CN107387031A - A kind of single-well injection-production pump group - Google Patents
A kind of single-well injection-production pump group Download PDFInfo
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- CN107387031A CN107387031A CN201710720217.3A CN201710720217A CN107387031A CN 107387031 A CN107387031 A CN 107387031A CN 201710720217 A CN201710720217 A CN 201710720217A CN 107387031 A CN107387031 A CN 107387031A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 147
- 239000003921 oil Substances 0.000 claims description 115
- 238000005485 electric heating Methods 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000010721 machine oil Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 21
- 230000008901 benefit Effects 0.000 abstract description 13
- 238000005406 washing Methods 0.000 abstract description 4
- 239000003129 oil well Substances 0.000 description 30
- 230000005484 gravity Effects 0.000 description 26
- 239000007788 liquid Substances 0.000 description 17
- 239000001993 wax Substances 0.000 description 17
- 238000011049 filling Methods 0.000 description 15
- 239000012530 fluid Substances 0.000 description 15
- 230000008021 deposition Effects 0.000 description 12
- 238000000926 separation method Methods 0.000 description 12
- 238000009434 installation Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000750 progressive effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/006—Combined heating and pumping means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a kind of single-well injection-production pump group, including linear dynamo oil pump, linear electric motors water injecting pump and the oil water separator being arranged between the linear dynamo oil pump and the linear electric motors water injecting pump, the linear dynamo oil pump is arranged at the oil water separator top, and the linear electric motors water injecting pump is arranged at the oil water separator bottom；Single-well injection-production pump group provided by the invention, single-well injection-production system pump highly effective and safe can be made convenient and reliable, can realize and not stop well hot-washing wax remover automatically, to ensure the popularization of single-well injection-production technique, give full play to the economic benefit and social benefit of single-well injection-production technique.
Description
Technical field
The present invention relates to oilfield exploitation engineering device technique field, more particularly to a kind of single-well injection-production pump group.
Background technology
With oil field enter high water cut rate after, oil field production in expose a series of contradictions, mainly include oil well because
Aqueous rising causes prematurely to stop production, causes recovery ratio to decline close to the economic exploitation limit；High output of oilwell water causes water process
Scale increases, and processing equipment input and operating cost are continuously increased；The leakage in output water treatment procedure and discharge cause simultaneously
More and more prominent environmental protection pressure；For oil-containing, the content of wax it is high between adopt, a note well, increase conventional well-flushing the frequency and
Expense.The effective way to solve the above problems be by existing oil well hoisting system transformed and with downhole oil-water separation technology
It is combined, forms downhole oil-water separation single-well injection-production system, enumerated the oil after separation with downhole pump, with underground water-injection pump
By the water re-injection after separation, the technology can reduce the cost for oil production of high water cut oil field, improve oil field comprehensive benefit.
For oil well pump, water injecting pump for single-well injection-production system, most basic requirement is：
(1) it is (right that downhole parameters such as output stressor layer, moisture content, oil water separator efficiency, particularly yield, be can adapt to
Answer pump discharge) etc. dynamic change, and make timely and effectively dynamic response；
(2) output stressor layer energy can, be made full use of；
(3), highly effective and safe is reliable；
(4), it is easy to underground mounting arrangements；
(5), not wax deposition.
Oil well pump and water injecting pump currently used for single-well injection-production system substantially have three kinds, first, common oil pumper (is knocked
Head machine) driving 2 series oil-well pumps come be respectively completed water filling, recover the oil；Second, the subsurface progressive cavities of 2 series connection are respectively completed
Water filling, oil recovery；Third, 2 underground electric submersible pumps come be respectively completed water filling, recover the oil.Certainly also there are oil well pump+underground electric submersible pump or well
The combination of lower screw pump+underground electric submersible pump come complete water filling, recover the oil.Oil well pump and water injecting pump most base for single-well injection-production system
This seeks to adaptation downhole parameters such as output stressor layer, moisture content, particularly oil water separator efficiency, yield (respective pump stream
Amount) etc. dynamic change, and can timely dynamic response.For example if water filling pump discharge can not be adjusted dynamically, otherwise may
Oil-containing water is recycled into underground, not only to block implanted layer, causes pump pressure to raise, more frighteningly causes the underground of unrepairable
Pollution.It is exactly that water content is excessive in oil well pump extraction crude oil, forms inefficient cycle, cause significant wastage, do not reach completely
To the dreamboat of single-well injection-production technique.
