A self-controlled pressure type high-efficiency multifunctional skid-mounted tank electronic control system

Abstract

The present invention discloses a self-controlled pressure type high-efficiency multifunctional skid-mounted tank electric control system, which relates to the technical field of oil drilling. The plugging pump of the present invention adopts AC variable frequency motor direct drive technology, which makes the overall structure more compact, smaller in size and lighter in weight. A 355 kW AC variable frequency direct drive motor is directly installed on the input shaft of a 450HP plugging pump to pump, squeeze and hold pressure for plugging the stirred fluid, so as to avoid the plugging slurry blocking the pump and pipeline on site; a control system is used to automatically control the operation of the plugging pump, and accurately control the flow rate and pressure of the pump. A variable frequency direct drive motor is used to directly drive the impeller in the storage tank to rotate and stir the fluid, and the speed can be adjusted by the frequency converter to drive the motor, so that the plugging slurry is stirred evenly and efficiently, which greatly improves the quality and speed of the plugging slurry, increases the transmission ratio, and is more energy-efficient. It can save the preparation time of the plugging slurry, save the operation process time, save the plugging cost, and provide an important guarantee for complex emergency treatment underground.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, and more specifically to a self-controlled pressure type high-efficiency multifunctional skid-mounted tank electric control system. Background Art

[0002] In oil drilling engineering operations, when a drilling well leakage accident occurs, a large amount of mud liquid will be lost. If it is not handled in time, well control risks will occur. The common treatment method is to use a specific mud material with a plugging slurry pump to inject it into the well to plug the leakage bottom layer, realize the normal circulation of drilling fluid, and ensure the safe operation of drilling operations.

[0003] At present, the traditional way of dealing with drilling leakage is to use the on-site mud tank to prepare the plugging slurry, and then inject it into the well through the on-site drilling mud pump to plug the leakage. It has the following disadvantages:

[0004] (1) There is no dedicated slurry preparation tank for plugging slurry, the slurry preparation efficiency is low, the quality is not high, and it occupies important equipment on site.

[0005] (2) The special materials of the plugging slurry can easily clog the pumps and pipelines on site.

[0006] (3) Plugging control: When using a drilling mud pump to plug leaks, the driller uses the hand wheel (analog quantity) to adjust the pumping volume in the control room. The driller cannot accurately control the pumping flow and pressure, which can easily lead to poor plugging effects or plugging failures, complicating underground accidents and increasing drilling costs. Summary of the invention

[0007] In order to overcome the defects in the above-mentioned prior art, the present invention discloses a self-controlled pressure-type efficient and multifunctional skid-mounted tank electric control system. The present invention is designed to combine the functional characteristics of the new skid-mounted plugging tank and the drilling plugging process control requirements, and is a set of integrated full-process visualized centralized electrical and electronic control systems suitable for drilling site-specific slurry preparation, drilling fluid mixing, plugging pump control and early warning monitoring. It can better improve the efficiency of plugging operations in the event of well leakage accidents, can respond quickly, simplify procedures, reduce downhole risks and well control risks, and safely ensure drilling production operations.

[0008] In order to achieve the above objectives, the technical solution adopted by the present invention is:

[0009] An automatic pressure-controlled high-efficiency multifunctional skid-mounted tank electric control system, comprising a control system, wherein the control system comprises a central processing unit, a slave station, an industrial computer, a switch, a wireless transmission module, a control terminal and a frequency converter;

[0010] The central processor, the slave station, and the industrial computer are respectively connected to the switch, the switch is connected to the wireless transmission module and the inverter, and the control terminal is wirelessly connected to the wireless transmission module;

[0011] The frequency converter includes a stirrer direct drive motor frequency converter and a plugging pump direct drive motor frequency converter;

[0012] The frequency converter of the agitator direct-drive motor is connected to the frequency converter direct-drive motor of the skid-mounted tank slurry storage stirring system, and controls the impeller connected to the frequency converter direct-drive motor to rotate in the storage tank to stir the configured fluid;

[0013] The plugging pump direct drive motor inverter is connected to the AC variable frequency direct drive motor of the skid-mounted tank heavy slurry circulation system to control the operation of the plugging pump connected to the AC variable frequency direct drive motor to pump, squeeze and hold pressure on the stirred fluid.

[0014] Preferably, the control system is also connected to a sand pump of a skid-mounted tank slurry distribution system to control the sand pump to operate and configure various fluids used in drilling and completion operations.

[0015] Preferably, the agitator direct-drive motor inverter includes a first agitator direct-drive motor inverter and a second agitator direct-drive motor inverter, and the first agitator direct-drive motor inverter and the second agitator direct-drive motor inverter respectively control two impellers connected to the two variable-frequency direct-drive motors to rotate in the storage tank to stir the configured fluid.

[0016] In the present invention, the central processing unit (CPU, master station) is used to interpret computer instructions and process data in computer software; the slave station (WAGO) is used to be a data station selected by the master station to receive data; the industrial computer is used to realize automatic control, data acquisition and processing, remote monitoring and management, and safety control; the switch (HUB) is used to regenerate, shape and amplify the received signal; the wireless transmission module is used to realize wireless communication between the control terminal and the switch (HUB); the control terminal is used to input and output signal feedback and control of the device process. The plugging pump direct drive motor inverter (VF1) is used to drive and control the AC variable frequency direct drive motor of the skid-mounted tank plugging pump; the first agitator direct drive motor inverter (VF2) is used to drive and control the 1# agitator direct drive motor; the second agitator direct drive motor inverter (VF3) is used to drive and control the 2# agitator direct drive motor.

[0017] Preferably, the electrical control system also includes a lighting system and a monitoring system, both of which are connected to the control system. The lighting system is installed on the skid-mounted tank to illuminate the skid-mounted tank, and the monitoring system is installed on the skid-mounted tank to monitor the operation of the skid-mounted tank.

[0018] Preferably, the fluid includes plugging slurry, unblocking fluid, gel, segment plugging fluid, and sand-lifting thick slurry.

[0019] The electric control system of the present invention is an electric control system designed for a new type of skid-type structure special plugging slurry skid-mounted tank. The right end of the skid-mounted tank is equipped with a mixing funnel (jet funnel), a sand pump, a pipeline and a mud bulk material filling device, which can realize the rapid filling and mixing of mud. A 35m³ storage tank is provided in the middle, which can store weighted mud, plugging mud, etc. A plugging pump area and a control area are provided on the left end. A 450hp multifunctional direct-drive plugging pump is provided in the plugging pump area. The pump is directly driven by a 350kw AC variable frequency motor, and can pump bridge slurry, gel, de-carding agent, high water loss plugging slurry and solidified plugging slurry (cement slurry) into the bottom of the well. The control area is equipped with a control room and a control cabinet. There is a control console in the room, which can meet the operator's control and monitoring of the entire process.

