CN107701151A - A kind of method of directional drilling decompression extraction gas hydrates - Google Patents
A kind of method of directional drilling decompression extraction gas hydrates Download PDFInfo
- Publication number
- CN107701151A CN107701151A CN201711148285.3A CN201711148285A CN107701151A CN 107701151 A CN107701151 A CN 107701151A CN 201711148285 A CN201711148285 A CN 201711148285A CN 107701151 A CN107701151 A CN 107701151A
- Authority
- CN
- China
- Prior art keywords
- extraction
- drilling
- hydrate
- recovery well
- directional drilling
- 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 58
- 238000000605 extraction Methods 0.000 title claims abstract description 47
- 150000004677 hydrates Chemical class 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000006837 decompression Effects 0.000 title claims description 14
- 238000011084 recovery Methods 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims description 26
- 239000004576 sand Substances 0.000 claims description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000003345 natural gas Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000008239 natural water Substances 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 5
- 239000011435 rock Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- 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
- E21B7/04—Directional drilling
- E21B7/043—Directional drilling for underwater installations
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of method of directional drilling extraction gas hydrates；This method after hydrate layer occurrence condition is destroyed, is handled the hydrate extraction after decomposition to offshore production platform using extraction equipment by arranging that drill site is oriented drilling to gas hydrates layer in seabed.This method technical operation is simple and reliable, can adapt to different hydrate layer geological conditions, increases hydrate productive area, improve yield and recovery ratio, have a good application prospect.
Description
Technical field
The present invention relates to exploitation sea bed gas hydrate technical field, more particularly to a kind of directional drilling decompression extraction day
The method of right gas hydrate.
Background technology
Natural gas hydrate resources are primarily present in worldwide ditch basin body system, Lu Po systems, marginal basin continental margin,
So far at the whole world discovery gas hydrates place of production is more than 230, hemihydrate content is approximately 2.1 × 1016m3, it is therein always to have
Machine carbon (TOC) total amount be coal, twice of oil and natural gas summation.Therefore, in the exhaustion increasingly of the global conventional gas and oil energy
In the case of, the exploitation of gas hydrates seems more urgent with utilizing.
Current natural gas hydrate exploitation mainly include heat injection exploitation, decompression exploitation, chemical injection exploitation, replacement exploitation and
Five kinds of solids production, wherein decompression exploitation is most widely used and obtains the successful recovery method of pilot production.Decompression exploitation side at present
Fado is to be covered with natural gas reservoir under selection hydrate layer or be easy under conditions of artificially manufacturing air bag, and recovery well is directly drilled into gas
In body layer or air bag, break hydrate preservation stable condition, hydrate exploitation is carried out using its own decomposability.This method one
Aspect is needed to select suitable gas hydrates preservation stratum, and production zone is restricted；On the other hand, recovery well arrangement limit
Extraction scope has been made, has been also easy to cause the problems such as blocking recovery well of shaking out.
The content of the invention
To solve the above problems, the present invention provides a kind of method of directional drilling decompression extraction gas hydrates, in skill
Art is realized and adapts to different hydrate layer geological conditions, increase hydrate productive area, improves on the premise of operation is simple and reliable
The purpose of yield and recovery ratio.
To achieve the above object, the present invention uses following technological means：
1. the present invention provides a kind of method of directional drilling decompression extraction gas hydrates, comprise the following steps：
A. offshore production platform is built on sea level, be disposed with production platform extraction equipment, mixture separation equipment,
Control platform and marine geophysical survey device, recovery well is arranged from production platform to seabed, and recovery well diameter is can put
Put directional drilling machine and reserve certain working space, shaft bottom no longer extends downwardly after being contacted with seabed；
B. directional drilling machine and auxiliary equipment are transferred to recovery well bottom, slush pump and drilling monitor are arranged in offshore production
On platform, using rig to subsea strata inclined drill, and ensure bottom outlet inclination angle be less than 60 °, drilling rod be provided with measurement inserting tube and
Continuous kick-off device, deflecting drilling can be carried out according to desired trajectory；
C. after drilling rod inclination pierces hydrate layer, drilling switchs to horizontal drilling, continues drilling to setting length, drills and complete
Afterwards, high-strength sand control screen is installed into drilling in time, ensures the integrality of drilling, using sealing device by aperture temporarily sealing,
One drainage holes of completion are set；
D. after completing a drainage holes, in circumferencial direction every more times of 45 ° of repeat steps b, c, drill out multiple drillings until
All drainage holes in recovery well are completed, withdraw from directional drilling machine and auxiliary equipment afterwards；
E. extraction pipeline is installed in all hells, connects the extraction equipment on offshore production platform, extraction is flat to exploitation
Platform is mixture that gas and water adulterates a small amount of fine sand, and mixture separates natural gas and water, fine sand after entering separation equipment,
Respectively extraction work is completed from gas outlet and sand, water out discharge；
F. during extraction, hydrate layer situation of change is observed using marine geophysical survey device, reaches certain
After extraction limit, by all drilling permanent closures, extraction equipment is withdrawn from, closes recovery well, complete whole hydrate exploitation work.
