CN111237641A - Intelligent control system for gas storage wellhead - Google Patents
Intelligent control system for gas storage wellhead Download PDFInfo
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- CN111237641A CN111237641A CN201911411728.2A CN201911411728A CN111237641A CN 111237641 A CN111237641 A CN 111237641A CN 201911411728 A CN201911411728 A CN 201911411728A CN 111237641 A CN111237641 A CN 111237641A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
Abstract
The invention provides an intelligent control system for a gas storage wellhead, which comprises: the system comprises an SIS system, a driving force control pipeline, an underground safety valve driving pipeline, a ground safety valve driving pipeline, an emergency shut-off valve driving pipeline and a low-pressure control pipeline; the output end of the driving force control pipeline is respectively connected with the input ends of the underground safety valve driving pipeline and the ground safety valve driving pipeline; the downhole safety valve driving pipeline comprises a first pilot control valve; the ground safety valve driving pipeline comprises a first pressure regulating valve, a second one-way valve and a second pilot control valve which are sequentially connected in series; the emergency shut-off valve driving pipeline comprises a fourth pressure gauge, a third one-way valve, a third pilot control valve and a fourth pilot control valve which are sequentially connected in series. The invention adopts the SIS system, and realizes corresponding logic control through data acquisition and analysis, thereby realizing stable and reliable intelligent control of the gas storage wellhead.
Description
Technical Field
The invention relates to the technical field of gas storage wellhead control, in particular to an intelligent gas storage wellhead control system.
Background
The underground gas storage is a peak regulation facility for solving the contradiction between supply and demand of natural gas, and also plays a strategic storage role in guaranteeing national energy safety. Therefore, the requirement of the underground gas storage is higher than that of a conventional production well mouth, China starts late in the aspect of underground gas storage construction, an underground gas storage construction ground well mouth control system does not have corresponding standards and specifications, the underground gas storage construction ground well mouth control system is improved mostly by referring to the mode of a conventional production well, well mouth control equipment is dispersed, integrated control cannot be achieved, logical linkage between the equipment cannot be achieved, and the requirement of intelligent control cannot be met. The equipment reliability is low, the safety level can not meet the standard requirement, and the production requirement of the underground gas storage can not be met.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an intelligent control system for a gas storage wellhead, which comprises: the system comprises an SIS system, a main power control loop, an underground safety valve driving pipeline loop, a ground safety valve driving pipeline loop, an emergency shut-off valve driving loop and a low-pressure control loop;
the output end of the driving force control loop is respectively connected with the input ends of the underground safety valve driving loop and the ground safety valve driving loop;
the driving circuit of the downhole safety valve comprises a first one-way valve (31), a first energy storage device (32), a first pilot control valve (33), a second pressure gauge (35), a downhole safety valve (36) and a second pressure transmitter (34), wherein the first one-way valve, the first energy storage device, the first pilot control valve (33), the second pressure gauge (35) and the downhole safety valve are sequentially connected in series, one end of the second pressure transmitter is connected to a pipeline between the first pilot control valve and the second pressure gauge, and the other end of;
the ground safety valve driving circuit comprises a first pressure regulating valve (41), a second one-way valve (42), a second pilot control valve (43), a third pressure gauge (45), a ground safety valve (46) and a third pressure transmitter (44), wherein the first pressure regulating valve, the second one-way valve, the second pilot control valve, the third pressure gauge and the ground safety valve are sequentially connected in series, one end of the third pressure transmitter is connected to a pipeline between the second pilot control valve and the third pressure gauge, and the other end of the third pressure transmitter is;
the input end of the emergency shutdown valve driving circuit is arranged between the first pressure regulating valve (41) and the second one-way valve (42), the emergency shutdown valve driving circuit comprises a fourth pressure gauge (52), a third one-way valve (53), a third pilot control valve (54), a fourth pilot control valve (55), a fifth pressure gauge (57) and an emergency shutdown valve (58) which are sequentially connected in series, and a fourth pressure transmitter (56) with one end connected to a pipeline between the fourth pilot control valve and the fifth pressure gauge and the other end connected to the SIS system;
the input end of the low-pressure control loop is arranged between the first pressure regulating valve (41) and the second one-way valve (42), and the output end of the low-pressure control loop is respectively connected with the input ends of the pilot control loop of the underground safety valve and the pilot control loop of the ground safety valve.
