CN114382447A - Intelligent control method and device for intermittent pumping of pumping unit - Google Patents

Abstract

The invention relates to the technical field of motor control, in particular to an intelligent control method and device for intermittent pumping of a pumping unit, and aims to solve the problem that the accuracy of a method for judging whether a control mode of the pumping unit is intermittent pumping or not based on a ground indicator diagram in the prior art is low. For this purpose, the intelligent control method for intermittent pumping of the pumping unit comprises the following steps: determining an oil well ground indicator diagram based on the voltage signal and the current signal of the driving motor; determining an indicator diagram at the bottom of the oil well based on the indicator diagram at the ground of the oil well; judging whether the pumping unit is in a non-pumping state or not based on an indicator diagram at the bottom of the oil well; when the pumping unit is in the idle pumping state, the driving motor of the pumping unit is controlled, so that the pumping unit operates in an intermittent pumping control mode.

Description

Intelligent control method and device for pumping between pumping units

technical field

The invention relates to the technical field of motor control, and in particular provides an intelligent control method and device for pumping between oil pumping units.

Background technique

For a long time, with the continuous exploitation of crude oil in various oil fields, some oil wells in my country have entered the middle and late stages of exploitation, and the underground oil layers have obviously insufficient liquid supply capacity. During normal operation, the pumping units in this part of the well mostly run with light load, and sometimes there will be different degrees of "pump emptying", and even empty pumping will occur. During empty pumping, the motor of the pumping unit is in light-load operation, the working efficiency of the pumping unit is not high, the equipment loss increases, and electrical energy is wasted. In addition, during empty pumping, the oil pump has a very low fullness during the upstroke, and the wellhead tubing basically produces no oil, so the sucker rod cannot be cooled by the flowing crude oil, resulting in heat and damage to the sucker rod. Evacuation for a long time will also damage the underground structure of the oil well, causing the oil well to be scrapped in advance before it reaches its lifespan, resulting in huge losses.

The traditional indirect pumping control generally uses oil well parameter adjustment, such as timing and artificially changing the stroke and stroke of the pumping unit, but this method is relatively vague in determining the time interval between the start-up and shutdown of the oil-pumping well, and it also requires more responsibility for the workers on the post. High, manual parameter adjustment control accuracy is not high, personnel workload is large, and it is impossible to avoid empty pumping in time. In addition, the commonly used method is to measure the dynamometer diagram of the wellhead of the pumping unit. By adding a load sensor and a displacement sensor to the polished rod of the pumping unit, the change of the oil well state is judged, and the wellhead dynamometer diagram is measured according to the change of the oil well state. According to the dynamometer diagram, judge the empty pumping state of the oil well, and set the appropriate start, stop point and intermittent time for the pumping unit, so as to realize the intermittent operation of the oil well, enter the intermittent pumping state, and achieve the purpose of controlling the "empty pumping". The disadvantage is that due to the addition of load sensors and displacement sensors, the workload of installation and maintenance is increased. In particular, the dynamometer diagram of the surface wellhead of the pumping unit obtained by this method reflects the relationship curve between the load of the pumping unit on the ground and the displacement, that is, the situation of the wellhead on the ground. Due to the large length of the sucker rod, it is difficult to work in the oil well. In the project, due to the fluctuation of the load and the complex environment in the well, the oil rod is continuously stretched and shortened, so that after the transmission of the sucker rod, the ground indicator diagram will be very different from the indicator diagram of the bottom part. This results in inaccurate or even distorted judgment of the empty pumping, which seriously affects the operation of the oil well emptying control.

Accordingly, there is a need in the art for a new intelligent control scheme for pumping between pumping units to solve the above problems.

SUMMARY OF THE INVENTION

In order to overcome the above drawbacks, the present invention is proposed to solve or at least partially solve the technical problem of low accuracy in the prior art method for judging whether the pumping unit control mode is indirect pumping based on the ground dynamometer. The invention provides an intelligent control method and device for pumping between oil pumping units.

In a first aspect, the present invention provides an intelligent control method for pumping between oil pumping units, comprising the following steps: determining an oil well ground dynamometer based on a voltage signal and a current signal of a driving motor; determining an oil well based on the oil well ground dynamometer Bottom-hole dynamometer; based on the oil well bottom-hole dynamometer to determine whether the pumping unit is in an empty pumping state; when the oil pumping unit is in an empty pumping state, the driving motor of the pumping unit is controlled to make all The pumping unit described above operates in the indirect pumping control mode.

