Device and method for balance adjustment of non-stop pumping unit

Abstract

The invention provides a non-stop oil pumping unit balance adjusting device and method, the device comprises an oil pumping unit double-dead-point acquisition switch, a PLC controller, a frequency converter, an upper computer and an oil pumping unit, the oil pumping unit double-dead-point acquisition switch acquires uplink and downlink operation dead point states of the oil pumping unit, the PLC controller wirelessly transmits dead point state signals to the upper computer, and the frequency converter is connected with the upper computer. The upper computer assigns values to uplink and downlink frequencies according to the balance rate condition of an oil well, the frequency converter executes the uplink and downlink differential frequencies, transmitted by the PLC, of the oil well, and the oil pumping unit carries out oil gas lifting under the control of the uplink and downlink differential frequencies of the frequency converter, so that the overall balance of uplink and downlink power is guaranteed. According to the invention, the safety risks of hoisting operation, climbing operation and the like in the balance adjustment process are eliminated, the physical labor intensity of field operators is reduced, and the balance rate adjustment operation of the rod-pumped well on line can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield development, and in particular to a device and method for balancing and adjusting an oil pump without shutting down the machine. Background Art

[0002] Balancing and adjusting the oil well pumping units is a routine task in oil production management. The higher the pumping unit operating balance rate, the smoother the equipment runs and the lower the energy consumption of the pumping unit motor.

[0003] The existing technology for adjusting the oil well balance rate requires stopping the well. According to the underbalanced or overbalanced situation of the pumping unit, the balance block of the pumping unit is increased or decreased to make the motor running electric power values ​​close to each other when the oil well is going up and down, so as to achieve the power balance of the pumping unit and achieve the purpose of stable equipment operation and reduced operating energy consumption.

[0004] The existing technology has the following disadvantages: 1. Under normal circumstances, the balance adjustment of the oil well requires the addition or subtraction or adjustment of the balance block of the oil well after the pumping unit is stopped, which affects the time rate of the oil well; 2. In the process of conventional balance adjustment of the oil well, the balance block needs to be added or subtracted manually, which has a high labor intensity for employees, and the employees need to carry heavy loads and climb to operate, which poses a great safety hazard; 3. For some operating oil pumping equipment, due to the limitations of well depth and ground equipment model, there is a phenomenon that the oil pump counterweight box is still underbalanced after being filled with balance blocks or is still overbalanced after the counterweight box is emptied, which affects the stable performance of the equipment operation.

[0005] In the Chinese patent application with application number: CN201310184886.5, a control device and control method for adjusting the balance cursor of an oil pumping unit are involved. In order to overcome the shortcomings of the traditional balance adjustment of oil pumping units, the invention includes a cursor execution control assembly and a ground collection and analysis control assembly. The cursor execution control assembly uses solar energy storage as a power source, and uses wireless communication to control the connection with the ground collection and analysis control assembly; the ground collection and analysis control assembly collects and analyzes the balance parameters of the oil pumping unit, and sends instructions to the cursor execution control assembly to control the movement of the balance cursor to adjust the balance of the oil pumping unit, as well as its corresponding control method. Its beneficial effect is that no external power supply is required, which solves the safety hazards and cable life problems, and increases the balance adjustment range of the oil pumping unit, while improving the automation of the system. This technology is only applicable to walking beam oil pumping units, and cannot meet the requirements of belt-type oil pumping unit balance adjustment. In addition, the power source of the balance control cursor is solar energy, and there is insufficient power source when adjusting the balance rate on rainy days and at night, and it does not have a broad spectrum.

[0006] In the Chinese patent application with application number: CN201721668837.9, a beam pumping control system is involved, which belongs to the field of oil production equipment. Its technical solution is: including PLC, the power input end of PLC is connected to the power module, the digital input end of PLC is connected to the switch button and the proximity switch, the proximity switch is used to measure the top dead center position of the pumping unit, that is, the vertical downward position of the crank of the main engine of the pumping unit, and the digital output of PLC is connected to the relay group through the relay contact control circuit. The beneficial effects of the utility model are: it has the functions of balance adjustment and speed adjustment at the same time, and has high integration. It is compatible with DC power supply and AC power supply system, and the system parameters are adjusted according to the load when DC power supply is used, and the system parameters are adjusted according to the load or electrical parameters when AC power supply is used. This technology is only applicable to beam pumping units, and does not describe the adaptability of belt pumping units. And when adjusting the balance rate, since the upward stroke and downward stroke of the pumping unit are not defined, the balance rate is adjusted only by speed change to increase or decrease the speed of the upward and downward synchronously, and the frequency amplitude of the adjustment is limited.

