CN204312030U - Associated gas recovery device for cluster well group - Google Patents
Associated gas recovery device for cluster well group Download PDFInfo
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- CN204312030U CN204312030U CN201420686500.0U CN201420686500U CN204312030U CN 204312030 U CN204312030 U CN 204312030U CN 201420686500 U CN201420686500 U CN 201420686500U CN 204312030 U CN204312030 U CN 204312030U
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- associated gas
- ball valve
- valve
- supercharging device
- well group
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- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 230000006835 compression Effects 0.000 abstract description 9
- 238000007906 compression Methods 0.000 abstract description 9
- 238000005086 pumping Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 108
- 239000003921 oil Substances 0.000 description 46
- 239000010779 crude oil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000269793 Cryothenia peninsulae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- -1 due to narrow-minded Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Check Valves (AREA)
Abstract
The utility model relates to a well group associated gas retrieves field, especially a be used for cluster well group associated gas recovery unit. It includes and loops through the first ball valve of tube coupling between associated gas input to the associated gas output, the filter, the turbocharging system, the fifth ball valve, wherein the turbocharging system comprises supercharging device and 4 check valves, the filter links to each other through two air inlets about first check valve and second check valve and supercharging device one side respectively, the last gas outlet of supercharging device opposite side and lower gas outlet are connected to the fifth ball valve through third check valve and fourth check valve respectively, supercharging device's piston rod top is articulated with the walking beam of beam-pumping unit, turbocharging system and fifth ball valve between be provided with the flowmeter, the associated gas oil gas after the compression is thoughtlessly defeated to the supercharging point or connects the transfer station, the associated gas obtains fully recycling.
Description
Technical field
The utility model relates to well group associated gas and reclaims field, particularly a kind of for collecting well group associated gas recovery device.
Background technology
Generally, when bottom pressure is reduced to lower than bubble point pressure, associated gas can be separated from crude oil.An isolated associated gas part accumulates in oil sets annular space, well fluid level is forced to decline, the effective producing pressure differential of oil well is reduced, production capacity declines, a part flows to into oil well pump pump chamber with liquid, occupies certain pump chamber space, affects pump efficiency, can occur " gas lock " time serious, oil well pump cannot be worked.
This part associated gas also can cause in oil and gas multiphase flow process in addition, and occur " slug flow " phenomenon, the collection that greatly have impact on downstream is defeated.The utility model method and device are exactly solve the bottleneck reclaimed at cluster well field oil-containing associated gas.
For being that in main well site, cluster well refers on a well site or platform, gets out some mouths even up to a hundred mouthfuls of wells mainly with cluster well, each well pithead position is at a distance of less than several meters, and different azimuth is then stretched in shaft bottom.Cluster well can reduce gathering and transferring process, saves the investment of human, financial, and material resources.Usually, in oil recovery manufacturing process, individual well well site associated gas, due to narrow-minded, dispersion, can not form economic utilization scale, is mostly directly discharged or burn, both wasting precious resources, and polluted environment again.Collecting well group is in emptying state under normal circumstances, and only when well site running temperature is low in the winter time, heating crude oil in the direct supply station of these associated gases, to reduce outer defeated resistance.
Utility model content
The purpose of this utility model is to provide one for collecting well group associated gas recovery device, collecting well group associated gas can be reclaimed, and torch emptying before reducing, by the past by the comprehensive utilization of resources of burning, served the object of preserving the ecological environment.
A kind of for collecting well group associated gas recovery device, it is characterized in that: it comprise by between associated gas input to associated gas output successively by the first ball valve that pipeline connects, strainer, pressurization system, 5th ball valve, wherein pressurization system is made up of supercharging device and 4 flap valve, strainer is connected with upper and lower two air inlet ports in the second flap valve and supercharging device side respectively by the first flap valve, the upper gas outlet of supercharging device opposite side and lower gas outlet are connected to the 5th ball valve respectively by the 3rd flap valve and the 4th flap valve, the piston rod top of supercharging device and the walking beam of oil pumper hinged, flow meter is provided with between described pressurization system and the 5th ball valve.
Described supercharging device is double-acting cylinder.
Described pressurization system is connected by pipeline with flow meter through the second ball valve, and flow meter is connected by pipeline with the 5th ball valve of associated gas output through the 4th ball valve again, and flow meter is electrically connected with control cabinet.
Described pressurization system is also connected directly to the 5th ball valve by the 3rd ball valve.
Be provided with the first pressure transmitter between the first described ball valve and strainer, be also provided with the second pressure transmitter before the 5th ball valve, the first pressure transmitter and the second pressure transmitter are all electrically connected with control cabinet.