In one embodiment, determining the oil well surface dynamometer based on the voltage signal and the current signal of the driving motor includes: detecting the voltage signal and the current signal of the driving motor; determining the stroke period and the active power of the pumping unit based on the voltage signal and the current signal Power; the oil well surface dynamometer is determined based on the stroke cycle and active power of the pumping unit.

In one embodiment, determining the bottom hole dynamometer of the oil well based on the oil well surface dynamometer includes: establishing a kinematics model of the sucker rod; performing mechanical analysis on the sucker rod based on the kinematics model to obtain the sucker rod The dynamic equation of the oil rod; initial conditions and boundary conditions are determined based on the oil well surface dynamometer; using the initial conditions and boundary conditions to differentially solve the dynamic equation of the oil rod, the bottom hole of the oil well is obtained dynamometer diagram.

In one embodiment, judging whether the pumping unit is in an empty pumping state based on the bottom-hole dynamometer of the oil well includes: judging whether the shape of the bottom-hole dynamometer of the oil well is consistent with the shape of a preset dynamometer, and in the In the case where the shape of the bottom-hole dynamometer of the oil well is inconsistent with the shape of the preset dynamometer, it is determined that the pumping unit is in an empty pumping state, and the shape of the preset dynamometer is the dynamometer determined during the standard oil production of the oil well shape.

In one embodiment, when the pumping unit is in an empty pumping state, controlling the driving motor of the pumping unit so that the pumping unit operates in an intermediate pumping control mode includes: when the pumping unit is in an empty pumping state In the empty pumping state, the pumping unit is sent to the frequency converter to convert the frequency to reduce the rotational speed of the drive motor, so that the pumping unit runs in the indirect pumping control mode.

In a second aspect, the present invention provides an intelligent control device for pumping between oil pumping units, which is characterized by comprising: a first determination module configured to determine the oil well ground dynamometer based on the voltage signal and the current signal of the driving motor; The second determination module is configured to determine the oil well bottom dynamometer based on the oil well surface dynamometer; the judgment module is configured to judge whether the pumping unit is in an empty pumping state based on the oil well bottom dynamometer; the control module , which is configured to control the driving motor of the pumping unit when the pumping unit is in an empty pumping state, so that the pumping unit operates in an intermediate pumping control mode.

In one embodiment, the first determination module includes: a detection sub-module configured to detect a voltage signal and a current signal of the driving motor; a first determination sub-module configured to determine the pumping power based on the voltage signal and the current signal the stroke period and active power of the oil unit; the second determining submodule is configured to determine the oil well surface dynamometer based on the stroke period and active power of the oil pumping unit.

In one embodiment, the judging module is further configured to: judge whether the shape of the bottom-hole dynamometer of the oil well is consistent with the shape of the preset dynamometer, and the shape of the bottom-hole dynamometer of the oil well is the same as the preset indication. In the case that the shapes of the power diagrams are inconsistent, it is determined that the pumping unit is in an empty pumping state, and the shape of the preset power indicator diagram is the shape of the power indicator diagram determined during the standard oil production of the oil well.

In a third aspect, there is provided an electronic device comprising a processor and storage means adapted to store a plurality of pieces of program code adapted to be loaded and run by the processor to perform the foregoing Any one of the intelligent control methods for pumping between pumping units.

In a fourth aspect, a computer-readable storage medium is provided, the computer-readable storage medium having stored therein a plurality of program codes, the program codes being adapted to be loaded and executed by a processor to perform the extraction process described in any of the preceding items. The intelligent control method of pumping between oil machines.

The above-mentioned one or more technical solutions of the present invention have at least one or more of the following beneficial effects:

In the intelligent control method and device for pumping between pumping units provided by the present invention, firstly, the bottom-hole dynamometer of the oil well is determined by the well-surface dynamometer, and then whether the control mode of the pumping unit is the indirect-pumping control mode is determined by using the bottom-hole dynamometer of the oil well , and when the pumping unit control mode is the indirect pumping control mode, the driving motor of the pumping unit is controlled to make the pumping unit run in the indirect pumping state, which improves the accuracy of the judgment of the pumping unit control mode and saves money. It plays an important role in maintaining energy conservation and consumption reduction of oil production in oilfields.

