CN105221120A - Oil well ramp metering device - Google Patents
Oil well ramp metering device Download PDFInfo
- Publication number
- CN105221120A CN105221120A CN201410252818.2A CN201410252818A CN105221120A CN 105221120 A CN105221120 A CN 105221120A CN 201410252818 A CN201410252818 A CN 201410252818A CN 105221120 A CN105221120 A CN 105221120A
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- China
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- channel unit
- fluid passage
- oil well
- metering device
- ramp metering
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Abstract
Oil well ramp metering device of the present invention comprises body, fluid passage, and outlet opening.Fluid passage comprises at least two unhurried current channel units and at least two fluidic channel unit, wherein, the fluidic channel unit circulation road unit that eases up is arranged alternately along the bearing of trend of fluid passage, and the circulation area of fluidic channel unit is less than the circulation area of unhurried current channel unit.When the kinetic transformation of oil is pressure energy, energy loss is less.And the kinetic transformation of water is when being pressure energy, energy loss is more.Therefore, the control outlet capacity of this oil well ramp metering device can effectively be improved.
Description
Technical field
The present invention relates to a kind of oil well ramp metering device.
Background technology
Usually the inflow velocity being controlled formation fluid by oil well ramp metering device is needed, to meet need of production in oil extraction system.Applying more oil well ramp metering device in prior art is helical duct type ramp metering device, nozzle type ramp metering device and mixed type ramp metering device.Such as, helical duct type ramp metering device flows through pre-designed helical duct or bending channel by making formation fluid, under frictional resistance effect, produce parasitic pressure drop, thus controls the flow velocity of formation fluid.But, when the control ability of above-mentioned oil well ramp metering device to water is stronger, also comparatively strong to the control ability of oil, cause its control water effect poor.
Therefore, how solving the problem that the control water effect of oil well ramp metering device is poor, is those skilled in the art's technical issues that need to address.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of oil well ramp metering device, effectively can improve the control ability of the water in formation fluid.
Oil well ramp metering device of the present invention comprises body, be arranged on fluid passage outside described body, and the outlet opening that described fluid passage is communicated with the inner space of described body.Described fluid passage comprises at least two unhurried current channel units and at least two fluidic channel unit, wherein, described fluidic channel unit and described unhurried current channel unit are arranged alternately along the bearing of trend of described fluid passage, and the circulation area of described fluidic channel unit is less than the circulation area of described unhurried current channel unit.
In one embodiment, the water in formation fluid forms turbulent jet in described fluid passage and oil forms laminar jet.
In one embodiment, be circumferentially with multiple fluid passage along described body, and each described fluid passage extends along the axis of described body.
In one embodiment, described body is arranged with the pipe box for making formation fluid flow into from the import of described fluid passage.
In one embodiment, the shape of cross section of each fluidic channel unit is circular, and cross-sectional diameter is 2mm-4mm.
In one embodiment, the length of unhurried current channel unit is 9-12 times of the aperture of fluidic channel unit.
In one embodiment, the width of each unhurried current channel unit is 15mm-35mm.
In one embodiment, described outlet opening is run through described body and diameter is the through hole of 8mm-10mm, and is positioned at the outlet side of fluid passage.
In one embodiment, unhurried current channel unit is set in the import department of each described fluid passage, fluidic channel unit is set in exit.
In one embodiment, the Fluid Volume in incoming fluid passage is 85L/h-1600L/h.
In one embodiment, the viscosity of the oil stream in incoming fluid passage is 10cp-500cp.
In one embodiment, Reynolds number when water flows in fluidic channel unit is greater than 2000 and is less than 18000, and Reynolds number when oil flows in fluidic channel unit is greater than 200 and is less than 2000.
In one embodiment, described pipe box comprises two collar portion be connected to each other, and wherein the free end of two collar portion is all bonded on the external surface of described body.
Relative to prior art, oil well ramp metering device of the present invention comprises body.Be provided with fluid passage in the outside of body, body is provided with the outlet opening for making fluid passage be communicated with the inner space of body.Wherein, fluid passage comprises at least two unhurried current channel units and at least two fluidic channel unit.Unhurried current channel unit and fluidic channel unit are arranged along the bearing of trend interval of fluid passage.And the circulation area of fluidic channel unit is less than the fluid area of unhurried current channel unit.Like this, when formation fluid flows into unhurried current channel unit from fluidic channel unit, the kinetic energy of formation fluid can be converted to pressure energy.When the kinetic transformation of oil is pressure energy, energy loss is less.And the kinetic transformation of water is when being pressure energy, energy loss is more.Therefore, when formation fluid flows in fluid passage, fluid passage is strong to the control ability of the control ability comparison oil of water, thus effectively can improve the control outlet capacity of this oil well ramp metering device.