Described associated gas pressurizing device by measuring the upper and lower dead-centre position of oil pumping machine oil beam, by the cylinder part of supercharging device and Framework of Pumping Unit hinged, the piston rod top of supercharging device and the walking beam of oil pumper hinged.
Described pressurization system output is also provided with safety valve.
Also the 6th valve is connected with by pipeline between the associated gas input of the first described ball valve front end and the associated gas output of the 5th ball valve rear end.
A kind of for collecting well group associated gas recovery method, associated gas inputs in supercharging device, the piston rod of supercharging device is driven to act on up and down through walking beam on pumping units when being acted on up and down by oil pumper, supercharging device to be moved in circles operation along with oil pumper, associated gas in the upper and lower cylinder of supercharging device is interlocked after supercharging and exports, it comprises the following steps, open the first ball valve, associated gas is filtered by strainer after the first ball valve, when oil pumper runs from top dead centre toward lower dead center, first flap valve at the enterprising gas port place of supercharging device is opened, second closure of check ring, well head associated gas enters cylinder, meanwhile piston bar is when down running, compress again the associated gas of homonymy cylinder simultaneously, 3rd flap valve at lower gas outlet place is opened, 4th closure of check ring, associated gas in the cylinder body of downside is by exporting after pressurization system supercharging, when oil pumper runs from lower dead center toward top dead centre, on the downside of supercharging device, second flap valve at cylinder air inlet place is opened, first closure of check ring, associated gas enters downside cylinder, and meanwhile, piston rod upwards runs, the associated gas of compression upside cylinder, 4th flap valve at upper gas outlet place is opened, the 3rd closure of check ring, and the associated gas in the cylinder body of upside is by exporting after pressurization system supercharging, second ball valve, the 4th ball valve and the 5th ball valve are all in opening, and the associated gas after supercharging is through the second ball valve, then through flow meter metering, then outer defeated respectively by the 4th ball valve and the 5th ball valve, and last and crude oil mixed-transferring is to downstream.
To be these associated gas recovery devices with oil pumper move up and down the beneficial effects of the utility model drives supercharging device motion, supercharging device to be moved in circles operation along with oil pumper, thus the associated gas in the upper and lower cylinder of supercharging device is interlocked after supercharging export, associated gas oil and gas multiphase flow after compression is to supercharging point or block station, well site associated gas is fully reclaimed, due to the recovery of associated gas in sleeve pipe, casing pressure is reduced, oil reservoir producing fluid level rises, submergence increases, thus effectively reduce the back pressure of associated gas to oil reservoir liquid level, overcome " gas lock ", improve pump efficiency, play the effect that cluster well increases oil volume increase, also due to collecting well group associated gas is reclaimed, torch emptying before reducing, by the past by the comprehensive utilization of resources of burning, serve the object of preserving the ecological environment, Social benefit and economic benefit is remarkable.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the utility model is described in further detail.
Fig. 1 is this retracting device structural representation;
In figure: 1, associated gas input; 2, the first ball valve; 3, the first pressure transmitter; 4, strainer; 5, the first flap valve; 6, the second flap valve; 7, supercharging device; 8, the 3rd flap valve; 9, the 4th flap valve; 10, oil pumper; 11, safety valve; 12, control cabinet; 13, the second ball valve; 14, the 3rd ball valve; 15, flow meter; 16, the 4th ball valve; 17, the second pressure transmitter; 18, the 5th ball valve; 19, the 6th ball valve; 20, associated gas output.
Detailed description of the invention
Embodiment 1
It is this for collecting well group associated gas recovery device that the utility model provides, as shown in Figure 1, it comprise by between associated gas input 1 to associated gas output 20 successively by the first ball valve 2 that pipeline connects, strainer 4, pressurization system, 5th ball valve 18, wherein pressurization system is made up of supercharging device 7 and 4 flap valve, strainer 4 is connected with upper and lower two air inlet ports in supercharging device 7 side with the second flap valve 6 respectively by the first flap valve 5, the upper gas outlet of supercharging device 7 opposite side and lower gas outlet are connected to the 5th ball valve 18 respectively by the 3rd flap valve 8 and the 4th flap valve 9, the piston rod top of supercharging device 7 and the walking beam of oil pumper 10 hinged.
After this associated gas recovery device connects according to above-mentioned annexation, well site is accessed from the associated gas of formula well group by associated gas input 1, open the first ball valve 2, associated gas is filtered by strainer 4 after the first ball valve 2, filter out heavy hydrocarbon, water and other impurity contained in associated gas, then enter pressurization system.
