CN113239564B - Intelligent early warning automatic intervention system for oil well mouth parameters - Google Patents

Intelligent early warning automatic intervention system for oil well mouth parameters Download PDF

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CN113239564B
CN113239564B CN202110576190.1A CN202110576190A CN113239564B CN 113239564 B CN113239564 B CN 113239564B CN 202110576190 A CN202110576190 A CN 202110576190A CN 113239564 B CN113239564 B CN 113239564B
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dilution
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CN113239564A (en
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王鲁钰
穆怀浩
訾东风
郜俊红
高启铭
狄蒙蒙
刘义博
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Zhengzhou Zhihuitong Measurement Control Technology Co ltd
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Abstract

The invention relates to an intelligent early warning automatic intervention system for oil well mouth parameters, which comprises a current acquisition module, a well temperature acquisition module, an oil pressure acquisition module, a casing pressure acquisition module, a control module and a flow automatic control instrument arranged on a dilution pipeline, wherein the current acquisition module is connected with the control module; the current acquisition module is used for acquiring current data of the pumping unit motor; the well temperature acquisition module is used for acquiring oil return temperature data when the oil well is subjected to dilution regulation; the oil pressure acquisition module is used for acquiring oil pipe oil pressure data, and the casing pressure acquisition module is used for acquiring casing pressure data; the control module can receive motor current data, oil return temperature data, oil pressure data and casing pressure data of the oil pumping unit so as to generate a target dilution amount and send the target dilution amount to the flow automatic controller; the flow automatic controller is used for automatically controlling the flow of the diluent oil according to the target diluent amount; the system can automatically adjust the dilution accompanying amount in real time according to the well condition parameters of the oil well mouth, optimizes the dilution amount in time, does not need manual intervention, and realizes intelligent dilution.

Description

Intelligent early warning automatic intervention system for oil well mouth parameters
Technical Field
The invention belongs to the technical field of automatic regulation and control of an oil field dilution pipe network, and particularly relates to an intelligent early warning automatic intervention system for oil well mouth parameters.
Background
Oil field dilution is one of important means for supplementing energy to stratum, improving fluidity and improving oil field recovery ratio in the oil field development process. Because the viscosity of the thick oil is very high, the thick oil has very large resistance in the flowing process, the thick oil is not easy to be pumped out from an oil well, and the thin oil is injected into the underground through high pressure, so that the purpose of diluting the thick oil can be achieved, and the oil pumping effect is ensured. The dilution amount of a traditional oil well is regulated and controlled by manually regulating the opening degree of a wellhead dilution valve on a single dilution pipeline, along with the continuous deepening of oil field development, an encryption well and peripheral wells are deployed more and more, especially, remote block oil wells are distributed scattered (wellhead dilution tracing and the like), inconvenience is brought to daily routing inspection and parameter adjustment, the strength is high, the oil well dilution is easy to be stable due to slight delay, and the oil well is abnormal.
At present, a part of oil fields use a high-pressure flow automatic controller to regulate and control the dilution amount, the device is designed for integrating flow measurement and control, the device is structurally divided into a flowmeter, a flow regulation mechanism and a controller (flow control and data communication), the controller collects various signals of the flowmeter, the signals are analyzed and compared with preset values, if the signals collected from the flowmeter deviate from the preset values, the controller sends correct regulation instructions to an execution mechanism (flow regulation mechanism), and the execution mechanism regulates the opening degree of a valve, so that the high-pressure flow automatic controller reaches the preset values, and the closed-loop automatic regulation flow control is realized. However, the set value of the high-pressure flow automatic control instrument still depends on manual adjustment, but the well head of a remote well needs to be subjected to field adjustment of the set value by a well patrol worker during parameter adjustment, so that the timeliness is poor, and the abnormity of the oil well is easily caused by slight delay. Therefore, it is desirable to provide a parameter adjusting system that does not depend on manual parameter adjustment and can perform self-adjustment by intelligently identifying parameters.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an intelligent early warning automatic intervention system for parameters of an oil well head.
