CN115596412A - Automatic pumping unit stroke frequency adjusting method based on continuous liquid production of pumping unit wellhead - Google Patents
Automatic pumping unit stroke frequency adjusting method based on continuous liquid production of pumping unit wellhead Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 109
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 109
- 238000005086 pumping Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000001133 acceleration Effects 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 5
- 208000019206 urinary tract infection Diseases 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims 2
- 239000003129 oil well Substances 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 8
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- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
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- 238000013021 overheating Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 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
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Abstract
The invention discloses an automatic adjusting method of stroke frequency of a pumping unit based on continuous liquid production of a wellhead of the pumping unit, which comprises the following steps: acquiring liquid production metering device to continuously acquire liquid production data of the oil pumping unit at each stroke; calculating the average value of the liquid production amount per unit time under the current well condition; calculating the average pump efficiency value of the current liquid production condition according to the average value of the liquid production quantity and the theoretical discharge capacity of the pump; and comparing the average pump efficiency value with a preset pump efficiency value to obtain a comparison result, and sending a rotating speed control instruction to a frequency converter according to the comparison result to adjust the stroke frequency of the oil pumping unit. The method realizes the accurate adjustment and calibration of the automatic adjustment stroke frequency of the pumping well, improves the system efficiency of the oil well, greatly reduces the production cost of the oil well and improves the economic benefit of oil production in the oil field.
Description
Technical Field
The invention relates to the technical field of oil field automatic control, in particular to a pumping unit jig frequency automatic adjusting method and system based on continuous liquid production of a pumping unit wellhead.
Background
At present, the pumping units used in domestic oil fields mostly adopt frequency converters to adjust stroke frequency, and the frequency converters are divided into manual stroke frequency adjustment and automatic stroke frequency adjustment in specific application, wherein the application of the automatic stroke frequency adjustment is very few, and most of reasons are that no reliable parameter reference exists.
The general index for measuring the optimal working state of the pumping unit is the oil well liquid production rate, the most widely applied technology in the current oil field is the indicator diagram oil measuring technology, but the ground indicator diagram oil measuring also has the defect of large error with the actually measured oil well liquid production rate. However, these methods have the characteristics of complicated calculation, slow operation and strong professional property, and bring difficulty to the online judgment of the reasonable stroke frequency of the variable-frequency speed-regulating pumping unit.
The application number is 201510213765.8, the invention name is an optimal stroke frequency process method suitable for an ultra-low permeability oil reservoir digital oil pumping unit, and judgment and adjustment on the stroke frequency of the oil pumping unit are disclosed; under the condition of ensuring the liquid production amount, the optimal stroke frequency can be automatically searched according to the liquid production amount of the oil well, the stroke frequency is adjusted to be minimum, the optimal working state is achieved, and automatic adjustment and remote manual adjustment of the stroke frequency are achieved. But has the following defects 1) because each stroke can not be ensured to generate the indicator diagram, the acquisition of the indicator diagram can not be ensured to be continuous and real-time, and the change of the liquid supply condition can not be responded to in time; 2) The calculation method is complex and has huge errors, including theoretical errors and work diagram errors; 3) Data communication and remote computation take a lot of time, and the optimal number of times of stroke cannot be judged quickly.
