CN109236189A - A kind of downhole drill reamer - Google Patents
A kind of downhole drill reamer Download PDFInfo
- Publication number
- CN109236189A CN109236189A CN201811242373.4A CN201811242373A CN109236189A CN 109236189 A CN109236189 A CN 109236189A CN 201811242373 A CN201811242373 A CN 201811242373A CN 109236189 A CN109236189 A CN 109236189A
- Authority
- CN
- China
- Prior art keywords
- piston
- wing
- outer cylinder
- indexing mechanism
- central tube
- 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
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development 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
- E21B10/26—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
- E21B10/322—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 cutter shifted by fluid pressure
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of downhole drill reamers, including top connection, ontology and lower contact.The top connection is threadedly attached in ontology upper end, lower contact is threadedly attached in ontology lower end, when cleaner for high-pressure drilling fluid enters in the cavity between indexing mechanism upper end and lower piston b from central tube lower part circumferential direction aperture, under drilling liquid pressure effect, indexing mechanism is opened and is moved down, drilling fluid is set to reach the lower end lower piston a from the circumferential aperture of central tube, upper piston a is pushed to move upwards, and then wing is pushed to be turned out around pin b, wing is unfolded, then under the turning effort of drill string, wing obtains a sufficiently large torque, to carry out reaming hole operation.A kind of downhole drill reamer of the invention is able to carry out reaming while drilling, promotes drilling efficiency, is suitable for development reaming hole operation in the case where hole shrinkage, hole anomaly or setting of casing circumferential direction narrow space.
Description
Technical field
The present invention relates to a kind of downhole drill reamers for oil and gas exploitation, are especially adapted for use in wellbore contracting
Situations such as diameter, hole anomaly or setting of casing circumferential direction narrow space.
Background technique
In the exploitation drilling process of petroleum gas, the depth of drilling well is gradually deepened, and drilling well faces more and more multiple
Miscellaneous casing programme and bad ground structure, the problem of encountering, also become increasingly complex.Since the borehole wall is unstable and it is former to be squeezed etc. by stratum
Cause is frequently encountered borehole diameter diminution, and drilling process is led to problems such as to be difficult to continue to reduce with horizontal hole.Conventional method
Prolonged reaming operation can only be carried out in drilling process or when making a trip, and have reached removal undergauge and repair the purpose of wall,
This can expend a large amount of human and material resources and time.Therefore, in the prior art, need to carry out reaming hole operation using reamer.It should
Tool is generally used for boring the easy tiltedly stratum with easy undergauge, and reaming hole can be carried out while oil/gas drilling.
In petroleum casing pipe Completion Operations, Open-Hole Section size directly influences whether well cementing casing pipe can be lowered into
Position, by the reaming to Open-Hole Section, the smooth tripping in of casing can be made by increasing Open-Hole Section diameter.In the complete well of lower gravel filling
In, by increasing the diameter of Open-Hole Section, gravel pack volume is increased, can be improved total completion time.Increase the diameter of Open-Hole Section
Cementing concrete ring diameter can also be increased, improve cementing quality.It can be seen that the diameter for increasing Open-Hole Section is one in drilling process
Critically important work, a kind of special tool of this need of work are completed, that is, reamer.Currently, reamer exists
The deficiency of service fee height, reaming hole low efficiency and job security difference etc., in order to improve the safety of underreamer operation
Property and stability, research and development Novel hole reaming device be inevitable developing direction.So further research reamer is for improving China
It oil-gas mining efficiency and reduces cost etc. and has a very big significance.
Summary of the invention
It solves described in background technology in oil and gas development drilling process to explore, is lifted at easily tiltedly with easy undergauge
Production efficiency when layer drilling well, the present invention provides a kind of downhole drill reamers.When reamer of the invention works, high pressure is bored
Well liquid enters in the cavity between indexing mechanism upper end and lower piston b from the uniformly distributed circumferential aperture in central tube lower part 4, is boring
Under the action of well liquid pressure, indexing mechanism is turned on and moves down, and enables circumferential aperture of the cleaner for high-pressure drilling fluid from central tube
The lower end lower piston a is reached, then upper piston a is pushed to move up, pushes wing that can be turned out around pin b, wing exhibition
It opens.Under the turning effort of drill string, wing obtains a sufficiently large torque, starts reaming hole operation.