The technical scheme of the invention is as follows:
an intelligent early warning automatic intervention system for oil well mouth parameters comprises a current acquisition module, a well temperature acquisition module, an oil pressure acquisition module, a casing pressure acquisition module, a control module and a flow automatic control instrument arranged on a dilution pipeline;
the current acquisition module is used for acquiring current data of the pumping unit motor;
the well temperature acquisition module is used for acquiring oil return temperature data when the oil well is subjected to dilution regulation;
the oil pressure acquisition module is used for acquiring oil pipe oil pressure data, and the casing pressure acquisition module is used for acquiring casing pressure data;
the control module can receive motor current data, oil return temperature data, oil pressure data and casing pressure data of the oil pumping unit so as to generate a target dilution amount and send the target dilution amount to the flow automatic controller;
the flow automatic controller is used for automatically controlling the dilution flow according to the target dilution amount.
Further, the control module comprises a first module adopting a first control mode, a second module adopting a second control mode and a switching module for switching the control modes among all the modules;
the first module generates a target dilution amount according to current data of a motor of the oil pumping unit, the second module generates the target dilution amount according to oil return temperature data, oil pressure data and casing pressure data, and the switching module determines that the control module is in a first control mode or a second control mode according to a received user instruction.
Further, the first module is configured to generate the target dilution amount according to the following steps:
obtaining the average value of the amount of the adulteration for the first 5 days and the average value of the current of the pumping unit motor for the first 5 days, and respectively defining the values as' y 5 And ` I ` 5
Defining current oil pumping machine motor current data as I, and establishing the following adulteration quantity model:
target dilution amount y =' y 5 +a
Wherein a is the adjustment amount, y,' y 5 The units of a and a are: the volume of the mixture is cubic meter per hour,
in (I- "I 5 )/`I 5 A is-0.3 under the condition that the content is less than or equal to-20 percent,
at-20% < (I- "I) 5 )/`I 5 A is-0.2 under the condition that the content is less than or equal to-15 percent,
at-15% < (I- "I) 5 )/`I 5 A is-0.1 under the condition that the content is less than or equal to-10 percent,
at-10% <(I-`I 5 )/`I 5 A is 0 under the condition that the content is less than or equal to 10 percent,
at 10% < (I- "I) 5 )/`I 5 Under the condition that the content is less than or equal to 15 percent, a is 0.2,
at 15% < (I- "I) 5 )/`I 5 A is 0.3 under the condition that the content is less than or equal to 20 percent,
in (I- "I 5 )/`I 5 In the case of > 20%, a is 0.5.
Further, the adjustment interval of the dilution flow control is 30 seconds to 900 seconds.
Further, the automatic intervention system of oil well mouth parameter intelligence early warning still includes beam-pumping unit regulator cubicle and the PLC cabinet that is used for controlling the beam-pumping unit, control module sets up in the PLC cabinet, the current acquisition module is the current transformer who sets up in the beam-pumping unit regulator cubicle, still be provided with wireless data transmission module in the beam-pumping unit regulator cubicle, current transformer passes back the PLC cabinet through data transmission module after acquireing beam-pumping unit motor current, supplies control module to use for output target amount of dilution.
Furthermore, the intelligent early warning automatic intervention system for the parameters of the oil well head also comprises a cloud service and alarm module, wherein the current pumping unit motor current data I exceeds or is lower than the current average value 'I' of the pumping unit motor in the previous 5 days 5 And sending an alarm signal to the server and the controller to remind inspection personnel of coming to carry out field inspection at the current wellhead.
Further, the second module is configured to generate the target dilution amount according to the following steps:
obtaining the current adulteration quantity and recording the current adulteration quantity y 0 Calculating the difference value of the oil pressure data and the casing pressure data to obtain a pressure difference delta p, and establishing the following adulteration quantity model:
in the case of a decrease in well temperature, (Δ p-0.5 MPa)/0.5 MPa > -6% target dilution y = y 0 -0.1;
Under the condition that the well temperature is reduced, the target dilution amount is less than-6 percent in the proportion of (delta p-0.5 MPa)/0.5 MPa
y=y 0 +0.1;
If the range is exceeded, alarming and informing the patrol shift to process;
wherein the unit of delta p is MPa, and the current dilution y 0 And the dilution y is in units of cubic meters per hour.
