CN101240699A - Oilfield oil pumping machine energy-saving method and startup wheel - Google Patents
Oilfield oil pumping machine energy-saving method and startup wheel Download PDFInfo
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- CN101240699A CN101240699A CNA2007100636958A CN200710063695A CN101240699A CN 101240699 A CN101240699 A CN 101240699A CN A2007100636958 A CNA2007100636958 A CN A2007100636958A CN 200710063695 A CN200710063695 A CN 200710063695A CN 101240699 A CN101240699 A CN 101240699A
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Abstract
The present invention relates to electricity-saving technology of various beam type oil extractor in oil field. An energy-saving startup wheel of oil field oil extractor which can prolong starting time, decrease equipped capacitor and a method of energy-saving are disclosed. The startup wheel includes: adjustable mechanical limit twist member placed in the wheel case, non-rigid connection between wheel case and electrical machine shaft. Method: computing new electrical machine minimum theoreticl horsepower by using oil extractor static twist resistance, selecting average load ratio, selecting little capacity new electrical machine with high slip ratio, computing oil extractor power regulated by flywheel; computing startup wheel outer dimension, adjusting startup wheel limit-torsional moment;determining flywheel minimum inertia to design flywheel; correcting static twist resistance chart according to increased additional weight number on the beam, verifying average load ratio of new electrical machine. Because the invention adopts startup wheel, flywheel, beam balancing and selecting corresponding new electrical machine, electricity-saving ratio lies in 30-50% is obtained in economical, maximum, safe and reliable, and comparing with the present technology, it induces the installation power reducing greatly 1/3-1/4.
Description
Technical field
The invention belongs to the petroleum collection technical field, relate to the power-saving technique of the various beam pumping units in oil field.
Background technology
By the beam pumping unit that crank and connecting rod are formed, it is simple in structure reliable, for generally adopting at present domestic and international oil field.The heavy moving parts of beam pumping unit and dynamic moment of inertia are all very big.For guaranteeing that the oil pumping function starts the motor that the allocating power of having to is more much bigger than actual needs smoothly.On the other hand, also be characteristics because of crank-link mechanism itself, even eccentric balancing blocks is adjusted to the optimum position, be sent on the motor shaft turning round the resistance drop still very big.Therefore, when entering normal operation, the average load rate of motor is all very low usually, causes motor for a long time in the operation of poor efficiency district as shown in Figure 1, and power factor is also low, and the reactive current height causes the energy consumption significant wastage." low load with strong power " phenomenon that Here it is often says.The electric current I curve that motor is arranged among Fig. 1, power factor COS φ curve, electrical efficiency η curve, revolutional slip S curve, rate of load condensate P curve.
For a change " low load with strong power " this state was once released the soft hard squirrel-cage motor of large-slip motor alternative feature of characteristic the eighties in last century, but power savings and not obvious.
The nineties, release permagnetic synchronous motor again.The startability of this machine is than large-slip and common squirrel-cage motor height, and the electrical efficiency of permagnetic synchronous motor is subjected to the influence of payload in theory hardly.But in fact its power savings is still not ideal enough, and the oil pumper power saving rate majority that adopts permagnetic synchronous motor is about in the of 10%, and only individual cases meet or exceed 15%.
In recent years, on the oil field energy saving battle line, many speed and multistage specific type of electric machine have also occurred, these improvement all are the startabilities that is conceived to improve motor self, and installed capacity slightly reduces, and also obtains certain power savings.
Summary of the invention
The oil pumper of prior art is owing to start difficulty, people have to select for use heavy-duty motor, therefore electrical efficiency and power factor are low, cause energy consumption very big, the purpose of this invention is to provide a kind of energy conservation starting wheel and power-economizing method that can prolong start-up time, reduce the oil-field oil pumper of installed capacity.
