CN114382447A - Intelligent control method and device for intermittent pumping of pumping unit - Google Patents
Intelligent control method and device for intermittent pumping of pumping unit Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 270
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000010586 diagram Methods 0.000 claims abstract description 136
- 239000003129 oil well Substances 0.000 claims abstract description 94
- 238000003860 storage Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 46
- 238000006073 displacement reaction Methods 0.000 description 9
- 239000000725 suspension Substances 0.000 description 6
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- 230000008859 change Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
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- 238000004134 energy conservation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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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
Technical Field
The invention relates to the technical field of motor control, and particularly provides an intelligent control method and device for intermittent pumping of an oil pumping unit.
Background
For a long time, along with continuous exploitation of crude oil by each oil field, part of oil wells in China enter the middle and later stages of exploitation, and the situation that the liquid supply capacity of an underground oil layer is obviously insufficient occurs. The pumping units of the part of wells are mostly operated under light load during normal operation, and sometimes pump-out in different degrees and even pump-out phenomenon can occur. When the pumping unit is empty, the motor of the pumping unit is in light-load operation, the working efficiency of the pumping unit is not high, the equipment loss is increased, and the electric energy waste can be caused. In addition, the oil pump is very low in fullness during the upstroke during empty pumping, and the oil pipe at the well head basically does not produce oil, so that the pumping rod cannot be cooled by flowing crude oil, and the pumping rod is heated and damaged. The underground structure of the oil well can be damaged by long-time air pumping, so that the oil well is scrapped in advance without reaching the service life, and huge loss is brought.
The traditional intermittent pumping control generally adopts oil well parameter adjustment, such as timing manual change of stroke, stroke frequency and the like of the pumping unit, but the method has the defects of fuzzy determination of starting and stopping time intervals of the pumping well, higher requirement on responsibility of post workers, low manual parameter adjustment control precision, large workload of personnel and incapability of avoiding idle pumping and other conditions in time. In addition, the commonly adopted method is to measure the indicator diagram of the wellhead of the oil pumping unit, judge the change of the oil well state by additionally arranging a load sensor and a displacement sensor on the polished rod of the oil pumping unit, measure the indicator diagram of the wellhead according to the change of the oil well state, judge the idle pumping state of the oil well according to the indicator diagram, and set proper starting and stopping points and intermittent time for the oil pumping unit, thereby realizing the intermittent operation of the oil well, entering the idle pumping state and achieving the purpose of controlling the idle pumping. The defect is that the workload is increased for installation and maintenance due to the additional installation of the load sensor and the displacement sensor. Especially, the ground well head indicator diagram of the pumping unit obtained by the method reflects the relation curve of the suspension point load and the displacement of the pumping unit, namely the condition of the ground well head part, because the length of the pumping rod is large, in the working engineering of an oil well, the pumping rod is continuously stretched and shortened because of the fluctuation of the load and the complex environment in the well, and thus after the pumping rod is transmitted, the ground indicator diagram is greatly different from the indicator diagram of the well bottom part, so that the judgment of the air pumping is inaccurate, even distorted, and the operation of the air pumping control of the oil well is seriously influenced.
Accordingly, there is a need in the art for a new pumping unit intermittent pumping intelligent control scheme to solve the above problems.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks, the present invention is proposed to provide a method for solving or at least partially solving the technical problem of low accuracy of the prior art method for determining whether the pumping unit control mode is intermittent pumping based on the ground indicator diagram. The invention provides an intelligent control method and device for intermittent pumping of an oil pumping unit.
In a first aspect, the invention provides an intelligent control method for intermittent pumping of a pumping unit, which 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 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.
In one embodiment, determining the well surface indicator diagram based on the voltage signal and the current signal of the drive motor comprises: 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.
In one embodiment, determining the downhole indicator diagram based on the wellsite indicator diagram comprises: 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.
In one embodiment, the determining whether the pumping unit is in the idle pumping state based on the downhole indicator diagram comprises: 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.
In one embodiment, controlling a drive motor of the pumping unit to operate the pumping unit in a pumping control mode when the pumping unit is in a pumping idle state 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.
In a second aspect, the present invention provides an intelligent control device for intermittent pumping of a pumping unit, comprising: 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.
In one embodiment, 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.
In one embodiment, the determining 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.
In a third aspect, an electronic device is provided, which comprises a processor and a storage device, wherein the storage device is adapted to store a plurality of program codes, and the program codes are adapted to be loaded and run by the processor to execute the pumping unit intermittent pumping intelligent control method according to any one of the preceding claims.
