CN105201482B - Liquid stream cavitation apparatus, system and method - Google Patents
Liquid stream cavitation apparatus, system and method Download PDFInfo
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- CN105201482B CN105201482B CN201510683453.3A CN201510683453A CN105201482B CN 105201482 B CN105201482 B CN 105201482B CN 201510683453 A CN201510683453 A CN 201510683453A CN 105201482 B CN105201482 B CN 105201482B
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Abstract
The present invention discloses a kind of liquid stream cavitation apparatus, it is characterised in that including housing, including top shell；The belly housing being detachably connected with top shell；The bottom shell being detachably connected with belly housing；It working medium, freely can actively be arranged in the belly housing, act on the liquid stream flowed through so that it produces cavitation；Top barrier, is arranged in top shell, for preventing working medium from leaving belly housing from top；Bottom barrier, is arranged in bottom shell, for preventing working medium from leaving belly housing from bottom.
Description
Technical field
The present invention relates to oil extraction field, is a kind of liquid stream cavitation apparatus, system and method.
Background technology
Current oil field increases oil and mainly uses two kinds of technologies, when hydraulic fracturing technology, second, ultrasonic cavitation technology.
Hydraulic fracturing is that fracturing fluid injection oil reservoir is manufactured into a trunk crack, to reach the increasing oil skill for changing oil stream fluidised form
Art.The 1980s is the stage more important in hydraulic fracturing development history, after be increasingly becoming oil gas, particularly low-permeability oil
The important technical of gas exploration development field.Hydraulic fracturing increasing yield：When ground high-pressure pump group by high viscosity liquid with super
Cross in the discharge capacity injection well of formation absorption ability, exceed crustal stress and tensile strength of rock near the borehole wall in pressure caused by shaft bottom
Pressure after, i.e., form crack in the earth formation.As in the liquid injection stratum with proppant, gradually extension forms tool forward in crack
There is the sand packed fracture of certain length, width and height.There is higher flow conductivity in the crack, changes oil and gas flow fluidised form.
However, hydraulic fracturing has the disadvantage that：(1) complex process, operating cost are high.Hydraulic fracturing is one rigorous
System engineering, if recognized reservoir geology situation, deficiency, well and story selecting are improper, fracturing fluid selection is improper, proppant selects not
When the design of, fracturing parameter is unreasonable, scope of construction item is improper, pressure after discharge opeing improper measures may all cause pressing crack construction to fail
Or effect of increasing production is reduced, What is more may bring to the modification scenario in oil gas field later stage and have a strong impact on.Stimulation technology
A high investment, the technology of excessive risk, the operating cost of individual well typically between hundreds thousand of to millions of members, heavy duty service into
This even ten million remaining yuan.(2) it is serious to oil well and formation contaminant.If fracturing fluid selection is improper, cause stratum clay mineral swollen
Swollen, emulsification of crude oil, mechanical admixture are brought into stratum, the generation precipitation etc. that is incompatible with stratum water may all damage to stratum；
For acid fracturing, liquid can also damage to reservoir, and the corrosion inhibition difference of acid solution can also cause to construction equipment and tubing string
Serious corrosion.Fracturing work is a kind of operations involving high pressure, the lives and properties and life that working various chemical agents can also be to people
State environment causes serious threat.(3) destruction to oil well and stratum is very big.If pressure break is improper, the sudden and violent property water of oil well can be caused
The serious consequence with idle water filling is flooded, or the oil reservoir top neighbouring water-bearing layer or containing pneumatic jack presses off.In addition, improperly arrange
Liquid may give the extent of injury of reservoir to increase, and may cause proppant backflow, and then stratum and oil well be caused permanent broken
It is bad.(4) introducing in artificial trunk crack exacerbates the anisotropism of reservoir, and this may bring unfavorable shadow to the exploitation of oil-gas reservoir again
Ring.