In order to realize described purpose, a first aspect of the present invention provides a kind of power-economizing method of oil-field oil pumper, and step comprises:
Step a: quiet on the actual measurement oil pumper original motor axle turned round resistance, draws the quiet resistance figure that turns round of oil pumper, finds out the quiet largest peaks in the resistance of turning round, and is converted into new motor minimum theoretical power again;
Step b: according to new motor minimum theoretical power, select the average load rate of oil pumper new motor, select the small-power new motor of high-slip for use;
Step c: calculate the ability that pumping unit system is regulated oil pumper power, be used for obtaining the energy storage total amount of pumping unit system flywheel;
Steps d: according to the jig frequency of oil pumper, reductor speed ratio, brake wheel, big belt pulley size, to select the number of poles of new motor be 4～6 utmost points, calculates the appearance and size of starter cup, adjusts the limit torsional moment of starter cup, is used to control the real output of new motor;
Step e: change and the characteristic curve of new motor is determined the minimum rotation inertia of pumping unit system according to the actual power of oil pumper; According to mode of occupation design big belt pulley, brake wheel, be used to increase the dynamic moment of inertia of pumping unit system then;
Step f: will increase counterweight on the walking beam,,, be used for checking again the average load rate of new motor, reach energy-saving effect with this power of further revising selected new motor with the quiet resistance figure that turns round of counterweight quantity correction.
According to embodiments of the invention, the average load rate of described oil pumper new motor is chosen as 0.8～0.9, the maximum load rate is no more than 1.3.
According to embodiments of the invention, the ability of described adjusting oil pumper power is Δ W ≈ 2 * S * W, and motor slip ratio S is chosen as 5-8%, and W is expressed as the energy storage total amount of flywheel in the pumping unit system.
According to embodiments of the invention, utilize starter cup to prolong the start-up time of oil pumper, be used to reduce the installed capacity of motor.
According to embodiments of the invention, the limit torsional moment of described adjustment starter cup is to adjust the thrust of frictional disk to hub, the 1.2-1.3 that is used for the new motor electric current is adjusted to the new motor rated value promptly is to limit limit value of turning round of torsional moment to adjust to 1.2-1.3 times of new motor rated output power value starter cup doubly.
According to embodiments of the invention, the inspection of described starter cup state is the peep hole irradiation collimated light beam to rotating, utilize dodging frequently principle observes starter cup operate as normal is promptly: when the sign on the non-rubbing surface of frictional disk is mobile, starter cup is inner to slide, this moment, starter cup belonged to abnormal working position, then readjusted the limit value of turning round; Otherwise, then do not adjust the limit value of turning round.
In order to realize described purpose, a second aspect of the present invention provides a kind of and prolongs start-up time, reduces the energy conservation starting wheel of the oil-field oil pumper of installed capacity, comprising:
Be equipped with adjustable machinery limit in the hub inside of belt pulley and turn round parts, adopt non-rigid the connection between hub and the motor shaft.
According to embodiments of the invention, described adjustable machinery limit is turned round parts and is comprised:
Left frictional disk, self-lubricating bearing, right frictional disk, disk, spring, bolt, bolt, backplate, friction plate are arranged in hub;
A left side frictional disk and right frictional disk are contained on the feather key of motor shaft and are slidingly connected, and make left frictional disk and right frictional disk move at the motor shaft axial direction;
The inner casing tight fit of the shell of self-lubricating bearing and hub, self-lubricating bearing endoporus are equipped with left frictional disk and right frictional disk, and self-lubricating bearing and left frictional disk and right frictional disk are slidingly matched;
Nut is pressed on left frictional disk and right frictional disk on the hub by bolt, spring and disk; Backplate is fixedlyed connected with hub.
According to embodiments of the invention, preparation has the hole of adjustment and peep hole on the body of backplate, adjusts the hole and is used to regulate bolt; Peep hole is used to observe the starter cup rotary state.
According to embodiments of the invention, described adjustable machinery limit is turned round parts and is adopted the friction-disc limit to turn round parts, or the centrifugal limit of steel ball turns round parts, or the centrifugal limit of secter pat turns round parts, or the magneto limit is turned round parts.
Advantage of the present invention or beneficial effect:
The present invention changes the small belt pulley on the motor into starter cup of the present invention, since adopted starter cup of the present invention structure to prolong the start-up time of oil pumper, significantly reduced installed capacity, solved the problem that starts difficulty, the present invention can let go and adopt the increase beam balance to reduce the quiet absolute peak of turning round peak value thus, cooperate the rotary flywheel of pumping unit system to make the power output of new motor more become smooth, help improving the average load rate of new motor, for example: the quality that increases the oil pumper rotatable parts, strengthen the dynamic moment of inertia of oil pumper pivoting part exponentially, for example strengthen the dynamic moment of inertia of oil pumper brake wheel and big belt pulley, compared with prior art make installed power reduce by 1/3～1/4 significantly.Because power of motor reduces, average load rate is improved, average electrical efficient and average electrical power factor improve thereupon, reaches purpose of saving, and power saving rate is at 30-50%.Because the present invention adopts the ingenious cooperation of starter cup, flywheel, beam balance and the suitable new motor of selection, could be economically to greatest extent, safety can just obtain power savings.