[0007] In the Chinese patent application with application number: CN201911028115.0, a method for energy-saving control of dynamic adjustment of pumping unit balance combined with multi-stage voltage regulation is involved. The technology combining real-time dynamic adjustment of balance with multi-stage voltage regulation is adopted, and the specific implementation method is: first, by installing a dynamic adjustment balancing device, and according to the parameters such as the structural size and operation cycle of the pumping unit, the real-time adjustment of the balancing torque is realized, and the peak power of the pumping unit motor operation is effectively reduced while completing the online adjustment of the balance degree; secondly, according to the working condition after the pumping unit balance adjustment, on the basis of obtaining the operating power and identifying the maximum power, the duration of the heavy-load operation interval is determined, and the minimum limit value of the motor voltage regulation level is calculated based on this; finally, according to the multiple voltage regulation levels realized by combining the multi-speed double-winding transformer with the motor star and delta connection, the voltage level that meets the limit requirements and the minimum motor loss is selected as the final control voltage regulation level, so as to maximize the efficiency of the motor and the power supply line. This technology requires a major modification of the oil pump (installation of a dynamic adjustment balancing device), and the method of changing the balancing torque is only suitable for oil-volume oil pumps, and is not suitable for belt-type oil pump chain box transmission and counterweight box balancing modes.

[0008] In the Chinese patent application with application number: CN201910687068.4, a method and control device for adjusting the balance of a beam pumping unit auxiliary counterweight are involved. The method includes: obtaining the first operating parameter of the beam pumping unit; drawing a net torque curve and a load torque curve with the crank angle as the horizontal coordinate and the torque as the vertical coordinate according to the first operating parameter, determining the crank angle, net torque value and load torque value corresponding to the zero point and inflection point on the net torque curve; determining the zero points and inflection points adjacent to each other on the net torque curve as an adjustment cycle; determining the moving direction, moving distance and crank rotation time of the beam auxiliary counterweight in each adjustment cycle according to the crank angle, the load torque corresponding to the crank angle and the net torque in the first operating parameter; and adjusting the position of the beam auxiliary counterweight at a uniform speed according to the moving direction, moving distance and crank rotation time of the beam auxiliary counterweight in each adjustment cycle in turn. This application can improve the balance state of the beam pumping unit.

[0009] The above existing technologies are all application technologies related to walking beam oil pumps, which are quite different from the present invention and fail to solve the technical problems we want to solve. Therefore, we have invented a new device and method for balancing and adjusting oil pumps without stopping. Summary of the invention

[0010] The purpose of the present invention is to provide a device and method for balancing oil wells without stopping the wells for balancing rate adjustment, which solves the problem that the wells need to be shut down for balancing adjustment and provides a device and method for balancing oil wells without stopping the wells for balancing rate adjustment.

[0011] The object of the present invention can be achieved through the following technical measures: a device for balancing and adjusting an oil pumping unit without stopping, the device for balancing and adjusting an oil pumping unit without stopping comprises a double dead point acquisition switch for the oil pumping unit, a PLC controller, a frequency converter, a host computer and an oil pumping unit, the double dead point acquisition switch for the oil pumping unit is installed on the oil pumping unit, collects the upward and downward operating dead point states of the oil pumping unit, and transmits the dead point state signal to the PLC controller, the PLC controller is connected to the double dead point acquisition switch for the oil pumping unit and the frequency converter, wirelessly transmits the dead point state signal to the host computer, the host computer assigns values ​​to the upward and downward frequencies respectively according to the balance rate of the oil well, and transmits the differentiated frequencies of the upward and downward operations of the oil well to the PLC controller, the frequency converter executes the differentiated frequencies of the upward and downward operations of the oil well transmitted by the PLC controller, the oil pumping unit is connected to the frequency converter, and under the control of the differentiated upward and downward frequencies of the frequency converter, oil and gas lifting is performed to ensure the overall balance of the upward and downward powers.