Supercharging device 7 in this pressurization system is double-acting cylinder, due to the piston rod top of supercharging device 7 and the walking beam of oil pumper 10 hinged, when oil pumper 10 runs from top dead centre toward lower dead center, first flap valve 5 at the enterprising gas port place of supercharging device 7 is opened, well head associated gas enters cylinder, meanwhile piston bar is when down running, compress again the associated gas of homonymy cylinder simultaneously, 3rd flap valve 8 at lower gas outlet place is opened, and the associated gas in the cylinder body of downside is by being exported by associated gas output 20 through the 5th ball valve 18 after pressurization system supercharging; When oil pumper 10 runs from lower dead center toward top dead centre, on the downside of supercharging device 7, second flap valve 6 at cylinder air inlet place is opened, associated gas enters downside cylinder, meanwhile, piston rod upwards runs, the associated gas of compression upside cylinder, the 4th flap valve 9 at upper gas outlet place is opened, and the associated gas in the cylinder body of upside is by being exported by associated gas output 20 through the 5th ball valve 18 after pressurization system supercharging.
This associated gas recovery device moves up and down with oil pumper 10 and drives supercharging device 7 to move, supercharging device 7 to be moved in circles operation along with oil pumper 10, thus the associated gas in supercharging device about 7 cylinder is interlocked after supercharging export, associated gas oil and gas multiphase flow after compression is to supercharging point or block station, well site associated gas is fully reclaimed, due to the recovery of associated gas in sleeve pipe, casing pressure is reduced, oil reservoir producing fluid level rises, submergence increases, thus effectively reduce the back pressure of associated gas to oil reservoir liquid level, overcome " gas lock ", improve pump efficiency, play the effect that cluster well increases oil volume increase, also due to collecting well group associated gas is reclaimed, torch emptying before reducing, by the past by the comprehensive utilization of resources of burning, serve the object of preserving the ecological environment, Social benefit and economic benefit is remarkable.
Wherein the specific works principle of supercharging device 7 is: supercharging device 7 adopts double acting supercharging device, when the sucker rod of oil pumper 10 upwards works, the oily sill bolt of oil pumper 10 moves the piston rod upwards action of supercharging device 7, now form negative pressure in the chamber, the end of supercharging device 7, be 0.3MPa from the atmospheric pressure that comes of well head associated gas input 1, be greater than supercharging device 7 end cavity pressure, associated gas is opened the second flap valve 6 and is entered chamber, supercharging device 7 end.Sucker rod upwards runs to top dead centre and is converted to and moves downward, drive the gas in piston rod compression chamber, the end to 0.6MPa, while piston rod acts on downwards, supercharging device 7 pushes up chamber can form negative pressure simultaneously, association air-flow washes the first flap valve 5 under pressure open, enters chamber, top.When oil pumper 10 moves to lower dead center, turning is compressed to 0.6MPa to top chamber gas, and chamber, the end is in suction condition.Namely the sucker rod knee-action of oil pumper 10 once completes a working cycles, completes the function of air-breathing, compression, exhaust.
This supercharging device 7 utilizes sucker rod oil beam when acting on up and down to piston rod effect, then to realize supercharging object by air work.Energy required for it is the electric energy that consumes of oil pumper 10 mainly, and namely motor passes to the moment of torsion on the piston rod of supercharging device 7 by reduction box.
The design formulas calculating the outer moment of couple is:
（N·m）
If power of motor is 11kW, output torque is 26KNm, then calculated the rotating speed of shaft by this formula.In addition, device institute consumed power can use following formula simple computation:
In formula: P
1=300kPa, V
1=20m
3/ h=0.33 m
3/ min, k are that adiabatic coefficent gets 1.2,
for compression ratio 600/300=2.0
N=1.634×3×0.33×6×[2
0.17-1]=1.21kW
After the test of this collecting well group associated gas recovery device, apply this supercharging device recyclable association tolerance 240m every day
3/ d.Collecting well group associated gas inlet pressure is 0.2-0.4MPa, and after supercharging, associated gas pressure is 0.6MPa, again reduces wellhead back pressure while carrying out supercharging, reaches the object of oil and gas multiphase flow.The test of intelligent flow meter instantaneous delivery is about 10m
3/ h, device and oil pumper 10 all safe and reliable.
Embodiment 2
Flow meter 15 is provided with between the pressurization system of the present embodiment and the 5th ball valve 18, pressurization system is connected by pipeline with flow meter 15 through the second ball valve 13, flow meter 15 is connected by pipeline with the 5th ball valve 18 of associated gas output 20 through the 4th ball valve 16 again, and pressurization system is also connected directly to the 5th ball valve 18 by the 3rd ball valve 14.
