CN106351618A - Anti-interference and energy-saving oil production controller with strong robustness - Google Patents
Anti-interference and energy-saving oil production controller with strong robustness Download PDFInfo
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- CN106351618A CN106351618A CN201610828125.2A CN201610828125A CN106351618A CN 106351618 A CN106351618 A CN 106351618A CN 201610828125 A CN201610828125 A CN 201610828125A CN 106351618 A CN106351618 A CN 106351618A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000005086 pumping Methods 0.000 claims abstract description 33
- 239000003129 oil well Substances 0.000 claims abstract description 24
- 238000011084 recovery Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 49
- 239000007788 liquid Substances 0.000 description 8
- 241000208340 Araliaceae Species 0.000 description 4
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 4
- 235000003140 Panax quinquefolius Nutrition 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 4
- 235000008434 ginseng Nutrition 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention provides an anti-interference and energy-saving oil production controller with strong robustness and belongs to the field of oil production equipment. A controller controls trigger signals of a power converter, controls start, stop and rotating speed of a switched reluctance motor and controls the swabbing rate of a pumping unit by periodically changing the switched reluctance motor, and non-stop periodical oil production is realized. The swabbing rate of the pumping unit is controlled by periodically changing the motor, and non-stop periodical oil production is realized. Non-stop periodical oil production is realized by periodically changing the swabbing rate of the pumping unit. Basically stable working fluid level and output of an oil well can be realized, the problems that the well freezes and gets stuck and the like are solved, and safe and efficient production is realized when mechanical oil production wells save energy and reduce consumption greatly.
Description
Technical field
The invention belongs to oil production equipment field, the anti-interference oil recovery energy-saving controller of specifically a kind of strong robustness.
Background technology
During oil exploitation, in order to ensure starting requirement and operationally having enough overload capacity of oil pumper,
The installed power of generally switched reluctance machines is larger, and its oil pumping jig frequency (oil pumping number of times in the unit interval) is higher, and switching magnetic-resistance
All with light running during motor normal work, thus result in oil pumper mate with the load of switched reluctance machines unreasonable, in addition
Oil well is gradually aging, and fluid supply capacity constantly declines, and oil pumping jig frequency is constant, various degrees in the work of oil pumper underloading
" pump is empty " and " dry tap " situation, the phenomenon of this " low load with strong power " not only causes the reduction of pumping unit power factor, oil pumping
Backlash increases, and wastes a large amount of electric energy, and so that pumping unit is lost and increase, and maintenance cost increases.
Chinese patent cn200620079003.x discloses a kind of Intelligent oil extraction controller, including the sensing being arranged in oil well
Device, the outfan of sensor is connected with the input of filtering and amplifying circuit, the outfan of filtering and amplifying circuit and analog digital conversion
The input of circuit is connected, and the outfan of analog to digital conversion circuit is connected with the input of central controller, central controller
Outfan be connected with oil pumper by relay.The present invention predicts the real work ginseng of oil well automatically by intelligent controller
Number, partly drags for or quits work when sky drags for when oil pumper is in relatively underloading, only when the accumulation of liquid in oil well can expire
During the condition that foot is continuously completely taken out again, ability startup optimization, so both ensured that oil pumper had higher degree of filling, reduced poorly efficient and nothing
Effect sky is taken out, and also makes oil pumper be changed into the intelligent operation of fast dynamic response from changeless mechanical movement simultaneously, thoroughly solves
Oil field sky takes out, inefficient, the problems such as flog a dead horse, reduce the mechanical wear of oil pumper and the purpose of energy saving.It is deposited
Deficiency be that this controller belongs to intermittent oil pumping, wait liquid level reach a certain amount of after take out again, liquid level just stops when not enough
Only wait.Such to take out problem very big, long mainly between the stopping time can cause holddown, be difficult to after having blocked process, need plus
The technology such as heat could continue to pump come the viscosity to reduce crude oil.Not reaching liquid level amount can be out of service, belongs to interruptedly supplying power.Disconnected
Continuous power supply technique is a kind of switched reluctance machines interruptedly supplying power method.Its control principle is exactly to be need in different periods according to system
Cutting off or the energising of controlling switch reluctance motor, making switched reluctance machines not need to stop power supply, thus realizing when output
Energy-conservation.Shortcoming: fall running status, rush of current because interrupted electric control mode makes switched reluctance machines be in not to stop to be in start and stop
There is injury to switched reluctance machines, also ratio is larger for the mechanical shock of pumping unit system simultaneously, rod-pumped well management difficulty is big, deposits
In certain potential safety hazard, after easily causing holddown during shutdown, winter coagulates pipeline.