Based on the established sucker rod kinematics model, the oil well surface dynamometer is converted into the oil well bottom dynamometer, which avoids the current accuracy of judging whether the pumping unit control mode is indirect pumping based on the ground dynamometer. It solves the technical problems that the degree of control is low and it is difficult to meet the actual needs of users, which improves the accuracy of the intermittent pumping control and meets the needs of customers.

Description of drawings

The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It can be easily understood by those skilled in the art that these drawings are only for the purpose of illustration, and are not intended to limit the protection scope of the present invention. In addition, like numerals in the figures are used to designate like parts, where:

1 is a schematic flowchart of the main steps of an intelligent control method for pumping between pumping units according to an embodiment of the present invention;

2 is a schematic structural diagram of a sucker rod kinematics model according to an embodiment of the present invention;

3 is a flowchart of an intelligent control method for pumping between pumping units according to an embodiment of the present invention;

FIG. 4 is a schematic block diagram of the main structure of an intelligent control device for pumping between pumping units according to an embodiment of the present invention.

List of reference numbers :

11: a first determination module; 12: a second determination module; 13: a judgment module; 14: a control module.

Detailed ways

Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

In the description of the present invention, "module" and "processor" may include hardware, software or a combination of both. A module may include hardware circuits, various suitable sensors, communication ports, memory, and may also include software parts, such as program codes, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Non-transitory computer-readable storage media includes any suitable medium that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, and the like. The term "A and/or B" means all possible combinations of A and B, such as just A, just B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and/or B" and can include just A, just B, or A and B. The terms "a" and "the" in the singular may also include the plural.

At present, the traditional method is based on the ground dynamometer to judge whether the control mode of the pumping unit is indirect pumping. This method has low accuracy and is difficult to meet the actual needs of users. To this end, the present application provides an intelligent control method and device for pumping between pumping units. First, the bottom-hole dynamometer of the oil well is determined by the well-surface dynamometer, and then the bottom-hole dynamometer of the oil well is used to determine whether the pumping unit control mode is It is the indirect pumping control mode, and when the pumping unit control mode is the indirect pumping control mode, the driving motor of the pumping unit is controlled to make the pumping unit run in the indirect pumping state, which improves the judgment of the pumping unit control mode. Accuracy, cost savings, and play an important role in maintaining energy conservation and consumption reduction in oilfield production.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of main steps of an intelligent control method for pumping between pumping units according to an embodiment of the present invention. As shown in FIG. 1 , the intelligent control method for pumping between pumping units in the embodiment of the present invention mainly includes the following steps S101-S104.

Step S101: Determine the oil well surface dynamometer based on the voltage signal and the current signal of the driving motor, which can be specifically implemented by the following steps S1011-S1013.

Step S1011: Detect the voltage signal and the current signal of the driving motor. Specifically, a voltage sensor is used to detect the voltage signal of the driving motor, and a current sensor is used to detect the current signal of the driving motor.

和电流相位信号

对电压相位信号

和电流相位信号

作差可以得到电压与电流的相位差，即功率因数角

其次，根据电压、电流的数值和功率因数角计算获得油井的实时功率为

Step S1012: Determine the stroke period and active power of the pumping unit based on the voltage signal and the current signal. Specifically, according to the detected periodic characteristics of the current change of the above-mentioned current signal, it can be determined that the time when the oil well completes one up and down stroke of oil production is the period of each stroke. In addition, according to the aforementioned detected voltage signal and current signal, the values of the voltage signal u and the current signal i and the voltage phase signal can be obtained

and the current phase signal

to the voltage phase signal

and the current phase signal

The difference can be used to obtain the phase difference between the voltage and the current, that is, the power factor angle

Secondly, according to the value of voltage, current and power factor angle, the real-time power of the oil well is calculated as

Step S1013: Determine the oil well surface dynamometer based on the stroke period and active power of the pumping unit. Specifically, after obtaining the stroke period and active power of the pumping unit, the active power can be converted into the suspended point load of the pumping unit by using the conversion formula from active power to the suspended point load, and then according to the stroke period, the pumping unit The displacement of the polished rod is the abscissa and the ordinate, and the oil well surface indicator diagram is drawn with the suspended point load of the pumping unit as the ordinate.