And 2 series oil-well pumps driven at present in single-well injection-production system using oil pumper (machine of kowtowing) are noted to be respectively completed
Water, oil recovery.Not only system complex efficiency is low, it is important to can not meet the dynamic change of yield (corresponding pump discharge).It is although Chinese
Disclosed in patent 201611167280.0《A kind of oil well pump of adjustable effective stroke》By being taken out in the artificial machinery adjustment in ground
Fuel feed pump plunger and pump barrel relative position, that is, change the method for dischargeable capacity to change pump discharge, but this method is hysteresis
It is non-dynamic not in time, it is impossible to meet the requirement of underground oil-water dynamic change, and need shutdown adjustment.Simultaneously during pump work
A part of idle work is done, is not saved.It is respectively completed water filling using the subsurface progressive cavity of 2 series connection, recovers the oil, although can leads to
The method for crossing speed governing changes the flow of pump, but is same motor driving for water filling, the two pumps to recover the oil, and flow is that same time-varying is big
Or diminish, the dynamic change requirement of underground oil-water can not be met.Output stressor layer rotates to screw rod during subsurface progressive cavity water filling
When axial force reaction force it is also very big, it is possible to pump produce harm.Chinese patent 201420407147.8《One kind is used for same
The screw rod pump protector of well injection and extraction system》Exactly the influence of screw pump is developed in order to reduce output stressor layer, it is impossible to
But instead it can be done harm to using output stressor layer by it.It is respectively completed water filling using 2 underground electric submersible pumps, recovers the oil, speed governing can be passed through
Method adjustment flow.But underground electric submersible pump is centrifugal multistage pump multiple centrifugal pump, first do not say that the high voltage small flow centrifugal efficiency of pump is very low, it is important to
Pump discharge change when pump lift (pump pressure) change simultaneously, if the lift (pump pressure) of pump can not meet water filling, oil recovery
It is required that, then pump is just voluntarily adjusted and run under lower pump efficiency, and motor may be had a fever or even damage, and reliability is difficult to ensure that.
Influence of the output stressor layer to underground electric submersible pump simultaneously is also very big.Disclosed in Chinese patent 201420361109.3《Suitable for same
The inversion centrifugal multistage pump multiple centrifugal pump that well note is adopted》Exactly overcome influence of the output stressor layer to pump axial force using thrust terminator, but it is multistage from
Once heart pump design typification, the axial force corresponding to it is certain, it is difficult to the influence of strata pressure change is adapted to, and can not
But instead it can be done harm to using output stressor layer by it.Certainly use is respectively combined with three kinds of pumps, equally exists above mentioned problem.
Normally, linear dynamo oil pump is so that its exclusive advantage such as underground is easy for installation, Flow-rate adjustment is simple, efficiently pacifies
Congruence, it should be applied in single-well injection-production system.But there is many lack in the application example of actually linear dynamo oil pump
Fall into, such as influence of the fluid column gravity to linear motor rotor stress in flowline, while existing linear dynamo oil pump is not also complete
How complete solution certainly makes full use of the problem of output stressor layer, is also exactly in single-well injection-production system mounting arrangements inconvenience, etc..
Chinese patent 201410176744.9《Three-tube type linear dynamo oil pump》Using the unilateral driving piston reciprocation of mover
Motion, there is output stressor layer energy can not be made full use of, there is also fluid column gravity in flowline to linear motor rotor by
The problem of power influences, while the unilateral driving of actuating motor, the arrangement installation of single-well injection-production down-hole string is not utilized.
Chinese patent 201620132423.3《A kind of linear dynamo oil pump and the pump housing》Special pump body structure is utilizing
Output stressor layer, it is really effective to linear electric motors loading effect aspect to eliminate fluid column gravity in flowline.But because mover is unilateral
Piston reciprocation motion is driven in the bad mounting arrangements in underground, pump housing flow passage structure complex effects pump efficiency and reliability.
Chinese patent 201310482601.6《A kind of motor-and-pump integrated downhole oil extraction device of magnetic suspension》Although very convenient well
Lower mounting arrangements, output stressor layer energy is also taken full advantage of, but it is descending to linear electric motors without fluid column gravity in flowline is eliminated
The influence of load.The problem of maximum is to connect plunger by the use of linear motor stator electric inner sheath as pump barrel, linear motor rotor, and straight
Line motor stator inner sheath is actually thickness 1mm or so thin-wall slim pipe, and difficulty of processing is very big, wearability is bad, and it is pacified
Full reliability it is difficult to ensure that, the most serious is the fluid column gravity in flowline in down stroke to the inertia force of electric mover very
Greatly, it is entirely possible to cause motor damage, endanger the accidents such as underground equipment.
Meanwhile above-mentioned three kinds of linear dynamo oil pump patents are that electric mover is connected with plunger, virtually add pump
Length, also just increase underground installation difficulty.
There is presently no using data for down-hole linear motor water injecting pump.
Underground flow passage components wax deposition is inevitable, and paraffin removal is necessary.It is unrelated with using which type of down-hole pump, but for
For single-well injection-production technique, particularly three adopt after single-well injection-production technique for, wax deposition problem will be more serious.Because crude oil passes through
After oil water separator separation, the oil concentration that oil well pump is lifted greatly improves, and the content of wax, concentration containing colloid are just high in oil, oil pump
Flow passage components (valve group, sealing, pump barrel, plunger, pipeline etc.) are just easy to wax deposition.Simultaneously because the separation of downhole separation system
Effect is limited, and the complicated component (such as polymer-bearing waste-water) in reinjected water will also result in water injecting pump flow passage components and be easier wax deposition；Also
Generally all it is low pump speed operation exactly in order to improve the reliability of down-hole pump, particularly displacement pump, low pump speed is run, liquid flow
Speed is low, suspension easily precipitates, and will also result in pump flow passage components and is easier wax deposition etc..Influence after wax deposition to down-hole pump is that this is special
Well known to industry personnel.Current effective method is to stop well hot wash, that is, high-temperature high pressure water is injected from ground to underground
It is rinsed.Time-consuming for hot wash, costly, influence production.
