CN1316593A - Electromagnetic pumping unit - Google Patents
Electromagnetic pumping unit Download PDFInfo
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- CN1316593A CN1316593A CN 01102844 CN01102844A CN1316593A CN 1316593 A CN1316593 A CN 1316593A CN 01102844 CN01102844 CN 01102844 CN 01102844 A CN01102844 A CN 01102844A CN 1316593 A CN1316593 A CN 1316593A
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- pumping unit
- stepping motor
- electromagnetic pumping
- seal ring
- unit according
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Abstract
A electromagnetic beam pumping unit is controlled by computerized close-loop control system and uses the linear stepping motor to drive the sucker rod without intermediate mechanical transfering structure. The electromagnetic beam pumping unit can select the optimum stroke length and stroke speed for different conditions of oil walls to keep the operation always in the best economic condition.
Description
At present, the oil recovery machiner that use in the oil field all adopts the pumping unit of mechanically operated beam pumping unit and no slide beam.It is slowed down through multi-stage gear by turning motor, converts straight line motion to by walking beam or chain etc., drives the sucker rod back and forth movement, realizes the oil pumping purpose.It has that kinetic characteristic is poor, mechanical efficiency is low, the degree of balance is poor, energy consumption height, volume heavily wait defective.The mechanical parts of these intermediate conversion mechanisms, complex structure, easily damaged parts are many, and long-term operation easily produces wearing and tearing and tired, causes various faults.
The purpose of this invention is to provide a kind of electromagnetic pumping unit.Electromagnetic pumping unit, the employing linear stepping motor drives, linear stepping motor is the drive unit that a kind of electromagnetic pulse signal is directly changed into the straight line step motion, its mover (secondary) directly connects sucker rod, press the given upper and lower displacement of step pitch of instruction by computer controlled system control linear stepping motor, drive sucker rod and move up and down, realize the oil pumping purpose.
The object of the present invention is achieved like this: the stator (elementary) of linear stepping motor is installed on the top of frame, the mover of linear stepping motor (secondary) lower end connects sucker rod, send electrical pulse sequence by computer controlled system, instruction linear stepping motor stator drives mover and moves up and down by the step pitch straight line.Electromagnetic pumping unit adopts the computer close-loop control system, hardware and software and peripheral sensors by configuration are formed Adaptable System, write the Adaptable System of special-purpose software according to all kinds of well datas, can be to the different data of various types of oil wells (as thin oil well, thick oil well, stripper, rich oil well etc.), select the number of strokes and the length of stroke of pumping unit the best, make pumping unit be in operation under the optimal economic state all the time.
Another characteristics of electromagnetic pumping unit of the present invention are: the gas balance controllable system of being made up of gas bag and two compensating cylinders and air supplying pump.Can regulate gas bag automatically to compensating cylinder exoergic, accumulation of energy, realize the transient equiliblium of pumping unit.According to the information of pulling force sensor, when pumping unit overloads, during the phenomenon of holddown, computer controlled system is an instruction stop, and sounds the alarm, and guarantees that pumping unit is in operation under the safe condition all the time,
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural principle schematic representation of the present invention.
Fig. 2 is the left view of Fig. 1 electromagnetic pumping unit.
Fig. 3 is the sectional drawing of the multistage soft seal device of compensating cylinder closed chamber.
Fig. 4 is the computer controlled system block diagram.
Among the figure 1, fixed base 2, electric control cubicle 3, telephone-moving cylinder 4, walking device 5, frame 6, air supplying pump 7, sucker rod 8, left compensating cylinder 9, right compensating cylinder 10, pulling force sensor 11, gas bag 12, linear stepping motor stator 13, linear stepping motor mover 14 compensating cylinder plungers, 15 link press spans, 16, first order seal ring, 17, second level seal ring.18, third level seal ring, 19, fourth stage seal ring 20, level V seal ring, 21, the 6th grade of seal ring, 22, the 7th grade of seal ring, 23, the 8th grade of seal ring 24, lubricating chamber 25, dust-proof seal ring 26, closed chamber.
