CN101532486B - Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system - Google Patents
Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system Download PDFInfo
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- CN101532486B CN101532486B CN2008100083916A CN200810008391A CN101532486B CN 101532486 B CN101532486 B CN 101532486B CN 2008100083916 A CN2008100083916 A CN 2008100083916A CN 200810008391 A CN200810008391 A CN 200810008391A CN 101532486 B CN101532486 B CN 101532486B
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- 238000005086 pumping Methods 0.000 title claims abstract description 140
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 239000003921 oil Substances 0.000 claims description 245
- 239000003129 oil well Substances 0.000 claims description 60
- 239000007788 liquid Substances 0.000 claims description 18
- 239000010720 hydraulic oil Substances 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/129—Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
- F04B47/04—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level the driving means incorporating fluid means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
- F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
Abstract
The invention discloses a hydraulic pump, an oil pumping unit, an oil pumping module and an oil pumping system. The hydraulic pump comprises a hydraulic cylinder body, a piston, a first hydraulic rod and a second hydraulic rod, wherein the first hydraulic rod and the second hydraulic rod are connected with the piston; and the second hydraulic rod and the first hydraulic rod extend out of the hydraulic cylinder body along opposite directions. The oil pumping unit comprises a hydraulic pump and a first oil pump which is connected on the first hydraulic rod. The oil pumping module comprises a control mechanism, a hydraulic drive mechanism and the oil pumping unit. The oil pumping system comprises one or a plurality of the oil pumping module(s). The oil outlet of each oil pumping module is connected with the main oil outlet by a pipe. The invention has the advantages of simple transmission, high transmission efficiency, simple structure, fewer parts and components, component-based design, flexible installation and configuration, high reliability and good security.
Description
Technical field
The present invention relates to a kind of oil extraction in oil field machinery, especially a kind of oil pumping system and be applied to oil pumping module in this oil pumping system.
Background technique
The oil extraction in oil field mode divides oil flow production and artificial lift to recover the oil, rod pumping system is the topmost artificial lift oil production method in domestic and international oil field, it mainly is comprised of pumping unit, sucker rod and oil well pump three parts, and wherein pumping unit is the topmost lifting equipment of rod pumping system.
According to whether having walking beam, pumping unit can be divided into beam pumping unit and without beam pumping unit.For beam pumping unit, such as most widely used " machine of kowtowing ", to drive lever reciprocating tractive sucker rod by motor by rocker-arm link to realize oil pumping, although this structure has satisfied industrial requirements to a certain extent, but the progress along with technology such as machinery, electrical equipment, it structurally has many defectives, utilizes weight to come balance oil pumping, the defective that inevitably have heaviness, consumes a large amount of steel such as needs; Along with stroke strengthens, weight sharply increases, and process for making is longer, and installment work is also complicated; The existing oil well pump of the up and down reciprocatingly stroke ratio of pumping unit is short, can't give full play to the efficient of existing oil well pump, if will with its coupling, then volume and power will increase greatly; In addition, the shortcoming that also has other in the structure of beam pumping unit, be mainly reflected in that to change rotatablely moving of motor the efficient of straight reciprocating motion into low, main cause is Belt Transmission Efficiency loss, the loss of speed reducer transmission efficiency, the loss of quadratic crank mechanism three supplementary bearing transmission efficiencies; Speed reducer moment of torsion increasing in direct ratio when strengthening stroke needs to change larger heavier speed reducer etc.
In order to address these problems, people have proposed different technological schemes, such as application number are to propose in 89217947.3 the patent application to utilize tubing string to do balance sysmte; Or be to propose mounting type is improved in 200620166023.0 the patent application such as application number; Be to propose oil hydraulic cylinder is improved in 92201875.8 the patent application such as application number perhaps; Or be in 200620020553.4 the patent application hydraulic pump structure to be improved such as application number; Or be the improvement of in 02155159.6 the patent application pumping unit power transmission mechanism being done such as application number; Or as application number be 200620119484.2, the improvement pumping unit done among the 200420031970.X, 200710052554.6 patent application etc.
Have again, sucker rod is long, moment stretching and compression occur easily, the distortion of this sucker rod has not only reduced the efficient of oil well pump, and so that sucker rod and oil pipe again and again bump and rub, in order to address this problem, also the someone has proposed corresponding technological scheme, is that disclosed signal feed back formula oil rig in the patent application of 02237843.X, application number are disclosed hydraulic oil pumping device etc. in 200610068939.7 the patent application such as application number.