The present invention uses the method for dodging the limit of the principle measurement frequently value of turning round easy to use, has solved the problem that the limit value of turning round is not easy to measure.
The present invention is used for the various beam pumping units in oil field, owing to utilize the present invention to do big change to original structure, thereby this power-saving technology also is applicable to the oil well that has put into operation.
Description of drawings
Fig. 1 is the characteristic curve of induction conductivity
Fig. 2 is the structural representation of embodiment of the invention oil pump energy-saving friction-type starter cup
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in detail, be to be noted that described embodiment only is intended to be convenient to the understanding of the present invention, and it is not played any qualification effect.
One. utilize starter cup of the present invention to make small machine also can start oil pumper
Shown in the structural representation of Fig. 2 oil pump energy-saving friction-type of the present invention starter cup:
Adjustable machinery limit in hub 1 is turned round parts 2 and is comprised: left frictional disk 21, self-lubricating bearing 22, motor shaft 23, right frictional disk 24, disk 25, spring 26, nut 27, bolt 28, backplate 29, first friction plate 30, second friction plate 31.
To starter cup of the present invention be installed on the motor shaft 23, the startup stage of oil pumper, starter cup is actually a limit and turns round device.When its normal operation, just become a common belt pulley.Starter cup has prolonged the start-up time of oil pumper, has cut down starting torque greatly, has improved the rate of load condensate of motor, makes motor in the operation of efficient district, the also corresponding raising of power factor.The hub 1 that motor shaft 23 is turned round parts 2 and starter cup by the adjustable limit in the starter cup joins.After the energising, motor shaft 23 reaches full gear＜1 second moment, and the resistance of turning round of oil pumper also is far longer than limit value of turning round that starter cup is set this moment.Like this, relative slip takes place with 1 of starter cup hub in motor shaft 23.Though motor shaft 23 is with constant moment of torsion full gear rotation, the hub 1 of starter cup just drives the oil pumper running lentamente.Along with oil pumper progressively quickens, turn round resistance and reduce gradually, until the limit value of turning round that resistance is equal to or less than starter cup of turning round of oil pumper, starter cup inside stops to skid, and startup stage, finish, and oil pumper has entered normal operation.This shows that the effect of starter cup is the start-up time that prolongs oil pumper.Therefore, as long as just the capacity of motor equal or be slightly larger than peak-peak quietly turn round resistance and be enough to start oil pumper.So just installed capacity can be tapered to common 1/3-1/4.
Friction slip makes the starter cup heating.The startup stage, have only 0.5 on the efficiency theory of starter cup.In other words, there is 50% motor power to change heat energy into.For example: if the motor power output is 11 kilowatts, start 30 kilograms of wheel loads, be controlled at start-up time about 20 seconds, then start temperature rise once, can be according to calculating above 10 ℃.Not frequent in view of the oil pumper startup, starter cup is very fast just to return to normal temperature.
Starter cup is cost with the frictional heating, with start-up time by extending to more than 20 second less than 1 second.And second half energy is stored in the revolution flywheel of pumping unit system.
Two. increase beam balance
Crank eccentric block mat is adjusted throw of crankshaft and is come the power of balanced sucker rod ascent stage and descending branch to distribute.The terminal counterweight of placing of walking beam can be offset the turn round resistance of part by sucker rod deadweight generation, be equivalent to alleviate the deadweight of sucker rod, compressed the power waveform of ascent stage and descending branch, reduced the quiet resistance peak value of turning round of oil pumper, when oil pumper started, the peak value of dynamically turning round resistance also decreased like this.
The weight of walking beam counterweight is advisable with the 1/4-1/2 of sucker rod deadweight.
Three. the dynamic moment of inertia that strengthens brake wheel and/or big belt pulley improves the ability of regulating power
The change of asynchronous machine rate of load condensate p causes that rotation speed n does rightabout slight variation (referring to Fig. 1).Revolution flywheel in the pumping unit system absorbs energy because of speed-raising when load reduces.Otherwise the revolution flywheel in the pumping unit system releases energy because of deceleration when load increases.Revolution flywheel in the pumping unit system has slowed down oil pumper strong power waxing and waning phenomenon in service.When the flywheel of starter cup and capacity dynamic moment of inertia is housed, small machine even can drive peak value and turn round the resistance oil pumper bigger than motor nominal torque.
