Intelligent controller of oil pumping unit

Abstract

The utility model discloses an intelligent controller for an oil pumping unit, which relates to the field of oil pumping units, and comprises an input terminal which is electrically connected with a terminal unit, a calculation module, a control box and a control panel in sequence, and the control box is electrically connected with the terminal unit; the terminal unit, the calculation module and the control box are electrically connected to form a loop, the motor is inching at certain intervals when pumping is stopped so as to reduce the influence caused by temperature change in an oil well when pumping is stopped, and data collected by field equipment in the oil well is transmitted to the terminal unit from the input terminal. The terminal unit transmits collected data to the calculation module, the calculation module transmits the data to the control box, and the duration of intermittent pumping starting and stopping and the frequency of the inching motor during pumping stopping can be set in a mode of being matched with the data by manually operating the control panel on site. And the influence on the device and the production efficiency caused by changes generated in an oil well when pumping of the device is stopped is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pumping units, and particularly to an intelligent controller for a pumping unit. Background Art

[0002] At present, most oil production enterprises use the intermittent pumping of pumping units without stopping to replace the continuous operation mode, which can effectively reduce energy consumption. The intermittent pumping control system without stopping has been widely applied to the oilfield site. However, during the period of pumping stop, there is no flow of crude oil, operation of equipment and change of ambient temperature in the oil well, and the temperature in the oil well will change, which will further cause the change of pressure in the oil well and wax deposition phenomenon. This phenomenon will affect the pumping efficiency. Content of the Utility Model

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the utility model provides an intelligent controller for a pumping unit, which jogs the motor at a certain interval during the pumping stop to reduce the influence brought by the temperature change in the oil well during the pumping stop. The analog signals collected by the on-site equipment in the oil well are transmitted to the input terminals. The analog signals specifically include parameters such as current, voltage, wellhead temperature, and pressure. The terminal unit receives the analog signals transmitted by the input terminals and converts them into digital signals, and then converts the digital signals into data. The terminal unit transmits the data to the calculation module. The calculation module processes the received data. The calculation module transmits the processed data to the control box. The on-site manual operation control panel can set the duration of intermittent pumping start and stop and the frequency of motor jogging during the pumping stop to match the data, so as to reduce the influence of the changes in the oil well during the pumping stop on the device and production efficiency.

[0004] The utility model provides an intelligent controller for a pumping unit, including a pumping motor, input terminals for receiving the analog signals collected by the on-site equipment in the oil well, a terminal unit for receiving the analog signals transmitted by the input terminals and converting them into digital signals, and then converting the digital signals into data, a calculation module for processing the data transmitted by the terminal unit, a control box for receiving the data transmitted by the calculation module and outputting an electrical signal for operating the pumping motor, a control panel for displaying the data received by the control box, inputting the operation instruction for the pumping motor and transmitting it back to the control box, and output terminals for controlling the pumping motor according to the electrical signal of the pumping motor. The input terminals are electrically connected to the terminal unit, the calculation module, the control box and the control panel in sequence. The control box is electrically connected to the terminal unit. The terminal unit, the calculation module and the control box are electrically connected to form a loop.

[0005] Optionally, a contactor and a soft starter are sequentially connected between the terminal unit and the output terminals.

[0006] Optionally, the terminal unit is further configured to receive the electrical signal of the operation instruction for the pumping motor sent back by the control box, and control the on-off of the contactor and the parameter setting of the soft starter.

[0007] Optionally, the terminal unit is an industrial-grade remote terminal unit of model ZHC492C, and the calculation module is a digital signal processor of the TMS320C2000, TMS320F2800 or TMS320C6000 series.

[0008] Optionally, an electricity meter is connected to the control box.

[0009] Optionally, a circuit breaker, a lightning arrester and a control power switch are sequentially connected between the input terminal and the terminal unit.

[0010] Optionally, a motor protector and a current transformer are sequentially connected between the soft starter and the output terminal.

[0011] Optionally, the control panel includes a data display screen and a duration setting screen.