Furthermore, the low-pressure control circuit comprises a second pressure regulating valve (61), a fourth one-way valve (62), a third energy accumulator (63), a sixth pressure gauge (64) and a first electromagnetic valve (65) which are connected in sequence; the pilot control loop of the downhole safety valve comprises a first delay valve (71), and the output end of the first delay valve (71) is connected with the pilot end of the first pilot control valve (33); the ground safety valve pilot control loop comprises a second battery valve (72) and a second delay valve (721) which are connected, and the output end of the second delay valve (721) is connected with the pilot end of the second pilot control valve (43).
The emergency shut-off valve pilot control circuit comprises a third electromagnetic valve (73) and a fourth electromagnetic valve (74) which are arranged in parallel, the input ends of the third electromagnetic valve (73) and the fourth electromagnetic valve (74) are arranged between the second electromagnetic valve (72) and the second delay valve (721), the output end of the third electromagnetic valve (73) is connected with the pilot end of the third pilot control valve (54), and the output end of the fourth electromagnetic valve (74) is connected with the pilot end of the fourth pilot control valve (55).
Further, still include the fusible plug return circuit, the input setting in fusible plug return circuit is in between sixth manometer (64) and first solenoid valve (65), the fusible plug return circuit is including consecutive fifth pilot control valve (83), choke valve (84), pressure switch (85), fusible plug (86), still including detecting the pilot control return circuit, the input setting that detects the pilot control return circuit is in between sixth manometer (64) and fifth pilot control valve (83), the output with the pilot end of fifth pilot control valve (83) links to each other, it includes continuous pressure charging valve (81), check valve (82) to detect the pilot control return circuit.
Further, the main power control loop comprises an oil tank (1), a first electric pump (21), a first pressure transmitter (22) and a first pressure gauge (23) which are sequentially connected in series, and the first electric pump (21) and the first pressure transmitter (22) are connected with the SIS system.
Further, the system also comprises a second electric pump (24), one end of the second electric pump (24) is connected with the oil tank (1), the other end of the second electric pump is connected with the first pressure transmitter (22), and the second electric pump (24) is connected with the SIS system.
Further, the oil tank further comprises a manual pump (25), one end of the manual pump (25) is connected with the oil tank (1), and the other end of the manual pump is connected with the first pressure transmitter (22).
Furthermore, a second energy accumulator (51) is arranged between the first pressure regulating valve (41) and the second one-way valve (42).
Furthermore, the output end of the emergency shut-off valve (58) is provided with a fifth pressure transmitter (59), a sixth pressure transmitter (510) and a seventh pressure transmitter (511) which are connected in sequence, and the fifth pressure transmitter (59), the sixth pressure transmitter (510) and the seventh pressure transmitter (511) are respectively connected with the SIS system.
According to the invention, the SIS system is adopted, and corresponding logic control is realized through data acquisition and analysis, so that stable and reliable intelligent control of a gas storage wellhead is realized; the main power control circuit is used for providing hydraulic power required by the system; the output end of the emergency shut-off valve is provided with three pressure transmitters, the condition for shutting off the emergency shut-off valve is judged by adopting 2-out-of-3 voting logic, the safety level of SIL2 is achieved, the shut-off time is 3S, and the high-reliability protection function is realized.
The underground safety valve driving loop provides driving force for opening of the underground safety valve, the underground safety valve pilot control loop provides pilot conditions for opening and closing of the underground safety valve, in the production process, low pressure provided by the underground safety valve pilot control loop drives a pilot end of a first pilot control valve to enable an inlet and an outlet of the first pilot control valve to be communicated, and high pressure drives hydraulic oil to be output to the underground safety valve to enable the underground safety valve to be opened; after production is finished, due to the fact that the system is powered off, the pressure of the pilot end of the first pilot control valve is released, the inlet and the outlet of the first pilot control valve are not communicated, and the underground safety valve is automatically closed due to the fact that the pressure is lost.
The ground safety valve driving circuit provides driving force for opening the ground main safety valve, the ground safety valve pilot control circuit provides pilot conditions for opening and closing the ground main safety valve, in the production process, low pressure provided by the ground safety valve pilot control circuit drives a pilot end of a second pilot control valve to enable an inlet and an outlet of the second pilot control valve to be communicated, and medium pressure drives hydraulic oil to be output to the ground safety valve to enable the ground safety valve to be opened; after production is finished, the pressure of the pilot end of the second pilot control valve is released, the inlet and the outlet of the second pilot control valve are not communicated, and the ground safety valve is closed due to pressure loss.
