CN108843315B - Sensing type comprehensive automatic metering device and oil quality calculation method - Google Patents
Sensing type comprehensive automatic metering device and oil quality calculation method Download PDFInfo
- Publication number
- CN108843315B CN108843315B CN201810686987.5A CN201810686987A CN108843315B CN 108843315 B CN108843315 B CN 108843315B CN 201810686987 A CN201810686987 A CN 201810686987A CN 108843315 B CN108843315 B CN 108843315B
- Authority
- CN
- China
- Prior art keywords
- liquid
- oil
- tank
- pressure sensor
- control valve
- 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.)
- Expired - Fee Related
Links
- 238000004364 calculation method Methods 0.000 title abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 132
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000005303 weighing Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims description 27
- 238000005192 partition Methods 0.000 claims description 23
- 235000019198 oils Nutrition 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 239000010865 sewage Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 235000019476 oil-water mixture Nutrition 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000010779 crude oil Substances 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007787 solid Substances 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
- 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
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes 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)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The invention discloses a sensing type comprehensive automatic metering device, which is independently matched and is provided with a self-control valve which is switched according to a flow, a specific gas balance pipeline is arranged, the influence of gas in crude oil on a measuring result is avoided, the reading of a pressure sensor is sequentially read, the water content is obtained according to theoretical calculation, and the oil yield and the water yield are calculated under the matching of a weighing sensor; the sensing type comprehensive automatic metering device also has the advantages of simple structure and low manufacturing cost; the method for calculating the water content in the oil-water mixed liquid has the characteristics of convenience in operation and high accuracy.
Description
Technical Field
The invention belongs to the technical field of pressure sensing and weighing equipment, particularly relates to a sensing type comprehensive automatic metering device, and further relates to a calculation method for oil quality in oil-water mixed liquid.
Background
The single well metering is an important work for exploration, development and production management of oil fields, is an important work for mastering the production dynamic of oil wells and making technical support for adjusting measures, is used for reducing the production cost and improving the production efficiency, and is a foundation for the construction of digital oil fields, intelligent oil fields and intelligent oil fields. Because of the crude oil production conditions and the particularity of the produced fluids, the oil well production cannot be accurately measured by traditional measuring instruments, such as flow meters, tipping buckets, electrodes and other instruments or means. The method is particularly characterized in that the oil well is irregular in liquid production, crude oil is solidified by condensation when meeting, wax precipitation and oil-gas-water three media are complex in mixed phase flow state, and solid particles such as oil sludge and gravel are influenced, so that the oil well is difficult to measure, and the produced liquid and the instantaneous water content can not be accurately measured. Due to the reasons, most oil extraction units rely on manual sampling and testing, and drag for the chi measurement at present, so that the measurement error is large, the labor intensity of workers is large, the efficiency is low, and the development cost is high. In view of the above circumstances, a pressure sensing type weight metering device has been developed by a comprehensive method in combination with the actual conditions of the oil field.
Disclosure of Invention
The invention aims to provide a sensing type comprehensive automatic metering device which can provide accurate data for measuring the water content in a crude oil mixed solution.
The invention also aims to provide a method for calculating the oil quality in the oil-water mixed liquid.
The invention has the technical scheme that the sensing type comprehensive automatic metering device comprises a tank body, wherein a first partition plate and a second partition plate are sequentially arranged in the tank body from top to bottom, the tank body is divided into a regulating liquid tank, a metering tank and a liquid storage tank from top to bottom by the first partition plate and the second partition plate, a gas-liquid balance pipe is communicated between the regulating liquid tank and the liquid storage tank, the regulating liquid tank is communicated with an exhaust pipe and a gas-liquid inlet pipe, the first partition plate penetrates through a first connecting pipe for communicating the regulating liquid tank with the metering tank, a first automatic control valve is arranged on the first connecting pipe, the second partition plate penetrates through a second connecting pipe for communicating the metering tank with the liquid storage tank, a second automatic control valve is arranged on the second connecting pipe, a first liquid level sensor, a first pressure sensor and a second pressure sensor are sequentially arranged on the side wall of the metering tank from top to bottom, a weighing sensor is arranged on the second partition plate positioned in the metering tank, and a second liquid level sensor is arranged on the side wall in the liquid storage tank, and the first liquid level sensor, the second liquid level sensor, the first pressure sensor, the second pressure sensor, the first automatic control valve, the second automatic control valve and the weighing sensor are all connected with the same controller.
