CN111720093A - Intelligent wellhead safety control system with flow monitoring function - Google Patents
Intelligent wellhead safety control system with flow monitoring function Download PDFInfo
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- CN111720093A CN111720093A CN202010563969.5A CN202010563969A CN111720093A CN 111720093 A CN111720093 A CN 111720093A CN 202010563969 A CN202010563969 A CN 202010563969A CN 111720093 A CN111720093 A CN 111720093A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000013016 damping Methods 0.000 claims description 7
- 239000013589 supplement Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 7
- 241000191291 Abies alba Species 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
- E21B34/108—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with time delay systems, e.g. hydraulic impedance mechanisms
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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)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an intelligent wellhead safety control system with flow monitoring, which comprises a high-pressure hydraulic system, a safety valve hydraulic control main circuit, a low-pressure control system and an upper computer control system, wherein the safety valve hydraulic control main circuit comprises an aboveground safety valve hydraulic control branch and an underground safety valve hydraulic control branch, the input ends of the aboveground safety valve hydraulic control main circuit and the underground safety valve hydraulic control main circuit are connected with the output end of the high-pressure hydraulic system, the output end of the aboveground safety valve hydraulic control branch is connected to the aboveground safety valve, and the output end of the underground safety valve hydraulic control; the low pressure control system comprises an fusible plug control branch and a safety valve pilot control branch, the input end of the fusible plug control branch is connected with the output end of the high pressure hydraulic system, and the fusible plug control branch is connected with an aboveground safety valve pilot control branch and an underground safety valve pilot control branch through the safety valve pilot control branch. The invention solves the technical problems of safety valve leakage and valve opening degree judgment, and realizes intelligent control of a wellhead control disc.
Description
Technical Field
The invention relates to a wellhead safety control system, in particular to an intelligent wellhead safety control system with flow monitoring.
Background
The well head control panel is the important equipment of oil field safety production, and when well site conflagration or production pipeline pressure were unusual, control system can realize automatically that logic program promptly shuts off and long-range urgent shutoff, realized shutting off to the safety valve in the pit of production tree and on the well through the pressure release of well head control panel.
At present, a conventional wellhead control panel directly outputs hydraulic pressure to safety valves under a Christmas tree well and on the well, no leakage and flow detection of hydraulic oil exist between the wellhead control panel and the safety valves under the Christmas tree well and on the well, the opening or closing of the safety valves under the Christmas tree well and on the well is judged mainly by a pressure gauge of the wellhead control panel, but in the actual use process of the valves, the underground working condition is severe, and the accidents of valve leakage are easily caused, at the moment, hydraulic oil leakage and metering monitoring cannot be realized only by the pressure gauge, secondly, in the production operation, the opening and closing of the valves are not accurately judged only by pressure, and safety accidents are easily caused, so that data such as flow metering and the like need to be added, and the technical problems of system leakage and valve opening degree are comprehensively judged by combining the opening curve of the safety valves under the well and an upper computer, so that the safety valve, and realize well head control panel intelligent control.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an intelligent wellhead safety control system with flow monitoring.
The technical scheme adopted by the invention is as follows: an intelligent wellhead safety control system with flow monitoring, comprising:
a high pressure hydraulic system;
the safety valve hydraulic control main circuit comprises an aboveground safety valve hydraulic control branch and an underground safety valve hydraulic control branch, the input ends of the aboveground safety valve hydraulic control branch and the underground safety valve hydraulic control branch are connected with the output end of the high-pressure hydraulic system, the output end of the aboveground safety valve hydraulic control branch is connected to an aboveground safety valve, and the output end of the underground safety valve hydraulic control branch is connected to an underground safety valve;
the input end of the fusible plug control branch is connected with the output end of the high-pressure hydraulic system, and the fusible plug control branch is connected with the hydraulic control branch of the safety valve on the well and the hydraulic control branch of the safety valve under the well through the pilot control branch of the safety valve; and the number of the first and second groups,
the upper computer control system is connected with the high-pressure hydraulic system, the hydraulic control branch of the aboveground safety valve, the hydraulic control branch of the underground safety valve and the sensors in the fusible plug control branch, and meanwhile, the upper computer control system is connected with a power element in the high-pressure hydraulic system and an execution element in the pilot control branch of the safety valve.
Further, the high-pressure hydraulic system comprises, in series: the output end of the first pressure regulating valve is respectively connected with the input ends of the hydraulic control branch of the aboveground safety valve and the hydraulic control branch of the underground safety valve;
the electric hydraulic pump and the first pressure transmitter are connected with the upper computer control system.