[0012] The technical solution provided by the embodiment of the present utility model has the following advantages compared with the prior art: when the pumping stops, the motor is jogged at regular intervals to reduce the influence caused by the temperature change in the oil well during pumping stop. The analog signals collected by the on-site equipment in the oil well are transmitted to the input terminal. The analog signals specifically include parameters such as current, voltage, wellhead temperature, and pressure. The terminal unit receives the analog signals transmitted by the input terminal and converts them into digital signals, and then converts the digital signals into data. The terminal unit transmits the data to the calculation module, and the calculation module processes the received data. The calculation module transmits the processed data to the control box. The duration of starting and stopping the intermittent pumping and the frequency of jogging the motor during pumping stop can be set to match the data through manual operation of the control panel on-site, reducing the influence of the changes generated in the oil well during pumping stop on the device and the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments that conform to the present utility model, and are used together with the specification to explain the principles of the present utility model.

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a structural block diagram of an intelligent controller for a pumping unit of the present utility model;

[0016] Figure 2 Block diagram of the intelligent controller of the pumping unit according to another embodiment of the present utility model;

[0017] Figure 3 is Figure 1 Schematic diagram of the structure of the duration setting screen on the control panel shown in

[0018] Description of the reference numerals

[0019] 1. Input terminal; 2. Terminal unit; 3. Calculation module; 4. Control box; 5. Control panel; 6. Contactor; 7. Soft starter; 8. Output terminal 9. Circuit breaker; 10. Lightning arrester; 11. Control power switch; 12. Motor protector; 13. Current transformer; 14. Watt-hour meter. Specific implementation manners

[0020] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the solution of the present utility model will be further described below. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Embodiment 1:

[0023] Combined with Figure 1 The intelligent controller of the pumping unit provided by the embodiment of the present utility model shown in includes an input terminal 1 for receiving analog signals collected by on-site equipment in the oil well, a terminal unit 2 for receiving the analog signals transmitted by the input terminal 1 and converting them into digital signals, and then converting the digital signals into data, a calculation module 3 for processing the data transmitted by the terminal unit 2, a control box 4 for receiving the data transmitted by the calculation module 3 and outputting an electrical signal for operating instructions for the pumping motor, a control panel 5 for displaying the data received by the control box 4, inputting the operating instructions for the pumping motor and transmitting them back to the control box 4, an output terminal 8 for transmitting the electrical signal for controlling the pumping motor to the pumping motor, the input terminal 1 is electrically connected to the terminal unit 2, the calculation module 3, the control box 4 and the control panel 5 in sequence, the control box 4 is electrically connected to the terminal unit 2, and the terminal unit 2, the calculation module 3 and the control box 4 are electrically connected to form a loop.

[0024] Thus, the analog signals collected by the on-site equipment in the oil well are transmitted to the input terminal 1. The analog signals specifically include parameters such as current, voltage, wellhead temperature, and pressure. The terminal unit 2 receives the analog signals transmitted by the input terminal 1, converts them into digital signals, and then converts the digital signals into data. The terminal unit 2 transmits the data to the calculation module 3. The calculation module 3 processes the received data, and the calculation module transmits the processed data to the control box 4. The control box 4 is used to receive the data transmitted by the calculation module 3 and output an electrical signal for the operation instruction of the pumping motor. The electrical signal for controlling the pumping motor is transmitted to the pumping motor through the output terminal 8. The on-site manual operation control panel 5 can set the duration of the intermittent pumping start and stop and the frequency of the motor jogging during the pumping stop to match the data. After the set parameters are transmitted back to the terminal unit 2, the terminal unit 2 precisely controls the contactor 6 and the soft starter 7, so as to perform intermittent pumping under the best intermittent pumping system and perform spot pumping at the best spot pumping frequency of the pumping motor during the pumping stop, reducing the impact of the changes in the oil well during the pumping stop on the device and the production efficiency.

