CN108374652B - Reservoir protection gas lift liquid discharge control device and method - Google Patents
Reservoir protection gas lift liquid discharge control device and method Download PDFInfo
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- CN108374652B CN108374652B CN201810217315.XA CN201810217315A CN108374652B CN 108374652 B CN108374652 B CN 108374652B CN 201810217315 A CN201810217315 A CN 201810217315A CN 108374652 B CN108374652 B CN 108374652B
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- valve core
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- gas
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- 239000007788 liquid Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 97
- 239000010410 layer Substances 0.000 description 12
- 239000002699 waste material Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002356 single layer 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
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- 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)
- Safety Valves (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention provides a reservoir protection gas lift liquid discharge control device, which at least comprises an oil sleeve annulus, an upper joint, a lower joint, an oil pipe, a sleeve and a valve core seat; the upper end and the lower end of the oil pipe are respectively connected with the upper joint and the lower joint, a valve core seat is arranged at one side outside the oil pipe, the valve core seat is positioned between the upper joint and the lower joint, a valve core is arranged on the valve core seat, and a spring is arranged between the valve core and the upper joint; the upper connector corresponding to the upper end of the valve core seat is provided with a vent hole, the upper end of the vent hole is communicated with the annular space of the oil sleeve, and the lower end of the vent hole is communicated with the space where the spring is positioned; a sealing rubber cylinder is arranged between the lower part of the valve core seat and the sleeve; the lower end of the valve core seat is provided with a lower channel. In the gas lift liquid discharge process, sealing can be realized only by the sealing rubber cylinder and the valve core; in the production process, the valve core is opened under the action of pressure difference by depending on the energy of the reservoir, so that the gas channel is opened, the use is convenient, and the energy is not wasted.
Description
Technical Field
The invention relates to the field of gas field development, in particular to a reservoir protection gas lift liquid discharge control device and method, which are suitable for single-layer section and multi-layer section production gas wells with accumulated liquid in all oil pipes and oil sleeve annular spaces.
Background
The existence of the accumulated liquid in the well shaft of the gas well certainly affects the normal production of the gas well, and simultaneously pollutes the gas layer, thereby further reducing the productivity of the gas well. The multistage gas lift valve is arranged in the oil pipe, and the oil pipe accumulated liquid is smoothly discharged by utilizing the gas lift technology in a grading way, so that the multistage gas lift valve is an important measure for realizing the production of the accumulated liquid flooding well. The gas lift drainage technology has good effect in the field application process, but after high-pressure gas is injected into a gas well, a large amount of liquid and gas are reversely injected into a reservoir layer under the action of high pressure while gas lift is realized, so that the gas lift efficiency is poor, the reservoir layer is polluted, and the energy is wasted.
For the problem, as long as the high-pressure gas is ensured to be fully used for lifting liquid in the lifting process, the gas lifting liquid discharging efficiency is improved, and a one-way valve can be arranged at the packer position, so that the high-pressure gas injection into the gas layer is blocked, and the reservoir pollution and the energy waste are avoided. Therefore, the reservoir protection gas lift liquid discharge control device is designed, and the function can be realized.
Disclosure of Invention
In order to solve the problems of poor gas lift efficiency, pollution to a reservoir and energy waste in the prior art, the invention provides a device and a method for controlling gas lift liquid discharge of reservoir protection. The sealing rubber cylinder and the sleeve wall form reliable sealing, the valve core is located on the valve core seat, and the upper and lower gases are tightly sealed. The invention is convenient to use and does not need external force. Sealing can be realized only by a sealing rubber cylinder and a valve core in the gas lift liquid discharge process; in the production process, the valve core is opened under the action of pressure difference by depending on the energy of the reservoir, so that the gas channel is opened, the use is convenient, and the energy is not wasted.
