CN203773281U - Oil pumping machine intelligent control system based on optimum jig frequency identification - Google Patents
Oil pumping machine intelligent control system based on optimum jig frequency identification Download PDFInfo
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- CN203773281U CN203773281U CN201420154508.2U CN201420154508U CN203773281U CN 203773281 U CN203773281 U CN 203773281U CN 201420154508 U CN201420154508 U CN 201420154508U CN 203773281 U CN203773281 U CN 203773281U
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- oil pumping
- pumping machine
- intelligent control
- intelligent
- pumping unit
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Abstract
The utility model relates to an oil pumping machine intelligent control system based on optimum jig frequency identification. The oil pumping machine intelligent control system is composed of two portions, i.e., an intelligent system taking an oil pumping machine special-purpose frequency converter as a core and a bypass system. The input end and the output end of the oil pumping machine special-purpose frequency converter of the intelligent system are respectively connected with a circuit breaker and a contactor, and the bypass system comprises a power breaker, a contactor and an electrothermal relay. The oil pumping machine intelligent control system is characterized in that the intelligent system further comprises an intelligent control card and a DC reactor, the intelligent control card is an expansion card of the oil pumping machine special-purpose frequency converter, the hardware of the intelligent control card is a single-chip microcomputer system, and the intelligent control card exchange data with the oil pumping machine special-purpose frequency converter through a communication mode; the DC reactor is connected with the DC side of the oil pumping machine special-purpose frequency converter; and the output of the oil pumping machine special-purpose frequency converter and the bypass system are mutually electrically locked through the contactors. According to the utility model, the intelligent control card controls the frequency converter to run at a frequency corresponding to optimum jig frequency, closed loop control is performed on an oil pumping machine through the real-time detected change situation of jig frequency power consumption, the liquid supply under a well is tracked, the supply and the exploitation are balanced, the production and the efficiency are enhanced, energy is saved, and consumption is reduced.
Description
Technical field
The utility model relates to oil extraction control system field, is specifically related to the intelligent controlling system for beam-pumping unit based on optimum jig frequency identification.
Background technology
Traditional oil well flows into theory to be thought, sand face pressure is lower, and drawdown pressure is larger, and oilwell produced fluid amount is larger.So the lower pump of general oil well is to perforation top, stage casing even, causes that working fluid level is low, stream forces down, pump degree of filling is low, affects pump efficiency, production fluid amount and recovery ratio.A large amount of practice and research both at home and abroad shows, when stream pressure drop is low to moderate saturation pressure when following, gas can be separated from crude oil, forms oil gas phase mixed liquor or oil gas water mixed liquor, and liquid phase stream kinetic force is reduced, stratum osmotic resistance increase.When stream forces down in saturation pressure and reduces gradually, production fluid amount slows down to there is maximal value flex point from raising, and then reduces gradually.It is the minimum limit of bottomhole flowing pressure that oil well stream is pressed that the stream that production fluid amount maximum point is corresponding is pressed.When oil well is produced below minimum limit of bottomhole flowing pressure, power consumption can increase, and production fluid amount can decline.
The oil recovery present situation in oil field is that a large amount of producing wells is depressed work at the stream lower than minimum limit of bottomhole flowing pressure, and pump efficiency and system effectiveness are low, affect production fluid amount and recovery ratio, and output gas oil ratio is high, ties Que and shakes out serious.Solution mainly contains 2 points: one, adjust the lower pump degree of depth, control stream and be pressed in rational scope; Two, regulate swabbing parameter, control stream and be pressed in optimum value, improve pump degree of filling and pump efficiency, reach for adopting balance.
After sucker rod pump stroke, pump footpath and lower pump Depth determination, jig frequency is the key parameter that determines pump discharge opeing ability.When sand pressure is stablized, jig frequency is higher, and working fluid level is lower, pump degree of filling is lower, sand face pressure is lower, power consumption is higher.And production fluid amount and sand face pressure existence function relation, i.e. IPR curve, sand face pressure exists optimum value to make production fluid amount maximum.The optimum value of sand face pressure is relevant to the factors such as saturation pressure of sand pressure, oil-water ratio and oil, has time variation.The Based Intelligent Control of oil pumper is by perception underground working, determines that optimum jig frequency adapts with it, and follows the tracks of the automatic adjusting stroke frequency of variation of underground working, and oil well is worked all the time under optimum jig frequency, reaches supply and discharge balance and the maximized object of production fluid amount.
