CN105840894A - Viscosity-sensitive flow control valve - Google Patents
Viscosity-sensitive flow control valve Download PDFInfo
- Publication number
- CN105840894A CN105840894A CN201610239791.2A CN201610239791A CN105840894A CN 105840894 A CN105840894 A CN 105840894A CN 201610239791 A CN201610239791 A CN 201610239791A CN 105840894 A CN105840894 A CN 105840894A
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- Prior art keywords
- floating plate
- valve
- stopping means
- valve gap
- described valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Sliding Valves (AREA)
Abstract
The invention belongs to the technical field of water control of well completion construction operation and discloses a viscosity-sensitive flow control valve. A floating disc limiting device is arranged between a valve cover and a valve bottom; the valve cover, the floating disc limiting device and the valve bottom are connected and fixed via bolts; a floating disc is arranged between the floating disc limiting device and the valve bottom; the upper surface of the floating disc is a conical sealing surface; the surfaces opposite to the floating disc of the valve cover and the floating disc limiting device are conical sealing surfaces and are located on the same plane; formation fluid flows in via a fluid inlet in the valve cover, then successively flows through a flow-through channel between the floating disc and the valve cover, a flow-through channel between the floating disc limiting device and the valve cover and flow-through holes of the floating disc limiting device and finally flows out via oil outlet holes in the valve bottom. Through the viscosity-sensitive flow control valve, the normal production is carried out when the oil content is high; the floating disc can automatically float up to reduce the opening degree of the valve under the action of liquid pressure difference when the viscosity-reduced flow flows through the flow control valve during formation water production; the yield of the water is inhibited; the purposes of stabilizing oil and controlling water of production wells can be achieved.
Description
Technical field
The invention belongs to completion construction operation water control technique field, specifically, relate to the flow control valve of a kind of viscosity sensitive.
Background technology
In the middle and later periods of oilfield exploitation, oil reservoir water content can be substantially increased, and brings a lot of problem to follow-up process, wastes many resources.Such as, in oil well production process, after the water breakthrough of local, easy erosion sand control pipe causes sand control to lose efficacy；Moisture content steeply rises and is likely to corrode electric pump blade guiding wheel, causes sand plug after causing holddown or termination of pumping；Moisture content is too high also can increase the load that platform profit processes, and causes production cost to increase；If using re-injection mode can additionally take the resources of production it addition, isolated excess produces water.Current horizontal well control water aspect commonly uses sieve tube water control device, but the complex process related to, instrument is more, the most relatively costly.Additionally, abroad also there is flow control valve, but can not regulate fluid flow according to fluid viscosity, function is limited.
Therefore, for being effectively improved oil well yield, reduce oil field output moisture content, reduce production cost, in the urgent need to during completion practice, take to control water measure according to the aqueous situation of oil reservoir.
Summary of the invention
The present invention is to solve prior art cannot take to control the technical problem of water measure according to the aqueous situation of oil reservoir, the flow control valve of a kind of viscosity sensitive is provided, it can be according to the aperture size of the liquid viscosity difference control valve flow through, when oil reservoir water content is low, how fuel-displaced realization is increased by the aperture of flow control valve, when oil reservoir water content height, reduced by the aperture of flow control valve and realize few water outlet, and then reach to control the purpose of the flow of stratum liquid access wall cylinder, ensure few water outlet of recovering the oil more, there is the highest practical value.