The invention discloses an oil pumping unit optimal stroke frequency adjusting method with the application number of 201810148573.7, and discloses an oil pumping unit optimal stroke frequency adjusting algorithm based on time sequence global search, which is implanted into an RTU (remote terminal unit) measurement and control unit of the existing digital oil pumping unit; the oil pumping unit optimal stroke frequency adjusting algorithm based on the time sequence global search comprises the following steps: step one, utilizing an electric power limiting technology to screen and determine a frequency conversion range allowed by a frequency converter, setting the maximum frequency of the oil pumping unit as an initial frequency, and gradually reducing the frequency for operation; the step has the function of avoiding the motor from being burnt out by the frequency converter in the automatic adjustment process of the stroke frequency of the oil pumping unit; acquiring suspension point load and displacement data of the oil pumping unit, calculating actual pump efficiency according to the acquired data, and storing the data by taking the product of the pump efficiency and the frequency as equivalent liquid production capacity instead of the actual liquid production capacity; the step has the functions of judging the size change trend of the liquid production amount under different stroke times and simplifying the calculation process; thirdly, quickly finding out the optimal reasonable number of strokes by adopting a time sequence global search method, and taking the motor frequency at the moment as the optimal base frequency; step four, the pumping unit is enabled to run at the optimal base frequency, and simultaneously enters a frequency fine-tuning stage, namely the equivalent liquid production capacity of the pumping unit under the current frequency is calculated when the pumping unit runs at one frequency each time, and is compared with the equivalent liquid production capacity of the previous running frequency, and the current running frequency is finely tuned at one frequency step according to the equivalent liquid production capacity and the frequency change trend; step five, repeatedly executing the step four, and circularly executing fine adjustment according to the step four until the motor frequency of the pumping unit fluctuates at a certain numerical value, wherein the numerical value is the motor frequency of the pumping unit corresponding to the optimal reasonable stroke frequency; step six, converting the frequency of the pumping unit obtained in the step five into the optimal stroke frequency of the pumping unit according to a motor rotating speed formula; and step seven, adjusting the stroke frequency of the oil pumping unit according to the optimal stroke frequency value of the oil pumping unit obtained in the step six. This application suffers from the following disadvantages: 1) The problem of overheating of the motor at low frequency cannot be solved, and electric energy is wasted; 2) The actual pump effect calculated by using the suspension point load and the displacement data of the oil pumping unit does not take the elastic deformation of the polish rod into consideration, so the error is large; 3) Frequency adjustment cannot adapt to real-time working condition changes.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the automatic stroke frequency adjusting method and the system of the pumping unit based on the continuous liquid production quantity of the wellhead of the pumping unit, so that the accurate adjustment and calibration of the automatic stroke frequency adjustment of the pumping unit well are realized, the system efficiency of the oil well is improved, the production cost of the oil well is greatly reduced, and the economic benefit of oil production of the oil field is improved.
In a first aspect, the invention provides a method for automatically adjusting the stroke frequency of a pumping unit based on the continuous liquid production of a wellhead of the pumping unit, which comprises the following steps:
acquiring liquid production quantity data of the oil pumping unit under each stroke continuously acquired by a liquid production metering device;
finding out the average value of the liquid production amount per unit time under the current well condition;
calculating the average pump efficiency value of the current liquid supply condition according to the average liquid production amount and the theoretical displacement of the pump;
and comparing the average pump efficiency value with a preset pump efficiency value to obtain a comparison result, and sending a rotating speed control instruction to a frequency converter according to the comparison result to adjust the stroke frequency of the oil pumping unit.
In a second aspect, the present invention provides an automatic adjustment system for stroke frequency of a pumping unit based on continuous liquid production at a wellhead of the pumping unit, comprising: a liquid production metering device, a processor and a frequency converter, wherein,
the liquid production metering device is used for acquiring liquid production data of the oil pumping unit at each stroke continuously and transmitting the liquid production data to the processor;
the processor receives the liquid production amount data, calculates the average value of the liquid production amount per unit time under the current well condition, calculates the average value of the pump efficiency of the current liquid supply condition according to the average value of the liquid production amount and the theoretical displacement of the pump, compares the average value of the pump efficiency with the preset pump efficiency to obtain a comparison result, and sends a control instruction to the frequency converter according to the comparison result;
and the frequency converter adjusts the rotating speed of the driving motor according to the control instruction so as to adjust the stroke frequency of the oil pumping unit.
The invention has the beneficial effects that:
the automatic adjustment method and the system for the stroke frequency of the pumping unit based on the continuous liquid production of the wellhead of the pumping unit realize the accurate adjustment and calibration of the automatic adjustment of the stroke frequency of the pumping unit well, improve the system efficiency of an oil well, greatly reduce the production cost of the oil well and improve the economic benefit of oil production of the oil field.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a flow chart illustrating a method for automatically adjusting stroke frequency of a pumping unit based on continuous fluid production at a wellhead according to a first embodiment of the present invention;
fig. 2 shows a block diagram of a system for automatically adjusting stroke frequency of a pumping unit based on continuous fluid production at a wellhead according to another embodiment of the present invention.