[0025] Specifically, a contactor 6 and a soft starter 7 are sequentially connected between the terminal unit 2 and the output terminal 8. The contactor 6 is used to control the on and off of the circuit, and the soft starter 7 is used to control the starting process of the motor. During the starting process, the voltage and current of the pumping motor can be gradually increased to reduce the impact on the power grid and the mechanical stress of the motor. The terminal unit 2 is also used to receive the electrical signal for the operation instruction of the pumping motor transmitted back by the control box 4 and control the on and off of the contactor 6 and the parameter setting of the soft starter 7.

[0026] Specifically, the terminal unit 2 can be an industrial-grade remote terminal unit of model ZHC492C, etc., and the calculation module 3 can be a digital signal processor of series such as TMS320C2000, TMS320F2800, or TMS320C6000, which is not limited here.

[0027] Embodiment 2:

[0028] Combined with Figures 2 to 3As shown in the figure, the intelligent controller for pumping units provided in this embodiment includes an input terminal 1 for receiving analog signals collected by on-site equipment in the oil well, a terminal unit 2 for receiving the analog signals transmitted by the input terminal 1, converting them into digital signals, and then converting the digital signals into data. A calculation module 3 is used to process the data transmitted by the terminal unit 2. A control box 4 is used to receive the data transmitted by the calculation module 3 and output an electrical signal for the operation instruction of the pumping motor. A control panel 5 is used to display the data received by the control box 4, input the operation instruction for the pumping motor, and transmit it back to the control box 4. An output terminal 8 is used to transmit the electrical signal for controlling the pumping motor to the pumping motor. The input terminal 1 is electrically connected to the terminal unit 2, the calculation module 3, the control box 4, and the control panel 5 in sequence. The control box 4 is electrically connected to the terminal unit 2, and the terminal unit 2, the calculation module 3, and the control box 4 are electrically connected to form a loop.

[0029] In this embodiment, a contactor 6 and a soft starter 7 are sequentially connected between the terminal unit 2 and the output terminal 8. The contactor 6 is used to control the on-off of the circuit, and the soft starter 7 is used to control the starting process of the motor. During the starting process, the voltage and current of the pumping motor can be gradually increased to reduce the impact on the power grid and the mechanical stress of the motor. The terminal unit 2 is also used to receive the electrical signal for the operation instruction of the pumping motor transmitted back by the control box 4, and control the on-off of the contactor 6 and the parameter setting of the soft starter 7.

[0030] The terminal unit 2 can be an industrial-grade remote terminal unit of model ZHC492C, etc. The calculation module 3 can be a digital signal processor of series such as TMS320C2000, TMS320F2800, or TMS320C6000, etc., which is not limited here.

[0031] The control box 4 is connected to an electricity meter 14. The electricity meter 14 is used to measure and record the consumption of electrical energy in the power system. At the same time, the control box 4 also obtains electrical energy data from the electricity meter 14 for operations such as energy efficiency analysis, fault diagnosis, and operation optimization. A circuit breaker 9, a lightning arrester 10, and a control power switch 11 are sequentially connected between the input terminal 1 and the terminal unit 2. When connected to the main circuit, in case of faults such as overload, short circuit, and grounding in the circuit, the circuit breaker 9 can quickly cut off the circuit to protect electrical equipment and personal safety. Since the working environment of oil pumping is mostly outdoor operation, when lightning strikes electrical equipment or transmission lines, the lightning arrester 10 can lead the lightning high voltage to the ground, thereby protecting the equipment and the circuit from damage. A motor protector 12 and a current transformer 13 are sequentially connected between the soft starter 7 and the output terminal 8. The main function of the motor protector 12 is to provide comprehensive protection and control for the motor. When abnormal conditions such as short circuit, overvoltage, undervoltage, leakage, or aging occur in the motor, the motor protector 12 can give an alarm or provide protection and control. The current transformer 13 can also provide insulation protection for the operator to avoid being injured by high voltage. The control panel 5 includes a data display screen and a duration setting screen. The calculation module 3 transmits the processed data to the control box 4. The data transmitted to the control box 4 is displayed on the data display screen. The data display screen and the duration setting screen are electrically connected. The read key on the duration setting screen can be touched to automatically read the data and adjust the corresponding duration. Or relevant staff in the field can also set the interval and duration of the intermittent pumping start and stop of the motor and the interval and duration of the point - start of the motor during shutdown according to the displayed data.

