CN105089580B - Self-adaptive controlled water installations and oil extraction system for oil extraction system - Google Patents
Self-adaptive controlled water installations and oil extraction system for oil extraction system Download PDFInfo
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- CN105089580B CN105089580B CN201410199177.9A CN201410199177A CN105089580B CN 105089580 B CN105089580 B CN 105089580B CN 201410199177 A CN201410199177 A CN 201410199177A CN 105089580 B CN105089580 B CN 105089580B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 238000000605 extraction Methods 0.000 title claims abstract description 22
- 230000037361 pathway Effects 0.000 claims abstract description 100
- 239000012530 fluid Substances 0.000 claims abstract description 75
- 230000000712 assembly Effects 0.000 claims abstract description 53
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 43
- 238000005755 formation reaction Methods 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003032 molecular docking Methods 0.000 claims description 10
- 230000002829 reduced Effects 0.000 claims description 8
- 210000002356 Skeleton Anatomy 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 241000538562 Banjos Species 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000003044 adaptive Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036961 partial Effects 0.000 description 2
- 101710006658 AAEL003512 Proteins 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 230000003111 delayed Effects 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003313 weakening Effects 0.000 description 1
Abstract
The present invention relates to the self-adaptive controlled water installations and oil extraction system for oil extraction system.The self-adaptive controlled water installations include central tube, the screen assemblies for receiving formation fluid, the control water assembly being fixedly connected with central tube, and fluid passage.Control water assembly includes throttling element, and throttling element includes throttling element body；The feed pathway of arc, at least one throttle nozzle is provided between the arrival end and the port of export of feed pathway；The intake tunnel being connected with the port of export of feed pathway；It is arranged on the outlet of the inner radial of feed pathway；Oil inlet passage, for the oil in formation fluid to be transported in outlet.The self-adaptive controlled water installations are while can have higher control water specific aim, the also function with impurity screening.
Description
Technical field
The present invention relates to a kind of self-adaptive controlled water installations for oil extraction system, a kind of oil extraction system is further related to.
Background technology
The inflow velocity by water control device control formation fluid is usually required in oil extraction system, to meet to produce need
Will.The water control device applied in the prior art is typically based on oil nozzle type water control device.But oil or current oil-feed nozzle type control water
During device, the passage that both flow through is identical, can so cause the control water specific aim of oil nozzle type water control device poor.It is meanwhile existing
Water control device in technology can only adjust the flow velocity of formation fluid so that its feature is single.
Therefore, how to solve the problems, such as water control device control water specific aim difference and feature it is single be people in the art
Member's technical issues that need to address.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of self-adaptive controlled water installations.The self-adaptive controlled water installations can have
While having higher control water specific aim, the also function with impurity screening.
The present invention the self-adaptive controlled water installations for oil extraction system, including central tube, be set in the central tube outside simultaneously
For receiving screen assemblies, the control water assembly being fixedly connected with the central tube of formation fluid, and positioned at the central tube
Outside and by the fluid passage that is connected with the central tube of control water assembly, wherein, the screen assemblies and it is described in
Formed with the gap being connected with the fluid passage between heart pipe；
The control water assembly includes throttling element, and the throttling element includes throttling element body；It is arranged on the throttling element body
On arc feed pathway, it is used to receive formation fluid, and between the arrival end and the port of export of the feed pathway
It is provided with least one throttle nozzle；The intake tunnel being connected with the port of export of the feed pathway, it is used to receive ground laminar flow
Water in body；It is arranged on the outlet of the inner radial of the feed pathway；Oil inlet passage, it is connected with the throttle nozzle
It is logical, so as to which the oil in formation fluid is transported in the outlet.
In one embodiment, the outside wall surface of the intake tunnel is the arc outer wall being made up of at least one arch section
Face, the outside wall surface of itself and feed pathway are smoothly connected.
In one embodiment, one end of the outer wall of the intake tunnel and the outer wall of the feed pathway are smoothly connected,
The other end is connected with the inner wall smooth of the feed pathway, so as to be configured to substantially into the annular chamber of circle, and the throttling
Nozzle connects with the annular chamber, and the outlet is located at the middle part of the annular chamber.
In one embodiment, the feed pathway is provided with multiple, and is evenly distributed around the circumference of the annular chamber.
In one embodiment, the width of the feed pathway is gradually reduced along arrival end to extreme direction is exported.
In one embodiment, the width of the arrival end of the feed pathway is 2mm-3mm, and the width of the port of export is
1.2mm-2.2mm。
In one embodiment, the throttle nozzle is through the opening of the inwall of the feed pathway, its bearing of trend
It is perpendicular with the inwall of the feed pathway.