In Fig. 1, the stator of linear stepping motor (12) is fixed on the cylinder body of left and right compensating cylinder (8), (9) and the top of the frame (5) that gas bag (11) is formed, and mover (13) below is connected with sucker rod (7) by pulling force sensor (10).Computer controlled system is sent the electrical pulse sequence signal, and the instruction mover moves up and down by step pitch, realizes the oil pumping purpose.
Frame (5) places on the slide of fixed base (1), during well workover, the bolt of lower base on the frame (5) is unclamped, the top is the road wheel of walking device (4) down, make frame (5) leave fixed base (1), start telephone-moving cylinder (3), frame (5) is moved behind the slide rail on the fixed base (1).Well workover finishes, and returns telephone-moving cylinder (3), and frame (5) resets, and lifts the road wheel of walking device (4), and frame (5) contact fixed base (1) is tightened the fixed base bolt.
Among the embodiment shown in Figure 2, the middle part of link press span (15) is fixed on the upper end of linear stepping motor mover (13), both sides are connected with two compensating cylinder plungers (14) upper end, the balanced controls of forming two compensating cylinders, the purpose of the two compensating cylinders of employing is to guarantee that mover (13) operates steadily.Gas bag (11) is formed the gas balance sysmte with two compensating cylinders (8), (9) and air supplying pump (6).Pumping unit at the volley, gas bag (11) is to compensating cylinder (8), (9) exoergic, accumulation of energy, realizes the balance purpose.
During pumping unit work, the stressed of upper and lower stroke is different.According to pumping unit polished rod load formula:
Maximum polished rod load P
Max=P
Oil+ P
Bar+ P
Moving
Minimum polished rod load P
Min=P
Bar-P
Moving
In the formula: P
Oil---the above oil column gravity of plunger;
P
Bar---the rod string self gravitation;
P
Moving---the dynamic load that suspension point is suffered.
When pumping unit was operated in upstroke, suspension point was a maximum load, and it is made up of the suffered dynamic load of the above oil column gravity+suspension point of rod string self gravitation+plunger.When down stroke, suspension point is negative load (rule of thumb formula estimation: P
Moving≈ 2/3P
MaxP
Oil+ P
Bar≈ 1/3P
MaxSo P
Bar-P
MovingBe negative value).For improving machine work efficient, balancing gravity must be set, the gravity of upper and lower stroke is equated.Formula of reduction according to active balance gravity: the effective gravity Q of balancer weight
Imitate=P
Max+ P
Min/ 2.Calculated equilibrium gravity or gas pressure are tried to achieve balance.It is controlling object that this machine adopts the power with linear stepping motor, need not calculate counterweight, and the power of onlying demand upper and lower stroke working procedure cathetus stepping motor equates, promptly reaches the purpose of balance.
The autobalance working principle of electromagnetic pumping unit of the present invention is: during upstroke, linear stepping motor stator (12) is to the suction pulling sucker rod of mover (13), the Pneumatic pipe cleaner piping that gas bag (11) stores, the thrust (being equilibrant) that produces to the inflation of the cavity of resorption of left and right compensating cylinder (8), (9) is drawn and is pushed away sucker rod and balance cylinder plug to top offset, finishes upstroke work.During down stroke, linear stepping motor stator (12) is passed sucker rod and balance cylinder plug downwards the thrust and the rod string self gravitation of mover (13), and gas is sent back to gas bag (11), and storage recycles, and finishes down stroke work.Control the merit that upper and lower stroke procedure cathetus stepping motor is done, its power equates to be balance that mechanical efficiency is for the highest.For this reason, computer controlled system is handled, is judged the sampling of voltage, current sensor and the testing signal of control system, when upstroke power during greater than down stroke power, the computer controlled system instruction starts air supplying pump (6) and carries out tonifying Qi, increase air pressure when the power of up-down stroke equates, instruction air supplying pump (6) shuts down.When the power of upstroke during less than the power of down stroke, the air pressure regulator venting on the computer controlled system instruction unpack pipeline reduces air pressure and reaches balance.Thus, realize that the degree of balance of upper and lower stroke reaches 100% index, make pumping unit remain transient equiliblium, reach energy-conservation purpose.