How to play that downhole linear electric motor oil-well pump is easy for installation, Flow-rate adjustment is simple, can make full use of output layer
The reliable advantage of pressure energy, highly effective and safe, develops single-well injection-production systems pumps, solves the problems, such as flow passage components wax deposition, is ability
Field technique personnel's urgent problem to be solved.
The content of the invention
It is an object of the invention to provide a kind of single-well injection-production pump group, to solve the above-mentioned problems of the prior art, makes same
Well injection and extraction system is convenient and reliable with pump highly effective and safe, can realize and not stop well hot-washing wax remover automatically, to ensure single-well injection-production technique
Popularization, give full play to the economic benefit and social benefit of single-well injection-production technique.
To achieve the above object, the invention provides following scheme：
The present invention provides a kind of single-well injection-production pump group, including linear dynamo oil pump, linear electric motors water injecting pump and is arranged at
Oil water separator between the linear dynamo oil pump and the linear electric motors water injecting pump, the linear dynamo oil pump are set
In the oil water separator top, the linear electric motors water injecting pump is arranged at the oil water separator bottom；
The linear dynamo oil pump includes first straight line motor stator, first straight line electric mover, the first cylinder sleeve, first
Standing valve and the first travelling valve, the first straight line motor stator both ends are connected with first cylinder sleeve and described first in turn and consolidated
Determine valve, one end endoporus of the first cylinder sleeve both ends respectively with the first straight line motor stator and first standing valve connects
Connecing, the endoporus of first cylinder sleeve communicates with the endoporus of the first straight line motor stator and first standing valve, and described
One linear motor rotor is the circular tube structure that an inside carries the first profit path, and first travelling valve is arranged at described first
Linear motor rotor bottom, the first straight line electric mover are arranged at the first straight line motor stator and the first straight line
In the through hole of first cylinder sleeve at motor stator both ends, the outer wall both ends of the first straight line electric mover and first cylinder
The first seal assembly is provided between set, the valve seat of first travelling valve is located at valve ball bottom, the valve of first standing valve
Seat is located at valve ball bottom；
The linear electric motors water injecting pump includes second straight line motor stator, second straight line electric mover, the second cylinder sleeve, second
Standing valve and the second travelling valve, the second straight line motor stator both ends are connected with second cylinder sleeve and described second in turn and consolidated
Determine valve, one end endoporus of the second cylinder sleeve both ends respectively with the second straight line motor stator and second standing valve connects
Connecing, the endoporus of second cylinder sleeve communicates with the endoporus of the second straight line motor stator and second standing valve, and described
Two linear motor rotors are the circular tube structure that an inside carries the second profit path, and second travelling valve is arranged at described second
Linear motor rotor bottom, the second straight line electric mover are arranged at the second straight line motor stator and the second straight line
In the through hole of second cylinder sleeve at motor stator both ends, the outer wall both ends of the second straight line electric mover and second cylinder
The second seal assembly is provided between set, the valve seat of second travelling valve is located at the top of valve ball, the valve of second standing valve
Seat is at the top of valve ball.
Preferably, the first electric heating element is provided with the middle part of first outer wall of cylinder jachet, is set outside first electric heating element
Be equipped with the first sheath, described first sheath one end is connected with the outer wall of first standing valve, the first sheath other end with
The outer wall connection of the first straight line motor stator.
Preferably, first sheath and the junction of first standing valve and first sheath and described first are straight
The junction of line motor stator is provided with sealing ring.
Preferably, first electric heating element is temperature controllable electric heating element.
Preferably, the second electric heating element is provided with the middle part of second outer wall of cylinder jachet, is set outside second electric heating element
Be equipped with the second sheath, described second sheath one end is connected with the outer wall of second standing valve, the second sheath other end with
The outer wall connection of the second straight line motor stator.
Preferably, second sheath and the junction of second standing valve and second sheath and described second are straight
The junction of line motor stator is provided with sealing ring.
Preferably, second electric heating element is temperature controllable electric heating element.
Preferably, first cylinder sleeve at the linear dynamo oil pump both ends is symmetrical arranged.
Preferably, second cylinder sleeve at the linear electric motors water injecting pump both ends is symmetrical arranged.
Preferably, in addition to the displacement that is separately positioned on the linear dynamo oil pump and the linear electric motors water injecting pump
Sensor and velocity sensor, institute's displacement sensors and the velocity sensor are connected with a control system.