In a fourth aspect, a computer readable storage medium is provided, having stored therein a plurality of program codes adapted to be loaded and executed by a processor to perform the pumping unit intermittent pumping intelligent control method of any one of the preceding claims.
One or more technical schemes of the invention at least have one or more of the following beneficial effects:
the invention provides an intelligent control method and device for intermittent pumping of a pumping unit, which are characterized in that an indicator diagram at the bottom of an oil well is determined through a well ground indicator diagram, then whether a control mode of the pumping unit is an intermittent pumping control mode is judged by utilizing the indicator diagram at the bottom of the oil well, and a driving motor of the pumping unit is controlled when the control mode of the pumping unit is the intermittent pumping control mode, so that the pumping unit operates in an intermittent pumping state, the judgment accuracy of the control mode of the pumping unit is improved, the cost is saved, and the method and device play an important role in energy conservation and consumption reduction of oil extraction in an oil field.
The method has the advantages that the established motion mechanics model of the pumping rod is used as a basis, the oil well ground indicator diagram is converted into the oil well bottom indicator diagram, the technical problems that whether the pumping unit control mode is intermittent pumping is judged based on the ground indicator diagram at present, accuracy is low, and actual requirements of users are difficult to meet are solved, accuracy of intermittent pumping control is improved, and customer requirements are met.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are for illustrative purposes only and are not intended to constitute a limitation on the scope of the present invention. Moreover, in the drawings, like numerals are used to indicate like parts, and in which:
fig. 1 is a schematic flow chart of main steps of an intelligent pumping control method of a pumping unit according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a sucker rod motion mechanics model according to one embodiment of the present invention;
FIG. 3 is a flow chart of a pumping unit intermittent pumping intelligent control method according to one embodiment of the invention;
fig. 4 is a schematic diagram of a main structure of an intelligent pumping control device of a pumping unit according to an embodiment of the invention.
List of reference numerals：
11: a first determination module; 12: a second determination module; 13: a judgment module; 14: and a control module.
Detailed Description
Some embodiments of the 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 for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, a "module" or "processor" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, may comprise software components such as program code, or may be a combination of software and hardware. The processor may be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and/or signal processing functionality. The processor may be implemented in software, hardware, or a combination thereof. Non-transitory computer readable storage media include 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" denotes all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" means similar to "A and/or B" and may include only A, only B, or both A and B. The singular forms "a", "an" and "the" may include the plural forms as well.
At present, the traditional method judges whether the control mode of the oil pumping unit is intermittent pumping or not based on a ground indicator diagram, and the method has low accuracy and is difficult to meet the actual requirements of users. Therefore, the application provides an intelligent control method and device for intermittent pumping of the pumping unit, firstly, the indicator diagram at the bottom of the oil well is determined through the indicator diagram at the surface of the oil well, then whether the control mode of the pumping unit is the intermittent pumping control mode is judged by utilizing the indicator diagram at the bottom of the oil well, and when the control mode of the pumping unit is the intermittent pumping control mode, a driving motor of the pumping unit is controlled, so that the pumping unit operates in the intermittent pumping state, the judgment accuracy of the control mode of the pumping unit is improved, the cost is saved, and the method and device play an important role in energy conservation and consumption reduction of oil extraction in the maintenance field.
Referring to fig. 1, fig. 1 is a flow chart illustrating main steps of an intelligent pumping control method for a pumping unit according to an embodiment of the invention. As shown in fig. 1, the intelligent control method for intermittent pumping of the pumping unit in the embodiment of the invention mainly comprises the following steps S101 to S104.
Step S101: the oil well surface indicator diagram is determined based on the voltage signal and the current signal of the driving motor, and the determination can be specifically realized through the following steps S1011 to S1013.
Step S1011: the method comprises the steps of detecting a voltage signal and a current signal of a driving motor, specifically, detecting the voltage signal of the driving motor by using a voltage sensor, and detecting the current signal of the driving motor by using a current sensor.