The emergency shut-off valve driving circuit provides driving force for opening of an emergency shut-off valve, the emergency shut-off valve pilot control circuit provides pilot conditions for opening and closing of a ground emergency shut-off valve, in the production process, low pressure provided by the emergency shut-off valve pilot control circuit drives pilot ends of a third pilot control valve and a fourth pilot control valve to enable inlets and outlets of the third pilot control valve and the fourth pilot control valve to be communicated, and medium pressure drives hydraulic oil to be conveyed to the emergency shut-off valve to enable the emergency shut-off valve to be opened; after production is finished, the pressure of the pilot ends of the third pilot control valve and the fourth pilot control valve is released, the inlets and the outlets of the third pilot control valve and the fourth pilot control valve are not communicated, and the emergency shut-off valve is closed after pressure loss. Wherein the third pilot control valve and the fourth pilot control valve are connected in series, which meets the safety level requirement of the SIL 2.
The second electric pump and the manual pump are used as spare devices for spare time, so that the reliability and the stability of the equipment are improved, and the requirement of continuous production is met.
The fusible plug loop provides safety guarantee for the whole system, when a fire disaster happens, the fusible plug is melted, and when the pressure switch detects that the pressure is lower, the SIS system controls the electrically controlled valve to be closed.
Drawings
FIG. 1 is a schematic diagram of a loop structure of an intelligent control system for a gas storage wellhead provided by the invention;
wherein, 1, an oil tank; 21. a first electric pump; 22. a first pressure transmitter; 23. a first pressure gauge; 24. a second electric pump; 25. a manual pump; 31. a first check valve; 32. a first energy storage; 33. a first pilot control valve; 34. a second pressure transmitter; 35. a second pressure gauge; 36. a downhole safety valve; 41. a first pressure regulating valve; 42. a second one-way valve; 43. a second pilot control valve; 44. a third pressure transmitter; 45. a third pressure gauge; 46. a ground safety valve; 47. a temperature transmitter; 48. a fifth pressure transmitter; 51. a second energy storage; 52. a fourth pressure gauge; 53. a third check valve; 54. a third pilot control valve; 55. a fourth pilot control valve; 56. a fourth pressure transmitter; 57. a fifth pressure gauge; 58. an emergency shut-off valve; 61. a second pressure regulating valve; 62. a fourth check valve; 63. a third energy storage; 64. a sixth pressure gauge; 65. a first solenoid valve; 71. a first time delay valve; 72. a second solenoid valve; 721. a second time delay valve; 73. a third electromagnetic valve; 74. a fourth solenoid valve; 81. a pressure charging valve; 82. a one-way valve; 83. a fifth pilot control valve; 84. a throttle valve; 85. a pressure switch; 86. a fusible plug; 9. SIS systems.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present invention provides an intelligent control system for a gas storage wellhead, comprising: SIS system 9, main power control loop, underground safety valve driving loop, ground safety valve driving loop, emergency shut-off valve driving loop, low pressure control loop, fusible plug loop.
And the output end of the driving force control loop is respectively connected with the input ends of the underground safety valve driving loop and the ground safety valve driving loop. The main power control loop comprises an oil tank 1, a first electric pump 21, a first pressure transmitter 22 and a first pressure gauge 23 which are sequentially connected in series, and further comprises a second electric pump 24 and a manual pump 25 which are connected in parallel, one end of the second electric pump 24 and the manual pump 25 is connected with the oil tank 1, the other end of the second electric pump is connected with the first pressure transmitter 22, and the first electric pump 21, the second electric pump 24 and the first pressure transmitter 22 are connected with the SIS system 9. The second electric pump and the manual pump are used as standby pumps for ensuring continuous production when necessary. The installation mode of the pressure transmitter in the pipeline is a known technology, and in the invention, the same is also true, and the fact that the pressure transmitter is connected with other elements in series in the invention means that the pressure sensing end of the pressure transmitter is connected with other elements in series as one point (the description is not repeated below).
The driving circuit of the downhole safety valve comprises a first one-way valve 31, a first energy storage 32, a first pilot control valve 33, a second pressure transmitter 34, a second pressure gauge 35 and a downhole safety valve 36 which are sequentially connected in series, wherein the second pressure transmitter 34 is connected with the SIS system 9. The second pressure transmitter transmits the sensed pressure to the SIS system in real time.
The ground safety valve driving circuit comprises a first pressure regulating valve 41, a second one-way valve 42, a second pilot control valve 43, a third pressure transmitter 44, a third pressure gauge 45 and a ground safety valve 46 which are sequentially connected in series, wherein the third pressure transmitter 44 is connected with the SIS system 9. A third pressure transmitter transmits the sensed pressure to the SIS system in real time.