Wherein, without beam pumping unit, be 99234396.8,99250803.7 etc. such as the patent No., higher than the machinery driving efficiency of beam pumping unit without beam pumping unit, but its complex structure, reliability is not high, and that uses at present is still few.
No matter be slide beam or without beam pumping unit, all exist the frictional loss between sucker rod and the oil pipe, and the sucker rod that each oil pumping all needs to reach hundreds of supreme kms promotes, promoting sucker rod also needs to consume a large amount of energy.
In present oil pumping system, comprise disclosed oil pumping system in above-mentioned each patent application, in order to realize the to-and-fro motion of piston in the oil hydraulic pump, need all in the power transmission mechanism that fuel reserve tank is arranged, relief valve and the parts that match with it, fuel reserve tank is used for replenishing the liquid of oil hydraulic pump, and relief valve then is for the pressure maximum that limits pipeline liquid.These parts have not only increased complexity and the energy consumption of system, and have reduced reliability and the Security of system.
And, each elephant of China enters high water-cut development period in succession at present, for guaranteeing the stable and high yields of crude oil, must increase the lifting rate of oil well, thereby the energy consumption cost of oil production system is sharply increased, energy consumption cost has become one of principal element that affects by cost for oil production, but the scheme that not yet effectively addresses this problem at present.
Summary of the invention
For the deficiencies in the prior art, the technical problem to be solved in the present invention is, a kind of oil pumping module and oil pumping system are provided, and in order to simplified structure, raise the efficiency, reduces energy consumption.
In order to solve above-mentioned technical problem, the invention provides a kind of oil pumping module, comprise control mechanism, hydraulic drive mechanism and oil pumping unit, it is characterized in that, described control mechanism, hydraulic drive mechanism and oil pumping unit all are positioned at underground main pipe, wherein, described oil pumping unit comprises oil hydraulic pump and the first oil well pump, described oil hydraulic pump comprises hydraulic cylinder, piston and the first hydraulic rod that is connected with described piston and the second hydraulic rod, described the first hydraulic rod and the second hydraulic rod oppositely stretch out described hydraulic cylinder mutually, and be provided with liquid entrance in two ends up and down at described oil hydraulic pump, the first hydraulic rod of described oil hydraulic pump is connected with the sucker rod of described the first oil well pump, and the oil outlet of described the first oil well pump links to each other with the oil outlet of oil pumping system by pipeline; Oil hydraulic pump in the described oil pumping unit up and down liquid entrance at two ends links to each other with described hydraulic drive mechanism by first and second hydraulic oil pipe respectively, described hydraulic drive mechanism links to each other with described control mechanism, control described hydraulic drive mechanism work by described control mechanism, control oil hydraulic pump in the described oil pumping unit by described hydraulic drive mechanism, drive described the first oil well pump by described oil hydraulic pump and carry out reciprocal oil pumping work.
A kind of improvement project as above-mentioned oil pumping unit also comprises the second oil well pump, and the second hydraulic rod of described oil hydraulic pump is connected with the sucker rod of described the second oil well pump; The oil outlet of described the second oil well pump links to each other with the oil outlet of oil pumping system by pipeline or links to each other with the oil outlet of described the first oil well pump.More specifically, described oil pumping unit also comprises limit switch, is used for the upper and lower stroke of restriction oil hydraulic pump.
Wherein, the described hydraulic drive mechanism in the above-mentioned oil pumping module comprises two-way pump and motor, and described motor is connected with described two-way pump by coupling, and described two-way pump is connected with first and second hydraulic oil pipe of oil hydraulic pump in the described oil pumping unit.More specifically, described two-way pump is gear pump; Described motor is alternating current servomotor.
The control circuit of described control mechanism for designing according to control task, comprise central processing unit (CPU), servo control unit and information acquisition unit etc., wherein, the servocontroller that described servo control unit is controlled alternating current servomotor for matching with alternating current servomotor, being used for and encoder etc., information acquisition unit generally comprises various sensors, such as current sensor, position transducer, position limit switch etc.Owing to the routine techniques that is designed to of this control mechanism, so do not repeat them here.
The present invention also provides a kind of oil pumping system, comprises one or more aforesaid oil pumping modules, and the oil outlet of described each oil pumping module links to each other with total oil outlet by pipeline, when described oil pumping module when being a plurality of, connects by link each other.