Chinese patent application cn201210298110.1 discloses a kind of intelligent controlling system for beam-pumping unit.Its technical scheme
It is: include converter, Programmable Logic Controller and man machine interface, wherein Programmable Logic Controller connects converter, load sensing respectively
Device and proximity switch.The present invention can realize real-time monitoring operational factor according to the change of oil pumper load, and electrical quantity etc. is taken out
Oil machine polished rod is descending be obstructed when automatically adjust descending jig frequency, reach the function of speed automatic protection additionally it is possible to according to oil well carry
Lotus changes stepless adaptive speed regulation, and shows indicator card and the map of current of oil well.The deficiency that it exists is the resistance of detection polished rod
Oil pumper working condition can only be detected with number of times it is impossible to change oil pumper running parameter, realize the function of automatic protection.
Chinese patent cn201320598645.0 discloses a kind of beam pumping unit multiparameter feedback device for controlling dynamically.
Present invention is generally directed to the problems such as beam pumping unit difficulty in starting, high energy consumption, load impacting are big and develop, it is mainly by controlling
Device 1 processed, converter 2, chopper 3, transformer 4, catalyst i5, catalyst ii6, binding post 7, velocity sensor 8, load pass
Sensor 9, displacement transducer 10, electricity ginseng test sensor 11 form.The present invention is had reduction driving means and is installed with actuating device
Power, lifts the advantages of whole system operational efficiency, raising security of system.The deficiency that it exists is by load transducer 9
Gather oil pumper working condition with displacement transducer 10 it is impossible to change oil pumper running parameter, realize the function of protection.
Content of the invention
According to deficiency of the prior art above, it is an object of the invention to provide a kind of comprehensive monitoring oil pumper work ginseng
Number, the anti-interference oil recovery energy-saving controller of adaptable strong robustness.
The technical solution adopted for the present invention to solve the technical problems is: strong robustness anti-interference oil recovery energy-saving controller,
Including the switched reluctance machines connecting oil production machine, supply line's setting power inverter of switched reluctance machines and air switch are even
Connect DC power-supply system it is characterised in that: in the supply line between switched reluctance machines and power inverter setting electric current pass
Sensor, voltage sensor, power detector, switched reluctance machines arrange revolution detector, current sensor, voltage sensor,
Power detector and revolution detector connect processor by a/d transducer respectively, and the running parameter of switched reluctance machines is turned
Change voltage signal into, carry out analog digital conversion through a/d transducer, enter processor system and carry out data processing, storage and display；
Processor setting display, program storage, data storage, data recoverer and communication interface；
The outfan of processor connects the control end of power inverter；
Processor controls the trigger of power inverter, the startup of controlling switch reluctance motor, shutdown and rotating speed, passes through
Periodically-varied switched Reluctance Motor Control oil pumper pumping speed, realizes not outage period property and recovers the oil.
The data terminal of described processor connects rotation by a/d transducer and opens target flow rate meter, and rotation is opened target flow rate meter and is arranged on
On oil well flowline.
Described rotation is opened target flow rate meter and is separately positioned in the middle part of flowline in well head flowline and well.
The data terminal of described processor connects polished rod displacement transducer and load sensor with polish rod by a/d transducer.
Described periodically-varied switched Reluctance Motor Control oil pumper pumping speed refers to according to switched reluctance machines
Running parameter, pumping number of times in the different operating mode next cycle of adjustment.