The reservoir protection gas lift liquid discharge control device at least comprises an oil sleeve annulus, an upper joint, a lower joint, an oil pipe, a sleeve and a valve core seat; the upper end and the lower end of the oil pipe are respectively connected with the upper joint and the lower joint, a valve core seat is arranged at one side outside the oil pipe, the valve core seat is positioned between the upper joint and the lower joint, a valve core is arranged on the valve core seat, and a spring is arranged between the valve core and the upper joint; the upper connector corresponding to the upper end of the valve core seat is provided with a vent hole, the upper end of the vent hole is communicated with the annular space of the oil sleeve, and the lower end of the vent hole is communicated with the space where the spring is positioned; a sealing rubber cylinder is arranged between the lower part of the valve core seat and the sleeve; the lower end of the valve core seat is provided with a lower channel.
The valve core is provided with a plurality of valve core air holes.
And two valve core air holes are uniformly formed in the valve core.
The valve core seat is in contact connection with the valve core surface.
The upper end of the lower channel is communicated with the valve core, and the lower end of the lower channel is communicated with the lower part in the sleeve.
A reservoir protection gas lift liquid discharge control method comprises the following specific steps:
The upper joint and the lower joint are connected with an oil pipe at the lowest end in the wellhead up and down, and then are put into a shaft together with the oil pipe; when flooding is seriously caused by accumulated liquid in the late stage of gas well production, the accumulated liquid is tightly stuck to the inner wall of the sleeve under the action of high-pressure gas through the sealing rubber cylinder, the valve core is located on the valve core seat, and a gas channel formed by the vent hole, the valve core air hole and the lower channel is blocked, so that the injected high-pressure gas enters the oil pipe through the gas lift valve of the wellhead oil pipe, and the liquid above the gas lift valve is continuously lifted out; after the liquid is discharged, under the action of the pressure of the air layer, the valve core is compressed by the compression spring, and the air enters the upper part of the sleeve from the air layer through the lower channel, the valve core air hole and the vent hole, so that the communication between the oil sleeve annulus and the oil pipe is realized.
The gas pressure of the high-pressure gas is at least 15MPa.
The gas lift valve is arranged at the position 1-2 km downwards of the wellhead oil pipe.
The beneficial effects of the invention are as follows:
the invention has easy administration and convenient operation. The gas well production line can be connected to the oil pipe at the initial stage of production of the gas well, and can be lowered together with the oil pipe, and the gas well production line does not need to be started.
The invention has the advantages of convenient sealing and reliable sealing. The sealing rubber cylinder and the sleeve wall form reliable sealing, the valve core is located on the valve core seat, and the upper and lower gases are tightly sealed.
The invention is convenient to use and does not need external force. Sealing can be realized only by a sealing rubber cylinder and a valve core in the gas lift liquid discharge process; in the production process, the valve core is opened under the action of pressure difference by depending on the energy of the reservoir, and the gas channel is opened, so that the use is convenient.
The invention has wide application range. The components in the device can bear high pressure and are suitable for working in deep wells or high-pressure gas wells. And can also be used for gas production in inclined wells.
Further description will be made below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
In the drawings, reference numerals are: 1. an oil jacket annulus; 2. an upper joint; 3. a vent hole; 4. a spring; 5. a valve core; 6. a valve core air hole; 7. a lower channel; 8. sealing rubber cylinder; 9. a lower joint; 10. an oil pipe; 11. a sleeve; 12. and a valve core seat.
Detailed Description
Example 1:
In order to solve the problems of poor gas lift efficiency, pollution to a reservoir and energy waste in the prior art, the invention provides a reservoir protection gas lift liquid discharge control device and a reservoir protection gas lift liquid discharge control method as shown in fig. 1. The sealing rubber cylinder and the sleeve wall form reliable sealing, the valve core is located on the valve core seat, and the upper and lower gases are tightly sealed. The invention is convenient to use and does not need external force. Sealing can be realized only by a sealing rubber cylinder and a valve core in the gas lift liquid discharge process; in the production process, the valve core is opened under the action of pressure difference by depending on the energy of the reservoir, so that the gas channel is opened, the use is convenient, and the energy is not wasted. The reservoir protection gas lift liquid discharge control device at least comprises an oil sleeve annulus 1, an upper joint 2, a lower joint 9, an oil pipe 10, a sleeve 11 and a valve core seat 12; the upper end and the lower end of the oil pipe 10 are respectively connected with the upper joint 2 and the lower joint 9, a valve core seat 12 is arranged at one side outside the oil pipe 10, the valve core seat 12 is positioned between the upper joint 2 and the lower joint 9, a valve core 5 is arranged on the valve core seat 12, and a spring 4 is arranged between the valve core 5 and the upper joint 2; the upper joint 2 corresponding to the upper end of the valve core seat 12 is provided with a vent hole 3, the upper end of the vent hole 3 is communicated with the oil sleeve annulus 1, and the lower end of the vent hole 3 is communicated with the space where the spring 4 is positioned; a sealing rubber cylinder 8 is arranged between the lower part of the valve core seat 12 and the sleeve 11; the lower end of the valve core seat 12 is provided with a lower channel 7.