The invention is also characterized in that:
the bottom end of the liquid storage tank is connected with a blow-off pipe, and a blow-off valve is arranged on the blow-off pipe.
The bottom end of the liquid storage tank is sequentially connected with a motor, a liquid discharge pump and a liquid discharge pipe, a liquid discharge valve is arranged on the liquid discharge pipe, and the liquid discharge pump is connected with a controller.
The outer wall of the tank body is also connected with a display, and the display is connected with a controller.
The invention adopts another technical scheme that a sensing type comprehensive automatic metering device is used for calculating the water content in the oil-water mixed solution, and the method is implemented according to the following steps:
step 1, recording the vertical distance d between a first pressure sensor and a second pressure sensor in advance;
the density of the oil-water mixed liquid is as follows:
in the formula: g is the acceleration of gravity of 9.8g/s2；
Known as ρWater (W)＝1000Kg/m3，ρOil(s)＝815Kg/m3Then, the water content is calculated by the following formula:
volumetric water content P1Comprises the following steps:
mass water content P2Comprises the following steps:
Moil＝MMixing of·P2 (4)；
And 5, closing the first automatic control valve through the controller, opening the second automatic control valve, discharging the oil-water mixed liquid in the metering tank into the liquid storage tank, then opening the liquid discharge pump through the controller to discharge the oil-water mixed liquid, and circularly executing the steps 2-4 to superpose the mass of the oil liquid to obtain the total oil liquid mass.
The beneficial effect of the invention is that,
the sensing type comprehensive automatic metering device is independently matched with an automatic control valve which is switched according to a flow, a specific gas balance pipeline is arranged, the influence of gas in crude oil on a measuring result is avoided, the reading of a pressure sensor is sequentially read, the water content is obtained according to theoretical calculation, and the oil yield and the water yield are calculated under the matching of a weighing sensor; the sensing type comprehensive automatic metering device also has the advantages of simple structure and low manufacturing cost;
the method for calculating the water content in the oil-water mixed liquid has the characteristics of convenience in operation and high accuracy.
Drawings
Fig. 1 is a schematic structural diagram of a sensing type integrated automatic metering device of the present invention.
In the figure, 1, a regulating liquid tank, 2, a metering tank, 3, a liquid storage tank, 4, a first automatic control valve, 5, a second automatic control valve, 6, a blow-down valve, 7, a liquid discharge valve, 8, a first pressure sensor, 9, a second pressure sensor, 10, a weighing sensor, 11, a second liquid level sensor, 12, an exhaust pipe, 13, a gas-liquid balance pipe, 14, a first liquid level sensor, 15, a liquid discharge pipe, 16, a motor, 17, a liquid discharge pump, 18, a first connecting pipe, 19, a second connecting pipe, 20, a controller, 21, a blow-down pipe, 22, a first partition plate, 23, a second partition plate, 24, a gas-liquid inlet pipe and 25 are provided with a display.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a sensing type comprehensive automatic metering device, which comprises a tank body, wherein a first partition plate 22 and a second partition plate 23 are sequentially arranged in the tank body from top to bottom, the tank body is divided into a regulating tank 1, a metering tank 2 and a liquid storage tank 3 from top to bottom by the first partition plate 22 and the second partition plate 23, a gas-liquid balance pipe 13 is communicated between the regulating tank 1 and the liquid storage tank 3, the regulating tank 1 is communicated with an exhaust pipe 12 and a gas-liquid inlet pipe 24, the first partition plate 22 penetrates through a first connecting pipe 18 for communicating the regulating tank 1 and the metering tank 2, a first automatic control valve 4 is arranged on the first connecting pipe 18, the second partition plate 23 penetrates through a second connecting pipe 19 for communicating the metering tank 2 and the liquid storage tank 3, a second automatic control valve 5 is arranged on the second connecting pipe 19, a first liquid level sensor 14, a first pressure sensor 8 and a second pressure sensor 9 are sequentially arranged on the side wall of the metering tank 2 from top to bottom, and a weighing sensor 10 is arranged on a second partition plate 23 positioned in the metering tank 2, a second liquid level sensor 11 is arranged on the side wall in the liquid storage tank 3, and the first liquid level sensor 14, the second liquid level sensor 11, the first pressure sensor 8, the second pressure sensor 9, the first automatic control valve 4, the second automatic control valve 5 and the weighing sensor 10 are all connected with the same controller 20.
