CN112211561A - Dual-purpose diamond geological drill bit convenient to installation - Google Patents
Dual-purpose diamond geological drill bit convenient to installation Download PDFInfo
- Publication number
- CN112211561A CN112211561A CN202010917302.0A CN202010917302A CN112211561A CN 112211561 A CN112211561 A CN 112211561A CN 202010917302 A CN202010917302 A CN 202010917302A CN 112211561 A CN112211561 A CN 112211561A
- Authority
- CN
- China
- Prior art keywords
- dual
- purpose diamond
- sealing ring
- drill bit
- fixedly connected
- 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
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 51
- 239000010432 diamond Substances 0.000 title claims abstract description 51
- 238000009434 installation Methods 0.000 title claims abstract description 7
- 239000003245 coal Substances 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 39
- 239000011435 rock Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 230000001174 ascending effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
-
- 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
- E21B12/00—Accessories for drilling tools
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 provides a dual-purpose diamond geological drill bit convenient to install, and relates to the technical field of geological drill bits. This dual-purpose diamond geology drill bit convenient to installation, including drilling rod and the dual-purpose diamond drill bit of coal petrography, the surface fixedly connected with fixed disk of the dual-purpose diamond drill bit of coal petrography, the surface of the dual-purpose diamond drill bit of coal petrography and the top fixedly connected with fixed block that is located the fixed disk, the up end fixedly connected with dead lever of the dual-purpose diamond drill bit of coal petrography. Hook the solid fixed ring of trapezoidal plate through the catching groove of connecting rod, give an ascending pulling force of dead lever, the pulling force is bigger for the pulling force of dead lever behind rivers effect and conical plate, makes in fixed block chucking and the annular spout, and the annular spout blocks that the fixed block further rotates simultaneously, and the fore-set card is between two connecting holes, makes the internal connection body and the dual-purpose diamond bit of coal petrography constitute a whole, connects very reliably, and the dismantlement process is unanimous with the installation, and is very convenient.
Description
Technical Field
The invention relates to the technical field of geological drill bits, in particular to a dual-purpose diamond geological drill bit convenient to mount.
Background
The dual-purpose diamond bit of well drilling in-process during the drill bit, current coal petrography is connected with the drilling rod through helicitic texture, can make it produce damage or corrosion after long-term the use, at this moment just need dismantle the change to the dual-purpose diamond bit of coal petrography, owing to use threaded connection's mode, it is all very slow to dismantle the installation, produce the corrosion back in threaded connection department, it is more difficult to dismantle, need change drilling rod and the dual-purpose diamond bit of coal petrography simultaneously when serious, the cost is than higher.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a dual-purpose diamond geological drill bit convenient to install, and solves the problem that the coal and rock dual-purpose diamond drill bit and a drill rod are inconvenient to install and disassemble in a threaded connection mode.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a dual-purpose diamond geological drill bit convenient to install comprises a drill rod and a coal-rock dual-purpose diamond drill bit, wherein a fixed disc is fixedly connected to the outer surface of the coal-rock dual-purpose diamond drill bit, a fixed block is fixedly connected to the outer surface of the coal-rock dual-purpose diamond drill bit and positioned above the fixed disc, a fixed rod is fixedly connected to the upper end face of the coal-rock dual-purpose diamond drill bit, one end, far away from the coal-rock dual-purpose diamond drill bit, of the fixed rod is rotatably connected with a trapezoidal plate, a conical plate is fixedly connected to the upper side face of the trapezoidal plate, a fixed ring is fixedly connected to the front side face of the trapezoidal plate, two first connecting grooves are formed in the upper surface of the fixed disc, a third sealing ring and a fourth sealing ring are respectively arranged in the first connecting grooves, a first connecting hole is formed in the upper surface of the fixed disc and positioned between the, a second spring is fixedly connected between the jacking column and the inner bottom surface of the first connecting hole, the inner surface of the drill rod is in threaded connection with an inner connecting body, the side wall of the inner connecting body is provided with a sliding port, the inside of the sliding port is in sliding connection with a movable plate, a first spring is fixedly connected between the lower surface of the movable plate and the sliding port, one side of the movable plate, far away from the sliding port, is positioned on the outer surface of the inner connecting body and is fixedly connected with an adjusting ring, the inner side surface of the adjusting ring is provided with a first sealing ring and a second sealing ring, the upper surface of the movable plate is fixedly connected with a connecting rod, one end, far away from the adjusting ring, of the connecting rod is provided with a hook groove, the hook groove is in sliding connection with a fixed ring, a sealing pipe is arranged inside the inner connecting body, the inner side surface of the inner connecting body is provided with a vertical sliding groove, and the vertical sliding groove is connected with one end of the annular sliding groove.