Ultrasonic oil production technology is one of tertiary oil recovery technology that recent decades grow up.Ultrasonic cavitation de-plugging increases oily skill
Art is high-power ultrasonics block releasing technique.New type ultrasonic increases oil system mainly by magnetic orientation system, special transmission cable, big work(
Rate ultrasonic electrical signal emitter and ultrasonic wave electroacoustic transducer etc. form.It utilizes ground on-vehicle large power supersonic wave transmitter
Caused highpowerpulse electric oscillation signal, by special transmission cable, pulse electric oscillation signal is transferred to the piezoelectricity of oil reservoir
On ceramic electroacoustic transducer, ultrasonic wave is converted into through electroacoustic transducer, is injected in oil bearing bed.Oil is produced by ultrasonication
The nearly well oil reservoir of well, water injection well, makes the physical property of fluid and fluidised form in oil reservoir change, and improves the circulation bar of shaft bottom near wellbore zone
Part and permeability, the blocking of producing well, water injection well is released, Discharge rate, crude output and water injection rate are improved, to reach volume increase mesh
's.
However, ultrasonic cavitation has the disadvantage that：(1) ultrasonic cavitation is only used for the de-plugging of near wellbore zone.Liquid medium
Produce cavitation bubble, it is desirable to which ultrasonic wave has certain intensity, and the bigger plugging removal effect of ultrasonic power is better.But ultrasonic wave
The rate of decay is exceedingly fast, and there are some researches show the sound intensity decays to 45% at sound source at the borehole wall, and pore media geometrical model radius is
10% at sound intensity decay to the borehole wall at 1 meter.Therefore, cavitation effect caused by ultrasonic wave can only act near wellbore zone, most
Big only 15 meters, therefore action effect is limited of operating radius.(2) cavitation zone is in first valve state, is formed on cavitation device periphery
Cavitation zone (or air pocket) be limited in scope, with the rise of hydrostatic (outside) pressure, in deep oil well under high hydrostatic pressure nothing
Method interrupts liquid stream and forms air pocket.According to cavitation numerical requirements, to make liquid stream produce gap, it is necessary to high speed force feed liquid
Body, but be not that can obtain this hypervelocity in all cases, especially in deep-well or lengthening pipeline；Outside very high
Under portion's hydrostatic pressure, such as in deep-well, cavitation effect can not be obtained using ultrasonic wave.(3) time restriction, operation effect are subject to processing
Fruit is limited.After ultrasonic wave cumulative processing time has a great influence to plugging removal effect, but processing time was more than 60 minutes, plugging removal effect increases
Adduction is not notable；Decay in the higher communication process of ultrasonic frequency bigger, plugging removal effect is deteriorated.(4) complete sets of Techniques equipment is complicated,
Operating cost is high, requires higher to operating environment.(5) it is not suitable for the oil well that gradient is more than 45 degree.
The content of the invention
It is an object of the invention to propose a kind of liquid stream cavitation apparatus, system and method for being used to improve oil recovery,
For solving at least one technical problem in background technology.
First aspect present invention provides a kind of liquid stream cavitation apparatus, including
Housing, including
Top shell；
The belly housing being detachably connected with top shell；
The bottom shell being detachably connected with belly housing；
It working medium, freely can actively be arranged in the belly housing, act on the liquid stream flowed through so that it produces cavitation；
Top barrier, it is arranged in the top shell, for preventing the working medium from leaving the belly housing from top；
Bottom barrier, it is arranged in the bottom shell, for preventing the working medium from leaving the belly housing from bottom.
In a specific embodiment, liquid stream cavitation apparatus is additionally included in below working medium, in the housing above the barrier of bottom
The pad and pad spring of setting, are moved when to liquid stream cavitation with working medium.
In a specific embodiment, the working medium is multiple.
In a specific embodiment, the working medium be shaped as it is one of following：Spherical, cylindricality, taper and annular.
In a specific embodiment, the plurality of working medium is spherical, cylindricality, taper and annular working medium or its combination.
In a specific embodiment, liquid stream cavitation apparatus also includes multiple compartments, is arranged in belly housing, each other edge
Liquid flow path direction separates, wherein each compartment accommodates the packet of multiple working medium wherein.
