CN111852415A - Method, system and equipment for controlling intermittent pumping operation of pumping unit - Google Patents
Method, system and equipment for controlling intermittent pumping operation of pumping unit Download PDFInfo
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- CN111852415A CN111852415A CN202010650383.2A CN202010650383A CN111852415A CN 111852415 A CN111852415 A CN 111852415A CN 202010650383 A CN202010650383 A CN 202010650383A CN 111852415 A CN111852415 A CN 111852415A
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- 238000005086 pumping Methods 0.000 title claims abstract description 239
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- 239000000725 suspension Substances 0.000 claims description 75
- 238000004590 computer program Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 abstract description 55
- 239000003129 oil well Substances 0.000 abstract description 6
- 239000010779 crude oil Substances 0.000 abstract description 4
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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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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Abstract
The invention relates to a method, a system and equipment for controlling intermittent pumping operation of a pumping unit, wherein the method comprises the following steps: acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit; determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency; if the change trend indicates that the pump fullness degree is reduced, reducing the running speed of the oil pumping unit according to a preset rule; when the pump fullness is smaller than or equal to the preset fullness threshold value and the running speed is smaller than or equal to the preset running speed, the pumping unit is controlled to stop running at regular time, and the running time and the running speed of the pumping unit are controlled according to specific conditions through automatic monitoring and judgment, so that the running state of the pumping unit can be matched with the crude oil liquid supply of an oil well to the maximum extent, and a good input-output ratio is ensured.
Description
Technical Field
The invention relates to the technical field of automatic control of pumping units, in particular to a method, a system and equipment for controlling intermittent pumping operation of a pumping unit.
Background
In the process of oil production, there is a working condition called "air pumping", which is often the case mainly in oil wells where the reservoir resources are nearly exhausted but have a certain exploitation value. Typical of such wells is the very low static pump submergence and poor oil delivery capability. The oil supply amount of the pumping unit can not meet the requirement of the pumping amount when the pumping unit continuously operates at the minimum operation speed (the minimum operation stroke frequency), the underground oil can be pumped to be dry as long as the pumping unit continuously operates for a plurality of times, the pumping unit must stop operating to wait for the recovery of the underground oil, then the operation of the pumping unit is started, and otherwise, the empty pumping display can occur. In order to avoid the inefficient energy consumption and mechanical wear associated with the pump-out phenomenon to the greatest possible extent, so-called interpump rows are usually produced for such wells, which are open-and-shut. In the actual production process of petroleum production, the intermediate pumping line is mostly the operation of starting and stopping the pumping unit regularly according to experience of operators. Typically, the pumping unit is stopped for hours to days and then put into operation for hours or days.
However, due to the manual subjective judgment, the specific underground working condition cannot be known accurately, the automation degree is relatively low, and a good input-output ratio cannot be ensured.
Disclosure of Invention
In view of the above, the present invention provides a method, a system and a device for controlling intermittent pumping operation of a pumping unit to improve the automatic control efficiency of the pumping unit and ensure a good input-output ratio.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the method for controlling the intermittent pumping operation of the pumping unit comprises the following steps:
acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit;
determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency;
if the change trend indicates that the pump fullness degree is reduced, reducing the running speed of the oil pumping unit according to a preset rule;
and when the pump fullness is smaller than or equal to a preset fullness threshold and the running speed is smaller than or equal to a preset running speed, controlling the pumping unit to stop running at regular time.
Optionally, the obtaining an indicator diagram of a preset number of strokes of the pumping unit includes:
respectively acquiring an upper stroke real-time load and a lower stroke real-time load of a suspension point of the pumping unit through a suspension point load measuring instrument, wherein the suspension point is a joint point of a horsehead of the pumping unit for hanging a deep well pump sucker rod;
Respectively acquiring the upper stroke real-time position and the lower stroke real-time position of the suspension point of the pumping unit by a swing angle measuring instrument;
acquiring an indicator diagram of a single stroke of the oil pumping unit according to the real-time position of the upper stroke, the real-time load of the upper stroke, the real-time position of the lower stroke and the real-time load of the lower stroke;
and acquiring a indicator diagram set of the preset number of times of stroke according to the preset number of times of stroke.