[0020] Preferably, the control system is integrated in a control room, and an explosion-proof positive-pressure air-conditioning air supply device is provided in the control room. The control room is also provided with explosion-proof lamps, an incoming line cabinet, a control cabinet, a frequency conversion cabinet, and a transformer.

[0021] In the present invention, the electrical control system is integrated in the control room, which is the control center of the skid-mounted tank, realizing remote control of the plugging pump, slurry mixing system, agitator, and lighting. It has effective shock absorption and anti-vibration measures, and adopts explosion-proof positive pressure air conditioning and air supply device. While the electrical components are cooled and cooled, positive pressure explosion-proof is realized inside the centralized control room. (Equipped with explosion-proof lamps, one incoming line cabinet, one control cabinet, one frequency conversion cabinet, and one transformer. The power supply voltage is 600V / 50Hz or 400V / 50Hz, three-phase. The plugging pump motor drive adopts 600V electricity, and the other small-power motors adopt 400V electricity.)

[0022] In the present invention, the total volume of the control system is relatively small, and all control components are integrated in a control room. The control room is installed on the side of the plugging tank body. The control system can realize accurate control and adjustment of the flow and pressure of the plugging pump, and can be applied to the power supply of various well sites. The pump speed, pressure and operation of various electrical equipment can be controlled through three methods: PLC operating console, bypass, and remote control terminal interface. It can realize self-diagnosis (alarm, emergency stop, etc.) of various operating parameters, can display the working status in the remote control interface, and can control the equipment in real time. The console can satisfy the operator's control and monitoring of the entire process. The electric control system has the functions of rapid filling of bulk materials, efficient stirring, liquid level alarm, fluid metering in the well, automatic control, stepless speed regulation of direct drive pump, etc. The electrical explosion-proof meets the requirements of the well site, and the equipment and control system have high reliability. The specific contents are as follows:

[0023] 1. The control system can realize accurate control and adjustment of the flow and pressure of the plugging pump, and can be applied to the power supply of various well sites.

[0024] Preferably, the monitoring system includes a pump stroke sensor and a pressure sensor;

[0025] The pump stroke sensor is installed on the pump stroke of the plugging pump to collect pump stroke data, and sends the collected pump stroke data to the control system. The control system obtains the flow data of the plugging pump according to the pump stroke data and the mechanical parameters of the plugging pump;

[0026] The pressure sensor is installed on the output pipeline of the high-pressure end of the plugging pump to collect pressure data, and sends the collected pressure data to the control system;

[0027] The control system controls the stepless speed regulation of the AC variable frequency direct drive motor connected to the plugging pump according to the flow data and pressure data of the plugging pump, accurately controls the operating speed of the plugging pump, and performs the required flow or pump pressure control.

[0028] In the present invention, flow rate and pressure are technical parameters required by the user, and the parameters required by the user are achieved by adjusting and controlling the operating speed of the plugging pump. (1) Flow rate data is the data calculated by comprehensively collecting the signal feedback from the pump stroke sensor and the mechanical parameters of the plugging pump. (2) Pressure is the digital value of the signal fed back by the pressure sensor connected to the output pipeline of the high-pressure end of the plugging pump.

[0029] The operator inputs the pump impulse value of the plugging pump through the human-machine interface and performs stepless speed regulation of the motor, which can accurately control the running speed of the plugging pump and achieve the flow or pump pressure required for production. The input power supply of the control system can adapt to various drilling and repair well sites with 400V or 600V, 455KW power supply, or it can be powered by a 500KW generator.

[0030] 2. The speed, pressure and operation of various electrical equipment of the pump can be controlled through three methods: PLC operation console, bypass and remote control terminal interface.

[0031] Preferably, the control system further comprises a hand wheel and various switch knobs installed in the control room for controlling the bypass operation of the skid-mounted tank;

[0032] The control system includes three control modes: console control, bypass control, and control terminal control, which control the speed, pressure of the pump and the operation of various electrical equipment:

[0033] The console control is: the console control of the industrial computer;

[0034] The bypass control is: operating the given hand wheel and various switch knobs in the electrical control room;

[0035] The control terminal controls by manipulating the touch screen interface of the control terminal for control.

[0036] In the present invention, the speed, pressure and operation of various electrical equipment of the pump can be controlled in three ways: 1. Control the touch screen interface of the programmable logic controller in the electrical control room. 2. Control the given hand wheel and various switch knobs in the electrical control room in bypass mode. 3. Control the touch screen interface of a portable handheld terminal device.

[0037] 3. It can realize self-diagnosis (alarm, emergency stop, etc.) of various operating parameters, display the working status in the remote control interface, and control the equipment in real time; the console can satisfy the operator's control and monitoring of the entire process.

[0038] Preferably, the monitoring system includes a plurality of sensors, which collect operating data of the skid-mounted tank and send the operating data to the control system. The display interface of the control system displays the collected data and issues an alarm in case of abnormality.

[0039] In the present invention, by collecting various sensor signals and accessing the program control system, the visual numerical display of the working status is realized on the operation interface, or the alarm and stop control of abnormal conditions are performed by participating in the calculation, thereby playing a protective role in the abnormal state of the plugging pump. The control device of the human-machine interface has the real-time display function of the operating status of various electrical equipment, and the operator can intuitively grasp the operating status of the electrical equipment for monitoring and control.

[0040] 4. The electronic control system has the functions of fast filling of bulk materials, efficient mixing, liquid level alarm, fluid metering into the well, automatic control, and stepless speed regulation of direct drive pump.

[0041] Preferably, the control system is also connected to a liquid level detector of the skid-mounted tank slurry storage and mixing system, and the liquid level detector collects liquid level data of the storage tank of the skid-mounted tank slurry storage and mixing system, and sends the collected liquid level data to the control system, and the control system performs a liquid level alarm based on the liquid level data.

[0042] In the present invention, the control system controls the operation of the sand pump of the skid-mounted tank slurry mixing system to achieve rapid filling of bulk materials; controls the rotation of the impeller of the skid-mounted tank slurry storage and stirring system to achieve efficient stirring; performs a liquid level alarm based on the storage tank liquid level data sent by the liquid level detector; obtains the inflowing fluid flow rate through the above-mentioned pump stroke sensor; automatically controls the operation of various pumps, various sensors, valves, etc. to achieve automatic control; and controls the stepless speed regulation of the plugging pump.

