Full-intelligent oil production control system based on all-metal conical screw pump

Abstract

An embodiment of the present invention discloses a fully intelligent oil production control system based on a fully metal conical screw pump. The system includes a central control system, a torque sensor system, a lifting sensor system, a weighing sensor system, and a pressure measuring sensor system. The present invention can collect and store various well condition data, debugging data, production data, warning data, correction data, control data, and all other data in real time, and store them in a remote data terminal; realizes real-time warning and precise compensation for the wear of the rotor of the fully metal conical screw pump. After compensation, the pump efficiency is as good as new, greatly extending the service life of the screw pump; realizes the automatic prevention and elimination of sand jamming and sand burial; sets corresponding dynamic liquid level heights and production intervals according to the corresponding relationship between the underground liquid level and the liquid supply capacity changing with the tide, and realizes the maximization of oil production. The present invention realizes the intelligentization of oil production equipment, reduces the overall cost of oil production, improves the oil production efficiency, is safe and reliable, and is suitable for popularization and application.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of intelligent oil exploitation, and in particular to an all-intelligent oil production control system based on a full-metal conical screw pump. Background Art

[0002] An oil and gas field refers to the sum of oil reservoirs, gas reservoirs, and oil and gas reservoirs within the same area controlled by a single local tectonic unit. If there is only an oil reservoir within this local tectonic range, it is called an oil field; in order to exploit and collect these petroleum resources, oil exploitation equipment is needed to drill and pump during crude oil extraction. In the field of oil exploitation, there are generally two types of oil exploitation equipment, one is a pumping unit, and the other is a screw pump. However, whether it is a pumping unit or a screw pump, there are generally problems such as the inability to intelligently eliminate sand jamming and sand burial, the inability to automatically achieve rotor wear compensation, low oil production efficiency, the inability to intelligently monitor relevant data during the oil production process, short service life, high oil production cost, poor safety and stability, and many oil production links still rely on manual experience to handle, with low intelligence, etc., and cannot meet the needs of the intelligent development of oil exploitation equipment.

[0003] The above problems need to be solved urgently. Summary of the Invention

[0004] To solve the related technical problems, the present invention provides an all-intelligent oil production control system based on a full-metal conical screw pump to solve the problems mentioned in the above background art section.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] In a first aspect, the embodiments of the present invention provide an all-intelligent oil production control system based on a full-metal conical screw pump, including: a central control system, a torque sensor system, a lifting sensor system, a weighing sensor system, and a pressure measuring sensor system; the central control system is connected to the torque sensor system, the lifting sensor system, the weighing sensor system, and the pressure measuring sensor system; the torque sensor system is connected to the drive motor, and in real time obtains the torque data of the rotor of the full-metal conical screw pump and outputs it to the central control system for processing; the lifting sensor system is connected to the lifting motor and is used to execute corresponding lifting actions according to the control instructions output by the central control system to adjust the lifting of the rotor of the full-metal conical screw pump; the weighing sensor system is used on the one hand to output the weighing data to the central control system to calculate and display the dynamic liquid level height in real time; on the other hand, it is used to output the weighing data to the central control system, and the central control system determines the disengagement point and contact point of the position controller according to the weighing data: the pressure measuring sensor system is used to perform a closed-pressure test on the pump efficiency under the control of the central control system and send the collected data including but not limited to pressure, temperature, and timing data to the central control system for processing.

[0007] As an alternative embodiment, the fully intelligent oil production control system based on the all-metal conical screw pump further includes a power control system; the power control system is used to issue functional command power transmission, power cut-off, and ultimate safety instructions to each power-consuming system according to the received real-time data.

[0008] As an alternative embodiment, the fully intelligent oil production control system based on the all-metal conical screw pump further includes an ultimate safety system; the ultimate safety system includes a torque runaway safety system; the torque runaway safety system is connected to the central control system and is used to prevent the high-speed reverse rotation of the motor by using a resistor when the torque overload gets out of control, and control the reverse rotation at a safe speed, so that the torque unloading is carried out slowly and the high torque transmitted from the well bottom forms a reaction force, and the sucker rod will not be disengaged until the torque returns to zero.

[0009] As an alternative embodiment, the ultimate safety system further includes a vibration safety system; the vibration safety system is used to collect the vibration, jitter, and shaking data of the surface equipment in real time, and issue a warning or control the shutdown when an abnormality is determined.

[0010] As an alternative embodiment, the torque runaway safety system is installed on the reverse side of the control cabinet of the central control system and is composed of n resistors.

[0011] As an alternative embodiment, the weighing sensor system is specifically used to collect the dynamic net weight and static net weight. The central control system calculates the net weight of liquid lift according to the dynamic net weight and static net weight, and calculates the liquid level height according to the net weight of liquid lift and the net weight of liquid per meter.

[0012] As an alternative embodiment, the torque sensor system includes, but is not limited to, a drive motor, a power line, a frequency conversion sensor, a processor, and a resistor; the lifting sensor system includes, but is not limited to, a lift, a lifting motor, a sensor, a wire, a signal wire, a frequency converter, and a processor. The sensor is arranged at the tail of the lifting motor and calculates and feeds back the position of the lift in real time according to the speed ratio of the lift and the lifting motor.

[0013] As an alternative embodiment, the pressure measurement sensor system is composed of, but is not limited to, an automatic pressure closing valve, a pressure sensor, a wire, a signal wire, and a processor installed at the wellhead. The speed and limit of the pressure rise within the specified time of each pressure closing are used as the basis for judging whether the pump efficiency is qualified, whether the stator and rotor are worn, and whether compensation needs to be adjusted.

[0014] As an alternative implementation, the central control system is preset with a full-intelligent control mode, a manual control mode, and a remote control mode, and switches between the full-intelligent control mode, the manual control mode, and the remote control mode according to the switching instructions input by the user; the central control system is also used to synchronously record and transmit all kinds of well condition data, debugging data, production data, early warning data, correction data, control data, and all other data collected by the system, and store them in the remote data terminal.

[0015] As an alternative implementation, the central control system is also used to set corresponding dynamic liquid level heights and production intervals according to the corresponding relationship between the underground liquid level and the liquid supply capacity changing with the tide, so as to maximize the oil production.

[0016] The advantages of the full-intelligent oil production control system based on the all-metal conical screw pump provided by the embodiments of the present invention are as follows: First, it can collect and store all kinds of well condition data, debugging data, production data, early warning data, correction data, control data, and all other data in real time, and store them in the remote data terminal; Second, it realizes the real-time early warning and precise compensation of the rotor wear of the all-metal conical screw pump. After compensation, the pump efficiency is as good as new, and the service life of the screw pump is greatly extended; Third, it realizes the automatic prevention and elimination of sand jamming and sand burial, and effectively and comprehensively solves the problem of sand jamming and sand burial of the screw pump; Fourth, according to the corresponding relationship between the underground liquid level and the liquid supply capacity changing with the tide, set the corresponding dynamic liquid level height and production interval to maximize the oil production. The full-intelligent oil production control system based on the all-metal conical screw pump provided by the embodiments of the present invention truly realizes the intellectualization of oil production equipment, reduces the overall cost of oil production, improves the oil production efficiency, saves manpower and labor, is safe and reliable, and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the background technology and embodiment descriptions of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0018] Figure 1 It is the structural block diagram of the full-intelligent oil production control system based on the all-metal conical screw pump provided by Embodiment 1 of the present invention;

[0019] Figure 2 It is the structural block diagram of the full-intelligent oil production control system based on the all-metal conical screw pump provided by Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Embodiment 1

[0022] As Figure 1 shown Figure 1 is the structural block diagram of the fully intelligent oil production control system based on the all-metal conical screw pump provided by Embodiment 1 of the present invention.