Oil pumping system provided by the present invention compared with prior art, transmission is simple, transmission efficiency is very high, and, there is not the sucker rod of hundreds of upper kms in native system, has not had the frictional loss of sucker rod and oil pipe, does not promote the energy loss of sucker rod yet, therefore than existing rod pumping system, energy consumption will be the reduction of the order of magnitude.
Oil pumping system provided by the present invention is simple in structure, and component are few, and whole system is in underground activities, is not subjected to the impact of ground environment, so reliability is high; And, because whole system causes personal injury in underground activities, can for the ground handling personnel, at present, security incident often occurs during existing pumping unit equipment in operation in the staff, is injured by a crashing object by pumping unit even causes death, and this oil pumping system has fundamentally been eliminated potential safety hazard, and Security is good.
Native system adopts the modularization design, and the assembly of varying number can be installed according to the demand of every mouthful of oil well discharge capacity, and the discharge capacity of each assembly can regulate, and therefore installs, configuration is all very flexible.
Oil pumping system provided by the present invention is flexible, and control strategy is flexible.Because what adopt is servo-system, can take neatly control strategy according to the needs of every mouthful of oil well, if any the oil well produce oil low, allow oil pumping system work off and on and be conducive to conserve energy.But because existing oil pumping system has potential safety hazard, intermittent pumping can bring larger potential safety hazard to the staff, and there is not this problem in native system, the mode of taking out between therefore can taking.
Below in conjunction with the drawings and specific embodiments technological scheme of the present invention is described in detail.
Description of drawings
Fig. 1 is oil pumping system embodiment's one of the present invention structural representation;
Fig. 2 is that oil pumping system one embodiment's of the present invention general structure is installed, the assembling schematic representation;
Fig. 3 is oil pumping system embodiment's two of the present invention structural representation;
Fig. 4 is the structural representation of oil pumping module among the oil pumping system embodiment three of the present invention;
Fig. 5 is the structural representation of total oil outlet among the oil pumping system embodiment three of the present invention;
Fig. 6 is oil pumping system embodiment's three of the present invention general structure schematic representation;
The limit-switch positions schematic representation of oil hydraulic pump in Fig. 7 oil pumping system of the present invention;
Fig. 8 is the structural representation of oil well pump of the present invention when being in upstroke;
Fig. 9 is the structural representation of oil well pump of the present invention when being in down stroke;
Figure 10 is the structural representation that oil pump outlet line and oil hydraulic pump oil outlet tube all are placed on main pipe inside in the oil pumping system of the present invention;
Figure 11 is the structural representation of oil pumping system of the present invention in main pipe;
Figure 12 is oil pumping system of the present invention another structural representation in main pipe;
Figure 13 is that oil pumping system of the present invention is at main pipe methods of internal fixation schematic representation;
Figure 14 is oil pumping system of the present invention another means of fixation schematic representation in main pipe.
Figure 15 is oil well pump motion speed schematic representation;
Figure 16 is the stressed schematic representation of the main oil pipe in the embodiment of the invention one;
Figure 17 is the stressed schematic representation of the main oil pipe in the embodiment of the invention two;
Figure 18 is the stressed schematic representation of the main oil pipe in the embodiment of the invention three.
Embodiment
Oil hydraulic pump provided by the invention comprises hydraulic cylinder, piston and the first hydraulic rod that is connected with piston, the second hydraulic rod, and described the second hydraulic rod and described the first hydraulic rod oppositely stretch out hydraulic cylinder.Be provided with liquid entrance in two ends up and down at described oil hydraulic pump, be connected with the hydraulic power driving mechanism by first and second hydraulic oil pipe respectively.
Because oil hydraulic pump of the present invention has two hydraulic rods that stretch out cylinder body, in the hydraulic circulation process, the total measurement (volume) of hydraulic pressure cavity remains unchanged, the amount of liquid that is used for circulation remains unchanged, and has omitted the liquid container that is used for liquid make-up in the prior art, and the pressure of liquid can be controlled by control mechanism in addition, the elements such as relief valve that are used for balancing liquid pressure have been omitted, therefore, simplified the structure of oil pumping system, transmission is simple; And each hydraulic rod all can connect an oil well pump, thereby pumping efficiency is improved greatly.