Because the real-time testing cost of production fluid amount is high, accuracy extreme difference, the control of current oil pumper is the detection of the detection based on merit figure and working fluid level mainly, to realize the control of permanent pump degree of filling and the control of perpetual motion liquid level.Owing to there is not definite relation in pump degree of filling and working fluid level and production fluid amount, so can only control weak effect by rule of thumb, also poor to the adaptability of different oil wells, be subject to the impact of sensor cost and stability, this technology is on the one hand failed large scale application always simultaneously.Such control can only be named closed-loop control, but not Based Intelligent Control.
Control program based on energy consumption of electrical machinery is because testing cost is low, and good stability, is the new direction of research in recent years.Very many owing to affecting the factor of energy consumption of electrical machinery, comprise and promote the ineffective energy consumptions such as the available energy dissipation of liquid and the loss of electric machine, mechanical drive loss, frictional dissipation, sucker rod deformation loss, hydraulic slip loss, generally believe that the quantitative relationship of setting up between oilwell produced fluid amount and energy consumption of electrical machinery is impossible, so most research is not all deeply gone down.
In the application of frequency converter on oil pumper, owing to there being electric phenomenon, and frequency converter is originally from storing and discharge this part energy, can cause DC side superpotential fault.Traditional solution has three kinds: the one, and the method for employing dynamic braking, consumes the energy that falls to generate electricity with resistance, and this mode cost is relatively low, but waste electric energy; The 2nd, feedback mode, the controllable rectifier bridge by feedback unit or four-quadrant frequency converter is by electric energy feedback electrical network, and this mode cost is very high, also more serious to the harmonic effects of electrical network, is not suitable for applying; The 3rd, adopt common DC bus mode, energy is passed to other load and use, this mode cost is low, also energy-conservation, but uses and have limitation in most occasion.
Utility model content
The utility model is the problem existing for prior art, a kind of intelligent controlling system for beam-pumping unit based on optimum jig frequency identification is provided, by detecting the instantaneous power of motor, calculate the jig frequency power consumption of oil pumper, and the power consumption that proposes first maximum production fluid jig frequency changes judgment criterion, the intelligence oil pumping that adopts software controlling technique and frequency conversion control technique to realize oil pumper is controlled, and reaches and increases production and improves productivity and energy-saving and cost-reducing object.
The technical solution of the utility model
A kind of intelligent controlling system for beam-pumping unit based on optimum jig frequency identification, by take intelligent system and bypath system two parts that special converter for pumping unit is core, form, the special converter for pumping unit input and output side of intelligent system is connecting circuit isolating switch and contactor respectively, bypath system comprises power circuit breaker, contactor and electrothermal relay, wherein: in intelligent system, also comprise intelligent control card and direct current reactor, and the expansion card that intelligent control card is special converter for pumping unit, its hardware is Single Chip Microcomputer (SCM) system, adopt communication modes swap data with special converter for pumping unit, direct current reactor is connected with the DC side of special converter for pumping unit, the output of special converter for pumping unit and bypath system are by contactor electrical interlocks.
System of the present utility model is in universal frequency converter, to implant intelligent control software, does not need additional any aboveground and downhole sensor, does not also need to input any raw data of oil pumper and oil well, can complete the self-adapting intelligent of oil pumper is controlled.Apply this technology make the intelligent control system of oil pumper with low cost, reliable and stable, increase production and improve productivity and energy conservation and consumption reduction effects significantly improves, solved the core difficult problem that oil well intelligent is controlled, have an extraordinary application value.
The built-in distinctive overvoltage of direct current regulator of special converter for pumping unit of the present utility model is controlled software engineering in addition, make frequency converter have the function of tracing motor rotation speed operation, the electric phenomenon that falls that can effectively suppress oil pumper, without braking and feedback component, can guarantee that frequency converter normally moves, make the cost of intelligent system compare further decline with adopting dynamic braking or regenerative braking, power savings is compared obvious raising with adopting braking resistor mode, system architecture is further simplified, and reliability further improves.
Accompanying drawing explanation
Accompanying drawing 1 is components of system as directed structure diagram of the present utility model.
In figure, 1-three-phase supply, 2-converter power supply isolating switch, 3-bypass supply isolating switch, 4-special converter for pumping unit, 5 intelligent control cards, 6-frequency converter output contactor, 7-frequency converter direct current reactor, 8-ground connection, 9-bypass contactor, 10-bypass electrothermal relay, the output of 11-motor, 12 – motor.
Specific embodiment
The embodiment that carries out installation test below by applicant in August, 2013 on the G04-10-20 rod-pumped well of Shengli Oil Field Gu Dong oil recovery factory one ore deposit one team is further illustrated.