In a specific embodiment, working medium is solid or which is provided with the through hole that liquid stream passes through.
In a specific embodiment, liquid stream cavitation apparatus also includes drainage trough, is arranged on bottom shell inwall, is used for
Liquid stream is accelerated to flow out the liquid stream cavitation apparatus.
In a specific embodiment, the housing exterior walls are cylinder or polygon.
In a specific embodiment, the reinforcing member for strengthening the casing rigidity is provided with the housing exterior walls.
Second aspect of the present invention provides a kind of liquid stream cavitation system, in the pipeline that recovers the oil, wherein oil recovery pipeline to include oil
Pipe and sleeve pipe, the liquid stream cavitation system include pumping installations, fluid reservoir, liquid stream cavitation apparatus according to a first aspect of the present invention with
And for monitoring the measuring instrument of liquid stream job parameter, wherein
The pumping installations is used for the oil pipe being pumped into the circulation fluid in fluid reservoir by measuring instrument in oil recovery pipeline；
The liquid stream cavitation apparatus is connected to the oil pipe bottom, corresponding to the position of pending point in oil reservoir；
Pumping installations is by circulation fluid through in the sleeve pipe blowback fluid reservoir.
Third aspect present invention provides a kind of method that system using second aspect of the present invention carries out liquid stream cavitation, including
Step：
The circulation fluid in fluid reservoir is pumped into oil pipe in oil recovery pipeline by measuring instrument by pumping installations；
Liquid stream carries out cavitation by liquid stream cavitation apparatus；And
The pumping installations is by circulation fluid through in sleeve pipe blowback fluid reservoir.
In a specific embodiment, this method also includes inputting cavitation nucleus to the liquid sent.
In a specific embodiment, the cavitation nucleus is bubble, disperse solid phase particles, insoluble gel or its combination.
Liquid stream cavitation apparatus can be acted on oil-producing formation by the system of the present invention, can be improved the oil production of producing well and be oozed
Saturating rate, shaft bottom is may also act on to strengthen detritus process, while can be used to the elimination of micro-organisms, the lamination of contact surface is removed, to gold
Belong to the damage of eroding property, accelerate to chemically react, solid phase particles and high-molecular compound in dispersing liquid, emulsify insoluble matter
Matter, it may further be used to carry out effective internal soundness exchange during other.
The technology of the present invention goes for oil field and brought in a well He Laojing " resurrection ", belongs to pure physics using liquid circulation
Method, any additive need not be added in liquid, without any pollution, technique is simple to operation, green, in oil reservoir reconnaissance
Operation, ensure the security on stratum；Securely and reliably, same oil well can operation repeatedly, the lasts phase length.On the other hand, originally
The system of invention is as a result of liquid circulation mode so that operation effectiveness radiation scope expands, so as to overcome ultrasonic cavitation
It is bad or even the defects of cavitation can not be produced in the big cavitation effect of hydrostatic pressure.Further, system of the invention is due to cavitation dress
Small volume is put, the bottom of oil pipe can be directly arranged at, oil pipe can reach part, and it can also be reached, so being applied to High angle
Well even horizontal well.
Brief description of the drawings
By the description to the embodiment of the present invention referring to the drawings, above-mentioned and other purposes of the invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the schematic diagram of liquid stream cavitation system according to an embodiment of the invention.
Fig. 2A shows the profile of tail end turbulent flow type liquid stream cavitation apparatus according to an embodiment of the invention.
Fig. 2 B show a variant of structure shown in Fig. 2A, and wherein working medium is solid.
A variant of structure shown in Fig. 2A is shown respectively in Fig. 2 C-E, and the wherein shape of working medium is different.
Fig. 3 shows a variant of structure shown in Fig. 2A, wherein being to be replaced with tail end pad spring formula structure with Fig. 2A difference
For tail end turbulent flow type structure.
Fig. 4 shows the profile of multiple working medium structure according to an embodiment of the invention.