Accompanying drawing explanation
Also will be described in more detail the present invention with reference to accompanying drawing based on embodiment hereinafter.In the drawings:
Fig. 1 is the structural representation of oil well ramp metering device of the present invention;
Fig. 2 is the front view of oil well ramp metering device of the present invention;
Fig. 3 is the explosive view of oil well ramp metering device of the present invention.
In the accompanying drawings, identical parts use identical Reference numeral.Accompanying drawing is not according to the scaling of reality.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Oil well ramp metering device provided by the invention comprises body 1.Fluid passage 2 is had in the arranged outside of body 1.As depicted in figs. 1 and 2, in one embodiment, this fluid passage 2 comprises the fluidic channel unit 22 that at least two unhurried current channel units 21 and at least two circulation areas are at least less than the circulation area of more than the 9 times channel units 21 that flow slowly.And fluidic channel unit 22 eases up, circulation road unit 21 is arranged alternately along the bearing of trend of fluid passage 2.
Local laminar fluid flow, through fluidic channel unit 22, when formation fluid major part is water, forms turbulent jet, and when formation fluid is mainly oil, forms laminar jet.According to the size entering the flow that will control, the circumference 360 ° along body 1 can lay 1-6 fluid passage 2, and the flow controlled is larger, and required fluid passage is more.In one embodiment, the Fluid Volume of each hour incoming fluid passage is 85L-1600L.Like this, water effectively can be made in fluidic channel unit 22 to form turbulent jet, and make oil in fluidic channel unit 22, form laminar jet, thus the control ability to water can be improved further.
When water flows into unhurried current channel unit 21 from fluidic channel unit 22, due to turbulence pulsation, the fluid being positioned at unhurried current channel unit 21 can be carried secretly by the water flowed out from fluidic channel unit 22, thus the jet width of water is expanded, and then make the part kinetic energy of water be converted into pressure energy very soon in shorter scope, and with larger capacity loss.When water postpone circulation road unit 21 flow into fluidic channel unit 22 time, the pressure energy of water is converted into kinetic energy.Therefore, when water flows in fluid passage 2, can through the conversion repeatedly between kinetic energy and pressure energy, and along with larger energy loss.Like this, the resistance to water can effectively be improved.
When oil flows into unhurried current channel unit 21 from fluidic channel unit 22, due to laminar jet, the jet width of oil can't be expanded rapidly, but keeps certain speed and width to continue flow forward, thus makes the kinetic energy of oil lose less energy in the process changing into pressure energy.When oil postpone circulation road unit 21 flow into fluidic channel unit 22 time, still there is larger speed in oil, thus pressure energy is changed in the process of kinetic energy lose less energy.Therefore, oil fluid passage 2 in during flowing, although can through the conversion repeatedly between kinetic energy and pressure energy, the energy lost when transforming between kinetic energy and pressure energy is less.Like this, the resistance to oil can effectively be reduced.
In addition, in order to make water and oil go out from jet in fluidic channel unit 22 better, when fluidic channel unit 22 is set, make the shape of cross section of fluidic channel unit 22 for circular.Namely perpendicular with the flow direction of formation fluid cross sectional shape is circular.
Further, according to the output condition of domestic oil well, the pore size of fluidic channel unit 22 can be set to as 2mm-4mm, and to ensure that water can form turbulent jet after by fluidic channel unit 22, and oil forms laminar jet after by fluidic channel unit 22.Reynolds number when water flows in fluidic channel unit 22 is greater than 2000 and is less than 18000, to form turbulent jet better.And the Reynolds number of oil when flowing in fluidic channel unit 22 is greater than 200 and is less than 2000, to form laminar jet better.In one embodiment, the flow regime entering the fluid of fluid passage can be analyzed as follows:
In hydrodynamics, using Reynolds number as differentiating the foundation of pattern of flow, the fluidised form of fluid is divided into laminar flow and turbulent flow two kinds, by laminar flow to the critical Reynolds number Re of Transitional And Turbulent Flow about 2000.The design formulas of Reynolds number:
Re＝ρvd/μ，
Wherein, ρ is the density by fluid, and v is the movement velocity by fluid, and μ is the dynamic viscosity by fluid, and d is the equivalent diameter of the passage by fluid.