In one embodiment, the inwall of the feed pathway is provided with multiple size identical throttle nozzles, throttling spray
The distance of the width of mouth and two neighboring throttle nozzle is directly proportional to the length of the feed pathway.
In one embodiment, the inwall of the feed pathway is in the feed pathway and the intersection of the throttle nozzle
Construction is pointed at.
In one embodiment, the wall thickness of the inwall of the feed pathway is gradually reduced along arrival end to extreme direction is exported,
Wherein, the wall thickness on inwall positioned at the port of export is less than 0.1mm.
In one embodiment, a diameter of 1.6mm-5mm of the outlet.
In one embodiment, the throttling element body is tabular, and the upper surface of the throttling element body is provided with and can formed
The projection of the feed pathway, the intake tunnel and the oil inlet passage.
In one embodiment, the raised height is 2mm-4mm.
In one embodiment, the throttling element, which is provided with, is used to block feed pathway, intake tunnel and oil inlet passage, from
And the upper lid for making formation fluid be flowed into from the entrance of the feed pathway.
In one embodiment, the surface roughness of the throttling element body is less than 0.0032mm, the throttling element body
Flatness between ± 0.1mm.
In one embodiment, it is 1.5mm-2mm's that a circle remote is provided with the annular chamber from the periphery of the outlet
Chamfering.
In one embodiment, the distance between outer wall of the inwall of the screen assemblies and the central tube is 3.5mm-
6mm。
In one embodiment, the central tube is provided with more piece, and the screen assemblies on different section central tubes pass through the
A connection piece connects, and the gap between first connector and the central tube forms a part for the fluid passage.
In one embodiment, the first connector includes docking box cupling with the screen assemblies clamping on a section central tube,
And box cupling and another short circuit of checking card for saving the screen assemblies clamping on central tube are docked with described, wherein the short circuit of checking card
Both ends are on same section central tube, and on the inside of the short circuit of checking card and the end margin away from screen assemblies is provided with projection,
The raised circumferential intermittent along the short circuit of checking card is set, and is abutted with central tube.
In one embodiment, often save on central tube and be provided with multiple screen assemblies, two neighboring screening group vertically
Part is fixedly connected by the second connector, wherein the gap between second connector and the central tube forms the fluid
A part for passage.
In one embodiment, the control water assembly also includes overcoat and base tube, wherein, the overcoat connects by the 3rd
Fitting is connected with the screen assemblies, and the base tube is connected with the central tube, and the throttling element is located at the overcoat and described
Between base tube, the upper lid fits with the overcoat, wherein the gap structure between the 3rd connector and the central tube
Into a part for the fluid passage.
In one embodiment, the second connector and/or the 3rd connector include pipe sleeve, wherein, the both ends of the pipe sleeve
Edge is equipped with sealing ring, and sealing ring protrudes from inner surface or the outer surface of the pipe sleeve.
In one embodiment, the screen assemblies include being set in the wrapping wire skeleton of the central tube, be set in it is described
Wrapping wire on wrapping wire skeleton, the screen packs being set in outside the wrapping wire, and the sieve being set in outside the screen packs
Net oversheath.
The oil extraction system of the present invention, including the flow string that is located at by packer in well and it is located at the flow string
Interior self-adaptive controlled water installations, it is characterised in that the self-adaptive controlled water installations are self-adaptive controlled any one of above-mentioned
Water installations.
Relative to prior art, the self-adaptive controlled water installations for oil extraction system of the invention include central tube, screening group
Part, control water assembly and fluid passage.Screen assemblies are set in the outside of central tube, for receiving formation fluid, and with
Formed with the gap being connected with fluid passage between heart pipe.Control water assembly is fixedly connected with central tube, for controlling ground laminar flow
The flow velocity of body.The outside of the centrally disposed pipe of passage, and connected by controlling water assembly with central tube.Formation fluid flows into central tube
When, it is necessary to successively by screen assemblies and control water assembly.Therefore, the self-adaptive controlled water installations have impurity screening and regulation fluid
The function of flow velocity.