[0012] The purpose of the present invention can also be achieved by the following technical measures:

[0013] The double dead point acquisition switch of the oil pump is installed at the upper dead point and the lower dead point of the operation of the oil pump, so as to separate the upward and downward states of the oil well and feed back to the PLC controller.

[0014] The device and method for balancing and adjusting the oil pump without stopping also include a smart meter, which collects parameters such as the upstream power, downstream power, upstream current, downstream current, periodic power consumption, and oil well power balance rate when the oil pump is running.

[0015] The upper computer calculates the oil well balance rate using the following formula:

[0016] Oil well power balance rate = downstream power / upstream power × 100%.

[0017] When the oil well balance rate calculated by the host computer is in the range of 60%-160%, it indicates that the oil well balance rate meets the standard and production is normal.

[0018] The oil well balance rate calculated by the host computer exceeds 60%-160%, indicating that the oil well balance rate needs to be adjusted.

[0019] If the oil well balance rate is less than 60%, it means that the oil well is underbalanced. The host computer adjusts its production frequency. Under the condition that the existing operating stroke frequency remains unchanged, the oil well upward frequency is gradually reduced relative to the current oil well operating frequency. The oil well downward frequency automatically generates a corresponding frequency based on the unchanged oil well stroke frequency. At this time, the downward frequency becomes larger relative to the original frequency.

[0020] If the oil well balance rate is greater than 160%, it means that the oil well is in an over-balanced state. The host computer adjusts its production frequency. Under the condition that the existing operating stroke rate remains unchanged, the oil well upward frequency is gradually increased relative to the current oil well operating frequency. The oil well downward frequency automatically generates a corresponding frequency based on the unchanged oil well stroke rate. At this time, the downward frequency becomes smaller relative to the original frequency.

[0021] The object of the present invention can also be achieved by the following technical measures: a method for balancing and adjusting a pumping unit without stopping the pumping unit, the method for balancing and adjusting a pumping unit without stopping the pumping unit adopts a device for balancing and adjusting a pumping unit without stopping the pumping unit, comprising:

[0022] Step 1, the host computer calculates the balance rate of the oil well;

[0023] Step 2, determining whether the balance rate of the oil well exceeds the range;

[0024] Step 3: When the oil well balance rate is too small, the upper computer gradually reduces the oil well upward frequency relative to the current oil well operating frequency, and the oil well downward frequency automatically generates a corresponding frequency according to the oil well stroke frequency. At this time, the downward frequency becomes larger relative to the original frequency;

[0025] Step 4, when the oil well balance rate is too large, the host computer gradually increases the oil well upward frequency relative to the current oil well operating frequency, and the oil well downward frequency automatically generates a corresponding frequency based on the unchanged oil well stroke frequency. At this time, the downward frequency becomes smaller relative to the original frequency.

[0026] In step 1, the upper computer calculates the oil well balance rate using the formula:

[0027] Oil well power balance rate = downstream power / upstream power × 100%.

[0028] In step 2, the oil well balance rate is in the range of 60%-160%, indicating that the oil well balance rate meets the standard and production is normal.

[0029] In step 3, the host computer sends the adjustment frequency instruction to the frequency converter through the PLC controller. The frequency converter collects the upward and downward strokes defined by the double dead point switch of the pumping unit, so that the pumping unit executes the differentiated frequencies of the upper and lower strokes respectively.

[0030] In step 3, after the oil pump operates according to the differentiated upstream and downstream frequencies, the corresponding upstream power of the oil pump becomes smaller and the downstream power becomes larger. The smart meter collects the corresponding upstream and downstream powers, transmits them to the host computer through the PLC controller, and recalculates and displays the adjusted power balance rate. Through multiple rounds of differentiated balance rate assignment and adjustment on the host computer, the upstream and downstream powers are brought close to each other to achieve oil well balance.

[0031] In step 4, the host computer sends the adjustment frequency instruction to the frequency converter through the PLC controller. The frequency converter collects the upward and downward strokes defined by the double dead point switch of the pumping unit, so that the pumping unit executes the differentiated frequencies of the upper and lower strokes respectively.