The technical scheme is that a kind of downhole drill reamer includes top connection, ontology, lower contact, on
Connector is threadedly attached in ontology upper end, and ontology lower end has been connected through a screw thread lower contact, in outer cylinder upper end and top connection
Anti-lost ring is installed, anti-lost ring under being equipped between outer cylinder lower end and the upper end of lower contact between lower end；The ontology packet
Include outer cylinder, upper end spring, upper piston, lower piston a, lower piston b, pin a, lower end spring, under anti-lost ring, O-ring seal a, side
Port valve, indexing mechanism, O-ring seal b, nozzle, O-ring seal c, pin b, wing, O-ring seal d and central tube, in
On heart pipe, it is sequentially installed with anti-lost ring, upper end spring, upper piston, lower piston a, lower piston b, indexing mechanism from top to bottom；Knife
The wing is controlled to the outer cylinder by pin b, and between upper piston and lower piston a, wing can be around for the switching controlling part position of wing
Pin b rotation；Outer cylinder is fixed together with lower piston b by pin a, and the end pin a extend into indexing mechanism outer wall groove
It is interior, control the extreme displacement of indexing mechanism, indexing mechanism lower part and under be provided with lower end spring between anti-lost ring；In ontology
Upper and lower part is fitted with by-passing valve inside and outside wall passway；On outer cylinder, between lower piston a and lower piston b at hydraulic cavities
It is provided with nozzle；When the reamer works, cleaner for high-pressure drilling fluid enters on indexing mechanism from the circumferential aperture of central tube lower part
In cavity between end and lower piston b, under the action of drilling liquid pressure, indexing mechanism is opened and is moved down, so that drilling well
Liquid can reach the lower end lower piston a from the circumferential aperture of central tube, then upper piston a is pushed to move up, push wing can
It is turned out around pin b, wing expansion；When reamer stops reaming hole, using the drilling fluid being routinely pumped, indexing mechanism exists
It is moved up under the action of the spring force of lower end, closes drilling fluid from central tube circumferential direction aperture to the channel of the lower end lower piston a, turn
Position mechanism closes, drilling liquid pressure between upper piston upper end and upper anti-lost ring and under the collective effect of upper end spring force,
It pushes wing inwardly to rotate around pin b, while lower piston a is moved down, withdraws wing, reamer resets；The wing is adopted
With double toothing, chip space, and the interlaced distribution of two toothrows are opened up in its center；4 are circumferentially evenly distributed in central tube lower part
A aperture；3 by-passing valves are all evenly distributed in the top of outer cylinder and lower part；4 nozzles are evenly distributed on outer cylinder circumference in 90 °；3
Wing is evenly distributed on outer cylinder circumference in 120 °.
It is controlled the beneficial effects of the present invention are: (1) reamer is opened and closed using indexing mechanism, control efficiency is high, anti-
Rapid, job stability height is answered, and when without reaming hole operation, indexing mechanism can play position-limiting action, and piston is allowed to enter
Mouth remains off；(2) system top and bottom end are both provided with falling-proof apparatus, guarantee that the system of system in the event of a failure is steady
Property, prevent part from falling shaft bottom；(3) wing uses double toothing, opens up chip space in its center, and two toothrows are mutually handed over
Mistake distribution, is conducive to reaming hole operation and chip removal.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of lower piston b.
Fig. 3 is the structural schematic diagram of indexing mechanism.
Fig. 4 is the structural schematic diagram of wing.