Step S102: Determine the bottom-hole dynamometer of the oil well based on the oil-well surface dynamometer. The surface dynamometer diagram of the oil well reflects the relationship curve between the suspended load and displacement of the pumping unit, that is, the situation on the ground. The actual working condition of the downhole components of the pumping unit is the real reflection of the aggregation of underground crude oil, so that the best realization can be achieved. In order to control the oil well, it is necessary to obtain the dynamometer diagram at any section of the well. The present application mainly realizes the conversion from the oil well surface indicator diagram to the oil well bottom indicator diagram by establishing the kinematics model of the sucker rod. First, the kinematics model of the sucker rod is established; Mechanical analysis, the dynamic equation of the sucker rod is obtained; secondly, the initial conditions and boundary conditions are determined based on the oil well surface indicator diagram; using the initial conditions and boundary conditions to differentially solve the dynamic equation of the sucker rod, the bottom hole indicator of the oil well is obtained. Power map.

Generally speaking, the kinematics model of the sucker rod is established as shown in Figure 2. The analysis is performed with a section of sucker rod with a length of Δx, where x is the position of the suspension point of the sucker rod before moving, and u(x, t) is the displacement parameter , f _x , f _x+Δx are the force parameters of the analyzed section of the sucker rod, f _a is the inertial force of the analyzed sucker rod section, f _d is the viscous damping force of the analyzed sucker rod section, f _w is the The gravity of the analyzed sucker rod section, _Er is the elastic modulus of the analyzed sucker rod section, _{Ar is the cross-sectional area of the analyzed sucker rod section, ρ r is} the density of the analyzed sucker rod section, V _e is the viscous resistance parameter of the analyzed sucker rod section, and the mechanical analysis of the analyzed sucker rod section is carried out, and the following mechanical equation is obtained:

f _w =ρ _r A _r Δxg

From the axial force of the analyzed sucker rod section ∑F _x =0, the dynamic equation of the analyzed sucker rod can be obtained:

ρ _r A _r g is a known constant that can be obtained from the above parameters, so the kinetic equation simplifies to:

c is the speed of sound, c=(E _r /ρ _r ) ^1/2 , v is the damping coefficient, v=V _e /(ρ _r A _r ).

The initial and boundary conditions can then be obtained from the well surface dynamometer diagram, where the boundary conditions are:

U(x,t)| _x=0 =U(t)

The initial conditions are:

U(x,t)| _t=0 =U(x)

F(x,t)| _t=0 =L(x)-W _r

U(x) represents the measured dynamometer displacement, L(x) represents the measured dynamometer load, W _r represents the weight of the sucker rod string in the well fluid, and W _r is a constant. Among them, U(x), L(x) and U(t) can be obtained from the oil well surface indicator diagram. According to the initial conditions and boundary conditions of the above dynamic equations, the dynamic equations are differentially solved, that is, the initial conditions and boundary conditions are substituted into the dynamic equations to solve, and the solution of the bottom hole dynamometer diagram is obtained as:

Among them, u _i+1,j represents the displacement of the sucker rod at each level of rod string section, Δx represents the step size along the sucker rod direction, i represents the subscript of the sucker rod step size, and j represents the time step Long subscript, Δt is the time step, v is the damping coefficient, and c is the speed of sound. F _i,j represents the dynamic load of any section i of the sucker rod at time j. According to the displacement u _i+1,j of the sucker rod at the cross-section of each rod string obtained above and the dynamic load of any section i of the sucker rod at the time j, the bottom-hole dynamometer diagram of the oil well can be drawn.

Based on the established sucker rod kinematics model, the oil well surface dynamometer is converted into the oil well bottom dynamometer, which avoids the current accuracy of judging whether the pumping unit control mode is indirect pumping based on the ground dynamometer. It solves the technical problems that the degree of control is low and it is difficult to meet the actual needs of users, which improves the accuracy of the intermittent pumping control and meets the needs of customers.