[0032] In step 3, after the oil pump operates according to the differentiated upstream and downstream frequencies, the corresponding upstream power of the oil pump becomes larger and the downstream power becomes smaller. The smart meter collects the corresponding upstream and downstream powers, transmits them to the host computer through the PLC controller, and recalculates and displays the adjusted power balance rate. Through multiple rounds of differentiated balance rate assignment and adjustment on the host computer, the upstream and downstream powers are brought close to each other to achieve oil well balance.

[0033] The method for balancing and adjusting the oil pump without stopping also includes, after step 4, continuously tracking the oil well balance rate online, and if the oil well balance rate exceeds the required range, looping steps 1-4 to make the oil well balance rate reach the standard.

[0034] The device and method for balancing and adjusting the oil pump without stopping in the present invention realizes the technical idea of ​​reducing the ratio of the up and down power values ​​of the oil pump motor by differentially setting the up and down running speeds of the oil pump, and realizing online adjustment of the balance rate of the oil well. The differentiated up and down running frequencies proposed in the present invention have a larger adjustment range of the balance rate, which can better meet the actual needs of production. The present invention effectively solves the problem of stopping the well for balancing and adjusting the oil well of the oil pump, eliminates the safety risks such as hoisting and climbing operations during the balancing and adjusting process, reduces the physical labor intensity of on-site operators, and can realize online adjustment operations of the balance rate of the oil well. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of a specific embodiment of the device and method for balancing and adjusting the oil pumping unit without stopping the unit according to the present invention;

[0036] Figure 2 It is a power curve diagram of the BAE118-X58 well operating at a stroke rate of 1.93min-1 in a specific embodiment of the present invention;

[0037] Figure 3 The power curve diagram of the BAE118-X58 well operating at a stroke rate of 1.62 min-1 in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0038] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations and / or combinations thereof.

[0040] In oil well production, different operating frequencies correspond to different pumping unit bare rod operation strokes and different pumping unit motor powers. In the conventional oil well balance rate collection and calculation process, a completed stroke is divided into two stages: upward and downward. The balance rate of the pumping unit is the ratio of the downward power of the pumping unit motor to the upward power of the pumping unit.

[0041] However, for the same oil well with a pumping unit, under the same working conditions, the oil well production parameters (stroke times) are different, and the corresponding motor up and down powers will change significantly, mainly manifested as: when the oil well production frequency increases, the up power and down power of the underbalanced oil well of the pumping unit increase, but affected by the friction between the pumping rod column and the liquid column in the wellbore, the increase in the up power is greater than the increase in the down power, and the underbalance of the oil well is aggravated. Therefore, the present invention realizes the reduction of the numerical ratio of the up and down power of the pumping unit motor and realizes the technical idea of ​​online adjustment of the oil well balance rate by differentially setting the up and down running speeds of the pumping unit.

[0042] To verify the above viewpoints, the power curves of the same continuously producing oil well under different production strokes were retrieved, and the power values ​​of the downward power and upward power curves under different strokes were reorganized and calculated and analyzed to verify the feasibility of adjusting the balance rate of the oil well by the differentiated upward and downward frequencies of the pumping unit.

[0043] Depend on Figure 2 The analysis shows that the BAE118-X58 has 1.93 uplink and downlink times: the average power balance rate is 30.8%;

[0044] Depend on Figure 3 The analysis shows that the BAE118-X58 has 1.62 uplink and downlink times: the average power balance rate is 30.7%;

[0045] Through Figure 2 and Figure 3 The uplink power curves are combined, with 1.93 uplink times and 1.62 downlink times (1.775 times on average): the average power balance rate is 25.3%; 1.62 uplink times and 1.93 downlink times (1.775 times on average): the average power balance rate is 37%;

[0046] From the data analysis and comparison, we can see that: BAE118-X58 goes up 1.62 times and goes down 1.93 times (average 1.775 times): the power balance rate is 37% on average; compared with the oil well balance rate when both the up and down are 1.93 times and 1.62 times, it is increased by nearly 6%. Comprehensive analysis shows that for underbalanced oil wells, the balance rate can be improved by running the pumping unit bare rod up and down with different frequencies, fast down and slow up. For oil wells that are still underbalanced due to insufficient fluid supply and equipment limitations after the oil well balance block is filled, the oil well balance rate can be adjusted by differentiating the up and down frequencies.

[0047] The device for balancing and adjusting an oil pump without stopping the oil pump of the present invention comprises a double dead point acquisition switch of the oil pump, an intelligent electric meter, a PLC controller, a frequency converter, a host computer configuration, and an oil pump.