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 some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
As shown in fig. 1, a flow chart of a method for automatically adjusting stroke frequency of a pumping unit based on continuous fluid production at a wellhead of the pumping unit according to a first embodiment of the present invention is shown, and the method includes the following steps:
the liquid production metering device continuously collects liquid production data of the oil pumping unit at each stroke;
calculating the average value of the liquid production amount per unit time under the current well condition;
calculating the average pump efficiency value of the current liquid supply condition according to the average liquid production amount and the theoretical displacement of the pump;
and comparing the average pump efficiency value with a preset pump efficiency value to obtain a comparison result, and sending a rotating speed control instruction to the frequency converter according to the comparison result.
The preset pump efficiency is the basic optimum pump efficiency determined in advance by trial operation.
The basic optimal pump efficiency concrete calculation method comprises the following steps: the processor acquires the liquid production data of the pumping unit under different stroke times through the sensor, then obtains the stroke times corresponding to the optimal liquid production under the current well condition by establishing the corresponding relation between the liquid production and the specific stroke times of the pumping unit, and then the frequency converter takes the stroke times as the reference stroke times because the underground liquid supply of the pumping unit is changed frequently. Therefore, the liquid production of the pumping well is also changed, so that the speed regulation of the frequency converter is also changed according to the change of the actual liquid production, and the motor is driven in a variable-speed flexible mode in single-stroke operation.
During the trial run period, the oil pumping unit performs trial run for 60 stroke times in a large stroke time span range, wherein the liquid production metering device collects the liquid production amount under each stroke time and sends the liquid production amount corresponding to each stroke time to the processor. The processor is internally provided with a calculation relation between the liquid production amount and the stroke frequency, and the optimal pump efficiency can be calculated according to the liquid production amount data. The calculation method is as follows: calculating the pump efficiency according to the liquid production: η = Q Liquid for treating urinary tract infection /Q Theory of things X 100%, wherein eta is the deep well pump efficiency; the Q liquid is the actual yield (liter/60 stroke times) of the oil well; q is the theoretical displacement of the pump (liter/60 stroke), per strokeThe liquid production rate and pump efficiency of the well with 60 strokes have limit values under the condition of determination of oil pumping equipment such as a pumping unit, the value is only related to the liquid supply condition in the well and the special type of the oil pumping equipment, so the liquid production rate Q is determined every 60 times for the oil pumping equipment Liquid for treating urinary tract infection ＝Q Theory of things X eta =60 x A x Sy x n, wherein A is the sectional area of the oil well pump barrel; sy is the theoretical stroke of the pump cylinder; n is the average pumping efficiency, Q Liquid for treating urinary tract infection (24 hours) =1440 xAxSy × n, the relationship between the pump efficiency and the stroke frequency is constant under the condition of liquid supply, and the lower the stroke frequency is, the higher the pump efficiency is under the condition that the oil pumping equipment is fixed. During the trial run, the 24-hour liquid production amount under the fixed well condition is constant, the liquid production amount cannot be increased when the stroke frequency is increased, and therefore the optimal reasonable stroke frequency can be calculated, so that the processor controls the frequency converter to enable the pumping unit well to work at the optimal reasonable stroke frequency at any time in the actual adjusting process on the basis of the optimal reasonable stroke frequency.
The concrete method for comparing the average pump efficiency value with the preset pump efficiency to obtain a comparison result and sending the rotating speed control instruction to the frequency converter according to the comparison result comprises the following steps:
if the average value of the pump efficiency is larger than the preset pump efficiency, sending an acceleration control instruction to the frequency converter, wherein the acceleration control instruction is used for increasing the rotating speed of the driving motor so as to improve the stroke frequency of the oil pumping unit;
if the average pump efficiency value is smaller than the preset pump efficiency, sending a speed reduction control instruction to the frequency converter, wherein the speed reduction control instruction is used for reducing the rotating speed of the driving motor so as to reduce the stroke frequency of the pumping unit;
and if the average pump efficiency value is equal to the preset pump efficiency, sending a maintaining control instruction to the frequency converter, wherein the maintaining control instruction is used for maintaining the current rotating speed to drive the motor without adjusting the stroke frequency of the oil pumping unit.