The invention can realize the function of unidirectional control. When the gas lift operation is implemented, high-pressure gas enters the oil pipe from the gas lift valve in a grading manner, accumulated liquid in the oil pipe above the gas lift valve is continuously discharged out of the shaft, the device is used for sealing a reservoir by the packer, the device is in sealing connection with the sleeve 11 through the sealing glue barrel 8, meanwhile, the valve core 5 is located on the valve core seat 12 when the device does not work, the lower channel 7 cannot be communicated with the valve core air hole 6 on the valve core 5, and high-pressure gas and liquid are prevented from being reversely injected into the reservoir. After the accumulated liquid is completely discharged, the gas lift operation is stopped. After the well is opened for production, the accumulated liquid above the device is discharged, the pressure difference between the upper part and the lower part is increased, and the gas well is recovered for normal production. Meanwhile, due to the action of the pressure difference between the upper and lower sides of the reservoir protection gas lift liquid discharge control device, the valve core 5 of the device is provided with the compression spring 4, gas enters the upper part of the sleeve 11 from the gas layer through the lower channel 7, the valve core air hole 6 and the vent hole 3, and the communication between the oil sleeve annulus 1 and the oil pipe 10 is realized in the shaft.
Example 2:
Based on the above embodiment, in this embodiment, the valve core 5 is provided with a plurality of valve core air holes 6.
In this embodiment, two valve core air holes 6 are uniformly formed in the valve core 5. The two valve core air holes 6 can be used for accelerating the speed when the air goes upwards, so that the time can be effectively saved.
The valve core seat 12 is in surface contact connection with the valve core 5.
The upper end of the lower channel 7 is communicated with the valve core 5, and the lower end of the lower channel 7 is communicated with the lower part in the sleeve 11.
A reservoir protection gas lift liquid discharge control method is characterized in that: the method comprises the following specific steps:
The upper joint 2 and the lower joint 9 are connected with an oil pipe 10 at the lowest end in a wellhead up and down, and then are put into a shaft together with the oil pipe 10; when flooding is seriously caused by accumulated liquid in the late stage of gas well production, the accumulated liquid is tightly stuck to the inner wall of a sleeve 11 under the action of high-pressure gas through a sealing rubber cylinder 8, a valve core 5 is located on a valve core seat 12, and a gas channel formed by a vent hole 3, a valve core air hole 6 and a lower channel 7 is blocked, so that the injected high-pressure gas enters an oil pipe 10 through a gas lift valve of a wellhead oil pipe, and the liquid above the gas lift valve is continuously lifted out; after the liquid is discharged, under the action of the pressure of the air layer, the valve core 5 is compressed by the compression spring 4, and the air enters the upper part of the sleeve 11 from the air layer through the lower channel 7, the valve core air hole 6 and the vent hole 3, so that the oil sleeve annulus 1 is communicated with the oil pipe 10.
The gas pressure of the high-pressure gas is at least 15MPa.
The gas lift valve is arranged at the position 1-2 km downwards of the wellhead oil pipe.