Revolution flywheel in the pumping unit system also can be installed on two shaft extensions of the higher new motor of rotating speed.The accumulation of energy energy and the rotating speed of the revolution flywheel in the pumping unit system are quadratic relationship.
In the formula W be accumulation of energy energy (ox rice) J be dynamic moment of inertia (ox. meter per second
2), ω is an angular velocity.
Four. the oil pump energy-saving specific embodiment
1. motor shaft is rotated, quiet on the actual measurement motor shaft turned round resistance, with a plurality of quiet quiet resistance figure that turn round that oil pumper is drawn in resistance that turn round, finds out the quiet largest peaks in the resistance of turning round, and is converted into new motor minimum theoretical power according to mechanical design handbook.
2. because starter cup itself is exactly an overload protection arrangement, therefore, can tentatively select the power of new motor by higher average load rate 0.9, the maximum load rate is no more than 1.3.The fan-out capability that the revolution flywheel of pumping unit system suppresses power swing is Δ W, Δ W ≈ 2SW by formula, and W is the accumulation of energy energy of the revolution flywheel of pumping unit system, S is a revolutional slip.The high-slip new motor of selecting revolutional slip S=5-8% is for well.
3. the number of poles according to jig frequency, reductor speed ratio, big belt pulley size and the selected new motor of oil pumper is the 4-6 utmost point, calculate the outside dimension of starter cup, the 1.2-1.3 that the new motor electric current is adjusted to the new motor rated value doubly, and the 1.2-1.3 that the limit torsional moment of starter cup is adjusted to the new motor rated value doubly, utilize starter cup to prolong the start-up time of oil pumper, be used to reduce the installed capacity of motor.
4. determine the minimum inertia of flywheel according to the characteristic curve of the actual power change curve of oil pumper and motor, and turn round flywheel in the appearance and size design pumping unit system with reference to oil pumper and big belt pulley, if increase inertia only need add a flywheel, at first change brake wheel usually.
5. according to the quiet resistance figure that turns round of the counterweight quantity correction that increases on the walking beam.
6. the average load rate of examining motor again should be not less than 0.8, and the maximum load rate is no more than 1.3.Like this, compare with most oil pumpers of not transforming at present (the average electrical efficient of existing pumping-unit motor is 0.2-0.3), should be according to electrical efficiency shown in Figure 1 more than 0.5.Power saving rate will be greater than 40%, with
#10 oil pumpers are example, and a year amount of electricity saving will reach 50,000 degree.Power factor is inevitable also can be improved, and reactive current reduces, the also corresponding minimizing of line loss.And because power of motor reduces significantly, the voltage drop during startup also must reduce.In addition, the transformer that is complementary with it also should be cut down, perhaps several shared, this will save a no small long-term spending of expense for the oil field.
Five. the structure of energy conservation starting wheel
Adopt planar friction disc type or conical surface friction disc type starter cup among the embodiment, be equipped with adjustable machinery limit in hub 1 inside and turn round parts 2, friction-disc is non-rigid is connected in employing between hub 1 and the motor shaft 23.
Adjustable machinery limit is turned round parts 2 left frictional disk 21, self-lubricating bearing 22, right frictional disk 24, disk 25, spring 26, nut 27, bolt 28, backplate 29 in hub 1;
A left side frictional disk 21 and right frictional disk 24 are contained on the feather key of motor shaft 23 and are slidingly connected, and make left frictional disk 21 and right frictional disk 24 move at motor shaft 23 axial directions;
The inner casing tight fit of the shell of self-lubricating bearing 22 and hub 1, self-lubricating bearing 22 endoporus are equipped with left frictional disk 21 and right frictional disk 24, and self-lubricating bearing 22 is slidingly matched with left frictional disk 21 and right frictional disk 24;
Nut 27 is pressed on left frictional disk 21 and right frictional disk 24 on the hub 1 by bolt 28, spring 26 and disk 25; Backplate 29 is fixedlyed connected with hub 1.
Preparation has the hole D of adjustment and peep hole d on the body of backplate 29, adjusts hole D and is used to regulate bolt 28; Peep hole d is used to observe the starter cup rotary state.Adjusting hole D is the impact wrench hole of adjusting the limit value of turning round; Peep hole d, whether appropriate, with the starter cup of collimated light beam irradiation high speed rotary, observe by aperture if being used for monitoring the limit value of turning round, motionless if the mark on the right grinding disk is held, and then illustrates and do not slide.