Preferably, the third sealing ring is located on the inner side of the fourth sealing ring, and the third sealing ring and the fourth sealing ring both extend out of the upper surface of the fixed disc.
Preferably, the outer surface of the inner coupling body, which is not engaged with the drill rod, is not threaded, and the adjusting ring is slidably coupled to the outer surface of the lower portion of the inner coupling body.
Preferably, the first sealing ring is located above the second sealing ring, and the first sealing ring is located above the movable plate.
Preferably, the lower surface of the inner connecting body is provided with two second connecting grooves and a row of second connecting holes, and the second connecting holes are located between the two second connecting grooves.
Preferably, the maximum curvature of the conical plate corresponds to the curvature of the inner surface of the drill rod.
Preferably, the top post is kept away from the one end of second spring and the up end of second connecting hole all is the hemisphere, the top post can with second connecting hole sliding connection.
Preferably, the right side of the trapezoidal plate has a curvature that conforms to the curvature of the inner surface of the drill rod.
The working principle is as follows: firstly screwing the inner connecting body into the drill rod, then rotating the trapezoidal plate around the fixed rod to the middle of the coal-rock dual-purpose diamond drill bit, then penetrating the trapezoidal plate and the fixed rod from the inner connecting body, at the moment, sliding the fixed block into the vertical chute, then moving upwards, after the fixed disk is contacted with the lower surface of the inner connecting body, enabling the third sealing ring and the fourth sealing ring to enter the second connecting groove for pinching, then enabling the fixed block to rotate to the limit position along the annular chute, at the moment, the second spring pushes the top column to enter the second connecting hole, the adjusting ring is pushed upwards, the adjusting ring drives the movable plate to slide in the sliding hole, the movable plate overcomes the action of the first spring to drive the connecting rod to move upwards, enabling the hook groove to hook the fixed ring, then loosening the adjusting ring, the first spring pulls the movable plate downwards, and further enabling the hook groove to drive the fixed, the lower surface of trapezoidal board and the upper surface contact of in-connection body make the fixed rod have an ascending pulling force to the dual-purpose diamond bit of coal petrography, reach the conical plate messenger when rivers, can make the conical plate push down, and then make the fixed rod more reliable to the pulling force that makes progress of the dual-purpose diamond bit of coal petrography, when dismantling, can through the reverse motion of above-mentioned motion.
(III) advantageous effects
The invention provides a dual-purpose diamond geological drill bit convenient to install. The method has the following beneficial effects:
1. according to the invention, the internal connecting body is firstly connected with the drill rod, and then the coal-rock dual-purpose diamond drill bit is connected with the internal connecting body, so that the drill rod is basically not damaged when the coal-rock dual-purpose diamond drill bit is dismounted, and the service life of the drill rod is indirectly prolonged.
2. According to the invention, the hook groove of the connecting rod hooks the fixing ring of the trapezoidal plate to provide an upward pulling force for the fixing rod, the pulling force is greater for the fixing rod after the water flow and the conical plate act, so that the fixing block is tightly clamped in the annular sliding groove, meanwhile, the annular sliding groove blocks the fixing block from further rotating, the top column is clamped between the two connecting holes, and the internal connecting body and the coal-rock dual-purpose diamond drill bit form a whole, so that the connection is very reliable, the dismounting process is consistent with the mounting process, and the mounting process is very convenient.