Step S103: judging whether the pumping unit is in an empty pumping state based on the oil well bottom dynamometer, specifically judging whether the shape of the oil well bottom dynamometer is consistent with the preset dynamometer shape, the shape of the oil well bottom dynamometer In the case of inconsistency with the shape of the preset dynamometer diagram, it is determined that the pumping unit is in an empty pumping state, wherein the preset dynamometer diagram shape is the shape of the dynamometer diagram determined during the standard oil production of the oil well. Specifically, the real situation of oil at the bottom of the well is judged according to the shape of the dynamometer at the bottom of the well. Under normal conditions, that is, when the oil in the well is sufficient, the dynamometer is approximately a parallelogram, and this shape is the preset dynamometer. shape. If the bottom-hole oil is insufficient, the shape of the indicator diagram will be affected. At this time, a part of the indicator diagram will be missing, indicating that the oil well has entered the empty pumping state. Whether the pumping unit is in the empty pumping state can be determined by comparing the shape of the bottom-hole indicator diagram of the oil well with the shape of the preset indicator diagram. The oil engine is in the state of empty pumping.

Step S104 : when the pumping unit is in the empty pumping state, control the driving motor of the pumping unit, so that the pumping unit operates in the intermediate pumping control mode. Specifically, when the pumping unit is in the empty pumping state, it can be controlled to enter the economical operation state or the indirect pumping control mode. On the one hand, when the pumping unit is in the state of empty pumping, the system outputs the intermittent pumping signal to the frequency converter to control the stroke and the number of strokes of the pumping unit frequency converter and adjust the different speeds and times of the upper and lower strokes. This process is an intelligent self-learning process. The system, the inverter and the drive motor form an automatic closed-loop control system. According to the empty pumping state of the system, the output signal of the system is continuously and automatically adjusted, and the inverter is controlled to convert the frequency to adjust the speed of the drive motor. Thereby, the stroke and stroke of the pumping unit are adjusted, and the oil well can be directly operated in the optimal economic state. On the other hand, if the speed of the drive motor is adjusted by controlling the frequency conversion of the pumping unit inverter, the pumping unit cannot be controlled to reach the non-empty pumping state, that is, the underground dynamometer obtained from the dynamic equation is still missing, indicating that the oil well When the liquid volume is very low, the oil well needs to enter the intermediate pumping state, that is, control the pumping unit to enter the intermediate pumping control mode. When the pumping unit is in the indirect pumping control mode, send the indirect pumping signal to the inverter to reduce the speed of the drive motor or stop the pumping unit for a period of time, wait for the bottom hole oil to accumulate, and then restart the oil well for pumping. This is also an intelligent self-learning process. The system continuously calculates the bottom hole dynamometer after each restart of the oil well, and judges whether it is necessary to enter the intermittent pumping mode according to the bottom hole dynamometer, so as to control the frequency conversion of the inverter to realize automatic adjustment of the intermittent pumping time. (ie well downtime), so that the pumping unit operates in the indirect pumping control mode.

Based on the above steps S101-S104, determine the bottom-hole dynamometer of the oil well through the well-surface dynamometer, and then use the bottom-hole dynamometer of the oil well to determine whether the pumping unit control mode is the indirect pumping control mode, and in the pumping unit control mode When it is in the indirect pumping control mode, the driving motor of the pumping unit is controlled to make the pumping unit run in the indirect pumping state, which improves the accuracy of the judgment of the control mode of the pumping unit, saves the cost, and saves energy for the maintenance of oil production in the oil field. Consumption reduction has played an important role.

As shown in Figure 3, based on the bottom hole dynamometer, it can be judged whether the pumping unit is in the empty pumping state. When the pumping unit is in the empty pumping state, the pumping unit can further enter the intermittent pumping state or the economical operation state. When the oil well is not in the empty pumping state, continue to monitor the voltage signal and current signal of the driving motor.

It should be pointed out that, although the steps in the above embodiments are described in a specific sequence, those skilled in the art can understand that in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such an order. It may be performed simultaneously (in parallel) or in other sequences, and these variations are within the scope of the present invention.

Further, the present invention also provides an intelligent control device for pumping between pumping units.