For the speed in each impulse period, the frequency converter adopts a constant power driving mode, namely, when the output torque is increased, the angular speed is correspondingly reduced, and the purpose of real-time speed regulation in the period is achieved. The actual time consumed in each cycle is recorded and tracked by the processor, and the next stroke cycle is finely adjusted according to the given optimal reasonable stroke, so that the change of the stroke per minute floats within plus or minus two percent of the specified stroke, and the accuracy of the integral average stroke is ensured.
According to the automatic adjustment method for the stroke frequency of the pumping unit based on the continuous liquid production of the wellhead of the pumping unit, the liquid supply condition is judged through continuous collection of the liquid production of each stroke, the average value of the pump efficiency is calculated according to the average value of the liquid production, the comparison result is obtained by comparing the average value of the pump efficiency with the preset pump efficiency, the frequency converter is controlled according to the comparison result, and the frequency converter adjusts the rotating speed of a driving motor according to a control instruction so as to achieve the purpose of adjusting the stroke frequency. The average value of the liquid production amount is adopted to calculate the average value of the pump efficiency, and the obtained data is more accurate. The oil pumping unit is kept to operate at the best system efficiency on the basis of fully exerting the underground liquid production capacity, the rotating speed is adjusted in real time according to the change of the load in each stroke cycle, the best yield is guaranteed, meanwhile, the abrasion of the oil pumping unit to a mechanical part and the consumption of energy in the working process are greatly reduced, the production cost of an oil well is greatly reduced, and the economic benefit of oil production of the oil field is improved.
The method for automatically adjusting the stroke frequency of the pumping unit based on the continuous liquid production of the wellhead of the pumping unit provided by the embodiment of the invention has the following technical effects:
1) The method adopts high-precision wellhead continuous liquid production data instead of equivalent liquid production with large indicator diagram oil measurement error, so that the error is greatly reduced;
2) On the premise of ensuring the optimal yield, real-time speed regulation is realized in each pulse cycle, and the mechanical loss is effectively reduced;
3) The required data volume is greatly reduced, the calculation process is simple, and a large amount of calculation amount and memory space are saved;
4) The condition that the motor is overheated and even burnt out possibly in the process of adjusting the punching frequency is completely avoided;
5) The automatic adjustment frequency range is large, the operation process is stable, and the adjustment can be realized from 0.5 time/min to 12 times/min;
6) The speed is adjusted rapidly, the ideal stroke frequency can be reached by 3 to 5 stroke frequencies after the machine is started, and then the dynamic adjustment is carried out in real time;
7) The application range is wide, and the permanent magnet synchronous motor, the high slip asynchronous motor and the common asynchronous motor can be realized;
8) The problem of 'large horse pulls a small car' is perfectly solved, the motor efficiency is greatly improved, and therefore a motor with lower power can be selected to drive the pumping unit to operate;
9) The electric energy is saved, the reverse power generation is basically not generated, and the quality of the power grid is protected.
As shown in fig. 2, a schematic structural diagram of an automatic stroke frequency adjusting system of a pumping unit based on continuous liquid production at a wellhead of the pumping unit according to another embodiment of the present invention is shown, and the system includes: the device comprises a liquid production metering device, a processor and a frequency converter, wherein the liquid production metering device is used for acquiring liquid production data of the oil pumping unit at each stroke continuously and transmitting the liquid production data to the processor; the processor receives the liquid production data, calculates the average value of the liquid production per unit time under the current well condition, calculates the average value of the pump efficiency of the current liquid production condition according to the average value of the liquid production per unit time and the theoretical displacement of the pump, compares the average value of the pump efficiency with the preset pump efficiency to obtain a comparison result, and sends a control instruction to the frequency converter according to the comparison result; the frequency converter adjusts the rotating speed of the driving motor according to the control instruction so as to adjust the stroke frequency of the oil pumping unit. In this embodiment, the processor is a single chip.