Optionally, the determining a pump fullness variation trend of the pumping unit according to the indicator diagram set of the preset number of strokes includes:
determining the fullness of each single stroke according to each single-stroke indicator diagram;
and determining the change trend of the pump fullness of the pumping unit according to the fullness of each single stroke.
Optionally, the determining the fullness of each single impulse according to each single impulse indicator diagram includes:
acquiring the piston stroke of the oil pumping unit during downstroke according to the indicator diagram;
acquiring the unloaded stroke of the pumping unit during the downstroke;
and determining the fullness of the single stroke according to the piston stroke and the unloading back stroke.
Optionally, the obtaining the piston stroke of the pumping unit during the downstroke according to the indicator diagram includes:
Determining the suspension point stroke of the pumping unit according to the swing angle measuring instrument and the equivalent swing radius of the suspension point;
when the minimum average load corresponding to the suspension point from the lowest point is increased to the maximum average load, acquiring the tensile stroke of the sucker rod corresponding to the suspension point;
and solving the difference between the suspension point stroke of the oil pumping unit and the tensile stroke of the oil pumping rod to obtain the piston stroke.
Optionally, the obtaining of the unloaded stroke during the down stroke of the pumping unit includes:
acquiring a corresponding walking beam angle when the load capacity of the suspension point is the same as the minimum average load capacity during a downstroke;
calculating the descending height of the suspension point corresponding to the angle of the walking beam, and recording the descending height as an unloading stroke;
and solving the difference between the suspension point stroke of the oil pumping unit and the unloading stroke to obtain the unloaded stroke.
Optionally, after the oil pumping unit is controlled to stop running at a fixed time, the method further comprises the following steps;
when the preset shutdown time is reached, restarting the pumping unit in a trial mode, and updating the indicator diagram set;
and if the updated indicator diagram shows that the pumping unit can continuously operate, maintaining the operation of the pumping unit, otherwise, controlling the pumping unit to stop operating at fixed time.
Optionally, the reducing the operation speed of the pumping unit includes:
and changing the rotating speed of the motor of the oil pumping unit through a variable frequency speed regulator so as to regulate the running speed of the oil pumping unit.
In another aspect, a system for controlling intermittent pumping operation of a pumping unit comprises:
the acquisition module is used for acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit;
the determining module is used for determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency;
the control module is used for reducing the running speed of the pumping unit according to a preset rule if the change trend indicates that the pump fullness degree is reduced; and when the pump fullness is smaller than or equal to a preset fullness threshold and the running speed is smaller than or equal to a preset running speed, controlling the pumping unit to stop running at regular time.
In another aspect, a control apparatus for intermittent pumping operation of a pumping unit includes: a processor, and a memory coupled to the processor;
the memory is used for storing a computer program, and the computer program is at least used for executing the control method of the pumping unit intermittent pumping operation;
the processor is used for calling and executing the computer program in the memory.
