CN111622711A - Miniature underground liquid station system for opening underground safety valve - Google Patents
Miniature underground liquid station system for opening underground safety valve Download PDFInfo
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- CN111622711A CN111622711A CN202010459995.3A CN202010459995A CN111622711A CN 111622711 A CN111622711 A CN 111622711A CN 202010459995 A CN202010459995 A CN 202010459995A CN 111622711 A CN111622711 A CN 111622711A
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- 239000007788 liquid Substances 0.000 title claims abstract description 28
- 239000003921 oil Substances 0.000 claims description 56
- 230000005540 biological transmission Effects 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 13
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 244000309493 Soybean severe stunt virus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008054 signal transmission 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
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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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
- E21B34/16—Control means therefor being outside the borehole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/002—Electrical failure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B2013/0448—Actuation by solenoid and permanent magnet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a miniature underground liquid station system for opening an underground safety valve, belonging to the technical field of underground safety production; the system comprises an aboveground electrical control system, an underground electrical control system and an underground micro liquid station; the underground electric control system is connected with the safety valve through the underground micro liquid station. The underground safety valve is controlled by the underground electric system to open the underground safety valve, so that the problem of control delay of the traditional safety valve is greatly solved, the working state of the underground safety valve is monitored more accurately in real time, the underground potential safety hazard is eliminated, the well repairing operation is avoided, and the underground safe production is facilitated.
Description
Technical Field
The invention relates to a miniature underground liquid station system for opening an underground safety valve, and belongs to the technical field of underground safety production.
Background
An underground Safety Valve (SSSV) (SubSurface Safety Valve) is an underground tool which is arranged in an oil and gas well and can be closed emergently to prevent blowout and ensure the Safety of oil and gas well facilities and production when abnormal conditions such as fire alarm, pipeline breakage, irresistible natural disasters (such as earthquake, ice condition, strong typhoon and the like) and the like occur in production facilities. The underground safety valve can close the oil circuit in emergency when the system is in abnormal condition, so as to prevent blowout, and is a key facility in the oil exploitation completion tool. Traditional subsurface safety valve is through opening and close of aboveground hydraulic system remote control relief valve, and traditional ground control subsurface safety valve's general principle does: the hydraulic pressure is added from the ground, the high-pressure liquid enters the piston cavity through the control pipeline to push the piston to move downwards, the spring is compressed, and the valve plate is jacked open to realize opening; the ground control pressure is kept, namely the opening state is kept; the ground control pressure is released, and the valve plate is reset under the action of the spring to realize closing. The traditional underground safety valve is opened and closed by remotely controlling the safety valve through an aboveground hydraulic system, and the control has certain time delay due to the fact that the oil way is long in transmission distance.
The intelligent composite continuous pipeline widely adopted in the oil well at present is an intelligent pipeline consisting of a non-metallic material multilayer composite base material, a communication wire, a heating wire and a cable which are embedded inside, and a single pipe is as long as several kilometers (without a joint in the middle), so that the well completion and the exploitation operation time can be greatly reduced, the oil extraction efficiency and the benefit can be improved, and the safety of an oil well system can be improved; the development of corresponding matched well completion tools is combined, and the whole set of petroleum system equipment can be upgraded and updated.
Disclosure of Invention
The invention aims to solve the technical problems that the opening and closing of an underground safety valve are controlled remotely through an aboveground hydraulic system in the prior art, an oil path is externally arranged and is connected and bound outside a conveying oil pipe one by one, each oil pipe needs to be bound by a protective cover, the operation efficiency is low, the collision damage risk is high, the well completion and well repair cost is high, and a certain time delay is caused by long-distance hydraulic control due to the long transmission distance of the oil path, and the maintenance is inconvenient.
In order to solve the problems, the technical scheme adopted by the invention is to provide a ground control micro down-hole liquid station control system for opening and closing a down-hole safety valve, which comprises an up-hole electrical control system, a down-hole electrical control system and a down-hole micro liquid station; the underground electric control system is connected with the underground safety valve through the underground micro liquid station.