1. top connection in figure, anti-lost ring on 2., 3. outer cylinders, 4. upper end springs, 5. upper pistons, 6. lower piston a, 7. lower pistons
B, 8. pin a, 9. lower end springs, anti-lost ring under 10., 11. lower contacts, 12.O type sealing ring a, 13. by-passing valves, 14. indexing machines
Structure, 15.O type sealing ring b, 16. nozzles, 17.O type sealing ring c, 18. pin b, 19. wings, 20.O type sealing ring d, 21. centers
Pipe.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Referring to attached drawing 1, a kind of downhole drill reamer includes top connection 1, ontology, lower contact 11, and top connection 1 passes through screw thread
It is connected to ontology upper end, ontology lower end has been connected through a screw thread lower contact 11, between 3 upper end of outer cylinder and the lower end of top connection 1
Anti-lost ring 2 is installed, anti-lost ring 10 under being equipped between 3 lower end of outer cylinder and the upper end of lower contact 11；The ontology includes
Outer cylinder 3, upper end spring 4, upper piston 5, lower piston a6, lower piston b7, pin a8, lower end spring 9, under anti-lost ring 10, O-shaped sealing
Enclose a12, by-passing valve 13, indexing mechanism 14, O-ring seal b15, nozzle 16, O-ring seal c17, pin b18, wing 19, O-shaped
Sealing ring d20 and central tube 21 are sequentially installed with anti-lost ring 2, upper end spring 4, upper work on central tube 21 from top to bottom
Fill in 5, lower piston a6, lower piston b7, indexing mechanism 14；Wing 19 is connected on outer cylinder 3 by pin b18, the switch of wing 19
Controlling position is placed between upper piston 5 and lower piston a6, and wing 19 can be rotated around pin b18；Outer cylinder 3 passes through with lower piston b7
Pin a8 is fixed together, and the end pin a8 is extend into 14 outer wall groove of indexing mechanism, controls the limit of indexing mechanism 14
Displacement；Indexing mechanism 14 lower part and under be provided with lower end spring 9 between anti-lost ring 10；Inside and outside 3 upper and lower part of outer cylinder
By-passing valve 13 is fitted at wall passway；On outer cylinder 3, nozzle is provided at hydraulic cavities between lower piston a6 and lower piston b7
16.The wing 19 uses double toothing, opens up chip space, and the interlaced distribution of two toothrows in its center；At center
21 lower part of pipe is circumferentially evenly distributed with 4 apertures；3 by-passing valves 13 are all evenly distributed in the top of outer cylinder 3 and lower part；4 nozzles 16 are equal in 90 °
It is even to be distributed on 3 circumference of outer cylinder；3 wings 19 are evenly distributed on 3 circumference of outer cylinder in 120 °.
When the reamer works, cleaner for high-pressure drilling fluid enters 14 upper end of indexing mechanism from the circumferential aperture of 21 lower part of central tube
In cavity between lower piston b7, under the action of drilling liquid pressure, indexing mechanism 14 is opened and is moved down, so that drilling well
Liquid can reach the lower end lower piston a6 from the circumferential aperture of central tube 21, then upper piston a6 is pushed to move up, push wing
19 can be turned out around pin b18, and wing 19 is unfolded；When reamer stops reaming hole, using the drilling fluid being routinely pumped,
Indexing mechanism 14 moves up under the action of 9 elastic force of spring of lower end, closes drilling fluid from the circumferential aperture of central tube 21 to lower work
The channel of the lower end a6 is filled in, indexing mechanism 14 is closed, drilling liquid pressure and upper end between 5 upper end of upper piston and upper anti-lost ring 2
It under the collective effect of 4 elastic force of spring, pushes wing 19 inwardly to rotate around pin b18, while lower piston a6 is moved down, withdraws
Wing 19, reamer reset.
Claims (3)
1. a kind of downhole drill reamer, it is characterised in that: a kind of downhole drill reamer includes top connection (1), sheet
Body, lower contact (11), top connection (1) are threadedly attached in ontology upper end, and ontology lower end has been connected through a screw thread lower contact
(11), upper anti-lost ring (2) is installed between outer cylinder (3) upper end and the lower end of top connection (1), is connect under in outer cylinder (3) lower end
Anti-lost ring (10) are installed down between the upper end of head (11)；The ontology include outer cylinder (3), upper end spring (4), upper piston (5),
Lower piston a (6), lower piston b (7), pin a (8), lower end spring (9), under anti-lost ring (10), O-ring seal a (12), by-passing valve
(13), indexing mechanism (14), O-ring seal b (15), nozzle (16), O-ring seal c (17), pin b (18), wing (19), O
Type sealing ring d (20) and central tube (21) are sequentially installed with anti-lost ring (2), upper end on central tube (21) from top to bottom
Spring (4), upper piston (5), lower piston a (6), lower piston b (7), indexing mechanism (14), wing (19) are connected by pin b (18)
It connects on outer cylinder (3), between upper piston (5) and lower piston a (6), wing (19) can for the switching controlling part position of wing (19)
It is rotated around pin b (18)；Outer cylinder (3) is fixed together with lower piston b (7) by pin a (8), pin a (8) end
Extend into indexing mechanism (14) outer wall groove, control indexing mechanism (14) extreme displacement, indexing mechanism (14) lower part with
Under be provided with lower end spring (9) between anti-lost ring (10)；Side is fitted at outer cylinder (3) upper and lower part inside and outside wall passway
Port valve (13)；On outer cylinder (3), nozzle (16) are provided at hydraulic cavities between lower piston a (6) and lower piston b (7).