Described adjustable machinery limit is turned round parts 2 and is adopted the friction-disc limit to turn round parts, or the centrifugal limit of steel ball turns round parts, or the centrifugal limit of secter pat turns round parts, or the magneto limit is turned round parts.Magneto cost height, on-the-spot inconvenience is handled after the demagnetization; The advantage of centrifugal (secter pat or steel ball) is a No Load Start, the starting current minimum; Though friction-disc is fully loaded the startup, because of power of motor significantly reduces, dash current is than much smaller before not transforming, and the limit value of turning round is adjusted, measures very convenient at the scene, and therefore, adjustable machinery limit is turned round this structure of parts 2 first-selected friction-disc among the embodiment.
The limit torsional moment of described adjustment starter cup is to adjust the thrust of left frictional disk 21 and 24 pairs of hubs 1 of right frictional disk, thereby has adjusted the limit value of turning round, and hinders when turning round of oil pumper to surpass the limit value of turning round, and grinding disk just produces relative slip with 1 of hub.The resistance of turning round of oil pumper reduces when being equal to or less than the limit value of turning round with the rotating speed increase, just stops to slide, and startup stage finishes.
The measurement of described starter cup state is the peep hole irradiation collimated light beam to rotating, utilize to dodge frequently principle and observe whether operate as normal of starter cup: when the sign on the non-rubbing surface of frictional disk is mobile, at this moment, starter cup is inner to slide, and then readjusts the limit value of turning round; Otherwise, then do not adjust the limit value of turning round.
Current value startup stage that the limit value of turning round being available or the suffered moment of torsion of measurement hub are demarcated.
In an embodiment of the present invention:
Characteristics of the present invention are: the efficient and the rate of load condensate of asynchronous machine are closely related.When rate of load condensate 0.5 when following, electrical efficiency and power factor all sharply descend.Therefore improving the motor load rate improves electrical efficiency and power factor exactly, reaches energy-conservation purpose.
The above; only be the specific embodiment among the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the present invention; can understand conversion or the replacement expected; all should be encompassed in of the present invention comprising within the scope, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (10)
1. the power-economizing method of an oil-field oil pumper is characterized in that, step comprises:
Step a: quiet on the actual measurement oil pumper original motor axle turned round resistance, draws the quiet resistance figure that turns round of oil pumper, finds out the quiet largest peaks in the resistance of turning round, and is converted into new motor minimum theoretical power again;
Step b: according to new motor minimum theoretical power, select the average load rate of oil pumper new motor, select the small-power new motor of high-slip for use;
Step c: calculate the ability that pumping unit system is regulated oil pumper power, be used for obtaining the energy storage total amount of pumping unit system revolution flywheel;
Steps d: according to the jig frequency of oil pumper, reductor speed ratio, brake wheel, big belt pulley size, select the number of poles of new motor and calculate the appearance and size of starter cup, adjust the limit torsional moment of starter cup, be used to control the real output of new motor;
Step e: change and the characteristic curve of new motor is determined the minimum inertia of pumping unit system according to the actual power of oil pumper; According to mode of occupation design big belt pulley, brake wheel, be used to increase the pumping unit system dynamic moment of inertia then;
Step f:,,, be used for checking again the average load rate of new motor with this power of further revising selected new motor with the quiet resistance figure that turns round of counterweight quantity correction with the counterweight that increases on the walking beam.
2. method according to claim 1 is characterized in that, the average load rate of described oil pumper new motor is chosen as 0.8～0.9, the maximum load rate is no more than 1.3.
3. method according to claim 1 is characterized in that, the ability of described adjusting oil pumper power is Δ W ≈ 2 * S * W, and motor slip ratio S is chosen as 5-8%, and W is expressed as the energy storage total amount of revolution flywheel in the pumping unit system.
4. method according to claim 1 is characterized in that, utilizes starter cup to prolong the start-up time of oil pumper, is used to reduce the installed capacity of motor.
5. method according to claim 1, it is characterized in that, the limit torsional moment of described adjustment starter cup is to adjust the thrust of frictional disk to hub, the 1.2-1.3 that is used for the new motor electric current is adjusted to the new motor rated value promptly is to limit limit value of turning round of torsional moment to adjust to 1.2-1.3 times of new motor rated output power value starter cup doubly.