Preferably, the aboveground electrical control system comprises a computer, a Programmable Logic Controller (PLC) and a power carrier machine I; a first power carrier module is arranged in the first power carrier; and the computer is connected with the first power carrier module through the Programmable Logic Controller (PLC).
Preferably, the downhole electrical control system comprises a second power carrier, a remote data acquisition and transmission module and a relay; and a second power carrier module is arranged in the second power carrier, the second power carrier is connected with one end of the relay through a remote data acquisition and transmission module, and the other end of the relay is connected with the underground micro liquid station.
Preferably, a first power carrier module arranged on the aboveground electrical control system is connected with a second power carrier module arranged on the underground electrical control system through a power line.
Preferably, the underground micro liquid station comprises an oil tank, a motor, a micro plunger pump, an overflow valve, a normally closed first electromagnetic valve, a normally closed second electromagnetic valve, a check valve and a single-action hydraulic cylinder; the single-acting hydraulic cylinder is provided with an oil path inlet, and the oil tank is connected with the oil path inlet arranged on the single-acting hydraulic cylinder through a normally closed electromagnetic valve I; a micro plunger pump is arranged between the oil tank and the normally closed electromagnetic valve I and is connected with a motor; a check valve is arranged between the normally closed electromagnetic valve I and the oil way inlet of the single-action hydraulic cylinder; the oil tank is connected with an oil way inlet arranged on the single-action hydraulic cylinder through a normally closed electromagnetic valve II; an overflow valve is arranged between the oil tank and the normally closed electromagnetic valve I; the motor, the normally closed electromagnetic valve I and the normally closed electromagnetic valve II are connected with the relay; the single-acting hydraulic cylinder is connected with the safety valve.
Preferably, an oil way inlet of the single-acting hydraulic cylinder is provided with a pressure sensor, and the pressure sensor is connected with the underground remote data acquisition and transmission module.
Preferably, a filter is arranged between the oil tank and the micro plunger pump.
The invention also provides a working method of the miniature underground liquid station system for opening and closing the underground safety valve, which comprises the following steps:
step 1: an instruction for opening the safety valve, which is made by the aboveground electrical control system, is transmitted by the aboveground computer through the programmable logic controller PLC and the power carrier machine I, and a signal is transmitted to the underground power carrier machine II through the power line and then transmitted to the motor through the remote data acquisition and transmission module and the relay;
step 2: the motor drives the miniature plunger pump to work, the highest output pressure is about 100Mpa, the normally closed electromagnetic valve is started, hydraulic oil flows into the single-action hydraulic cylinder, the piston rod is pushed to move until the valve clack of the safety valve is opened;
and step 3: when the valve clack of the safety valve is opened, the pressure sensor transmits the pressure value to the ground through the remote data acquisition and transmission module, an instruction is sent out from the ground to close the normally closed solenoid valve I, and an oil way leading to the single-acting hydraulic cylinder is subjected to pressure maintaining through the check valve, so that the valve clack is continuously in an opening state;
and 4, step 4: when the pressure sensor detects that the pressure is reduced, the motor and the miniature plunger pump work, and the normally closed electromagnetic valve is opened for pressure compensation; when the pressure is complemented to the opening pressure of the pressure sensor, the normally closed electromagnetic valve I is closed;
and 5: an instruction for closing the safety valve, which is made by an aboveground electrical control system, is transmitted by an aboveground computer through a Programmable Logic Controller (PLC) and a power line carrier machine I, a signal is transmitted to a downhole power line carrier machine II through a power line, and then transmitted to a normally closed electromagnetic valve I and a normally closed electromagnetic valve II through a remote data acquisition and transmission module and a relay, wherein the normally closed electromagnetic valve I is closed, the normally closed electromagnetic valve II is opened, an oil way is unloaded, and a valve clack of the safety valve is closed; when sudden power failure occurs, the normally closed electromagnetic valve I is closed after power failure, the normally closed electromagnetic valve II is opened under the power supply of the standby power supply, the oil way is unloaded, and the valve clack of the safety valve is closed.
Compared with the prior art, the invention has the following beneficial effects:
the underground safety valve opening system provided by the invention has the advantages that the underground safety valve is opened after the underground liquid station is controlled by the aboveground electrical system, the problem of control delay of the traditional safety valve is greatly solved, the working state of the underground safety valve is more accurately monitored in real time, the underground potential safety hazard is eliminated, and the well repairing operation is avoided.