1, original hole condition
G04-10-20 rod-pumped well is joined walking-beam pumping unit, and motor is the two power threephase asynchronouses of 18.5/11KW double speed, rated voltage 380V.2.2 beats/min of beam-pumping unit jig frequencies, 3 meters of strokes, pump footpath 44mm, pump is hung 1247m, suction inlet degree of depth 1267.36m, dark 1324m in oil reservoir.Beam-pumping unit jig frequency has been adjusted to minimum value, without lowering space.Working fluid level is low, and oil pump degree of filling is low.Sand face pressure is low, and crude oil deaeration is serious, poor fluidity.Oil well daily fluid production rate is low, and ton liquid unit consumption is high.
By reference to the accompanying drawings 1, what this embodiment adopted is 22KW oil pumper special intelligent frequency converter (model is V560-4T0220), configuration intelligent control card (model is APV-F301) and direct current reactor (model is DCL-0050).By take intelligent system and bypath system two parts that special converter for pumping unit is core, form.Intelligent system comprises special converter for pumping unit 4 intelligent control cards 5 and direct current reactor 7, special converter for pumping unit 4 input and output sides of intelligent system are connecting circuit isolating switch 2 and contactor 6 respectively, and bypath system comprises power circuit breaker 3, contactor 9 and electrothermal relay 10.Wherein: and intelligent control card 5 expansion card that is special converter for pumping unit, its hardware is Single Chip Microcomputer (SCM) system, adopts communication modes swap data, without I/O interface with special converter for pumping unit; Direct current reactor 7 is connected with the DC side of special converter for pumping unit.The output of special converter for pumping unit and bypath system, by contactor (6 and 9) electrical interlocks, are protected motor when the electrothermal relay 10 in bypath system moves for bypass, and intelligent system and bypath system all have power circuit breaker 2 and 3.
This system is to go forward side by side after line number Epidemiological Analysis by the each several part energy consumption modeling to pumping production system, has found the judgment criterion of optimum jig frequency.Optimum jig frequency is corresponding with the minimum limit of bottomhole flowing pressure that oil well flows into equation curve (IPR curve), thereby has realized the control of maximum production fluid amount.
Intelligent control card 5 is controlled the time that special converter for pumping unit 4 is set in 50Hz, 40Hz, each operation of 30Hz, 20Hz, and down-hole working fluid level is reached after stable state, records the stable state jig frequency power consumption of oil pumper when these characteristic frequency point operations, is designated as W
50, W
40, W
30, W
20.The frequency converter running frequency f that optimum jig frequency is corresponding
0can be asked for by the optimum jig frequency identification model of following formula:
f
0=10×(4W
20－11W
30＋10W
40－3W
50)／(W
20－3W
30＋3W
40－W
50)
Control oil pumper at f
0the time chien shih down-hole working fluid level that operation is set reaches after stable state, records corresponding jig frequency power consumption and is benchmark jig frequency power consumption set-point W
f0.Above process has completed the self study process of rod-pumped well.Self study process is by start and start by set date mode trigger first.
Thereafter jig frequency power consumption value is in real time surveyed once at interval for 10 minutes, and with the given power consumption comparison of benchmark, 0.5Hz frequency raises if bigger than normal, the 0.5Hz frequency that reduces less than normal, if quite running frequency is not adjusted, realize the real-Time Tracking Control to down-hole fluid supply capacity, frequency adjustment range is f
0± 5Hz.When frequency is adjusted, W
f0also can follow automatic adjustment, to adapt to the real-time fluctuation of minimum limit of bottomhole flowing pressure.
2, test process and result
Before this intelligent controlling system for beam-pumping unit is installed, day power consumption, daily fluid production rate to the oil well of power frequency operation is carried out to record, and adopt oil well integral test system to measure casing pressure and working fluid level.
Install after this intelligent controlling system for beam-pumping unit, by automatic change beam-pumping unit jig frequency, oil well is carried out to hole condition self study, automatic searching up till now optimum frequency converter running frequency is 22.5Hz, corresponding jig frequency is 1 time, after measuring jig frequency power consumption now and follow the tracks of down-hole fluid supply capacity and change automatic adjusting stroke frequency.Under intellectual status, stable operation was carried out survey record to the instrument with same and measuring method to day power consumption, daily fluid production rate, casing pressure and the working fluid level of oil well after three days.
According to well data, working fluid level and casing pressure, convert out sand face pressure, and according to day power consumption, daily fluid production rate calculate a ton liquid power consumption.Test result is as shown in the table.