[0023] In this embodiment, the fully intelligent oil production control system 100 based on the all-metal conical screw pump includes: a central control system 101, a torque sensor system 102, a lifting sensor system 103, a weighing sensor system 104, and a pressure measuring sensor system 105; the central control system 101 is connected to the torque sensor system 102, the lifting sensor system 103, the weighing sensor system 104, and the pressure measuring sensor system 105; the torque sensor system 102 is connected to the drive motor to obtain the torque data of the rotor of the all-metal conical screw pump in real time and output it to the central control system 101 for processing; the lifting sensor system 103 is connected to the lifting motor and is used to perform corresponding lifting actions according to the control instructions output by the central control system 101 to adjust the lifting of the rotor of the all-metal conical screw pump; the weighing sensor system 104 is used to output the weighing data to the central control system 101 to calculate and display the dynamic liquid level height in real time; on the other hand, it is used to output the weighing data to the central control system 101, and the central control system 101 determines the disengagement point and contact point of the position controller according to the weighing data: the pressure measuring sensor system 105 is used to perform a closed-pressure test on the pump efficiency under the control of the central control system 101 and send the collected data including but not limited to pressure, temperature, and timing data to the central control system 101 for processing.

[0024] The fully intelligent oil production control system 100 based on a fully metal conical screw pump provided by an embodiment of the present invention can collect and store various well condition data, debugging data, production data, warning data, correction data, control data, and all other data in real time, and store them in a remote data terminal. The fully intelligent oil production control system 100 based on a fully metal conical screw pump provided by an embodiment of the present invention can, through the cooperation of a central control system 101, a torque sensor system 102, a lifting sensor system 103, a position controller, etc., realize real-time warning and precise compensation for the wear of the rotor of the fully metal conical screw pump. After compensation, the pump efficiency is as good as new, and the service life of the screw pump is greatly extended; it realizes the automatic prevention and elimination of sand jamming and sand burial, and effectively and comprehensively solves the problem of sand jamming and sand burial of the screw pump.

[0025] Embodiment 2

[0026] As Figure 2 shown Figure 2 is a structural block diagram of the fully intelligent oil production control system based on a fully metal conical screw pump provided by Embodiment 2 of the present invention.

[0027] The fully intelligent oil production control system 200 based on a fully metal conical screw pump in this embodiment includes: a central control system 201, a torque sensor system 202, a lifting sensor system 203, a weighing sensor system 204, a pressure measuring sensor system 205, a power control system 206, and an ultimate safety system 207. In this embodiment, the torque sensor system 202, the lifting sensor system 203, the weighing sensor system 204, the pressure measuring sensor system 205, the power control system 206, and the ultimate safety system 207 are connected to the central control system 201.

[0028] Exemplarily, in this embodiment, the torque sensor system 202 is connected to a driving motor to obtain the torque data of the rotor of the fully metal conical screw pump in real time and output it to the central control system 201 for processing.

[0029] Specifically, the torque sensor system 202 is a sensor system connected between the drive motor (main motor) and the central control unit. In a specific application, the torque sensor system 202 includes, but is not limited to, a drive motor, power lines, a frequency conversion sensor, a processor, and a resistor. Among them, except for the drive motor and the wires, all are integrated into the control cabinet of the central control system 201. In this embodiment, the torque sensor system 202 does not share with other systems except for the ultimate safety system 207. The drive motor is located at the top of the ground equipment, and when it rotates and starts, it drives the transmission bearing box to output torque. When it is stationary, first, input the torque range, upper and lower warning values, limit unloading values, etc. required for normal production according to the well depth on the torque interface of the touch screen of the central control system 201. The central control system 201 issues instructions to each operating unit of the equipment based on the real-time data transmitted back by the drive motor and the frequency conversion sensor, the data preset by the program, etc. At the same time, the real-time data of the system is displayed in real-time on the centralized data interface of the central screen of the central control system 201.

[0030] Exemplarily, in this embodiment, the lifting sensor system 203 is connected to the lifting motor and is used to perform corresponding lifting actions according to the control instructions output by the central control system 201 to adjust the lifting of the rotor of the all-metal conical screw pump.

[0031] Specifically, the lifting sensor system 203 is a sensor system connected between the lifting motor and the central control system 201. In this embodiment, the lifting sensor system 203 includes, but is not limited to, a lifting motor, sensors, wires, signal lines, frequency converters, and processors. Among them, the elevator includes, but is not limited to, a transmission, a turbine box, and a lifting lead screw. The sensor is arranged at the tail of the lifting motor and real-time feedbacks the position of the elevator according to the speed ratio of the elevator and the lifting motor. Specifically, the lifting sensor system 203 is located at the center of the ground equipment. When the main motor drives the transmission bearing box to rotate the sucker rod and the pump to operate, the lifting sensor system 203 drives them to lift as a whole under the instruction of the central control system 201, playing the functions of controlling the stator-rotor clearance, pump efficiency, sand discharge, unloading torque, etc. of the all-metal conical screw pump.

[0032] It should be noted that during the commissioning before starting the newly installed pump, first enter a reasonable given position number at the given position on the manual interface of the control cabinet screen of the central control system 201, then click the position confirmation. After the elevator runs in place, click to set the zero position at this position. For subsequent elevator lifting and lowering, the positive and negative values are determined based on this zero position. Among them, in specific applications, the given position number is generally based on the heaviest position displayed by the weighing sensor system 204 minus 200 - 500 kg, but it is necessary to ensure a clearance margin of 10 - 20 mm at the lower opening of the bearing box to prevent the bearing box from hitting when the elevator descends to the zero position. In addition, the position controller is also adjusted up and down with this zero position as the lower fixed point. In this embodiment, under normal circumstances, the lifting sensor system 203 only receives the instructions of the central control system 201, makes lifting and lowering movements according to the instructions, and reports its own position to the central control system 201 (using the above zero position as the positioning, data can be directly obtained through the sensor), and at the same time, it is displayed in real time on the centralized data interface of the central screen of the central control system 201.

[0033] Exemplarily, in this embodiment, the weighing sensor system 204 is used on the one hand to output weighing data to the central control system 201 to calculate and display the dynamic liquid level height in real time; on the other hand, it is used to output weighing data to the central control system 201, and the central control system 201 determines the disengagement point and contact point of the position controller according to the weighing data.