The input end of the emergency shutdown valve driving circuit is arranged between the first pressure regulating valve 41 and the second one-way valve 42, the emergency shutdown valve driving circuit comprises a fourth pressure gauge 52, a third one-way valve 53, a third pilot control valve 54, a fourth pilot control valve 55, a fourth pressure transmitter 56, a fifth pressure gauge 57 and an emergency shutdown valve 58 which are sequentially connected in series, and the fourth pressure transmitter 56 is connected with the SIS system. The output end of the emergency shut-off valve 58 is provided with a fifth pressure transmitter 59, a sixth pressure transmitter 510 and a seventh pressure transmitter 511 which are connected in sequence, and the fifth pressure transmitter 59, the sixth pressure transmitter 510 and the seventh pressure transmitter 511 are respectively connected with the SIS system. The output end of the emergency shut-off valve is provided with three pressure transmitters, the condition for shutting off the emergency shut-off valve is judged by adopting 2-out-of-3 voting logic, the safety level of SIL2 is achieved, the shut-off time is 3S, and the high-reliability protection function is realized.
The input end of the low-pressure control loop is arranged between the first pressure regulating valve 41 and the second one-way valve 42, and the output end of the low-pressure control loop is respectively connected with the input ends of the pilot control loop of the downhole safety valve and the pilot control loop of the surface safety valve; the low-pressure control loop comprises a second pressure regulating valve 61, a fourth one-way valve 62, a third energy accumulator 63, a sixth pressure gauge 64 and a first electromagnetic valve 65 which are connected in sequence; the pilot control loop of the downhole safety valve comprises a first delay valve 71, and the output end of the first delay valve 71 is connected with the pilot end of the first pilot control valve 33; the surface safety valve pilot control loop comprises a second electromagnetic valve 72 and a second delay valve 721 which are connected, and the output end of the second delay valve 721 is connected with the pilot end of the second pilot control valve 43. The emergency shutdown valve pilot control circuit comprises a third electromagnetic valve 73 and a fourth electromagnetic valve 74 which are arranged in parallel, the input ends of the third electromagnetic valve 73 and the fourth electromagnetic valve 74 are arranged between the second electromagnetic valve 72 and the second delay valve 721, the output end of the third electromagnetic valve 73 is connected with the pilot end of the third pilot control valve 54, and the output end of the fourth electromagnetic valve 74 is connected with the pilot end of the fourth pilot control valve 55. The first solenoid valve 65, the second solenoid valve 72, the third solenoid valve 73, and the fourth solenoid valve 74 are connected to the SIS system 9.
The input end of the fusible plug loop is arranged between the sixth pressure gauge 64 and the first electromagnetic valve 65, the fusible plug loop comprises a fifth pilot control valve 83, a throttle valve 84, a pressure switch 85 and a fusible plug 86 which are sequentially connected, and the pressure switch 85 is connected with the SIS system 9; the pressure measuring device further comprises a detection pilot control loop, the input end of the detection pilot control loop is arranged between the sixth pressure gauge 64 and the fifth pilot control valve 83, the output end of the detection pilot control loop is connected with the pilot end of the fifth pilot control valve 83, and the detection pilot control loop comprises a pressure charging valve 81 and a check valve 82 which are connected.
Further, a second accumulator 51 is provided between the first pressure regulating valve 41 and the second check valve 42. After the first pressure regulating valve 41 regulates the pressure, the second accumulator 51 helps to stabilize the pressure and provide emergency oil supply.
Further, a temperature transmitter 47 and a fifth pressure transmitter 48 are sequentially arranged between the ground safety valve 46 and the emergency shut-off valve 58, and the temperature transmitter 47 and the fifth pressure transmitter 48 are connected with the SIS system 9.