[0043] In the present invention, the electric control system collects various sensor signals for control, protection and monitoring by controlling the plugging pump motor, agitator motor, sand pump motor, electric butterfly valve and other electrical equipment, so as to realize the smooth operation of functions such as fast filling of bulk materials, efficient mixing, liquid level alarm, fluid metering, automatic control, and stepless speed regulation of direct drive pumps.

[0044] Preferably, the inlet pipe of the plugging pump is connected to the storage tank, and a first electric butterfly valve is arranged thereon, and the outlet pipe of the plugging pump is connected to the ground gate valve group or the drilling table gate valve group, and an electric gate valve is arranged thereon;

[0045] The inlet pipe of the sand pump is connected to the storage tank and is provided with a second electric butterfly valve. The inlet pipe of the sand pump is also connected to an external supplementary pipe, and a manual butterfly valve is provided on the external supplementary pipe.

[0046] The outlet pipe of the sand pump is connected to the storage tank, and a fifth electric butterfly valve and a mixing funnel of the skid-mounted tank slurry mixing system are arranged on the rear section thereof;

[0047] A fourth electric butterfly valve is provided at the front section of the outlet pipe of the sand pump, and a first pipeline connected to the inlet pipe of the plugging pump is connected in front of the fourth electric butterfly valve, and a third electric butterfly valve is provided on the first pipeline;

[0048] A second pipeline connected to the outlet pipe of the plugging pump is also connected to the front section of the outlet pipe of the sand pump and the rear of the fourth electric butterfly valve. A first ball valve and a manual gate valve are respectively provided at both ends of the second pipeline. The second pipeline is also connected to a cleaning pipeline, which is connected to the storage tank and has a second ball valve provided on it and a cleaning gun connected to the end.

[0049] Preferably, the control system is connected to the electric butterfly valve and the electric gate valve, and the control system performs the sand pump filling process, the plugging pump self-priming process, the sand pump mixing process, the plugging pump mixing process, the sand pump cleaning process, and the leak repair / injection process by controlling the opening and closing of the valves and the operation of the sand pump, the plugging pump and the agitator.

[0050] In the present invention, by switching the electric butterfly valve and the high-pressure gate valve, six major process flows are respectively provided: 1. Sand pump filling process; 2. Leakage plugging pump self-priming process; 3. Sand pump mixing process; 4. Leakage plugging pump mixing process; 5. Sand pump cleaning process; 6. Leakage plugging / squeezing process. The specific process flows are as follows:

[0051] (1) Sand pump filling process

[0052] In the present invention, the sand pump injection process is to realize that the plugging slurry in the storage tank is pumped to the plugging pump through the sand pump for high-pressure squeezing.

[0053] Preferably, the sand pump injection process includes: opening the second electric butterfly valve and the third electric butterfly valve, closing other valves, and starting the sand pump; then opening the electric gate valve, and starting the plugging pump, the spray pump and the lubrication pump. The mixed material in the storage tank stirred by the agitator is transported to the plugging pump through the sand pump for high-pressure injection; at the same time, the speed of the plugging pump motor is reduced through the frequency converter control, and the sand pump supplies liquid to the plugging pump for injection into the well.

[0054] In the present invention, the heavy slurry circulation system of the skid-mounted tank includes a plugging pump, a spray system and a lubrication system, wherein the spray system and the lubrication system are respectively provided with a spray pump and a lubrication pump.

[0055] (2) Self-priming process of leak-proof pump

[0056] In the present invention, the self-priming process of the plugging pump is that the plugging pump directly sucks the plugging slurry in the tank body with water, and the pump is injected into the well for operation.

[0057] Preferably, the self-priming process of the plugging pump includes: opening the first electric butterfly valve and the electric gate valve, closing all other valves, and simultaneously opening the plugging pump, the spray pump and the lubrication pump, and injecting the mixed material in the storage tank after being stirred by the agitator directly into the well through the plugging pump; at the same time, through the control of the frequency converter, the speed of the plugging pump motor is reduced to carry out the self-priming injection of the plugging pump into the well.

[0058] (3) Sand pump mixing process

[0059] In the present invention, the sand pump mixing process is to use a sand pump to supply liquid to a mixing funnel for slurry mixing.

[0060] Preferably, the sand pump mixing process includes: opening the second electric butterfly valve, the fourth electric butterfly valve, and the fifth electric butterfly valve, closing all other valves, and starting the sand pump at the same time, transporting the liquid in the storage tank to the mixing funnel through the sand pump, supplying liquid to the mixing funnel for slurry, and transporting the mixed material after slurry preparation to the storage tank.

[0061] In the above mixing process, the bag material is placed on the bag breaking device through the cantilever crane. After the bag is automatically broken, the bulk material is fully mixed through the sand pump and the mixing funnel. Through repeated mixing, the working fluid meets the use requirements. At the same time, the plugging pump can also supply liquid to the mixing funnel.

[0062] (4) Mixing process of plugging pump

[0063] In the present invention, the leak-blocking pump mixing process is to speed up the slurry mixing speed, and the leak-blocking pump is used to supply liquid to the mixing funnel for slurry mixing.

[0064] Preferably, the plugging pump mixing process includes: opening the first electric butterfly valve, the manual gate valve, the first ball valve, and the fifth electric butterfly valve, closing all other valves, and simultaneously opening the plugging pump, the spray pump, and the lubrication pump, and transporting the liquid in the storage tank to the mixing funnel through the plugging pump, supplying liquid to the mixing funnel for slurry preparation, and transporting the mixed material after slurry preparation to the storage tank.

[0065] (5) Sand pump cleaning process

[0066] In the present invention, the sand pump cleaning process is to pump external clean water to the plugging pump through the sand pump, so as to flush and clean the plugging slurry in the sand pump, the plugging pump and the pipeline.

[0067] Preferably, the sand pump cleaning process includes: opening the manual butterfly valve, the third electric butterfly valve, the manual gate valve, the second ball valve, and turning on the sand pump and the plugging pump, the sand pump pumps clean water to the suction port of the plugging pump, flushing and cleaning the sand pump, the plugging pump and the plugging slurry in the pipeline, and the cleaning water is then transported to the cleaning gun through the plugging pump, and the storage tank is cleaned using the cleaning gun.

[0068] (6) Leakage repair / injection process

[0069] In the present invention, the plugging / injection process is to achieve a dual measure that a plugging pump can pump the plugging slurry in the storage tank into the well for plugging operations. When the amount of plugging slurry in the storage tank is insufficient, a sand pump can be used to pour external plugging slurry into the plugging pump and pump it into the well for plugging operations.