Control water assembly includes throttling element.Throttling element includes throttling element body, feed pathway, oil inlet passage, intake tunnel, section
Flow nozzle and outlet.Feed pathway is shaped as arc, is arranged on throttling element body, and for receiving formation fluid.Enter
Aquaporin is connected with the port of export of feed pathway, for receiving the water in formation fluid.Outlet is arranged on the footpath of feed pathway
Internally.Throttle nozzle is located between the arrival end of feed pathway and the port of export.Oil inlet passage is led to by throttle nozzle and feed liquor
Road connects, and is connected with outlet, so as to which the oil in formation fluid is transported into outlet.Due to water it is sticky it is small, density is big,
And the viscosity of oil is big, density is small, therefore the inertia of water is big, and the inertia of oil is small.When formation fluid flows in feed pathway,
The outer wall of feed pathway is larger to the resistance of oil, smaller to the resistance of water.So, oil can flow into oil-feed by throttle nozzle and lead to
Road, and water can flow into intake tunnel along feed pathway, so that oil, water can be flowed out by different passages, Jin Erfang
Just it is controlled individually for water.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.In figure：
Fig. 1 is the structural representation of the control water assembly in the present invention；
Fig. 2 is the structural representation of the self-adaptive controlled water installations of the present invention；
Fig. 3 is the partial schematic diagram in A portions in Fig. 1；
Fig. 4 is the partial schematic diagram in B portions in Fig. 2；
Fig. 5 is the structural representation of the oil extraction system of the present invention.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not according to the scaling of reality.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in figures 1 and 3, the self-adaptive controlled water installations provided by the present invention for oil extraction system include control water assembly 6.
Wherein control water assembly 6 includes throttling element 62.Throttling element 62 includes throttling element body 621 and is separately positioned on throttling element body 621
On feed pathway 622, intake tunnel, oil inlet passage, throttle nozzle 625 and outlet 624.Wherein, the arrow in figure represents
The flow direction of formation fluid.
In one embodiment, throttling element body 621 includes substrate and is located at the projection of surface.Substrate can be
Arc, or flat board.It is preferential from being flat board herein, to facilitate processing.Projection is set to form feed liquor on substrate
Passage, oil inlet passage and intake tunnel.It is time saving and energy saving by being processed in this way, can facilitate.
Because the height of projection is the height of feed pathway, intake tunnel and oil inlet passage.Therefore, raised height is got over
Height, the formation fluid passed through are also more.However, raised excessive height, can cause throttling element 62 to oil, the shunting effect of water
It is poor.The throttling action of oil, water can also be decreased simultaneously.If by projection set it is too low, throttling element 62 itself it is bright and clean
Degree can have an impact to its steady oil control water function.And feed pathway or the surface roughness of oil inlet passage or intake tunnel can be right
The shunting of formation fluid and difference current limitation effect have obvious weakening effect in throttling element 62.Therefore, according to current domestic oil well
Output condition and throttling element 62 machining accuracy, raised high-priority is chosen to be 2mm-4mm.
In addition, during processing and manufacturing throttling element body 621, the surface roughness of throttling element body 621 is set to be less than 0.0032mm,
The flatness of throttling element body 621 is between ± 0.1mm.So, shunting of the throttling element 62 to oil, water can further be improved
Effect.
The shape of feed pathway 622 is set to arc.When formation fluid flows in feed pathway 622, feed pathway 622
It is larger to the resistance of oil, and it is smaller to the resistance of water.So, oil can flow into oil inlet passage by throttle nozzle 625, and water can edge
Feed pathway 622 and flow into intake tunnel, flowed out so that oil, water are flowed from feed pathway 622 by different paths respectively.
Because oil, water can be flowed out by different approach from throttling element 62, therefore the self-adaptive controlled water installations can be improved to oil
Or the control specific aim of water, so as to improve control water efficiency.
In addition, the width of feed pathway 622 is gradually reduced along arrival end to extreme direction is exported.It is arranged such, there is increase
The effect of on-way resistance, it is possible to reduce the influx of highly viscous fluid.Furthermore it is also possible to increase the current difference of oil and water, so as to enter
One step improves oil, the shunting effect of water.
In a specific embodiment, the width of the arrival end of feed pathway 622 is 2mm-3mm.So, can be to entering
The formation fluid of throttling element 62 carries out first time acceleration, higher so as to promote the formation fluid entered in feed pathway 622 to have
Flow velocity, consequently facilitating oil, moisture stream.Further, it is also possible to there is throttling action.
The width of the port of export of feed pathway 622 is set to 1.2mm-2.2mm.So, it both ensure that feed pathway 622 could
Producing enough on-way resistances forces oil to be flowed out out of throttle nozzle 625, in turn ensure that and less local deformation resistance is produced to water
Power, water is promoted smoothly to be flowed out from the exit of feed pathway 622.In addition, the port of export plays the role of second throttle to water, so as to
To cause the water from port of export outflow to pass through secondary acceleration, and then the convenient throttle resistance provided to water.
In addition, the specific size of the entrance of feed pathway 622 and the specific size of outlet can have according in Oil Field
Body application well yield and specific adjust flow control water segmentation well completion to determine.When the Liquid output of application well is relatively large,
The entrance opening dimension and outlet size of feed pathway 622 accordingly increase.When the Liquid output of application well is relatively small, feed pathway
622 entrance opening dimension and outlet size accordingly reduces.