Described periodically-varied switched Reluctance Motor Control oil pumper pumping speed refers to according to power supply peak period, adjustment
Pumping number of times in the fixed cycle of different power-on time sections.
Described communication interface adopts data carrier interface.Data carrier interface connecting communication cable.Or data carrier
Interface connects DC power-supply system, and the cable using DC power-supply system carries out signal transmission.
The anti-interference oil recovery energy-saving controller of strong robustness of the present invention is had the beneficial effect that to take out by periodically-varied
Oil machine pumping speed, realizes high-adaptability, self regulation, not outage period property oil recovery.It is a cycle one day 24 within 60 minutes
Individual cycle period, sets staged (rushing number to be gradually reduced) change in 30 minutes according to the actual daily fluid production rate of oil well in a cycle
Parameter efficient discharge opeing phase and 30 minutes variable element low speed convalescent period；In efficient 24 cycle periods of discharge opeing phase of 30 minutes variable elements
Accumulative theoretical displacement of pump guarantees that realizing pump efficiency reaches more than 50%；In 24 cycle periods of 30 minutes variable element low speed convalescent periods
The actual confession amount that accumulative theoretical displacement of pump is far below oil-well strata guarantees that oil well liquid level is thus capable of sufficiently recovering；Realize power oil well hydrodynamic
Face, yield basicly stable, do not occur freeze well, card well the problems such as, while mechanical oil well accompanied by substantial power saving realize
Safe and efficient production.
Brief description
The functional-block diagram of Fig. 1 present invention；
Specific embodiment
Below in conjunction with the accompanying drawings embodiments of the invention are described further:
Embodiment 1:
As shown in figure 1, strong robustness anti-interference oil recovery energy-saving controller, including the switched reluctance machines connecting oil production machine,
Switched reluctance machines supply line setting power inverter and air switch connect DC power-supply system, switched reluctance machines and
Setting current sensor, voltage sensor, power detector in supply line between power inverter, switched reluctance machines set
Put revolution detector, current sensor, voltage sensor, power detector and revolution detector pass through a/d transducer even respectively
Connect processor, the running parameter of switched reluctance machines is converted into voltage signal, carry out analog digital conversion through a/d transducer, enter
Enter processor system and carry out data processing, storage and display；
Processor setting display, program storage, data storage, data recoverer and communication interface；
The outfan of processor connects the control end of power inverter；
Processor controls the trigger of power inverter, the startup of controlling switch reluctance motor, shutdown and rotating speed, passes through
Periodically-varied switched Reluctance Motor Control oil pumper pumping speed, realizes not outage period property and recovers the oil.
Communication interface adopts data carrier interface.
Periodically-varied switched Reluctance Motor Control oil pumper pumping speed refers to the work ginseng according to switched reluctance machines
Number, pumping number of times in the different operating mode next cycle of adjustment.It can also be periodically-varied switched Reluctance Motor Control oil pumper
Pumping speed refers to according to power supply peak period, pumping number of times in the fixed cycle of the different power-on time section of adjustment.
By controlling the trigger of power inverter, the startup of controlling switch reluctance motor, shutdown and rotating speed, to adjust
Whole switched reluctance machines output, reduces iron loss and the copper loss of switched reluctance machines, thus reaching energy-saving purpose.Logical
Overvoltage, electric current and active power sensor are converted into the voltage signal of 0～5v the running parameter of switched reluctance machines, pass through
12 a/d transducer max197 carry out analog digital conversion, enter dsp microprocessor system and carry out data processing, storage and display, real
The operating of existing motor.According to the change of detected switched reluctance machines operating current and active power, real-time judge switchs
The magnitude of load of reluctance motor and operating mode.By periodically-varied oil pumper pumping speed, realize not outage period property and recover the oil.Both
60 minutes is one day 24 cycle period of a cycle, and in a cycle, the actual daily fluid production rate according to oil well sets 30 minutes
Staged (rushing number to be gradually reduced) variable element efficient discharge opeing phase and 30 minutes variable element low speed convalescent period；Variable element is efficient within 30 minutes
Accumulative theoretical displacement of pump in 24 cycle periods of discharge opeing phase guarantees that realizing pump efficiency reaches more than 50%；30 minutes variable element low speed
The actual confession amount that accumulative theoretical displacement of pump in 24 cycle periods of convalescent period is far below oil-well strata guarantees that oil well liquid level obtains
It is thus capable of sufficiently recovering.
