1, which is characterized in that the drill bit further includes cutting tooth
(17), water hole (13) and water channel (14), water hole (13) are arranged on wing slot (4) and wing (3), among water hole (13) and bit body
Water channel (14) unicom.
6. compact-sized wear-resistance bit according to claim 5, which is characterized in that the water hole on the wing slot (4)
(13) nozzle is provided on, nozzle is threadedly coupled with water hole, and nozzle cage, sealing ring and cushion pad are disposed in nozzle.
7. compact-sized wear-resistance bit according to claim 1, which is characterized in that titanium alloy is arranged in the drill bit outer layer
Layer.
8. compact-sized wear-resistance bit according to claim 1, which is characterized in that the bar portion (2) is wide at the top and narrow at the bottom
Arc structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810741528.2A CN108590534B (en) | 2018-07-06 | 2018-07-06 | Wear-resisting drill bit with compact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810741528.2A CN108590534B (en) | 2018-07-06 | 2018-07-06 | Wear-resisting drill bit with compact structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108590534A true CN108590534A (en) | 2018-09-28 |
| CN108590534B CN108590534B (en) | 2024-06-21 |
Family
ID=63615061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810741528.2A Active CN108590534B (en) | 2018-07-06 | 2018-07-06 | Wear-resisting drill bit with compact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108590534B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080283305A1 (en) * | 2007-05-18 | 2008-11-20 | Baker Hughes Incorporated | Method of Repairing Diamond Rock Bit |
| CN201588550U (en) * | 2009-11-03 | 2010-09-22 | 陕西金刚石油机械有限公司 | Stagewise spiral cutter edge type PDC drill bit |
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
| CN203701983U (en) * | 2013-12-30 | 2014-07-09 | 克拉玛依市新锋锐金刚石钻头制造有限公司 | Steel body spiral four blade PDC (Polycrystalline Diamond Compact) bit |
| CN203808848U (en) * | 2014-03-24 | 2014-09-03 | 杭州海勒科技有限公司 | (Polycrystalline Diamond Compact) PDC drill bit used for oilfield exploration |
| RU2581059C1 (en) * | 2015-03-26 | 2016-04-10 | ООО "Камышинский завод бурового инструмента" (ООО "КЗБИ") | Percussion-rotary drilling bit |
| CN206592074U (en) * | 2017-03-20 | 2017-10-27 | 中石化华东石油工程有限公司六普钻井分公司 | A kind of low erosion rock core coring bit of anti-mud drum suitable for easy aquation mudstone stratum |
| US20170335632A1 (en) * | 2016-05-17 | 2017-11-23 | Ajax Tool Works, Inc. | Rotary Percussive Piloted Rock Drill Bit |
| CN206972164U (en) * | 2017-05-04 | 2018-02-06 | 成都市众思诚科技有限公司 | A kind of gear wheel PDC composite drill bits |
| CN208364058U (en) * | 2018-07-06 | 2019-01-11 | 立府精密机械有限公司 | A kind of compact-sized wear-resistance bit |
-
2018
- 2018-07-06 CN CN201810741528.2A patent/CN108590534B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080283305A1 (en) * | 2007-05-18 | 2008-11-20 | Baker Hughes Incorporated | Method of Repairing Diamond Rock Bit |
| CN201588550U (en) * | 2009-11-03 | 2010-09-22 | 陕西金刚石油机械有限公司 | Stagewise spiral cutter edge type PDC drill bit |
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
| CN203701983U (en) * | 2013-12-30 | 2014-07-09 | 克拉玛依市新锋锐金刚石钻头制造有限公司 | Steel body spiral four blade PDC (Polycrystalline Diamond Compact) bit |
| CN203808848U (en) * | 2014-03-24 | 2014-09-03 | 杭州海勒科技有限公司 | (Polycrystalline Diamond Compact) PDC drill bit used for oilfield exploration |
| RU2581059C1 (en) * | 2015-03-26 | 2016-04-10 | ООО "Камышинский завод бурового инструмента" (ООО "КЗБИ") | Percussion-rotary drilling bit |
| US20170335632A1 (en) * | 2016-05-17 | 2017-11-23 | Ajax Tool Works, Inc. | Rotary Percussive Piloted Rock Drill Bit |
| CN206592074U (en) * | 2017-03-20 | 2017-10-27 | 中石化华东石油工程有限公司六普钻井分公司 | A kind of low erosion rock core coring bit of anti-mud drum suitable for easy aquation mudstone stratum |
| CN206972164U (en) * | 2017-05-04 | 2018-02-06 | 成都市众思诚科技有限公司 | A kind of gear wheel PDC composite drill bits |
| CN208364058U (en) * | 2018-07-06 | 2019-01-11 | 立府精密机械有限公司 | A kind of compact-sized wear-resistance bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108590534B (en) | 2024-06-21 |
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Effective date of registration: 20240603 Address after: 300000 next to the bus stop of Lilin group, Fukang Road, Sanhe Village, gegu Town, Jinnan District, Tianjin Applicant after: TIANJIN LILIN BIT Co.,Ltd. Country or region after: China Address before: 618300 East 2nd section of Zhuhai Road, Guanghan Economic Development Zone, Deyang City, Sichuan Province Applicant before: LIFU PRECISION MACHINERY Co.,Ltd. Country or region before: China |
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