Device for monitoring data of underground electric submersible pump

Abstract

The invention discloses a device for monitoring data of an underground electric submersible pump, and relates to the technical field of power electronics. The underground parameter tester and the ground control box are used for collecting and managing underground data parameters, the depth, temperature, oil extraction state pressure, vibration, electric pump inclination conditions, voltage and current conditions near the underground electric submersible pump are collected respectively, and the well logging and well patrol workload can be reduced to the maximum extent; the underground real-time data can be analyzed to obtain whether the working position, the working state, the oil extraction working condition and the whole line of the underground electric submersible pump are normal or not, a clear and visual judgment basis is provided for a user, the electric submersible pump is protected, the service life of the electric submersible pump is prolonged, and the service life of a mine is prolonged.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, and more specifically to a device for monitoring data of a downhole submersible electric pump. Background Technology

[0002] A downhole submersible electric pump is a type of downhole lifting equipment used in oil and gas extraction. It uses an electric motor to drive a multi-stage centrifugal pump to lift well fluid (including crude oil) to the surface.

[0003] In oilfields, problems such as high temperatures and well blockages are often not detected or warned of in a timely manner. This affects the service life of the oil pump and the well's lifespan, and can also lead to a decrease in production after well shutdown. In severe cases, it may even endanger the safety of the entire mine. To address this, we propose a device for monitoring the data of downhole submersible electric pumps. Summary of the Invention

[0004] The purpose of this invention is to provide a device for monitoring downhole submersible electric pump data in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution: A device for monitoring data of a submersible electric pump (SAP) in a well includes: a surface system and a downhole system. The surface system includes an electrical structure, which comprises a surface control box, a surface high-pressure choke, and downhole sensors. The downhole system includes a condition monitoring instrument connected to the electrical structure via a signal. The condition monitoring instrument is used for monitoring and controlling the working status of the SSP well, providing users with real-time, accurate, and reliable SSP working parameters and well condition parameters.

[0006] Furthermore, the wellhead system includes: a drive module, a data parsing module, a data processing module, and a data storage module.

[0007] Furthermore, the downhole system includes: a drive module, a data acquisition module, a data encoding module, and a data transmission module.

[0008] Furthermore, the wellhead control box has a built-in data processing system, which includes a surface secondary instrument and a surface filtering unit. The surface secondary instrument consists of a main control circuit board and an MCGS touch screen, and the surface filtering unit consists of an LC low-pass filter composed of inductors and capacitors to effectively suppress the common-mode voltage generated in the submersible electric pump system.

[0009] Furthermore, the wellhead control box is equipped with an RS485 communication interface and an MCGS touchscreen.

[0010] Furthermore, the operating condition instrument is used to monitor the pressure at the inlet of the downhole electric pump, the inlet temperature, the vibration of the motor in the X and Y directions, the temperature of the motor oil, the well inclination, and the leakage current operating condition parameters.

[0011] The beneficial effects of this invention are as follows: This invention collects and manages downhole data parameters through a downhole parameter testing instrument and a surface control box. It collects data on the depth, temperature, production pressure, vibration, pump tilt, voltage, and current near the downhole submersible pump, thereby minimizing the workload of logging and well inspection.

[0012] This invention can analyze real-time downhole data to determine the location, operating status, oil production conditions, and overall circuit condition of the submersible electric pump, providing users with a clear and intuitive basis for judgment. This enables the protection of the submersible electric pump, extends its service life, and increases the service life of the mine. Attached Figure Description

[0013] Figure 1 This is a block diagram of the present invention; Figure 2 This is a working block diagram of the well surface control box in this invention; Figure 3 This is a flowchart of the process of the present invention.

[0014] Reference numerals: 10. Electrical structure; 11. Surface control box; 111. Surface secondary instrument; 112. Surface filter unit; 12. Surface high-pressure choke; 13. Downhole sensor; 20. Operating condition instrument. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0016] Please see Figure 1 - Figure 3 The present invention provides a device for monitoring data of a downhole submersible electric pump, comprising: an uphole system and a downhole system, wherein the uphole system includes an electrical structure 10, the electrical structure 10 includes an uphole control box 11, an uphole high-pressure choke 12 and a downhole sensor 13.

[0017] The surface control box 11 is used to analyze and process the data collected downhole; the surface high-voltage choke 12 is used to block high-frequency electromagnetic interference while allowing low-frequency signals to pass through, thereby ensuring the stability of the power system and the safe operation of the equipment; the downhole sensor 13 is used to collect real-time data downhole and upload it to the surface control box 11 in real time.

[0018] By setting up downhole sensor 13, the workload of logging and well inspection can be minimized, and oil and gas production and recovery rate can be increased with fewer wells. It also helps to determine the location of infill wells and design well construction, realize the automatic control function of surface equipment, optimize / adjust the oil production process in real time, realize real-time management of reservoir / well data, increase the recoverable reserves of oil and gas resources, and for cluster wells, control the production volume that does not pass through the formation, save production costs, minimize infrastructure and operating costs, restore the reservoir reserves and energy by controlling the flow characteristics of the oil layer, ensure wellbore stability, delay the invasion of formation water into the oil layer, and increase oil and gas production.