An oil hydraulic pump and one or two oil well pump consist of an oil pumping unit, an oil pumping unit is added control mechanism and oil pumping module of hydraulic drive mechanism composition, one or more oil pumping modules form an oil pumping system, described oil pumping system is modularized structure, simple in structure, installation, maintenance convenience, efficient is high, energy consumption is low, Security good.
Embodiment one
Be oil pumping system embodiment's one of the present invention structural representation referring to Fig. 1, the oil pumping system in the present embodiment is positioned at a main pipe A, and the underground petroleum B that enters by oil well is arranged at main pipe A bottom.Oil pumping system mainly comprises an oil pumping module, be control mechanism, hydraulic drive mechanism and an oil pumping unit, oil pumping unit in the present embodiment is comprised of an oil hydraulic pump and an oil well pump, control mechanism comprises CPU, servomotor controller, encoder and some sensors (such as current sensor, position transducer) and corresponding peripheral circuit, hydraulic drive mechanism comprises two-way pump and alternating current servomotor, and the alternating current servomotor here is corresponding with the servomotor controller in the control mechanism.Main pipe A is the fixed support part of whole system, and the component of whole system all are fixed on the main pipe, and main pipe is fastened on the lower end of main oil pipe, specifically as shown in Figure 1.
For easy for installation, the present invention is incorporated into the CPU in the control mechanism, servomotor controller and peripheral circuit etc. in the control box, be servo control box 310, the cable inlet A1 through main pipe is input to the system power supply of whole system from ground by cable, is used for providing electric energy.The motor encoder signaling line 311 of AC servo motor 320 and motor supply lines 312 are connected on the servo control box 310, cable inlet A1 through main pipe is linked in the servo control box power supply from ground by cable, and the power end of AC servo motor 320 is connected on the three phase mains of servo control box output.CPU according to the control strategy of setting (such as motor with certain constant rotational speed rotation) whenever at regular intervals (such as 60 microseconds) detect position and the electric current of motor, detect the position signal of motor by motor encoder, the angle change that motor is rotated is corresponding electrical signal, be delivered to CPU in the servo control box through signaling line 311, and detect the three-phase electricity flow valuve of motor by current sensor, calculating through CPU, calculate suitable magnitude of voltage, add to the voltage swing of motor with control, form the closed loop control to motor.AC servo motor 320 is connected with two-way pump shaft 323 by coupling 321, thereby drives two-way pump 324 work, and gear pump is a kind of typical two-way pump.Two-way pump 324 is connected with oil hydraulic pump 330 by the first hydraulic oil pipe 334, the second hydraulic oil pipe 335.When AC servo motor 320 drove two-way pump 324 towards a direction rotation, hydraulic oil flowed to a direction, moved to a direction thereby promote hydraulic piston 331; When AC servo motor 320 drive two-way pumps 324 rotated to another way, hydraulic oil flowed to another direction, thereby promoted hydraulic piston 331 to another direction motion.The second hydraulic rod 332, the first hydraulic rod 333 link to each other with hydraulic piston 331, repeatedly move with hydraulic piston 331, wherein the first hydraulic rod 333 links to each other with sucker rod 341, it is reciprocating to drive sucker rod 341, thereby realize oil well pump 340 oil pumping, the oil in the oil well pump 340 is delivered to the main oil outlet 350 of oil pumping system by oil well pump oil outlet tube 342.
Wherein, general structure for system of the present invention is installed, is assembled schematic representation as shown in Figure 2, wherein, main oil outlet 350 is fixedly connected with by connected element 361 with main oil pipe 360, main oil pipe 360 is from the underground D that elevates above the soil, and fixed equipment C fixes by ground, and main oil pipe 360 and main pipe A are positioned at oil well, the oil well internal layer is protection steel pipe E, and skin is cement layer F.