The processor comprises an analysis module, wherein the analysis module is used for comparing the average pump efficiency value with a preset pump efficiency value to obtain a comparison result, and sending a control instruction to the frequency converter according to the comparison result, and the analysis module specifically comprises:
if the average value of the pump efficiency is larger than the preset pump efficiency, sending an acceleration control instruction to the frequency converter, wherein the acceleration control instruction is used for increasing the rotating speed of the driving motor so as to improve the stroke frequency of the oil pumping unit;
if the average value of the pump efficiency is smaller than the preset pump efficiency, sending a speed reduction control instruction to the frequency converter, wherein the speed reduction control instruction is used for reducing the rotating speed of the driving motor so as to reduce the stroke frequency of the oil pumping unit;
and if the average pump efficiency value is equal to the preset pump efficiency, sending a maintaining control instruction to the frequency converter, wherein the maintaining control instruction is used for maintaining the current rotating speed to drive the motor without adjusting the stroke frequency of the oil pumping unit.
For the speed in each impulse cycle, the frequency converter adopts a constant power driving mode, namely, when the output torque is increased, the angular speed is correspondingly reduced, and the purpose of real-time speed regulation in the cycle is achieved. The actual time consumed in each cycle is recorded and tracked by the processor, and the next stroke cycle is finely adjusted according to the given optimal reasonable stroke, so that the change of the stroke per minute floats within plus or minus two percent of the specified stroke, and the accuracy of the integral average stroke is ensured.
According to the automatic adjustment system for the stroke frequency of the pumping unit based on the continuous liquid production of the wellhead of the pumping unit, the liquid production of each stroke frequency is continuously collected through the liquid production metering sensor, the liquid production data are transmitted to the processor, the processor calculates the average value of the liquid production of unit time under the current well condition, the average value of pump efficiency is calculated according to the average value of the liquid production, the average value of the pump efficiency is compared with the preset pump efficiency to obtain a comparison result according to the average value of the pump efficiency, the frequency converter is controlled according to the comparison result, and the frequency converter adjusts the rotating speed of the driving motor according to a control instruction so as to achieve the purpose of adjusting the stroke frequency of the pumping unit. If the average value of the pump efficiency is larger than the preset pump efficiency, sending an acceleration control instruction to the frequency converter, wherein the acceleration control instruction is used for increasing the rotating speed of the driving motor so as to improve the stroke frequency of the oil pumping unit; if the average pump efficiency value is smaller than the preset pump efficiency, sending a speed reduction control instruction to the frequency converter, wherein the speed reduction control instruction is used for reducing the rotating speed of a driving motor of the pumping unit so as to reduce the stroke frequency; and if the average pump efficiency value is equal to the preset pump efficiency, sending a maintaining control instruction to the frequency converter, wherein the maintaining control instruction is used for maintaining the current rotating speed to drive the motor and not adjusting the stroke frequency of the oil pumping unit. The oil pumping unit is kept to operate at the best system efficiency on the basis of fully exerting the underground liquid production capacity, the rotating speed is adjusted in real time according to the change of the load in each stroke cycle, the best yield is guaranteed, meanwhile, the abrasion of the oil pumping unit to a mechanical part and the consumption of energy in the working process are greatly reduced, the production cost of an oil well is greatly reduced, and the economic benefit of oil production of the oil field is improved.
The method and the system for automatically adjusting the stroke frequency of the pumping unit based on the continuous liquid production of the wellhead of the pumping unit, provided by the embodiment of the invention, realize the accurate adjustment and calibration of the automatically adjusted stroke frequency of the pumping unit well, improve the system efficiency of an oil well, greatly reduce the production cost of the oil well and improve the economic benefit of oil production of the oil field.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. A pumping unit stroke frequency automatic regulating method based on continuous liquid production of a pumping unit well head is characterized by comprising the following steps:
acquiring liquid production quantity data of the oil pumping unit under each stroke continuously acquired by a liquid production metering device;
calculating the average value of the liquid production amount per unit time under the current well condition;
calculating the average pump efficiency value of the current liquid production condition according to the average value of the liquid production quantity and the theoretical discharge capacity of the pump;
and comparing the average pump efficiency value with a preset pump efficiency value to obtain a comparison result, and sending a rotating speed control instruction to a frequency converter according to the comparison result to adjust the stroke frequency of the oil pumping unit.