Further, the aboveground relief valve hydraulically controlled branch includes that series connection in proper order: the input end of the first flowmeter is connected with a first pressure regulating valve of the high-pressure hydraulic system, and the output end of the third pressure transmitter is connected to a safety valve on the well to be controlled;
the hydraulic control branch of the aboveground safety valve further comprises a second flow meter, one end of the second flow meter is connected with the oil return port of the first pilot valve, and the other end of the second flow meter is connected to an oil tank of the high-pressure hydraulic system;
and the first flowmeter, the second flowmeter and the third pressure transmitter are all connected with the upper computer control system.
Further, the relief valve hydraulically controlled branch in pit includes that series connection in proper order: the input end of the third flowmeter is connected with a first pressure regulating valve of the high-pressure hydraulic system, and the output end of the fourth pressure transmitter is connected to an underground safety valve of a controlled object;
the hydraulic control branch of the underground safety valve further comprises a fourth flowmeter, one end of the fourth flowmeter is connected with an oil return port of the second pilot valve, and the other end of the fourth flowmeter is connected to an oil tank of the high-pressure hydraulic system;
and the third flowmeter, the fourth flowmeter and the fourth pressure transmitter are all connected with the upper computer control system.
Further, the fusible plug control branch comprises in series in sequence: the input end of the second pressure regulating valve is connected to a connecting pipeline between the first pressure transmitter and the energy accumulator of the high-pressure hydraulic system and is used as a pressure source of the low-pressure control system;
the fusible plug control branch also comprises a reversing valve and a damping hole, and the reversing valve, the damping hole and the inflation valve form a self-locking loop;
after the inflation valve is pressed down, the fusible plug control branch circuit automatically supplements pressure through the self-locking loop; when a fire disaster occurs at a well mouth, the fusible plug is melted, so that the fusible plug control branch is decompressed, and the underground safety valve and the aboveground safety valve are switched off through the safety valve pilot control branch;
and the second pressure transmitter is connected with the upper computer control system.
Further, the safety valve pilot control branch comprises an aboveground safety valve pilot control branch and a downhole safety valve pilot control branch, the aboveground safety valve pilot control branch comprises a second electromagnetic valve, and the downhole safety valve pilot control branch comprises a first electromagnetic valve and a time delay valve;
the input end of the first electromagnetic valve is connected to a connecting pipeline between a second safety valve of the fusible plug control branch and the inflation valve, the output end of the first electromagnetic valve is divided into two paths, one path is connected with the input end of the second electromagnetic valve, and the other path is connected with the input end of the delay valve; the output end of the second electromagnetic valve is connected to the pilot end of the first pilot valve of the aboveground safety valve hydraulic control branch, and the output end of the delay valve is connected to the pilot end of the second pilot valve of the underground safety valve hydraulic control branch;
and the first electromagnetic valve and the second electromagnetic valve are connected with the upper computer control system.
The invention has the beneficial effects that: the intelligent wellhead safety control system with the flow monitoring function solves the technical problems of safety valve leakage and valve opening degree judgment, improves the safety production operation of the wellhead safety control system on an oil field through real-time monitoring of the upper computer and the flowmeter, realizes early warning of wellhead leakage points with high precision, improves the timeliness of equipment maintenance, realizes intelligent remote control and monitoring of the wellhead safety control system, makes foundation preparation for realizing digital intelligent oil fields, and finally improves the oil field yield due to reduction of production stop loss caused by leakage.
Drawings
FIG. 1: the invention relates to a schematic diagram of an intelligent wellhead safety control system with flow monitoring.
The attached drawings are marked as follows:
1-oil tank; 2-electric hydraulic pump;
3-one-way valve; 4-first relief valve;
5-first pressure transmitter; 6-an accumulator;
7-first pressure regulating valve; 8-a second pressure regulating valve;
9-second relief valve; 10-inflation valve;
11-a second pressure transmitter; 12-fusible plug;
13-a reversing valve; 14-a damping orifice;
15-first solenoid valve; 16-second electromagnetic valve;
17-first flow meter; 18-first pilot valve;
19-third pressure transmitter; 20-an uphole safety valve;
21-second flow meter; 22-third flow meter;
23-time delay valve; 24-a second pilot valve;
25-fourth pressure transmitter; 26-downhole safety valve;
27-fourth flow meter; 28-upper computer control system.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1, the intelligent wellhead safety control system with flow monitoring comprises a high-pressure hydraulic system, a safety valve hydraulic control main line, a low-pressure control system and an upper computer control system 28.