In this enforcement, the second hydraulic rod 332 and the first hydraulic rod 333 stretch out hydraulic cylinder, when two-way pump 324 rotates to a direction, hydraulic oil in the two-way pump 324 flows from a direction to another direction, as flow to the first hydraulic tube 334, then the hydraulic oil in the two-way pump 324 flows to the upper hydraulic pressure cavity (spaces on hydraulic piston 331 tops) of oil hydraulic pump from the first hydraulic tube 334, moves downward thereby promote hydraulic piston 331; At this moment, the hydraulic oil in the lower hydraulic pressure chamber of oil hydraulic pump (spaces of hydraulic piston 331 bottoms) flows to the two-way pump 324 from the second hydraulic tube 335, so forms circulating of a hydraulic oil; When two-way pump 324 rotates to another direction, form circulating of a reciprocal hydraulic oil.This shows, the present invention does not need fluid infusion system, the pipeline pressure balance sysmte in the present technology, reduced element, simplified control object, and, the efficient of the oil hydraulic pump that uses in the present embodiment, alternating current servomotor itself is very high, and transmission is simple, therefore so that efficient improves a lot than prior art; And there is not the sucker rod of hundreds of upper kms in native system, has not had the frictional loss of sucker rod and oil pipe, does not promote the energy loss of sucker rod yet, and therefore than existing rod pumping system, energy consumption will be the reduction of the order of magnitude.
Embodiment two
Referring to Fig. 3, be oil pumping system embodiment's two of the present invention structural representation.Different from embodiment one is, the oil pumping unit among the present invention has two oil well pumps, as shown in the figure 340 ', in the present embodiment, the oil well pump oil outlet tube 342,342 ' of two oil well pumps combines, and delivers in the main oil outlet 350 of oil pumping system.
Compare with embodiment one, present embodiment takes full advantage of oil hydraulic pump 324, and the first hydraulic rod 332 is connected with the second oil well pump 340 ', like this, when hydraulic piston 331 to-and-fro motion of oil hydraulic pump 330, first and second oil well pump 340 ' time-sharing work is so that pumping efficiency is doubled.
Embodiment three
Referring to Fig. 4-Fig. 6, be oil pumping system embodiment's three of the present invention structural representation.In the present invention, a plurality of oil pumping modules can be combined and form an oil pumping system, in an embodiment, oil pumping system is comprised of three oil pumping modules.Wherein, Figure 4 shows that the structural representation of oil pumping module among the oil pumping system embodiment three of the present invention, this oil pumping module and embodiment one do not repeat them here or/and embodiment two is basic identical; Figure 5 shows that the structural representation of total oil outlet, total oil outlet is comprised of main oil outlet 350 and filler opening 351,352, and filler opening can be 1, and 2,3 etc. is 2 filler openings among the figure.Fig. 6 is that total oil outlet and each oil pumping module link together, and is connected by connected element between the mounted schematic representation, total oil outlet and oil pumping module and each oil pumping module, and connected element can be to be threaded or flange connection etc.The oil that the oil well pump of each oil pumping module is released is transported to main oil outlet 350 by oil outlet tube, and main oil outlet 350 is communicated with main oil pipe, by main oil pipe oil is transported to ground, referring to Fig. 1.
In addition, in order to control the stroke of oil hydraulic pump, highs and lows at oil hydraulic pump is provided with limit switch 313,314 respectively, as shown in Figure 8, limit signal is passed to servo control box 310, servo control box 310 is according to limit signal control alternating current servomotor 320 forward or reverse, thus the to-and-fro motion of realization oil hydraulic pump 330 and oil well pump 340.Certainly, also can not adopt limit switch, when hydraulic piston arrived the highest or minimum point of oil hydraulic pump, the electric current of actuating motor can increase suddenly, can control according to this signal the clockwise and anticlockwise of actuating motor; Can also calculate by the angle that actuating motor turns over the stroke of hydraulic pump piston, thereby determine when to allow actuating motor change turn to.
In the above-described embodiments, oil well pump can adopt conventional structure, shown in Fig. 8,9, is a kind of typical oil well pump structural representation, wherein, when being in upstroke as shown in Figure 8, when being in down stroke as shown in Figure 9.Sucker rod 341 connects the valve bonnet 3441 that moves about, and the valve bonnet 3441 that moves about is fixed on the valve seat 3461 that moves about, and the valve seat 3461 that moves about is connected with piston 347, moves about valve ball 3451 in move about valve seat 3461 and the space between the valve bonnet 3441 of moving about.In the space of fixed valve ball 3452 between fixed valve base 3462 and standing valve cover 3442.Oil enters oil well pump from standing valve, flows out from oil well pump oil outlet tube 342.The oil well pump oil outlet tube is transported to main oil outlet with oil, and main oil outlet is communicated with main oil pipe, by main oil pipe oil is transported to ground.