[0034] Specifically, the weighing sensor system 204 includes, but is not limited to, a scale, signal lines, load cells, a processor, etc. The load cells are responsible for collecting real-time loads and providing feedback. The scale is positioned below the elevator. Generally, it must work together with the elevator and the limiters of the position controller to be effective. During the pre-production commissioning after the equipment is installed in the well, it is first necessary to determine the disengagement point and contact point of the position controller based on the weighing data, and use this as a reference to provide data support and mechanical travel margin for the precise adjustment of the position controller. When the elevator is statically commissioned, if the downhole position controller disengages during lifting, then at this time the elevator will support the static weights of the entire drive bearing box, sucker rod, rotor, and other production systems. At the same time, this weight will naturally press on the weighing sensor system 204, and the data will be displayed in real time on the central screen. Specifically, if the elevator continues to rise at this time but the weighing display shows no change or fluctuation, it can be confirmed that the position controller has disengaged, and the weight at this time is also the heaviest when static. When it is confirmed that the position controller has disengaged, slowly lower the elevator and determine the approximate positions of the elevator when the weighing display is the heaviest and when it becomes lighter. If the position of the elevator does not change after repeating this three times for the weight change, the basic positions of the limiter disengagement and contact can be confirmed. At this time, in actual application, the elevator should be lowered to a position about 200 - 500 kilograms lower to compact the spring void of the limiter and reach the formal production position. It should be noted that this is related to the high-speed steel of the contact part during limiting. If the spring is not compacted, the contact part will experience virtual contact wear. If it is compacted, the load-bearing bearing of the limiter itself will rotate, the contact part will experience less wear, and the service life of the position controller will be increased. The weight display of the weighing sensor system 204 is opposite to the load-bearing of the limiter system. Whenever the weighing value increases, the load-bearing of the downhole limiter will necessarily decrease. If the weighing value decreases, the situation of the limiter is just the opposite, and the theoretical values should be consistent whether static or dynamic.

[0035] In this embodiment, the weighing sensor system 204 is specifically used to collect the dynamic net weight and the static net weight. The central control system 201 calculates the liquid lifting net weight according to the dynamic net weight and the static net weight, and calculates the moving liquid level height according to the liquid lifting net weight and the net weight per meter of the liquid. Specifically, in this embodiment, the central control system 201 cooperates with the weighing sensor system 204 to calculate and display the moving liquid level height (the height from the ground to the liquid level) and the submergence degree (the depth of the equipment below the liquid level) in real time, with a general error <5%. Specifically as follows: (1) According to the heaviest display (static) of the weighing sensor system 204 during equipment debugging, confirm the equipment net weight of the transmission gearbox + elevator (complete set) + sucker rod + rotor (the weight includes the buoyancy of the submergence degree liquid). Among them, the above-mentioned equipment are all the equipment borne by the weighing sensor system 204. (2) According to the heaviest display (dynamic, including full pipe liquid) of the weighing sensor system 204 during equipment production, confirm the dynamic net weight during equipment production (including the buoyancy of the submergence degree liquid of the equipment). (3) Dynamic net weight - static net weight = liquid lifting net weight (the buoyancy of the submergence degree of dynamic and static cancels each other out). (4) Liquid lifting net weight ÷ net weight per meter of liquid = moving liquid level height. (Here, the liquid is based on water as a comprehensive standard). Among them, the formula for calculating the mass per meter of the sucker rod is as follows: W = πr 2 ×7850 = weight per meter of the sucker rod; the formula for calculating the mass per meter of the liquid (water) in the tubing is as follows: W = (tubing πr 2 ×h - sucker rod πr 2 ×h) × 1000 kg / m3 = weight per meter of the liquid in the pipe. (5) The pump hanging depth minus the moving liquid level height is equal to the submergence degree. In this embodiment, the central control system 201 can, on the one hand, set a warning for the submergence degree of the pump body according to the change of the real-time moving liquid level height and the preset production interval to prevent the pump body from dry running due to insufficient liquid supply and technical shutdown. On the other hand, it can set a relatively safe, efficient, and energy-saving moving liquid level height, and set an optimal production interval according to the liquid supply volume, so that both the moving liquid level height and the production can maintain a stable interval for a long time, and specifically, it needs to be input on-site according to the basic data of each oil well.

[0036] Exemplarily, in this embodiment, the pressure sensor system 205 is used to perform a closed-pressure test on the pump efficiency under the control of the central control system 201, and send the collected data including but not limited to pressure, temperature, and timing data to the central control system 201 for processing.

[0037] Specifically, in this embodiment, the pressure measurement sensor system 205 is composed of an automatic pressure closing valve installed at the wellhead, a pressure sensor, electric wires, signal wires, a processor, etc. During operation, first, on the pressure measurement sensor interface on the central screen of the central control system 201, input the speed and limit value of the pressure rise within the specified time for each pressure closing as an important basis for determining whether the pump efficiency is qualified, whether the stator and rotor are worn, and whether compensation needs to be adjusted. For example, for the wellhead pressure during normal pressure closing, at a standard speed of 100 revolutions per minute, reaching 5 MPa within 5 minutes can meet the production requirements. Once it reaches 5 MPa, the pressure closing should be stopped to prevent safety accidents caused by the pipeline being unable to withstand the pressure. If the data does not meet the standard, the pump efficiency needs to be adjusted. The central control system 201, as needed, instructs the pressure closing valve to close for testing the pump efficiency, and the pressure sensor transmits real-time pressure, temperature, timing, and other data, as well as data during daily production, to the central control system 201. The central control system 201 uses the obtained data as an important basis for issuing instructions to other units.

[0038] Exemplarily, in this embodiment, the fully intelligent oil production control system 200 based on the all-metal conical screw pump further includes a metering and detection system 208. The metering and detection system 208 is composed of a metering detector installed at the wellhead, electric wires, signal wires, a frequency converter, a processor, etc. It can perform real-time and specific analysis and detection on the flowing liquid medium in terms of flow rate, water content, viscosity, etc., and synchronously transmit the detection data to the central control system 201 as an important basis for the system's comprehensive judgment and issuing instructions. It should be noted that some data collected by the metering and detection system 208, such as the oil-water ratio data and the liquid output, can also be obtained through manual recording, observation, and calculation, and are not limited to using the metering and detection system 208.

[0039] Exemplarily, in this embodiment, the fully intelligent oil production control system 200 based on the all-metal conical screw pump further includes a power control system 206; the power control system 206 is used to issue functional command-based power transmission, distribution, power cut-off, and ultimate safety instructions to each power consumption system according to the received real-time data. Specifically, in this embodiment, the power control system 206 is responsible for the centralized processing of functions such as power transmission, distribution, switching, transformation, and frequency conversion of the entire oil production equipment, and is a control system that meets the installation and all-weather use requirements in oil fields or other mining environments. In this embodiment, the power control system 206 includes, but is not limited to, electric wires, a main power valve, a power manager, main and auxiliary frequency converters, a circuit breaker, an IPC controller, a protector, a contactor, a multi-functional electricity meter, a processor, etc.

[0040] Exemplarily, in this embodiment, the fully intelligent oil production control system 200 based on the all-metal conical screw pump further includes an ultimate safety system 207; the ultimate safety system 207 includes a torque runaway safety system 2071; the torque runaway safety system 2071 is connected to the central control system 201 and is used to prevent the motor from rotating at high speed in reverse by using resistance when the torque overload runs out of control, and control the reverse rotation at a safe speed, so that it slowly unloads the torque and forms a reaction force with the high torque transmitted from the wellbore, and the sucker rod will not be disengaged until the torque returns to zero. Exemplarily, in this implementation, the torque runaway safety system 2071 is installed on the reverse side of the control cabinet of the central control system 201 and is composed of n resistors, with sensitive response. In specific applications, in extreme cases, if the torque instantaneously overloads and runs out of control and the central control system 201 has no time to process it and the drive motor has automatically shut down due to overload, it will cause the motor to rotate at high speed in reverse instantaneously, resulting in the disengagement of the sucker rod or even the flying of the bearing box. At this time, the central control system 201 will activate the torque runaway safety system 2071, and the resistor uses its resistance ability to prevent the motor from rotating at high speed in reverse and can control the reverse rotation at a safe speed, such as 60 revolutions per minute, so that it can slowly unload the torque and form a reaction force with the high torque transmitted from the wellbore, making the sucker rod only tighten more and not be disengaged or even run away until the torque returns to zero.

[0041] Exemplarily, in this embodiment, the ultimate safety system 207 further includes a vibration safety system 2072; the vibration safety system 2072 is used to collect vibration, jitter and shaking data of the surface equipment in real time and issue a warning or control the shutdown when an abnormality is determined. Specifically, in this embodiment, the vibration safety system 2072 is composed of vibration sensors, signal lines, etc. installed on the derrick. The vibration safety system 2072 is developed to prevent accidental situations such as vibration, jitter and shaking caused by the loosening of the screws of the surface equipment. Once vibration above medium frequency is detected, a warning will be issued. If the vibration duration exceeds the set value, the central control system 201 will control an automatic shutdown.

[0042] Exemplarily, in this embodiment, the central control system 201 presets a fully intelligent control mode, a manual control mode and a remote control mode, and realizes the switching between the fully intelligent control mode, the manual control mode and the remote control mode according to the switching instruction input by the user; the central control system 201 is also used to synchronously record and transmit all kinds of well condition data, debugging data, production data, warning data, correction data, control data and all other data collected by the system, and store them in the remote data terminal.

[0043] Specifically, in this embodiment, the core control part of the central control system 201 is integrated into an independent control cabinet, the full name of which is the central control cabinet. The control cabinet is equipped with local electrical, electronic signal and control connection elements according to international standards. The specific elements are as follows: (1) an all-weather insulated and heat-insulated semi-enclosed control cabinet, which needs to be fixedly installed on site; (2) the above-mentioned power control system 206; (3) indicator lights, start and emergency stop buttons, resistor brake components, sockets, etc.; (4) grounding connection strips, various connection wires with fixed numbers, and connection terminals with corresponding numbers for all connection wires, etc.; (5) central processing unit, human-computer interaction interface (touch screen), remote information transmission, algorithms, etc.; (6) connection terminals and numbered lines for various sensors and equipment.

[0044] Specifically, in this embodiment, the fully intelligent control mode of the central control system 201 includes: after the equipment is installed in the well, it needs to be manually debugged first, and various data limits are input according to the set conditions in each interface of the touch screen of the control cabinet. After the equipment is debugged and officially starts production, except for daily maintenance and monitoring, no manual intervention is required in the whole process. The fully intelligent program can automatically identify the warnings of various working conditions in time according to the various data fed back by the above sensors during work, and automatically process and remove various warnings, such as: pump efficiency warning, liquid output warning, liquid level warning, sand content warning, torque warning, extreme safety processing, etc., and simultaneously display various sensor working condition data on the central screen. In the event of extreme conditions that lead to shutdown or expiration of life, manual intervention is required.

[0045] Specifically, in this embodiment, the manual control mode of the central control system 201 includes: manual control is the operator performing manual operation on site according to the actual situation. After normal production, except for the closing pressure link, manual control requires manual operation of mechanical equipment. Other links are manually input digital adjustments on the touch screen according to actual needs. Therefore, the on-site operator must undergo formal operation training, be familiar with the operation program logic, and have certain practical experience.

[0046] Specifically, in this embodiment, the remote control mode of the central control system 201 includes: this mode is a control method established on a remote operation platform, which can be remotely operated on a mobile phone or computer. The remote operation interface is the same as the operation interface of the central touch screen, and all data displays and operation adjustments are synchronously displayed, changed, and executed on the central system and equipment. Except for selecting automatic pressure closing in the remote pressure closing method, other operations are the same as on-site operations.

[0047] In this embodiment, through research, it is found that in addition to being related to the change in the supply-demand relationship between the liquid level and the liquid supply volume and liquid output volume, the dynamic liquid level is also affected by the tidal relationship and the waxing and waning of the moon. The specific description is as follows: First, the earth's tidal changes are mainly affected by the gravitational force of the moon (the sun has a relatively small influence). The rising tide during the day is called "tide", and the rising tide at night is called "ebb tide". They are just different names for the rising tide, rising and falling continuously. According to the summary and analysis of the oil production data of the fully intelligent oil production equipment based on the all-metal conical screw pump, it is found that the underground liquid level is the same as the tidal changes of the sea. Whenever facing the moon, the underground liquid level will rise. At this time, the liquid supply capacity will be sufficient. Under the same conditions, the output will increase, the unit energy consumption will decrease, and increasing the output at this time does not worry about insufficient liquid supply. When facing away from the moon, it will also rise because the liquid is flexible. When facing the moon, under the action of the lunar gravitational force, the liquid on the earth is sucked up by the gravitational force and swells during the rising tide. On the side facing away from the moon, it is affected by the fact that water flows to lower places, so there will also be a rising tide. However, at the same time, the liquid level will drop in other places. When the tide ebbs, the underground liquid level will drop, and the liquid supply capacity will decrease. It has little impact on the well positions with sufficient liquid supply usually, but if the liquid supply is usually at the critical value of insufficiency and the ebb tide occurs, it will have a great impact, and even cause a supply cut-off in severe cases. It is found that the rise and fall of the underground liquid level is basically the same as the tidal changes of the sea. It starts to rise at the beginning of each month and reaches the peak on the 15th and 16th, and then starts to fall. Of course, there is a rise and a fall, and it will be relatively flat or ebb at other times. Different regions and different positions have different display characteristics. The closer to the sea, the more obvious it is. However, the corresponding relationship between the underground liquid level and the liquid supply capacity at the same location changes with the tide is determined.

[0048] Therefore, in this embodiment, the central control system 201 can adjust the oil production strategy of the all-metal conical screw pump in a timely manner according to the corresponding relationship between the underground liquid level and the liquid supply capacity at the oil production location changing with the tide, and set the corresponding dynamic liquid level height and production interval, so as to maximize the oil production volume both during the ebb and flow of the tide, and thus maximize the daily oil production volume. It is worth mentioning that based on the above corresponding relationship between the underground liquid level and the liquid supply capacity changing with the tide, as well as the number of fully intelligent oil production equipment based on the all-metal conical screw pump used in the oil field, it is also possible to accurately predict the daily oil production volume of each oil field, providing data support for oil production management.

[0049] The following is a detailed implementation plan for the fully intelligent oil production control system 200 based on the all-metal conical screw pump in this embodiment to achieve real-time warning and precise compensation for the wear of the rotor of the all-metal conical screw pump. After compensation, the pump efficiency is as good as new, and the service life of the screw pump is greatly extended: First, monitor whether the all-metal conical screw pump is worn; Second, if the monitoring result is yes, determine the wear amount of the rotor of the all-metal conical screw pump; Third, determine the compensation amount required for the rotor of the all-metal conical screw pump according to the wear amount of the rotor of the all-metal conical screw pump; Fourth, control the rotor of the all-metal conical screw pump to descend by the height of the compensation amount to compensate for the stator-rotor clearance of the all-metal conical screw pump, and complete the wear compensation of the all-metal conical screw pump. It should be noted that the all-metal conical screw pump is installed underground and includes a stator and a rotor. The stator is provided with an internal thread surface, and the rotor is installed inside the stator and is provided with an external thread surface that matches the internal thread surface. Both the internal thread surface and the external thread surface are conical spiral structures and have the same taper.

[0050] Exemplarily, in this embodiment, monitoring whether the all-metal conical screw pump is worn includes: setting the normal mining torque range of the rotor of the all-metal conical screw pump; judging whether the real-time torque of the rotor of the all-metal conical screw pump is lower than the lower limit value of the normal mining torque range; if the judgment result is yes, judging whether the decrease ratio of the liquid output under the current oil-water ratio reaches the set value; if the judgment result is yes, determining that the all-metal conical screw pump is worn.

[0051] It should be noted that because the underground conditions are relatively complex and the liquid composition will have a significant impact on the torque, the all-metal conical screw pump divides all oil wells into two categories: heavy oil wells and normal production wells according to the torque limit of the driving motor, and divides the well depth into two categories: within 800 meters and above 800 meters.

[0052] Exemplarily, within 800 meters of the normal production well in this embodiment, during normal production, the torque value is generally set in the range of 80 - 600 N. An alarm is issued when it is lower than the lower limit value, and an alarm is also issued when it is higher than the upper limit value; the torque alarm limit value is set, for example, at 800 N. When the limit value of 800 N is exceeded, an alarm is issued and the torque is forcibly unloaded. Exemplarily, for normal production wells above 800 meters in this embodiment, the torque value is generally set in the range of 100 - 800 N during normal production. An alarm is issued when it is lower than the lower limit value, and an alarm is also issued when it is higher than the upper limit value; the torque alarm limit value is set, for example, at 1000 N. When the limit value of 1000 N is exceeded, an alarm is issued and the torque is forcibly unloaded. Exemplarily, within 800 meters of the heavy oil well in this embodiment, during normal production, the torque value is generally set in the range of 100 - 900 N. An alarm is issued when it is lower than the lower limit value, and an alarm is also issued when it is higher than the upper limit value; the torque alarm limit value is set, for example, at 1000 N. When the limit value of 1000 N is exceeded, the system will issue an alarm and forcibly unload the torque. Exemplarily, for heavy oil wells above 800 meters in this embodiment, during normal production, the torque value is generally set in the range of 120 - 900 N. An alarm is issued when it is lower than the lower limit value, and an alarm is also issued when it is higher than the upper limit value; the torque alarm limit value is set at 99% of the limit value (the torque limit value of the motor is generally between 1050 - 1500 N) before an alarm is issued and the torque is forcibly unloaded.

[0053] Exemplarily, in this embodiment, if the real-time torque of the all-metal conical screw pump rotor is lower than the lower limit value of the normal production torque range, the drive motor will promptly feedback to the central control cabinet, provide an alarm, and perform the following operations: First, based on the liquid production volume and oil-water ratio data regularly transmitted back by the liquid volume ratio sensor installed at the wellhead or the real-time oil production data manually fed back, determine whether the liquid production volume is normal. If the liquid production volume is normal, this alarm is lifted; Second, if the liquid production volume is lower than the normal value, then determine the reduction ratio of the liquid production volume; Exemplarily, in this embodiment, the reduction ratio of the liquid production volume is set from small to large as level 1, level 2, and level 3, and determine whether the reduction ratio of the liquid production volume under the current oil-water ratio reaches level 3. If it does not reach level 3, control the drive motor to increase the speed until the set liquid production volume range is reached. Among them, in this embodiment, level 1 and level 2 are generally set within 1 / 3 of the normal value of the overall liquid production volume. Third, if the reduction ratio of the liquid production volume under the current oil-water ratio reaches level 3, and the increased speed of the drive motor is not proportional to the liquid production volume of the pump diameter, then control the automatic closed pressure valve installed at the wellhead to perform an automatic closed pressure test of the pump efficiency. If the pressure display cannot reach the set value within the specified time (for example, generally set that the wellhead closed pressure reaches 5 mpa within 5 minutes), it proves that the all-metal conical screw pump is worn, the clearance between the stator and rotor of the all-metal conical screw pump becomes larger, and the pump efficiency decreases. Then, it is necessary to control the lifting sensor system 203 to lower the position of the limiter of the position controller, lower the position of the rotor, and the stator and rotor resume the clearance fit to restore the best pump efficiency.

[0054] It should be noted that when the position is adjusted, the closing pressure valve will be closed first, and then the speed will be adjusted to restore the speed of the initial normal mining, so that the initial pump efficiency can be accurately debugged in the next step. According to the following, the working principle of the lifting sensor system 203 and the position controller, for example, the central control system 201 instructs the lifting sensor system 203 to lift 7 times as an adjustment cycle, and the screw thread of the regulator will be rotated down one circle, and the rotor will drop 2mm. After each adjustment cycle of the lifting sensor system 203, the set time, for example, 5 minutes, will be stopped to allow the sensor of the closing pressure valve to transmit stable timing data. This is repeated until the closing pressure pump efficiency reaches the initial set normal value, and the lifting sensor system 203 stops working. Because the torque during closing pressure is bound to be higher than that during normal production, the torque during closing pressure will automatically be limited to the limit value of the driving motor. After the closing pressure test meets the standard, the closing pressure valve automatically opens, and the all-metal conical screw pump resumes mining. The central control system 201 re-determines the liquid output and torque according to the height of the real-time dynamic liquid level, so that the adjusted pump can achieve the effect of the new pump. If necessary, it is necessary to review and debug. For example, in this embodiment, the central control system 201 re-determines the liquid output and torque based on the real-time dynamic liquid level height because for every 100-meter drop in the dynamic liquid level, the thrust needs to be increased by 1 MPa, and the torque needs to be increased by 20-30 Newtons. For every 10% increase in the oil content in the oil-water ratio, the liquid output needs to be reduced by 10-20%, and the torque needs to be increased by 20-50 Newtons.

[0055] Exemplarily, in this embodiment, the wear amount of the all-metal conical screw pump rotor is determined; and according to the wear amount of the all-metal conical screw pump rotor, the compensation amount required for the all-metal conical screw pump rotor is determined, specifically including:

[0056] In this embodiment, if it is determined that the rotor of the all-metal conical screw pump is worn, the lifting sensor system 203 controls the rotor position to drop by 2 mm for every 10% drop in the liquid output below the set normal value. In this embodiment, if it is determined that the rotor of the all-metal conical screw pump is worn, the lifting sensor system 203 controls the rotor position to drop by 2 mm for every 10% drop in the torque below the lower limit of the normal mining torque range. If there is an error of, for example, 10% after the initial adjustment, the central control system 201 will automatically retest according to the result. If the pump efficiency does not reach the set normal value after compensation, the central control system 201 will make a secondary adjustment and compensation after automatic detection until it reaches the standard.

[0057] Exemplarily, in this embodiment, controlling the rotor of the all-metal conical screw pump to drop by the compensation amount to compensate for the stator-rotor clearance of the all-metal conical screw pump and complete the wear compensation of the all-metal conical screw pump includes:

[0058] Control the lifting movement of the lifting sensor system 203 installed on the wellhead; the position controller installed downhole drives the full-metal conical screw pump rotor to descend by the height of the compensation amount under the drive of the lifting movement of the lifting sensor system 203.

[0059] Specifically, in this embodiment, the lifting sensor system 203 is hard-linked to the drive bearing box and the sucker rod. In this embodiment, the lifting sensor system 203 belongs to a surface device, which can accurately control the overall lifting of the entire sucker rod and its connectors and attachments, and can achieve an effective lifting stroke of 0 - 2000 mm or more. This lifting stroke actually refers to the lead screw stroke. Theoretically, the longer the lead screw is made, the longer the stroke can be, as long as the operation safety can be controlled. The position controller is a downhole device, and its normal installation position is 4 - 10 meters above the upper mouth of the pump, but it is not limited to this and can be adjusted according to the actual application scenario. The position controller includes a limiter and a regulator; the limiter is a hollow outer cylinder device of the position controller, which is screwed and fixed on the tubing, supports and positions the regulator, and anchors the limiter; the regulator is the core device of the position controller, with its upper and lower ends screwed on the sucker rod, supported and limited by the limiter, and connected to the full-metal conical screw pump rotor through the sucker rod. The lifting sensor system 203 and the regulator are connected into a whole through the sucker rod and lift in unison.

[0060] Specifically, in this embodiment, to control the lifting movement of the lifting sensor system 203 installed on the wellhead, the regulator is driven by the sucker rod to press against the limiter, and the adjusting rod generates a rotational force under the extrusion of the limiter, thereby converting the up-and-down movement into a directional screwing movement through the regulator, causing the adjusting bolt of the adjusting rod to be screwed. The screwing of the adjusting bolt causes the position of the full-metal conical screw pump rotor to descend. Repeat the above process until the position of the full-metal conical screw pump rotor descends by the height of the compensation amount.

[0061] Specifically, in this embodiment, the process of repeating the above process until the position of the full-metal conical screw pump rotor descends by the height of the compensation amount includes:

[0062] According to the pitch of each thread stroke of the adjusting bolt of the adjusting rod and the thread stroke that the adjusting bolt can be rotated by one lift of the lifting sensor system 203, calculate the number of lifts of the lifting sensor system 203 required for the adjusting bolt of the adjusting rod to be screwed one circle, and set the adjusting process of the adjusting bolt of the adjusting rod being screwed one circle as an adjustment cycle; calculate the number of adjustment cycles required for the position of the full-metal conical screw pump rotor to descend by the compensation amount according to the compensation amount required by the full-metal conical screw pump rotor, and control the lifting sensor system 203 to act according to the calculation result until the position of the full-metal conical screw pump rotor descends by the height of the compensation amount.

[0063] Exemplarily, in this embodiment, for example, there are 7 pairs of upper and lower mating teeth in one turn of the adjusting screw of the regulator. Each time the elevator presses down, the mating teeth move forward one tooth along the inclined plane. When rising, the spring will separate the mating teeth. Repeating this way, when the elevator rises and falls 7 times, the regulator screw turns exactly one circle. And the pitch of each turn of the regulator thread is about 2 mm. Therefore, every time the elevator rises and falls 7 times, the rotor descends and compensates by 2 mm. For example, when the central control system 201 detects that the liquid discharge volume has decreased by more than 1 / 3, according to the above-set rules, at this time, the rotor should at least descend 6 mm. Then, according to the known conditions, the central control system 201 will instruct the elevator to first perform 3 adjustment cycles, a total of 21 rises and falls. Thus, according to the known data, set programs, mechanical conditions, etc., the solution of the embodiment of the present invention can accurately determine the compensation height to: each rise and fall of the lift sensor system 203 can make the rotor descend and compensate by about 0.3 mm, and each adjustment cycle has 7 times (not limited to this), which can compensate by 2 mm, achieving accurate compensation for the worn rotor.

[0064] Exemplarily, in this embodiment, controlling the lifting and lowering movement of the lift sensor system 203 arranged on the wellhead; before the position controller arranged underground drives the full-metal conical screw pump rotor to descend by the height of the compensation amount driven by the lifting and lowering movement of the lift sensor system 203, it further includes:

[0065] I. Determining the zero position of the elevator in the lift sensor system 203, and the positive and negative values of the elevator's lifting and lowering are determined based on this zero position: Exemplarily, during the commissioning before starting a newly installed pump, first manually input a position number on the screen of the central control system 201, then click the position confirmation. After the elevator runs in place, click to set the zero position with this position. All subsequent elevator liftings and lowerings are determined with the zero position as the positive and negative values. It should be noted that generally, the given position is generally based on the heaviest position displayed by the weighing system minus 200 - 500 kg, but it is necessary to ensure that there is a clearance margin of 10 - 20 mm at the lower opening of the bearing box to prevent the bearing box from hitting when the elevator descends to the zero position. In this embodiment, the position controller also adjusts up and down with this zero position as the lower fixed point.

[0066] II. Determine the disengaging point and contacting point of the position controller: When commissioning the equipment after it is installed in the well and before production starts, it is first necessary to determine the disengaging point and contacting point of the position controller based on the weighing data of the weighing system, and use this as a reference to provide data support and mechanical travel margin for the precise adjustment of the position controller: 1. When the elevator is statically commissioned, if the downhole position controller disengages during lifting, then at this time, the elevator will support the static weights of the entire drive bearing box, sucker rod, rotor and other production systems. At the same time, this weight will naturally press on the weighing system, and the data will be synchronously displayed on the central screen in real time. 2. If the elevator continues to rise at this time but the weighing display does not change or fluctuate, it can be confirmed that the position controller has disengaged, and the weight at this time is also the heaviest in the static state. 3. When it is confirmed that the position controller has disengaged, slowly lower the elevator and determine the approximate positions of the elevator when the weighing display is the heaviest and when it becomes lighter. If the position of the elevator does not change after repeating the weight change three times, then the basic positions of the limiter disengaging and contacting can be confirmed. At this time, lower the elevator to a position about 200 - 500 kg further to compact the spring virtual position of the limiter to reach the formal production position. It should be noted that this is related to the high-speed steel of the contact part during limiting. If the spring is not compacted, the contact part will have virtual contact wear. If it is compacted, the load-bearing bearing of the limiter itself will rotate, the contact part will have less wear, and the life of the position controller will be increased. 4. The weight display of the weighing system and the load bearing of the limiter are opposite. Whenever the weighing value increases, the load bearing of the downhole limiter will necessarily decrease. If the weighing value decreases, the situation of the limiter is just the opposite, and whether it is static or dynamic, the theoretical value should remain the same.

[0067] The following specifically describes how the fully intelligent oil production control system 200 based on the all-metal conical screw pump in this embodiment realizes the automatic prevention and elimination of sand jamming and sand burial in the following process, effectively and comprehensively solving the problem of sand jamming and sand burial of the screw pump: I. Set the normal production torque range and torque alarm limit value of the all-metal conical screw pump; II. Determine whether the real-time torque of the rotor of the all-metal conical screw pump is higher than the upper limit value of the normal production torque range; III. If the judgment result is yes, then determine whether the real-time torque of the rotor of the all-metal conical screw pump is higher than the torque alarm limit value; IV. If the real-time torque is lower than the torque alarm limit value, determine whether the liquid supply is sufficient according to the height of the dynamic liquid level. If it is sufficient, it is determined that the sand content in the liquid is overloaded, and the central control system 201 controls the lifting sensor system 203 to execute the torque overload program to remove sand until the torque returns to the normal production torque range, and the sand jamming is eliminated; V. If the real-time torque is higher than the torque alarm limit value, the central control system 201 issues an alarm and directly determines that sand jamming has occurred, and controls the lifting sensor system 203 to execute the torque forced unloading program to remove sand until the torque returns to the normal production torque range, and the sand jamming is eliminated.

[0068] Exemplarily, in this embodiment, it is determined whether the real-time torque of the all-metal conical screw pump rotor is higher than the upper limit of the normal production torque range; if the judgment result is yes, it is determined whether the real-time torque of the all-metal conical screw pump rotor is higher than the torque alarm limit; if the real-time torque is lower than the torque alarm limit, it is determined whether the liquid supply is sufficient according to the height of the dynamic liquid level, and if it is sufficient, it is determined that the liquid sand content is overloaded, and the central control system 201 controls the lifting sensor system 203 to execute the torque overload program to discharge sand until the torque returns to the normal production torque range, and the sand jam is removed, including: when the torque is higher than the upper limit of the normal production torque range, the weighing sensor system 204 first converts the height of the downhole dynamic liquid level according to the weight of the entire pipe oil to determine whether the liquid supply is insufficient. If so, the optimal constant speed production volume of the current liquid level is automatically calculated to appropriately reduce the liquid output to prevent dry production after the liquid level returns to zero; if the liquid supply is sufficient, it is determined that the torque is increased due to the overload of the liquid sand content, and the central control system 201 performs automatic sand discharge according to the data detected at the wellhead and the preset torque overload program until the torque returns to normal.

[0069] Exemplarily, in this embodiment, the central control system 201 controls the lifting sensor system 203 to execute the torque forced unloading procedure to discharge sand until the torque returns to the normal mining torque range, including: the central control system 201 issues an instruction to force the lifting sensor system 203 to rise, and when the weighing sensor system 204 shows that the full pipe oil has reached the maximum value, the weight begins to drop, the stator and rotor of the all-metal conical screw pump are out of contact, the downflow channel around the rotor will open, and the full pipe oil will be discharged until the torque is unloaded; when the torque returns to the normal mining torque range, the central control system 201 instructs the lifting sensor system 203 to restore the position of the last normal mining to try mining, until all data such as torque is normal, the bearing box does not reverse, etc. meet the set indicators before formal mining. If the torque continues to be overloaded after mining again, the lifting sensor system 203 will rise repeatedly according to the preset program, and the position of each repeated rise is higher than the set value of the last rise, until the torque returns to normal; it should be noted that the set value here is generally set to the height value adjusted by an adjustment cycle, which is convenient for calculating the number of limiter adjustments.

[0070] Exemplarily, in this embodiment, if the real-time torque of the all-metal conical screw pump rotor is instantaneously overloaded, the central control system 201 automatically starts the shutdown procedure, the elevator goes up to the maximum value, and at the same time, the ultimate safety program is started to release the torque until the torque returns to zero. The starting of the ultimate safety program to release the torque until the torque returns to zero includes: setting up a torque safety system, installed on the reverse side of the control cabinet of the central control system 201, which consists of n resistors; after the ultimate safety program is started, the resistors use resistance to prevent the motor from rotating at high speed in reverse and control the reverse rotation at a safe speed, so that when the torque is slowly unloaded, a reaction force is formed with the high torque transmitted from the well bottom, making the sucker rod tighter and preventing it from coming off until the torque returns to zero. Exemplarily, in this embodiment, when the all-metal conical screw pump is ready to shut down, the central control system 201 does not control the oil production equipment to shut down immediately. Instead, it first instructs the lifting sensor system 203 to rise by a preset height, opens the clearance channel between the stator and rotor of the all-metal conical screw pump, and at the same time reduces the speed to the set speed within the set time according to the set descending logic, unloads the torque and the full pipe of liquid until the torque returns to the set shutdown safety value; when the torque returns to the set shutdown safety value and the change range is within the set fluctuation range, the central control system 201 determines safety and controls the oil production equipment to shut down, realizing the prevention of sand jamming and sand burial during shutdown.

[0071] Specifically, in this embodiment, when the all-metal conical screw pump is ready to shut down, the central control system 201 does not control the oil production equipment to shut down immediately. Instead, according to the shutdown procedure logic, it first instructs the lifting sensor system 203 to rise by more than 100 - 1000 mm, opens the clearance channel between the stator and rotor of the all-metal conical screw pump, and at the same time slowly reduces the speed to 60 revolutions per minute within 5 minutes. While slowly releasing the torque, it unloads the full pipe of liquid until the torque returns below 50 N and there is no obvious fluctuation (for example, within 3 - 5 N). Only then will the central control system 201 determine safety and then officially shut down. It should be noted that in practical applications: a. According to the different well depths, the preset shutdown rising height is also different because the sucker rod will have a stretch of 1 - 4 / 10000 under the load-bearing state; b. The mechanical parameters of the lifting stroke of the elevator are different. For example, if the lifting stroke of an elevator is only 500 mm, then the preset shutdown rising height can be at most 250 mm, leaving half of the margin for height adjustment during operation.

[0072] Exemplarily, when the all-metal conical screw pump in this embodiment is ready to start, the central control system 201 will not directly control the oil production equipment to start. Instead, it will first determine whether the drive motor can accelerate the speed to the preset self-check speed within the set time and determine whether the torque is within the set normal production torque range during this period. If the drive motor can accelerate the speed to the preset self-check speed within the set time and the torque is within the set normal production torque range during this period, the central control system 201 determines that the start is safe and instructs the oil production equipment to start. If the torque exceeds the upper limit value of the set normal production torque range during the period when the drive motor accelerates the speed to the preset self-check speed within the set time, the central control system 201 controls the lifting sensor system 203 to execute the torque overload program to remove sand until the torque returns to the normal production torque range until the central control system 201 determines that the start is safe.

[0073] Specifically, when clicking to start in this embodiment, the oil production equipment will not start directly. The central control system 201 will first start the self-check program at startup and instruct the motor to accelerate uniformly from 20 revolutions per minute to 100 revolutions per minute within 5 minutes. Generally, it is set that every 10 integers are an acceleration level, and each acceleration level rotates 10 circles. During this process, the torque does not exceed the normal production torque range set for each well. After the central control system 201 determines that the start is safe, it will order a formal start.

[0074] The advantages of the fully intelligent oil production control system 200 based on the all-metal conical screw pump provided by the embodiments of the present invention are as follows: First, it can collect and store various well condition data, debugging data, production data, warning data, correction data, control data, and all other data in real time and store them in the remote data terminal. Second, it realizes the real-time warning and precise compensation of the rotor wear of the all-metal conical screw pump. After compensation, the pump efficiency is like new, and the service life of the screw pump is greatly extended. Third, it realizes the automatic prevention and elimination of sand jamming and sand burial, effectively and comprehensively solving the problem of sand jamming and sand burial of the screw pump. Fourth, according to the corresponding relationship between the underground liquid level and the liquid supply capacity changing with the tide, the corresponding dynamic liquid level height and production range are set to maximize the oil production. The fully intelligent oil production control system 200 based on the all-metal conical screw pump provided by the embodiments of the present invention truly realizes the intelligence of the oil production equipment, reduces the overall cost of oil production, improves the oil production efficiency, saves manpower, is safe and reliable, and is suitable for popularization and application.

[0075] Note that the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An all-intelligent oil production control system based on a fully metal conical screw pump, characterized in that, include: Central control system, torque sensor system, lifting sensor system, weighing sensor system and pressure sensor system; the central control system is connected with the torque sensor system, lifting sensor system, weighing sensor system and pressure sensor system; the torque sensor system is connected with the driving motor to obtain the torque data of the all-metal conical screw pump rotor in real time and output it to the central control system for processing; the lifting sensor system is connected with the lifting motor to perform corresponding lifting actions and adjust the lifting of the all-metal conical screw pump rotor according to the control instructions output by the central control system; the weighing sensor system is used to output the weighing data to the central control system on the one hand, calculate and display the dynamic liquid level in real time; on the other hand, it is used to output the weighing data to the central control system, and the central control system determines the disengagement point and contact point of the positioner according to the weighing data: the pressure sensor system is used to control the closed pressure test pump efficiency through the central control system, and send the collected data including but not limited to pressure, temperature and timing to the central control system for processing.

2. The fully intelligent oil production control system based on a fully metal conical screw pump according to claim 1, wherein It also includes a power control system; the power control system is used to make functional directive power transmission and distribution, power cut-off and ultimate safety instructions to each power consumption system based on the received real-time data.

3. The fully intelligent oil production control system based on the all-metal conical screw pump according to claim 1, characterized in that, It also includes an ultimate safety system; the ultimate safety system includes a torque out-of-control safety system; the torque out-of-control safety system is connected to the central control system and is used to use resistance to prevent the motor from reversing at high speed when the torque is overloaded and out of control, and to control the reversal at a safe speed so that the torque can be slowly unloaded and the high torque transmitted from the underground can form a reaction force, so that the sucker rod will not fall off until the torque returns to zero.

4. The fully intelligent oil production control system based on a fully metal conical screw pump according to claim 3, characterized in that The ultimate safety system also includes a vibration safety system; the vibration safety system is used to collect vibration, jitter and shaking data of well equipment in real time, and issue an early warning or control shutdown when an abnormality is determined.

5. The fully intelligent oil production control system based on the all-metal conical screw pump according to claim 3, characterized in that, The torque out-of-control safety system is installed on the back of the control cabinet of the central control system and is composed of n resistors.

6. The fully intelligent oil production control system based on a fully metal conical screw pump according to claim 1, wherein The weighing sensor system is specifically used to collect dynamic net weight and static net weight. The central control system calculates the liquid lifting net weight based on the dynamic net weight and static net weight, and calculates the dynamic liquid level based on the liquid lifting net weight and the liquid net weight per meter.

7. The fully intelligent oil production control system based on a fully metal conical screw pump according to claim 1, characterized in that, The torque sensor system includes but is not limited to a drive motor, a power line, a frequency conversion sensor, a processor and a resistor; the lifting sensor system includes but is not limited to a lift, a lifting motor, a sensor, an electric wire, a signal line, a frequency converter and a processor. The sensor is arranged at the tail of the lifting motor, and calculates and feeds back the position of the lift in real time according to the speed ratio of the lift and the lifting motor.

8. The fully intelligent oil production control system based on a fully metal conical screw pump according to claim 1, wherein, The pressure gauge sensor system is composed of components installed at the wellhead, including but not limited to an automatic pressure-closing valve, a pressure sensor, electrical wires, a signal line, and a processor. The speed and limit of the pressure rise within the limited time of each pressure closure are the basis for judging whether the pump efficiency is qualified, whether the stator and rotor are worn, and whether adjustment and compensation are required.

9. The fully intelligent oil production control system based on a fully metal conical screw pump according to claim 1, characterized in that, The central control system is preset with a fully intelligent control mode, a manual control mode, and a remote control mode, and realizes the switching among the fully intelligent control mode, the manual control mode, and the remote control mode according to the switching instructions input by the user; the central control system is also used to synchronously record and transmit all kinds of well condition data, debugging data, production data, warning data, correction data, control data, and all other data collected by the system, and store them in a remote data terminal.

10. The fully intelligent oil production control system based on a fully metal conical screw pump according to any one of claims 1 to 9, characterized in that, The central control system is also used to set corresponding flowing fluid level heights and production intervals according to the corresponding relationship between the underground liquid level and the liquid supply capacity changing with the tide, so as to maximize the oil production.

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