6. method according to claim 5, it is characterized in that, the inspection of described starter cup state is the peep hole irradiation collimated light beam to rotating, utilize dodging frequently principle observes starter cup operate as normal is promptly: when the sign on the frictional disk non-rubbing surface is mobile, starter cup is inner to slide, this moment, starter cup belonged to abnormal working position, then readjusted the limit value of turning round; Otherwise, then do not adjust the limit value of turning round.
7. the energy conservation starting of oil pumper wheel is characterized in that, comprising:
Be equipped with adjustable limit in hub (1) inside of belt pulley and turn round parts (2), adopt non-rigid the connection between hub (1) and the motor shaft (23).
8. energy conservation starting wheel according to claim 7 is characterized in that described adjustable limit is turned round parts (2) and being comprised:
Left frictional disk (21), self-lubricating bearing (22), right frictional disk (24), disk (25), spring (26), nut (27), bolt (28), backplate (29), friction plate (30,31) are arranged in hub (1);
A left side frictional disk (21) and right frictional disk (24) are contained on the feather key of motor shaft (23) and are slidingly connected, and make left frictional disk (21) and right frictional disk (24) move at motor shaft (23) axial direction;
The inner casing tight fit of the shell of self-lubricating bearing (22) and hub (1), self-lubricating bearing (22) endoporus is equipped with left frictional disk (21) and right frictional disk (24), and self-lubricating bearing (22) is slidingly matched with left frictional disk (21) and right frictional disk (24);
Nut (27) is pressed on left frictional disk (21) and right frictional disk (24) on the hub (1) by bolt (28), spring (26) and disk (25); Backplate (29) is fixedlyed connected with hub (1).
9. energy conservation starting wheel according to claim 7 is characterized in that, also comprises: backplate (29), and preparation has adjustment hole (D) and peep hole (d) on the body of backplate (29), adjusts hole (D) and is used to regulate bolt (28); Peep hole (d) is used to observe the starter cup rotary state.
10. energy conservation starting according to claim 7 wheel is characterized in that, described adjustable machinery limit is turned round parts (2) and adopted the friction-disc limit to turn round parts, or the centrifugal limit of steel ball turns round parts, or the centrifugal limit of secter pat turns round parts, or the magneto limit is turned round parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100636958A CN101240699B (en) | 2007-02-07 | 2007-02-07 | Oilfield oil pumping machine energy-saving method and startup wheel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100636958A CN101240699B (en) | 2007-02-07 | 2007-02-07 | Oilfield oil pumping machine energy-saving method and startup wheel |
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| Publication Number | Publication Date |
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| CN101240699A true CN101240699A (en) | 2008-08-13 |
| CN101240699B CN101240699B (en) | 2011-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100636958A Expired - Fee Related CN101240699B (en) | 2007-02-07 | 2007-02-07 | Oilfield oil pumping machine energy-saving method and startup wheel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846747A (en) * | 2016-03-28 | 2016-08-10 | 中国石油天然气股份有限公司 | Constant power control system for oilfield walking beam type pumping-unit motor and control method thereof |
| CN108900115A (en) * | 2018-08-24 | 2018-11-27 | 国家电网有限公司 | Water-storage static frequency changer self-adaptive current control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2122227U (en) * | 1992-05-13 | 1992-11-18 | 高文立 | Energy-saving device for beam-pumping unit |
| CN2407158Y (en) * | 1999-10-08 | 2000-11-22 | 李金华 | Speed changing energy saving drive for oil sucker |
-
2007
- 2007-02-07 CN CN2007100636958A patent/CN101240699B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846747A (en) * | 2016-03-28 | 2016-08-10 | 中国石油天然气股份有限公司 | Constant power control system for oilfield walking beam type pumping-unit motor and control method thereof |
| CN105846747B (en) * | 2016-03-28 | 2018-05-04 | 中国石油天然气股份有限公司 | A kind of oil field beam pumping unit motor power limitation control system and its control method |
| CN108900115A (en) * | 2018-08-24 | 2018-11-27 | 国家电网有限公司 | Water-storage static frequency changer self-adaptive current control method |
| CN108900115B (en) * | 2018-08-24 | 2021-06-22 | 国家电网有限公司 | Self-adaptive current control method for pumped storage static frequency converter |
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| CN101240699B (en) | 2011-11-02 |
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