The touch control device comprises a touch control screen, wherein the switching module is arranged in the touch control screen, and the touch control screen is also internally provided with a storage module, a chart module and a virtual key capable of being displayed on the touch control screen;
the storage module stores all oil pumping machine current data, oil return temperature data, oil pressure data, casing pressure data and real-time dilution flow data within a certain time, the real-time dilution flow data is sent by a flow automatic controller, and the diluted crude oil flow is collected by a flow meter in a metering and transferring station; the icon module is used for calling related data according to a set time range and a set time interval and displaying a change curve or a table of the current, the oil return temperature, the oil pressure data, the casing pressure data and the real-time dilution flow along with time of the oil pumping unit on the touch screen; the virtual key is used for receiving touch from a user to enable the control module to select a first control mode or a second control mode and to set various parameters.
Compared with the prior art, the invention has the beneficial effects that:
the system can automatically adjust the dilution accompanying amount in real time according to the well condition parameters of the oil well mouth, does not need manual intervention, optimizes the dilution amount in time, realizes intelligent dilution, realizes the optimal dilution amount under various conditions, reduces the cost of thin oil and improves the economic benefit; the well can not be killed; the system has short adjustment interval time and rapid adjustment of the dilution amount, ensures the normal transportation of the crude oil, can reduce the inspection frequency of inspection personnel and reduce the labor intensity; the system can meet the intelligent parameter adjustment under different states, can automatically adjust the dilution amount in real time according to the current change of the motor of the oil pumping unit, and can also automatically adjust the dilution amount in real time according to the change of well temperature, oil pressure and casing pressure.
Drawings
FIG. 1 is a graphical representation of wellhead flow parameter data in accordance with the present invention.
Fig. 2 is a schematic position diagram of the current acquisition module.
In the figure, TA is a current transformer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
An intelligent early-warning automatic intervention system for oil well mouth parameters comprises a current acquisition module, a well temperature acquisition module, an oil pressure acquisition module, a casing pressure acquisition module, a control module and a flow automatic control instrument arranged on a dilution doping pipeline;
the current acquisition module is used for acquiring current data of the pumping unit motor;
the well temperature acquisition module is used for acquiring oil return temperature data when the oil well is subjected to dilution regulation;
the oil pressure acquisition module is used for acquiring oil pipe oil pressure data, and the casing pressure acquisition module is used for acquiring casing pressure data;
the control module can receive motor current data, oil return temperature data, oil pressure data and casing pressure data of the oil pumping unit so as to generate a target dilution amount and send the target dilution amount to the flow automatic controller;
the flow automatic controller is used for automatically controlling the dilution flow according to the target dilution amount.
Furthermore, the intelligent early warning automatic intervention system for the parameters of the oil well head also comprises a rear flow meter for measuring the flow of the mixture discharged by the oil well after being diluted.
Further, the control module comprises a first module adopting a first control mode, a second module adopting a second control mode and a switching module for switching the control modes among all the modules;
the first module generates a target dilution amount according to the current data of the motor of the pumping unit, the magnitude of the motor current reflects the change of the motor acting, and the change of the motor acting is a direct expression of the working condition change of the oil well, so that the first module is suitable for flow control of the pumping unit well and can intelligently adjust the dilution amount according to the change of the motor current; the second module is suitable for flow control of the flowing well, intelligent adjustment of the dilution amount can be implemented according to well temperature, oil pressure and casing pressure changes, the second module generates a target dilution amount according to oil return temperature data, oil pressure data and casing pressure data, the switching module determines that the control module is in a first control mode or a second control mode according to received user instructions, and a user can select the corresponding control mode according to well conditions of an oil well.