[0070] Preferably, the leak repair / squeeze injection process includes:

[0071] When the plugging pump pumps the plugging slurry in the storage tank into the well for plugging operation: open the first electric butterfly valve and electric gate valve, close all other valves, and simultaneously open the plugging pump, spray pump and lubrication pump. The plugging pump directly sucks the plugging slurry in the storage tank and injects it into the ground gate valve group or the drilling table gate valve group under high pressure;

[0072] When the plugging slurry in the storage tank is insufficient, a sand pump is used to inject external plugging slurry into the plugging pump: open the manual butterfly valve, the third electric butterfly valve and the electric gate valve, close all other valves, and start the sand pump and the plugging pump. The sand pump pumps the external plugging slurry to the suction port of the plugging pump, and the plugging pump then injects it under high pressure to the ground gate valve group or the drilling table gate valve group.

[0073] Beneficial effects of the present invention:

[0074] The self-controlled pressure-type high-efficiency multifunctional skid-mounted tank electric control system provided by the present invention adopts AC variable frequency motor direct drive technology to make the overall structure more compact, smaller in size and lighter in weight. A 355 kW AC variable frequency direct drive motor is directly installed on the input shaft of the 450HP plugging pump to pump, squeeze and hold pressure to prevent the plugging slurry from clogging the pump and pipeline on site; the control system is used to automatically control the operation of the plugging pump and accurately control the flow and pressure of the pump.

[0075] The self-controlled pressure-type high-efficiency and multifunctional skid-mounted tank electronic control system provided by the present invention uses a variable frequency direct-drive motor to directly drive the impeller in the storage tank to rotate and stir the fluid. The speed can be adjusted by driving the motor with a frequency converter, and the plugging slurry is stirred evenly and efficiently, which greatly improves the plugging slurry mixing quality and mixing speed, increases the transmission ratio, and is more energy-efficient.

[0076] Compared with preparing plugging slurry in a circulation tank or configuring plugging slurry in a plugging slurry preparation tank, the control system of the present invention can save plugging slurry preparation time, operation process time, and plugging cost, providing important guarantee for complex emergency treatment underground.

[0077] The present invention can realize a sand pump filling process, a plugging pump self-priming process, a sand pump mixing process, a plugging pump mixing process, a sand pump cleaning process, and a leak repair / squeezing process by controlling the opening and closing of valves and the operation of a sand pump, a plugging pump and a stirrer, thereby realizing multiple functions to meet drilling needs.

[0078] The present invention can realize the functions of efficient preparation, pumping, and pressure holding of various fluids in drilling and completion operations, and can automatically measure, automatically warn, and control flow and pressure to meet the requirements of various special operations and complex processing. Efficient preparation, fast and convenient pumping of various fluids, using a 350kw AC variable frequency motor directly driven 450HP multifunctional high-pressure plugging pump, can pump bridge slurry, gel, de-carding agent, high water loss plugging slurry and solidified plugging slurry (cement slurry) into the bottom of the well, professional operators in the control room or handheld wireless devices remote control, according to the needs of the high-pressure output end of the plugging pump with the spare high-pressure union and pipeline on the vehicle to the ground or the wellhead high-pressure gate valve group, so as to achieve the purpose of efficient preparation and fast squeezing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 It is a schematic diagram of the control system of the present invention;

[0080] Figure 2 It is a schematic diagram of the electronic control system of the present invention;

[0081] Figure 3 The control screen display interface of the present invention;

[0082] Figure 4 This is a schematic diagram of the skid-mounted tank of the present invention;

[0083] Figure 5 It is a schematic diagram of the overall process of the present invention;

[0084] Figure 6 It is a connection diagram of the sand pump and the plugging pump of the present invention;

[0085] In the figure: 1. control system; 11. central processing unit; 12. slave station; 13. industrial computer; 14. switch; 15. wireless transmission module; 16. control terminal; 17. direct drive motor inverter for plugging pump; 18. direct drive motor inverter for first agitator; 19. direct drive motor inverter for second agitator; 101. first electric butterfly valve; 102. second electric butterfly valve; 103. third electric butterfly valve; 104. fourth electric butterfly valve; 105. fifth electric butterfly valve; 106. electric gate valve; 107. manual butterfly valve; 108. first ball valve; 109. manual gate valve; 110. second ball valve; 2. slurry mixing system; 21. sand pump; 3. slurry storage and mixing system; 31. storage tank; 4. heavy slurry circulation system; 41. plugging pump. DETAILED DESCRIPTION

[0086] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings to fully understand the purpose, characteristics and effects of the present invention.

[0087] Example 1

[0088] A self-controlled pressure type high-efficiency multi-functional skid-mounted tank electronic control system, such as Figure 1-5 As shown, it includes a control system 1, and the control system 1 includes a central processor 11, a slave station 12, an industrial computer 13, an industrial computer 14, a wireless transmission module 15, a control terminal 16 and a frequency converter;

[0089] The central processor 11, the slave station 12, and the industrial computer 13 are respectively connected to the industrial computer 14, the industrial computer 14 is connected to the wireless transmission module 15 and the inverter, and the control terminal 16 is wirelessly connected to the wireless transmission module 15;

[0090] The frequency converter includes a stirrer direct drive motor frequency converter and a plugging pump direct drive motor frequency converter 17;

[0091] The frequency converter of the agitator direct-drive motor is connected to the frequency converter direct-drive motor of the skid-mounted tank slurry storage stirring system, and controls the impeller connected to the frequency converter direct-drive motor to rotate in the storage tank to stir the configured fluid;

[0092] The plugging pump direct drive motor inverter 17 is connected to the AC variable frequency direct drive motor of the skid-mounted tank heavy slurry circulation system to control the plugging pump connected to the AC variable frequency direct drive motor to pump, squeeze and hold pressure to plug the stirred fluid.

[0093] The control system 1 is also connected to the sand pump of the skid-mounted tank slurry distribution system to control the sand pump to operate and configure various fluids in drilling and completion operations.

[0094] The agitator direct-drive motor inverter includes a first agitator direct-drive motor inverter 18 and a second agitator direct-drive motor inverter 19. The first agitator direct-drive motor inverter 18 and the second agitator direct-drive motor inverter 19 respectively control two impellers connected to two variable-frequency direct-drive motors to rotate in the storage tank to stir the configured fluid.

[0095] In this embodiment, Figure 2 As shown, the (HMI) industrial computer or handheld tablet interface, through the industrial computer and PLC system, I / O slave station, inverter drive system to form a high-speed Ethernet communication control system. The plugging pump and agitator speed can be controlled on the HMI operation interface. The start and stop of the butterfly valve and auxiliary equipment are controlled by the I / O slave station. The I / O slave station measures the liquid level, standpipe pressure, main pump speed, motor temperature, etc. in real time through various external sensors, and transmits them to the control screen to display various real-time data and equipment status.