The beneficial effect of this application does:
the application provides a method, a system and equipment for controlling intermittent pumping operation of a pumping unit, wherein the method comprises the following steps: acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit; determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency; if the change trend indicates that the pump fullness degree is reduced, reducing the running speed of the oil pumping unit according to a preset rule; and when the pump fullness is smaller than or equal to the preset fullness threshold and the running speed is smaller than or equal to the preset running speed, controlling the pumping unit to stop running at regular time. By adopting the technical scheme, the running time and the running speed of the pumping unit are controlled according to specific conditions through automatic monitoring and judgment, so that the running state of the pumping unit can be matched with the crude oil supply of an oil well to the maximum extent, a good input-output ratio is ensured, and the running of the pumping unit is controlled and adjusted more reasonably while the automation level is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a pumping row control method between pumping units according to an embodiment of the present invention;
fig. 2 is a single stroke indicator diagram of the pumping unit according to the embodiment of the present invention;
FIG. 3 is a schematic representation of pump fullness versus operating speed for the preset schedule of FIG. 1;
fig. 4 is another schematic structural diagram of an automatic control process of the pumping unit according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of an inter-pumping unit pumping row control system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an inter-pumping unit pumping row control apparatus according to an embodiment of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic flow chart of a pumping row control method between pumping units according to an embodiment of the present invention, fig. 2 is a single-stroke indicator diagram of a pumping unit according to an embodiment of the present invention, and fig. 3 is a schematic diagram of a relationship between a pump fullness and an operating speed under a preset rule in fig. 1.
As shown in fig. 1, the method for controlling intermittent pumping operation of a pumping unit in this embodiment includes the following steps:
and S11, acquiring an indicator diagram set of the preset stroke frequency of the oil pumping unit.
Specifically, the upper stroke real-time load and the lower stroke real-time load of a suspension point of the oil pumping unit can be respectively obtained through a suspension point load measuring instrument, wherein the suspension point is a joint point of a horsehead suspension deep well pump sucker rod of the oil pumping unit; respectively acquiring the upper stroke real-time position and the lower stroke real-time position of a suspension point of the pumping unit through a swing angle measuring instrument; acquiring an indicator diagram of a single stroke of the pumping unit according to the real-time position of the upper stroke, the real-time load of the upper stroke, the real-time position of the lower stroke and the real-time load of the lower stroke; and acquiring a indicator diagram set of the preset number of times of stroke according to the preset number of times of stroke.
Firstly, a single-stroke indicator diagram is obtained, wherein the indicator diagram is a closed curve formed by loads corresponding to the positions of each point in a cycle (one stroke) of completing one up-down operation of a combination point (called a suspension point) of a pumping unit, which is hung on the mule head side of a walking beam, of a deep-well pump sucker rod when the pumping unit is in operation. As shown in fig. 2, the abscissa is the height difference between the suspension point from low to high (upstroke) and one cycle of reciprocation from high to low (downstroke); and the ordinate is load data corresponding to each position point in the process that the suspension point is from low to high and then from high to low. In a specific embodiment, two singlechips can be provided, the first singlechip is used for collecting the load of the suspension point of the pumping unit at each position, the second singlechip is used for analyzing and logically judging the well condition, the real-time load of the suspension point is obtained in real time through a suspension point load measuring instrument arranged at the suspension point, the real-time angle of the walking beam during operation is obtained through a walking beam swing angle measuring instrument, and then the position of the pumping unit during up-stroke and down-stroke operation is determined.
As shown in fig. 2, when the suspension point of the pumping unit starts to move upwards from the lowest position, the first single chip microcomputer collects the real-time position of the suspension point and the corresponding load through the beam swing angle measuring instrument when the suspension point rises for a certain distance until the suspension point rises to the highest point, so that a position-load array of the upper stroke of the suspension point of the pumping unit is formed; then, in the process that the suspension point moves downwards from the highest point, when the suspension point moves downwards for a certain distance, the first single chip microcomputer collects the actual position of the suspension point and the corresponding load, so that a position-load array of a lower stroke is obtained, and an indicator diagram of one stroke of the oil pumping unit is formed together according to the two position-load arrays of the upper stroke and the lower stroke. By analogy, the indicator diagram set with the preset number of impulses can be obtained. It should be noted that the number of indicator diagram sets collected may be set by the user according to the well condition, for example, the number of indicator diagrams may be 100 strokes.
And S12, determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency.