Further, the first module is configured to generate the target dilution amount according to the following steps:
obtaining the average value of the amount of the adulteration for the first 5 days and the average value of the current of the pumping unit motor for the first 5 days, and respectively defining the values as' y 5 And ` I ` 5
Defining current oil pumping machine motor current data as I, and establishing the following adulteration quantity model:
target dilution amount y =' y 5 +a
Wherein a is the adjustment amount, y,' y 5 The units for a and a are: the volume of the mixture is cubic meter per hour,
in (I- "I 5 )/`I 5 A is-0.3 under the condition that the content is less than or equal to-20 percent,
at-20% < (I- "I) 5 )/`I 5 A is-0.2 under the condition that the content is less than or equal to-15 percent,
at-15% < (I- "I) 5 )/`I 5 A is-0.1 under the condition of less than or equal to-10 percent,
at-10% < (I- "I) 5 )/`I 5 A is 0 under the condition that the content is less than or equal to 10 percent,
at 10% < (I- "I) 5 )/`I 5 Under the condition that the content is less than or equal to 15 percent, a is 0.2,
at 15% < (I- "I) 5 )/`I 5 A is 0.3 under the condition that the content is less than or equal to 20 percent,
in (I- "I 5 )/`I 5 In the case of > 20%, a is 0.5.
Furthermore, the adjustment of the control of the diluted oil flow is adjusted in real time according to the parameters.
Further, as shown in fig. 2, the oil well head parameter intelligent early warning automatic intervention system further comprises an oil pumping machine electrical cabinet and a PLC cabinet, wherein the oil pumping machine electrical cabinet and the PLC cabinet are used for controlling the oil pumping machine, the control module is arranged in the PLC cabinet, the current acquisition module is a current transformer TA arranged in the oil pumping machine electrical cabinet, a wireless data transmission module is further arranged in the oil pumping machine electrical cabinet, the current transformer TA acquires the current of the oil pumping machine motor, the motor current is converted into a 4-20mA signal, and then the signal is wirelessly transmitted back to the PLC cabinet through the data transmission module E820, so that the control module can output a target dilution amount.
The first control mode exemplifies:
the normal current of the pumping unit of a well is known to be 60A, and the dilution flow is known to be 2m 3 H, i.e.' I 5 =60A、`y 5 =2m 3 /h。
When the current of the pumping unit is 80A, (I' I) 5 )/`I 5 If the ratio of (80-60)/60% = (33% > 20% and a is 0.5, the target doping amount y =' y 5 +a=2+0.5=2.5m 3 H, the wellhead flow control device automatically adjusts the flow rate to be 2.5m 3 H; the highest adulteration amount is adjusted to be 3m < 3 >/h;
when the current of the pumping unit is 50A, (I' I) 5 )/`I 5 If the ratio of (50-60)/60 is less than or equal to-16% and less than or equal to-15%, and a is equal to-0.2, the target dilution amount y is not less than 5 +a=2-0.2=1.8m 3 H, the wellhead flow control device automatically adjusts the flow rate to be 1.8m 3 /h。
Further, the second module is configured to generate the target dilution amount according to the following steps:
obtaining the current adulteration quantity and recording the current adulteration quantity y 0 Calculating the difference value of the oil pressure data and the casing pressure data to obtain a pressure difference delta p, and establishing the following adulteration quantity model:
in the case of a decrease in well temperature, (Δ p-0.5 MPa)/0.5 MPa > -6% target dilution y = y 0 -0.1;
Under the condition that the well temperature is reduced, the target dilution amount is less than-6 percent in the proportion of (delta p-0.5 MPa)/0.5 MPa
y=y 0 +0.1;
If the range is exceeded, alarming and informing the patrol shift to process;
wherein the unit of delta p is MPa, and the current dilution y 0 And the dilution y is in units of cubic meters per hour.
The second control mode exemplifies:
the normal dilution flow of a well is known to be 2m 3 H, normal differential pressure 2MPa, assuming y in the following calculation 0 =2m 3 H, but actually the current dilution y 0 Is a real-time change, so y will be calculated in the following calculation 0 At a normal dilution of 2m 3 The notation/h is for illustration only:
when the pressure difference is 0.3MPa, -40% ≦ (0.3-0.5) 0.5MPa less than-6%, the target dilution y = y 0 +0.1=2+0.1=2.1m 3 H; if the pressure difference still does not rise within a certain time, such as 600 seconds, the device automatically adjusts the dilution flow to 2.2m 3 Adjusting every 600 seconds for a while until the pressure difference is stabilized at a normal value of 2.0MPa; the maximum dilution is adjusted to 3m 3 /h;
When the differential pressure is 3.0MPa, (3 MPa-0.5 MPa)/0.5 MPa > -6%, the target dilution y = y 0 -0.1=2-0.1=1.9m 3 H, if the pressure difference is not reduced within a certain period of time, such as 600 seconds, the device is adjusted once every 600 seconds, and the minimum dilution amount is 1m 3 H until the differential pressure is stabilized at a normal value.