Utilize above formula, can computational analysis go out, when the viscosity of fluid is between 10cp-500cp, enter the fluid flow of single fluid passage 2 at 2 ~ 40m
3time between/d, just can ensure that the oil stream entering fluid passage 2 is laminar flow, and current are turbulent flow.The horizontal well yield of oil field at home single port is about 10 ~ 50m
3between/d, oil viscosity is mostly between 10cp-500cp.Therefore, the production fluid situation of oil field at home can ensure that the oily stream entering oil well ramp metering device is laminar flow substantially, and current are turbulent flow.When oily well yield is excessive, can adopts down multiple oil well ramp metering device, reduce the fluid flow entering single fluid passage 2, laminar flow when reaching oily, cross the object of turbulent flow during water.
In one embodiment, the concrete size in the aperture of fluidic channel unit 22 can calculate according to following formula:
In order to make water keep turbulent flow in fluidic channel unit 22, then the reynolds number Re of water should be greater than 2000.That is,
Re＝4ρ
wQ/(πdμ
w)＞2000；
In order to make oil keep laminar flow in fluidic channel unit 22, then the reynolds number Re of oil should be less than 2000.That is,
Re＝4ρ
oQ/(πdμ
o)＜2000；
Thus show that the aperture of fluidic channel unit 22 should be,
ρ
oQ/(500πμ
o)＜d＜ρ
wQ/(500πμ
w)。
Wherein, ρ
wfor the density of water, Q is the flow in the unit interval of formation fluid, and d is the aperture of fluidic channel unit 22, μ
wfor the viscosity of water, ρ
ofor the density of oil, μ
ofor oil viscosity.
As can be seen from the above equation, the size in the aperture of fluidic channel unit 22 is that water, oil viscosity and density determine jointly by the flow of the formation fluid flowed in oil well ramp metering device.After the flow of formation fluid, viscosity and density are determined, the preferred aperture of fluidic channel unit 22 can be determined.
Preferably, the bearing of trend of fluid passage 2 is consistent with the bearing of trend of body 1, and arranges multiple fluid passage 2 along the circumference of body 1.Like this, the Fluid Volume flowing into oil well ramp metering device can be increased, effectively can also increase the control ability to water.
In one embodiment, by convexing to form fluid passage 2 in the arranged outside of body 1.Be provided with the projection that vertically multiple and circumference is crisscross arranged in the outside of body 1, form mesh shape.Each rectangular grid surrounded by projection is unhurried current channel unit 21.Projection between two the axially adjacent unhurried current channel units 21 along body 1 offers through hole, forms fluidic channel unit 22.Setting like this, structure is simple, convenient layout.Further, when fluidic channel unit 22 is set, make the bearing of trend of fluidic channel unit 22 also consistent with the axis direction of body 1, to increase the control ability to water further.
Preferably, unhurried current channel unit 21 is set in the import department of each fluid passage 2, and fluidic channel unit 22 is set in the exit of fluid passage 2.Like this, layer fluid incoming fluid passage 2 easily, and the flow velocity that can increase that formation fluid flows into the inner space of body 1, thus increase the Fluid Volume flowing into oil well ramp metering device.
In addition, if the length (size along the axis of body 1) of unhurried current channel unit 21 is long, oil can be caused to produce when jet and to disperse, thus increase the throttle resistance to oil.And the length of the channel unit 21 that flows slowly is too short, can cause that water is also not yet in effect when jet to be dispersed, just flow into next Jetstream fluid unit, thus reduce the throttle resistance to water.Therefore, the length of unhurried current channel unit 21 is made to be 15mm-25mm.That is, the length of unhurried current channel unit 21 is approximately the 9-12 in the aperture of fluidic channel unit 22 doubly.In addition, by such setting, oil well ramp metering device easy to install and use.
Further, the width (size along the circumference of body 1) of unhurried current channel unit 21 is 15mm-35mm.Like this, formation fluid circulation road unit 21 of postponing flows into fluidic channel unit 22, and can produce obvious jet when fluidic channel unit 22 flows out, thus increases the control outlet capacity of oil well ramp metering device further.