Embodiment 2:
On the basis of embodiment 1, the data terminal of processor connects rotation by a/d transducer and opens target flow rate meter, and target is opened in rotation
Effusion meter is arranged on oil well flowline.Rotation is opened target flow rate meter and is separately positioned on flowline in well head flowline and well as needed
Middle part.
Rotation is opened target flow rate and is counted as well head amount of liquid change monitoring device, and the signal of telecommunication is sent to control device by this device
Logical analyses judging unit, logical analyses judging unit passes through the logical analyses to the signal of telecommunication accepting, and judges whether oil well is located
In normal operating condition, and will determine that result sends execution control unit to, realize oil pumper and do not shut down change work continuous parameters
Periodically recover the oil, it is stable, energy-saving principle passes through the actual Liquid output based on oil well for the controller not enough for conventional feed flow passive
Between the mode of taking out be changed into and periodically become the continuous high-efficient of running parameter and run, by optimizing pump footpath, stroke, rushing number, become and rush number life
Product time four parameter and energy consumption relation, and determine that oil pumper difference pumping speed rationally runs week according to the actual daily fluid production rate of oil well
Phase, on the premise of ensureing stable yield, realize mechanical oil well accompanied by substantial power saving.
Embodiment 3:
On the basis of embodiment 2, the data terminal of processor connects polished rod displacement transducer and polished rod by a/d transducer
Load transducer.
And gone out as other controlled quentity controlled variable by the operational factor increasing polished rod displacement transducer and load sensor with polish rod
The fuel-displaced data of oil pipe, together as closed loop control parameters, improves system robustness and quality robustness further.
Specific experiment proves to be capable of:
Main technical performance index:
Periodicity variable element continuously runs control；
It is applied to (motor 11kw-55kw) beam pumping unit of various model switched reluctance machines,
DC power-supply system after 380 volts of voltage of adaptation, 660 volts of conversion；
Oil pumper individual well energy consumption measure, 0.5 grade of accuracy class, 10 times of multiplying power；
Pumpingh well running current monitors (ammeter), 0.5 grade of accuracy class
Accumulative production run time (h) of record；
Intelligent operation and oil well test, the conversion of production operation discharge opeing pattern and reset；
Oil well variable element cycle of operation intellectualizing system optimizes runs software.
Power saving rate 35%-50%, raising pump efficiency to more than 50%.
Motor low-speed running air cooling system, control and protection.
Overload, phase shortage, open circuit protection and reset
Detection data:
Variable-frequency fan 24h power consumption 6-8 degree
Theoretical power consumption 47+8=55 degree
Fractional energy savings (140-55)/140=60%.
Claims (7)
1. strong robustness anti-interference oil recovery energy-saving controller, including the switched reluctance machines connecting oil production machine, switched reluctance machines
Supply line setting power inverter and air switch connect DC power-supply system it is characterised in that: switched reluctance machines and
Setting current sensor, voltage sensor, power detector in supply line between power inverter, switched reluctance machines set
Put revolution detector, current sensor, voltage sensor, power detector and revolution detector pass through a/d transducer even respectively
Connect processor, the running parameter of switched reluctance machines is converted into voltage signal, carry out analog digital conversion through a/d transducer, enter
Enter processor system and carry out data processing, storage and display；
Processor setting display, program storage, data storage, data recoverer and communication interface；
The outfan of processor connects the control end of power inverter；
Processor controls the trigger of power inverter, and the startup of controlling switch reluctance motor, shutdown and rotating speed, by the cycle
Sexually revise switched Reluctance Motor Control oil pumper pumping speed, realize not outage period property and recover the oil.