2. a kind of downhole drill reamer according to claim 1, it is characterised in that: high when the reamer works
Pressure drilling fluid enters the cavity between indexing mechanism (14) upper end and lower piston b (7) from the circumferential aperture of central tube (21) lower part
In, under the action of drilling liquid pressure, indexing mechanism (14), which is opened, simultaneously to be moved down, and enables drilling fluid from central tube (21)
Circumferential aperture reach lower piston a (6) lower end, then upper piston a (6) is pushed to move up, pushes wing (19) can be around
Pin b (18) is turned out, wing (19) expansion；When reamer stops reaming hole, the drilling fluid being routinely pumped, indexing machine are used
Structure (14) moves up under the action of lower end spring (9) elastic force, closes drilling fluid from the circumferential aperture of central tube (21) to lower work
The channel of a (6) lower end is filled in, indexing mechanism (14) is closed, the drilling hydraulic between upper piston (5) upper end and upper anti-lost ring (2)
Under power and the collective effect of upper end spring (4) elastic force, wing (19) are pushed inwardly to rotate around pin b (18), while lower piston a
(6) it moves down, withdraws wing (19), reamer resets.
3. a kind of downhole drill reamer according to claim 1, it is characterised in that: wing (19) uses double rows of teeth knot
Structure opens up chip space, and the interlaced distribution of two toothrows in its center；4 apertures are circumferentially evenly distributed in central tube (21) lower part；
3 by-passing valves (13) are all evenly distributed in the top of outer cylinder (3) and lower part；4 nozzles (16) are evenly distributed on outer cylinder (3) circle in 90 °
Zhou Shang；3 wings (19) are evenly distributed on outer cylinder (3) circumference in 120 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811242373.4A CN109236189B (en) | 2018-10-24 | 2018-10-24 | Underground reamer while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811242373.4A CN109236189B (en) | 2018-10-24 | 2018-10-24 | Underground reamer while drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109236189A true CN109236189A (en) | 2019-01-18 |
| CN109236189B CN109236189B (en) | 2020-04-21 |
Family
ID=65081707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811242373.4A Active CN109236189B (en) | 2018-10-24 | 2018-10-24 | Underground reamer while drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109236189B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206512A (en) * | 2019-06-24 | 2019-09-06 | 西南石油大学 | Flexible contact type internal surface of sleeve pipe burnisher |
| CN110656888A (en) * | 2019-09-30 | 2020-01-07 | 西南石油大学 | Hydraulic-excitation telescopic controllable type reamer while drilling |
| CN112196468A (en) * | 2020-10-15 | 2021-01-08 | 东北石油大学 | Hydraulic drive reaming while drilling tool |
| CN113153162A (en) * | 2021-04-28 | 2021-07-23 | 深圳新速通石油工具有限公司 | Non-pitching free telescopic type reamer while drilling |
| CN113585977A (en) * | 2021-08-30 | 2021-11-02 | 四川万吉金刚石钻头有限公司 | Expanding drill bit |
| CN115506727A (en) * | 2022-11-08 | 2022-12-23 | 大庆市璞庆钻采设备制造有限公司 | Diameter-variable drilling tool stabilizer |
| CN117823049A (en) * | 2023-12-27 | 2024-04-05 | 中国石油天然气集团有限公司 | Reaming device and drilling equipment |
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| GB2352747A (en) * | 1999-07-27 | 2001-02-07 | Baker Hughes Inc | Reusable cutting and milling tool |
| CN201567961U (en) * | 2009-12-16 | 2010-09-01 | 中国石油天然气股份有限公司 | Hydraulic variable-diameter reaming device while drilling |
| CN201843524U (en) * | 2010-11-04 | 2011-05-25 | 中国石油天然气集团公司 | Full hydraulic reamer |