The working principle of the invention is as follows:
starting the first electric pump and other electrically controllable devices, wherein the pressure output by the first electric pump 21 is about 70MPa, and the underground safety valve driving loop is used for conveying the high-pressure driving liquid about 70MPa to the inlet of the first pilot control valve 33, at the moment, the inlet and the outlet of the first pilot control valve are not communicated, and the high-pressure driving liquid cannot reach the underground safety valve 36; a ground safety valve driving circuit, wherein the first pressure regulating valve 41 reduces the high pressure of about 70MPa to the medium pressure of about 21MPa, the reduced medium pressure driving liquid is conveyed to the inlet of the second pilot control valve 43, at the moment, the inlet and the outlet of the second pilot control valve are not communicated, and the medium pressure driving liquid cannot reach the ground safety valve 46; a low pressure control circuit, the second pressure regulating valve 61 further reduces the medium pressure of about 21MPa to a low pressure of about 0.7MPa, the low pressure control liquid output by the second pressure regulating valve 61 is transmitted to the first delay valve 71 through the first electromagnetic valve 65, the inlet and the outlet of the first pilot control valve 33 are driven to be communicated, and the high pressure driving liquid is transmitted to the downhole safety valve 36, so that the downhole safety valve 36 is opened; the low pressure control fluid is transmitted to the second delay valve 721 via the second solenoid valve 72, and drives the inlet and outlet of the second pilot control valve 43 to be conducted, and the medium pressure driving fluid reaches the surface safety valve 46, so that the surface safety valve is opened.
An emergency shut-off valve driving circuit, in which the medium-pressure driving liquid is delivered to the inlet of the third pilot control valve 54, at this time, the inlets and outlets of the third pilot control valve and the fourth pilot control valve are not communicated, and the medium-pressure driving liquid cannot reach the emergency shut-off valve 58; the low-pressure control fluid is sent to the third solenoid valve 73 to drive the inlet and outlet of the third pilot control valve 54 to be communicated, the low-pressure control fluid is sent to the fourth solenoid valve 74 to drive the inlet and outlet of the fourth pilot control valve 55 to be communicated, the medium-pressure drive fluid two reaches the emergency shut-off valve 58, and the emergency shut-off valve is opened.
In the fusible plug loop, the low-pressure control hydraulic oil reaches the charging valve 81 and the inlet of the fifth pilot control valve 83, at this time, the inlet and the outlet of the fifth pilot control valve 83 are not communicated, so the low-pressure control hydraulic oil flows to the check valve 82 through the charging valve 81, further the inlet and the outlet of the fifth pilot control valve 83 are driven to be communicated, the low-pressure control hydraulic oil is conveyed to the throttle valve 84 through the fifth pilot control valve 83, further flows to the pressure switch 85 and the fusible plug 86, and the pressure switch 85 transmits the detected pressure to the SIS system 9. When a fire occurs, the fusible plug 86 is melted, the pressure of the fusible plug loop is reduced, and when the pressure switch 85 detects the pressure reduction, the SIS system 9 controls the electrically controllable valve to be closed, so that the safety of the system is ensured. After the production work is finished, the SIS system 9 controls the electrically controllable valve to be closed.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a gas storage well head intelligence control system which characterized in that includes: the system comprises an SIS system, a main power control loop, an underground safety valve driving pipeline loop, a ground safety valve driving pipeline loop, an emergency shut-off valve driving loop and a low-pressure control loop;
the output end of the driving force control loop is respectively connected with the input ends of the underground safety valve driving loop and the ground safety valve driving loop;
the driving circuit of the downhole safety valve comprises a first one-way valve (31), a first energy storage device (32), a first pilot control valve (33), a second pressure gauge (35), a downhole safety valve (36) and a second pressure transmitter (34), wherein the first one-way valve, the first energy storage device, the first pilot control valve (33), the second pressure gauge (35) and the downhole safety valve are sequentially connected in series, one end of the second pressure transmitter is connected to a pipeline between the first pilot control valve and the second pressure gauge, and the other end of;
the ground safety valve driving circuit comprises a first pressure regulating valve (41), a second one-way valve (42), a second pilot control valve (43), a third pressure gauge (45), a ground safety valve (46) and a third pressure transmitter (44), wherein the first pressure regulating valve, the second one-way valve, the second pilot control valve, the third pressure gauge and the ground safety valve are sequentially connected in series, one end of the third pressure transmitter is connected to a pipeline between the second pilot control valve and the third pressure gauge, and the other end of the third pressure transmitter is;
the input end of the emergency shutdown valve driving circuit is arranged between the first pressure regulating valve (41) and the second one-way valve (42), the emergency shutdown valve driving circuit comprises a fourth pressure gauge (52), a third one-way valve (53), a third pilot control valve (54), a fourth pilot control valve (55), a fifth pressure gauge (57) and an emergency shutdown valve (58) which are sequentially connected in series, and a fourth pressure transmitter (56) with one end connected to a pipeline between the fourth pilot control valve and the fifth pressure gauge and the other end connected to the SIS system;
the input end of the low-pressure control loop is arranged between the first pressure regulating valve (41) and the second one-way valve (42), and the output end of the low-pressure control loop is respectively connected with the input ends of the pilot control loop of the underground safety valve and the pilot control loop of the ground safety valve.