3. According to the invention, through the sealing pipe and the four sealing rings, water can be ensured not to flow out when water passes through the inner connecting body from the drill rod and then reaches the diamond bit for coal and rock.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a top view of the junction of the trapezoidal plate and the tapered plate of the present invention;
FIG. 3 is a top view of a dual-purpose diamond drill bit for holding disks and coal and rock according to the present invention;
FIG. 4 is a bottom view of the inner connecting body of the present invention;
FIG. 5 is a side view of the connecting rod and the movable plate of the present invention;
FIG. 6 is a longitudinal sectional view of the inner connection body of the present invention;
FIG. 7 is a cross-sectional view of an interconnector of the present invention.
Wherein, 1, a drill rod; 2. a sealing tube; 3. a connecting rod; 4. an inner connecting body; 5. a first seal ring; 6. an adjusting ring; 7. a movable plate; 8. a second seal ring; 9. a first spring; 10. a sliding port; 11. a diamond bit for coal and rock; 12. a second spring; 13. a first connection hole; 14. a third seal ring; 15. a fourth seal ring; 16. a top pillar; 17. a fixed block; 18. fixing the rod; 19. a tapered plate; 20. a trapezoidal plate; 21. a fixing ring; 22. fixing the disc; 23. a vertical chute; 24. a second connection hole; 25. hooking a groove; 26. an annular chute.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1 to 7, an embodiment of the present invention provides a dual-purpose diamond geological drill bit convenient for installation, which includes a drill rod 1 and a dual-purpose diamond drill bit 11 for coal and rock, a fixed disc 22 is fixedly connected to an outer surface of the dual-purpose diamond drill bit 11 for coal and rock, the dual-purpose diamond drill bit 11 for coal and rock can be driven to rotate after the fixed disc 22 is rotated, a fixed block 17 is fixedly connected to the outer surface of the dual-purpose diamond drill bit 11 for coal and rock and located above the fixed disc 22, and is slidably connected to a vertical chute 23 or an annular chute 26, a fixed rod 18 is fixedly connected to an upper end surface of the dual-purpose diamond drill bit 11 for coal and rock, and is used for driving a trapezoidal plate 20 and a connecting structure thereof to move, one end of the fixed rod 18 far away from the dual-purpose diamond drill bit 11 for coal and rock is rotatably connected to a trapezoidal plate 20, the upper surface of the fixed disk 22 is provided with two first connecting grooves, the two first connecting grooves are respectively provided with a third sealing ring 14 and a fourth sealing ring 15, the two first connecting grooves are movably connected with two second connecting grooves on the lower surface of the inner connecting body 4, the upper surface of the fixed disk 22 is provided with a first connecting hole 13 between the two first connecting grooves, the inner surface of the first connecting hole 13 is slidably connected with a top column 16, a second spring 12 is fixedly connected between the top column 16 and the inner bottom surface of the first connecting hole 13 and used for pushing the top column 16 to move upwards, the inner surface of the drill rod 1 is in threaded connection with the inner connecting body 4, the side wall of the inner connecting body 4 is provided with a sliding port 10, the inside of the sliding port 10 is slidably connected with a movable plate 7 which can drive the connecting rod 3 to move upwards and downwards, a first spring 9 is fixedly connected between the lower surface of the movable plate 7 and, the inner side surface of the movable plate 7, which is far away from the sliding opening 10 and is positioned on the outer surface of the inner connecting body 4, is fixedly connected with an adjusting ring 6 for driving the movable plate 7 to move up and down along the sliding opening 10, the inner side surface of the adjusting ring 6 is provided with a first sealing ring 5 and a second sealing ring 8 for sealing two sides of the sliding opening 10, the upper surface of the movable plate 7 is fixedly connected with a connecting rod 3, one end of the connecting rod 3, which is far away from the adjusting ring 6, is provided with a hook groove 25, the hook groove 25 is slidably connected with a fixing ring 21, so that the conical plate 19 and the trapezoidal plate 20 are abutted against the inner wall of the inner connecting body 4, a sealing pipe 2 is arranged inside the inner connecting body 4 for sealing the connecting rod 3 and the inner connecting body 4, the connecting rod 3 is slidably connected with the sealing pipe 2, the inner side surface of the inner connecting body 4 is provided with an annular chute, the vertical chute 23 is connected to one end of an annular chute 26.