In order to solve above-mentioned technical problem, the present invention is achieved by following technical scheme:
A kind of flow control valve of viscosity sensitive, including at the bottom of valve gap and valve, it is provided with floating plate stopping means between at the bottom of described valve gap and described valve, connect fixing by the bolt that hoop is uniform at the bottom of described valve gap, described floating plate stopping means and described valve, at the bottom of described floating plate stopping means and described valve between be placed with floating plate；
Described bonnet lower is provided with endoporus, and top center is provided with the fluid intake of up/down perforation；Described valve gap hoop is evenly equipped with the bolt hole for installing described bolt；
Being arranged at bottom the endoporus of described valve gap at the bottom of described valve, hoop is evenly equipped with the screwed hole for installing described bolt；Perimembranous at the bottom of described valve is provided with oil outlet；
Described floating plate stopping means is ring structure, between it is arranged at the bottom of described valve gap and described valve, and is seated at the bottom of valve；Described floating plate stopping means hoop is evenly equipped with the bolt hole for installing described bolt；Described floating plate stopping means is provided with flowing hole corresponding to the oil outlet at the bottom of described valve, and is connected with the oil outlet at the bottom of described valve；
Described floating plate is conical shell structure, is placed in the space formed with the endoporus end face of described valve gap at the bottom of described floating plate stopping means, described valve；Described floating plate upper face is conical seal (contact) face, and described valve gap and described floating plate stopping means are disposed as conical seal (contact) face relative to the surface of described floating plate, and the conical seal (contact) face of described valve gap and described floating plate stopping means is at grade；
Between described valve gap and described floating plate stopping means, between described valve gap and described floating plate, it is respectively provided with gap, the flow channels that can enable flow through with formation；Formation fluid can flow into through the fluid intake of described valve gap, then sequentially pass through the flow channels between described floating plate and described valve gap, the flow channels between described floating plate stopping means and described valve gap, the flowing hole of described floating plate stopping means, finally flowed out by the oil outlet at the bottom of described valve.
Wherein, it is round-corner transition between fluid intake and its top planes of described valve gap.
Wherein, the outer surface of revolution bottom of described valve gap is provided with external screw thread, and top is provided with boss, and boss bottom is provided with o-ring groove.
Wherein, described bonnet lower is provided with arc groove relative to the position of described floating plate stopping means, so that the flow channels rounding off between described valve gap and described floating plate stopping means.
Wherein, it is provided with clearance hole in the middle part of at the bottom of described valve.
The invention has the beneficial effects as follows:
The flow control valve of the viscosity sensitive of the present invention can be to the different viscosities automatic control fluid valve body aperture flowed into, it is achieved few water outlets of recovering the oil more.The flow control valve of this viscosity sensitive is entered under during completion practice, normally produce when oil content height, and fluid viscosity reduces when formation water output, when low viscous fluid flows through this flow control valve, under the effect of fluid pressure differential, floating plate can automatically float thus reduce valve opening, the output of suppression water, finally realizes the purpose of producing well surely oil control water.
Accompanying drawing explanation
Fig. 1 is the structural representation of the flow control valve of viscosity sensitive provided by the present invention；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the first outside drawing of the flow control valve of viscosity sensitive provided by the present invention；
Fig. 4 is the second outside drawing of the flow control valve of viscosity sensitive provided by the present invention.
In above-mentioned figure: 1, valve gap；2, floating plate stopping means；3, floating plate；4, at the bottom of valve；5, bolt.
Detailed description of the invention
For present disclosure, feature and effect can be further appreciated that, hereby enumerate following example, and it be as follows to coordinate accompanying drawing to describe in detail:
As shown in Figures 1 to 4, present embodiments provide the flow control valve of a kind of viscosity sensitive, including at the bottom of valve gap 1, floating plate stopping means 2, floating plate 3, valve 4, bolt 5.At the bottom of valve gap 1, floating plate stopping means 2 and valve, 4 are linked together by the bolts 5 that hoop is uniform, and floating plate stopping means 2 is installed at the bottom of valve gap 1 and valve between 4, and floating plate 3 is placed at the bottom of floating plate stopping means 2 and valve between 4.
Valve gap 1 is the lid with circular cross section, and its underpart is provided with endoporus, is used for installing 4, floating plate stopping means 2 and floating plate 3 at the bottom of valve.The outer surface of revolution bottom of valve gap 1 is provided with external screw thread, for being connected with control water nipple body；The outer surface of revolution top of valve gap 1 is provided with boss, and boss bottom is provided with o-ring groove, is used for installing sealing ring, to ensure the sealing between valve gap 1 and control water nipple body.Valve gap 1 hoop has been evenly arranged bolt hole, is used for installing bolt 5, thus completes to be connected with at the bottom of floating plate stopping means 2 and valve 4.Valve gap 1 is provided centrally with the fluid intake of up/down perforation, is round-corner transition between fluid intake and valve gap 1 top planes, to ensure that fluid flows into valve gap 1 smoothly and reduces the erosion effect to valve body.Valve gap 1 bottom is provided with arc groove corresponding to the position of floating plate stopping means 2, in order to make to be formed between valve gap 1 and floating plate stopping means 2 the roundest and the most smooth flow channels.Valve gap 1 bottom is provided with conical seal (contact) face corresponding to the position of floating plate 3, so when after floating plate 3 upper surface with the conical seal (contact) face laminating of valve gap 1, fluid can be stoped to flow through.
