CN107165609B - Visual coalbed methane dissipation simulation device and application method thereof - Google Patents
Visual coalbed methane dissipation simulation device and application method thereof Download PDFInfo
- Publication number
- CN107165609B CN107165609B CN201710560097.5A CN201710560097A CN107165609B CN 107165609 B CN107165609 B CN 107165609B CN 201710560097 A CN201710560097 A CN 201710560097A CN 107165609 B CN107165609 B CN 107165609B
- Authority
- CN
- China
- Prior art keywords
- simulation device
- water layer
- gas
- fine sand
- coalbed methane
- 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.)
- Active
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000004088 simulation Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000000007 visual effect Effects 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000004576 sand Substances 0.000 claims abstract description 66
- 239000003245 coal Substances 0.000 claims abstract description 41
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 39
- 239000011521 glass Substances 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 10
- 238000010253 intravenous injection Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 238000003795 desorption Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 235000019580 granularity Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003809 water extraction 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a visual coalbed methane dissipation simulation device and a use method thereof, wherein the visual coalbed methane dissipation simulation device comprises a coalbed methane reservoir simulation device, a coalbed methane source simulation device and a shaft simulation device; the coalbed methane reservoir simulation device comprises a transparent cuboid glass box, wherein a fine sand saturated water layer, a medium sand saturated water layer, a fine sand unsaturated water layer and a rubber baffle layer are sequentially arranged in the glass box from bottom to top; the coal seam gas source simulation device comprises two gas cylinders; the well bore simulation device comprises a water suction pump, a water meter and a gas meter. The invention can simulate the conditions of different types of reservoirs and fluid contained in the reservoirs in the underground of a coalbed methane exploitation site, can control the pressure of the reservoirs, form pressure difference, release gas, simulate the desorption process of the coalbed methane, observe the dissipation process of the coalbed methane, and automatically measure and consider the coalbed methane recovery ratio of the dissipation process in real time.
Description
Technical Field
The invention belongs to the technical field of coal bed gas exploration and development, and particularly relates to a visual coal bed gas escape simulation device and a use method thereof, which can simulate different types of reservoirs under experimental conditions, and the characteristics of gas escape caused by pressure difference are utilized, so that the coal bed gas reservoir recovery ratio considering the escape process is obtained through measurement of a gas meter, and technical support is provided for a coal bed gas production site.
Background
The escape of coal bed gas refers to the phenomenon that coal bed gas escapes from the coal bed to surrounding rock in a free or dissolved state. Although most coalbed methane reservoirs are in an undersaturated adsorption state, free gas does not exist in the coalbed, the hydrocarbon production amount of coal and rock is far greater than the storage amount of the coalbed methane reservoirs, and most coalbed methane is dissipated. In the coal mining process, the surrounding rock which does not contain gas originally is found to have a certain gas-containing phenomenon in the coal mining process. Because the coal bed does not have free gas trapping conditions, the coal bed gas can also escape in the mining process.
The isothermal adsorption curve method in the existing coalbed methane recovery ratio calculation method is prone to researching the desorption characteristics of gas, the recovery ratio can be better calculated by methods such as geology and engineering factors of the coalbed, material balance and numerical simulation, but the required data amount is large and the influence factors of the recovery ratio are difficult to systematically analyze. Therefore, there is a need to propose new and relatively sophisticated methods for calculating coalbed methane recovery, which are used to analyze the main influencing factors of coalbed methane recovery in different stages.
In the process of forming the reservoir, free gas cannot be stored in a crack system of the coal bed, and in the coal bed with low free gas proportion in the initial state, the escape of the coal bed gas is likely to occur in the exploitation process of depressurization and desorption. The loss of the coal bed gas in the mining process can influence the recovery ratio of the coal bed gas, and the research on the loss of the coal bed gas is very little at present.
Disclosure of Invention
In order to study the influence of the dissipation of the coal bed gas on the recovery ratio and analyze the influence factors of the dissipation of the coal bed gas, the invention provides a visual simulation device for the dissipation of the coal bed gas and a use method thereof.