[0048] The double dead point switch is installed on the oil pump, and the signal collected by the double dead point switch is transmitted to the PLC controller through the line; the PLC controller is connected to the frequency converter and the smart meter line; the host computer is wirelessly connected to the PLC controller.

[0049] Double dead point acquisition switch for oil pumping unit: A dead point switch is installed at the upper dead point and the lower dead point of the oil pumping unit. The dead point switch is used to collect the upward and downward operating dead point status of the oil pumping unit. The upward and downward status of the oil well can be accurately separated and fed back to the PLC controller.

[0050] Smart meter: collects parameters such as upstream power, downstream power, upstream current, downstream current, cycle power consumption, and oil well power balance rate when the pump is running.

[0051] PLC controller: PLC receives the moving switch signal of the upper and lower dead point switches, processes it through the single-chip signal, and then sends the processed information to the frequency converter through 485 communication. At the same time, PLC receives the real-time operating frequency when the frequency converter returns.

[0052] Host computer: A computer that sends work instructions to the PLC controller. It is used to assign values ​​to the uplink and downlink frequencies according to the balance rate of the oil well, and remotely adjust the balance rate. The host computer calculates the balance rate of the oil well. The formula is:

[0053] Oil well power balance rate = downlink power / uplink power × 100%

[0054] The smart meter collects the upstream power and downstream power, upstream current and downstream current during the operation of the oil well. The upstream power and downstream power are used to calculate the oil well power method balance rate; the upstream current and downstream current are used to calculate the oil well current method balance rate. In actual operation, the power method balance rate is generally selected as the standard for the oil well balance rate.

[0055] Frequency converter: executes the differentiated frequencies of the oil well's upward and downward movements issued by the PLC controller, and achieves the differentiation of the upward and downward movement impulses of the oil well through differentiated frequencies, which is reflected in the upward and downward power of the oil well, making the two tend to be equal.

[0056] Pumping unit: Under the control of the up and down differentiated frequencies of the inverter, oil and gas are lifted while ensuring the overall balance of up and down power.

[0057] Implementation method:

[0058] 1. Personnel track the balance rate of production wells on the remote control terminal.

[0059] 2. If the remote control terminal shows that the oil well balance rate is between 60% and 160%, it means that the oil well balance rate meets the standard and production is normal;

[0060] If the remote control terminal displays that the oil well balance rate exceeds 60%-160%, it means that the oil well balance rate needs to be adjusted.

[0061] 3. If the oil well balance rate is less than 60%, it means that the oil well is underbalanced. Its production frequency can be adjusted on the remote terminal. Under the condition that the existing operating strokes remain unchanged, the oil well upward frequency is gradually reduced relative to the current oil well operating frequency, and the oil well downward frequency automatically generates the corresponding frequency according to the oil well strokes (the downward frequency becomes larger relative to the original frequency). The remote terminal sends the adjusted frequency instruction to the inverter through the PLC. The inverter defines the upward and downward strokes by installing double dead point switches, so that the pumping unit executes the differentiated frequencies of the upper and lower strokes respectively. After the pumping unit operates according to the differentiated frequencies of the upper and lower strokes, the corresponding upward power of the pumping unit becomes smaller and the downward power becomes larger. The smart meter collects the corresponding upward and downward power, transmits it to the remote terminal through the PLC, and recalculates and displays the adjusted power balance rate. Through multiple rounds of differentiated balance rate assignment adjustment on the remote terminal, the upward and downward powers are close to each other, and the oil well balance is achieved between 60% and 160%.

[0062] 4. If the oil well balance rate is greater than 160%, it means that the oil well is in an overbalanced state. Its production frequency can be adjusted on the remote terminal. Under the condition that the existing operating strokes remain unchanged, the oil well upward frequency is gradually increased relative to the current oil well operating frequency, and the oil well downward frequency automatically generates a corresponding frequency according to the oil well strokes remain unchanged (the downward frequency becomes smaller relative to the original frequency). The remote terminal sends the adjusted frequency instruction to the inverter through the PLC. The inverter defines the upward and downward strokes by installing a double dead point switch, so that the pumping unit executes the differentiated frequencies of the upper and lower strokes respectively. After the pumping unit operates according to the differentiated frequencies of the upper and lower strokes, the corresponding upward power of the pumping unit becomes larger and the downward power becomes smaller. The smart meter collects the corresponding upward and downward power, transmits it to the remote terminal through the PLC, and recalculates and displays the adjusted power balance rate. Through multiple rounds of differentiated balance rate assignment adjustment on the remote terminal, the upward and downward powers are close to each other, and the oil well balance is achieved between 60% and 160%.