[0096] In this embodiment, Figure 1 and 2 As shown, the central processing unit 11 (CPU, master station) is used to interpret computer instructions and process data in computer software; the slave station 12 (WAGO) is used to be a data station selected by the master station to receive data; the industrial computer 13 is used to realize automatic control, data acquisition and processing, remote monitoring and management, and safety control; the industrial computer 14 (HUB) is used to regenerate, shape and amplify the received signal; the wireless transmission module 15 is used to realize wireless communication between the control terminal 16 and the industrial computer 14 (HUB); the control terminal 16 is used to input and output signal feedback and control of the device process. The function of the plugging pump direct drive motor inverter 17 (VF1) is to drive and control the AC variable frequency direct drive motor of the skid-mounted tank plugging pump; the function of the first agitator direct drive motor inverter 18 (VF2) is to drive and control the 1# agitator direct drive motor; the function of the second agitator direct drive motor inverter 19 (VF3) is to drive and control the 2# agitator direct drive motor.

[0097] The electric control system also includes a lighting system and a monitoring system, both of which are connected to the control system. The lighting system is installed on the skid-mounted tank to illuminate the skid-mounted tank, and the monitoring system is installed on the skid-mounted tank to monitor the operation of the skid-mounted tank.

[0098] The fluid includes plugging slurry, unblocking fluid, gel, segment plugging fluid, and sand-lifting thick slurry.

[0099] The electric control system of the present invention is an electric control system designed for a new type of skid-type structure special skid-mounted tank for plugging slurry. Figure 4As shown, the right end of the skid-mounted tank is equipped with a mixing funnel (jet funnel), a sand pump, a pipeline and a mud bulk filling device, which can realize the rapid filling and mixing of mud. A 35m³ storage tank is set in the middle, which can store weighted mud, plugging mud, etc. The left end is equipped with a plugging pump area and a control area. The plugging pump area is equipped with a 450hp multifunctional direct-drive plugging pump, which is directly driven by a 350kw AC variable frequency motor and can pump bridge slurry, gel, de-carding agent, high water loss plugging slurry and solidified plugging slurry (cement slurry) into the bottom of the well. The control area is equipped with a control room and a control cabinet, and there is a control console in the room to meet the operator's control and monitoring of the entire process.

[0100] The control system is integrated in a control room, which is provided with an explosion-proof positive pressure air-conditioning air supply device, explosion-proof lamps, incoming line cabinets, control cabinets, frequency conversion cabinets, and transformers.

[0101] In this embodiment, the electrical control system is integrated in the control room, which is the control center of the skid-mounted tank, and realizes remote control of the plugging pump, slurry mixing system, agitator, and lighting. It has effective shock absorption and anti-vibration measures, and adopts explosion-proof positive pressure air conditioning and air supply devices. While the electrical components are cooled and cooled, positive pressure explosion-proof is realized inside the centralized control room. (Equipped with explosion-proof lamps, one incoming line cabinet, one control cabinet, one frequency conversion cabinet, and one transformer. The power supply voltage is: 600V / 50Hz or 400V / 50Hz, three-phase. The plugging pump motor drive adopts 600V electricity, and the other small-power motors adopt 400V electricity.)

[0102] In this embodiment, the total volume of the control system is relatively small, and all control components are integrated in a control room. The control room is installed on the side of the plugging tank body. The control system can realize accurate control and adjustment of the flow and pressure of the plugging pump, and can be applied to the power supply of various well sites; the pump speed, pressure and operation of various electrical equipment can be controlled through three methods: PLC operating table, bypass, and remote control terminal interface; various operating parameters can be self-diagnosed (alarm, emergency stop, etc.), the working status can be displayed in the remote control interface, and the equipment can be controlled in real time; the console can meet the operator's control and monitoring of the entire process; the electric control system has the functions of rapid filling of bulk materials, efficient mixing, liquid level alarm, fluid metering in the well, automatic control, stepless speed regulation of direct drive pump, etc.; the electrical explosion-proof meets the requirements of the well site, and the equipment and control system are highly reliable. The specific contents are as follows:

[0103] 1. The control system can realize accurate control and adjustment of the flow and pressure of the plugging pump, and can be applied to the power supply of various well sites.

[0104] The monitoring system includes a pump stroke sensor and a pressure sensor;

[0105] The pump stroke sensor is installed on the pump stroke of the plugging pump to collect pump stroke data, and sends the collected pump stroke data to the control system. The control system obtains the flow data of the plugging pump according to the pump stroke data and the mechanical parameters of the plugging pump;

[0106] The pressure sensor is installed on the output pipeline of the high-pressure end of the plugging pump to collect pressure data, and sends the collected pressure data to the control system;

[0107] The control system controls the stepless speed regulation of the AC variable frequency direct drive motor connected to the plugging pump according to the flow data and pressure data of the plugging pump, accurately controls the operating speed of the plugging pump, and performs the required flow or pump pressure control.

[0108] In this embodiment, flow rate and pressure are technical parameters required by the user, and the parameters required by the user are achieved by adjusting and controlling the operating speed of the plugging pump. (1) Flow rate data is the data calculated by combining the collected signal from the pump stroke sensor and the mechanical parameters of the plugging pump. (2) Pressure is the digital value of the signal fed back by the pressure sensor connected to the high-pressure output pipeline of the plugging pump.

[0109] The operator inputs the pump impulse value of the plugging pump through the human-machine interface and performs stepless speed regulation of the motor, which can accurately control the running speed of the plugging pump and achieve the flow or pump pressure required for production. The input power supply of the control system can adapt to various drilling and repair well sites with 400V or 600V, 455KW power supply, or it can be powered by a 500KW generator.

[0110] 2. The speed, pressure and operation of various electrical equipment of the pump can be controlled through three methods: PLC operation console, bypass and remote control terminal interface.

[0111] The control system also includes a hand wheel and various switch knobs installed in the control room to control the bypass operation of the skid-mounted tank;

[0112] The control system includes three control modes: console control, bypass control, and control terminal control, which control the speed, pressure of the pump and the operation of various electrical equipment:

[0113] The console control is: the console control of the industrial computer;

[0114] The bypass control is: operating the given hand wheel and various switch knobs in the electrical control room;

[0115] The control terminal controls by manipulating the touch screen interface of the control terminal for control.

[0116] In this embodiment, the speed, pressure and operation of various electrical equipment of the pump can be controlled in three ways: 1. Control the touch screen interface of the programmable logic controller in the electrical control room. 2. In bypass mode, control the given hand wheel and various switch knobs in the electrical control room. 3. Control the touch screen interface of a portable handheld terminal device.