Open the second ball valve 13 and the 4th ball valve 16, close the 3rd ball valve 14, the associated gas after supercharging through the second ball valve 13, then measures through flow meter 15, then outer defeated respectively by the 4th ball valve 16 and the 5th ball valve 18, and last and crude oil mixed-transferring is to downstream; When not needing metering, close the second ball valve 13 and the 4th ball valve 16, open the 3rd ball valve 14, the associated gas after supercharging is directly by defeated outside the 3rd ball valve 14 and the 5th ball valve 18.
The first pressure transmitter 3 is provided with between first ball valve 2 and strainer 4, the second pressure transmitter 17 is also provided with before 5th ball valve 18, first pressure transmitter 3 and the second pressure transmitter 17 are all electrically connected with control cabinet 12, control cabinet 12 is also electrically connected with flow meter 15, well site collecting well group associated gas is carried out atmospheric pressure and is measured by the first pressure transmitter 3, and the outer defeated pressure of associated gas is measured by the second pressure transmitter 17.
The electrical power distribution of two pressure transmitters and flow meter 15 draws 380V power supply from the power distribution cabinet of oil pumper 10 to be connected to control cabinet 12, exports 24V voltage and normally work for flow meter 15 and two pressure transmitters after control cabinet 12 2 transformations.
Embodiment 3
Associated gas pressurizing device 7 by measuring the upper and lower dead-centre position of the oily beam of oil pumper 10, by the cylinder part of supercharging device 7 and oil pumper 10 support hinged, the piston rod top of supercharging device 7 and the walking beam of oil pumper 10 hinged; Oil pumper 10 drives this device piston rod upstream or downstream by up-down stroke, aspirates and compress gas.
Embodiment 4
Pressurization system output is also provided with safety valve 11, and when whole system superpressure, safety valve 11 will be opened automatically; Also the 6th valve 19 is connected with by pipeline between the associated gas input 1 of the first ball valve 2 front end and the associated gas output 20 of the 5th ball valve 18 rear end, close the first ball valve 2 and the 5th ball valve 18 when whole device is in inspecting state, open the 6th valve 19 and overhaul.
Embodiment 5
For collecting well group associated gas recovery method, associated gas inputs in supercharging device 7, the piston rod of supercharging device 7 is driven to act on up and down through oil pumper 10 walking beam when being acted on by oil pumper about 10, supercharging device 7 to be moved in circles operation along with oil pumper 10, and interlocking after supercharging to the associated gas in supercharging device about 7 cylinder exports.
Specifically comprise the following steps: open the first ball valve 2, associated gas is filtered by strainer 4 after the first ball valve 2, when oil pumper 10 runs from top dead centre toward lower dead center, first flap valve 5 at the enterprising gas port place of supercharging device 7 is opened, second flap valve 6 cuts out, well head associated gas enters cylinder, meanwhile piston bar is when down running, compress again the associated gas of homonymy cylinder simultaneously, 3rd flap valve 8 at lower gas outlet place is opened, 4th flap valve 9 cuts out, and the associated gas in the cylinder body of downside is by exporting after pressurization system supercharging; When oil pumper 10 runs from lower dead center toward top dead centre, on the downside of supercharging device 7, second flap valve 6 at cylinder air inlet place is opened, first flap valve 5 cuts out, associated gas enters downside cylinder, and meanwhile, piston rod upwards runs, the associated gas of compression upside cylinder, 4th flap valve 9 at upper gas outlet place is opened, and the 3rd flap valve 8 cuts out, and the associated gas in the cylinder body of upside is by exporting after pressurization system supercharging; Second ball valve 13, the 4th ball valve 16 and the 5th ball valve 18 are all in opening, and the associated gas after supercharging through the second ball valve 13, then measures through flow meter 15, then outer defeated respectively by the 4th ball valve 16 and the 5th ball valve 18, and last and crude oil mixed-transferring is to downstream.
Claims (8)
1. one kind for collecting well group associated gas recovery device, it is characterized in that: it comprise by between associated gas input (1) to associated gas output (20) successively by the first ball valve (2) that pipeline connects, strainer (4), pressurization system, 5th ball valve (18), wherein pressurization system is made up of supercharging device (7) and 4 flap valve, strainer (4) is connected with upper and lower two air inlet ports in supercharging device (7) side with the second flap valve (6) respectively by the first flap valve (5), the upper gas outlet of supercharging device (7) opposite side and lower gas outlet are connected to the 5th ball valve (18) respectively by the 3rd flap valve (8) and the 4th flap valve (9), the piston rod top of supercharging device (7) and the walking beam of oil pumper (10) hinged, flow meter (15) is provided with between described pressurization system and the 5th ball valve (18).