At the bottom of valve, 4 is disc structure, is installed on bottom valve gap 1 and blocks its underpart endoporus.4 hoops at the bottom of valve are disposed with the screwed hole corresponding with the bolt hole of valve gap 1 equably, for being completed the connection of 4 at the bottom of valve gap 1, floating plate stopping means 2 and valve by bolt 5.At the bottom of valve, 4 go back hoop and are evenly arranged the oil outlet of up/down perforation, and for being discharged by fluid, each oil outlet is between adjacent two screwed holes.At the bottom of valve, the middle part of 4 is provided with the clearance hole that some diameters are less, is possible to prevent because at the bottom of valve, 4 amass sand and cause flow-control defective valve.
Floating plate stopping means 2 is ring structure, and it is arranged at the bottom of valve gap 1 and valve between 4, and is seated at the bottom of valve on 4.Floating plate stopping means 2 hoop is disposed with the bolt hole corresponding with the screwed hole of 4 at the bottom of the bolt hole of valve gap 1, valve equably, for being connected with at the bottom of valve gap 1 and valve 4 by bolt 5.Floating plate stopping means 2 hoop is disposed with the flowing hole of up/down perforation equably, is used for enabling flow through, and this flowing hole is with at the bottom of valve, the oil outlet of 4 is corresponding and connects.Form flow channels between floating plate stopping means 2 and valve gap 1 (being provided with arc groove), can enable flow through.Floating plate stopping means 2 is provided with conical seal (contact) face corresponding to the position of floating plate 3, so can ensure that the conical seal (contact) face of floating plate 3 upper surface and floating plate stopping means 2 is fitted completely thus stoped fluid to flow through.The conical seal (contact) face of valve gap 1 and the conical seal (contact) face of floating plate stopping means 2 at grade, thus can realize can completely fitting with floating plate stopping means 2 and valve gap 1 and realizing complete switching off of fluid simultaneously when floating plate 3 is in upper.
The hollow cone shell structure that floating plate 3 is made up of steel alloy, is placed at the bottom of floating plate stopping means 2, valve in 4 spaces formed with valve gap 1 end face.Floating plate 3 is designed as conical structure, and so when bias occurs in floating plate 3, the active force of fluid will make it automatically return to center.The conical surface of floating plate 3 is set to sealing surface, conical seal (contact) face with floating plate stopping means 2 and valve gap 1 can completely fit simultaneously, stop fluid to pass through when such floating plate 3 is in upper.Form flow channels between floating plate 3 and valve gap 1, can enable flow through.
The course of work of the present invention is as follows:
The flow control valve of this viscosity sensitive is entered under during completion practice, normally produce oil content height when, formation fluid flows into through the fluid intake of valve gap 1, sequentially passes through the oil outlet outflow of at the bottom of the flow channels between the flow channels between floating plate 3 and valve gap 1, floating plate stopping means 2 and valve gap 1, the flowing hole of floating plate stopping means 2, valve 4.When water content of oil well rises, fluid viscosity reduces, when liquid flows through the flow control valve of viscosity sensitive, pressure reduction promotes floating plate 3 to rise up and down, now the gap between floating plate 3 and floating plate stopping means 3, between floating plate 3 and valve gap 1 diminishes, and then reduce the aperture of flow control valve, when water content rises to certain proportion, fluid viscosity reaches the close value of valve design, then between floating plate 3 and floating plate stopping means 3, fit completely between floating plate 3 and valve gap 1, valve body is closed, and finally realizes the purpose of control formation water output.It addition, the flow control valve interior shape of the present invention meets fluid flow characteristics, the fluid erosion effect to valve inner can be reduced.