Specifically, a indicator diagram set of indicator diagrams of 100 impulses is obtained through the steps, and then, the fullness of each single impulse can be determined according to each single impulse indicator diagram; determining pump fullness variation of pumping unit according to the fullness of each single stroke Trend. And determining the fullness of each single impulse according to each single impulse indicator diagram may be: obtaining the piston stroke L of the down stroke of the oil pumping unit according to the indicator diagrams(ii) a Obtaining unloading rear stroke I of down stroke of oil pumping unitfra(ii) a Determining the fullness P of a single stroke based on the piston stroke and the unload strokefr. Wherein, the piston stroke when obtaining the down stroke of beam-pumping unit according to the indicator diagram specifically can be: determining the suspension point stroke L of the pumping unit through the swing angle measuring instrument and the equivalent swing radius of the suspension pointx(ii) a When the suspension point is increased from the minimum average load corresponding to the lowest point to the maximum average load, the tensile stroke I of the sucker rod corresponding to the suspension point is obtainedfrs(ii) a The difference between the suspension point stroke of the oil pumping unit and the stretching stroke of the oil pumping rod is obtained to obtain the piston stroke Ls. Obtaining unloading rear stroke I of down stroke of oil pumping unitfraSpecifically, the following may be: acquiring a corresponding walking beam angle when the load capacity of the suspension point is the same as the minimum average load capacity during the downstroke; calculating the descending height of the suspension point corresponding to the angle of the walking beam and recording the descending height as an unloading stroke Ld', make the suspension point stroke L of the pumping unitxAnd an unloading stroke Ld' Difference to get the unloaded Stroke Ifra。
In the single-stroke indicator diagram shown in fig. 2, a parallelogram shown by a dotted line is an ideal indicator diagram of the pumping unit, a closed curve shown by a solid line is an actual indicator diagram of the pumping unit, and a line segment from a to c along the direction of an arrow is load data when a suspension point is excessive from a lowest point to a highest point; and the line segment which is transited from the point c to the point a along the arrow through the points d and d' is load data which is transited from the highest point to the lowest point by the suspension point. In the figure, d' is a direct mapped data of pump fullness. That is, if d' gradually changes towards the direction of point d in a plurality of consecutive indicator diagram sets, it indicates that the fullness of the pumping unit is gradually increased; if d' is gradually close to the point a, the pump fullness of the pumping unit is gradually reduced. The specific position of the point d' in the middle of the straight line ad (namely the stroke of the pump) can be rapidly determined through the single chip microcomputer, so that the fullness of the pump of the oil extractor is judged:
pfr＝Ifra/LS
F in FIG. 2rThe maximum average load in the operation process of the oil pumping unit can be obtained by calculation according to mechanical parameters of the deep-well pump and is a known number;
Fdthe minimum average load is also obtained by calculation according to mechanical parameters of the deep-well pump and is a known number;
Lxand for the suspension point stroke of the pumping unit, the single chip microcomputer calculates the obtained arc length according to the maximum swing angle (from lowest to highest or from highest to lowest) of the pumping unit walking beam and the horizontal distance (equivalent swing radius of the suspension point of the walking beam) S from the supporting shaft of the walking beam to the suspension point, which are obtained by measuring and calculating the output signal of the walking beam swing angle sensor.
IfrsThe values obtained for the measurements were recorded as the sucker rod extension stroke: when the suspension point of the pumping unit starts to rise from the lowest point, the suspension point load is a gradually increasing process, in the process, the first single chip microcomputer measures each rising position of the suspension point and load data corresponding to the rising position at any time, and once the suspension point load data and the load data F are obtained through measurementrEqual to each other, immediately swings upwards from the lowest point to F according to the walking beamrThe angle of the position point of the same load data is calculated according to the angle to obtain the distance (height) of the suspension point moving upwards from the lowest point, and the distance is equal to the drawing stroke I of the sucker rod according to the parallelogram rule frsThus, the fullness of the pump is:
pfr＝Ifra/LS＝Ifra/(Lx-Ifrs)
to obtain IfraThe first single chip microcomputer only needs to find load data and F in a line segment from c to a through d' of the indicator diagramdThe equivalent beam angle of the point d' calculates the descending height L of the corresponding suspension point from the highest pointd', then there are:
Ifra＝Lx-Ld’
it can then be determined that the pump is full:
pfr＝Ifra/LS＝(Lx-Ld’)/(Lx-Ifrs)
the whole calculation process is automatically calculated and completed by the second single chip microcomputer, and the timeliness is very strong, so that the fullness of the pump at each moment can be obtained through each single-stroke indicator diagram, and the change trend of the pump fullness is obtained through the indicator diagram set of the preset stroke.