2. The method as claimed in claim 1, wherein the comparing the average value of the pump efficiency with a preset pump efficiency to obtain a comparison result, and the specific method for sending the rotation speed control command to the frequency converter according to the comparison result comprises:
if the average pump efficiency value is larger than the preset pump efficiency, sending an acceleration control instruction to the frequency converter, wherein the acceleration control instruction is used for increasing the rotating speed of the driving motor so as to improve the stroke frequency of the pumping unit;
if the average value of the pump efficiency is smaller than the preset pump efficiency, sending a speed reduction control instruction to the frequency converter, wherein the speed reduction control instruction is used for reducing the rotating speed of the driving motor so as to reduce the stroke frequency of the oil pumping unit;
and if the average pump efficiency value is equal to the preset pump efficiency, sending a maintaining control instruction to the frequency converter, wherein the maintaining control instruction is used for maintaining the current rotating speed to drive the motor without adjusting the stroke frequency of the oil pumping unit.
3. The method of claim 1, wherein the pump efficiency is calculated by the formula: η = Q Liquid for medical purpose /Q Theory of things X 100%, wherein eta is pump efficiency, Q Liquid for medical purpose For actual production of the well, Q Theory of things Is the theoretical displacement of the pump.
4. The method of claim 2, wherein the inverter drives the motor in a constant power manner.
5. The utility model provides a beam-pumping unit jig frequency automatic regulating system based on continuous liquid production volume of beam-pumping unit well head which characterized in that includes: a produced liquid metering device, a processor and a frequency converter, wherein,
the liquid production metering device is used for acquiring liquid production data of the pumping unit at each stroke continuously and transmitting the liquid production data to the processor;
the processor receives the liquid production amount data, calculates the average value of the liquid production amount per unit time under the current well condition, calculates the average value of the pump efficiency of the current liquid production condition according to the average value of the liquid production amount and the theoretical displacement of the pump, compares the average value of the pump efficiency with the preset pump efficiency to obtain a comparison result, and sends a control instruction to the frequency converter according to the comparison result;
and the frequency converter adjusts the rotating speed of the driving motor according to the control instruction so as to adjust the stroke frequency of the oil pumping unit.
6. The system of claim 5, wherein the processor includes an analysis module, the analysis module is configured to compare the average pump efficiency value with a preset pump efficiency value to obtain a comparison result, and issue a control command to the frequency converter according to the comparison result, and specifically includes:
if the average value of the pump efficiency is larger than the preset pump efficiency, sending an acceleration control instruction to the frequency converter, wherein the acceleration control instruction is used for increasing the rotating speed of the driving motor so as to improve the stroke frequency of the oil pumping unit;
if the average value of the pump efficiency is smaller than the preset pump efficiency, sending a speed reduction control instruction to the frequency converter, wherein the speed reduction control instruction is used for reducing the rotating speed of the driving motor so as to reduce the stroke frequency of the oil pumping unit;
and if the average pump efficiency value is equal to the preset pump efficiency, sending a maintaining control instruction to the frequency converter, wherein the maintaining control instruction is used for maintaining the current rotating speed to drive the motor without adjusting the stroke frequency of the oil pumping unit.
7. The system of claim 5, wherein the pump efficiency is calculated by the formula: η = Q Liquid for treating urinary tract infection /Q Theory of things X 100%, wherein eta is pump efficiency, Q Liquid for treating urinary tract infection For actual production of the well, Q Theory of things Is the theoretical displacement of the pump.
8. The system of claim 6, wherein the inverter drives the motor in a constant power manner.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117492406A (en) * | 2023-12-26 | 2024-02-02 | 深圳市中科智清新能源科技有限公司 | Remote control method, device and equipment for hydraulic pumping unit system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117492406A (en) * | 2023-12-26 | 2024-02-02 | 深圳市中科智清新能源科技有限公司 | Remote control method, device and equipment for hydraulic pumping unit system |
| CN117492406B (en) * | 2023-12-26 | 2024-03-29 | 深圳市中科智清新能源科技有限公司 | Remote control method, device and equipment for hydraulic pumping unit system |
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