The present invention achieves following advantageous effects relative to prior art：
Single-well injection-production pump group provided by the invention, linear dynamo oil pump and linear electric motors water injecting pump are simple in construction, underground
It is easy for installation, Flow-rate adjustment is simple, output stressor layer can be utilized when linear dynamo oil pump and linear electric motors water filling pump work
Energy, highly effective and safe are reliable, versatile, and electric heating element is provided with linear dynamo oil pump and linear electric motors water injecting pump,
It can realize and not stop well hot-washing wax remover automatically, ensure the popularization of single-well injection-production technique, fully demonstrated single-well injection-production technique
Economic benefit and social benefit.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the integral installation distribution structure schematic diagram of single-well injection-production pump group in the present invention；
Fig. 2 is the structural representation of the linear dynamo oil pump in single-well injection-production pump group in the present invention；
Fig. 3 is the mplifying structure schematic diagram on the linear dynamo oil pump top in single-well injection-production pump group in the present invention；
Fig. 4 is the mplifying structure schematic diagram of the linear dynamo oil pump bottom in single-well injection-production pump group in the present invention；
Fig. 5 is the structural representation of the linear electric motors water injecting pump in single-well injection-production pump group in the present invention；
Fig. 6 is the mplifying structure schematic diagram on the linear electric motors water injecting pump top in single-well injection-production pump group in the present invention；
Fig. 7 is the mplifying structure schematic diagram of the linear electric motors water injecting pump bottom in single-well injection-production pump group in the present invention；
In figure：1- linear dynamo oil pumps, 2- linear electric motors water injecting pump, 3- oil water separators, 11- first straight line motors are determined
Son, 12- first straight lines electric mover, the cylinder sleeves of 13- first, the standing valves of 14- first, the travelling valves of 15- first, the profits of 16- first lead to
Road, the seal assemblies of 17- first, the electric heating elements of 18- first, the sheaths of 19- first, 21- second straight lines motor stator, 22- second are straight
Line electric mover, the cylinder sleeves of 23- second, the standing valves of 24- second, the travelling valves of 25- second, the second profits of 26- path, 27- second are close
Sealing assembly, the electric heating elements of 28- second, the sheaths of 29- second, A- well heads, B- water fillings layer, C- profits line of demarcation, D- outputs layer, Q11-
Cavity volume under oil well pump, cavity volume under cavity volume, Q21- water injecting pumps, cavity volume on Q22- water injecting pumps on Q12- oil well pumps.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is an object of the invention to provide a kind of single-well injection-production pump group, to solve the problems, such as that prior art is present.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
The present invention provides a kind of single-well injection-production pump group, as shown in figs. 1-7, including linear dynamo oil pump 1, linear electric motors note
Water pump 2 and the oil water separator 3 being arranged between linear dynamo oil pump 1 and linear electric motors water injecting pump 2, specifically, straight-line electric
Machine oil well pump 1 is arranged at the top of oil water separator 3, and linear electric motors water injecting pump 2 is arranged at the bottom of oil water separator 3；
The concrete structure of wherein linear dynamo oil pump 1 is:Including first straight line motor stator 11, first straight line motor
Sub 12, first cylinder sleeve 13, the first standing valve 14 and the first travelling valve 15, the both ends of first straight line motor stator 11 are connected with the in turn
One cylinder sleeve 13 and the first standing valve 14, first cylinder sleeve 13 at the both ends of first straight line motor stator 11 are symmetrical arranged, the first cylinder sleeve 13
One end endoporus of the both ends respectively with the standing valve 14 of first straight line motor stator 11 and first is connected, the endoporus of the first cylinder sleeve 13 and
The endoporus of one linear motor stator electric 11 and the first standing valve 14 communicates, and first straight line electric mover 12 is an inside with the first oil
The circular tube structure of water passage 16, the first travelling valve 15 are arranged at the bottom of first straight line electric mover 12, first straight line electric mover
12 are arranged in the through hole of first straight line motor stator 11 and first cylinder sleeve 13 at the both ends of first straight line motor stator 11, and first is straight
The first seal assembly 17 is provided between the outer wall both ends of line electric mover 12 and the first cylinder sleeve 13, to ensure first straight line motor
The sealing property of the junction of 12 and first cylinder sleeve of mover 13, the valve seat of the first travelling valve 15 are located at valve ball bottom, the first standing valve
14 valve seat is located at valve ball bottom；
It is provided with the first electric heating element 18 of temperature controllable in the middle part of the outer wall of the first cylinder sleeve 13 of linear dynamo oil pump 1, first
The first sheath 19 is provided with outside electric heating element 18, the one end of the first sheath 19 is connected with the outer wall of the first standing valve 14, the first shield
The outer wall for covering 19 other ends with first straight line motor stator 11 is connected, also, the connection of the first sheath 19 and the first standing valve 14
Place and the junction of the first sheath 19 and first straight line motor stator 11 are provided with sealing ring.
The concrete structure of linear electric motors water injecting pump 2 is substantially identical with the structure of linear dynamo oil pump 1, only in standing valve and
Distinct on the mounting means of travelling valve, it is straight that specific linear electric motors water injecting pump 2 includes second straight line motor stator 21, second
Line electric mover 22, the second cylinder sleeve 23, the second standing valve 24 and the second travelling valve 25, the both ends of second straight line motor stator 21 are successively
The second cylinder sleeve 23 and the second standing valve 24 are connected with, the cylinder sleeve at the both ends of second straight line motor stator 21 is symmetrical arranged, the second cylinder sleeve
One end endoporus of 23 both ends respectively with the standing valve 24 of second straight line motor stator 21 and second is connected, the endoporus of the second cylinder sleeve 23 with
The endoporus of the standing valve 24 of second straight line motor stator 21 and second communicates, and second straight line electric mover 22 is that an inside carries second
The circular tube structure of profit path 26, the second travelling valve 25 are arranged at the bottom of second straight line electric mover 22, second straight line motor
Son 22 is arranged in the through hole of second straight line motor stator 21 and second cylinder sleeve 23 at the both ends of second straight line motor stator 21, and second
The second seal assembly 27 is provided between the outer wall both ends of linear motor rotor 22 and the second cylinder sleeve 23, to ensure second straight line electricity
Motor-driven sub 22 and the sealing property of the junction of the second cylinder sleeve 23, linear dynamo oil pump 1 is different from, linear electric motors water injecting pump 2
The valve seat of second travelling valve 25 is located at the top of valve ball, and the valve seat of the second standing valve 24 is located at the top of valve ball.