| CN104929524A (en) * | 2014-03-22 | 2015-09-23 | 王传伟 | Tool for enlarging wellbore diameter |
| CN205858185U (en) * | 2016-06-20 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of hydraulic reamer and withdrawer |
| CN107218007A (en) * | 2017-08-02 | 2017-09-29 | 西南石油大学 | Rack pinion realizes the reducing hydraulic cutter of continuous cutting different-diameter sleeve pipe |
| CN107387011A (en) * | 2017-08-02 | 2017-11-24 | 西南石油大学 | Waterpower promotes the downhole tool for realizing continuous cutting different-diameter sleeve pipe |
-
2018
- 2018-10-24 CN CN201811242373.4A patent/CN109236189B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2352747A (en) * | 1999-07-27 | 2001-02-07 | Baker Hughes Inc | Reusable cutting and milling tool |
| CN201567961U (en) * | 2009-12-16 | 2010-09-01 | 中国石油天然气股份有限公司 | Hydraulic variable-diameter reaming device while drilling |
| CN201843524U (en) * | 2010-11-04 | 2011-05-25 | 中国石油天然气集团公司 | Full hydraulic reamer |
| CN104929524A (en) * | 2014-03-22 | 2015-09-23 | 王传伟 | Tool for enlarging wellbore diameter |
| CN205858185U (en) * | 2016-06-20 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of hydraulic reamer and withdrawer |
| CN107218007A (en) * | 2017-08-02 | 2017-09-29 | 西南石油大学 | Rack pinion realizes the reducing hydraulic cutter of continuous cutting different-diameter sleeve pipe |
| CN107387011A (en) * | 2017-08-02 | 2017-11-24 | 西南石油大学 | Waterpower promotes the downhole tool for realizing continuous cutting different-diameter sleeve pipe |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206512A (en) * | 2019-06-24 | 2019-09-06 | 西南石油大学 | Flexible contact type internal surface of sleeve pipe burnisher |
| CN110656888A (en) * | 2019-09-30 | 2020-01-07 | 西南石油大学 | Hydraulic-excitation telescopic controllable type reamer while drilling |
| CN110656888B (en) * | 2019-09-30 | 2020-07-28 | 西南石油大学 | Hydraulic-excitation telescopic controllable type reamer while drilling |
| CN112196468A (en) * | 2020-10-15 | 2021-01-08 | 东北石油大学 | Hydraulic drive reaming while drilling tool |
| CN113153162A (en) * | 2021-04-28 | 2021-07-23 | 深圳新速通石油工具有限公司 | Non-pitching free telescopic type reamer while drilling |
| CN113153162B (en) * | 2021-04-28 | 2024-02-27 | 深圳新速通石油工具有限公司 | Non-ball-throwing free telescopic reamer while drilling |
| CN113585977A (en) * | 2021-08-30 | 2021-11-02 | 四川万吉金刚石钻头有限公司 | Expanding drill bit |
| CN115506727A (en) * | 2022-11-08 | 2022-12-23 | 大庆市璞庆钻采设备制造有限公司 | Diameter-variable drilling tool stabilizer |
| CN115506727B (en) * | 2022-11-08 | 2023-04-07 | 大庆市璞庆钻采设备制造有限公司 | Diameter-variable drilling tool stabilizer |
| CN117823049A (en) * | 2023-12-27 | 2024-04-05 | 中国石油天然气集团有限公司 | Reaming device and drilling equipment |
| CN117823049B (en) * | 2023-12-27 | 2024-09-10 | 中国石油天然气集团有限公司 | Reaming device and drilling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109236189B (en) | 2020-04-21 |
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Effective date of registration: 20220919 Address after: Room 1413, Building 7, Xinghu 101 Plaza, No. 1101 Xinghu Avenue, Development Zone, Nantong City, Jiangsu Province, 226000 Patentee after: Nantong Xieming Technology Co.,Ltd. Address before: 610500, Xindu Avenue, Xindu District, Sichuan, Chengdu, 8 Patentee before: SOUTHWEST PETROLEUM University |
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Effective date of registration: 20240522 Address after: 717600 Yushuping, Wuqi County, Yan'an City, Shaanxi Province Patentee after: Wuqi Jianming Industry and Trade Co.,Ltd. Country or region after: China Address before: Room 1413, Building 7, Xinghu 101 Plaza, No. 1101 Xinghu Avenue, Development Zone, Nantong City, Jiangsu Province, 226000 Patentee before: Nantong Xieming Technology Co.,Ltd. Country or region before: China |