The bottom end of the liquid storage tank 3 is connected with a sewage discharge pipe 21, and a sewage discharge valve 6 is arranged on the sewage discharge pipe 21.
The bottom end of the liquid storage tank 3 is sequentially connected with a motor 16, a liquid discharge pump 17 and a liquid discharge pipe 15, a liquid discharge valve 7 is arranged on the liquid discharge pipe 15, and the liquid discharge pump 17 is connected with a controller 20.
The outer wall of the tank body is also connected with a display 25, and the display 25 is connected with the controller 20.
A method for calculating the water content in oil-water mixed liquid uses a sensing type comprehensive automatic metering device and is implemented according to the following steps:
step 1, recording the vertical distance d between a first pressure sensor 8 and a second pressure sensor 9 in advance;
the density of the oil-water mixed liquid is as follows:
in formula 1: g is the acceleration of gravity of 9.8g/s2；
Known as ρWater (W)＝1000Kg/m3，ρOil(s)＝815Kg/m3Then, the water content is calculated by the following formula:
volumetric water content P1Comprises the following steps:
mass water content P2Comprises the following steps:
the sensing type comprehensive automatic metering device has the following functions:
the regulating liquid tank 1, the metering tank 2 and the liquid storage tank 3 are three independent devices and can independently operate; by reasonably switching the automatic control valve, the functions of the user can be fully exerted.
The adjusting liquid tank 1 is used for adjusting the buffer to enter the oil-water mixed liquid, the metering tank 2 is convenient for analyzing and metering the mixed liquid, the liquid storage tank 3 is favorable for storing liquid, the function of the liquid discharge pump 17 is fully exerted, and the liquid discharge efficiency is improved.
The gas-liquid balance pipe 13 can separate oil gas entering the regulating liquid tank 1, the metering tank 2 and the liquid storage tank 3, so that separated gas is discharged through the exhaust port 12, and the influence of pressure generated by the gas on oil-water content measurement is avoided.
The value of the load cell 10 is set to a fixed value in advance, and the controller 20 can receive a command from the load cell 10 to control the opening/closing of the first and second automatic control valves 4 and 5.
The second liquid level sensor 11 can transmit liquid level data in the metering tank 2 and the liquid storage tank 3 to the controller 20, and the controller 20 can send out a liquid level sensor instruction so as to control the starting and stopping of the liquid discharge pump 17 and the opening/closing of the liquid discharge valve 7.
The storage value of the liquid storage tank 3 is set to be a multiple of that of the metering tank 2, a signal is sent to the controller 20, the start and stop of the controllable liquid discharge pump 17 and the liquid discharge valve 7 are controlled, and the efficiency of the liquid discharge pump is improved.
The controller 20 is connected with a display 25, and the display 25 can display the pressure values of the first pressure sensor 8 and the second pressure sensor 9 and the values of the first liquid level sensor 14, the second liquid level sensor 11 and the weighing sensor 10 in real time.
Through the mode, the sensing type comprehensive automatic metering device is independently matched, the automatic control valve is switched according to the flow, the specific gas balance pipeline is arranged, the influence of gas in crude oil on the measurement result is avoided, the reading of the pressure sensor is sequentially read, the water content is obtained through theoretical calculation, and the oil yield and the water yield are calculated through the matching of the weighing sensor; the sensing type comprehensive automatic metering device also has the advantages of simple structure and low manufacturing cost; the method for calculating the water content in the oil-water mixed liquid has the characteristics of convenience in operation and high accuracy.