It is identical with linear dynamo oil pump 1 in the middle part of the outer wall of the second cylinder sleeve 23 of linear electric motors water injecting pump 2, it is also equipped with adjustable
The electric heating element of temperature, is specifically named as the second electric heating element 28, is provided with the second sheath 29 outside the second electric heating element 28, and second
The one end of sheath 29 is connected with the outer wall of the second standing valve 24, the outer wall of the other end of the second sheath 29 and second straight line motor stator 21
Connection, also, the junction and the second sheath 29 of the second sheath 29 and the second standing valve 24 and second straight line motor stator 21
Junction is provided with sealing ring.
The present invention provides a kind of single-well injection-production pump group, easy for installation in order to meet underground arrangement during concrete application
Reliable to require, the bottom of linear dynamo oil pump 1 is arranged on the top of oil water separator 3, and the top of linear dynamo oil pump 1 is with leading to
Flowline at well head A is connected, and the top of linear electric motors water injecting pump 2 is arranged on the bottom of oil water separator 3, linear electric motors water injecting pump 2
Bottom is connected with towards the water injection pipe at water filling layer B, and (oil water separator 3 is prior art, and its structure and operation principle are no longer superfluous
State).Crude oil is after the separation of oil water separator 3, oil stream to the tip position of oil water separator 3, on the C of profit line of demarcation, that is,
The bottom of linear dynamo oil pump 1, water flow to the bottom position of oil water separator 3, under the C of profit line of demarcation, that is, straight-line electric
The top of machine water injecting pump 2.Linear dynamo oil pump 1 work when, oil from the bottom of linear dynamo oil pump 1 to top (low pressure to
High pressure), give rise to ground well head A through flowline；When linear electric motors water injecting pump 2 works, water is from the top of linear electric motors water injecting pump 2
To bottom (low pressure to high pressure), underground implanted layer is recycled into through outlet pipe；By above-mentioned working method, single-well injection-production group is using straight
Line motor oil well pump 1 and linear electric motors water injecting pump 2 are respectively completed water filling, oil extraction operation.
With reference to the concrete structure of linear dynamo oil pump 1, the concrete operating principle of linear dynamo oil pump 1 is as follows：
When linear dynamo oil pump 1 works, first straight line electric mover 12 moves (up stroke) upwards, volume under oil well pump
Chamber Q11 volumes become big, pressure reduces, and the first standing valve 14 of the lower section of linear dynamo oil pump 1 is opened；Cavity volume on oil well pump
Q12 volumes diminish, pressure rise, and the first travelling valve 15 is closed, and the first standing valve 14 of the top of linear dynamo oil pump 1 is opened；
Output layer D separation oil enters cavity volume Q11 under oil well pump in this trip, and the oil on oil well pump inside cavity volume Q12 is lifted
To well head A.First straight line electric mover 12 moves downward (down stroke), under oil well pump cavity volume Q11 volumes diminish, pressure liter
Height, the first standing valve 14 of the lower section of linear dynamo oil pump 1 are closed；Cavity volume Q12 volumes become big on oil well pump, pressure reduces,
First travelling valve 15 is opened, and the first standing valve 14 of the top of linear dynamo oil pump 1 is closed.Under oil well pump inside cavity volume Q11
First profit path 16 of the oil through first straight line electric mover 12 enter on oil well pump in cavity volume Q12；First straight line motor
Mover 12 and so on moves, and realizes the oil pumping function of linear dynamo oil pump 1.