The third seal ring 14 is located at the inner side of the fourth seal ring 15, and the third seal ring 14 and the fourth seal ring 15 both extend out of the upper surface of the fixed disc 22.
The outer surface of the inner coupling body 4 outside the engagement with the drill rod 1 is not threaded and the adjusting ring 6 is slidably connected to the outer surface of the lower part of the inner coupling body 4.
The first sealing ring 5 is located above the second sealing ring 8, and the first sealing ring 5 is located above the movable plate 7.
The lower surface of the inner connecting body 4 is provided with two second connecting grooves and a row of second connecting holes 24, and the second connecting holes 24 are located between the two second connecting grooves.
The maximum curvature of the conical plate 19 is consistent with the curvature of the inner surface of the drill rod 1, so that the conical plate and the drill rod are convenient to fit.
The end of the top pillar 16 far away from the second spring 12 and the upper end face of the second connecting hole 24 are both hemispherical, the top pillar 16 can be connected with the second connecting hole 24 in a sliding manner, and after the end of the top pillar 16 slides into the second connecting hole 24, the fixed disc 22 and the inner connecting body 4 cannot rotate relatively, so that the two can be attached conveniently.
The curvature of the right side of the trapezoidal plate 20 conforms to the curvature of the inner surface of the drill rod 1.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a dual-purpose diamond geological drill bit convenient to installation, includes drilling rod (1) and dual-purpose diamond drill bit of coal petrography (11), its characterized in that: the outer fixed surface of the dual-purpose diamond bit (11) of coal rock is connected with a fixed disk (22), the outer surface of the dual-purpose diamond bit (11) of coal rock is fixedly connected with a fixed block (17) and is positioned above the fixed disk (22), the upper end face of the dual-purpose diamond bit (11) of coal rock is fixedly connected with a fixed rod (18), one end of the fixed rod (18) far away from the dual-purpose diamond bit (11) of coal rock is rotatably connected with a trapezoidal plate (20), the upper side face of the trapezoidal plate (20) is fixedly connected with a conical plate (19), the front side face of the trapezoidal plate (20) is fixedly connected with a fixed ring (21), the upper surface of the fixed disk (22) is provided with two first connecting grooves, two first connecting grooves are respectively provided with a third sealing ring (14) and a fourth sealing ring (15), the upper surface of the fixed disk (22) is positioned between the two first connecting grooves and is provided with a, the inner surface of the first connecting hole (13) is connected with a top column (16) in a sliding manner, a second spring (12) is fixedly connected between the top column (16) and the inner bottom surface of the first connecting hole (13), the inner surface of the drill rod (1) is connected with an inner connecting body (4) in a threaded manner, the side wall of the inner connecting body (4) is provided with a sliding port (10), the inner part of the sliding port (10) is connected with a movable plate (7) in a sliding manner, a first spring (9) is fixedly connected between the lower surface of the movable plate (7) and the sliding port (10), one side of the movable plate (7) far away from the sliding port (10) is fixedly connected with an adjusting ring (6) on the outer surface of the inner connecting body (4), the inner side surface of the adjusting ring (6) is provided with a first sealing ring (5) and a second sealing ring (8), and the upper surface of the movable plate, the one end that adjustable ring (6) was kept away from in connecting rod (3) is provided with colludes groove (25), collude groove (25) and solid fixed ring (21) sliding connection, the inside of in-connection body (4) is provided with sealed tube (2), connecting rod (3) and sealed tube (2) sliding connection, the medial surface of in-connection body (4) is provided with annular spout (26), the medial surface of in-connection body (4) is provided with vertical spout (23), vertical spout (23) are connected with the one end of annular spout (26).
2. A dual-purpose diamond earth-boring bit as claimed in claim 1, wherein: the third sealing ring (14) is located on the inner side of the fourth sealing ring (15), and the third sealing ring (14) and the fourth sealing ring (15) extend out of the upper surface of the fixed disc (22).