[0117] 3. It can realize self-diagnosis (alarm, emergency stop, etc.) of various operating parameters, display the working status in the remote control interface, and control the equipment in real time; the console can satisfy the operator's control and monitoring of the entire process.

[0118] The monitoring system includes a plurality of sensors, which collect operating data of the skid-mounted tank and send the operating data to the control system. The display interface of the control system displays the collected data and issues an alarm in case of abnormality.

[0119] In this embodiment, by collecting various sensor signals and accessing the program control system, the visual numerical display of the working status is realized on the operation interface, or the alarm and stop control of abnormal conditions are performed by participating in the calculation, thereby playing a protective role in the abnormal state of the plugging pump. The control device of the human-machine interface has the real-time display function of the operating status of various electrical equipment, and the operator can intuitively grasp the operating status of the electrical equipment for monitoring and control.

[0120] 4. The electronic control system has the functions of fast filling of bulk materials, efficient mixing, liquid level alarm, fluid metering into the well, automatic control, and stepless speed regulation of direct drive pump.

[0121] The control system is also connected to a liquid level detector of the skid-mounted tank slurry storage and mixing system. The liquid level detector collects liquid level data of the storage tank of the skid-mounted tank slurry storage and mixing system and sends the collected liquid level data to the control system. The control system issues a liquid level alarm based on the liquid level data.

[0122] In this embodiment, the control system controls the operation of the sand pump of the skid-mounted tank slurry mixing system to achieve rapid filling of bulk materials; controls the rotation of the impeller of the skid-mounted tank slurry storage and mixing system to achieve efficient mixing; performs a liquid level alarm based on the liquid level data of the storage tank sent by the liquid level detector; obtains the flow rate of the fluid entering the well through the above-mentioned pump stroke sensor; automatically controls the operation of various pumps, various sensors, valves, etc. to achieve automatic control; and controls the stepless speed regulation of the plugging pump.

[0123] In this embodiment, the electric control system collects various sensor signals for control, protection and monitoring by controlling the plugging pump motor, agitator motor, sand pump motor, electric butterfly valve and other electrical equipment, so as to realize the smooth operation of functions such as fast filling of bulk materials, efficient mixing, liquid level alarm, fluid metering, automatic control, and stepless speed regulation of direct drive pumps.

[0124] Example 2

[0125] This embodiment is further described on the basis of embodiment 1. Figure 4 , 5 As shown in FIG. 6 , the inlet pipe of the plugging pump 41 is connected to the storage tank 31 , and a first electric butterfly valve 101 is arranged thereon; the outlet pipe of the plugging pump 41 is connected to the ground gate valve group or the drilling table gate valve group, and an electric gate valve 106 is arranged thereon;

[0126] The inlet pipe of the sand pump 21 is connected to the storage tank 31, and a second electric butterfly valve 102 is arranged on the inlet pipe of the sand pump 21. The inlet pipe of the sand pump 21 is also connected to an external supplementary pipe, and a manual butterfly valve 107 is arranged on the external supplementary pipe.

[0127] The outlet pipe of the sand pump 21 is connected to the storage tank 31, and a fifth electric butterfly valve 105 and a mixing funnel of the skid-mounted tank slurry mixing system are arranged on the rear section thereof;

[0128] A fourth electric butterfly valve 104 is provided at the front section of the outlet pipe of the sand pump 21, and a first pipeline connected to the inlet pipe of the plugging pump 41 is connected in front of the fourth electric butterfly valve 104, and a third electric butterfly valve 103 is provided on the first pipeline;

[0129] A second pipeline connected to the outlet pipe of the plugging pump 41 is also connected to the front section of the outlet pipe of the sand pump 21 and the rear of the fourth electric butterfly valve 104. A first ball valve 108 and a manual gate valve 109 are respectively provided at both ends of the second pipeline. The second pipeline is also connected to a cleaning pipeline, which is connected to the storage tank and is provided with a second ball valve 110 and a cleaning gun at the end.

[0130] The control system is connected to the electric butterfly valve and the electric gate valve. The control system performs the sand pump 21 filling process, the plugging pump 41 self-priming process, the sand pump 21 mixing process, the plugging pump 41 mixing process, the sand pump 21 cleaning process, and the leak repair / squeezing process by controlling the opening and closing of the valves and the operation of the sand pump 21, the plugging pump 41 and the agitator.

[0131] In this embodiment, by switching the electric butterfly valve and the high-pressure gate valve, six major process flows are respectively provided: 1. the filling process of the sand pump 21; 2. the self-priming process of the plugging pump 41; 3. the mixing process of the sand pump 21; 4. the mixing process of the plugging pump 41; 5. the cleaning process of the sand pump 21; 6. the leak repairing / squeezing process. The specific process flows are as follows:

[0132] (1) Sand pump 21 filling process

[0133] In this embodiment, the injection process of the sand pump 21 is to realize that the plugging slurry in the storage tank 31 is pumped to the plugging pump 41 through the sand pump 21 for high-pressure squeezing.

[0134] The injection process of the sand pump 21 includes: opening the second electric butterfly valve 102 and the third electric butterfly valve 103, closing other valves, and starting the sand pump 21; then opening the electric gate valve 106, and starting the plugging pump 41, the spray pump and the lubrication pump, and the mixed material stirred by the agitator in the storage tank 31 is transported to the plugging pump 41 through the sand pump 21 for high-pressure injection; at the same time, through the control of the frequency converter, the speed of the motor of the plugging pump 41 is reduced, and the sand pump 21 supplies liquid to the plugging pump 41 for injection into the well.

[0135] In this embodiment, the heavy slurry circulation system of the skid-mounted tank includes a plugging pump 41, a spray system and a lubrication system, wherein the spray system and the lubrication system are respectively provided with a spray pump and a lubrication pump.

[0136] (2) Leakage-blocking pump 41 self-priming process

[0137] In this embodiment, the self-priming process of the plugging pump 41 is that the plugging pump 41 directly sucks the plugging slurry in the tank body with water, and the pump is injected into the well for operation.

[0138] The self-priming process of the plugging pump 41 includes: opening the first electric butterfly valve 101 and the electric gate valve 106, closing all other valves, and simultaneously opening the plugging pump 41, the spray pump and the lubrication pump, and directly injecting the mixed material stirred by the agitator in the storage tank 31 into the well through the plugging pump 41; at the same time, through the control of the frequency converter, the motor speed of the plugging pump 41 is reduced to perform the self-priming injection of the plugging pump 41 into the well.