The high-pressure hydraulic system comprises the following components in series connection in sequence: the hydraulic control system comprises an oil tank 1, an electric hydraulic pump 2, a one-way valve 3, a first safety valve 4, a first pressure transmitter 5, an energy accumulator 6 and a first pressure regulating valve 7, wherein the output end of the first pressure regulating valve 7 is respectively connected with the input ends of an aboveground safety valve hydraulic control branch and an underground safety valve hydraulic control branch.
The safety valve hydraulic control main circuit comprises an aboveground safety valve hydraulic control branch and an underground safety valve hydraulic control branch, the input ends of the aboveground safety valve hydraulic control branch and the underground safety valve hydraulic control branch are connected with the output end of the high-pressure hydraulic system, the output end of the aboveground safety valve hydraulic control branch is connected to the aboveground safety valve 20, and the output end of the underground safety valve hydraulic control branch is connected to the underground safety valve 26.
Wherein, aboveground relief valve liquid accuse branch road is including establishing ties in proper order: the system comprises a first flow meter 17, a first pilot valve 18 and a third pressure transmitter 19, wherein the input end of the first flow meter 17 is connected with a first pressure regulating valve 7 of the high-pressure hydraulic system, and the output end of the third pressure transmitter 19 is connected to a controlled object well safety valve 20. The hydraulic control branch of the aboveground safety valve further comprises a second flow meter 21, one end of the second flow meter 21 is connected with the oil return port of the first pilot valve 18, and the other end of the second flow meter is connected to the oil tank 1 of the high-pressure hydraulic system.
Wherein, relief valve liquid accuse branch in pit includes that series connection in proper order: the system comprises a third flow meter 22, a second pilot valve 24 and a fourth pressure transmitter 25, wherein the input end of the third flow meter 22 is connected with the first pressure regulating valve 7 of the high-pressure hydraulic system, and the output end of the fourth pressure transmitter 25 is connected to a controlled object downhole safety valve 26. The hydraulic control branch of the downhole safety valve further comprises a fourth flow meter 27, one end of the fourth flow meter 27 is connected with the oil return port of the second pilot valve 24, and the other end of the fourth flow meter 27 is connected to the oil tank 1 of the high-pressure hydraulic system.
The low-pressure control system comprises an fusible plug control branch and a safety valve pilot control branch (comprising an aboveground safety valve pilot control branch and an underground safety valve pilot control branch), the input end of the fusible plug control branch is connected with the output end of the high-pressure hydraulic system, and the fusible plug control branch is connected with the aboveground safety valve hydraulic control branch and the underground safety valve hydraulic control branch through the safety valve pilot control branch.
Wherein, fusible plug control branch road is including establishing ties in proper order: the input end of the second pressure regulating valve 8 is connected to a connecting pipeline between the first pressure transmitter 5 and the accumulator 6 of the high-pressure hydraulic system to serve as a pressure source of the low-pressure control system. The fusible plug control branch also comprises a reversing valve 13 and a damping hole 14, and the reversing valve 13, the damping hole 14 and the inflation valve 10 form a self-locking loop; the oil return port of the reversing valve 13 is connected to the oil tank 1 of the high-pressure hydraulic system. After the inflation valve 10 is pressed down, the fusible plug control branch automatically performs micro pressure supplement through the self-locking loop; when a fire alarm occurs at a wellhead, the fusible plug 12 is melted, so that the fusible plug control branch is decompressed, and the underground safety valve 26 and the aboveground safety valve 20 are turned off through the safety valve pilot control branch, wherein the aboveground safety valve 20 is turned off firstly, and the underground safety valve 26 is turned off in a delayed mode through the delay valve 23 in the underground safety valve pilot control branch.
The pilot control branch of the safety valve comprises an aboveground safety valve pilot control branch and a downhole safety valve pilot control branch, the aboveground safety valve pilot control branch comprises a second electromagnetic valve 16, and the downhole safety valve pilot control branch comprises a first electromagnetic valve 15 and a delay valve 23. The first electromagnetic valve 15 and the second electromagnetic valve 16 are sequentially connected in series and are respectively used as starting ends of the underground safety valve hydraulic control branch and the aboveground safety valve hydraulic control branch.