This oil well ramp metering device also comprises pipe box 3.Pipe box 3 is set in the outside of body 1, for stopping formation fluid, thus prevents formation fluid from flowing into from other positions of fluid passage 2.As shown in Figures 2 and 3, in one embodiment, pipe box 3 is divided into two collar portion.One end of one of them collar portion is provided with external screw thread, and the other end is provided with the projection protruding from its inner surface.One end of another one collar portion is provided with internal thread, and the other end is provided with the projection and sealing ring that protrude from inner surface.When being set on body 1 by collar portion, the projection of two collar portion abuts with the projection on body 1, thus is fixed on body 1 by pipe box 3.And the external surface of the sealing ring be arranged on collar portion and body 1 seals fits, overflow from the contact jaw of body 1 and pipe box 3 to prevent formation fluid.Setting like this, structure is simple, is conveniently fixed on body 1 by pipe box 3.In addition, when the projection on collar portion abuts with the projection on body 1, should ensure that formation fluid successfully can flow into outlet opening 4 from fluid passage 2.
This oil well fluid control also comprises outlet opening 4.Outlet opening 4 is for running through the through hole of body 1, and diameter is 8-10mm, and is positioned at the outlet side of fluid passage 2.After formation fluid flows out from fluid passage 2, flow into by outlet opening 4 in the inner space of body 1.In addition, also oil nozzle is provided with at outlet opening 4.In one embodiment, offer screw thread in the surrounding of outlet opening 4, also offer screw thread at the outer wall of oil nozzle, oil nozzle is spun on body 1 by screw thread.Like this, oil nozzle can be adjusted in conjunction with finishing drilling data and oil reservoir data according to the reservoir electrical measurement result before Oil Field completion, thus the convenient formation fluid amount regulated in inflow body 1.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, various improvement can be carried out to it and parts wherein can be replaced with equivalent.Especially, only otherwise there is structural hazard, the every technical characteristic mentioned in each embodiment all can combine in any way.The present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (13)
1. an oil well ramp metering device, comprises body, is arranged on fluid passage outside described body, and the outlet opening that described fluid passage is communicated with the inner space of described body;
Described fluid passage comprises at least two unhurried current channel units and at least two fluidic channel unit, wherein, described fluidic channel unit and described unhurried current channel unit are arranged alternately along the bearing of trend of described fluid passage, and the circulation area of described fluidic channel unit is less than the circulation area of described unhurried current channel unit.
2. oil well ramp metering device according to claim 1, is characterized in that, the water in formation fluid forms turbulent jet in described fluid passage and oil forms laminar jet.
3. oil well ramp metering device according to claim 1 and 2, is characterized in that, is circumferentially with multiple fluid passage along described body, and each described fluid passage extends along the axis of described body.
4. the oil well ramp metering device according to any one of claim 1-3, is characterized in that, described body is arranged with the pipe box for making formation fluid flow into from the import of described fluid passage.
5. the oil well ramp metering device according to any one of claim 1-4, is characterized in that, the shape of cross section of each fluidic channel unit is circular, and cross-sectional diameter is 2mm-4mm.
6. the oil well ramp metering device according to any one of claim 1-5, is characterized in that, the length of unhurried current channel unit is 9-12 times of the aperture of fluidic channel unit.
7. the oil well ramp metering device according to any one of claim 1-6, is characterized in that, the width of each unhurried current channel unit is 15mm-35mm.
8. the oil well ramp metering device according to any one of claim 1-7, is characterized in that, described outlet opening is run through described body and diameter is the through hole of 8mm-10mm, and is positioned at the outlet side of fluid passage.
9. the oil well ramp metering device according to any one of claim 1-8, is characterized in that, arranges unhurried current channel unit, arrange fluidic channel unit in exit in the import department of each described fluid passage.
10. the oil well ramp metering device according to any one of claim 1-9, is characterized in that, the fluid flow in incoming fluid passage is 85L/h-1600L/h.
11. oil well ramp metering devices according to any one of claim 1-10, it is characterized in that, the oil viscosity in incoming fluid passage is 10cp-500cp.
12. oil well ramp metering devices according to any one of claim 1-11, it is characterized in that, Reynolds number when water flows in fluidic channel unit is greater than 2000 and is less than 18000, and Reynolds number when oil flows in fluidic channel unit is greater than 200 and is less than 2000.
13. oil well ramp metering devices according to claim 4, it is characterized in that, described pipe box comprises two collar portion be connected to each other, and wherein the free end of two collar portion is all bonded on the external surface of described body.
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| CN201410252818.2A CN105221120B (en) | 2014-06-09 | 2014-06-09 | Oil well flows into controller |
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| CN201410252818.2A CN105221120B (en) | 2014-06-09 | 2014-06-09 | Oil well flows into controller |
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| CN105221120B CN105221120B (en) | 2018-08-21 |
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2014
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