[0063] 5. After the adjustment is completed, continue to track the oil well balance rate online. If the oil well balance rate exceeds the required range of 60%-160%, repeat this operation to make the oil well balance rate meet the standard.

[0064] The following are several specific embodiments of the present invention.

[0065] Example 1

[0066] In a specific embodiment 1 of the present invention, taking the BAE118X58 well as an example, the well was previously produced at 22Hz for both uplink and downlink frequencies, with 1.2 strokes and a balance rate of 52%. Afterwards, through the uplink and downlink differential frequency balance adjustment: the uplink frequency was 17Hz, the downlink frequency was 28.6Hz, with 1.2 strokes, and the balance rate reached 97.1%. The balance rate met the standard.

[0067] Example 2

[0068] In the specific embodiment 2 of the present invention, taking the B3-12 well as an example, the well was previously produced at 25Hz for both uplink and downlink frequencies, with one stroke and a balance rate of 48.6%. Afterwards, through the uplink and downlink differentiated frequency balance adjustment: the uplink frequency was 18Hz, the downlink frequency was 40.9Hz, with one stroke, and the balance rate reached 101%. The balance rate met the standard.

[0069] Example 3

[0070] In the specific embodiment 3 of the present invention, taking the B3-20 well as an example, the well was previously produced at 32.5Hz for both uplink and downlink frequencies, with 1.3 strokes and a balance rate of 192%. Afterwards, through the uplink and downlink differentiated frequency balance adjustment: the uplink frequency was 41Hz, the downlink frequency was 26.9Hz, with 1.3 strokes, and the balance rate reached 104%. The balance rate met the standard.

[0071] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0072] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

Claims

1. A device for balancing and adjusting an oil pump without stopping the pump, characterized in that: The device for balancing and adjusting the oil pumping unit without stopping comprises a double dead point acquisition switch for the oil pumping unit, a PLC controller, a frequency converter, a host computer and an oil pumping unit. The double dead point acquisition switch for the oil pumping unit is installed on the oil pumping unit to acquire the upward and downward operating dead point states of the oil pumping unit and transmit the dead point state signal to the PLC controller. The PLC controller is connected to the double dead point acquisition switch for the oil pumping unit and the frequency converter to wirelessly transmit the dead point state signal to the host computer. The host computer assigns values ​​to the upward and downward frequencies respectively according to the balance rate of the oil well, and transmits the differentiated upward and downward frequencies of the oil well to the PLC controller. The frequency converter executes the differentiated upward and downward frequencies of the oil well transmitted by the PLC controller. The oil pumping unit is connected to the frequency converter to perform oil and gas lifting under the control of the differentiated upward and downward frequencies of the frequency converter to ensure the overall balance of the upward and downward power.

2. The device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 1, characterized in that: The double dead point acquisition switch of the oil pump is installed at the upper dead point and the lower dead point of the operation of the oil pump, so as to separate the upward and downward states of the oil well and feed back to the PLC controller.

3. The device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 1, characterized in that: The device and method for balancing and adjusting the oil pump without stopping also include a smart meter, which collects parameters such as the upstream power, downstream power, upstream current, downstream current, periodic power consumption, and oil well power balance rate when the oil pump is running.

4. The device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 3, characterized in that: The upper computer calculates the oil well balance rate using the following formula: Oil well power balance rate = downstream power / upstream power × 100%.

5. The device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 4, characterized in that: When the oil well balance rate calculated by the host computer is in the range of 60%-160%, it indicates that the oil well balance rate meets the standard and production is normal.

6. The device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 4, characterized in that: The oil well balance rate calculated by the host computer exceeds 60%-160%, indicating that the oil well balance rate needs to be adjusted.