The input end of the first electromagnetic valve 15 is connected to a connecting pipeline between the second safety valve 9 and the inflation valve 10 of the fusible plug control branch, the output end of the first electromagnetic valve 15 is divided into two paths, one path is connected with the input end of the second electromagnetic valve 16, and the other path is connected with the input end of the delay valve 23; the output end of the second electromagnetic valve 16 is connected to the pilot end of the first pilot valve 18 of the uphole safety valve hydraulic control branch, and the output end of the delay valve 23 is connected to the pilot end of the second pilot valve 24 of the downhole safety valve hydraulic control branch. The oil return ports of the first electromagnetic valve 15 and the second electromagnetic valve 16 are connected to the oil tank 1 of the high-pressure hydraulic system.
The upper computer control system 28 is connected with the first pressure transmitter 5 and the electric hydraulic pump 2 in the high-pressure hydraulic system, connected with the first flowmeter 17, the second flowmeter 21 and the third pressure transmitter 19 in the pilot-controlled branch of the aboveground safety valve, connected with the third flowmeter 22, the fourth flowmeter 27 and the fourth pressure transmitter 25 in the pilot-controlled branch of the underground safety valve, connected with the second pressure transmitter 11 in the fusible plug control branch, connected with the second electromagnetic valve 16 in the pilot-controlled branch of the aboveground safety valve and connected with the first electromagnetic valve 15 in the pilot-controlled branch of the underground safety valve. The first flowmeter 17, the second flowmeter 21, the third flowmeter 22, the fourth flowmeter 27, the first pressure transmitter 5, the second pressure transmitter 11, the third pressure transmitter 19 and the fourth pressure transmitter 25 upload analog quantity signals to the upper computer control system 28, the upper computer control system 28 monitors pressure and flow, the accumulated monitoring of the flow of the oil supply path and the oil return path is carried out, the leakage amount is calculated for feedback alarm, meanwhile, the opening degree of the valve is judged according to the accumulated flow, and once leakage occurs, the upper computer control system 28 realizes the remote operation of opening and closing the aboveground safety valve 20 and the underground safety valve 26 through the first electromagnetic valve 15 and the second electromagnetic valve 16; the electric hydraulic pump 2 is started and stopped by the upper computer control system 28.
In conclusion, the intelligent wellhead safety control system with the flow monitoring function solves the technical problems of safety valve leakage and valve opening judgment, and realizes intelligent control of a wellhead control disc. The invention meets the requirements of oil and gas field development and production.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (6)
1. The utility model provides a take flow monitoring's intelligent well head safety control system which characterized in that includes:
a high pressure hydraulic system;
the safety valve hydraulic control main circuit comprises an aboveground safety valve hydraulic control branch and an underground safety valve hydraulic control branch, the input ends of the aboveground safety valve hydraulic control branch and the underground safety valve hydraulic control branch are connected with the output end of the high-pressure hydraulic system, the output end of the aboveground safety valve hydraulic control branch is connected to an aboveground safety valve (20), and the output end of the underground safety valve hydraulic control branch is connected to an underground safety valve (26);
the input end of the fusible plug control branch is connected with the output end of the high-pressure hydraulic system, and the fusible plug control branch is connected with the hydraulic control branch of the safety valve on the well and the hydraulic control branch of the safety valve under the well through the pilot control branch of the safety valve; and the number of the first and second groups,
and the upper computer control system (28) is connected with the sensors in the high-pressure hydraulic system, the hydraulic control branch of the aboveground safety valve, the hydraulic control branch of the underground safety valve and the fusible plug control branch, and meanwhile, the upper computer control system (28) is connected with a power element in the high-pressure hydraulic system and an execution element in the pilot control branch of the safety valve.
2. The intelligent wellhead safety control system with flow monitoring of claim 1, characterized in that the high pressure hydraulic system comprises in series in turn: the hydraulic control system comprises an oil tank (1), an electric hydraulic pump (2), a one-way valve (3), a first safety valve (4), a first pressure transmitter (5), an energy accumulator (6) and a first pressure regulating valve (7), wherein the output end of the first pressure regulating valve (7) is respectively connected with the input ends of an aboveground safety valve hydraulic control branch and an underground safety valve hydraulic control branch;
the electric hydraulic pump (2) and the first pressure transmitter (5) are connected with the upper computer control system (28).
3. The intelligent wellhead safety control system with flow monitoring of claim 1, wherein the hydraulic branch of the aboveground safety valve comprises in series: the input end of the first flowmeter (17) is connected with a first pressure regulating valve (7) of the high-pressure hydraulic system, and the output end of the third pressure transmitter (19) is connected to a safety valve (20) on the well to be controlled;
the hydraulic control branch of the aboveground safety valve further comprises a second flow meter (21), one end of the second flow meter (21) is connected with an oil return port of the first pilot valve (18), and the other end of the second flow meter is connected to an oil tank (1) of the high-pressure hydraulic system;
the first flowmeter (17), the second flowmeter (21) and the third pressure transmitter (19) are connected with the upper computer control system (28).