Also, the wall thickness of the inwall 626 of feed pathway 622 is gradually reduced along arrival end to extreme direction is exported, and inwall is upper
It is less than 0.1mm in the wall thickness of the port of export.That is, inwall forms wedge angle in the position of the port of export of feed pathway 622.So, stream is worked as
When the formation fluid entered in feed pathway 622 is mainly water, wedge angle can be such that water is formed in throttle nozzle 625 compared with maelstrom, from
And hinder water to enter throttle nozzle 625, and then water is entered intake tunnel along feed pathway 622.And when in feed pathway 622
Formation fluid when being mainly oily, oily viscosity is higher, and the presence of wedge angle will not have an impact to the flowing of oil.
In one embodiment, throttle nozzle 625 is the opening on the inwall 626 of feed pathway 622, and is throttled
The bearing of trend of nozzle 625 and the inwall 626 of feed pathway 622 are perpendicular.So, oil can be promoted in the form of line-like
Flowed out from throttle nozzle 625.
Also, multiple size identical throttle nozzles 625 are provided with the inwall 626 of feed pathway 622.So, ensure
The throttle resistance of each throttle nozzle 625 is identical, so that each throttle nozzle 625 is basically identical to the shunting action of oil, from
And be advantageous to shunting of the throttling element 62 to oil.In addition, the width of throttle nozzle 625 and two neighboring throttle nozzle 625 away from
It is directly proportional to the length of the feed pathway 622 from equal, further to improve separation capacity of the throttling element 62 to oil.
Further, the inwall of feed pathway 622 forms wedge angle in the intersection of feed pathway 622 and throttle nozzle 625.
That is, the shape of the inwall between two neighboring throttle nozzle of feed pathway substantially in echelon, and is located at feed pathway
The side of side is trapezoidal long side.So, when it is mainly water to flow into the formation fluid in feed pathway 622, wedge angle can enter one
Step makes water be formed in throttle nozzle 625 compared with maelstrom, so as to hinder water to enter throttle nozzle 625, and then makes water along feed liquor
Passage 622 enters intake tunnel.And when the formation fluid in feed pathway 622 is mainly oily, oily viscosity is higher, wedge angle
In the presence of will not to oil flowing have an impact.Certainly, because the error of processing and manufacturing, the inwall of feed pathway 622 lead in feed liquor
The intersection of road 622 and throttle nozzle 625 may not definitely be wedge angle.
Oil inlet passage is connected by the throttle nozzle 625 being arranged in feed pathway 622 with feed pathway 622, with convenient
Oil flows into oil inlet passage from throttle nozzle 625.And oil inlet passage connects with outlet 624, when oil stream enters feed pathway 622
Afterwards, then from outlet 624 flow out.
Intake tunnel and the outlet of feed pathway 622, so that water can flow into intake tunnel from feed pathway 622.
In one embodiment, the outside wall surface of intake tunnel is the arc outer wall face that is made up of at least one arch section, itself and feed liquor
The outside wall surface of passage 622 is smoothly connected.Wherein, the outside wall surface of intake tunnel refer to water flow into intake tunnel when, directly with water inlet
The face of the wall contacts of passage.When the outside wall surface of feed pathway 622 refers to that formation fluid flows into feed pathway 622, directly with entering
The face of the wall contacts of liquid passage 622.It is arranged such, the path that can be flowed through water is elongated, and can make the throttling of water
Pressure difference is substantially improved, so as to which further outlet capacity is controlled in lifting.
In one embodiment, throttling element body 621 is provided with multiple feed pathways 622.The one of the outer wall of intake tunnel
The outer wall with feed pathway 622 is held to be smoothly connected, the other end and the inwall 626 of another feed pathway 622 are smoothly connected.So as to
Form substantially into the annular chamber 623 of circle., can be along the outer of intake tunnel after water flows into annular chamber 623 from feed pathway 622
Wall and the inwall of feed pathway 622 626 flow.It is arranged such, it is simple in construction, while water can also be promoted in annular chamber 623
High speed rotational flow, water is forced to flow out throttling element 62 after substantial amounts of rotation.Feed pathway 622 is provided with multiple, and edge
The circumference of annular chamber 623 is uniformly distributed.By in this way, the Fluid Volume into throttling element 62 can be increased.
When fluid when containing Chuck Steak in stratum, mostly layer fluid all can enter annular chamber by throttle nozzle 625
623, only partially layer fluid enters annular chamber 623 by feed pathway 622.But now flowed out from throttle nozzle 625
Formation fluid can't flow along annular chamber 623, but directly flow into outlet 624, therefore formation fluid along shortest path
The pressure loss is less.When formation fluid water content increases, reduced by the formation fluid of throttle nozzle 625.Now from feed liquor
The formation fluid of the outlet outflow of passage 622 can flow out from outlet 624 again along after the rotational flow of annular chamber 623.Also, contain
Water is more, and formation fluid is more in the rotating cycle of annular chamber 623, so that the path that formation fluid flows through is longer, and then ground
The pressure loss of layer fluid can be bigger.Therefore, when formation fluid oil-containing is how aqueous few, throttling element 62 to the resistance of formation fluid compared with
It is small.And the fluid on stratum it is aqueous more when, throttling element 62 can also increase the resistance of formation fluid therewith.