The invention is realized in the following way:
The upper joint 2 and the lower joint 9 are connected with the oil pipe 10 up and down, and then are put into a shaft together with the oil pipe 10. When flooding is stopped due to serious effusion in the late stage of gas well production, a gas lift liquid discharge and production recovery technology is needed. At this time, in the process of gas lift, the sealing rubber cylinder 8 is tightly attached to the inner wall of the sleeve 11 under the action of high-pressure gas, the valve core 5 is located on the valve core seat 12, and the gas channel formed by the vent hole 3, the valve core air hole 6 and the lower channel 7 is blocked, so that the injected high-pressure gas enters the oil pipe 10 through the gas lift valve, and the liquid above the gas lift valve is continuously lifted. After the liquid is discharged, under the action of the pressure of the gas layer, the device has a unidirectional control function, the valve core 5 is provided with the compression spring 4 in an upward pressure mode, gas enters the upper portion of the sleeve 11 of the reservoir protection gas lift liquid discharge control device from the gas layer through the lower channel 7, the valve core air hole 6 and the vent hole 3, the communication between the oil sleeve annulus 1 and the oil pipe 10 is achieved, and the normal production of the gas well is achieved.
The method is simple and convenient to operate, saves the production cost, avoids the pollution of liquid in the gas lift process to the reservoir and the energy waste of the high-pressure gas source, and ensures the normal production of the gas well. The invention can be used for various high-pressure and low-pressure gas wells.
The invention has easy administration and convenient operation. The gas well production line can be connected to a wellhead oil pipe at the initial stage of production of the gas well, and can be lowered together with the wellhead oil pipe, and the gas well production line does not need to be started. The invention has the advantages of convenient sealing and reliable sealing. The sealing rubber cylinder 8 forms reliable seal with the wall of the sleeve 11, the valve core 5 is located on the valve core seat 12, and the upper and lower air is tightly sealed. The invention is convenient to use and does not need external force. Sealing can be realized only by the sealing rubber cylinder 8 and the valve core 5 in the gas lift liquid discharge process; in the production process, the valve core 5 is opened under the action of pressure difference by depending on the energy of the reservoir, and a gas channel is opened, so that the use is convenient. The invention has wide application range. The components in the device can bear high pressure and are suitable for working in deep wells or high-pressure gas wells. And can also be used for gas production in inclined wells.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention. Devices and structures not described in detail in the present invention are all prior art, and will not be described in detail.
Claims (7)
1. A reservoir protection gas lift liquid discharge control method is characterized in that: adopting a reservoir protection gas lift liquid discharge control device, wherein the device at least comprises an oil sleeve annulus (1), an upper joint (2), a lower joint (9), an oil pipe (10), a sleeve (11) and a valve core seat (12); the upper end and the lower end of the oil pipe (10) are respectively connected with the upper joint (2) and the lower joint (9), a valve core seat (12) is arranged at one outer side of the oil pipe (10), the valve core seat (12) is positioned between the upper joint (2) and the lower joint (9), a valve core (5) is arranged on the valve core seat (12), and a spring (4) is arranged between the valve core (5) and the upper joint (2); the upper connector (2) corresponding to the upper end of the valve core seat (12) is provided with a vent hole (3), the upper end of the vent hole (3) is communicated with the oil sleeve annulus (1), and the lower end of the vent hole (3) is communicated with the space where the spring (4) is located; a sealing rubber cylinder (8) is arranged between the lower part of the valve core seat (12) and the sleeve (11); the lower end of the valve core seat (12) is provided with a lower channel (7);
The reservoir protection gas lift liquid discharge control method comprises the following specific steps:
The upper joint (2) and the lower joint (9) are connected with an oil pipe (10) at the lowest end in the wellhead up and down, and then are lowered into a shaft together with the oil pipe (10); when flooding is seriously caused by accumulated liquid in the late stage of gas well production, the accumulated liquid is tightly stuck to the inner wall of a sleeve (11) under the action of high-pressure gas through a sealing rubber cylinder (8), a valve core (5) is located on a valve core seat (12), a gas channel formed by a vent hole (3), a valve core gas hole (6) and a lower channel (7) is blocked, so that the injected high-pressure gas enters the oil pipe (10) through a gas lift valve of a wellhead oil pipe, and the liquid above the gas lift valve is continuously lifted out; after the liquid is discharged, under the action of the pressure of the air layer, the valve core (5) is compressed by the compression spring (4), and the air enters the upper part of the sleeve (11) from the air layer through the lower channel (7), the valve core air hole (6) and the vent hole (3), so that the oil sleeve annulus (1) is communicated with the oil pipe (10).