Step S1012: the stroke cycle and active power of the pumping unit are determined based on the voltage signal and the current signal. Specifically, according to the detected current variation periodicity characteristics of the current signal, the time of each oil well for completing oil production of an up-down stroke can be determined, namely the period of each stroke. In addition, according to the detected voltage signal and current signal, the values of the voltage signal u and current signal i and the voltage phase signal can be obtained
Sum current phase signal
For voltage phase signal
Sum current phase signal
The difference can be used to obtain the phase difference between voltage and current, i.e. power factor angle
Secondly, calculating and obtaining the real-time power of the oil well according to the numerical values of the voltage and the current and the power factor angle
Step S1013: and determining an oil well ground indicator diagram based on the stroke cycle and the active power of the pumping unit. Specifically, after the stroke cycle and the active power of the oil pumping unit are obtained, the active power can be converted into the suspension point load of the oil pumping unit by using a conversion formula from the active power to the suspension point load, and then an oil well ground indicator diagram is drawn by using the polished rod displacement of the oil pumping unit as a horizontal coordinate and a vertical coordinate and using the suspension point load of the oil pumping unit as a vertical coordinate according to the stroke cycle.
Step S102: and determining an indicator diagram at the bottom of the oil well based on the indicator diagram at the surface of the oil well. The ground indicator diagram of the oil well reflects a relation curve of the suspension point load and the displacement of the pumping unit, namely the condition of the overground part, and the working condition of the underground part of the actual pumping unit really reflects the convergence condition of underground crude oil to optimally realize the control of the oil well, so that the indicator diagram of any section of the underground part needs to be obtained. The method mainly realizes the conversion from the oil well ground indicator diagram to the oil well bottom indicator diagram by establishing a motion mechanics model of the sucker rod, and firstly, the motion mechanics model of the sucker rod is established; then, performing mechanical analysis on the sucker rod based on the motion mechanical model to obtain a kinetic equation of the sucker rod; secondly, 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 an indicator diagram at the bottom of the oil well.
Generally, a mechanical model of the sucker rod motion is established as shown in FIG. 2, and the analysis is performed on a section of the sucker rod with a length Δ x, where x is the position of the suspension point of the sucker rod before moving, u (x, t) is a displacement parameter,fx、fx+Δxis the force parameter of the cross section analyzed by the sucker rod, faIs the inertial force of the rod section under analysis, fdIs the viscous damping force of the rod section under analysis, fwIs the weight of the analyzed sucker rod section, ErIs the modulus of elasticity, A, of the sucker rod section analyzedrIs the cross-sectional area, ρ, of the rod section analyzedrIs the density, V, of the rod section analyzedeThe viscous resistance parameter of the analyzed sucker rod section is analyzed, and the mechanical analysis is carried out on the analyzed sucker rod section to obtain the following mechanical equation:
fw＝ρrArΔxg
from the axial force sigma F of the rod section analyzedxThe kinetic equation for the sucker rod being analyzed can be found as 0:
ρrArg is a known constant that can be calculated from the above parameters, so the kinetic equation reduces to:
c is the speed of sound, c ═ Er/ρr)1/2V is the damping coefficient, V ═ Ve/(ρrAr)。
Then, initial conditions and boundary conditions can be obtained from the oil well ground indicator diagram, wherein the boundary conditions are as follows:
U(x,t)|x＝0＝U(t)
the initial conditions were:
U(x,t)|t＝0＝U(x)
F(x,t)|t＝0＝L(x)-Wr
u (x) represents the measured indicator diagram displacement, L (x) represents the measured indicator diagram load, WrRepresenting the weight of the rod string in the well fluid, WrIs a constant. Wherein U (x) and L (x) and U (t) can be obtained from the oil well ground indicator diagram. And (3) carrying out differential solution on the kinetic equation according to the initial condition and the boundary condition of the kinetic equation, namely substituting the initial condition and the boundary condition into the kinetic equation to solve, and obtaining a solution of the bottom hole indicator diagram as follows:
wherein u isi+1,jRepresents the displacement of the sucker rod at the section of each stage of the sucker rod column, deltax represents the step length along the sucker rod, i represents the subscript of the sucker rod step length, j represents the subscript of the time step length, deltat represents the time step length, v represents the damping coefficient, and c represents the sound velocity. Fi,jShowing the dynamic load of any section i of the sucker rod at the moment j. According to the above obtained displacement u of the sucker rod at the section of each stage of rod columni+1,jAnd the dynamic load of any section i of the sucker rod at the moment j can be used for drawing an indicator diagram at the bottom of the oil well.
The method has the advantages that the established motion mechanics model of the pumping rod is used as a basis, the oil well ground indicator diagram is converted into the oil well bottom indicator diagram, the technical problems that whether the pumping unit control mode is intermittent pumping is judged based on the ground indicator diagram at present, accuracy is low, and actual requirements of users are difficult to meet are solved, accuracy of intermittent pumping control is improved, and customer requirements are met.