Claims (1)
1. A method for calculating the oil quality in oil-water mixed liquid is characterized in that a sensing type comprehensive automatic metering device is used, the device comprises a tank body, a first partition plate (22) and a second partition plate (23) are sequentially arranged in the tank body from top to bottom, the tank body is divided into an adjusting liquid tank (1), a metering tank (2) and a liquid storage tank (3) from top to bottom by the first partition plate (22) and the second partition plate (23), a gas-liquid balance pipe (13) is communicated between the adjusting liquid tank (1) and the liquid storage tank (3), the adjusting liquid tank (1) is communicated with an exhaust pipe (12) and a gas-liquid inlet pipe (24), the first partition plate (22) penetrates through a first connecting pipe (18) communicating the adjusting liquid tank (1) and the metering tank (2), a first automatic control valve (4) is arranged on the first connecting pipe (18), the second partition plate (23) penetrates through a second connecting pipe (19) communicating the metering tank (2) and the liquid storage tank (3), a second automatic control valve (5) is arranged on the second connecting pipe (19), a first liquid level sensor (14), a first pressure sensor (8) and a second pressure sensor (9) are sequentially arranged on the side wall of the metering tank (2) from top to bottom, a weighing sensor (10) is arranged on a second partition plate (23) positioned in the metering tank (2), a second liquid level sensor (11) is arranged on the side wall in the liquid storage tank (3), and the first liquid level sensor (14), the second liquid level sensor (11), the first pressure sensor (8), the second pressure sensor (9), the first automatic control valve (4), the second automatic control valve (5) and the weighing sensor (10) are all connected with the same controller (20);
the bottom end of the liquid storage tank (3) is connected with a sewage discharge pipe (21), and a sewage discharge valve (6) is arranged on the sewage discharge pipe (21);
the bottom end of the liquid storage tank (3) is sequentially connected with a motor (16), a liquid discharge pump (17) and a liquid discharge pipe (15), a liquid discharge valve (7) is arranged on the liquid discharge pipe (15), and the liquid discharge pump (17) is connected with a controller (20);
the outer wall of the tank body is also connected with a display (25), and the display (25) is connected with a controller (20);
the method is implemented according to the following steps:
step 1, recording vertical distances d of a first pressure sensor (8) and a second pressure sensor (9) in advance;
step 2, setting a first automatic control valve (4) to be in an open state and a second automatic control valve (5) to be in a closed state through a controller (20), introducing an oil-water mixed liquid into the regulating liquid tank (1) through a gas-liquid inlet pipe (24), enabling the oil-water mixed liquid to enter a metering tank (2) through a first connecting pipe (18), and displaying the reading F of the first pressure sensor (8) by a display (25) when the oil-water mixed liquid reaches the first pressure sensor (8)1The reading F of the second pressure sensor (9)2；
Step 3, recording the reading F of the first pressure sensor (8) according to the step 21The reading F of the second pressure sensor (9)2Calculating the water content:
the density of the oil-water mixed liquid is as follows:
in formula (1): g is the acceleration of gravity of 9.8g/s2；
Known as ρWater (W)＝1000Kg/m3，ρOil＝815Kg/m3Then, the water content is calculated by the following formula:
volumetric water content P1Comprises the following steps:
mass water content P2Comprises the following steps:
step 4, obtaining the total weight M of the oil-water mixture through a weighing sensor (10)Mixing ofAnd then the oil liquid has the following mass:
Moil＝MMixing of·P2 (4)；
The method further comprises the step 5 of closing the first automatic control valve (4) through the controller (20), opening the second automatic control valve (5), discharging the oil-water mixed liquid in the metering tank (2) into the liquid storage tank (3), then opening the liquid discharge pump (17) through the controller (20) to discharge the oil-water mixed liquid, and performing the step 2-4 in a circulating mode, wherein the total oil mass can be obtained by superposing the oil mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810686987.5A CN108843315B (en) | 2018-06-28 | 2018-06-28 | Sensing type comprehensive automatic metering device and oil quality calculation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810686987.5A CN108843315B (en) | 2018-06-28 | 2018-06-28 | Sensing type comprehensive automatic metering device and oil quality calculation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843315A CN108843315A (en) | 2018-11-20 |