[0019] The downhole system includes a condition instrument 20 connected to the electrical structure 10 via a signal. The condition instrument 20 is used for monitoring and controlling the working status of the submersible electric pump well, providing users with real-time, accurate, and reliable submersible electric pump working parameters and well condition parameters.

[0020] Users can adjust the operating status of the submersible pump in a timely manner based on the monitored data to protect the pump, thereby extending its service life and ensuring reasonable oil extraction. The operating condition instrument 20 combines oil well production process theory with the practical application of submersible pumps to provide users with a variety of application options and functions.

[0021] The working condition instrument 20 can monitor real-time data downhole and has a data recording function. It can record and save the data measured in the last half month and refresh it continuously to form corresponding historical data recording curves and historical data reports, providing a basis for users to adjust oil well production. The operating condition instrument 20 has a limit value recording function. It records and saves the maximum and minimum values ​​of various monitoring parameters and their corresponding system times during the production operation of the oil well in the past half month. Through this data recording, users can clearly understand the extreme conditions that the submersible electric pump has experienced during operation. These data records can be saved as long as the operating condition instrument 20 is not powered off or the data records are not refreshed. This function can be used to test the production static pressure of the oil well. When the electric pump is stopped for 48 hours, the measured pressure can be used as the production static pressure at the pump inlet, providing a basis for users to set the production pressure differential. In addition, the operating condition instrument 20 can still work normally when the submersible electric motor is stopped. When the motor stops, the operating condition instrument 20 will automatically test the recovery pressure of the oil well and record the pressure recovery curve, which provides convenience for users to analyze oil well production and saves users the cost and time of pressure recovery testing. The working condition instrument 20 has automatic adjustment and control functions. The working condition instrument 20 has a preset automatic control adjustment function and has relay output and switch control interface. According to the user's actual field application, the working condition instrument 20 can be connected to the user's corresponding submersible electric pump ground control frequency converter system to adjust and control the frequency converter. When the production pressure difference is less than the allowable pressure difference (preset), the frequency converter is controlled to stop, realizing the automatic control of oil well production, thereby extending the service life of the motor and achieving the purpose of rational oil well exploitation. The working status instrument 20 has a fault alarm function. The working status instrument 20 reflects the working status of the submersible electric pump and the production status of the oil well in real time. If the monitored data exceeds the user's set value, such as the submersion degree being less than the set minimum submersion degree, the working status instrument 20 will generate an alarm signal and display the alarm reason. This function is a reserved function and can be added according to the user's needs. The working condition instrument 20 has a fault indication function. By observing the value of the working current in the human-machine interface of the working condition instrument 20, some fault types can be determined. For example, if the working current is very large, such as 130mA, it indicates that the downhole tester is short-circuited; if the working current is very small or non-existent, it indicates that the power supply to the downhole tester is broken.

[0022] With the cooperation of the surface and downhole systems, the operational status analysis and production performance optimization of submersible electric pump wells can be achieved: Based on real-time monitoring data from the downhole operation monitoring system, and integrating relevant data such as surface production, oil pressure, casing pressure, and gas-liquid ratio (including gas wells), the well's production and operation status can be grasped, and measures can be taken in real time to optimize well production, thereby reducing energy consumption for well production, improving unit lifespan, and ensuring reasonable well production; timely alarms and automatic shutdown protection are provided for sudden events occurring in the production of submersible electric pump wells. When downhole fluid supply decreases, the unit pump inlet pressure decreases, and the motor... Poor heat dissipation can lead to increased temperature. By monitoring pressure and temperature, the unit is automatically shut down when the pressure falls below the reasonable level or the motor temperature exceeds the set temperature. The unit is automatically restarted when the liquid level returns to a reasonable height. This ensures reasonable production while protecting the unit from burnout due to high temperatures. It also prevents the unit from operating in inefficient areas for extended periods, reducing power consumption per ton of liquid per 100 meters. Data from multiple wells is analyzed and integrated to provide a reliable basis for subsequent well and pump selection, avoiding issues such as "low-end configuration with high load" or "high-end configuration with low load" during the selection of oil production equipment.

[0023] In this embodiment, preferably, the wellhead system includes: a drive module, a data parsing module, a data processing module, and a data storage module; the drive module enables the start and stop of the data parsing module, the data processing module, and the data storage module; the data parsing module converts the current signal transmitted downhole into a voltage signal; the data processing module reads the data and performs filtering processing; and the data storage module stores the data.

[0024] In this embodiment, preferably, the downhole system includes: a drive module, a data acquisition module, a data encoding module, and a data transmission module; the drive module enables the start and stop of the data acquisition module, the data encoding module, and the data transmission module; the data acquisition module acquires raw signals of various downhole parameters; the data encoding module conditions the acquired raw signals; the conditioned voltage signal is transmitted in a time-division manner; the voltage signal is converted into a current signal; and the current signal is transmitted through the data transmission module in the form of a current loop.