Oil well condition test result deck watch when power frequency and intelligent operation
3, test result evaluation
This intelligent controlling system for beam-pumping unit is by dynamically adjusting motor speed, and good to the inhibition of falling generating operation mode of oil pumper, pumping-unit motor there will not be electric phenomenon, and frequency converter does not need to configure dynamic braking assembly or feedback unit just can reliability service.This technology can reduce equipment investment cost, can improve electric energy service efficiency again.This intelligent controlling system for beam-pumping unit of while adds feedback unit to the harmonic pollution of electrical network than common frequency converter to be reduced greatly.
This intelligent controlling system for beam-pumping unit is realized Based Intelligent Control by the energy consumption Changing Pattern of oil well production.Do not need additional any sensor, self study and the autotracking function Intelligent closed-loop that just can carry out automatic optimal, self-adaptation operating mode to oil well by self are controlled, optimizing is accurately followed the tracks of in time, it is the intelligent much progress of controlling of oil pumper, not only reduced testing cost, also the stability and the reliability that have improved system, oil well production remains on optimum condition.
Test result shows, the degree of filling of down-hole oil pump raising after intelligent operation, and working fluid level rises, and the working submergence of oil pump improves, and casing pressure reduces explanation crude oil deoxidation minimizing; Sand face pressure returns to more satisfactory state by lower value, and oil well daily fluid production rate raises 17.7% simultaneously, meets IPR production fluid rule; Day, power consumption declined 44.2% with a ton liquid unit consumption, and energy-saving effect is remarkable.
To sum up, this intelligent controlling system for beam-pumping unit is integrated detection, Based Intelligent Control and driving, simple in structure being easy to safeguarded, Based Intelligent Control is respond well, the consumption reduction that increases production and improves productivity is effective, can suppress motor and fall to generate electricity, and performance and price more in the past intelligent frequency-conversion system is improved largely, Installation and Debugging and maintenance are simplified greatly, are adapted at preferably promoting the use of in oil pump energy-saving and intellectualized reconstruction.
This intelligent controlling system for beam-pumping unit was done a large amount of test and applications at the oil well of long celebrating oil field, Shengli Oil Field, Daqing oil field and Yanchang Oilfield, the search result of optimum jig frequency is accurate, that repeatedly searches is reproducible, to the oil well of different well ' s conditions, all can adapt to well, increasing production and saving power successful, pump efficiency and system effectiveness obviously improve.The inhibition of generating electricity is good, and power savings specific energy consumption mode improves 5～10%.
Claims (1)
1. the intelligent controlling system for beam-pumping unit based on optimum jig frequency identification, by take intelligent system and bypath system two parts that special converter for pumping unit is core, form, the special converter for pumping unit input and output side of intelligent system is connecting circuit isolating switch and contactor respectively, bypath system comprises power circuit breaker, contactor and electrothermal relay, it is characterized in that: in intelligent system, also comprise intelligent control card and direct current reactor, and the expansion card that intelligent control card is special converter for pumping unit, its hardware is Single Chip Microcomputer (SCM) system, adopt communication modes swap data with special converter for pumping unit, direct current reactor is connected with the DC side of special converter for pumping unit, the output of special converter for pumping unit and bypath system are by contactor electrical interlocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154508.2U CN203773281U (en) | 2014-04-01 | 2014-04-01 | Oil pumping machine intelligent control system based on optimum jig frequency identification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154508.2U CN203773281U (en) | 2014-04-01 | 2014-04-01 | Oil pumping machine intelligent control system based on optimum jig frequency identification |
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| Publication Number | Publication Date |
|---|---|
| CN203773281U true CN203773281U (en) | 2014-08-13 |
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ID=51290449
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420154508.2U Expired - Fee Related CN203773281U (en) | 2014-04-01 | 2014-04-01 | Oil pumping machine intelligent control system based on optimum jig frequency identification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885367A (en) * | 2014-04-01 | 2014-06-25 | 东营东日电气有限公司 | Pumping unit intelligent control system and method based on optimal stroke frequency identification |
-
2014
- 2014-04-01 CN CN201420154508.2U patent/CN203773281U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885367A (en) * | 2014-04-01 | 2014-06-25 | 东营东日电气有限公司 | Pumping unit intelligent control system and method based on optimal stroke frequency identification |
| CN103885367B (en) * | 2014-04-01 | 2016-04-06 | 东营东日电气有限公司 | A kind of intelligent controlling system for beam-pumping unit based on optimum jig frequency identification and method |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20160401 |
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| CF01 | Termination of patent right due to non-payment of annual fee |