And S13, if the change trend indicates that the pump fullness degree is reduced, reducing the operation speed of the oil pumping unit according to a preset rule.
After the change trend is obtained, the state of the pump fullness can be judged, if the state shows that the pump fullness is reduced, the operation speed of the pumping unit is reduced according to a preset rule, the specific correlation between the operation speed and the pump fullness is shown in a figure 3, the relation between the pump fullness and the pump stroke frequency can be clearly judged, and the direct response of the pump stroke frequency is the operation speed of the pumping unit. The specific way of controlling the running speed of the pumping unit is to change the rotating speed of a motor of the pumping unit through a variable frequency speed regulator so as to regulate the running speed of the pumping unit.
And S14, controlling the pumping unit to stop running at fixed time when the pump fullness is less than or equal to the preset fullness threshold and the running speed is less than or equal to the preset running speed.
In the actual operation process, the system constantly monitors the change condition of the pump fullness, firstly, the system measures and obtains an indicator diagram of each stroke frequency (one up-and-down movement of a horse head of the pumping unit) of the pumping unit, and the single chip microcomputer automatically analyzes and obtains the real-time fullness of the pumping unit according to the indicator diagram obtained by measurement. The fullness of the pump with a plurality of continuous strokes is analyzed and compared (for example, an indicator diagram is continuously collected for 100 times), so that the trend of the change of the fullness of the pump in the operation process of the pumping unit can be obtained, and the adjustment direction of the operation condition of the pumping unit is determined. Typically, when a plurality of successive indicator diagrams of the pumping unit indicate that the fullness of the pump is gradually reduced, the control system of the present invention gradually reduces the operating speed of the pumping unit (reduces the number of strokes), and particularly, if the successive indicator diagrams of the pumping unit indicate that the fullness of the pump is continuously reduced to a minimum effective value, i.e., a preset fullness threshold value, and the operating speed (the number of strokes) of the pumping unit is also reduced to a minimum allowable speed, i.e., a preset operating speed, the system automatically stops the operation of the pumping unit and waits for the recovery of the oil in the well. And the stop operation at this moment is the timing stop operation, the time can be set by oneself, try again to start the pumping unit after reaching the stop time, and upgrade the indicator diagram set, if the indicator diagram after upgrading, show that the pumping unit can run continuously, keep the operation of the pumping unit, otherwise control the pumping unit to stop operation regularly. After a plurality of waiting time (such as 1 hour), the system can start the pumping unit by itself to try to run, and the recovery condition of the pump fullness is detected. If it is detected that the fullness is able to maintain the minimum operating condition, the system will continue to operate, otherwise the system will continue to stop. If multiple indicator diagrams of the pumping unit indicate that the pump fullness of the pumping unit is continuously increased, the control system of the present invention will gradually increase the operating speed of the pumping unit (increase the number of strokes) to achieve as high a capacity as possible. The above process, as shown in fig. 4, is a dynamic adjustment process that is continuous and repeated, so that the operation condition of the pumping unit can more closely track the change of the oil reservoir supply under the oil well, thereby obtaining more ideal capacity and optimal input-output ratio.