[0025] In this embodiment, preferably, the wellhead control box 11 has a built-in data processing system, which includes a surface secondary instrument 111 and a surface filtering unit 112. The surface secondary instrument 111 consists of a main control circuit board and an MCGS touch screen. The main control circuit board can be divided into three parts according to its function: a long-distance power supply part, a parameter signal sampling part, and an ARM7 control and data processing part. The current-to-voltage conversion circuit of the surface secondary instrument 111 is designed to realize the surface extraction of the current loop transmission signal. The surface filtering unit 112 consists of an LC low-pass filter composed of an inductor and a capacitor to effectively suppress the common-mode voltage generated in the submersible electric pump system.

[0026] In this embodiment, preferably, the well-mounted control box 11 has a built-in RS485 communication interface and an MCGS touch screen; human-machine interaction is realized through the RS485 communication interface and the MCGS touch screen.

[0027] In this embodiment, preferably, the operating condition instrument 20 is used to monitor the pressure at the inlet of the downhole electric pump, the inlet temperature, the vibration of the motor in the X and Y directions, the temperature of the motor oil, the well inclination, and the leakage current operating parameters. Through the analysis of the above data, the operating position of the downhole submersible electric pump, whether its working status is normal, whether the oil production condition is normal, and whether the overall circuit is normal can be obtained, providing users with a clear and intuitive basis for judgment, thereby protecting the submersible electric pump, extending its service life, and increasing the service life of the mine.

[0028] Working principle and usage process of this invention: The voltage provided by the surface secondary instrument 111 is adjusted to the voltage that the downhole devices can operate at. The raw signals of various parameters in the downhole are collected by the downhole sensor 13. The collected raw signals are conditioned and the conditioned voltage signals are transmitted in a time-division manner. The voltage signals are converted into current signals and transmitted to the surface control box 11 in the form of a current loop. The data of the downhole equipment is collected by the sensor and transmitted to the surface signal control box for signal processing. The working status of the downhole is obtained by analyzing the data. The surface control box 11 converts the current signal transmitted downhole into a voltage signal, samples the signal through an external AD chip, communicates with the AD chip using the core chip NXP2368, reads the data, filters it through the surface filtering unit 112, transmits data to the MCGS touch screen through the RS485 communication interface, displays the data, and completes the human-machine interaction function. The working condition instrument 20 monitors system faults and takes corresponding actions, provides downhole positive and negative pressure power to the downhole system in a time-division manner, and completes the leakage current measurement. Based on users' needs to understand the operating parameters of submersible electric pumps (SAPs) and well condition parameters, downhole parameter testing instruments and surface control boxes are used to collect and manage downhole data parameters. These include the depth near the SSP, temperature, oil production pressure, vibration, pump tilt, voltage, and current. Analysis of this data reveals the SSP's operating location, whether its operating status is normal, whether the oil production conditions are normal, and whether the overall circuitry is functioning correctly. This provides users with a clear and intuitive basis for judgment, enabling the protection of the SSP, extending its service life, and ultimately increasing the lifespan of the mine. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for monitoring data of an electric submersible oil pump, characterized in that, The application relates to a system for monitoring and controlling the working state of an electric submersible pump, comprising an uphole system and a downhole system, wherein the uphole system comprises an electrical structure (10) which comprises an uphole control box (11), an uphole high-voltage choke (12) and a downhole sensor (13); the downhole system comprises a working condition instrument (20) which is connected with the electrical structure (10) through signals, and the working condition instrument (20) is applied to monitoring and controlling the working state of an electric submersible pump, and provides real-time, accurate and reliable working parameters and well condition parameters of the electric submersible pump for users. The uphole system comprises a driving module, a data analysis module, a data processing module and a data saving module.

2. A device for monitoring data of a submersible electric pump for oil wells according to claim 1, characterized in that, The downhole system comprises a driving module, a data acquisition module, a data coding module and a data sending module.

3. The apparatus for data monitoring of a submersible electric pump for oil wells according to claim 1, characterized in that, The uphole control box (11) is internally provided with a data processing system, the data processing system comprises a ground secondary instrument (111) and a ground filter unit (112), wherein the ground secondary instrument (111) is composed of a main control circuit board and an MCGS touch screen, the ground filter unit (112) is composed of an inductor and a capacitor to form an LC low-pass filter, and the LC low-pass filter can effectively suppress common-mode voltage generated in the electric submersible pump system.

4. The apparatus for data monitoring of a submersible electric pump for oil wells according to claim 1, characterized in that: The uphole control box (11) is internally provided with an RS485 communication interface and an MCGS touch screen.

5. The apparatus for data monitoring of a submersible electric pump for oil wells according to claim 1, characterized in that: The working condition instrument (20) is used for monitoring pressure, inlet temperature, vibration of an electric motor in X and Y directions, temperature of motor oil, well inclination and leakage current working condition parameters at an inlet of the downhole electric pump.

6. The apparatus for data monitoring of a submersible electric pump for oil wells according to claim 1, characterized in that: ​

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