Further, in the step a recovery well a diameter of 10m.
Further, the extraction lower end of duct in the step e is drilled into hydrate layer.
Further, in the step e, extraction equipment, gas outlet, sand, water out are provided with pump installation.
Beneficial effects of the present invention：
The present invention destroys gas hydrates occurrence condition by drilling, and promotes its own to decompose, logical by drilling
Road is out separated gas and water, the extraction of fine sand mixture, reaches the purpose to tap natural gas；With conventional buck extraction system phase
Than stronger to hydrate hosting geological condition adaptability, it is not necessary to the presence of special natural gas reservoir or prefabricated air bag；Recovery well with
Hydrate layer is not directly contacted with, and can be greatly reduced the destruction to hydrate layer by the decompression that drills, is easy to the control of exploitation；By
In the presence of sand control screen, the lasting exploitation of natural gas can either be ensured, and can enough avoids the plugging caused by shaking out excessively from showing
As；Drilling uses circumference, can increase hydrate productive area, improves yield and recovery ratio.
Brief description of the drawings
Fig. 1 is the overall well spacing figure of the present invention；
The one borehole that Fig. 2 is the present invention creeps into working method profile；
Fig. 3 is the firing pattern of the present invention；
Fig. 4 is the offshore production working platform sketch of the present invention.
Description of reference numerals：1-offshore production platform, 2-sea water layer, 3-overlying rock, 4-gas hydrates layer,
5-lower rock stratum, 6-high-strength sand control screen, 7-drainage holes, 8-recovery well, 9-extraction pipeline, 10-sealing device, 11-
Drill bit, 12-bit motor, 13-measurement inserting tube, 14-continuous kick-off device, 15-high-pressure water pipe, 16-directional drilling machine,
17-drilling rod, 18-slush pump, 19-drilling monitor, 20-extraction equipment, 21-mixture separation equipment, 22-pump dress
Put, 23-marine geophysical survey device, 24-control platform, 25-gas outlet, 26-sand, water out.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention will be further described.
Embodiment 1：As Figure 1-4, the present embodiment provides a kind of side of directional drilling decompression exploitation of gas hydrate
Method, specifically include following steps：
A. gas hydrates offshore production platform 1 is built on sea level, extraction equipment 20 is disposed with production platform, is mixed
Compound separation equipment 21, control platform 24, marine geophysical survey device 23 etc., sea water layer 2 is passed through to sea from production platform
Base fabric puts recovery well 8, and the diameter of recovery well 8 is taken as 10m, ensures directional drilling machine 16 and auxiliary equipment working space, shaft bottom with it is upper
Rock stratum 3 no longer extends downwardly after contacting；
B. directional drilling machine 16 and auxiliary equipment are transferred to the shaft bottom of recovery well 8, and by slush pump 18 and creeps into the cloth of monitor 19
Put at sea on production platform 1, using directional drilling machine 16 to subsea strata inclined drill, and ensure that bottom outlet inclination angle is less than 60 °, bore
Bar 17 is provided with measurement inserting tube 13 and continuous kick-off device 14, can carry out deflecting drilling according to desired trajectory；
C. after the inclination of drilling rod 17 pierces hydrate layer 4, drilling switchs to horizontal drilling, continues drilling to setting length, drills
After the completion of, high-strength sand control screen 6 is installed into drilling in time, ensures the integrality of drilling, it is using sealing device 10 that aperture is temporary
When seal, complete setting for drainage holes 7；
D. after completing a drainage holes 7, in circumferencial direction every more times of 45 ° of repeat steps b, c, drill out multiple drillings until
All brill drainage holes 7 in recovery well are completed, withdraw from directional drilling machine 16 and auxiliary equipment afterwards；
E. the extraction equipment 20 on all hells installation extraction pipeline 9, connection offshore production platform 1, extraction is to opening
Adopt platform is the mixture that gas and water adulterates a small amount of fine sand, mixture enter after mixture separation equipment 21 by natural gas and water,
Fine sand separates, and is discharged respectively from gas outlet 25 and sand, water out 26, completes extraction work, and extraction lower end of duct bores
Enter to hydrate layer, extraction equipment, gas outlet, sand, water out and be provided with pump installation 22；
F. during extraction, the situation of change of hydrate layer 4 is observed using marine geophysical survey device 23, reaches certain
Extraction limit after, by all permanent closures of drainage holes 7, withdraw from extraction equipment, close recovery well 8, complete whole hydrate and open
Adopt work.