[0139] (3) Sand pump 21 mixing process

[0140] In this embodiment, the mixing process of the sand pump 21 is to use the sand pump 21 to supply liquid to the mixing funnel for slurry mixing.

[0141] The mixing process of the sand pump 21 includes: opening the second electric butterfly valve 102, the fourth electric butterfly valve 104, and the fifth electric butterfly valve 105, closing all other valves, and opening the sand pump 21 at the same time, transporting the liquid in the storage tank 31 to the mixing funnel through the sand pump 21, supplying liquid to the mixing funnel for slurry preparation, and transporting the mixed material after slurry preparation to the storage tank 31.

[0142] In the above mixing process, the bag material is placed on the bag breaking device by the cantilever, and the bulk material is fully mixed by the sand pump 21 and the mixing funnel after the bag is automatically broken. Through repeated mixing, the working fluid meets the use requirements. At the same time, the plugging pump 41 can also supply liquid to the mixing funnel.

[0143] (4) Mixing process of plugging pump 41

[0144] In this embodiment, the mixing process of the plugging pump 41 is to speed up the slurry mixing speed, and the plugging pump 41 is used to supply liquid to the mixing funnel for slurry mixing.

[0145] The mixing process of the plugging pump 41 includes: opening the first electric butterfly valve 101, the manual gate valve 109, the first ball valve 108, and the fifth electric butterfly valve 105, closing all other valves, and simultaneously opening the plugging pump 41, the spray pump and the lubrication pump, and transporting the liquid in the storage tank 31 to the mixing funnel through the plugging pump 41, supplying liquid to the mixing funnel for slurry preparation, and transporting the mixed material after slurry preparation to the storage tank 31.

[0146] (5) Sand pump 21 cleaning process

[0147] In this embodiment, the cleaning process of the sand pump 21 is to pump external clean water to the plugging pump 41 through the sand pump 21 to flush and clean the plugging slurry in the sand pump 21, the plugging pump 41 and the pipeline.

[0148] The cleaning process of the sand pump 21 includes: opening the manual butterfly valve 107, the third electric butterfly valve 103, the manual gate valve 109, the second ball valve 110, and turning on the sand pump 21 and the plugging pump 41. The sand pump 21 pumps clean water to the suction port of the plugging pump 41 to flush and clean the plugging slurry in the sand pump 21, the plugging pump 41 and the pipeline. The cleaning water is then transported to the cleaning gun through the plugging pump 41, and the storage tank 31 is cleaned by the cleaning gun.

[0149] (6) Leakage repair / injection process

[0150] In this embodiment, the plugging / injection process is to achieve a dual measure in which the plugging pump 41 can pump the plugging slurry in the storage tank 31 into the well for plugging operations. When the amount of plugging slurry in the storage tank 31 is insufficient, the sand pump 21 can be used to inject external supplementary plugging slurry into the plugging pump 41 and pump it into the well for plugging operations.

[0151] The leak repair / squeeze process includes:

[0152] When the plugging pump 41 pumps the plugging slurry in the storage tank 31 into the well for plugging operation: open the first electric butterfly valve 101 and the electric gate valve 106, close all other valves, and simultaneously open the plugging pump 41, the spray pump and the lubrication pump, so that the plugging slurry in the storage tank 31 is directly sucked by the plugging pump 41 and injected into the ground gate valve group or the drilling table gate valve group under high pressure;

[0153] When the plugging slurry in the storage tank 31 is insufficient, the sand pump 21 is used to inject external plugging slurry into the plugging pump 41: open the manual butterfly valve 107, the third electric butterfly valve 103 and the electric gate valve 106, close all other valves, and open the sand pump 21 and the plugging pump 41. The sand pump 21 pumps the external supplementary plugging slurry to the suction port of the plugging pump 41, and the plugging pump 41 then injects it into the ground gate valve group or the drilling table gate valve group under high pressure.

[0154] Example 3

[0155] The electrical and electronic control system of the present invention includes a centralized control room and a portable operation control terminal. The centralized control room is the control center, which realizes remote control of the plugging pump, slurry mixing system, agitator, and lighting. The size of the room is about 1.8m×1.6m×2.35m. There are control consoles and seats in the room, which can meet the needs of operators to control and monitor the entire process. It is mainly equipped with incoming line cabinets, frequency conversion cabinets, control cabinets, transformers, explosion-proof positive pressure air conditioning and air supply devices, etc. Miniature circuit breakers, contactors, power modules, industrial switches, CPU modules, indicator lights, selection switches, control display screens, connectors, etc. are installed in the cabinet. The inside and outside of the room are made of stainless steel plates, the room body is an insulation structure, and the base, side walls, and roof interlayers are filled with insulation materials. The operating table and instrument fixing panel are made of stainless steel plates, the room body floor is a patterned aluminum alloy plate, and all internal partitions are made of stainless steel plates.

[0156] The portable wired or wireless operation control terminal is equipped with a touch screen. It can remotely control various electrical equipment on the slurry mixing tank within 100 meters of the skid-mounted tank through this portable device, and display pump pressure, speed, liquid level, fault, alarm and other functions.

[0157] The lighting system includes 4 lamps, distribution boxes, cables, connectors, etc. Among them, 2 movable lamp stand type lamps are arranged on the tank surface, and 2 fixed hanging lamps are arranged in the mixing area and pump group area respectively. Explosion-proof circuits are installed at both ends of the tank. All area lighting and power supply are unified.

[0158] The grounding system includes one set of tank and equipment grounding system.

[0159] The operator can control the plugging pump, agitator, centrifugal pump, electric butterfly valve and other equipment through the centralized control room or portable operation, and the touch screen of the control terminal human-machine interface can display the liquid level, volume, cumulative pump stroke, standpipe pressure, and displacement related parameters in real time. Through the PLC system and variable frequency drive system, the plugging pump and agitator motor speed can be controlled on the HMI. The remote switch control of the gate valve and butterfly valve can be remotely controlled through the HMI.

[0160] The input power of the whole set of electrical control system is 400VAC or 600VAC, equipped with a 600V / 400V transformer of sufficient capacity, which can quickly switch the input power of AC600V or AC400V to power the frequency conversion system and MCC system equipment in the room, meeting the actual on-site power supply environment of different well teams. The switch configuration of the electrical control system can be equipped with matching contactors and circuit breakers according to the actual on-site load.