Motor is contributed as follows when linear dynamo oil pump 1 moves：
Down stroke：Fys+π/4D2PC=GD+GY+f1+π/4D2Py
Up stroke：Fyx+GD+GYQ+π/4(D2-d2)PQ=π/4 (D2-d2)PQ+f2
Fyx+(GD+GYQ)=f2
Fys--- power of the motor to first straight line electric mover 12 during 1 up stroke of linear dynamo oil pump
Fyx--- power of the motor to first straight line electric mover 12 during 1 down stroke of linear dynamo oil pump
PC--- underground output layer D pressure GD--- the gravity of first straight line electric mover 12
GY--- fluid column gravity in the top of the first standing valve 14 to the well head A flowlines of the lower section of linear dynamo oil pump 1
GYQ--- liquid gravity in cavity volume Q12 on oil well pump
Py--- the discharge pressure f of linear dynamo oil pump 11f2--- the internal diameter of the first cylinder sleeves of frictional force D--- 13
The diameter of the first profits of d--- path 16
When force analysis when being moved from linear dynamo oil pump 1 can be seen that up stroke, output layer D pressure PCWork
It is consistent that power thrusts go out force direction with motor, that is to say, that output layer D pressure energies are taken full advantage of during pump work.Down stroke
When, motor, which is contributed, only need to overcome frictional force, and the gravity G of first straight line electric mover 12D, cavity volume on oil well pump
Liquid gravity G in Q12YQReturn 12 1 downward power of first straight line electric mover, thus motor output very little, efficient energy-saving,
More crucially the first standing valve 14 of the top of linear dynamo oil pump 1 is closed during down stroke, avoids linear dynamo oil pump 1
Fluid column gravity G in the top of the first standing valve 14 of top to well head A flowlinesYThe inertia bigger to first straight line electric mover 12
Power.In fact, general pump hangs first standing valve 14 top of the height above 1000m or so, linear dynamo oil pump 1 to well head
A flowlines are very long, intraluminal fluid post gravity GYAlso it is very big, and the power that first straight line electric mover 12 need not be very big during down stroke,
If not fluid column gravity GYIsolation, then, will be in fluid column gravity G during first straight line 12 down stroke of electric moverYEffect is lower to be added
Speed motion, it is necessary to the downstream rate of first straight line electric mover 12 is constrained to one back-emf of linear electric motors, not so first
The stall of linear motor rotor 12 can cause underground equipment to damage, and back-emf endangered for motor it is very big.Meanwhile stop in power-off
When pump or for some reason termination of pumping, fluid column gravity G it also avoidYCause hurtling down for first straight line electric mover 12.Present invention installation
First standing valve 14 on cavity volume Q12 tops effectively solves fluid column gravity G on oil well pumpYTo first straight line electric mover
12 it is descending when influence, substantially increase the security of pump.
With reference to the concrete structure of linear electric motors water injecting pump 2, the concrete operating principle of linear electric motors water injecting pump 2 is as follows：
When linear electric motors water injecting pump 2 works, second straight line electric mover 22 moves (up stroke) upwards, volume under water injecting pump
Chamber Q21 volumes become big, pressure reduces, and the second standing valve 24 of the lower section of linear electric motors water injecting pump 2 is closed, cavity volume on water injecting pump
Q22 volumes diminish, pressure rise, and the second travelling valve 25 is opened, and the second standing valve 24 of the top of linear electric motors water injecting pump 2 is closed,
Water on water injecting pump in cavity volume Q22 enters under water injecting pump in cavity volume Q21 through the second profit path 26.Second straight line motor
Son 22 moves downward (down stroke), under water injecting pump cavity volume Q21 volumes diminish, pressure rise, the lower section of linear electric motors water injecting pump 2
Second standing valve 24 is opened；Cavity volume Q22 volumes become big on water injecting pump, pressure reduces, and the second travelling valve 25 is closed, linear electric motors
Second standing valve 24 of the top of water injecting pump 2 is opened.Output layer D separation waters enter cavity volume Q22 on water injecting pump, volume under water injecting pump
Water inside chamber Q21 is recycled into water filling layer B；Second straight line electric mover 22 and so on moves, and realizes the note of water injecting pump
Water function.
Motor is contributed as follows when linear electric motors water injecting pump 2 moves：
Up stroke：Fss+π/4(D2-d2)PQ=GD+GQ+f1+π/4(D2-d2)PQ
Fss=GD+GQ+f1
Down stroke:Fsx+GD+GYS+π/4D2PC=π/4D2Pz+f2
Fss--- power of the motor to second straight line electric mover 22 during linear electric motors 2 up stroke of water injecting pump
Fsx--- power of the motor to second straight line electric mover 22 during linear electric motors 2 down stroke of water injecting pump
PC--- underground output layer D pressure GD--- the gravity of second straight line electric mover 22
GYS--- the fluid column gravity of the top water inlet pipe of the second standing valve 24 of the top of linear electric motors water injecting pump 2
GYQ--- liquid gravity in cavity volume Q22 on water injecting pump
Pz--- the discharge pressure f of linear electric motors water injecting pump 21f2--- the internal diameter of the second cylinder sleeves of frictional force D--- 23
The diameter of the second profits of d--- path 26
When force analysis when being moved from linear electric motors water injecting pump 2 can be seen that down stroke, output layer D pressure PCWork
It is consistent that power thrusts go out force direction with motor, that is to say, that output layer D pressure energies are taken full advantage of during pump work.And the
The gravity G of two linear motor rotors 22D, liquid in pipe gravity GYS22 1 downward power of second straight line electric mover are returned, because
And motor output is greatly reduced, energy-conservation.During up stroke, motor, which is contributed, only need to overcome frictional force and second straight line electric mover 22
Liquid gravity in cavity volume Q22 on gravity, water injecting pump.The more crucially top of linear electric motors water injecting pump 2 during up stroke
Second standing valve 24 is closed, and avoids the top of the second standing valve 24 of the top of linear electric motors water injecting pump 2 to water inlet pipe fluid column gravity
GYSThe reaction force bigger to second straight line electric mover 22, efficient energy-saving.Meanwhile when powering off termination of pumping or termination of pumping for some reason,
Avoid fluid column gravity GYHurtling down for second straight line electric mover 22 is caused, substantially increases the security of pump.