In addition, can have multiple for the mode that oil pumping system of the present invention is placed in the main pipe, the oil pumping system of Figure 10-14 in Fig. 1 be as example, illustrates and the set-up mode of other (except the modes of emplacements shown in the embodiment one) in main pipe.Certainly, applicable equally to other oil pumping systems described in the present invention.
Figure 10 is the structural representation that oil well pump oil outlet tube and oil hydraulic pump oil outlet tube all are placed on main pipe inside.This mode compact structure, all parts all in main pipe, have the main pipe protection.But require each arrangements of components in the main pipe reasonable, can not the phase mutual interference.
In Figure 11, oil well pump oil out directly enters the main pipe chamber, and independently transport pipe is transported to main oil outlet with oil, and the main pipe chamber is communicated with main oil pipe.This moment, each parts all was immersed in the fluid of main oil pipe, bear the pressure of main oil pipe fluid, and the compression resistance of each parts has been proposed high requirement.Advantage is to have lacked middle transport pipe, also just need not consider the sealing problem relevant with middle transport pipe.
Figure 12 is the special case of Figure 11, and the outer wall of oil well pump is main pipe, and oil well pump and main pipe are as a whole.A lot of oil well pumps of existing oil pumping system are design like this.The advantage of this structure is: simple in structure, can directly use existing oil well pump commonly used, and cost is relatively low.Shortcoming is: the compression resistance to each parts has proposed high requirement, is unfavorable for simultaneously the connection between each module among the embodiment three.
Figure 13, Figure 14 are two kinds of means of fixation of pipe inner piece, and each parts is separately fixed on the main pipe among Figure 13, is the mode that is connected and fixed of routine.Each parts is fixed on the rectangular part first among Figure 14, and then rectangular part is fixed on the main pipe, can first each parts all have been fixed at rectangular part like this, put into together main pipe, then only need fix again rectangular part and get final product, install and fix easily.
In oil pumping process, because oil well pump exists when to-and-fro motion and accelerates and slow down, this motion will make the stressed change of main oil pipe, namely produce vibration, vibrate larger, the easier fatigue of main oil pipe, thereby loss increasing.The present invention can well address this problem, and main oil pipe is stressed evenly effectively to reduce the oil pipe loss thereby make.Below for above-mentioned three embodiments, the stressed of main oil pipe is analyzed as follows:
The quality of liquid is in the main oil pipe:
m＝ρV＝ρSh
Wherein, the quality of liquid in the m----oil pipe
The density of liquid in the ρ-----oil pipe
The sectional area of S----oil pipe
The height of h----oil pipe inner fluid
Get ρ=1 * 10
3Kg/m
3, S=60 * 10
-4m
2, h=2000m
M=1 * 10 then
3* 60 * 10
-4* 2000=12000kg
Oil well pump is when pumping, and sucker rod is all in accelerated motion at first in upstroke and down stroke, and establishing acceleration is a=1m/s
2
For above-mentioned three embodiments, the speed change curves of sucker rod as shown in figure 15,
For embodiment one, get oil pump piston sectional area: S
Piston A=54 * 10
-4m
2, sucker rod sectional area: S
Bar A=5 * 10
-4m
2
When the upstroke sucker rod accelerated, the acceleration of liquid was in the oil pipe:
The pulling force that oil pipe increases is:
Δ F
On the A=ma
On the A=0.9ma=0.9 * 12000 * 1=10800N
When the down stroke sucker rod accelerated, the acceleration of liquid was in the oil pipe:
The pulling force that oil pipe increases is:
Δ F
Under the A=ma
Under the A=0.083ma=0.083 * 12000 * 1=996N
Then, the stress curve of main oil pipe is as shown in figure 17 among the embodiment one.
For embodiment two, because native system has two oil well pumps, in the identical situation of oil pipe total displacement and embodiment one, get oil pump piston sectional area: S
Piston B=27 * 10
-4m
2, sucker rod sectional area: S
Bar B=2.5 * 10
-4m
2
When sucker rod 1 upstroke, sucker rod 2 is down stroke,
When sucker rod 1 down stroke, sucker rod 2 is upstroke, then
When sucker rod accelerated, the acceleration of liquid was in the oil pipe:
The pulling force that oil pipe increases is:
ΔF
B＝ma
B＝0.492ma＝0.492×12000×1＝5904N
Then, the stress curve of main oil pipe is as shown in figure 17 among the embodiment two.