The technical scheme adopted for solving the technical problems is as follows:
a visual coalbed methane reservoir simulation device comprises a coalbed methane reservoir simulation device, a coalbed methane source simulation device and a shaft simulation device; the coalbed methane reservoir simulation device comprises a transparent cuboid glass box, wherein a fine sand saturated water layer, a middle sand saturated water layer, a fine sand unsaturated water layer and a rubber baffle layer are sequentially arranged in the glass box from bottom to top; the fine sand saturated water layer simulates a coal bed, the middle sand saturated water layer simulates a coal bed roof, and the rubber baffle layer simulates a dense gas cover layer, so that a good sealing effect can be achieved.
The coal seam gas source simulation device comprises two gas cylinders which are respectively connected to a fine sand saturated water layer and a fine sand unsaturated water layer through pipelines; the gas entering the fine sand saturated water layer simulates coal bed gas, and the gas entering the fine sand unsaturated water layer simulates dense gas.
The well bore simulation device is arranged at one side of the interior of the glass box, the coalbed methane reservoir simulation device is closely connected with the well bore simulation device, and the well bore simulation device is communicated with the fine sand saturated water layer, the medium sand saturated water layer and the fine sand unsaturated water layer; a water suction pump is arranged in the shaft simulation device, and a water outlet of the water suction pump is connected with a water meter through a pipeline; the top end of the well bore simulation device is connected with the gas meter through a pipeline. The water pump is used for draining water, the water meter is used for measuring the water quantity, and the gas meter is used for measuring the volume of gas.
Preferably, the pipelines in the fine sand saturated water layer and the fine sand unsaturated water layer are respectively intravenous injection pipes, and air outlets on the intravenous injection pipes are respectively provided with one-way valves; when the external pressure is reduced, the gas can flow out from the tube by adopting an intravenous injection tube, and the desorption process is simulated; the gas cylinder is connected with a pipeline provided with a one-way valve, so that the flow direction of gas can be controlled.
The application method of the visual coalbed methane reservoir simulation device comprises the following steps: adding water into the wellbore simulation device until the water reaches a separation line of the rubber baffle layer and the fine sand unsaturated water layer; opening two gas cylinders, and enabling gas to enter a fine sand saturated water layer and a fine sand unsaturated water layer respectively; starting a water suction pump to pump water outwards while opening the gas bottle, observing the flowing condition of gas in the glass box, and recording the pumped water quantity through the water meter; the water level is reduced, the pressure of the fine sand saturated water layer, the medium sand saturated water layer and the fine sand unsaturated water layer is reduced, gas is diffused in different paths, and finally the gas enters a shaft simulation device, and the recovery ratio of the coal bed gas reservoir considering the dissipation process is obtained through measurement of a gas meter.
The visual coalbed methane dissipation simulation device provided by the invention simulates different types of reservoirs by using sand with different granularities, and can play a good role in sealing by using the rubber baffle to simulate the cover layer. The design in the coalbed methane reservoir simulation device can ensure that test gas flows into the shaft during experiments. The gas entering the fine sand saturated water layer and the fine sand unsaturated water layer in the gas source simulation device is outwards diffused in different paths under the action of pressure difference formed during pumping, and the desorption and dissipation processes of the coal bed gas are simulated. The coal bed gas and the dense gas enter the shaft simulation device, the yield of the test gas is measured through the gas meter, the influence of the dissipation of the coal bed gas on the recovery ratio can be analyzed according to the yield data of the gas, and the influence factors of the dissipation of the coal bed gas can be analyzed according to the size of the water extraction amount obtained by the water meter. The whole device adopts a glass box as a limiting condition, and can observe the escape process of the coalbed methane during experiments.
The visual coalbed methane escape simulation device disclosed by the invention needs to meet the following conditions:
(1) The method can simulate the conditions of different types of reservoirs and reservoir fluid in the underground of a coalbed methane exploitation site;
(2) The reservoir pressure can be controlled to form pressure difference, gas is released, and the desorption process of the coalbed methane is simulated;
(3) The escape process of the coalbed methane can be observed;
(4) The degree of pressure drop, namely the amount of water extracted, can be recorded in real time;
(5) The coalbed methane recovery ratio considering the escaping process can be automatically measured in real time.