Step S103: and judging whether the pumping unit is in an idle pumping state or not based on the indicator diagram at the bottom of the oil well, specifically 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, and determining that the pumping unit is in the 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. Specifically, the real condition of the downhole oil is judged according to the shape of the downhole indicator diagram of the oil well, and in a normal state, namely under the condition that the oil well is sufficient, the indicator diagram is similar to a parallelogram, and the shape is the preset indicator diagram shape. If the oil at the bottom of the well is insufficient, the shape of the indicator diagram is influenced, the indicator diagram lacks a part at the moment, the oil well enters an idle pumping state, the more the indicator diagram is lost, the more serious the idle pumping phenomenon of the oil well is, therefore, whether the pumping unit is in the idle pumping state or not can be determined by comparing the shape of the indicator diagram at the bottom of the oil well with the shape of a preset indicator diagram, and when the shape of the indicator diagram at the bottom of the oil well is inconsistent with the shape of the preset indicator diagram, the idle pumping state of the pumping unit is determined.
Step S104: 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. Specifically, when the pumping unit is in the idle pumping state, the pumping unit can be controlled to enter an economic operation state or an intermittent pumping control mode. On one hand, when the pumping unit is in a pumping state, the system outputs a pumping signal to the frequency converter for frequency conversion, so as to control the stroke and the frequency of stroke of the frequency converter of the pumping unit and adjust different speeds and time of the upper stroke and the lower stroke. The process is an intelligent self-learning process, the system, the frequency converter and the driving motor form an automatic closed-loop control system, the frequency converter is controlled to convert the frequency according to the idle pumping state of the system by continuously and automatically adjusting the output signal of the system so as to adjust the rotating speed of the driving motor, and therefore the stroke frequency and the stroke of the pumping unit are adjusted to enable the pumping unit to directly run in the optimal economic state. On the other hand, if the rotating speed of the driving motor is adjusted by controlling the frequency conversion of the frequency converter of the oil pumping unit, the oil pumping unit still cannot be controlled to reach a non-idle pumping state, namely, the underground indicator diagram obtained according to the kinetic equation still has a defect, which indicates that the liquid amount of the oil well is very small, the oil well needs to enter an intermittent pumping state, namely, the oil pumping unit is controlled to enter an intermittent pumping control mode. When the pumping unit is in the intermittent pumping control mode, an intermittent pumping signal is sent to a frequency converter for frequency conversion so as to reduce the rotating speed of a driving motor or stop the pumping unit for a period of time, oil at the bottom of a well is waited to be gathered, and then the oil well is restarted for pumping oil. The intelligent self-learning process is also realized, the system continuously calculates a bottom indicator diagram after the oil well is restarted each time, and judges whether to enter the intermittent pumping mode according to the bottom indicator diagram, so that the frequency conversion of the frequency converter is controlled to realize the automatic adjustment of the intermittent pumping time (namely the shutdown time of the oil well), and the oil pumping unit operates in the intermittent pumping control mode.
Based on the steps S101 to S104, the bottom indicator diagram of the oil well is determined through the bottom indicator diagram of the oil well, and then the bottom indicator diagram of the oil well is used to determine whether the control mode of the oil pumping unit is the intermittent pumping control mode, and when the control mode of the oil pumping unit is the intermittent pumping control mode, the driving motor of the oil pumping unit is controlled, so that the oil pumping unit operates in the intermittent pumping state, the accuracy of determining the control mode of the oil pumping unit is improved, the cost is saved, and the oil pumping unit plays an important role in maintaining energy conservation and consumption reduction of oil extraction in the oil field.
As shown in fig. 3, whether the pumping unit is in the idle pumping state can be determined based on the bottom indicator diagram, and the pumping unit can further enter the intermittent pumping state or the economic operation state under the condition that the pumping unit is in the idle pumping state. And when the oil well is not in the empty pumping state, the voltage signal and the current signal of the driving motor are continuously monitored.
It should be noted that, although the foregoing embodiments describe each step in a specific sequence, those skilled in the art will understand that, in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such a sequence, and they may be executed simultaneously (in parallel) or in other sequences, and these changes are all within the protection scope of the present invention.
Furthermore, the invention also provides an intelligent control device for intermittent pumping of the pumping unit.