4. The intelligent wellhead safety control system with flow monitoring of claim 1, wherein the hydraulic control branch of the downhole safety valve comprises in series: the input end of the third flow meter (22) is connected with a first pressure regulating valve (7) of the high-pressure hydraulic system, and the output end of the fourth pressure transmitter (25) is connected to a controlled object underground safety valve (26);
the hydraulic control branch of the underground safety valve further comprises a fourth flow meter (27), one end of the fourth flow meter (27) is connected with an oil return port of the second pilot valve (24), and the other end of the fourth flow meter is connected to an oil tank (1) of the high-pressure hydraulic system;
the third flowmeter (22), the fourth flowmeter (27) and the fourth pressure transmitter (25) are all connected with the upper computer control system (28).
5. The intelligent wellhead safety control system with flow monitoring of claim 1, wherein the fusible plug control branch comprises in series in sequence: the input end of the second pressure regulating valve (8) is connected to a connecting pipeline between a first pressure transmitter (5) and an energy accumulator (6) of the high-pressure hydraulic system to serve as a pressure source of the low-pressure control system;
the fusible plug control branch also comprises a reversing valve (13) and a damping hole (14), and the reversing valve (13), the damping hole (14) and the inflation valve (10) form a self-locking loop;
after the inflation valve (10) is pressed down, the fusible plug control branch circuit automatically supplements pressure through the self-locking loop; when a fire disaster occurs at a well mouth, the fusible plug (12) is melted, so that the fusible plug control branch is decompressed, and the underground safety valve (26) and the aboveground safety valve (20) are switched off through the safety valve pilot control branch;
wherein the second pressure transmitter (11) is connected with the upper computer control system (28).
6. The intelligent wellhead safety control system with flow monitoring of claim 1, characterized in that the safety valve pilot control branch comprises an uphole safety valve pilot control branch and a downhole safety valve pilot control branch, the uphole safety valve pilot control branch comprises a second solenoid valve (16), the downhole safety valve pilot control branch comprises a first solenoid valve (15) and a time delay valve (23);
the input end of the first electromagnetic valve (15) is connected to a connecting pipeline between a second safety valve (9) and an inflation valve (10) of the fusible plug control branch, the output end of the first electromagnetic valve (15) is divided into two paths, one path is connected with the input end of the second electromagnetic valve (16), and the other path is connected with the input end of the time delay valve (23); the output end of the second electromagnetic valve (16) is connected to the pilot end of a first pilot valve (18) of the aboveground safety valve hydraulic control branch, and the output end of the delay valve (23) is connected to the pilot end of a second pilot valve (24) of the underground safety valve hydraulic control branch;
the first electromagnetic valve (15) and the second electromagnetic valve (16) are connected with the upper computer control system (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010563969.5A CN111720093A (en) | 2020-06-19 | 2020-06-19 | Intelligent wellhead safety control system with flow monitoring function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010563969.5A CN111720093A (en) | 2020-06-19 | 2020-06-19 | Intelligent wellhead safety control system with flow monitoring function |
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| CN111720093A true CN111720093A (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010563969.5A Pending CN111720093A (en) | 2020-06-19 | 2020-06-19 | Intelligent wellhead safety control system with flow monitoring function |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503225A (en) * | 2021-02-05 | 2021-03-16 | 成都迈可森流体控制设备有限公司 | Tank root valve hydraulic system suitable for emergency fire |
| CN116291311A (en) * | 2023-02-24 | 2023-06-23 | 南通华兴石油仪器有限公司 | Wellhead safety valve control system |
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| US20190360637A1 (en) * | 2018-05-25 | 2019-11-28 | Gjr Meyer Service, Inc. | Lubrication flow meter |
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| US8985202B2 (en) * | 2012-05-29 | 2015-03-24 | P.V. Flood Control Corp. | System for containment, measurement, and reuse of fluids in hydraulic fracturing |
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| US20190360637A1 (en) * | 2018-05-25 | 2019-11-28 | Gjr Meyer Service, Inc. | Lubrication flow meter |
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| CN112503225A (en) * | 2021-02-05 | 2021-03-16 | 成都迈可森流体控制设备有限公司 | Tank root valve hydraulic system suitable for emergency fire |
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Application publication date: 20200929 |
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