Compared with the prior art, the invention has the following advantages:
1. the visual coal bed gas escape simulation device is provided for experimental tests of coal bed gas escape for the first time, and the escape process of the coal bed gas can be observed and analyzed;
2. by adopting sand layers with different granularities, different types of underground reservoirs can be fully simulated; the gas cylinders are arranged at two positions, so that the condition of fluid in the reservoir can be fully simulated;
3. the glass box is adopted as a limiting condition, so that the whole process of the experiment can be observed in real time;
4. the whole device has simple structure and convenient operation, and can accurately analyze the influence of the dissipation of the coal bed gas on the recovery ratio.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
a visual coalbed methane reservoir simulation device comprises a coalbed methane reservoir simulation device, a coalbed methane source simulation device and a shaft simulation device; the coalbed methane reservoir simulation device comprises a transparent cuboid glass box, wherein a fine sand saturated water layer 10, a middle sand saturated water layer 11, a fine sand unsaturated water layer 12 and a rubber baffle layer 13 are sequentially arranged in the glass box from bottom to top; the fine sand saturated water layer 10 simulates a coal bed, the middle sand saturated water layer 11 simulates a coal bed roof, and the rubber baffle layer 13 simulates a dense gas cover layer, so that a good sealing effect can be achieved.
In order to simulate the coalbed methane and dense gas, the coalbed methane source simulation device comprises two gas cylinders 14, wherein the two gas cylinders 14 are respectively connected to a fine sand saturated water layer 10 and a fine sand unsaturated water layer 12 through pipelines; the gas entering the fine sand saturated water layer 10 simulates coal bed gas and the gas entering the fine sand unsaturated water layer 12 simulates dense gas.
In order to ensure that the tested gas flows into the shaft simulation device 19, the shaft simulation device 19 is arranged on one side of the inside of the glass box, and the shaft simulation device 19 is communicated with the fine sand saturated water layer 10, the medium sand saturated water layer 11 and the fine sand unsaturated water layer 12; a water pump 15 is arranged in the shaft simulation device 19, a water outlet of the water pump 15 is connected with a water meter 16 through a pipeline, and the water meter 16 is used for measuring the water quantity; the top end of the well bore simulation device 19 is connected with a gas meter 17 through a pipeline, the gas meter 17 is used for measuring the volume of gas, and the measurement of the coalbed methane recovery rate taking the escaping process into consideration after the experiment is finished is realized through the gas meter 17.
In order to simulate desorption, when the external pressure is reduced, gas can flow out from the pipe, the pipelines inside the fine sand saturated water layer 10 and the fine sand unsaturated water layer 12 are respectively intravenous injection pipes, and the air outlets on the intravenous injection pipes are respectively provided with one-way valves 18.
The specific using process comprises the following steps:
during the simulation, water is added into the well bore simulation device 19 until the water reaches the separation line of the rubber baffle layer 13 and the fine sand unsaturated water layer 12; opening two gas cylinders 14, and allowing gas to enter the fine sand saturated water layer 10 and the fine sand unsaturated water layer 12 respectively; starting a water suction pump 15 to start pumping water outwards while opening the gas bottle 14, observing the flowing condition of gas in the glass box, and recording the pumped water quantity through a water meter 16; the water level is reduced, the pressure of the fine sand saturated water layer 10, the medium sand saturated water layer 11 and the fine sand unsaturated water layer 12 is reduced, gas is diffused in different paths, and finally the gas enters the shaft simulation device 19, and the recovery ratio of the coal bed gas reservoir considering the dissipation process is obtained through measurement of the gas meter 17.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present invention and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (3)
1. The visual coalbed methane reservoir simulation device is characterized by comprising a coalbed methane reservoir simulation device, a coalbed methane source simulation device and a shaft simulation device;
the coalbed methane reservoir simulation device comprises a transparent cuboid glass box, wherein a fine sand saturated water layer, a middle sand saturated water layer, a fine sand unsaturated water layer and a rubber baffle layer are sequentially arranged in the glass box from bottom to top;
the coal seam gas source simulation device comprises two gas cylinders which are respectively connected to a fine sand saturated water layer and a fine sand unsaturated water layer through pipelines;
the shaft simulation device is arranged at one side of the interior of the glass box and is communicated with the fine sand saturated water layer, the medium sand saturated water layer and the fine sand unsaturated water layer; a water suction pump is arranged in the shaft simulation device, and a water outlet of the water suction pump is connected with a water meter through a pipeline; the top end of the shaft simulation device is connected with the gas meter through a pipeline;
wherein the pipeline connected to the fine sand saturated water layer extends from a side far from the wellbore simulation device to a bottom of the fine sand saturated water layer and extends along the bottom of the fine sand saturated water layer until a side close to the wellbore simulation device after being bent by 90 degrees.