When the system monitors that the fullness of the oil pumping machine pump continuously decreases to the lowest effective fullness value and the stroke frequency of the oil pumping machine reaches the lowest value, the control system stops the operation of the oil pumping machine and waits for the working fluid level of the underground oil to recover to the data value capable of maintaining the basic fullness. In the process of waiting for the working fluid level to recover, the system can start the pumping unit to run for a plurality of strokes at regular time (can set the time manually) so as to obtain an indicator diagram, and then according to the fullness of the test pump, if the fullness can be recovered, the system can formally start the pumping unit to run, and can be connected with communication equipment and the like so that the running state of the pumping unit can be monitored in real time through a central control room.
The method for controlling intermittent pumping operation of the pumping unit provided by the embodiment comprises the following steps: acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit; determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency; if the change trend indicates that the pump fullness degree is reduced, reducing the running speed of the oil pumping unit according to a preset rule; and when the pump fullness is smaller than or equal to the preset fullness threshold and the running speed is smaller than or equal to the preset running speed, controlling the pumping unit to stop running at regular time. By adopting the technical scheme, the running time and the running speed of the pumping unit are controlled according to specific conditions through automatic monitoring and judgment, so that the running state of the pumping unit can be matched with the crude oil supply of an oil well to the maximum extent, a good input-output ratio is ensured, and the running of the pumping unit is controlled and adjusted more reasonably while the automation level is improved.
Fig. 5 is a schematic structural diagram of an inter-pumping unit pumping row control system according to an embodiment of the present invention.
As shown in fig. 5, the system for controlling pumping rows between pumping units according to this embodiment includes:
the acquisition module 10 is used for acquiring an indicator diagram set of a preset stroke frequency of the pumping unit;
the determining module 20 is configured to determine a pump fullness variation trend of the pumping unit according to a preset stroke indicator diagram set;
the control module 30 is used for reducing the running speed of the pumping unit according to a preset rule if the change trend indicates that the pump fullness degree is reduced; and when the pump fullness is smaller than or equal to the preset fullness threshold and the running speed is smaller than or equal to the preset running speed, controlling the pumping unit to stop running at regular time.
The control system of pumping row between beam-pumping units that this embodiment provided includes: acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit; determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency; if the change trend indicates that the pump fullness degree is reduced, reducing the running speed of the oil pumping unit according to a preset rule; and when the pump fullness is smaller than or equal to the preset fullness threshold and the running speed is smaller than or equal to the preset running speed, controlling the pumping unit to stop running at regular time. By adopting the technical scheme, the running time and the running speed of the pumping unit are controlled according to specific conditions through automatic monitoring and judgment, so that the running state of the pumping unit can be matched with the crude oil supply of an oil well to the maximum extent, a good input-output ratio is ensured, and the running of the pumping unit is controlled and adjusted more reasonably while the automation level is improved.
Further, the obtaining module 10 in this embodiment is specifically configured to:
respectively acquiring an upper stroke real-time load and a lower stroke real-time load of a suspension point of the pumping unit through a suspension point load measuring instrument, wherein the suspension point is a joint point of a horsehead of the pumping unit for hanging a deep well pump sucker rod;
respectively acquiring the upper stroke real-time position and the lower stroke real-time position of a suspension point of the pumping unit through a swing angle measuring instrument;
acquiring an indicator diagram of a single stroke of the pumping unit according to the real-time position of the upper stroke, the real-time load of the upper stroke, the real-time position of the lower stroke and the real-time load of the lower stroke;
and acquiring a indicator diagram set of the preset number of times of stroke according to the preset number of times of stroke.
Further, the determining module 20 in this embodiment is specifically configured to:
determining the fullness of each single stroke according to each single-stroke indicator diagram;
and determining the change trend of the pump fullness of the pumping unit according to the fullness of each single stroke.