| CN108843315B true CN108843315B (en) | 2022-05-10 |
Family
ID=64199995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810686987.5A Expired - Fee Related CN108843315B (en) | 2018-06-28 | 2018-06-28 | Sensing type comprehensive automatic metering device and oil quality calculation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843315B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185430A (en) * | 2019-07-10 | 2019-08-30 | 长江大学 | A kind of cavity-separating oil-water-gas hybrid separation metering device |
| CN112343892B (en) * | 2020-11-04 | 2022-04-22 | 海默新宸水下技术(上海)有限公司 | Hydraulic oil metering device of deepwater blowout preventer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789969A (en) * | 2005-12-02 | 2006-06-21 | 仇小琦 | Apparatus for measuring water content of crude oil and pure crude oil content in oil tank |
| CN202531155U (en) * | 2012-05-14 | 2012-11-14 | 中国石油天然气股份有限公司 | Oil well output metering device |
| CN106988723A (en) * | 2017-04-11 | 2017-07-28 | 中国石油天然气股份有限公司 | Weighing three-phase metering device and measuring method thereof |
| CN107083950A (en) * | 2017-04-24 | 2017-08-22 | 延长油田股份有限公司 | Calibration system and its scaling method based on Weighing type single well metering device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261235B (en) * | 2008-05-06 | 2010-12-08 | 罗平安 | Crude oil gas fraction and moisture percentage dual energy X ray measurement method |
-
2018
- 2018-06-28 CN CN201810686987.5A patent/CN108843315B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789969A (en) * | 2005-12-02 | 2006-06-21 | 仇小琦 | Apparatus for measuring water content of crude oil and pure crude oil content in oil tank |
| CN202531155U (en) * | 2012-05-14 | 2012-11-14 | 中国石油天然气股份有限公司 | Oil well output metering device |
| CN106988723A (en) * | 2017-04-11 | 2017-07-28 | 中国石油天然气股份有限公司 | Weighing three-phase metering device and measuring method thereof |
| CN107083950A (en) * | 2017-04-24 | 2017-08-22 | 延长油田股份有限公司 | Calibration system and its scaling method based on Weighing type single well metering device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843315A (en) | 2018-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106979162B (en) | Pump closed testing bench control system and test method | |
| CN108592978B (en) | Oil gas water multiphase flow on-line metering calibration device | |
| CN105223099B (en) | Shale gas gassiness tester and its test method | |
| CN106988723B (en) | Weighing three-phase metering device and measuring method thereof | |
| CN108843315B (en) | Sensing type comprehensive automatic metering device and oil quality calculation method | |
| CN206801901U (en) | Pump closed testing bench control system | |
| CN112459764A (en) | Multifunctional oil-gas separation metering device | |
| CN101666770A (en) | Device and method for measuring crude oil with low air void | |
| CN207472710U (en) | A kind of device that shale air content is calculated based on continuous collection free of discontinuities | |
| CN201650264U (en) | Oil well liquid-producing measuring device | |
| CN201126379Y (en) | High temperature output liquid automatization metering installation | |
| CN201340279Y (en) | Gas flow testing device for guide vane of turbine | |
| CN201007666Y (en) | Mine slurry continuously autoweighing device | |
| CN208073458U (en) | A kind of real-time separate measurement device of oil gas water three phase | |
| CN207636473U (en) | Natural gas water content rate detection device and natural gas gas recovery facility set group | |
| CN108106698B (en) | On-site calibration device and calibration method for vehicle-mounted single-water-tank type oilfield water meter | |
| CN109030300A (en) | A kind of pit shaft and pipeline small particle sand sedimentation experiment device and method | |
| CN115506775A (en) | Oil-water-gas multi-phase flow array type measuring device and application thereof | |
| CN109752507A (en) | A kind of rock core displacement test oil-gas-water metering device | |
| CN214373303U (en) | Separator separation efficiency's measuring device | |
| CN108254034A (en) | A kind of Novel oil gas moisture phase flow rate on-line metering device and its metering method | |
| CN104847328A (en) | Oil and gas separation device for oil well metering | |
| CN208672484U (en) | A kind of pit shaft and pipeline small particle sand sedimentation experiment device | |
| CN201212393Y (en) | Weighing type oil well metering device | |
| CN204831423U (en) | Double -phase precise measurement device of profit |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220510 |