For the first electric heating element 18 and the second electric heating element 28 installed in the first cylinder sleeve 13 and the outside of the second cylinder sleeve 23,
Because the first electric heating element 18 and the second electric heating element 28 are identical, electric heating element is briefly clearly hereafter referred to collectively as in order to state, electricity
The heating partial that thermal element and the first sheath 19 and the second sheath 29 are formed is relatively independent, and electric heating element is placed in first
In the sealing space of the sheath 19 of cylinder sleeve 13 and first and the second cylinder sleeve 23 and the second sheath 29 composition, electric heating element temperature is can
Adjust, the supply line of its supply line and linear electric motors part is also what is separated.The heat of electric heating element passes through the first cylinder sleeve
13 and second cylinder sleeve 23 be delivered to cavity volume Q11 under oil well pump, cavity volume Q21 and note under cavity volume Q12, water injecting pump on oil well pump
On water pump in cavity volume Q22, liquid is heated by each cavity volume, and heated liquid is given rise to well head A or by re-injection
During to water filling layer B, the wax deposition on all flow passage components surfaces that high-temp liquid flows through a little be melted, be washed until removing
Totally.
When the flow of linear dynamo oil pump 1 or linear electric motors water injecting pump 2, discharge pressure, current of electric etc. due to wax deposition,
When fouling causes unusual fluctuations, the corresponding sensor in underground can be transferred to data ground control system, ground control system
Plug-in automatic decision is powered to electric heating element, and is adjusted by the feedback signal automatic decision of the multiple temperature sensors in underground
The temperature of electric heating element, within the temperature range of pump liquid can be heated into setting, the liquid after being heated flows through straight-line electric
The flow passage components of machine oil well pump 1 or linear electric motors water injecting pump 2, the wax deposition on flow passage components surface is rinsed, to realize hot-washing wax remover
Purpose.By taking linear dynamo oil pump 1 as an example, during up stroke liquid enter under oil well pump during cavity volume Q11 by once plus
Heat, during down stroke, liquid enters on oil well pump during cavity volume Q12 by reheating, is then lifted to well head A.Liquid
Flow through part each valve group, to the surfaces such as well head A flowline wax deposition fouling a little be melted, be washed until clear
Remove.
Linear dynamo oil pump 1 or the running parameter of linear electric motors water injecting pump 2 normally stop heating afterwards.Certain linear electric motors are taken out
Electric heating element on oil pump 1 and linear electric motors water injecting pump 2 can work simultaneously, work when can also be different, specifically by straight line
What ground control segment corresponding to motor oil well pump 1 or linear electric motors water injecting pump 2 automatically controlled.To linear dynamo oil pump 1
Speech, viscosity of crude can be reduced by heating, improve its mobility, be more suitable for the lifting of viscous crude and high waxy oil.To straight-line electric
For machine water injecting pump 2, high temperature is also given to some macromolecule components (such as polymer, chemical agent) in return water and cracked,
Also dissipation has been carried out to the microorganism in return water, effective low pollution for avoiding return water to stratum.
Actually because down-hole liquid is to have certain temperature (typically at 50 DEG C or so) in itself, with linear dynamo oil pump
Exemplified by 1, the purpose of heating is in order that also can guarantee that temperature required for dewaxing (typically on 60 DEG C of left sides when liquid flows to well head A
It is right), thermal capacity need not be too big, so the power of electric heating element is nor very big.
The oil water separator 3 of single-well injection-production pump group is typically the graininess impurity such as sand grains in crude oil by Gravity Separation
Deng because quality it is big, can be deposited in the collection sandpipe of the bottom of oil water separator 3, it is almost miscellaneous without graininess in oily (water) after separation
Matter, the flow passage components in pump will not be caused with mechanical wear, the first seal assembly 17 and the second seal assembly that the present invention uses
27 can effectively prevent high-pressure leakage, improve pump efficiency, and the first seal assembly 17, the second seal assembly 27, the first cylinder sleeve
13rd, the second cylinder sleeve 23, the first travelling valve 15, the second travelling valve 25, the first standing valve 14 and the second standing valve 24 are function lists
One consumable accessory, its service life can easily be improved by the process meanses such as material, heat treatment, processing economy, so as to protect
The highly effective and safe for having demonstrate,proved pump is reliable.The first seal assembly 17, the second seal assembly 27, the first cylinder sleeve 13 and the second cylinder sleeve 23 of pump
It is all provided with being set to structure the same up and down, it is possible to increase the versatility of pump parts, be easily installed working service.
First travelling valve 15 and the second travelling valve 25 may be mounted at the bottom of linear motor rotor, can also be arranged on straight
The top of line electric mover, it can also be arranged in the profit path of linear motor rotor.Even can be linear motor rotor
Disconnecting mounted in any position in centre of linear motor rotor, can realize the function of travelling valve.