Further, as shown in fig. 1, the oil well head parameter intelligent early warning automatic intervention system further comprises a touch screen, the switching module is arranged in the touch screen, and the touch screen is also internally provided with a storage module, a chart module and a virtual key capable of being displayed on the touch screen; a certain time T is stored in the storage module 3 All the oil pumping machines in the oil pumping machine comprise current data, oil return temperature data, oil pressure data, casing pressure data, real-time dilution flow data and diluted crude oil flow data, wherein the real-time dilution flow is accompanied flow of diluted oil, and the real-time dilution flow is sent by a flow meter or a flow automatic controller additionally arranged on a dilution pipeline; the icon module is used for calling related data according to the set time range and time interval and displaying the current, the oil return temperature, the oil pressure data and the sleeve pressure number of the oil pumping unit on the touch screenAccording to a change curve or a table of the real-time diluting flow along with time, the virtual key is used for receiving touch from a user to enable the control module to select a first control mode or a second control mode and set various parameters; as shown in fig. 1, fig. 1 is a graph obtained when the system is tested internally, fig. 1 shows a graph with the vertical axis representing the changes of the current, the oil temperature, the dilution amount and the oil pressure casing pressure of the oil pumping unit and the horizontal axis representing the time, and the virtual keys shown in fig. 1 comprise a homepage, a 1# wellhead flow parameter, alarm information, a data report and a data curve; the current interface shown in fig. 1 is the content displayed after clicking a data curve button on the home page of the touch screen, and the interval of data points on the curve is 60 seconds; the jacket pressure in the last diagram in fig. 1 is zero, and the oil pressure is the lower one of the two upper curves.
Furthermore, the intelligent pre-warning automatic intervention system for the parameters of the oil well head also comprises a cloud service and alarm module, and when the current pumping unit motor current data I exceeds or is lower than the current average value I of the pumping unit motor in the previous 5 days in the first control mode 5 Or when the pressure difference exceeds or is lower than 20% of the average value in the previous 5 days in the second control mode, sending an alarm signal to the server and the controller to remind inspection personnel of performing field inspection on the current wellhead; the alarm information can be displayed on a touch screen by clicking an alarm information virtual button in fig. 1 to display a list of alarm time and time categories for a user to view.
The system can automatically track and analyze the abnormity according to the well condition parameters of the wellhead of the oil well, automatically adjust the dilution accompanying delivery amount in real time, does not need manual intervention, is simple and efficient, realizes intelligent dilution, and solves the problem of abnormal oil wells caused by untimely parameter adjustment of remote wells; the adjustment interval time is short, the dilution amount is adjusted quickly, the dosage of the diluted oil is saved, the normal transportation of the crude oil is ensured, and the yield of the crude oil is improved; the system can meet the intelligent parameter adjustment under different states, can automatically adjust the dilution amount in real time according to the current change of the motor of the pumping unit, and is more suitable for the flow control of the pumping well; the dilution amount can be automatically adjusted in real time according to the well temperature, oil pressure and casing pressure changes, the flow control device is more suitable for the flow control of the flowing well, and the dilution mode is selected manually according to the specific well.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (5)

1. The utility model provides an oil wellhead parameter intelligence early warning automatic intervention system which characterized in that: the system comprises a current acquisition module, a well temperature acquisition module, an oil pressure acquisition module, a casing pressure acquisition module, a control module and a flow automatic controller arranged on a dilution pipeline;
the current acquisition module is used for acquiring current data of the pumping unit motor;
the well temperature acquisition module is used for acquiring oil return temperature data when the oil well is subjected to dilution regulation;
the oil pressure acquisition module is used for acquiring oil pressure data of an oil pipe, and the casing pressure acquisition module is used for acquiring casing pressure data;