Claims (4)
- A kind of 1. method of directional drilling decompression extraction gas hydrates, it is characterised in that comprise the following steps：A. offshore production platform is built on sea level, extraction equipment, mixture separation equipment, control are disposed with production platform Platform and marine geophysical survey device, recovery well is arranged from production platform to seabed, and recovery well diameter is determined with that can place To rig and certain working space is reserved, shaft bottom no longer extends downwardly after being contacted with seabed；B. directional drilling machine and auxiliary equipment are transferred to recovery well bottom, slush pump and drilling monitor are arranged in offshore production platform On, using rig to subsea strata inclined drill, and ensure that bottom outlet inclination angle is less than 60 °, drilling rod is provided with measurement inserting tube and continuous Kick-off device, deflecting drilling can be carried out according to desired trajectory；C. after drilling rod inclination pierces hydrate layer, drilling switchs to horizontal drilling, continues drilling extremely setting length, after the completion of drilling, High-strength sand control screen is installed into drilling in time, ensures the integrality of drilling, using sealing device by aperture temporarily sealing, is completed One drainage holes are set；D. after completing a drainage holes, in circumferencial direction every more times of 45 ° of repeat steps b, c, multiple drillings are drilled out until completing All drainage holes in recovery well, withdraw from directional drilling machine and auxiliary equipment afterwards；E. extraction pipeline is installed in all hells, connects the extraction equipment on offshore production platform, production platform is arrived in extraction It is the mixture that gas and water adulterates a small amount of fine sand, mixture separates natural gas and water, fine sand after entering separation equipment, respectively Extraction work is completed from gas outlet and sand, water out discharge；F. during extraction, hydrate layer situation of change is observed using marine geophysical survey device, reaches certain extraction After limit, by all drilling permanent closures, extraction equipment is withdrawn from, closes recovery well, complete whole hydrate exploitation work.
- A kind of 2. method of directional drilling decompression extraction gas hydrates according to claim 1, it is characterised in that institute State a diameter of 10m of recovery well in step a.
- A kind of 3. method of directional drilling decompression extraction gas hydrates according to claim 1, it is characterised in that institute The extraction lower end of duct stated in step e is drilled into hydrate layer.
- A kind of 4. method of directional drilling decompression extraction gas hydrates according to claim 1, it is characterised in that institute State in step e, extraction equipment, gas outlet, sand, water out are provided with pump installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711148285.3A CN107701151A (en) | 2017-11-17 | 2017-11-17 | A kind of method of directional drilling decompression extraction gas hydrates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711148285.3A CN107701151A (en) | 2017-11-17 | 2017-11-17 | A kind of method of directional drilling decompression extraction gas hydrates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107701151A true CN107701151A (en) | 2018-02-16 |
Family
ID=61180315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711148285.3A Pending CN107701151A (en) | 2017-11-17 | 2017-11-17 | A kind of method of directional drilling decompression extraction gas hydrates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107701151A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798608A (en) * | 2018-07-26 | 2018-11-13 | 四川宏华石油设备有限公司 | A kind of exploitation of gas hydrates system and method |
| CN115263248A (en) * | 2021-04-30 | 2022-11-01 | 中石化石油工程技术服务有限公司 | Method for exploiting ocean hydrate by double horizontal wells |
| WO2023142553A1 (en) * | 2022-09-26 | 2023-08-03 | 中国科学院广州能源研究所 | System and method for exploiting marine natural gas hydrate resources |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3945809B2 (en) * | 2002-12-25 | 2007-07-18 | 鹿島建設株式会社 | Submarine gas hydrate mining method and system |
| CN101435328A (en) * | 2008-12-15 | 2009-05-20 | 中国地质大学（武汉） | Method and device for exploring seabed gas hydrate |