After flowing into annular chamber 623 due to oil or water, the middle part of annular chamber 623 can be moved closer in rotary course.Therefore,
Outlet 624 is arranged on the medium position of annular chamber 623.In one embodiment, a diameter of 1.6mm- of outlet 624
5mm, so that throttling action can be played.The specific size of outlet 624 can be smaller in the production section use for needing to be throttled
Outlet diameter, and use larger outlet diameter in the production section for being not required to be throttled.Furthermore it is possible to it is provided with annular chamber
One circle remote is from the chamfering that the periphery of outlet is 1.5mm-2mm.I.e. from the length for being 1.5mm-2mm apart from the periphery of outlet 624
Degree starts, and closer to outlet 624, the thickness of substrate is thinner.So, be advantageous to reduce throttle resistance of the throttling element 62 to oil.
As shown in Fig. 2 in one embodiment, control water assembly 6 also includes overcoat 61 and base tube 63.One end of overcoat 61
It is tightly connected by fixture and base tube 63, one end is tightly connected by the 3rd connector 5 with screen assemblies 2.3rd connector 5
The outside of central tube 1 is set in, and gap is left between central tube 1, so as to form a part for fluid passage.Base tube 63 with
Central tube 1 is connected through a screw thread, with easy disassembly.Throttling element 62 is welded on base tube 63 between central tube 1 and base tube 63
On.After formation fluid flows through throttling element 62, then by the eyelet inflow central tube 1 on base tube 63.It is arranged such, structure letter
It is single, it is convenient that control water assembly 6 is installed on central tube 1.On 3rd connector 5 support abutted with central tube 1 can be set convex
Rise, to support screen assemblies 2 and connector.
In addition, it is additionally provided with throttling element 62 for blocking feed pathway, intake tunnel and oil inlet passage, so that stratum
The upper lid that fluid flows into from the entrance of the feed pathway 622.One face of upper lid and the projection of feed pathway 622 fit,
Another side fits with overcoat 61.So, formation fluid can be made only to be flowed into from the entrance of feed pathway 622, prevent ground laminar flow
Body flows into from other positions.The thickness of substrate and upper lid can select 4mm-6mm.So, upper lid is welded on throttling element sheet
When on body 621, the deformation of upper lid and throttling element body 621 can be reduced.
The self-adaptive controlled water installations of the present invention also include central tube 1.The length and quantity of central tube 1 can be wanted according to using
Ask specific setting.In a specific embodiment, the length for often saving central tube 1 is 10m-12m.It is so convenient to transport central tube
To erecting bed.
Also include screen assemblies 2 in the self-adaptive controlled water installations.Screen assemblies 2 are set in the outside of central tube 1, are used for
Impurity is filtered, so as to reduce impurity to central tube 1 or the erosion attack of other devices., can be with addition, after being provided with screen assemblies 2
Impurity screening while rate of flow of fluid is controlled, so as to add the function of self-adaptive controlled water installations.
As shown in figure 4, the concrete structure of screen assemblies 2 can be：Wrapping wire skeleton 24, set including being set in central tube 1
The wrapping wire 23 being located on wrapping wire skeleton 24, the screen packs 22 being set in outside wrapping wire 23, and it is set in screen packs 22
Outer screen cloth oversheath 21.It is arranged such, the intensity of screen assemblies 2 can be improved, and then improves the use longevity of screen assemblies 2
Life.
In a preferred embodiment, the distance between the inwall of screen assemblies 2 and the outer wall of central tube 1 are 3.5mm-
6mm.So, it is possible to reduce because the spacing between screen assemblies 2 and central tube 1 is excessive, cause screen assemblies 2 easily to bend.Together
When, it can also reduce because gap is too small, cause the flow resistance of formation fluid larger.
As shown in figure 5, it is adaptive specifically to introduce this exemplified by the self-adaptive controlled water installations are applied in oil extraction system below
Answer use and the installation process of water control device.Flow string 9 is provided with oil extraction system.Flow string 9 is set in by multiple
Packer 10 on the outside of it is fixed on the borehole wall 8 of oil extraction system.Self-adaptive controlled water installations are fixedly installed on flow string 9
Afterwards, in addition to can be with impurity screening, stratum gravel can also be stopped, so as to reduce stratum gravel centering heart pipe 1 or other devices
Erosion attack.Furthermore it is also possible to improve each section in well of production liquid uniformity, while the coning of bottom water can also be delayed, but also
The service life of oil extraction system can be extended, improve its recovery ratio.