2. A visual coalbed methane reservoir simulation device as claimed in claim 1, wherein the pipelines in the fine sand saturated water layer and the fine sand unsaturated water layer are respectively intravenous injection pipes, and air outlets on the intravenous injection pipes are respectively provided with one-way valves.
3. A method of using a visual coalbed methane reservoir simulation device as defined in any one of claims 1 to 2, wherein the method of using is: adding water into the wellbore simulation device until the water reaches a separation line of the rubber baffle layer and the fine sand unsaturated water layer; opening two gas cylinders, and enabling gas to enter a fine sand saturated water layer and a fine sand unsaturated water layer respectively; starting a water suction pump to pump water outwards while opening the gas bottle, observing the flowing condition of gas in the glass box, and recording the pumped water quantity through the water meter; the water level is reduced, the pressure of the fine sand saturated water layer, the medium sand saturated water layer and the fine sand unsaturated water layer is reduced, gas is diffused in different paths, and finally the gas enters a shaft simulation device, and the recovery ratio of the coal bed gas reservoir considering the dissipation process is obtained through measurement of a gas meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710560097.5A CN107165609B (en) | 2017-07-11 | 2017-07-11 | Visual coalbed methane dissipation simulation device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710560097.5A CN107165609B (en) | 2017-07-11 | 2017-07-11 | Visual coalbed methane dissipation simulation device and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165609A CN107165609A (en) | 2017-09-15 |
| CN107165609B true CN107165609B (en) | 2023-06-09 |
Family
ID=59823636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710560097.5A Active CN107165609B (en) | 2017-07-11 | 2017-07-11 | Visual coalbed methane dissipation simulation device and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107165609B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896509A (en) * | 2018-07-30 | 2018-11-27 | 中国华能集团有限公司 | In-site measurement collects shale gas desorption quantity and the integrated experimental system of component analysis |
| CN110618080B (en) * | 2019-09-24 | 2022-07-05 | 中联煤层气有限责任公司 | Physical simulation system and test method for forming and removing water lock of different layers of tight sandstone |
| CN110596340B (en) * | 2019-09-24 | 2022-03-11 | 中联煤层气有限责任公司 | Simulation system and method for interference mechanism of coal bed gas-dense gas combined production reservoir |
| CN110595940A (en) * | 2019-09-24 | 2019-12-20 | 中联煤层气有限责任公司 | A physical simulation system and method for critical desorption of coalbed methane |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2436576B (en) * | 2006-03-28 | 2008-06-18 | Schlumberger Holdings | Method of facturing a coalbed gas reservoir |
| CN101387594B (en) * | 2008-09-12 | 2011-06-01 | 煤炭科学研究总院西安研究院 | Coalbed gas high pressure desorption instrument |
| CN102022112B (en) * | 2010-11-04 | 2013-05-08 | 中国石油大学(华东) | Intelligent oil well simulation experiment system and working method |
| CN104453802B (en) * | 2014-05-27 | 2017-10-17 | 贵州省煤层气页岩气工程技术研究中心 | Coal bed gas pit shaft gas-liquid two-phase flow analogue means that many coal seams were adopted jointly |
| CN104564125B (en) * | 2014-12-02 | 2016-06-22 | 河南理工大学 | Cherry coal reservoir gas enhanced gas extraction contrast experiment's device and experimental technique |
| CN204666464U (en) * | 2015-05-26 | 2015-09-23 | 河南理工大学 | The experimental provision of coal-seam gas level pressure desorb |
| CN105089657B (en) * | 2015-06-15 | 2018-05-04 | 中国石油天然气股份有限公司 | Physical simulation method and experimental device for oil-gas filling of fracture-cavity carbonate reservoir |