Further, the determining module, specifically 20, in this embodiment is further configured to:
acquiring the piston stroke of the oil pumping unit during downstroke according to the indicator diagram;
acquiring the unloaded stroke of the pumping unit during the downstroke;
the fullness of a single stroke is determined based on the piston stroke and the unload back stroke.
Further, the determining module, specifically 20, in this embodiment is further configured to:
Determining the suspension point stroke of the pumping unit through a swing angle measuring instrument and the equivalent swing radius of the suspension point;
when the suspension point rises from the minimum average load corresponding to the lowest point to the maximum average load, acquiring the tensile stroke of the sucker rod corresponding to the suspension point;
and solving the difference between the suspension point stroke of the oil pumping unit and the stretching stroke of the oil pumping rod to obtain the piston stroke.
Further, the determining module, specifically 20, in this embodiment is further configured to:
acquiring a corresponding walking beam angle when the load capacity of the suspension point is the same as the minimum average load capacity during the downstroke;
calculating the descending height of the suspension point corresponding to the angle of the walking beam, and recording as an unloading stroke;
and (4) solving the difference between the suspension point stroke and the unloading stroke of the oil pumping unit to obtain the unloaded stroke.
Further, the present embodiment further includes a cycle starting module, configured to:
when the preset shutdown time is reached, the pumping unit is restarted, and the indicator diagram set is updated;
if the updated indicator diagram shows that the pumping unit can continuously operate, the operation of the pumping unit is kept, otherwise, the pumping unit is controlled to stop operating at fixed time.
Further, the control module in this embodiment is specifically configured to:
the rotating speed of the motor of the oil pumping unit is changed through the variable frequency speed regulator so as to regulate the running speed of the oil pumping unit.
Embodiments of the apparatus parts described above have been described in detail in the corresponding method parts, and therefore are not specifically described in the corresponding apparatus parts, but may be understood by referring to each other.
Fig. 6 is a schematic structural diagram of an inter-pumping unit pumping row control apparatus according to an embodiment of the present invention;
as shown in fig. 6, the control device for intermittent pumping operation of a pumping unit of this embodiment includes: a processor 100, and a memory 200 connected to the processor 100;
the memory 200 is used for storing a computer program, and the computer program is at least used for executing the control method of the pumping unit intermittent pumping operation of any one of the embodiments;
the processor 100 is used to call and execute the computer program in the memory 200.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for controlling intermittent pumping operation of a pumping unit is characterized by comprising the following steps:
acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit;
determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency;
if the change trend indicates that the pump fullness degree is reduced, reducing the running speed of the oil pumping unit according to a preset rule;
and when the pump fullness is smaller than or equal to a preset fullness threshold and the running speed is smaller than or equal to a preset running speed, controlling the pumping unit to stop running at regular time.
2. The method of claim 1, wherein the obtaining an indicator diagram of a preset number of strokes of the pumping unit comprises:
respectively acquiring an upper stroke real-time load and a lower stroke real-time load of a suspension point of the pumping unit through a suspension point load measuring instrument, wherein the suspension point is a joint point of a horsehead of the pumping unit for hanging a deep well pump sucker rod;
Respectively acquiring the upper stroke real-time position and the lower stroke real-time position of the suspension point of the pumping unit by a swing angle measuring instrument;
acquiring an indicator diagram of a single stroke of the oil pumping unit according to the real-time position of the upper stroke, the real-time load of the upper stroke, the real-time position of the lower stroke and the real-time load of the lower stroke;
and acquiring a indicator diagram set of the preset number of times of stroke according to the preset number of times of stroke.
3. The method of claim 2, wherein the determining a pump fullness variation trend of the pumping unit according to the indicator diagram set of the preset number of strokes comprises:
determining the fullness of each single stroke according to each single-stroke indicator diagram;
and determining the change trend of the pump fullness of the pumping unit according to the fullness of each single stroke.