3. A dual-purpose diamond earth-boring bit as claimed in claim 1, wherein: the outer surface of the inner connecting body (4) outside the meshing part of the drill rod (1) is not provided with threads, and the adjusting ring (6) is connected with the outer surface of the lower part of the inner connecting body (4) in a sliding way.
4. A dual-purpose diamond earth-boring bit as claimed in claim 1, wherein: the first sealing ring (5) is located above the second sealing ring (8), and the first sealing ring (5) is located above the movable plate (7).
5. A dual-purpose diamond earth-boring bit as claimed in claim 1, wherein: the lower surface of the inner connecting body (4) is provided with two second connecting grooves and a row of second connecting holes (24), and the second connecting holes (24) are located between the two second connecting grooves.
6. A dual-purpose diamond earth-boring bit as claimed in claim 1, wherein: the maximum curvature of the conical plate (19) corresponds to the curvature of the inner surface of the drill rod (1).
7. A dual-purpose diamond earth-boring bit as claimed in claim 1, wherein: the top column (16) is far away from one end of the second spring (12) and the upper end face of the second connecting hole (24) and is hemispherical, and the top column (16) can be connected with the second connecting hole (24) in a sliding mode.
8. A dual-purpose diamond earth-boring bit as claimed in claim 1, wherein: the curvature of the right side surface of the trapezoidal plate (20) is consistent with the curvature of the inner surface of the drill rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010917302.0A CN112211561A (en) | 2020-09-03 | 2020-09-03 | Dual-purpose diamond geological drill bit convenient to installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010917302.0A CN112211561A (en) | 2020-09-03 | 2020-09-03 | Dual-purpose diamond geological drill bit convenient to installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211561A true CN112211561A (en) | 2021-01-12 |
Family
ID=74049055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010917302.0A Pending CN112211561A (en) | 2020-09-03 | 2020-09-03 | Dual-purpose diamond geological drill bit convenient to installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211561A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430990A (en) * | 2022-09-29 | 2022-12-06 | 祁东县锋速钻探工具有限公司 | Bionic diamond-impregnated bit base body welding and fixing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207004432U (en) * | 2017-08-11 | 2018-02-13 | 长江大学 | A kind of petroleum geology exploitation drill bit |
| CN209523711U (en) * | 2018-12-25 | 2019-10-22 | 湖北大好工具有限公司 | A kind of dual-purpose type diamond core bit being easily installed |
| CN110552631A (en) * | 2019-10-24 | 2019-12-10 | 烟台华士石油机械有限公司 | Drilling bit capable of being quickly disassembled and assembled |
| CN209990446U (en) * | 2019-01-23 | 2020-01-24 | 大好(天津)超硬材料制品有限公司 | Combined diamond geological drill bit |
| CN110778274A (en) * | 2019-11-28 | 2020-02-11 | 陕西延长石油（集团）有限责任公司 | Drill bit for petroleum geological exploration and installation method |
-
2020
- 2020-09-03 CN CN202010917302.0A patent/CN112211561A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207004432U (en) * | 2017-08-11 | 2018-02-13 | 长江大学 | A kind of petroleum geology exploitation drill bit |
| CN209523711U (en) * | 2018-12-25 | 2019-10-22 | 湖北大好工具有限公司 | A kind of dual-purpose type diamond core bit being easily installed |
| CN209990446U (en) * | 2019-01-23 | 2020-01-24 | 大好(天津)超硬材料制品有限公司 | Combined diamond geological drill bit |
| CN110552631A (en) * | 2019-10-24 | 2019-12-10 | 烟台华士石油机械有限公司 | Drilling bit capable of being quickly disassembled and assembled |
| CN110778274A (en) * | 2019-11-28 | 2020-02-11 | 陕西延长石油（集团）有限责任公司 | Drill bit for petroleum geological exploration and installation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430990A (en) * | 2022-09-29 | 2022-12-06 | 祁东县锋速钻探工具有限公司 | Bionic diamond-impregnated bit base body welding and fixing device |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210112 |
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| RJ01 | Rejection of invention patent application after publication |