Fig. 5 shows the profile of mixing shape working medium structure according to an embodiment of the invention.
Fig. 6 shows a variant of structure shown in Fig. 4, wherein being with Fig. 4 difference with compartment.
Fig. 7-9 shows the liquid stream cavitation apparatus according to an embodiment of the invention with reinforcing member.
It should be noted that this specification accompanying drawing is not drawn to draw, and only schematical purpose, therefore, no
It should be understood any limitation on the scope of the present invention and constraint.In the accompanying drawings, similar part is with similar accompanying drawing mark
Number mark.
Embodiment
It is described in detail referring to the drawings, the accompanying drawing forms the part of the present invention, and in the present invention, it is attached
Figure is showed by the explanation of the specific embodiment to implementing the present invention.It should be understood that without departing from the scope of the present invention
In the case of can use other embodiments and can carry out change in structure or in logic.For example, for an implementation
The feature released or described is illustrated to can be used for other embodiments or combined with other embodiments to generate another embodiment.It is anticipated
Figure is that the present invention includes such modifications and variations.These examples are described with specific sentence, but they are understood not to
Limitation to scope of the appended claims.Accompanying drawing is merely for explanatory purpose and is not necessarily drawn to scale.Unless stated otherwise,
For purposes of clarity, corresponding element is adopted in different drawings is indicated by the same numerals.
Term " has ", " containing ", " including ", and " including " etc. is open, and they represent described structure, element
Or the presence of feature, but it is not precluded from additional element or feature.
Petroleum reserves in oil reservoir mainly has two kinds：Crack reserves (~0.3) and capillary interstice reserves (~0.7).Hair
Capillary pore reserves are not easy to exploit, and this is current global average recovery ratio where the reason for 30% or so.Fluid impact ripple is empty
Change method mainly improves recovery ratio by gathering capillary interstice reserves, i.e., producing cavitation by special purpose device (cavitation device) makees
With making the bubble to be formed crushing failure at high speed and continuously burst in a liquid, cause hydraulic blow in point of burst, impact around wave direction and expand
Dissipate, a large amount of microcracks are manufactured in oil reservoir, so as to open oil flow channel, improve permeability and then improve oil recovery.
Based on this principle, as shown in figure 1, the liquid stream cavitation system of the present invention include pumping installations 100, fluid reservoir 105,
Liquid stream cavitation apparatus 110 and measuring instrument 115.
Wherein, the circulation fluid in fluid reservoir 105 is pumped into existing flow string by pumping installations 100 by measuring instrument 115
Oil pipe 116 in road 120.
Before actual job, first, according to oil well condition and the (operation of discharge capacity, each setting of various job parameters
Time) change, set circulation fluid discharge capacity.In operation, various parameters are carried out according to the number of degrees that measuring instrument 115 characterizes real-time
Adjustment.
Liquid stream cavitation apparatus 110 is connected to the bottom of oil pipe 116, corresponding to the position of pending point 130 in oil reservoir 125.
The liquid stream for entering liquid stream cavitation apparatus 110 from oil pipe bottom is carried out cavitation by liquid stream cavitation apparatus 110.Afterwards, liquid stream enters and adopted
The sleeve pipe 135 of oil pipe line 120.Pumping installations 100 is by circulation fluid through in the blowback fluid reservoir 105 of sleeve pipe 135.
Wherein pending point 130 refers to the oil producing operation point selected in advance, and figure 1 illustrates multiple.It is specific at one
In example, cavitation apparatus 110 arrives the position of minimum process points with oil pipe 116 under first, and cavitation is carried out to liquid at this, to be done
After operation, the supreme setting of cavitation apparatus is moved up, repeats operation.Certainly, those skilled in the art are according to of the invention easy
Understand, first can carry out cavitation with reverse operation in uppermost process points position, move down cavitation apparatus afterwards, it is then empty
Change.