[0161] The electric control system uses Siemens' high-performance S7-1500 PLC as the control core. The control system adopts a single PLC + bypass control solution for the electrical control logic of the inverter and the intelligent console. Through fieldbus control technology, digital equipment is combined into a Profinet network system to achieve high-speed communication between control systems such as inverters and plugging pump consoles. The automation level (PLC), digital transmission level and centralized console form a network system through Profinet, with bidirectional parameter transmission, reliable operation and easy operation. The control system collects sensor signals such as pump stroke, pump pressure, lubricating oil pressure, and liquid level, and displays them on the display screen on the console, and realizes the corresponding alarm protection function.

[0162] The inverter of the electric control system adopts a "one-to-one" control method. The external power grid provides a 600VAC / 50Hz / 1250A AC power supply to the room. A 450HP drilling pump is driven by a frequency conversion integrated machine to achieve stepless speed regulation and meet the transmission requirements of the drilling pump. Two frequency conversion units are equipped to drive two permanent magnet frequency conversion agitators, and the drag performance meets the control requirements. The frequency conversion speed regulation function is realized, and the requirements of emergency operation are met at the same time.

[0163] The electric control system has multiple protection functions to ensure safety during drilling. (1) During operation, if the winding temperature or bearing temperature is abnormal, the main motor stops immediately; (2) When the plugging pump inverter fails, the main motor stops; (3) When the actual pump pressure is greater than the set pump pressure upper limit stop value, the plugging pump runs at reduced pump stroke.

[0164] The above is a specific description of the implementation mode of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A self-controlled pressure type high-efficiency multifunctional skid-mounted tank electronic control system, It is characterized in that It includes a control system, which includes a central processing unit, a slave station, an industrial computer, a switch, a wireless transmission module, a control terminal and a frequency converter; The central processor, the slave station, and the industrial computer are respectively connected to the switch, the switch is connected to the wireless transmission module and the inverter, and the control terminal is wirelessly connected to the wireless transmission module; The frequency converter includes a stirrer direct drive motor frequency converter and a plugging pump direct drive motor frequency converter; The frequency converter of the agitator direct-drive motor is connected to the frequency converter direct-drive motor of the skid-mounted tank slurry storage and stirring system, and controls the impeller connected to the frequency converter direct-drive motor to rotate in the storage tank to stir the prepared fluid; The plugging pump direct drive motor frequency converter is connected to the AC frequency conversion direct drive motor of the skid-mounted tank heavy slurry circulation system to control the plugging pump connected to the AC frequency conversion direct drive motor to operate, and perform pumping, squeezing and pressure holding for plugging on the stirred fluid; The control system is also connected to the sand pump of the skid-mounted tank slurry mixing system to control the sand pump to operate and mix various fluids in drilling and completion operations; The inlet pipe of the plugging pump is connected to the storage tank, and a first electric butterfly valve is arranged on it; the outlet pipe of the plugging pump is connected to the ground gate valve group or the drilling table gate valve group, and an electric gate valve is arranged on it; The inlet pipe of the sand pump is connected to the storage tank and is provided with a second electric butterfly valve. The inlet pipe of the sand pump is also connected to an external supplementary pipe, and a manual butterfly valve is provided on the external supplementary pipe. The outlet pipe of the sand pump is connected to the storage tank, and a fifth electric butterfly valve and a mixing funnel of the skid-mounted tank slurry mixing system are arranged on the rear section thereof; A fourth electric butterfly valve is provided at the front section of the outlet pipe of the sand pump, and a first pipeline connected to the inlet pipe of the plugging pump is connected in front of the fourth electric butterfly valve, and a third electric butterfly valve is provided on the first pipeline; A second pipeline connected to the outlet pipe of the plugging pump is also connected to the front section of the outlet pipe of the sand pump and the rear of the fourth electric butterfly valve. A first ball valve and a manual gate valve are respectively provided at both ends of the second pipeline. The second pipeline is also connected to a cleaning pipeline, which is connected to the storage tank and has a second ball valve provided on it and a cleaning gun connected to the end.

2. The skid-mounted tank electronic control system according to claim 1, It is characterized in that The agitator direct-drive motor inverter includes a first agitator direct-drive motor inverter and a second agitator direct-drive motor inverter. The first agitator direct-drive motor inverter and the second agitator direct-drive motor inverter respectively control two impellers connected to two variable-frequency direct-drive motors to rotate in the storage tank to stir the prepared fluid.

3. The skid-mounted tank electronic control system according to claim 1, It is characterized in that The electric control system also includes a lighting system and a monitoring system, both of which are connected to the control system. The lighting system is installed on the skid-mounted tank to illuminate the skid-mounted tank, and the monitoring system is installed on the skid-mounted tank to monitor the operation of the skid-mounted tank.

4. The skid-mounted tank electronic control system according to claim 3, It is characterized in that The monitoring system includes a pump stroke sensor and a pressure sensor; The pump stroke sensor is installed on the pump stroke of the plugging pump to collect pump stroke data, and sends the collected pump stroke data to the control system. The control system obtains the flow data of the plugging pump according to the pump stroke data and the mechanical parameters of the plugging pump; The pressure sensor is installed on the output pipeline of the high-pressure end of the plugging pump to collect pressure data, and sends the collected pressure data to the control system; The control system controls the stepless speed regulation of the AC variable frequency direct drive motor connected to the plugging pump according to the flow data and pressure data of the plugging pump, accurately controls the operating speed of the plugging pump, and performs flow or pump pressure control required for production.

5. The skid-mounted tank electronic control system according to claim 1, It is characterized in that The control system also includes a hand wheel and various switch knobs installed in the control room to control the bypass operation of the skid-mounted tank; The control system includes three control modes: console control, bypass control, and control terminal control, which control the speed, pressure of the pump and the operation of various electrical equipment: The console control is: the console control of the industrial computer; The bypass control is: operating the given hand wheel and various switch knobs in the electrical control room; The control terminal controls by manipulating the touch screen interface of the control terminal for control.

6. The skid-mounted tank electronic control system according to claim 3, It is characterized in that The monitoring system includes a number of sensors, which collect the operating data of the skid-mounted tank and send the operating data to the control system. The display interface of the control system displays the collected data and alarms when abnormalities occur. The control system is also connected to a liquid level detector of the skid-mounted tank slurry storage and mixing system. The liquid level detector collects liquid level data of the storage tank of the skid-mounted tank slurry storage and mixing system and sends the collected liquid level data to the control system. The control system issues a liquid level alarm based on the liquid level data.

7. The skid-mounted tank electronic control system according to claim 1, It is characterized in that The control system is connected to the electric butterfly valve and the electric gate valve. The control system performs the sand pump filling process, the plugging pump self-priming process, the sand pump mixing process, the plugging pump mixing process, the sand pump cleaning process, and the leak repair / injection process by controlling the opening and closing of the valves and the operation of the sand pump, the plugging pump and the agitator.

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