Drawings
FIG. 1 is a schematic diagram of an overall control structure of a micro down-hole fluid station system for opening a down-hole safety valve according to the present invention;
FIG. 2 is a schematic diagram of the overall control structure of a micro down-hole fluid station system for opening a down-hole safety valve according to the present invention;
FIG. 3 is a schematic diagram of a downhole fluid station of a micro downhole fluid station system for opening a downhole safety valve according to the present invention;
FIG. 4 is a schematic diagram of a miniature downhole fluid station system component for opening a downhole safety valve in accordance with the present invention;
reference numerals: 1. the system comprises a safety valve 2, a downhole fluid station 3, an oil tank 4, a filter 5, a motor 6, a micro plunger pump 7, an overflow valve 8, a normally closed electromagnetic valve I9, a normally closed electromagnetic valve II 10, a check valve 11, a single-action hydraulic cylinder 12, a pressure sensor 13, an aboveground electrical control system 14 and a downhole electrical control system;
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
as shown in fig. 1-4, the present invention provides a micro down-hole liquid station system for opening a down-hole safety valve, comprising an up-hole electrical control system 13, a down-hole electrical control system 14 and a down-hole micro liquid station 2; the aboveground electrical control system 13 is connected with the underground electrical control system 14, and the underground electrical control system 14 is connected with the safety valve 1 through the underground micro liquid station 2. The aboveground electrical control system 13 comprises a computer, a programmable logic controller PLC and a power carrier machine I; a first power carrier module is arranged in the first power carrier; and the computer is connected with the first power carrier module through the Programmable Logic Controller (PLC). The downhole electrical control system 14 comprises a second power carrier machine, a remote data acquisition and transmission module (remote I/O) and a relay; and a second power carrier module is arranged in the second power carrier, the second power carrier is connected with one end of the relay through a remote data acquisition and transmission module, and the other end of the relay is connected with the underground micro liquid station 2. And a first power carrier module arranged on the aboveground electrical control system 13 is connected with a second power carrier module arranged on the underground electrical control system 14 through a power line. The underground micro liquid station 2 comprises an oil tank 3, a motor 5, a micro plunger pump 6, an overflow valve 7, a normally closed solenoid valve I8, a normally closed solenoid valve II 9, a check valve 10 and a single-action hydraulic cylinder 11; the single-acting hydraulic cylinder 11 is provided with an oil path inlet, and the oil tank 3 is connected with the oil path inlet arranged on the single-acting hydraulic cylinder 11 through a normally closed electromagnetic valve I8; a micro plunger pump 6 is arranged between the oil tank 3 and the normally closed electromagnetic valve I8, and the micro plunger pump 6 is connected with the motor 5; a check valve 10 is arranged between the normally closed electromagnetic valve I8 and the oil path inlet of the single-action hydraulic cylinder 11; the oil tank 3 is connected with an oil way inlet arranged on the single-action hydraulic cylinder 11 through a normally closed electromagnetic valve II 9; an overflow valve 7 is arranged between the oil tank 3 and the normally closed electromagnetic valve I8; the motor 5, the normally closed electromagnetic valve I8 and the normally closed electromagnetic valve II 9 are connected with the relay; the single-acting hydraulic cylinder 11 is connected to the safety valve 1. The single-acting hydraulic cylinder 11 is provided with an oil path inlet which is provided with a pressure sensor 12, and the pressure sensor 12 is connected with the underground remote data acquisition and transmission module. A filter 4 is arranged between the oil tank 3 and the micro plunger pump 6.