Apply the control water assembly 6 in oil extraction system can be according to different operations and reservoir conditions, specifically from its institute
Rise block water and oil resistance function.The material of throttling element 62 in control water assembly 6 can select corrosion-resistant material, to improve its corrosion resistant
Corrosion.
In one embodiment, at least one self-adaptive controlled water installations are set between two adjacent packers 10.Ability
Field technique personnel easily choose the quantity of adaptive water control device according to the Restriction Parameters of reservoir characteristics and control water assembly 6.By
, it is necessary to be exerted a force construction by central tube 1 when self-adaptive controlled water installations are installed in oil extraction system, thus it is each self-adaptive controlled
Water installations only set a control water assembly 6, positioned at one end of central tube 1.
Because eve of the control water assembly 6 only in well is entered could be connected with central tube 1.Therefore, at one preferably
In ground embodiment, the 3rd connector 5 and screen assemblies 2 and the clamping of overcoat 61, in-site installation or replacing are carried out to facilitate.At one
In embodiment, the 3rd connector 5 includes pipe sleeve and two sealing rings.On inwall in pipe sleeve and the position close to edges at two ends
It is respectively equipped with an annular groove.Sealing ring is arranged in annular groove, and protrudes from the inner surface of pipe sleeve.The He of screen assemblies 2
The outer surface of overcoat 61 is provided with projection.3rd connection 5 connects screen assemblies 2 and overcoat 61 by raised and sealing ring.Certainly,
Annular groove can also be arranged on the outer wall of pipe sleeve, etc..
The length of central tube 1 is set to 10m-12m, in addition to convenience in transport, also conveniently attached it in well.Due to phase
Length between adjacent two packers 10 is longer, therefore is preferentially provided with more piece central tube 1 from each self-adaptive controlled water installations.This
Sample, the quantity of inlet can be increased, and then increase the Fluid Volume of incoming fluid passage.Two adjacent section central tubes 1 can lead to
Cross screwed pipe connection.Screen assemblies 2 on different section central tubes 1 are connected by the first connector 4, and the first connector
The part that gap forms fluid passage is provided between 4 and central tube 1.It can set on first connector 4 and be abutted with central tube 1
Support protrusion, to support connector and screen assemblies 2.
In one embodiment, the first connector 4 includes banjo fixing butt jointing 41, docking box cupling 42 and short circuit 43 of checking card.Docking
One end of joint 41 and the clamping of screen assemblies 2, one end is with docking the clamping of box cupling 42.Check card one end and another screen cloth of short circuit 43
The clamping of component 2, one end is with docking the clamping of box cupling 42.Banjo fixing butt jointing 41, docking box cupling 42 and short circuit 43 of checking card are set in center
The outside of pipe 1, with 1 part for leaving gap and forming fluid passage of central tube.And short circuit 43 of checking card is set in same section
On central tube 1, its inner side is provided with the projection of circumferentially distributed interruption, and projection abuts with central tube 1.And the projection is positioned at remote
From an end margin of screen assemblies 2, in order to by the construction and installation of short circuit 43 of checking card.In a preferred embodiment, will check card
After short circuit 43 is connected to screen assemblies 2, the free end for short circuit 43 of checking card is concordant with the end of central tube 1, next in order to install
Save central tube 1.
Certainly, the first connector 4 can also include docking box cupling and short circuit of checking card.Check card short circuit one end and screen assemblies
2 clampings, the other end is with docking box cupling clamping.Docking box cupling is connected on the screen assemblies 2 of another section central tube 1.
When self-adaptive controlled water installations are installed in well, first first segment central tube 1 is put into well, and makes first segment center
One end that pipe 1 is provided with short circuit of checking card is located at well head upward.Then short circuit of checking card is clamped by well head tong, by the second section
Heart pipe 1 is connected with first segment central tube 1.After the completion of to be connected, first segment and the second section central tube 1 system are entered in well, and makes
One end that second section central tube 1 is provided with short circuit of checking card is located at well head, is connected with Section of three central tube 1.So repeat, until
By all central tubes 1 connect and be in well untill.Control water assembly 6 be located on first segment central tube 1, and be located remotely from check card it is short
The one end connect.
In addition, the central tube 1 of two neighboring self-adaptive controlled water installations can use same screen cloth joint to connect.Now,
One control water assembly 6 is located on first segment central tube 1, and another control water assembly 6 is located on final section central tube 1.