[0032] Thus, the analog signals collected by the on - site equipment in the oil well are transmitted to the input terminal 1. The analog signals specifically include parameters such as current, voltage, wellhead temperature, and pressure. The terminal unit 2 receives the analog signals transmitted from the input terminal 1, converts them into digital signals, and then converts the digital signals into data. The terminal unit 2 transmits the data to the calculation module 3. The calculation module 3 processes the received data. The calculation module transmits the processed data to the control box 4. The control box 4 is used to receive the data transmitted by the calculation module 3 and output an electrical signal for the operation instruction of the oil - pumping motor. The electrical signal for controlling the oil - pumping motor is transmitted to the oil - pumping motor through the output terminal 8. The duration of the intermittent pumping start and stop and the frequency of the point - start of the motor during shutdown can be set to match the data by manually operating the control panel 5 on - site. After the set parameters are transmitted back to the terminal unit 2, the terminal unit 2 precisely controls the contactor 6 and the soft starter 7, so as to achieve intermittent pumping under the best intermittent pumping system and point - start the oil - pumping motor at the best point - start frequency during shutdown, reducing the impact of the changes in the oil well on the device and production efficiency during shutdown.

[0033] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments described herein, but rather will conform to the broadest scope consistent with the principles and novel features of the present utility model described herein.

Claims

1. An intelligent controller for an oil pumping unit, comprising an oil pumping motor, characterized in that: An input terminal (1) for receiving an analog signal collected by a field device in an oil well; The terminal unit (2) is used to receive the analog signal transmitted by the input terminal (1) and convert it into a digital signal, and then convert the digital signal into data; A computing module (3) for processing data transmitted by the terminal unit (2); A control box (4) is used to receive data transmitted by the calculation module (3) and output an electrical signal for operating instructions to the oil pumping motor; A control panel (5) for displaying data received by the control box (4), inputting operating instructions for the oil pumping motor and transmitting them back to the control box (4); An output terminal (8) is used to control the oil pumping motor according to the electrical signal of the oil pumping motor; The input terminal (1) is electrically connected to the terminal unit (2), the computing module (3), the control box (4) and the control panel (5) in sequence; The control box (4) is electrically connected to the terminal unit (2); The terminal unit (2), the computing module (3) and the control box (4) are electrically connected to form a loop.

2. The intelligent controller for oil pumping unit according to claim 1, characterized in that: A contactor (6) and a soft starter (7) are connected in sequence between the terminal unit (2) and the output terminal (8).

3. The intelligent controller for oil pumping unit according to claim 1, characterized in that: The terminal unit (2) is also used to receive the electrical signal of the pumping motor operation instruction transmitted back by the control box (4), and control the on and off of the contactor (6) and the parameter setting of the soft starter (7).

4. The intelligent controller for oil pumping unit according to claim 1, characterized in that: The terminal unit (2) is an industrial-grade remote terminal unit of the ZHC492C model, and the computing module (3) is a digital signal processor of the TMS320C2000, TMS320F2800 or TMS320C6000 series.

5. The intelligent controller for oil pumping unit according to claim 1, characterized in that: The control box (4) is connected to an electricity meter (14).

6. The intelligent controller for oil pumping unit according to claim 1, characterized in that: A circuit breaker (9), a lightning arrester (10) and a control power switch (11) are sequentially connected between the input terminal (1) and the terminal unit (2).

7. The intelligent controller for oil pumping unit according to claim 2, characterized in that: A motor protector (12) and a current transformer (13) are sequentially connected between the soft starter (7) and the output terminal (8).

8. The intelligent controller for oil pumping unit according to any one of claims 1 to 7, characterized in that: The control panel (5) comprises a data display screen and a duration setting screen.

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