For embodiment three, because 3 oil well pumps (be the versatility of explanation, be made as n) are arranged in the native system, in the identical situation of oil pipe total displacement and embodiment one, each pump delivery of pumping is the 1/n of embodiment's one oil well pump discharge capacity;
Control each oil well pump by servo-control system and accelerate in the different time periods, can reduce significantly the pulling force that oil pipe increases, namely reduce significantly the amplitude of the variation of oil pipe pulling force;
When n=4,
Then main oil pipe is as shown in figure 18 stressed.
From above-mentioned three stress curve figure, can find out, at the boost phase of up-down stroke, stressed variation of the embodiment two is less than stressed variation of the embodiment one, implements three the stressed 2/n that is changed to embodiment two, when n got higher value, stressed variation of the embodiment three will be very little.
The springform of steel is measured: E=200GPa
The cross-section area of pipe is got: S
Pipe=10 * 10
-4m
2
Oil pipe is owing to the length change that tension variations causes is:
Embodiment one:
Embodiment two:
Embodiment three:
By above-mentioned contrast as seen, embodiment three Δ L is minimum, and the vibration of main oil pipe is little, and working life is the longest; Simultaneously, the also discharge capacity of easier increase whole system of embodiment three.
It should be noted last that: above embodiment is only unrestricted in order to the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, the modification of under the premise without departing from the spirit and scope of the present invention the present invention being carried out or be equal to replacement all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. oil pumping module, comprise control mechanism, hydraulic drive mechanism and oil pumping unit, it is characterized in that, described control mechanism, hydraulic drive mechanism and oil pumping unit all are positioned at underground main pipe, wherein, described oil pumping unit comprises oil hydraulic pump and the first oil well pump, described oil hydraulic pump comprises hydraulic cylinder, piston and the first hydraulic rod that is connected with described piston and the second hydraulic rod, described the first hydraulic rod and the second hydraulic rod oppositely stretch out described hydraulic cylinder mutually, and be respectively equipped with the liquid import/export in two ends up and down at described oil hydraulic pump, the first hydraulic rod of described oil hydraulic pump is connected with the sucker rod of described the first oil well pump, and the oil outlet of described the first oil well pump links to each other with the oil outlet of oil pumping system by pipeline; Oil hydraulic pump in the described oil pumping unit up and down liquid import/export at two ends links to each other with described hydraulic drive mechanism by first and second hydraulic oil pipe respectively, described hydraulic drive mechanism links to each other with described control mechanism, control described hydraulic drive mechanism work by described control mechanism, control oil hydraulic pump in the described oil pumping unit by described hydraulic drive mechanism, drive described the first oil well pump by described oil hydraulic pump and carry out reciprocal oil pumping work.
2. a kind of oil pumping module according to claim 1 is characterized in that, also comprises the second oil well pump, and the second hydraulic rod of described oil hydraulic pump is connected with the sucker rod of described the second oil well pump; The oil outlet of described the second oil well pump links to each other with the oil outlet of oil pumping system by pipeline or links to each other with the oil outlet of described the first oil well pump.
3. a kind of oil pumping module according to claim 1 and 2 is characterized in that, also comprises limit switch, is used for the upper and lower stroke of restriction oil hydraulic pump.
4. a kind of oil pumping module according to claim 1, it is characterized in that, described hydraulic drive mechanism comprises two-way pump and motor, and described motor is connected with described two-way pump by coupling, and described two-way pump is connected with first and second hydraulic oil pipe of oil hydraulic pump in the described oil pumping unit.
5. a kind of oil pumping module according to claim 4 is characterized in that, described two-way pump is gear pump, and described motor is alternating current servomotor.
6. an oil pumping system is characterized in that, comprises one or morely such as the arbitrary described oil pumping module of claim 1-5, and the oil outlet of described each oil pumping module links to each other with total oil outlet by pipeline.