the control module can receive current data, oil return temperature data, oil pressure data and casing pressure data of the oil pumping unit to generate a target dilution amount and send the target dilution amount to the flow automatic controller, and the control module comprises a first module adopting a first control mode, a second module adopting a second control mode and a switching module for switching the control modes among all the modules;
the first module generates a target dilution amount according to current data of a motor of the oil pumping unit, the second module generates the target dilution amount according to oil return temperature data, oil pressure data and casing pressure data, and the switching module determines that the control module is in a first control mode or a second control mode according to a received user instruction;
the first module is configured to generate the target dilution amount as follows:
obtaining the average value of the amount of the adulteration for the first 5 days and the average value of the current of the pumping unit motor for the first 5 days, and respectively defining the values as' y 5 And ` I ` 5
Defining current oil pumping machine motor current data as I, and establishing the following adulteration quantity model:
target dilution amount y =' y 5 +a
Wherein a is the adjustment amount, y,' y 5 The units of a and a are: the volume of the mixture is cubic meter per hour,
in (I- "I 5 )/`I 5 A is-0.3 under the condition that the content is less than or equal to-20 percent,
at-20% < (I- "I) 5 )/`I 5 A is-0.2 under the condition that the content is less than or equal to-15 percent,
at-15% < (I- "I) 5 )/`I 5 A is-0.1 under the condition that the content is less than or equal to-10 percent,
at-10% < (I- "I) 5 )/`I 5 A is 0 under the condition that the content is less than or equal to 10 percent,
at 10% < (I- "I) 5 )/`I 5 Under the condition that the content is less than or equal to 15 percent, a is 0.2,
at 15% < (I- "I) 5 )/`I 5 A is 0.3 under the condition that the content is less than or equal to 20 percent,
in (I- "I 5 )/`I 5 In the case of > 20%, a is 0.5;
the second module is configured to generate the target dilution amount as follows:
obtaining the current adulteration quantity and recording the current adulteration quantity y 0 Calculating the difference value of the oil pressure data and the casing pressure data to obtain a pressure difference delta p, and establishing the following dilution model:
in the case of a decrease in well temperature, (. DELTA.p-0.5 MPa)/0.5 MPa>-6% target dilution y = y 0 -0.1;
Under the condition that the well temperature is reduced, the target dilution amount y = y is less than-6% in the range of-40% ≦ ([ delta ] p-0.5 MPa)/0.5 MPa 0 +0.1; wherein the unit of delta p is MPa, and the current dilution y 0 And the unit of the dilution amount y is cubic meter per hour;
the flow automatic controller is used for automatically controlling the dilution flow according to the target dilution amount.
2. The intelligent early warning automatic intervention system for parameters of an oil well head according to claim 1, characterized in that: the adjustment interval of the dilution flow control is 30 seconds to 900 seconds.
3. The intelligent early warning automatic intervention system for oil wellhead parameters as claimed in claim 1, wherein: the control module is arranged in the PLC cabinet, the current acquisition module is a current transformer arranged in the pumping unit electrical cabinet, the pumping unit electrical cabinet is also provided with a wireless data transmission module, the current transformer acquires the current of the pumping unit motor and then transmits the current back to the PLC cabinet through the data transmission module, and the current transformer is used by the control module to output the target dilution amount.
4. The intelligent early warning automatic intervention system for parameters of an oil well head according to claim 1, characterized in that: the current oil pumping machine motor current data I exceeds or is lower than the current average value 'I' of the oil pumping machine motor in the previous 5 days 5 And sending an alarm signal to the server and the controller to remind inspection personnel of coming to carry out field inspection on the current wellhead.
5. The intelligent early warning automatic intervention system for oil wellhead parameters as claimed in claim 1, wherein: the touch control screen is internally provided with a storage module, a chart module and virtual keys which can be displayed on the touch control screen;
the storage module stores all oil pumping machine motor current data, oil return temperature data, oil pressure data, casing pressure data and real-time dilution flow data within a certain time; the chart module is used for calling related data according to a set time range and a set time interval and displaying a change curve or a table of the current, the oil return temperature, the oil pressure data, the casing pressure data and the real-time dilution flow along with time of the oil pumping unit on a touch screen; the virtual key is used for receiving touch from a user to enable the control module to select the first control mode or the second control mode and set various parameters.
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