2. The intelligent control system for the wellhead of the gas storage reservoir as claimed in claim 1, wherein the low-pressure control loop comprises a second pressure regulating valve (61), a fourth one-way valve (62), a third energy storage device (63), a sixth pressure gauge (64) and a first electromagnetic valve (65) which are connected in sequence; the pilot control loop of the downhole safety valve comprises a first delay valve (71), and the output end of the first delay valve (71) is connected with the pilot end of the first pilot control valve (33); the ground safety valve pilot control loop comprises a second electromagnetic valve (72) and a second delay valve (721) which are connected, and the output end of the second delay valve (721) is connected with the pilot end of the second pilot control valve (43).
3. The intelligent control system for the wellhead of the gas storage tank is characterized by further comprising an emergency shutdown valve pilot control loop, wherein the emergency shutdown valve pilot control loop comprises a third electromagnetic valve (73) and a fourth electromagnetic valve (74) which are arranged in parallel, input ends of the third electromagnetic valve (73) and the fourth electromagnetic valve (74) are arranged between the second electromagnetic valve (72) and a second time delay valve (721), an output end of the third electromagnetic valve (73) is connected with a pilot end of the third pilot control valve (54), and an output end of the fourth electromagnetic valve (74) is connected with a pilot end of the fourth pilot control valve (55).
4. The intelligent control system for the wellhead of the gas storage according to claim 2, characterized by further comprising a fusible plug loop, wherein the input end of the fusible plug loop is arranged between the sixth pressure gauge (64) and the first electromagnetic valve (65), the fusible plug loop comprises a fifth pilot control valve (83), a throttle valve (84), a pressure switch (85) and a fusible plug (86) which are sequentially connected, the system further comprises a detection pilot control loop, the input end of the detection pilot control loop is arranged between the sixth pressure gauge (64) and the fifth pilot control valve (83), the output end of the detection pilot control loop is connected with the pilot end of the fifth pilot control valve (83), and the detection pilot control loop comprises a charging valve (81) and a one-way valve (82) which are connected.
5. The intelligent gas storage wellhead control system according to claim 1, wherein the active power control loop comprises a fuel tank (1), a first electric pump (21), a first pressure transmitter (22) and a first pressure gauge (23) which are connected in series in sequence, and the first electric pump (21) and the first pressure transmitter (22) are connected with the SIS system.
6. The intelligent control system for the wellhead of the gas storage according to claim 5, characterized by further comprising a second electric pump (24), wherein one end of the second electric pump (24) is connected with the oil tank (1), the other end is connected with the first pressure transmitter (22), and the second electric pump (24) is connected with the SIS system.
7. The intelligent control system for the wellhead of the gas storage according to claim 6, characterized by further comprising a manual pump (25), wherein one end of the manual pump (25) is connected with the oil tank (1), and the other end is connected with the first pressure transmitter (22).
8. The intelligent control system for the wellhead of the gas storage tank as claimed in claim 1, characterized in that a second energy storage device (51) is further arranged between the first pressure regulating valve (41) and the second one-way valve (42).
9. The intelligent gas storage wellhead control system according to claim 1, characterized in that the output end of the emergency shut-off valve (58) is provided with a fifth pressure transmitter (59), a sixth pressure transmitter (510) and a seventh pressure transmitter (511) which are connected in sequence, and the fifth pressure transmitter (59), the sixth pressure transmitter (510) and the seventh pressure transmitter (511) are respectively connected with the SIS system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411728.2A CN111237641A (en) | 2019-12-31 | 2019-12-31 | Intelligent control system for gas storage wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411728.2A CN111237641A (en) | 2019-12-31 | 2019-12-31 | Intelligent control system for gas storage wellhead |
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| Publication Number | Publication Date |
|---|---|
| CN111237641A true CN111237641A (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911411728.2A Pending CN111237641A (en) | 2019-12-31 | 2019-12-31 | Intelligent control system for gas storage wellhead |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796707A (en) * | 2020-12-31 | 2021-05-14 | 深圳市弗赛特科技股份有限公司 | Unattended intelligent wellhead safety control system and control method thereof |
-
2019
- 2019-12-31 CN CN201911411728.2A patent/CN111237641A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796707A (en) * | 2020-12-31 | 2021-05-14 | 深圳市弗赛特科技股份有限公司 | Unattended intelligent wellhead safety control system and control method thereof |
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