2. the anti-interference oil recovery energy-saving controller of strong robustness according to claim 1 it is characterised in that: described processor
Data terminal rotation connected by a/d transducer open target flow rate meter, rotation is opened target flow rate meter and is arranged on oil well flowline.
3. the anti-interference oil recovery energy-saving controller of strong robustness according to claim 2 it is characterised in that: target is opened in described rotation
Effusion meter is separately positioned in the middle part of flowline in well head flowline and well.
4. the anti-interference oil recovery energy-saving controller of strong robustness according to claim 1 and 2 it is characterised in that: described place
The data terminal of reason device connects polished rod displacement transducer and load sensor with polish rod by a/d transducer.
5. the anti-interference oil recovery energy-saving controller of strong robustness according to claim 1 it is characterised in that: described periodicity
Change switched Reluctance Motor Control oil pumper pumping speed refers to the running parameter according to switched reluctance machines, the different operating modes of adjustment
Pumping number of times in next cycle.
6. according to claim 1 or 5 strong robustness anti-interference oil recovery energy-saving controller it is characterised in that: described week
Phase sexually revises switched Reluctance Motor Control oil pumper pumping speed and refers to according to power supply peak period, the different power-on time section of adjustment
Pumping number of times in fixed cycle.
7. the anti-interference oil recovery energy-saving controller of strong robustness according to claim 1 it is characterised in that: described communication connects
Mouth adopts data carrier interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610828125.2A CN106351618A (en) | 2016-09-18 | 2016-09-18 | Anti-interference and energy-saving oil production controller with strong robustness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610828125.2A CN106351618A (en) | 2016-09-18 | 2016-09-18 | Anti-interference and energy-saving oil production controller with strong robustness |
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| Publication Number | Publication Date |
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| CN106351618A true CN106351618A (en) | 2017-01-25 |
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ID=57858573
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975106A (en) * | 2005-10-11 | 2007-06-06 | 普拉德研究及开发股份有限公司 | Wireless electromagnetic telemetry system and method for bottomhole assembly |
| CN101305187A (en) * | 2005-10-13 | 2008-11-12 | 井泵技术有限公司 | System and method for optimizing down-hole fluid yield |
| CN101534086A (en) * | 2009-04-10 | 2009-09-16 | 江苏大学 | Device and method for controlling switched reluctance motors for electric vehicles on basis of CPLD |
| CN102739133A (en) * | 2012-05-31 | 2012-10-17 | 南京银茂电气自动控制有限公司 | Dual-voltage control switch reluctance motor and dual-voltage control drive device thereof |
| CN203119818U (en) * | 2012-11-16 | 2013-08-07 | 淄博京科电气研究所 | Oil-pumping-unit dedicated switch reluctance motor speed regulation system |
| WO2015131353A1 (en) * | 2014-03-05 | 2015-09-11 | 中国石油天然气股份有限公司 | Pumping unit drive motor energy-saving control device system |
-
2016
- 2016-09-18 CN CN201610828125.2A patent/CN106351618A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975106A (en) * | 2005-10-11 | 2007-06-06 | 普拉德研究及开发股份有限公司 | Wireless electromagnetic telemetry system and method for bottomhole assembly |
| CN101305187A (en) * | 2005-10-13 | 2008-11-12 | 井泵技术有限公司 | System and method for optimizing down-hole fluid yield |
| CN101534086A (en) * | 2009-04-10 | 2009-09-16 | 江苏大学 | Device and method for controlling switched reluctance motors for electric vehicles on basis of CPLD |
| CN102739133A (en) * | 2012-05-31 | 2012-10-17 | 南京银茂电气自动控制有限公司 | Dual-voltage control switch reluctance motor and dual-voltage control drive device thereof |
| CN203119818U (en) * | 2012-11-16 | 2013-08-07 | 淄博京科电气研究所 | Oil-pumping-unit dedicated switch reluctance motor speed regulation system |
| WO2015131353A1 (en) * | 2014-03-05 | 2015-09-11 | 中国石油天然气股份有限公司 | Pumping unit drive motor energy-saving control device system |
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