Because the length of every section central tube 1 is 10m-12m.Therefore can be axially disposed multiple on every section central tube 1
Screen assemblies 2.So, the quantity of inlet can be increased, and then increase the Fluid Volume in incoming fluid passage.Adjacent two
Screen assemblies 2 are fixedly connected by the second connector 3.Gap is provided between second connector 3 and central tube 1, so as to form stream
A part for body passage.During due to screen assemblies 2 are assembled on central tube 1, it is not required to dismount etc. again.Therefore, preferential choosing
It is welded on screen assemblies 2 on the second connector 3, to increase degree of being connected firmly.
In one embodiment, the second connector 3 includes pipe sleeve and two sealing rings.Set respectively in the edges at two ends of pipe sleeve
There is an annular groove.Sealing ring is arranged in annular groove, and protrudes from the inner surface of pipe sleeve.Two neighboring screen assemblies 2
It is set in pipe sleeve, and crush seal circle, to realize sealing.The end of pipe sleeve welds together with screen assemblies 2.
The free end of central tube 1, that is, refer to the one end not being connected with central tube 1 and control water assembly 6, screen casing can be passed through
Joint 7 is fixed on flow string 9, to prevent central tube 1 from being moved in flow string 9.One end of fluid passage and control water group
Part 6 is connected, and the other end is fixed on central tube 1 by fixture sealing.In one embodiment, an end of screen assemblies 2
Portion is the end of fluid passage, and fixture is arranged on the end of screen assemblies 2.Fixture can select those skilled in the art
Known fixture, such as retainer ring and gasket ring.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as being rushed in the absence of structure
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (24)
1. a kind of self-adaptive controlled water installations for oil extraction system, including central tube, it is set in outside the central tube and for connecing
Screen assemblies by formation fluid, the control water assembly being fixedly connected with the central tube, and on the outside of the central tube simultaneously
By the fluid passage that is connected with the central tube of control water assembly, wherein, the screen assemblies and the central tube it
Between formed with the gap being connected with the fluid passage；
The control water assembly includes throttling element, and the throttling element includes：
Throttling element body；
The feed pathway for the arc being arranged on the throttling element body, it is used to receive formation fluid, and in the feed liquor
At least one throttle nozzle is provided between the arrival end and the port of export of passage；
The intake tunnel being connected with the port of export of the feed pathway, it is used to receive the water in formation fluid；
It is arranged on the outlet of the inner radial of the feed pathway；
Oil inlet passage, it is connected with the throttle nozzle, so as to which the oil in formation fluid is transported in the outlet.
2. self-adaptive controlled water installations according to claim 1, it is characterised in that the outside wall surface of the intake tunnel is by extremely
The arc outer wall face that a few arch section is formed, the outside wall surface of itself and feed pathway are smoothly connected.
3. self-adaptive controlled water installations according to claim 1 or 2, it is characterised in that the one of the outer wall of the intake tunnel
The outer wall with the feed pathway is held to be smoothly connected, the other end is connected with the inner wall smooth of the feed pathway, so as to be configured to
Substantially into the annular chamber of circle, and the throttle nozzle connects with the annular chamber, and the outlet is located at the annular chamber
Middle part.
4. self-adaptive controlled water installations according to claim 3, it is characterised in that the feed pathway is provided with multiple, and encloses
Circumference around the annular chamber is evenly distributed.
5. self-adaptive controlled water installations according to claim 1, it is characterised in that the width of the feed pathway is along arrival end
It is gradually reduced to outlet extreme direction.
6. self-adaptive controlled water installations according to claim 1, it is characterised in that the width of the arrival end of the feed pathway
For 2mm-3mm, and the width of the port of export is 1.2mm-2.2mm.
7. self-adaptive controlled water installations according to claim 3, it is characterised in that the throttle nozzle is through the feed liquor
The opening of the inwall of passage, and bearing of trend and the inwall of the feed pathway are perpendicular.
8. self-adaptive controlled water installations according to claim 3, it is characterised in that the inwall of the feed pathway is provided with more
The distance of individual size identical throttle nozzle, the width of throttle nozzle and two neighboring throttle nozzle with the feed pathway
Length it is directly proportional.
9. self-adaptive controlled water installations according to claim 8, it is characterised in that the inwall of the feed pathway it is described enter
The intersection of liquid passage and throttle nozzle construction is pointed at.
10. self-adaptive controlled water installations according to claim 3, it is characterised in that the wall thickness of the inwall of the feed pathway
It is gradually reduced along arrival end to extreme direction is exported, wherein, the wall thickness positioned at the port of export is less than 0.1mm.
11. self-adaptive controlled water installations according to claim 1, it is characterised in that a diameter of 1.6mm- of the outlet
5mm。
12. self-adaptive controlled water installations according to claim 1, it is characterised in that the throttling element body is tabular, described
The upper surface of throttling element body is convex provided with can form the feed pathway, the intake tunnel and the oil inlet passage first
Rise.