A working method of a miniature downhole fluid station system for opening a downhole safety valve comprises the following steps:
step 1: an instruction for opening the safety valve, which is made by the aboveground electrical control system, is transmitted by the aboveground computer through the programmable logic controller PLC and the power carrier machine I, and a signal is transmitted to the underground power carrier machine II through the power line and then transmitted to the motor through the remote data acquisition and transmission module and the relay;
step 2: the motor drives the miniature plunger pump to work, the highest output pressure is about 100Mpa, the normally closed electromagnetic valve is started, hydraulic oil flows into the single-action hydraulic cylinder, the piston rod is pushed to move until the valve clack of the safety valve is opened;
and step 3: when the valve clack of the safety valve is opened, the pressure sensor transmits the pressure value to the ground through the remote data acquisition and transmission module, an instruction is sent out from the ground to close the normally closed solenoid valve I, and an oil way leading to the single-acting hydraulic cylinder is subjected to pressure maintaining through the check valve, so that the valve clack is continuously in an opening state;
and 4, step 4: when the pressure sensor detects that the pressure is reduced, the motor and the miniature plunger pump work, and the normally closed electromagnetic valve is opened for pressure compensation; when the pressure is complemented to the opening pressure of the pressure sensor, the normally closed electromagnetic valve I is closed;
and 5: an instruction for closing the safety valve, which is made by an aboveground electrical control system, is transmitted by an aboveground computer through a Programmable Logic Controller (PLC) and a power line carrier machine I, a signal is transmitted to a downhole power line carrier machine II through a power line, and then transmitted to a normally closed electromagnetic valve I and a normally closed electromagnetic valve II through a remote data acquisition and transmission module and a relay, wherein the normally closed electromagnetic valve I is closed, the normally closed electromagnetic valve II is opened, an oil way is unloaded, and a valve clack of the safety valve is closed; when sudden power failure occurs, the normally closed electromagnetic valve I is closed after power failure, the normally closed electromagnetic valve II is opened under the power supply of the standby power supply, the oil way is unloaded, and the valve clack of the safety valve is closed.
The invention belongs to the field of petroleum equipment, and provides a system for opening an underground safety valve. Relates to the overall design of an underground safety valve operating system, the structural design of an underground liquid station and the design of an aboveground electrical control system. An operator on the well can control the opening and closing of the safety valve operated by the underground micro liquid station through the upper computer. The signal transmission between the underground and the aboveground is realized through a carrier module, and the electric signal realizes the switch control of an underground motor, an electromagnetic valve and a sensor through a relay. When the hydraulic oil pump works, hydraulic oil in the oil tank is pumped by the pump to be pressurized to a certain degree to push the push rod of the safety valve, the butterfly valve is opened, and the safety valve is opened. The underground liquid station adopts a structure of a semicircular column and surrounds an upper pipeline of the underground safety valve; the internal part of the oil tank adopts a layered structure to separate an oil tank, a hydraulic element, an electrical element and the like, thereby being convenient for the arrangement of the elements and pipelines.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (8)
1. A miniature liquid station system in pit for opening relief valve in pit which characterized in that: the system comprises an aboveground electrical control system, an underground electrical control system and an underground micro liquid station; the underground electric control system is connected with the underground safety valve through the underground micro liquid station.
2. A micro down-hole fluid station system for opening a down-hole safety valve as defined in claim 1, wherein: the aboveground electrical control system comprises a computer, a Programmable Logic Controller (PLC) and a power carrier machine I; a first power carrier module is arranged in the first power carrier; and the computer is connected with the first power carrier module through the Programmable Logic Controller (PLC).
3. A micro down-hole fluid station system for opening a down-hole safety valve as defined in claim 2, wherein: the underground electrical control system comprises a power line carrier machine II, a remote data acquisition and transmission module and a relay; and a second power carrier module is arranged in the second power carrier, the second power carrier is connected with one end of the relay through a remote data acquisition and transmission module, and the other end of the relay is connected with the underground micro liquid station.
4. A micro down-hole fluid station system for opening a down-hole safety valve as defined in claim 3, wherein: and a first power carrier module arranged on the aboveground electrical control system is connected with a second power carrier module arranged on the underground electrical control system through a power line.