2. one according to claim 1 is used for collecting well group associated gas recovery device, it is characterized in that: described supercharging device (7) is double-acting cylinder.
3. one according to claim 1 is used for collecting well group associated gas recovery device, it is characterized in that: described pressurization system is connected by pipeline with flow meter (15) through the second ball valve (13), flow meter (15) is connected by pipeline with the 5th ball valve (18) of associated gas output (20) through the 4th ball valve (16) again, and flow meter (15) is electrically connected with control cabinet (12).
4. one according to claim 3 is used for collecting well group associated gas recovery device, it is characterized in that: described pressurization system is also connected directly to the 5th ball valve (18) by the 3rd ball valve (14).
5. the one according to claim 1 or 3 is used for collecting well group associated gas recovery device, it is characterized in that: between described the first ball valve (2) and strainer (4), be provided with the first pressure transmitter (3), 5th ball valve (18) is front is also provided with the second pressure transmitter (17), and the first pressure transmitter (3) and the second pressure transmitter (17) are all electrically connected with control cabinet (12).
6. one according to claim 1 is used for collecting well group associated gas recovery device, it is characterized in that: described associated gas pressurizing device (7) is by measuring the upper and lower dead-centre position of oil pumper (10) oily beam, by the cylinder part of supercharging device (7) and oil pumper (10) support hinged, the piston rod top of supercharging device (7) and the walking beam of oil pumper (10) hinged.
7. one according to claim 1 is used for collecting well group associated gas recovery device, it is characterized in that: described pressurization system output is also provided with safety valve (11).
8. one according to claim 1 is used for collecting well group associated gas recovery device, it is characterized in that: be also connected with the 6th valve (19) by pipeline between the associated gas input (1) of described the first ball valve (2) front end and the associated gas output (20) of the 5th ball valve (18) rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686500.0U CN204312030U (en) | 2014-11-17 | 2014-11-17 | Associated gas recovery device for cluster well group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686500.0U CN204312030U (en) | 2014-11-17 | 2014-11-17 | Associated gas recovery device for cluster well group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204312030U true CN204312030U (en) | 2015-05-06 |
Family
ID=53134352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420686500.0U Expired - Fee Related CN204312030U (en) | 2014-11-17 | 2014-11-17 | Associated gas recovery device for cluster well group |
Country Status (1)
| Country | Link |
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| CN (1) | CN204312030U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405343A (en) * | 2014-11-17 | 2015-03-11 | 中国石油天然气股份有限公司 | Associated gas recovery device for cluster well group and recovery method thereof |
| CN106988710A (en) * | 2016-01-20 | 2017-07-28 | 东营玺诺石油科技有限公司 | A kind of oil well casing gas is pressurized collecting device |
| CN108825172A (en) * | 2018-08-29 | 2018-11-16 | 蚌埠市新达压缩机制造有限公司 | Unpowered casing gas recovering device |
| CN109538169A (en) * | 2018-12-10 | 2019-03-29 | 胜利油田森诺胜利工程有限公司 | A kind of simple oil field shaft mouth associated gas collection device and method |
| CN110273665A (en) * | 2019-08-06 | 2019-09-24 | 李牧衡 | A kind of oil well associated gas recycles metering device automatically |
-
2014
- 2014-11-17 CN CN201420686500.0U patent/CN204312030U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405343A (en) * | 2014-11-17 | 2015-03-11 | 中国石油天然气股份有限公司 | Associated gas recovery device for cluster well group and recovery method thereof |
| CN106988710A (en) * | 2016-01-20 | 2017-07-28 | 东营玺诺石油科技有限公司 | A kind of oil well casing gas is pressurized collecting device |
| CN106988710B (en) * | 2016-01-20 | 2019-03-15 | 东营玺诺石油科技有限公司 | A kind of oil well casing gas pressurization collecting device |
| CN108825172A (en) * | 2018-08-29 | 2018-11-16 | 蚌埠市新达压缩机制造有限公司 | Unpowered casing gas recovering device |
| CN109538169A (en) * | 2018-12-10 | 2019-03-29 | 胜利油田森诺胜利工程有限公司 | A kind of simple oil field shaft mouth associated gas collection device and method |
| CN110273665A (en) * | 2019-08-06 | 2019-09-24 | 李牧衡 | A kind of oil well associated gas recycles metering device automatically |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150506 |