The liquid stream cavitation system of the present invention is circulated using liquid stream, and the concussion of liquid stream cavitation apparatus 110 produces a shock-wave field,
Cavitation operation makes the bubble to be formed crushing failure at high speed and continuously burst in a liquid, and hydraulic blow is caused in point of burst.Shock wave
Active force can compare far from general ultrasonic wave.The wave source of shock wave is liquid stream cavitation apparatus.Shock wave is passing through oil reservoir base
Rarefaction wave area and condensation wave area are produced during rock in capillary interstice space, shock wave passes through the alternating of dilatational wave in admixture of gas
Conduction, makes to produce small cavitation bubble in oil reservoir.Cavitation bubble blast point source explosion, in turn again cause next ripple, so
Produce chain reaction.Microcrack is now formed inside hard formation, microcrack is continuously increased along on the outside of oil reservoir, is formed oil-collecting and is led to
Road.
In a specific embodiment, it is pump truck for the ease of field operation, pumping installations 100, fluid reservoir 105 is placed on
On pump truck.
In a specific embodiment, circulation fluid is water.
In a specific embodiment, it is the forming process in the deep down-hole fluid flow gap of simplification, can be to the circulation fluid of institute's force feed
Cavitation nucleus is inputted, its form has bubble, disperse solid phase particles or insoluble gel etc..
Next, emphasis is described to the composition of the liquid stream cavitation apparatus 110 of the present invention.
Fig. 2A gives a specific embodiment of the liquid stream cavitation apparatus 110 of the present invention, wherein the liquid stream cavitation apparatus
110 include housing, and specifically, the housing is by top shell 1000, the belly housing being detachably connected with top shell 1000
1005th, the bottom shell 1010 being detachably connected with belly housing 1005.In a specific example, top shell 1000, abdomen
Portion's housing 1005 and bottom shell 1010 can form inclined-plane in the same direction by the way of clamping, specifically between two housings, such as scheme
Shown in 2A, it is engaged naturally after nested.It is existing when housing is installed to heat the housing for receiving insertion, housing will be inserted into after expansion and will be inserted
Enter.In another specific example, housing is that screw socket is connected or riveted.
The liquid stream cavitation apparatus 110 also includes：Working medium 1015 in belly housing 1005 is arranged at, working medium can be in belly housing
Freely activity (not having any annexation mechanically with housing) in 1005, the liquid stream cavitation apparatus is flowed into for acting on
Liquid stream so that its produce cavitation.Working medium concussion produces a shock-wave field, and cavitation operation makes the bubble to be formed fast in a liquid
Speed is extruded and continuously burst, and hydraulic blow is caused in point of burst.Shock wave is when by oil reservoir basement rock in capillary interstice space
Produce rarefaction wave area and condensation wave area, shock wave conducts in admixture of gas by the alternating of dilatational wave, makes to produce in oil reservoir micro-
Small cavitation bubble.Cavitation bubble blast point source explosion, in turn again cause next ripple, so produce chain reaction.It is now hard
Microcrack is formed inside stratum, microcrack is continuously increased along on the outside of oil reservoir, forms oil-collecting passage.
As shown in Figure 2 A, the working medium 1015 is provided with the through hole 1020 that liquid stream passes through, and enables to cavitation effect more preferably.
It is highly preferred that the direction of through hole is not only the direction that liquid stream enters, can also be in the other direction.Of course for reduction technique
Difficulty and reduce cost, the working medium 1015 can be it is solid, as shown in Figure 2 B.
Alternatively, the inner chamber of housing 1060 diameter change on the whole, diffusing hole 1065 is done to surrounding at shell reducing, such as
Shown in Fig. 2 B.So, cavitation effect can further be increased.
In Fig. 2A specific example, working medium 1015 is spherical, and the spherical profile is shown in figure.