| CN101672177A (en) * | 2009-09-28 | 2010-03-17 | 中国海洋石油总公司 | Exploitation method for sea bed gas hydrate |
| CN102797447A (en) * | 2012-09-05 | 2012-11-28 | 韩中枢 | Extracting method of land combustible ice and extracting device adopted for same |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN105298463A (en) * | 2015-11-11 | 2016-02-03 | 中国石油大学(华东) | Completion method for natural-gas-hydrate large-borehole and multi-branch-radial-horizontal-borehole well |
| CN105625998A (en) * | 2016-02-02 | 2016-06-01 | 西南石油大学 | Reverse production method and production equipment for seafloor natural gas hydrate stable layer |
-
2017
- 2017-11-17 CN CN201711148285.3A patent/CN107701151A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3945809B2 (en) * | 2002-12-25 | 2007-07-18 | 鹿島建設株式会社 | Submarine gas hydrate mining method and system |
| CN101435328A (en) * | 2008-12-15 | 2009-05-20 | 中国地质大学（武汉） | Method and device for exploring seabed gas hydrate |
| CN101672177A (en) * | 2009-09-28 | 2010-03-17 | 中国海洋石油总公司 | Exploitation method for sea bed gas hydrate |
| CN102797447A (en) * | 2012-09-05 | 2012-11-28 | 韩中枢 | Extracting method of land combustible ice and extracting device adopted for same |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN105298463A (en) * | 2015-11-11 | 2016-02-03 | 中国石油大学(华东) | Completion method for natural-gas-hydrate large-borehole and multi-branch-radial-horizontal-borehole well |
| CN105625998A (en) * | 2016-02-02 | 2016-06-01 | 西南石油大学 | Reverse production method and production equipment for seafloor natural gas hydrate stable layer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798608A (en) * | 2018-07-26 | 2018-11-13 | 四川宏华石油设备有限公司 | A kind of exploitation of gas hydrates system and method |
| CN108798608B (en) * | 2018-07-26 | 2023-12-01 | 四川宏华石油设备有限公司 | Natural gas hydrate exploitation system and method |
| CN115263248A (en) * | 2021-04-30 | 2022-11-01 | 中石化石油工程技术服务有限公司 | Method for exploiting ocean hydrate by double horizontal wells |
| WO2023142553A1 (en) * | 2022-09-26 | 2023-08-03 | 中国科学院广州能源研究所 | System and method for exploiting marine natural gas hydrate resources |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6968893B2 (en) | Method and system for production of gas and water from a gas bearing strata during drilling and after drilling completion | |
| US8313152B2 (en) | Recovery of bitumen by hydraulic excavation | |
| US8287050B2 (en) | Method of increasing reservoir permeability | |
| US4595239A (en) | Oil recovery mining apparatus | |
| US8127865B2 (en) | Method of drilling from a shaft for underground recovery of hydrocarbons | |
| CA2609601C (en) | Method for underground recovery of hydrocarbons | |
| US9574404B2 (en) | High pressure large bore well conduit system | |
| US20130043031A1 (en) | Manifold string for selectivity controlling flowing fluid streams of varying velocities in wells from a single main bore | |
| US4165903A (en) | Mine enhanced hydrocarbon recovery technique | |
| CN1659359A (en) | Method and system for dewatering of coal seams | |
| GB2514075A (en) | High pressure large bore well conduit system | |
| EP2820338B1 (en) | High pressure large bore well conduit system | |
| CN108798608A (en) | A kind of exploitation of gas hydrates system and method | |
| CN107701151A (en) | A kind of method of directional drilling decompression extraction gas hydrates | |
| CN104975868A (en) | Top plate high-position boring large-diameter long-drill-hole gas extraction method based on directional drilling | |
| CN102155187A (en) | Method for treating coal bed bottom plate karst water through hydraulic jetting and radial drilling | |
| CN108412453A (en) | A kind of coal mining water controls system and construction method altogether with gas | |
| LI et al. | Key techniques for directional drilling & construction for control of coal floorOrdovician limestone karst water disaster | |
| WO2024076442A1 (en) | Method and systems for subsurface carbon capture | |
| CN209742871U (en) | Coal-based gas multilayer co-production well type structure | |
| CN114233383B (en) | Construction method of water storage system of open pit coal mine | |
| CN108757009A (en) | A method of eliminating coal and gas prominent using surface drilling | |
| JP2006045839A (en) | Well device having fluid injecting and recovering functions, and method of setting the well device | |
| US11913322B1 (en) | Method and system for maximum oil recovery in a multi-purpose well | |
| CN108397197A (en) | A kind of suppleing level super thick soil property country rock shaft excavation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180216 |