Referring to FIG. 4 , FIG. 4 is a main structural block diagram of an intelligent control device for pumping between pumping units according to an embodiment of the present invention. As shown in FIG. 4 , the intelligent control device for pumping between pumping units in the embodiment of the present invention mainly includes a first determination module 11 , a second determination module 12 , a determination module 13 and a control module 14 . In some embodiments, one or more of the first determination module 11 , the second determination module 12 , the judgment module 13 and the control module 14 may be combined into one module. In some embodiments, the first determination module 11 may be configured to determine the oil well surface dynamometer based on the voltage signal and the current signal of the drive motor. The second determination module 12 may be configured to determine the bottom hole dynamometer of the oil well based on the surface dynamometer of the oil well. The judging module 13 may be configured to judge whether the pumping unit is in an empty pumping state based on the bottom hole dynamometer of the oil well. The control module 14 may be configured to control the driving motor of the oil pumping unit when the oil pumping unit is in an empty pumping state, so that the oil pumping unit operates in an intermediate pumping control mode. In an implementation manner, for the description of the specific implementation function, reference may be made to the descriptions in steps S101 to S104.

In one embodiment, the first determination module includes a detection submodule, a first determination submodule and a second determination submodule. The detection sub-module may be configured to detect the voltage signal and the current signal of the driving motor. The first determination sub-module may be configured to determine the stroke period and active power of the pumping unit based on the voltage signal and the current signal. The second determination sub-module may be configured to determine the oil well surface dynamometer based on the stroke period and the active power of the pumping unit.

In one embodiment, the judging module is further configured to judge whether the shape of the bottom-hole dynamometer of the oil well is consistent with the shape of the preset dynamometer. , determine that the pumping unit is in an empty pumping state, and the preset dynamometer graph shape is the dynamometer graph shape determined during the standard oil production of the oil well.

The above-mentioned intelligent control device for pumping between pumping units is used to implement the embodiment of the intelligent control method for pumping between pumping units shown in FIG. Technical personnel can clearly understand that, for the convenience and simplicity of description, the specific working process and related description of the intelligent control device for pumping between pumping units can refer to the content described in the embodiment of the intelligent control method for pumping between pumping units. It is not repeated here.

Those skilled in the art can understand that all or part of the process in the method for implementing the above-mentioned embodiment of the present invention can also be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a computer-readable In the storage medium, when the computer program is executed by the processor, the steps of the foregoing method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like. The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier Signals, telecommunications signals, and software distribution media. It should be noted that the content contained in the computer-readable storage medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, computer-readable Storage media exclude electrical carrier signals and telecommunications signals.

Further, the present invention also provides an electronic device. In an electronic device embodiment according to the present invention, the electronic device includes a processor and a storage device, the storage device can be configured to store a program for executing the intelligent control method for pumping between pumping units according to the above method embodiments, and the processor can be configured The program is used to execute the program in the storage device, the program includes but is not limited to the program for executing the intelligent control method for pumping between pumping units according to the above method embodiments. For the convenience of description, only the parts related to the embodiments of the present invention are shown, and the specific technical details are not disclosed, please refer to the method part of the embodiments of the present invention.

Further, the present invention also provides a computer-readable storage medium. In an embodiment of a computer-readable storage medium according to the present invention, the computer-readable storage medium may be configured to store a program for executing the intelligent control method for pumping between pumping units according to the above method embodiment, where the program may be loaded by a processor and executed Operation to realize the above-mentioned intelligent control method of pumping between pumping units. For the convenience of description, only the parts related to the embodiments of the present invention are shown, and the specific technical details are not disclosed, please refer to the method part of the embodiments of the present invention. The computer-readable storage medium may be a storage device device formed by various electronic devices. Optionally, the computer-readable storage medium in this embodiment of the present invention is a non-transitory computer-readable storage medium.

Further, it should be understood that since the setting of each module is only for describing the functional units of the apparatus of the present invention, the physical device corresponding to these modules may be the processor itself, or a part of software in the processor, a part of hardware, or Part of the combination of software and hardware. Therefore, the numbers of the various modules in the figures are merely schematic.

Those skilled in the art can understand that each module in the device can be split or combined adaptively. Such splitting or merging of specific modules will not cause the technical solutions to deviate from the principles of the present invention, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. An intelligent control method for intermittent pumping of a pumping unit is characterized by comprising the following steps:

determining an oil well ground indicator diagram based on the voltage signal and the current signal of the driving motor;

determining an oil well bottom indicator diagram based on the oil well ground indicator diagram;

judging whether the oil pumping unit is in a non-pumping state or not based on the indicator diagram at the bottom of the oil well;

and when the pumping unit is in an idle pumping state, controlling a driving motor of the pumping unit so as to enable the pumping unit to operate in an intermittent pumping control mode.