The liquid stream cavitation apparatus 110 also includes：Top barrier 1025, it is arranged in the top shell, for preventing the work
Matter leaves the belly housing from top, that is to say, that for prevented when liquid stream incides and excites working medium to move in working medium working medium from
Leave housing in top；Bottom barrier 1030, it is arranged in the bottom shell, for preventing the working medium from leaving the belly shell from bottom
Body, that is to say, that for preventing working medium from exitting from the bottom housing when liquid stream incides and excites working medium to move in working medium.At one
In specific example, top barrier is integrally formed with top shell.In a specific example, bottom barrier and bottom shell one
Formed.
In Fig. 2A specific example, the liquid stream cavitation apparatus 110 also includes：Drainage trough 1035, is arranged at bottom shell
On inwall, for accelerating liquid stream to flow out the liquid stream cavitation apparatus.
In Fig. 2A specific example, the profile of the liquid stream cavitation apparatus 110 is cylinder.
Fig. 2 C, 2D and 2E are the variants of Fig. 2A structures, differ only in the shape of working medium.Specifically, the work in Fig. 2 C
Matter 1015 is cylinder, it is preferable that along the cylinder of liquid flow path direction.Working medium in Fig. 2 D is taper, it is preferable that along liquid flow path direction
It is tapered.Working medium in Fig. 2 E is annular, it is preferable that it is the annular in the plane vertical with liquid flow path direction, similar bread
The shape of circle.
It will be understood by those skilled in the art that although the working medium in Fig. 2 C, 2D and 2E has through hole 1020, but it can be
Solid.
Fig. 3 is the variant of Fig. 2A structures, and difference is to be provided with the freely pad 1040 of activity and pad spring in working medium downstream
1045, that is to say, that pad 1040 and pad spring are provided with the housing below working medium 1015, above bottom barrier 1030
1045.In the present invention, our this structures with pad and pad spring are referred to as tail end pad spring formula structure.Comparatively, figure is claimed
Structure in 2A-D is tail end turbulent flow type structure.In tail end pads spring formula structure, when to liquid stream cavitation, working medium 1015, pad
1040 vibrate together with pad spring 1045, so as to strengthen the effect of cavitation.
In Fig. 3 specific example, drainage trough can also be increased.
Fig. 4 shows that working medium 1015 can be multiple embodiments.Multiple working medium be limited in top barrier and bottom every
In housing between gear, when to liquid stream cavitation, multiple working medium are mutually collided, and enhance cavitation effect.It should be noted that it is
Make those skilled in the art more than you know, a portion working medium is shown in the form of complete body, and another part is with section shape
Formula is shown.
It will be understood by those skilled in the art that the plurality of working medium can be spherical, cylindricality, taper and annular working medium or its group
Close.As shown in figure 5, the combination of as annular working medium and spherical working medium.Wherein, spherical working medium is arranged in the ring of annular working medium.
Fig. 6 is the variant of Fig. 4 structures, and difference is that the liquid stream cavitation apparatus 110 also includes multiple compartments 1050, is arranged at
In belly housing, separated each other along liquid flow path direction next door 1055, wherein the packet of the plurality of working medium is contained in it by each compartment
In.So, only each working medium in same packet is mutually collided, accelerates the cavitation effect along liquid flow path direction.
In one particular embodiment of the present invention, housing exterior walls include but is not limited to cylinder, polygon (for example, six
Side shape or octagon).That is, the housing exterior walls in structure and its variant shown in Fig. 2A-E, 3-6 can be cylinder
Or polygon.
In one particular embodiment of the present invention, particularly in the example of deep-well, due to depth it is deeper, well
Internal pressure is bigger, and the reinforcing member for strengthening the casing rigidity can be provided with housing exterior walls.That is, Fig. 2A-
E, the structure shown in 3-6 and its housing exterior walls in variant can be provided with the reinforcing member for strengthening the casing rigidity.Figure
7th, 8 and 9 show the structure for having located three kinds of reinforcing members 1055 respectively, and the reinforcing member wherein shown in Fig. 7 is screw thread shape, adding shown in Fig. 8
Firmware is the plate muscle shape along fluid flow direction, and the reinforcing member shown in Fig. 9 is hexagon.