5. A micro down-hole fluid station system for opening a down-hole safety valve as defined in claim 4, wherein: the underground micro liquid station comprises an oil tank, a motor, a micro plunger pump, an overflow valve, a normally closed first electromagnetic valve, a normally closed second electromagnetic valve, a one-way valve and a single-action hydraulic cylinder; the single-acting hydraulic cylinder is provided with an oil path inlet, and the oil tank is connected with the oil path inlet arranged on the single-acting hydraulic cylinder through a normally closed electromagnetic valve I; a micro plunger pump is arranged between the oil tank and the normally closed electromagnetic valve I and is connected with a motor; a check valve is arranged between the normally closed electromagnetic valve I and the oil way inlet of the single-action hydraulic cylinder; the oil tank is connected with an oil way inlet arranged on the single-action hydraulic cylinder through a normally closed electromagnetic valve II; an overflow valve is arranged between the oil tank and the normally closed electromagnetic valve I; the motor, the normally closed electromagnetic valve I and the normally closed electromagnetic valve II are connected with the relay; the single-acting hydraulic cylinder is connected with the safety valve.
6. A micro down-hole fluid station system for opening a down-hole safety valve as defined in claim 5, wherein: and an oil way inlet of the single-action hydraulic cylinder is provided with a pressure sensor, and the pressure sensor is connected with the underground remote data acquisition and transmission module.
7. A micro down-hole fluid station system for opening a down-hole safety valve as defined in claim 6, wherein: and a filter is arranged between the oil tank and the micro plunger pump.
8. A working method of a miniature underground liquid station system for opening an underground safety valve is characterized by comprising the following steps: the method comprises the following steps:
step 1: an instruction for opening the safety valve, which is made by the aboveground electrical control system, is transmitted by the aboveground computer through the programmable logic controller PLC and the power carrier machine I, and a signal is transmitted to the underground power carrier machine II through the power line and then transmitted to the motor through the remote data acquisition and transmission module and the relay;
step 2: the motor drives the miniature plunger pump to work, the highest output pressure is about 100Mpa, the normally closed electromagnetic valve is started, hydraulic oil flows into the single-action hydraulic cylinder, the piston rod is pushed to move until the valve clack of the safety valve is opened;
and step 3: when the valve clack of the safety valve is opened, the pressure sensor transmits the pressure value to the ground through the remote data acquisition and transmission module, an instruction is sent out from the ground to close the normally closed solenoid valve I, and an oil way leading to the single-acting hydraulic cylinder is subjected to pressure maintaining through the check valve, so that the valve clack is continuously in an opening state;
and 4, step 4: when the pressure sensor detects that the pressure is reduced, the motor and the miniature plunger pump work, and the normally closed electromagnetic valve is opened for pressure compensation; when the pressure is complemented to the opening pressure of the pressure sensor, the normally closed electromagnetic valve I is closed;
and 5: an instruction for closing the safety valve, which is made by an aboveground electrical control system, is transmitted by an aboveground computer through a Programmable Logic Controller (PLC) and a power line carrier machine I, a signal is transmitted to a downhole power line carrier machine II through a power line, and then transmitted to a normally closed electromagnetic valve I and a normally closed electromagnetic valve II through a remote data acquisition and transmission module and a relay, wherein the normally closed electromagnetic valve I is closed, the normally closed electromagnetic valve II is opened, an oil way is unloaded, and a valve clack of the safety valve is closed; when sudden power failure occurs, the normally closed electromagnetic valve I is closed after power failure, the normally closed electromagnetic valve II is opened under the power supply of the standby power supply, the oil way is unloaded, and the valve clack of the safety valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010459995.3A CN111622711A (en) | 2020-05-27 | 2020-05-27 | Miniature underground liquid station system for opening underground safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010459995.3A CN111622711A (en) | 2020-05-27 | 2020-05-27 | Miniature underground liquid station system for opening underground safety valve |
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| CN111622711A true CN111622711A (en) | 2020-09-04 |
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| CN202010459995.3A Pending CN111622711A (en) | 2020-05-27 | 2020-05-27 | Miniature underground liquid station system for opening underground safety valve |
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Cited By (2)
| 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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| CN114458241A (en) * | 2022-02-14 | 2022-05-10 | 上海工程技术大学 | Optical fiber communication high-temperature-resistant in-situ control system of underground tool micro liquid station |
| CN114458241B (en) * | 2022-02-14 | 2023-08-08 | 上海工程技术大学 | Optical fiber communication high-temperature-resistant in-situ control system of underground tool miniature liquid station |
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