Single-well injection-production linear dynamo oil pump 1 and linear electric motors water injecting pump 2 are in underground work, by being fitted installed in underground
When the signals such as the displacement on the pressure of position, flow, profit liquid level sensor, oil-water interface tool and pump, velocity sensor pass
Be defeated by ground control system, dynamic accurately by changing the haul distance of pump, pump speed adjusts linear dynamo oil pump 1 respectively and
The parameters such as the flow of linear electric motors water injecting pump 2, to adapt to the requirement of downhole parameters dynamic change.In the present invention outside cylindric pump
Shape adds center oil water passage, easily in underground mounting arrangements.
The principle and embodiment of the present invention are set forth invention applies specific case, above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.To sum up, this specification content should not manage
Solve as limitation of the present invention.
Claims (10)
- A kind of 1. single-well injection-production pump group, it is characterised in that：Including linear dynamo oil pump, linear electric motors water injecting pump and it is arranged at institute The oil water separator between linear dynamo oil pump and the linear electric motors water injecting pump is stated, the linear dynamo oil pump is arranged at The oil water separator top, the linear electric motors water injecting pump are arranged at the oil water separator bottom；The linear dynamo oil pump includes first straight line motor stator, first straight line electric mover, the first cylinder sleeve, the first fixation Valve and the first travelling valve, the first straight line motor stator both ends are connected with first cylinder sleeve and described first in turn and fixed Valve, one end endoporus of the first cylinder sleeve both ends respectively with the first straight line motor stator and first standing valve are connected, The endoporus of first cylinder sleeve communicates with the endoporus of the first straight line motor stator and first standing valve, and described first is straight Line electric mover is the circular tube structure that an inside carries the first profit path, and first travelling valve is arranged at the first straight line Electric mover bottom, the first straight line electric mover are arranged at the first straight line motor stator and the first straight line motor In the through hole of first cylinder sleeve at stator both ends, the outer wall both ends of the first straight line electric mover and first cylinder sleeve it Between be provided with the first seal assembly, the valve seat of first travelling valve is located at valve ball bottom, the valve seat position of first standing valve In valve ball bottom；The linear electric motors water injecting pump includes second straight line motor stator, second straight line electric mover, the second cylinder sleeve, the second fixation Valve and the second travelling valve, the second straight line motor stator both ends are connected with second cylinder sleeve and described second in turn and fixed Valve, one end endoporus of the second cylinder sleeve both ends respectively with the second straight line motor stator and second standing valve are connected, The endoporus of second cylinder sleeve communicates with the endoporus of the second straight line motor stator and second standing valve, and described second is straight Line electric mover is the circular tube structure that an inside carries the second profit path, and second travelling valve is arranged at the second straight line Electric mover bottom, the second straight line electric mover are arranged at the second straight line motor stator and the second straight line motor In the through hole of second cylinder sleeve at stator both ends, the outer wall both ends of the second straight line electric mover and second cylinder sleeve it Between be provided with the second seal assembly, the valve seat of second travelling valve is located at the top of valve ball, the valve seat position of second standing valve At the top of valve ball.
- 2. single-well injection-production pump group according to claim 1, it is characterised in that：The is provided with the middle part of first outer wall of cylinder jachet One electric heating element, the first sheath is provided with outside first electric heating element, and described first sheath one end is fixed with described first The outer wall connection of valve, the first sheath other end are connected with the outer wall of the first straight line motor stator.
- 3. single-well injection-production pump group according to claim 2, it is characterised in that：First sheath and first standing valve Junction and the junction of first sheath and the first straight line motor stator be provided with sealing ring.
- 4. single-well injection-production pump group according to claim 3, it is characterised in that：First electric heating element is temperature controllable electric heating Element.
- 5. single-well injection-production pump group according to claim 1, it is characterised in that：The is provided with the middle part of second outer wall of cylinder jachet Two electric heating elements, the second sheath is provided with outside second electric heating element, and described second sheath one end is fixed with described second The outer wall connection of valve, the second sheath other end are connected with the outer wall of the second straight line motor stator.
- 6. single-well injection-production pump group according to claim 5, it is characterised in that：Second sheath and second standing valve Junction and the junction of second sheath and the second straight line motor stator be provided with sealing ring.
- 7. single-well injection-production pump group according to claim 6, it is characterised in that：Second electric heating element is temperature controllable electric heating Element.
- 8. single-well injection-production pump group according to claim 1, it is characterised in that：The linear dynamo oil pump both ends it is described First cylinder sleeve is symmetrical arranged.
- 9. single-well injection-production pump group according to claim 1, it is characterised in that：The linear electric motors water injecting pump both ends it is described Second cylinder sleeve is symmetrical arranged.
- 10. single-well injection-production pump group according to claim 1, it is characterised in that：Also include being separately positioned on the straight-line electric Displacement transducer and velocity sensor on machine oil well pump and the linear electric motors water injecting pump, institute's displacement sensors and the speed Degree sensor is connected with a control system.
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| CN109973371A (en) * | 2019-05-13 | 2019-07-05 | 西南石油大学 | Tandem double acting injection-extraction pump for high-water-cut oil-producing well |
| CN110984913A (en) * | 2018-03-20 | 2020-04-10 | 刘玉友 | Self-generating wax-proof device and method for screw pump oil well |
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| CN107387031B (en) | 2019-03-29 |
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