It will be appreciated by those skilled in the art that in the case where not violating logic, the feature of above-mentioned various structures can phase
Mutually combination.
The invention also discloses a kind of method for carrying out liquid stream cavitation using said apparatus, system, comprise the following steps：By
Circulation fluid in fluid reservoir is pumped into the oil pipe in oil recovery pipeline by pumping installations by measuring instrument；Liquid stream passes through liquid stream cavitation
Device carries out cavitation；And the pumping installations by circulation fluid through in sleeve pipe blowback fluid reservoir.
In a specific embodiment, this method also includes inputting cavitation nucleus to the liquid pumped.Preferably, the cavitation
Core is bubble, disperse solid phase particles, insoluble gel or its combination.
Liquid stream cavitation apparatus can be acted on oil-producing formation by the system of the present invention, can be improved the oil production of producing well and be oozed
Saturating rate, shaft bottom is may also act on to strengthen detritus process, while can be used to the elimination of micro-organisms, the lamination of contact surface is removed, to gold
Belong to the damage of eroding property, accelerate to chemically react, solid phase particles and high-molecular compound in dispersing liquid, emulsify insoluble matter
Matter, it may further be used to carry out effective internal soundness exchange during other.
The technology of the present invention goes for oil field and brought in a well He Laojing " resurrection ", belongs to pure physics using liquid circulation
Method, any additive need not be added in liquid, without any pollution, technique is simple to operation, green, in oil reservoir reconnaissance
Operation, ensure the security on stratum；Securely and reliably, same oil well can operation repeatedly, the lasts phase length.On the other hand, originally
The system of invention is as a result of liquid circulation mode so that operation effectiveness radiation scope expands, so as to overcome ultrasonic cavitation
It is bad or even the defects of cavitation can not be produced in the big cavitation effect of hydrostatic pressure.Further, system of the invention is due to cavitation dress
Small volume is put, the bottom of oil pipe can be directly arranged at, oil pipe can reach part, and it can also be reached, so being applied to High angle
Well even horizontal well.
The present invention is described above by reference to embodiments of the invention.But these embodiments are used for the purpose of saying
Bright purpose, and be not intended to limit the scope of the present invention.The scope of the present invention is limited by appended claims and its equivalent.
The scope of the present invention is not departed from, those skilled in the art can make a variety of substitutions and modifications, and these substitutions and modifications should all fall
Within the scope of the present invention.
Claims (9)
1. a kind of liquid stream cavitation apparatus, including housing, it is characterised in that the housing includes
Top shell；
The belly housing being detachably connected with top shell；
Between the bottom shell being detachably connected with belly housing, wherein top shell and belly housing and belly housing and bottom
Inclined-plane in the same direction is formed between portion's housing, is engaged naturally after nested；
It multiple working medium, freely can actively be arranged in the belly housing, act on the liquid stream flowed through so that it produces cavitation；Top
Portion's barrier, it is arranged in the top shell, for preventing the working medium from leaving the belly housing from top；
Bottom barrier, it is arranged in the bottom shell, for preventing the working medium from leaving the belly housing from bottom, wherein the plurality of
Working medium is limited in the housing between top barrier and bottom barrier；
Multiple compartments, it is arranged in the belly housing, is separated each other along liquid flow path direction, wherein each compartment divides the plurality of working medium
Group accommodates wherein.
2. liquid stream cavitation apparatus according to claim 1, it is characterised in that also include
The pad and pad spring set in housing below the working medium, above the bottom barrier, with working medium when to liquid stream cavitation
Move together.
3. according to the liquid stream cavitation apparatus described in claim 1 or 2, it is characterised in that
Being shaped as the working medium is one of following：Spherical, cylindricality, taper and annular.
4. according to the liquid stream cavitation apparatus described in claim 1 or 2, it is characterised in that
The plurality of working medium is spherical, cylindricality, taper and the annular working medium combination of two or more.
5. liquid stream cavitation apparatus according to claim 1 or 2, it is characterised in that
The working medium is solid or which is provided with the through hole that liquid stream passes through.