Among the embodiment shown in Figure 3, eight grades of seal rings (16～23) in the closed chamber of the multistage soft seal device of compensating cylinder (26), adopt the Yx RunddichtringO, the minimum green diameter direction about 0.12～0.2mm in gap between seal ring (16～23) and the compensating cylinder plunger (14), when compensating cylinder was started working, the gas in the compensating cylinder cavity was exerted pressure to first order seal ring (16), and first order seal ring (16) is out of shape to diametric(al), the gap is eliminated, realize sealing.Remaining second to the 8th grade of seal ring (17～23) and gas barrier do not participate in seal operation.As process t
1After time, first order seal ring (16) is when increasing to critical gap because of wearing clearance, and first order seal ring (16) lost efficacy, and broke away from seal operation, and the first order seal ring (16) that gas pressure penetrates inefficacy immediately enters the second level.In like manner, second level seal ring (17) is subjected to air pressure, and seal ring (17) is to the distortion of direction radially, has eliminated the gap with plunger, participates in sealing, through t
2After time, second level seal ring (17) may wear to critical gap and lost efficacy, and disengaging work has third level seal ring (18) to take over again.Therefore, form one and have the reserve sealing system of constantly taking over.Moreover when the work of seal ring, all the other seal rings are in unloaded state, do not participate in sealing, so these seal rings only produce small wearing and tearing, and the speed of its wearing and tearing is much smaller than the seal ring of pressure-bearing work.And job specification t
1＞t
2＞t
3T
N～1＞t
nt
n=0.
Among Fig. 3 24 is lubricating chamber, the 25th, and dust-proof seal ring.
The working index of compensating cylinder sealing system is exactly the operating life of seal ring, and the operating life of this multistage soft seal device equals the working life sum of each seal ring (16～23).Native system adopts eight grades of sealings (the seal ring optimal number is according to practice decision flexibly), and its time limit design objective of always working was greater than 10000 hours.(365*24=8760 hour) changes whole seal rings if the corrective maintenance phase is decided to be 1 year, just equals balancing in situ cylinder soft seal position, is in continuously long-term failure-free operation.
Embodiment shown in Figure 4, it is the closed-loop computer control system block diagram of electromagnetic pumping unit of the present invention, it has detection, data, handle, judge, identification, self diagnosis and adaptive ability, in conjunction with peripheral pulling force sensor, current sensor, voltage transducer, the flow transducer of well head, pressure transducer, multiple sampling sensor such as viscosity transducer, according to dissimilar oil wells (thin oil well, thick oil well, stripper, the rich oil well) the computer hardware preparation that data are write special-purpose program software and adapted, form computer controlled system, this system with dissimilar oil wells as controlling object, from the various control scheme, choose a kind of optimum scheme, the frequency that drives linear stepping motor pulse sequence is regulated and control, regulated the stroke speed of pumping unit work, length of stroke.To stripper, instruction pumping unit working stroke by low speed progressively pick up speed or length of stroke progressively add long running by short, make the oil pumping flow reach maximum and do not take place again till the phenomenon that the pumping unit sky takes out.To the rich oil well, stroke speed or maximum length of stroke are accelerated in instruction, make the oil pumping flow reach maximum till linear stepping motor carrying maximum rated power.
The pulling force sensor of this machine (10) adopts Wireless transmission mode.
The computer controlled system of electromagnetic pumping unit is sampled, detects, is handled the signal data of pulling force sensor at random, when being judged as the generation of overload, holddown phenomenon, i.e. and instruction stop, and sound the alarm, guarantee the pumping unit safe operation.
Because a cover computer controlled system can be carried out the multimachine control of the different controlling schemes of many linear stepping motors simultaneously, so native system is carried out the multimachine control of a computer controlled system to pumping unit, two linear stepping motors of air supplying pump.
The electric control cubicle of this machine (2) is provided with temperature control system.