Referring to fig. 4, fig. 4 is a main structural block diagram of an intelligent pumping unit intermittent pumping control device according to an embodiment of the invention. As shown in fig. 4, the pumping unit intermittent pumping intelligent control device in the embodiment of the present invention mainly includes a first determining module 11, a second determining module 12, a determining module 13, and a control module 14. In some embodiments, one or more of the first determining module 11, the second determining module 12, the determining module 13, and the control module 14 may be combined together into one module. In some embodiments the first determination module 11 may be configured to determine the well surface indicator diagram based on the voltage signal and the current signal of the drive motor. The second determination module 12 may be configured to determine the downhole indicator diagram based on the surface indicator diagram. The determination module 13 may be configured to determine whether the pumping unit is in a pumping-empty state based on the indicator diagram at the bottom of the oil well. The control module 14 can be configured to control the drive motor of the pumping unit to operate the pumping unit in the intermittent control mode when the pumping unit is in the idle state. In one embodiment, the description of the specific implementation function may refer to steps S101 to S104.
In one embodiment, the first determination module includes a detection sub-module, a first determination sub-module, and a second determination sub-module. The detection submodule may be configured to detect a voltage signal and a current signal of the driving motor. The first determining submodule may be configured to determine a stroke cycle and an active power of the pumping unit based on the voltage signal and the current signal. The second determination submodule may be configured to determine a well surface indicator diagram based on a stroke cycle and active power of the pumping unit.
In one embodiment, the determining module is further configured to determine whether the shape of the downhole indicator diagram of the oil well is consistent with a preset indicator diagram shape, and in the case that the shape of the downhole indicator diagram of the oil well is inconsistent with the preset indicator diagram shape, determine that the oil pumping unit is in an idle pumping state, and the preset indicator diagram shape is the indicator diagram shape determined during standard oil production of the oil well.
The above-mentioned pumping unit intermittent pumping intelligent control device is used for executing the pumping unit intermittent pumping intelligent control method embodiment shown in fig. 1, and the technical principles, the solved technical problems and the generated technical effects of the two are similar, and it can be clearly understood by those skilled in the art that for convenience and conciseness of description, the specific working process and related description of the pumping unit intermittent pumping intelligent control device can refer to the content described in the pumping unit intermittent pumping intelligent control method embodiment, and the description is omitted here.
It will be understood by those skilled in the art that all or part of the flow of the method according to the above-described embodiment may be implemented by a computer program, which may be stored in a computer-readable storage medium and used to implement the steps of the above-described embodiments of the method when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying said computer program code, media, usb disk, removable hard disk, magnetic diskette, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunication signals, software distribution media, etc. It should be noted that the computer readable storage medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable storage media that does not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
Furthermore, the invention also provides electronic equipment. In an embodiment of the electronic device according to the present invention, the electronic device includes a processor and a storage device, the storage device may be configured to store a program for executing the pumping unit intermittent intelligent control method of the above-mentioned method embodiment, and the processor may be configured to execute the program in the storage device, where the program includes, but is not limited to, a program for executing the pumping unit intermittent intelligent control method of the above-mentioned method embodiment. For convenience of explanation, only the parts related to the embodiments of the present invention are shown, and details of the specific techniques are not disclosed.
Further, the invention also provides a computer readable storage medium. In one computer-readable storage medium embodiment according to the present invention, the computer-readable storage medium may be configured to store a program for executing the pumping unit intermittent pumping intelligent control method of the above-mentioned method embodiment, and the program may be loaded and executed by a processor to implement the pumping unit intermittent pumping intelligent control method. For convenience of explanation, only the parts related to the embodiments of the present invention are shown, and details of the specific techniques are not disclosed. The computer readable storage medium may be a storage device formed by including various electronic devices, and optionally, the computer readable storage medium is a non-transitory computer readable storage medium in the embodiment of the present invention.
Further, it should be understood that, since the configuration of each module is only for explaining the functional units of the apparatus of the present invention, the corresponding physical devices of the modules may be the processor itself, or a part of software, a part of hardware, or a part of a combination of software and hardware in the processor. Thus, the number of individual modules in the figures is merely illustrative.
Those skilled in the art will appreciate that the various modules in the apparatus may be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solutions to deviate from the principle 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 in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the 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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| CN202111665837.4A CN114382447A (en) | 2021-12-31 | 2021-12-31 | Intelligent control method and device for intermittent pumping of pumping unit |
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Cited By (1)
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| CN116624131A (en) * | 2023-07-24 | 2023-08-22 | 北京汉诺威自控技术有限公司 | Intelligent control method, device and equipment for oil pumping unit and storage medium |
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