6. liquid stream cavitation apparatus according to claim 1 or 2, it is characterised in that also include
Drainage trough, it is arranged on the bottom shell inwall, for accelerating liquid stream to flow out the liquid stream cavitation apparatus.
7. liquid stream cavitation apparatus according to claim 1 or 2, it is characterised in that
The outer wall of the housing is cylinder or polygon.
8. liquid stream cavitation apparatus according to claim 1 or 2, it is characterised in that
The reinforcing member for strengthening the casing rigidity is provided with the outer wall of the housing.
A kind of 9. method that liquid stream cavitation is carried out using liquid stream cavitation system, it is characterised in that the liquid stream cavitation system is used to recover the oil
In pipeline, wherein oil recovery pipeline includes oil pipe and sleeve pipe, and the liquid stream cavitation system includes pumping installations, fluid reservoir, according to right
It is required that the liquid stream cavitation apparatus any one of 1-8 and the measuring instrument for monitoring liquid stream job parameter, wherein
This method comprises the following steps：
The circulation fluid in fluid reservoir is pumped into oil pipe in oil recovery pipeline by measuring instrument by pumping installations；
Liquid stream carries out cavitation by liquid stream cavitation apparatus；And
The pumping installations by circulation fluid through in sleeve pipe blowback fluid reservoir, wherein
The concussion of liquid stream cavitation apparatus produces a shock-wave field, and cavitation operation makes the bubble to be formed crushing failure at high speed and company in liquid stream
Continuous explosion, hydraulic blow is caused in point of burst, shock wave produces rarefaction wave when by oil reservoir basement rock in capillary interstice space
Area and condensation wave area, shock wave conduct by the alternating of dilatational wave in admixture of gas, make to produce small cavitation gas in oil reservoir
Bubble, cavitation bubble cause next ripple again in turn, produce chain reaction, make to form fine fisssure inside hard formation in blast point source explosion
Seam, microcrack are continuously increased along on the outside of oil reservoir, form oil-collecting passage.
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| CN106761650A (en) * | 2017-03-13 | 2017-05-31 | 邹积鹏 | Oil, many microcrack pressure break block releasing techniques of well |
| CN107143320A (en) * | 2017-06-16 | 2017-09-08 | 刘杰 | Liquid stream cavitation device, liquid stream cavitation system and liquid stream cavitation process |
| CN107782663B (en) * | 2017-11-27 | 2023-07-25 | 清华大学 | Convenient, easy-to-use and controllable cavitation visual experimental device and experimental method |
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| CN110761762B (en) * | 2018-07-27 | 2021-08-27 | 中国石油化工股份有限公司 | Method for increasing fracturing volume of tight sandstone oil reservoir |
| CN111594128B (en) * | 2020-07-08 | 2022-02-01 | 西南石油大学 | Rotary downhole cavitation generator |
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| CN1190586C (en) * | 2002-09-13 | 2005-02-23 | 中国石化胜利油田有限公司采油工艺研究院 | Hydro-impact broken down method and device for oil-water well |
| CN101705789B (en) * | 2006-07-12 | 2012-11-21 | 中国石油大学(北京) | Hydraulic pulse cavitation jet well drilling method |
| US8235102B1 (en) * | 2008-03-26 | 2012-08-07 | Robertson Intellectual Properties, LLC | Consumable downhole tool |
| CN201386522Y (en) * | 2009-04-20 | 2010-01-20 | 大庆玖兴技术服务有限公司 | Self-advancing high-pressure cavitating jet washing device |
| RU2478778C2 (en) * | 2010-05-19 | 2013-04-10 | Валерий Петрович Дыбленко | Treatment method of productive formation, and downhole equipment for its implementation |
| CN104043382A (en) * | 2014-06-23 | 2014-09-17 | 清华大学 | Hydrodynamic cavitation generating device |
| CN205089301U (en) * | 2015-10-20 | 2016-03-16 | 刘杰 | Liquid stream cavitation device and system |
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