2. The intelligent control method for intermittent pumping of the pumping unit according to claim 1, wherein the step of determining the oil well ground indicator diagram based on the voltage signal and the current signal of the driving motor comprises the following steps:

detecting a voltage signal and a current signal of a driving motor;

determining a stroke cycle and active power of the pumping unit based on the voltage signal and the current signal;

and determining an oil well ground indicator diagram based on the stroke cycle and the active power of the oil pumping unit.

3. The intelligent pumping unit interval pumping control method according to claim 1, wherein the step of determining the downhole indicator diagram based on the surface indicator diagram comprises the steps of:

establishing a motion mechanics model of the sucker rod;

performing mechanical analysis on the sucker rod based on the motion mechanical model to obtain a kinetic equation of the sucker rod;

determining initial conditions and boundary conditions based on the oil well ground indicator diagram;

and carrying out differential solution on the kinetic equation of the sucker rod by using the initial condition and the boundary condition to obtain the indicator diagram at the bottom of the oil well.

4. The intelligent control method for intermittent pumping of the pumping unit according to claim 1, wherein the step of judging whether the pumping unit is in a pumping-empty state or not based on the indicator diagram at the bottom of the oil well comprises the following steps: and judging whether the shape of the indicator diagram at the bottom of the oil well is consistent with the shape of a preset indicator diagram or not, determining that the oil pumping unit is in an idle pumping state under the condition that the shape of the indicator diagram at the bottom of the oil well is inconsistent with the shape of the preset indicator diagram, wherein the shape of the preset indicator diagram is the indicator diagram shape determined during standard oil extraction of the oil well.

5. The intelligent control method for intermittent pumping of the pumping unit according to claim 1, wherein when the pumping unit is in an idle pumping state, controlling a drive motor of the pumping unit so that the pumping unit operates in an intermittent pumping control mode comprises: and when the oil pumping machine is in an idle pumping state, sending an intermittent pumping signal to a frequency converter for frequency conversion so as to reduce the rotating speed of a driving motor, so that the oil pumping machine operates in an intermittent pumping control mode.

6. The utility model provides an intelligent control device is taken out between beam-pumping unit which characterized in that includes:

a first determination module configured to determine an oil well surface indicator diagram based on the voltage signal and the current signal of the drive motor;

a second determination module configured to determine a downhole indicator diagram based on the uphole indicator diagram;

the judging module is configured to judge whether the pumping unit is in an idle pumping state or not based on the indicator diagram at the bottom of the oil well;

the control module is configured to control a driving motor of the pumping unit when the pumping unit is in a pumping-out state, so that the pumping unit operates in a pumping-between control mode.

7. The intelligent control device of pumping unit intermittent pumping according to claim 6, wherein the first determining module comprises:

a detection submodule configured to detect a voltage signal and a current signal of the driving motor;

a first determining submodule configured to determine a stroke cycle and an active power of the pumping unit based on the voltage signal and the current signal;

a second determination submodule configured to determine a well surface indicator diagram based on a stroke cycle and active power of the pumping unit.

8. The intelligent pumping control device of claim 6, wherein the determination module is further configured to: and judging whether the shape of the indicator diagram at the bottom of the oil well is consistent with the shape of a preset indicator diagram or not, determining that the oil pumping unit is in an idle pumping state under the condition that the shape of the indicator diagram at the bottom of the oil well is inconsistent with the shape of the preset indicator diagram, wherein the shape of the preset indicator diagram is the indicator diagram shape determined during standard oil extraction of the oil well.

9. An electronic device comprising a processor and a storage means adapted to store a plurality of program codes, wherein said program codes are adapted to be loaded and run by said processor to perform the pumping unit intermittence intelligence control method of any of claims 1 to 5.

10. A computer readable storage medium having stored therein a plurality of program codes, wherein said program codes are adapted to be loaded and run by a processor to perform the pumping unit intermittent intelligent control method according to any one of claims 1 to 5.

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