4. The method of claim 3, wherein determining the fullness for each single burst from each of the single burst indicator diagrams comprises:
acquiring the piston stroke of the oil pumping unit during downstroke according to the indicator diagram;
acquiring the unloaded stroke of the pumping unit during the downstroke;
and determining the fullness of the single stroke according to the piston stroke and the unloading back stroke.
5. The method of claim 4, wherein the obtaining the piston stroke on the down stroke of the pumping unit according to the indicator diagram comprises:
determining the suspension point stroke of the pumping unit according to the swing angle measuring instrument and the equivalent swing radius of the suspension point;
when the minimum average load corresponding to the suspension point from the lowest point is increased to the maximum average load, acquiring the tensile stroke of the sucker rod corresponding to the suspension point;
and solving the difference between the suspension point stroke of the oil pumping unit and the tensile stroke of the oil pumping rod to obtain the piston stroke.
6. The method of claim 5, wherein said obtaining a post-unload stroke on a down-stroke of the pumping unit comprises:
acquiring a corresponding walking beam angle when the load capacity of the suspension point is the same as the minimum average load capacity during a downstroke;
calculating the descending height of the suspension point corresponding to the angle of the walking beam, and recording the descending height as an unloading stroke;
and solving the difference between the suspension point stroke of the oil pumping unit and the unloading stroke to obtain the unloaded stroke.
7. The method of claim 1, wherein after controlling the pumping unit to stop running periodically, further comprising;
when the preset shutdown time is reached, restarting the pumping unit in a trial mode, and updating the indicator diagram set;
And if the updated indicator diagram shows that the pumping unit can continuously operate, maintaining the operation of the pumping unit, otherwise, controlling the pumping unit to stop operating at fixed time.
8. The method of claim 1, wherein reducing the operating speed of the pumping unit comprises:
and changing the rotating speed of the motor of the oil pumping unit through a variable frequency speed regulator so as to regulate the running speed of the oil pumping unit.
9. A pumping row control system between pumping units, comprising:
the acquisition module is used for acquiring an indicator diagram set of a preset stroke frequency of the oil pumping unit;
the determining module is used for determining the pump fullness degree change trend of the oil pumping unit according to the indicator diagram set of the preset stroke frequency;
the control module is used for reducing the running speed of the pumping unit according to a preset rule if the change trend indicates that the pump fullness degree is reduced; and when the pump fullness is smaller than or equal to a preset fullness threshold and the running speed is smaller than or equal to a preset running speed, controlling the pumping unit to stop running at regular time.
10. The utility model provides a controlgear of pumping unit intermittent type pump operation which characterized in that includes: a processor, and a memory coupled to the processor;
The memory is used for storing a computer program, and the computer program is at least used for executing the control method of the pumping unit intermittent pumping operation of any one of claims 1-8;
the processor is used for calling and executing the computer program in the memory.
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| CN112412403A (en) * | 2020-11-20 | 2021-02-26 | 沈岩 | Automatic control method for intermittent pumping period amplitude swing operation of pumping unit by using disc motor |
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| CN114991727A (en) * | 2022-07-18 | 2022-09-02 | 石家庄爱科特科技开发有限公司 | Method for determining interval oil pumping parameters of oil pumping system |
| CN115749738A (en) * | 2021-09-03 | 2023-03-07 | 北京助创科技有限公司 | Method and device for monitoring operation rate of oil pumping unit |
| CN117005850A (en) * | 2023-09-04 | 2023-11-07 | 大庆石油管理局有限公司 | Novel tower crane overhead platform inspection device |
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| CN116838323B (en) * | 2023-08-04 | 2023-12-05 | 大庆石油管理局有限公司 | Tower type pumping unit safety protection method |
| CN117005850A (en) * | 2023-09-04 | 2023-11-07 | 大庆石油管理局有限公司 | Novel tower crane overhead platform inspection device |
| CN117005850B (en) * | 2023-09-04 | 2024-03-26 | 大庆石油管理局有限公司 | Tower crane overhead platform inspection device |
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