7. The device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 6, characterized in that: If the oil well balance rate is less than 60%, it means that the oil well is underbalanced. The host computer adjusts its production frequency. Under the condition that the existing operating stroke frequency remains unchanged, the oil well upward frequency is gradually reduced relative to the current oil well operating frequency. The oil well downward frequency automatically generates a corresponding frequency based on the unchanged oil well stroke frequency. At this time, the downward frequency becomes larger relative to the original frequency.

8. The device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 6, characterized in that: If the oil well balance rate is greater than 160%, it means that the oil well is in an over-balanced state. The host computer adjusts its production frequency. Under the condition that the existing operating stroke rate remains unchanged, the oil well upward frequency is gradually increased relative to the current oil well operating frequency. The oil well downward frequency automatically generates a corresponding frequency based on the unchanged oil well stroke rate. At this time, the downward frequency becomes smaller relative to the original frequency.

9. A method for balancing and adjusting an oil pump without stopping the pump, characterized in that: The method for balancing and adjusting the oil pumping unit without stopping the unit adopts the device for balancing and adjusting the oil pumping unit without stopping the unit according to claim 1, comprising: Step 1, the host computer calculates the balance rate of the oil well; Step 2, determining whether the balance rate of the oil well exceeds the range; Step 3: When the oil well balance rate is too small, the upper computer gradually reduces the oil well upward frequency relative to the current oil well operating frequency, and the oil well downward frequency automatically generates a corresponding frequency according to the oil well stroke frequency. At this time, the downward frequency becomes larger relative to the original frequency; Step 4, when the oil well balance rate is too large, the host computer gradually increases the oil well upward frequency relative to the current oil well operating frequency, and the oil well downward frequency automatically generates a corresponding frequency based on the unchanged oil well stroke frequency. At this time, the downward frequency becomes smaller relative to the original frequency.

10. The method for balancing and adjusting an oil pump without stopping the pump according to claim 9, characterized in that: In step 1, the upper computer calculates the oil well balance rate using the formula: Oil well balance rate = downlink power / uplink power × 100%.

11. The method for balancing and adjusting an oil pumping unit without stopping the unit according to claim 9, characterized in that: In step 2, the oil well balance rate is in the range of 60%-160%, indicating that the oil well balance rate meets the standard and production is normal.

12. The method for balancing and adjusting an oil pump without stopping the pump according to claim 9, characterized in that: In step 3, the host computer sends the adjustment frequency instruction to the frequency converter through the PLC controller. The frequency converter collects the upward and downward strokes defined by the double dead point switch of the pumping unit, so that the pumping unit executes the differentiated frequencies of the upper and lower strokes respectively.

13. The method for balancing and adjusting an oil pumping unit without stopping the unit according to claim 12, characterized in that: In step 3, after the oil pump operates according to the differentiated upstream and downstream frequencies, the corresponding upstream power of the oil pump becomes smaller and the downstream power becomes larger. The smart meter collects the corresponding upstream and downstream powers, transmits them to the host computer through the PLC controller, and recalculates and displays the adjusted power balance rate. Through multiple rounds of differentiated balance rate assignment and adjustment on the host computer, the upstream and downstream powers are brought close to each other to achieve oil well balance.

14. The method for balancing and adjusting an oil pumping unit without shutting down the unit according to claim 9, characterized in that: In step 4, the host computer sends the adjustment frequency instruction to the frequency converter through the PLC controller. The frequency converter collects the upward and downward strokes defined by the double dead point switch of the pumping unit, so that the pumping unit executes the differentiated frequencies of the upper and lower strokes respectively.

15. The method for balancing and adjusting an oil pumping unit without stopping the unit according to claim 14, characterized in that: In step 3, after the oil pump operates according to the differentiated upstream and downstream frequencies, the corresponding upstream power of the oil pump becomes larger and the downstream power becomes smaller. The smart meter collects the corresponding upstream and downstream powers, transmits them to the host computer through the PLC controller, and recalculates and displays the adjusted power balance rate. Through multiple rounds of differentiated balance rate assignment and adjustment on the host computer, the upstream and downstream powers are brought close to each other to achieve oil well balance.

16. The method for balancing and adjusting an oil pumping unit without stopping the unit according to claim 9, characterized in that: The method for balancing and adjusting the oil pump without stopping also includes, after step 4, continuously tracking the oil well balance rate online, and if the oil well balance rate exceeds the required range, looping steps 1-4 to make the oil well balance rate reach the standard.

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