7. oil pumping system according to claim 6 is characterized in that, described each oil pumping module connects by link each other, the Placement of described link for being threaded or/and the flange connection.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100083916A CN101532486B (en) | 2008-03-11 | 2008-03-11 | Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system |
| PCT/CN2009/070688 WO2009111970A1 (en) | 2008-03-11 | 2009-03-09 | Hydraulic cylinder, oil pumping unit, oil pumping module and oil pumping system |
| EP09719223.1A EP2280174A4 (en) | 2008-03-11 | 2009-03-09 | Hydraulic cylinder, oil pumping unit, oil pumping module and oil pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100083916A CN101532486B (en) | 2008-03-11 | 2008-03-11 | Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101532486A CN101532486A (en) | 2009-09-16 |
| CN101532486B true CN101532486B (en) | 2013-04-03 |
Family
ID=41064756
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100083916A Expired - Fee Related CN101532486B (en) | 2008-03-11 | 2008-03-11 | Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2280174A4 (en) |
| CN (1) | CN101532486B (en) |
| WO (1) | WO2009111970A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132954B (en) * | 2011-11-30 | 2015-06-10 | 辽宁东工装备制造有限公司 | Full hydraulic changing stroke energy-saving type oil pumping unit |
| CN102434127A (en) * | 2011-12-29 | 2012-05-02 | 内蒙古工业大学 | Pulsating reciprocating type hydraulic pumping unit |
| CN102828729A (en) * | 2012-09-12 | 2012-12-19 | 鞍山红拖轧钢有限公司 | Fully-automatic hydraulic pumping unit |
| CN103410478B (en) * | 2013-08-07 | 2015-12-09 | 中国石油化工股份有限公司 | The hollow oil rig of a kind of producing profile testing |
| CN104265245A (en) * | 2014-09-13 | 2015-01-07 | 西安隽格软件科技有限公司 | Beam pump fixed-point starting and stopping control mechanism |
| CN105649579B (en) * | 2016-03-21 | 2018-11-06 | 雪曼圣杰科技有限公司 | A kind of nearly well spacing well group single tube Rodless hydraulic production test unit |
| RU177215U1 (en) * | 2017-08-07 | 2018-02-13 | Общество с ограниченной ответственностью "Промтехнологии" | INSTALLATION FOR LIFTING WELL LIQUID |
| CN107725011B (en) * | 2017-10-19 | 2020-11-17 | 百恒石油装备有限公司 | Intermittent type formula beam-pumping unit controlgear and oil pumping system |
| CN108049844A (en) * | 2018-01-10 | 2018-05-18 | 北京态金科技有限公司 | Oil rig |
| CN109577921A (en) * | 2018-11-16 | 2019-04-05 | 天津中嘉盛君精密机械有限公司 | A kind of completion system with double oil extraction pumps and detection structure |
| US20200248680A1 (en) * | 2019-02-04 | 2020-08-06 | Baker Hughes Oilfield Operations Llc | Double hydraulic activated receptacle pump |
| CN113338863B (en) * | 2020-02-18 | 2022-07-05 | 中国石油天然气股份有限公司 | Pumping-stop-free collision pump device for pumping unit well |
| CN114991727B (en) * | 2022-07-18 | 2022-10-28 | 石家庄爱科特科技开发有限公司 | Method for determining interval oil pumping parameters of oil pumping system |
| CN116181624A (en) * | 2022-12-04 | 2023-05-30 | 南华大学 | Hydraulic multistage piston liquid lifting mechanism |
| CN117211736A (en) * | 2023-09-21 | 2023-12-12 | 双弓高新装备(武汉)有限公司 | Hydraulic driving pumping unit capable of automatically adjusting pumping stroke and pumping speed |
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- 2009-03-09 EP EP09719223.1A patent/EP2280174A4/en not_active Withdrawn
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| US3804557A (en) * | 1972-05-26 | 1974-04-16 | A Bentley | Surface operated single tube pump |
| CN2251634Y (en) * | 1995-04-03 | 1997-04-09 | 毕华照 | Hydrodynamic deep oil-well pump |
| CN1773116A (en) * | 2004-09-22 | 2006-05-17 | 陈长安 | Oil production long extraction method |
| CN101054968A (en) * | 2007-05-30 | 2007-10-17 | 李洪敏 | Hydraulic oil pump |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2280174A1 (en) | 2011-02-02 |
| EP2280174A4 (en) | 2017-01-11 |
| CN101532486A (en) | 2009-09-16 |
| WO2009111970A1 (en) | 2009-09-17 |
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Effective date of registration: 20160721 Address after: 310052, Zhejiang, Binjiang District, 1805 east stream Road, 3, 5, 503, room, Hangzhou Patentee after: Hangzhou Kun Kun oil extraction equipment Co., Ltd. Address before: 310019 4D, No. nine, 63 Ring Road, Jianggan District, Zhejiang, Hangzhou Patentee before: Zhejiang Zhongke Derun Technology Co.,Ltd. |
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