Owing to adopt such scheme; electromagnetic pumping unit of the present invention; have simple in structure, in light weight, functions such as inertia is little, motion is steady, reliable performance, mechanical efficiency height, energy-saving material-saving, dynamic protection, autobalance, control automatically, Adaptable System, be applicable to various types of oil wells.Electromagnetic pumping unit enters modern high-tech field with brand-new attitude, to promoting the oil production technology in oil field, improves the oil recovery economic benefit, is significant.
Claims (6)
1, a kind of electromagnetic pumping unit is by linear stepping motor driving, the control of computer close-loop control system.It is characterized in that: closed loop control system is formed the computer-based adaptive control system by the hardware of computer and the special-purpose software of writing according to different well datas and pulling force sensor, flow transducer, pressure transducer, voltage transducer, current sensor, viscosity transducer etc.
2, electromagnetic pumping unit according to claim 1 is characterized in that: linear stepping motor stator (elementary) is fixed on upper rack, and linear stepping motor mover (secondary) is connected with sucker rod by pulling force sensor.
3, electromagnetic pumping unit according to claim 1 is characterized in that: the column of frame is made up of two compensating cylinder cylinder bodies and gas bag and link.
4, electromagnetic pumping unit according to claim 1 is characterized in that: the closed chamber of compensating cylinder adopts multistage soft seal device, and it is made up of multi-stage sealed circle, lubricating chamber, dust-proof seal ring.Its top is dust-proof seal ring, and the middle part is that lubricating chamber, bottom are multi-stage sealed circle.
5, electromagnetic pumping unit according to claim 1, it is characterized in that: electric control cubicle is provided with temperature control system.
6, electromagnetic pumping unit according to claim 1 is characterized in that: pressure transducer adopts wireless transmission method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01102844 CN1287088C (en) | 2001-02-08 | 2001-02-08 | Electromagnetic pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01102844 CN1287088C (en) | 2001-02-08 | 2001-02-08 | Electromagnetic pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1316593A true CN1316593A (en) | 2001-10-10 |
| CN1287088C CN1287088C (en) | 2006-11-29 |
Family
ID=4653032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01102844 Expired - Fee Related CN1287088C (en) | 2001-02-08 | 2001-02-08 | Electromagnetic pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1287088C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182428A (en) * | 2011-04-12 | 2011-09-14 | 钟立国 | Reciprocating rack linear driving oil pumping unit |
| CN102192199A (en) * | 2010-09-07 | 2011-09-21 | 杨崇恩 | Power driven system and oil pumping unit applying same |
| CN102410000A (en) * | 2010-09-20 | 2012-04-11 | 辽宁浩方天成智能系统有限公司 | Static balance permanent magnetic stepper walking beam oil pumping machine |
| CN102583137A (en) * | 2011-01-13 | 2012-07-18 | 杨崇恩 | Gas-liquid kinetic energy driven lifting mechanism for elevator |
| CN113266313A (en) * | 2021-02-25 | 2021-08-17 | 大庆虹铭科技有限公司 | Direct-drive roller screw oil production device |
-
2001
- 2001-02-08 CN CN 01102844 patent/CN1287088C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192199A (en) * | 2010-09-07 | 2011-09-21 | 杨崇恩 | Power driven system and oil pumping unit applying same |
| CN102192199B (en) * | 2010-09-07 | 2014-05-21 | 杨崇恩 | Power driven system and oil pumping unit applying same |
| CN102410000A (en) * | 2010-09-20 | 2012-04-11 | 辽宁浩方天成智能系统有限公司 | Static balance permanent magnetic stepper walking beam oil pumping machine |
| CN102583137A (en) * | 2011-01-13 | 2012-07-18 | 杨崇恩 | Gas-liquid kinetic energy driven lifting mechanism for elevator |
| CN102583137B (en) * | 2011-01-13 | 2016-07-06 | 杨崇恩 | Gas-liquid kinetic energy driven lifting mechanism for elevator |
| CN102182428A (en) * | 2011-04-12 | 2011-09-14 | 钟立国 | Reciprocating rack linear driving oil pumping unit |
| CN113266313A (en) * | 2021-02-25 | 2021-08-17 | 大庆虹铭科技有限公司 | Direct-drive roller screw oil production device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1287088C (en) | 2006-11-29 |
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