13. self-adaptive controlled water installations according to claim 12, it is characterised in that the described first raised height is 2mm-
4mm。
14. self-adaptive controlled water installations according to claim 1, it is characterised in that the throttling element, which is provided with, to be used to block
Feed pathway, intake tunnel and oil inlet passage, so that the upper lid that formation fluid flows into from the entrance of the feed pathway.
15. self-adaptive controlled water installations according to claim 1, it is characterised in that the rough surface of the throttling element body
Degree is less than 0.0032mm, and the flatness of the throttling element body is between ± 0.1mm.
16. self-adaptive controlled water installations according to claim 3, it is characterised in that be provided with the annular chamber circle remote from
The periphery of the outlet is 1.5mm-2mm chamfering.
17. self-adaptive controlled water installations according to claim 1, it is characterised in that the inwall of the screen assemblies with it is described
The distance between outer wall of central tube is 3.5mm-6mm.
18. the self-adaptive controlled water installations according in claim 1, it is characterised in that the central tube is provided with more piece, is located at
Difference section central tubes on screen assemblies connected by the first connector, between first connector and the central tube between
Gap forms a part for the fluid passage.
19. self-adaptive controlled water installations according to claim 18, it is characterised in that first connector includes and a section
The docking box cupling of screen assemblies clamping on central tube, and dock box cupling and another screen assemblies saved on central tube with described
The short circuit of checking card of clamping, wherein the both ends of the short circuit of checking card are saved on central tube positioned at same, on the inside of the short circuit of checking card
And the end margin away from screen assemblies is provided with the second projection, second projection is set along the circumferential intermittent of the short circuit of checking card
Put, and abutted with central tube.
20. self-adaptive controlled water installations according to claim 14, it is characterised in that often save on central tube vertically provided with more
The individual screen assemblies, two neighboring screen assemblies are fixedly connected by the second connector, wherein second connector and institute
State the part that the gap between central tube forms the fluid passage.
21. self-adaptive controlled water installations according to claim 20, it is characterised in that it is described control water assembly also include overcoat with
And base tube, wherein, the overcoat is connected by the 3rd connector with the screen assemblies, and the base tube connects with the central tube
Connect, the throttling element is between the overcoat and the base tube, and the upper lid fits with the overcoat, wherein the described 3rd
Gap between connector and the central tube forms a part for the fluid passage.
22. self-adaptive controlled water installations according to claim 21, it is characterised in that second connector and/or described
3rd connector includes pipe sleeve, wherein, the edges at two ends of the pipe sleeve is equipped with sealing ring, and sealing ring protrudes from the pipe sleeve
Inner surface or outer surface.
23. self-adaptive controlled water installations according to claim 1, it is characterised in that the screen assemblies include being set in institute
The wrapping wire skeleton of central tube, the wrapping wire being set on the wrapping wire skeleton, the screen packs being set in outside the wrapping wire are stated, with
And it is set in the screen cloth oversheath outside the screen packs.
24. a kind of oil extraction system, including the flow string that is located at by packer in well and it is located in the flow string
Self-adaptive controlled water installations according to any one of claim 1-23.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199177.9A CN105089580B (en) | 2014-05-12 | 2014-05-12 | Self-adaptive controlled water installations and oil extraction system for oil extraction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199177.9A CN105089580B (en) | 2014-05-12 | 2014-05-12 | Self-adaptive controlled water installations and oil extraction system for oil extraction system |
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| CN105089580B true CN105089580B (en) | 2017-12-26 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939350B (en) * | 2016-10-12 | 2020-03-31 | 中国石油化工股份有限公司 | Selective inflow controller and completion string incorporating same |
| CN109958428B (en) * | 2017-12-22 | 2021-03-30 | 中国石油化工股份有限公司 | Selective inflow control device based on rotational flow resistance-increasing effect |
| CN111663924B (en) * | 2019-03-05 | 2022-09-27 | 中国石油化工股份有限公司 | Oil well water control and oil increasing device and method |
| CN109779578A (en) * | 2019-03-26 | 2019-05-21 | 西安石油大学 | Adaptive horizontal well control water conservancy project tool based on grease density contrast and eddy flow |
| CN112832723B (en) * | 2019-11-22 | 2022-12-09 | 中国石油化工股份有限公司 | Self-adaptive water control device for gas well and design method thereof |
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| US1802786A (en) * | 1927-08-26 | 1931-04-28 | Texas Iron Works Sales Corp | Screen support and anchor |
| US6227298B1 (en) * | 1997-12-15 | 2001-05-08 | Schlumberger Technology Corp. | Well isolation system |
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| CN105089580A (en) | 2015-11-25 |
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