| CN105735965B (en) * | 2016-04-07 | 2018-09-14 | 中国地质大学（武汉） | Coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision and analogy method |
| CN207048751U (en) * | 2017-07-11 | 2018-02-27 | 国家安全生产监督管理总局信息研究院 | One kind visualization coal bed gas loss analogue means |
| CN212716571U (en) * | 2020-05-28 | 2021-03-16 | 陕西延长石油（集团）有限责任公司 | Fracturing horizontal seam-extra-low permeability reservoir bottom water injection simulation device |
-
2017
- 2017-07-11 CN CN201710560097.5A patent/CN107165609B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107165609A (en) | 2017-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107165609B (en) | Visual coalbed methane dissipation simulation device and application method thereof | |
| CN105974082B (en) | A constant-pressure desorption simulation test method and device for gas-containing coal gas in an overpressure environment | |
| CN106596380B (en) | Shale staged fracturing horizontal well fracturing fluid flowback capability evaluation method and device | |
| CN108169062B (en) | Visual test device and method for simulating the occurrence and desorption process of underground coalbed methane | |
| CN104406980B (en) | Carbon dioxide water phase visual testing device and method in porous media | |
| CN103822856B (en) | Coal body gas adsorption desorbing diffusion modeling experiments device under the conditions of different stress constraints | |
| CN107288632B (en) | Coal-rock reservoir drainage and production water source and pressure drop path simulation device and method | |
| CN106053764B (en) | Experimental method for simulating water-dissolved gas migration in self-generating and self-storage syncline structural basins | |
| CN105134149B (en) | A kind of change carbon dioxide between injection-production well and drive the apparatus and method of situation | |
| CN105637340A (en) | Gas analysis rate testing device for dense rock | |
| CN109882149B (en) | Experimental device and method for simulating production dynamics of fracture-cavity carbonate condensate gas reservoir | |
| CN102720479B (en) | Physical simulation device for gas-cap oil reservoir | |
| CN106401577A (en) | Visual testing device and method for simulating bottom water coning of bottom water gas reservoir gas well | |
| CN108119132A (en) | Tight sandstone gas reservoir near-wellbore-zone radial seepage water saturation simulation device and method | |
| CN109870397A (en) | A kind of isothermal adsorption deformation test device and test method under mixed gas condition | |
| CN207080222U (en) | Coal-rock reservoir water production source and pressure drop path simulation device | |
| CN104697887A (en) | Dynamic desorption-flowing isothermal and constant-pressure experimental facility for gas in coal shale | |
| CN104502546A (en) | Experimental device and method for detecting sealing performance of sealing material of gas drainage drilling hole | |
| CN108798655B (en) | A three-gas combined production experimental device for coalbed methane escape | |
| CN205670151U (en) | A constant pressure desorption simulation test device for gas-containing coal gas in an overpressure environment | |
| CN111323359A (en) | Device and method for measuring spontaneous imbibition of rock core of high-pressure natural gas-water system | |
| CN117706067B (en) | Nuclear magnetic resonance-based measurement device and method for residual oil in rock core pressure lifting exploitation | |
| CN207048751U (en) | One kind visualization coal bed gas loss analogue means | |
| CN110927359B (en) | Experimental test device and method for gas loss content in low-permeability porous medium coring process | |
| CN105569623B (en) | Well head combined measuring device and its method for water injection well |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |