Intelligent parameter adjusting device of oil pumping unit and control method of intelligent parameter adjusting device

Abstract

The intelligent parameter adjusting device comprises a shell, an intelligent parameter adjusting system, an air switch and a contactor are arranged in the shell, a power source is arranged outside the shell, and a display control module is further arranged on an external panel of the shell. The power supply is electrically connected with the air switch, the contactor and the intelligent parameter adjusting system; the power source is electrically connected with the air switch, the contactor, the intelligent parameter adjusting system and the display control module, and the intelligent parameter adjusting system is further connected with a pumping unit motor arranged outside the shell. Compared with a traditional frequency converter, the parameter adjusting device has the advantages that power input side working current and voltage detection is added, the underground working condition of an oil well can be accurately judged, closed-loop control is carried out through parameter comparison, analysis and operation, and therefore the oil well is made to run at the optimal system efficiency all the time, and the purposes of saving energy and reducing comprehensive cost are achieved. The invention further discloses a control method of the parameter adjusting device, sensorless closed-loop control is adopted, and the control process is few in links, short in path, high in speed and high in precision.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent control of oil pumping units and relates to an intelligent parameter adjustment device for oil pumping units. The present invention also relates to a control method for the above-mentioned intelligent parameter adjustment system. Background Art

[0002] At present, due to the factors such as the annual decline of oil reservoirs, the number of low-yield wells in domestic oil field exploitation continues to increase, accounting for about 50%. Restricted by the technology of mechanical extraction equipment and control technology, the inefficient operation of low-yield oil wells has become a common phenomenon. The operating pump efficiency of most low-yield wells is less than 30%, and even some oil wells operate at a pump efficiency of less than 10% or are pumped empty. The inefficient operation of oil well exploitation results in high energy consumption per ton of liquid, rapid wear of pipe-rod pumps, and increased comprehensive costs.

[0003] The main reasons for the above problems are: (1) The existing technology cannot control the reasonable pumping efficiency of oil well exploitation. The extraction speed of most oil wells is greater than the fluid supply energy, resulting in low pumping efficiency or even empty pumping; (2) The parameters cannot be adjusted automatically. The surface extraction speed cannot match the changes in the downhole fluid supply energy in real time, so it is impossible to control the optimal supply-production balance parameters, resulting in the inability to maximize the fluid production.

[0004] In response to the above problems, our company has developed a new intelligent parameter adjustment device for oil pumps and its control method. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent parameter adjustment device for an oil pump, which can automatically control the oil pump to operate stably under the optimal parameter state, effectively realize the maximization of liquid production, the minimization of energy consumption, and the rationalization of pump efficiency, thereby achieving a supply-production balance operation state with the most optimized system efficiency.

[0006] The present invention also provides a control method for the above-mentioned intelligent parameter adjustment device for the oil pump, in which the electrical parameter data of the oil well operation is directly collected for analysis, calculation and regulation, with fewer links, shorter paths, faster speed and higher accuracy.

[0007] The technical solution adopted by the present invention is: an intelligent parameter adjustment device for an oil pumping unit, comprising a housing, an intelligent parameter adjustment system, an air switch and a contactor are arranged inside the housing, a power supply is arranged outside the housing, and a display and control module is also arranged on the outer panel of the housing; The power supply is connected in series with the air switch, the contactor and the intelligent parameter adjustment system; the power supply is connected in series with the air switch, the contactor, the intelligent parameter adjustment system and the display and control module, and the output end of the intelligent parameter adjustment system is connected to the oil pump motor arranged outside the shell.

[0008] The present invention is also characterized in that: The intelligent parameter adjustment system includes a detection control unit and a speed regulation drive unit; the detection control unit includes an electrical parameter detection unit, a CPU calculation unit and a drive control unit; the speed regulation drive unit includes a rectifier unit and an IGBT power driver.

[0009] The electrical parameter detection unit is used to receive the real-time electrical parameter data of the oil pumping motor fed back by the IGBT power driver and optimize it, and transmit the optimized real-time electrical parameter data to the CPU calculation unit and the display and control module; the CPU calculation unit is used to calculate the optimized real-time electrical parameter data and transmit the calculation result to the driver control unit, and the driver control unit is used to convert the calculation result of the CPU calculation unit into an action instruction and issue it to the IGBT power driver; the rectifier unit is used to control the AC / DC conversion of the power supply; the IGBT power driver is used to drive the oil pumping motor to move; the IGBT power driver is used to drive the oil pumping motor to move and transmit the real-time electrical parameter data of the oil pumping motor to the electrical parameter monitoring unit; the display and control module is used to display the real-time electrical parameter data of the oil pumping motor 6.

[0010] The real-time electrical parameter data includes the real-time strokes of the pumping unit motor and the real-time effective stroke of the pumping unit.

[0011] The model of the electrical parameter detection unit is: TX-ZNJC-CYJ-YL-01, the model of the CPU calculation unit is: YF-ZNJS-CYJ-YL-02, the model of the drive control unit is: TXYF-ZQ-002, the model of the rectifier unit is: QL-380V 60A, the model of the IGBT power driver is: FF450R12KT4, and the model of the display and control module is: TXYF-XK-YL002.

[0012] The second technical solution adopted by the present invention is: a control method of an intelligent parameter adjustment device for an oil pumping unit, and the specific steps are as follows: Step 1: Receive the real-time electrical parameter data of the oil pumping unit fed back by the IGBT power driver through the detection control unit in the intelligent parameter adjustment system, optimize it through the filtering algorithm, and transmit the optimized real-time electrical parameter data to the CPU calculation unit and the display and control module; Step 2: The CPU calculation unit calculates the received real-time electrical parameter data and transmits the calculation result to the driver control unit; Step 3: The driver control unit converts the calculation result of the CPU calculation unit into an action instruction and sends it to the IGBT power driver; Step 4: The IGBT power driver drives the pumping unit motor to operate and adjust the speed of the pumping unit motor.

[0013] The present invention is also characterized in that: The real-time electrical parameter data in step 1 include the real-time stroke frequency of the pumping unit motor and the real-time effective stroke of the pumping unit.

[0014] The calculation process of real-time electrical parameter data in step 2 is as follows: Step 2.1: Calculate the theoretical liquid production Q at each time state based on the number of strokes of the pumping unit motor running for 30 minutes and the effective stroke of the pumping unit fed back by the IGBT power driver. 理 , the maximum theoretical liquid production Q 理 As the standard liquid production Q 标准 ; Step 2.2: Collect the real-time strokes, real-time current, real-time voltage, real-time torque, real-time power and real-time effective stroke of the pumping unit motor during operation, and calculate the actual liquid production of the oil well under the current state. ; Step 2.2: Compare the standard liquid production Q 标准 and the actual liquid production of the current state oil well , compared with the actual liquid production With standard liquid production Q 标准 The comparison result is sent to the drive control unit.

[0015] Theoretical liquid production Q 理 The calculation process is as follows: , where D is the pump piston diameter, n is the average strokes during operation, the average stroke is the average of 4 real-time strokes, and S is the theoretical effective stroke of the piston, which is the standard liquid production Q 标准 The effective stroke of the state; the actual liquid production The calculation process is as follows: , where Ns is the real-time stroke of the pumping unit motor, Ap is the plunger cross-sectional area, Spe is the real-time effective stroke of the plunger, and ΔQp is the leakage per cycle.

[0016] The specific process of step 4 is as follows: If the actual liquid production Greater than standard liquid production Q 标准 , it means that the downhole fluid supply energy increases and the effective stroke increases, and it is necessary to accelerate the extraction, that is, instruct the IGBT power driver to drive the pumping unit motor to increase the stroke frequency; when it runs to the theoretical effective stroke position, the stroke frequency at this position is maintained; if the actual fluid production Less than standard liquid production Q 标准 , it means that the downhole fluid supply energy is reduced and the effective stroke is reduced, and the pumping speed needs to be reduced, that is, the IGBT power driver is instructed to drive the pumping unit motor to reduce the stroke frequency, and when it runs to the theoretical effective stroke position, the stroke frequency at that position is maintained.

[0017] The beneficial effects of the present invention are: (1) The intelligent parameter adjustment device for the oil pump of the present invention adds working current and voltage detection on the power input side compared with the traditional frequency converter, and can accurately judge the working condition of the oil well downhole by analyzing the relationship between "current-voltage-power-torque-strokes-effective strokes-liquid production". Then, closed-loop control is performed through the comparison and analysis of these parameters, so as to control the oil well to always operate in the supply-production balance parameter state with maximum liquid production, minimum energy consumption and optimal system efficiency, so as to achieve the purpose of saving energy and reducing comprehensive costs.

[0018] (2) The control method of the intelligent parameter adjustment device of the oil pumping unit of the present invention adopts artificial intelligence measurement and control technology to achieve "intelligent perception, intelligent analysis, automatic control, and continuous optimization". It ensures that the oil well production, extraction, supply and production balance and system efficiency are continuously and stably operated in the most optimized state; it adopts sensorless closed-loop control, with fewer control process links, shorter paths, faster speed and higher accuracy. The control method of the present invention has achieved relatively significant energy-saving effects in the actual application of oilfield pumping units, with energy-saving rates between 10% and 70%, production increases between 5% and 20%, operation and maintenance management costs reduced by more than 10%, operation and maintenance costs reduced by more than 30%, and well repair operations and other costs reduced by more than 30%. The system efficiency is improved by more than 5 percentage points. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the intelligent parameter adjustment device for the oil pumping unit of the present invention; Figure 2 It is a structural diagram of the intelligent parameter adjustment system in the intelligent parameter adjustment device for the oil pumping unit of the present invention; Figure 3 It is a circuit diagram of each module in the intelligent parameter adjustment device for the oil pumping unit of the present invention; Figure 4 It is a flow chart of the control method of the intelligent parameter adjustment device of the oil pumping unit of the present invention.

[0020] Among them, 1. Shell, 2. Intelligent parameter adjustment system, 3. Air switch, 4. Contactor, 5. Power supply, 6. Pump motor, 7. Display and control module, 8. Detection control unit, 9. Speed ​​regulation drive unit, 10. Electrical parameter detection unit, 11. CPU calculation unit, 12. Driver control unit, 13. Rectification unit, 14. IGBT power driver. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Embodiment 1: Intelligent parameter adjustment device for oil pumping unit, the structure is as follows Figure 1As shown, it includes a shell 1, an intelligent parameter adjustment system 2, an air switch 3 and a contactor 4 are arranged inside the shell 1, a power supply 5 is arranged outside the shell 1, and a display and control module 7 is also arranged on the external panel of the shell 1; the power supply 5 is electrically connected to the air switch 3, the contactor 4 and the intelligent parameter adjustment system 2; the power supply 5 is electrically connected to the air switch 3, the contactor 4, the intelligent parameter adjustment system 2 and the display and control module 7, and the intelligent parameter adjustment system 2 is also connected to the oil pumping motor 6 arranged outside the shell 1, and the oil pumping motor 6 drives the oil pumping unit to operate.

[0023] Embodiment 2: Intelligent parameter adjustment device for oil pumping unit, the structure is as follows Figure 1 As shown, it includes a shell 1, an intelligent parameter adjustment system 2, an air switch 3 and a contactor 4 are arranged inside the shell 1, a power supply 5 is arranged outside the shell 1, and a display and control module 7 is also arranged on the outer panel of the shell 1; the power supply 5 is electrically connected to the air switch 3, the contactor 4 and the intelligent parameter adjustment system 2; the power supply 5 is electrically connected to the air switch 3, the contactor 4, the intelligent parameter adjustment system 2 and the display and control module 7, and the intelligent parameter adjustment system 2 is also connected to the oil pumping motor 6 arranged outside the shell 1, and the oil pumping motor 6 drives the oil pumping unit to operate. The architecture of the intelligent parameter adjustment system 2 is shown in FIG. Figure 2 As shown, the intelligent parameter adjustment system 2 includes a detection control unit 8 and a speed regulation drive unit 9; the detection control unit 8 includes an electrical parameter detection unit 10, a CPU calculation unit 11 and a drive control unit 12; the speed regulation drive unit 9 includes a rectifier unit 13 and an IGBT power driver 14.

[0024] Embodiment 3: Intelligent parameter adjustment device for oil pumping unit, the structure is as follows Figure 1 As shown, it includes a housing 1, an intelligent parameter adjustment system 2, an air switch 3 and a contactor 4 are arranged inside the housing 1, a power supply 5 is arranged outside the housing 1, and a display and control module 7 is also arranged on the outer panel of the housing 1; the power supply 5 is electrically connected to the air switch 3, the contactor 4 and the intelligent parameter adjustment system 2; the power supply 5 is electrically connected to the air switch 3, the contactor 4, the intelligent parameter adjustment system 2 and the display and control module 7, and the intelligent parameter adjustment system 2 is also connected to the oil pump motor 6 arranged outside the housing 1. The architecture of the intelligent parameter adjustment system 2 is as follows Figure 2 As shown, the intelligent parameter adjustment system 2 includes a detection control unit 8 and a speed adjustment drive unit 9; the detection control unit 8 includes an electric parameter detection unit 10, a CPU calculation unit 11 and a drive control unit 12; the speed adjustment drive unit 9 includes a rectifier unit 13 and an IGBT power driver 14. The circuit diagram of the intelligent parameter adjustment system 2 is shown in FIG. Figure 3As shown. The electric parameter detection unit 10 is used to receive the real-time electric parameter data of the pumping unit motor 6 fed back by the IGBT power driver 14 and optimize it, and transmit the optimized real-time electric parameter data to the CPU calculation unit 11 and the display and control module 7; the CPU calculation unit 11 is used to calculate the optimized real-time electric parameter data and transmit the calculation result to the driver control unit 12, and the driver control unit 12 is used to convert the calculation result of the CPU calculation unit 11 into an action instruction and send it to the IGBT power driver 14; the rectifier unit 13 is used to control the AC-DC conversion of the power supply 5; the IGBT power driver 14 is used to drive the pumping unit motor 6 to move; the display and control module 7 is used to display the real-time electric parameter data of the pumping unit motor 6.

[0025] Embodiment 4: Intelligent parameter adjustment device for oil pumping unit, the structure is as follows Figure 1 As shown, it includes a housing 1, an intelligent parameter adjustment system 2, an air switch 3 and a contactor 4 are arranged inside the housing 1, a power supply 5 is arranged outside the housing 1, and a display and control module 7 is also arranged on the outer panel of the housing 1; the power supply 5 is electrically connected to the air switch 3, the contactor 4 and the intelligent parameter adjustment system 2; the power supply 5 is electrically connected to the air switch 3, the contactor 4, the intelligent parameter adjustment system 2 and the display and control module 7, and the intelligent parameter adjustment system 2 is also connected to the oil pump motor 6 arranged outside the housing 1. The architecture of the intelligent parameter adjustment system 2 is as follows Figure 2 As shown, the intelligent parameter adjustment system 2 includes a detection control unit 8 and a speed adjustment drive unit 9; the detection control unit 8 includes an electric parameter detection unit 10, a CPU calculation unit 11 and a drive control unit 12; the speed adjustment drive unit 9 includes a rectifier unit 13 and an IGBT power driver 14. The circuit diagram of the intelligent parameter adjustment system 2 is shown in FIG. Figure 3 As shown. The electric parameter detection unit 10 is used to receive the real-time electric parameter data of the pumping unit motor 6 fed back by the IGBT power driver 14 and optimize it, and transmit the optimized real-time electric parameter data to the CPU calculation unit 11 and the display and control module 7; the CPU calculation unit 11 is used to calculate the optimized real-time electric parameter data and transmit the calculation result to the driver control unit 12, and the driver control unit 12 is used to convert the calculation result of the CPU calculation unit 11 into an action instruction and send it to the IGBT power driver 14; the rectifier unit 13 is used to control the AC-DC conversion of the power supply 5; the IGBT power driver 14 is used to drive the pumping unit motor 6 to move; the display and control module 7 is used to display the real-time electric parameter data of the pumping unit motor 6.

[0026] The real-time electrical parameter data includes the real-time strokes of the pumping unit motor 6 and the effective stroke of the pumping unit. The model of the electrical parameter detection unit 10 is: TX-ZNJC-CYJ-YL-01, the model of the CPU calculation unit 11 is: YF-ZNJS-CYJ-YL-02, the model of the driver control unit 12 is: TXYF-ZQ-002, the model of the rectifier unit 13 is: QL-380V 60A, the model of the IGBT power driver 14 is: FF450R12KT4, and the model of the display and control module 7 is: TXYF-XK-YL002.

[0027] Embodiment 5: The control method of the intelligent parameter adjustment device of the oil pumping unit is as follows: Figure 4 As shown, the specific steps are as follows: Step 1: Receive the real-time electrical parameter data of the pumping unit motor 6 fed back by the IGBT power driver 14 through the detection control unit 8 in the intelligent parameter adjustment system 2, optimize it through the filtering algorithm, and transmit the optimized real-time electrical parameter data to the CPU calculation unit 11 and the display and control module 7; The real-time electrical parameter data includes the real-time stroke frequency of the pumping unit motor 6 and the real-time effective stroke of the pumping unit.

[0028] Step 2, the CPU calculation unit 11 calculates the received real-time electrical parameter data and transmits the calculation result to the driver control unit 12; Step 3: The driver control unit 12 converts the calculation result of the CPU calculation unit 11 into an action instruction and sends it to the IGBT power driver 14; Step 4: The IGBT power driver 14 drives the oil pumping unit motor 6 to operate and adjust the rotation speed of the oil pumping unit motor 6.

[0029] Embodiment 6: The control method of the intelligent parameter adjustment device of the oil pumping unit has the following specific steps: Step 1: Receive the real-time electrical parameter data of the pumping unit motor 6 fed back by the IGBT power driver 14 through the detection control unit 8 in the intelligent parameter adjustment system 2, optimize it through the filtering algorithm, and transmit the optimized real-time electrical parameter data to the CPU calculation unit 11 and the display and control module 7; The real-time electrical parameter data includes the real-time stroke frequency of the pumping unit motor 6 and the real-time effective stroke of the pumping unit.

[0030] Step 2, the CPU calculation unit 11 calculates the received real-time electrical parameter data and transmits the calculation result to the driver control unit 12; The calculation process of real-time electrical parameter data is as follows: Step 2.1, according to the received IGBT power driver 14 feedback, the pumping motor 6 runs for 30 minutes and the effective stroke of the pumping unit, calculate the theoretical liquid production Q under each time state 理 , the maximum theoretical liquid production Q 理 As the standard liquid production Q 标准 ; Theoretical liquid production Q 理 The calculation process is as follows: , where D is the pump piston diameter, n is the average strokes during operation, the average stroke is the average of 4 real-time strokes, and S is the theoretical effective stroke of the piston, which is the standard liquid production Q 标准 The effective stroke of the state; Step 2.2: Collect the real-time stroke times and real-time effective strokes of the pumping unit motor 6 during operation, and calculate the actual liquid production of the oil well under the current state. ; Actual liquid production The calculation process is as follows: , where Ns is the real-time stroke of the pumping unit motor (6), Ap is the plunger cross-sectional area, Spe is the real-time effective stroke of the plunger, and ΔQp is the leakage per cycle.

[0031] Step 2.3: Compare the standard liquid production Q 标准 and the actual liquid production of the current state oil well , compared with the actual liquid production With standard liquid production Q 标准 and transmits the comparison result to the driver control unit 12.

[0032] Step 3: The driver control unit 12 converts the calculation result of the CPU calculation unit 11 into an action instruction and sends it to the IGBT power driver 14; Step 4: The IGBT power driver 14 drives the oil pumping unit motor 6 to operate and adjust the rotation speed of the oil pumping unit motor 6.

[0033] The specific process is as follows: If the actual liquid production Greater than standard liquid production Q 标准 , it means that the downhole fluid supply energy is increased, the effective stroke is increased, and the pumping needs to be accelerated, that is, the IGBT power driver 14 is instructed to drive the pumping unit motor 6 to increase the stroke frequency; when it runs to the theoretical effective stroke position, the stroke frequency at this position is maintained; if the actual fluid production Less than standard liquid production Q 标准 , it means that the downhole fluid supply energy is reduced and the effective stroke is reduced, and the pumping speed needs to be reduced, that is, the IGBT power driver 14 is instructed to drive the pumping unit motor 6 to reduce the stroke frequency, and when it runs to the theoretical effective stroke position, the stroke frequency of this position is maintained.

Claims

1. Intelligent parameter adjustment device for oil pumping unit, characterized in that: It comprises a housing (1), wherein an intelligent parameter adjustment system (2), an air switch (3) and a contactor (4) are arranged inside the housing (1), a power supply (5) is arranged outside the housing (1), and a display control module (7) is also arranged on the external panel of the housing (1); The power source (5) is electrically connected to the air switch (3), the contactor (4) and the intelligent parameter adjustment system (2); the power source (5) is electrically connected to the air switch (3), the contactor (4), the intelligent parameter adjustment system (2) and the display and control module (7); and the output end of the intelligent parameter adjustment system (2) is connected to a pumping unit motor (6) arranged outside the housing (1).

2. The intelligent parameter adjustment device for oil pumping unit according to claim 1 is characterized in that: The intelligent parameter adjustment system (2) comprises a detection control unit (8) and a speed adjustment drive unit (9); the detection control unit (8) comprises an electrical parameter detection unit (10), a CPU calculation unit (11) and a drive control unit (12); the speed adjustment drive unit (9) comprises a rectifier unit (13) and an IGBT power driver (14).

3. The intelligent parameter adjustment device for oil pumping unit according to claim 2 is characterized in that: The electric parameter detection unit (10) is used to receive the real-time electric parameter data of the oil pumping unit (6) fed back by the IGBT power driver (14) and optimize the data, and transmit the optimized real-time electric parameter data to the CPU calculation unit (11) and the display and control module (7); the CPU calculation unit (11) is used to calculate the optimized real-time electric parameter data and transmit the calculation result to the driver control unit (12); the driver control unit (12) is used to convert the calculation result of the CPU calculation unit (11) into an action instruction and issue it to the IGBT power driver (14); the rectifier unit (13) is used to control the AC / DC conversion of the power supply (5); the IGBT power driver (14) is used to drive the oil pumping unit (6) to operate and transmit the real-time electric parameter data of the oil pumping unit (6) to the electric parameter monitoring unit (10); and the display and control module (7) is used to display the real-time electric parameter data of the oil pumping unit (6).

4. The intelligent parameter adjustment device for oil pumping unit according to claim 3 is characterized in that: The real-time electrical parameter data includes the real-time stroke frequency of the oil pumping unit motor (6) and the real-time effective stroke of the oil pumping unit.

5. The intelligent parameter adjustment device for oil pumping unit according to claim 1 is characterized in that: The model of the electrical parameter detection unit (10) is TX-ZNJC-CYJ-YL-01, the model of the CPU calculation unit (11) is YF-ZNJS-CYJ-YL-02, the model of the driver control unit (12) is TXYF-ZQ-002, the model of the rectifier unit (13) is QL-380V 60A, the model of the IGBT power driver (14) is FF450R12KT4, and the model of the display and control module (3) is TXYF-XK-YL002.

6. A control method for an intelligent parameter adjustment device for an oil pumping unit, characterized in that: The specific steps are as follows: Step 1: receiving the real-time electrical parameter data of the pumping unit motor (6) fed back by the IGBT power driver (14) through the detection control unit (8) in the intelligent parameter adjustment system (2), optimizing the data through a filtering algorithm, and transmitting the optimized real-time electrical parameter data to the CPU calculation unit (11) and the display and control module (7); Step 2, the CPU calculation unit (11) calculates the received real-time electrical parameter data and transmits the calculation result to the driver control unit (12); Step 3: The calculation result of the CPU calculation unit (11) is converted into an action instruction by the driver control unit (12) and sent to the IGBT power driver (14); Step 4: The IGBT power driver (14) drives the oil pumping unit motor (6) to operate and adjust the rotation speed of the oil pumping unit motor (6).

7. The control method of the intelligent parameter adjustment device for oil pumping units according to claim 6 is characterized in that: The real-time electrical parameter data in step 1 include the real-time stroke frequency of the pumping unit motor (6) and the real-time effective stroke of the pumping unit.

8. The control method of the intelligent parameter adjustment device for oil pumping units according to claim 6 is characterized in that: The calculation process of the real-time electrical parameter data described in step 2 is as follows: Step 2.1: Calculate the theoretical liquid production Q at each time state based on the number of strokes of the pumping unit motor (6) running for 30 minutes and the effective stroke of the pumping unit fed back by the IGBT power driver (14). 理 , the maximum theoretical liquid production Q 理 As the standard liquid production Q 标准 ; Step 2.2: Collect the real-time stroke times and real-time effective strokes of the pumping unit motor (6) during operation, and calculate the actual liquid production of the oil well under the current state. ; Step 2.3: Compare the standard liquid production Q 标准 and the actual liquid production of the current state oil well , compared with the actual liquid production With standard liquid production Q 标准 and transmits the comparison result to the driver control unit (12).

9. The control method of the intelligent parameter adjustment device for oil pumping unit according to claim 9 is characterized in that: The theoretical liquid production Q 理 The calculation process is as follows: , where D is the pump piston diameter, n is the average strokes during operation, the average stroke is the average of 4 real-time strokes, and S is the theoretical effective stroke of the piston, which is the standard liquid production Q 标准 The effective stroke of the state; the actual liquid production The calculation process is as follows: , where Ns is the real-time stroke of the pumping unit motor (6), Ap is the plunger cross-sectional area, Spe is the real-time effective stroke of the plunger, and ΔQp is the leakage per cycle.

10. The control method of the intelligent parameter adjustment device for oil pumping unit according to claim 9, characterized in that: The specific process of step 4 is as follows: Greater than standard liquid production Q 标准 , it means that the downhole fluid supply energy is increased and the effective stroke is increased, and it is necessary to accelerate the extraction, and instruct the IGBT power driver (14) to drive the pumping unit motor (6) to increase the stroke frequency; when it runs to the theoretical effective stroke position, the stroke frequency at this position is maintained; if the actual fluid production Less than standard liquid production Q 标准 , it means that the downhole fluid supply energy is reduced and the effective stroke is reduced, and the extraction speed needs to be reduced, that is, the IGBT power driver (14) is instructed to drive the pumping unit motor (6) to reduce the stroke frequency, and when it runs to the theoretical effective stroke position, the stroke frequency at this position is maintained.

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