2. The reservoir protection gas lift drainage control method of claim 1, wherein: the valve core (5) is provided with a plurality of valve core air holes (6).
3. The reservoir protection gas lift drainage control method of claim 1, wherein: two valve core air holes (6) are uniformly formed in the valve core (5).
4. The reservoir protection gas lift drainage control method of claim 1, wherein: the valve core seat (12) is in surface contact connection with the valve core (5).
5. The reservoir protection gas lift drainage control method of claim 1, wherein: the upper end of the lower channel (7) is communicated with the valve core (5), and the lower end of the lower channel (7) is communicated with the inner lower part of the sleeve (11).
6. The reservoir protection gas lift drainage control method of claim 1, wherein: the gas pressure of the high-pressure gas is at least 15MPa.
7. The reservoir protection gas lift drainage control method of claim 1, wherein: the gas lift valve is arranged at the position 1-2 km downwards of the wellhead oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810217315.XA CN108374652B (en) | 2018-03-16 | 2018-03-16 | Reservoir protection gas lift liquid discharge control device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810217315.XA CN108374652B (en) | 2018-03-16 | 2018-03-16 | Reservoir protection gas lift liquid discharge control device and method |
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| Publication Number | Publication Date |
|---|---|
| CN108374652A CN108374652A (en) | 2018-08-07 |
| CN108374652B true CN108374652B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810217315.XA Active CN108374652B (en) | 2018-03-16 | 2018-03-16 | Reservoir protection gas lift liquid discharge control device and method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114278250B (en) * | 2021-04-16 | 2023-11-17 | 中国海洋石油集团有限公司 | Marine low-pressure gas well fixed-point dragging continuous liquid drainage pipe column and liquid drainage method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709637A (en) * | 2009-11-17 | 2010-05-19 | 中国海洋石油总公司 | Air lifting device for thermal recovery |
| CN203081417U (en) * | 2012-12-10 | 2013-07-24 | 中国石油天然气股份有限公司 | Multifunctional integrated gas lift technique pipe column |
| CN203559876U (en) * | 2013-10-29 | 2014-04-23 | 中国石油化工股份有限公司 | Closed gas-lift liquid discharge combined tubing string for low-pressure oil and gas well |
| CN106812510A (en) * | 2015-12-01 | 2017-06-09 | 中国石油天然气股份有限公司 | Tubing string and completion method |
| CN208073449U (en) * | 2018-03-16 | 2018-11-09 | 中国石油天然气股份有限公司 | A kind of reservoir protection gas lift liquid drainage control device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2009223251B2 (en) * | 2008-03-13 | 2014-05-22 | Pine Tree Gas, Llc | Improved gas lift system |
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2018
- 2018-03-16 CN CN201810217315.XA patent/CN108374652B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709637A (en) * | 2009-11-17 | 2010-05-19 | 中国海洋石油总公司 | Air lifting device for thermal recovery |
| CN203081417U (en) * | 2012-12-10 | 2013-07-24 | 中国石油天然气股份有限公司 | Multifunctional integrated gas lift technique pipe column |
| CN203559876U (en) * | 2013-10-29 | 2014-04-23 | 中国石油化工股份有限公司 | Closed gas-lift liquid discharge combined tubing string for low-pressure oil and gas well |
| CN106812510A (en) * | 2015-12-01 | 2017-06-09 | 中国石油天然气股份有限公司 | Tubing string and completion method |
| CN208073449U (en) * | 2018-03-16 | 2018-11-09 | 中国石油天然气股份有限公司 | A kind of reservoir protection gas lift liquid drainage control device |
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| CN108374652A (en) | 2018-08-07 |
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