Although the preferred embodiments of the present invention being described above in conjunction with accompanying drawing; but the invention is not limited in above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematically; it is not restrictive; those of ordinary skill in the art is under the enlightenment of the present invention; in the case of without departing from invention objective and scope of the claimed protection, it is also possible to make the concrete conversion of a lot of form, within these belong to protection scope of the present invention.
Claims (5)
1. a flow control valve for viscosity sensitive, including at the bottom of valve gap and valve, it is characterised in that described valve gap and described valve
Floating plate stopping means it is provided with, by spiral shell that hoop is uniform at the bottom of described valve gap, described floating plate stopping means and described valve at the end
Tether connect fixing, at the bottom of described floating plate stopping means and described valve between be placed with floating plate；
Described bonnet lower is provided with endoporus, and top center is provided with the fluid intake of up/down perforation；Described valve gap hoop is uniform
There is the bolt hole for installing described bolt；
Being arranged at bottom the endoporus of described valve gap at the bottom of described valve, hoop is evenly equipped with the screwed hole for installing described bolt；Described
At the bottom of valve, perimembranous is provided with oil outlet；
Described floating plate stopping means is ring structure, between it is arranged at the bottom of described valve gap and described valve, and is seated at the bottom of valve
On；Described floating plate stopping means hoop is evenly equipped with the bolt hole for installing described bolt；Described floating plate stopping means is corresponding
Oil outlet at the bottom of described valve is provided with flowing hole, and is connected with the oil outlet at the bottom of described valve；
Described floating plate is conical shell structure, is placed on the endoporus top with described valve gap at the bottom of described floating plate stopping means, described valve
In the space that face is formed；Described floating plate upper face is conical seal (contact) face, and described valve gap is relative with described floating plate stopping means
It is disposed as conical seal (contact) face in the surface of described floating plate, and the conical seal (contact) face of described valve gap and described floating plate stopping means exists
On same plane；
Between described valve gap and described floating plate stopping means, it is respectively provided with gap between described valve gap and described floating plate, to form energy
The flow channels enough enabled flow through；Formation fluid can flow into through the fluid intake of described valve gap, then sequentially passes through described floating
Flow channels between dish and described valve gap, the flow channels between described floating plate stopping means and described valve gap, described floating plate
The flowing hole of stopping means, is finally flowed out by the oil outlet at the bottom of described valve.
The flow control valve of a kind of viscosity sensitive the most according to claim 1, it is characterised in that the stream of described valve gap
It it is round-corner transition between body entrance and its top planes.
The flow control valve of a kind of viscosity sensitive the most according to claim 1, it is characterised in that outside described valve gap
Surface of revolution bottom is provided with external screw thread, and top is provided with boss, and boss bottom is provided with o-ring groove.
The flow control valve of a kind of viscosity sensitive the most according to claim 1, it is characterised in that described bonnet lower
The position of described floating plate stopping means is provided with arc groove, so that between described valve gap and described floating plate stopping means
Flow channels rounding off.
The flow control valve of a kind of viscosity sensitive the most according to claim 1, it is characterised in that in the middle part of at the bottom of described valve
It is provided with clearance hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610239791.2A CN105840894B (en) | 2016-04-18 | 2016-04-18 | A kind of flow control valve of viscosity sensitive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610239791.2A CN105840894B (en) | 2016-04-18 | 2016-04-18 | A kind of flow control valve of viscosity sensitive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105840894A true CN105840894A (en) | 2016-08-10 |
| CN105840894B CN105840894B (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610239791.2A Active CN105840894B (en) | 2016-04-18 | 2016-04-18 | A kind of flow control valve of viscosity sensitive |
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| Country | Link |
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| CN (1) | CN105840894B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763884A (en) * | 2017-01-06 | 2017-05-31 | 中国海洋石油总公司 | A kind of steady oily water control valve |
| CN107120094A (en) * | 2016-02-24 | 2017-09-01 | 北京卫星制造厂 | A kind of fluid regulation apparatus with self-locating function |
| WO2018103348A1 (en) * | 2016-12-08 | 2018-06-14 | 王睿琦 | Worm drive-based constant-flow slit type inlet and outlet port |
| WO2018103349A1 (en) * | 2016-12-08 | 2018-06-14 | 王睿琦 | Slotted port having constant-flow for eliminating influence of viscosity |
| CN108843801A (en) * | 2018-07-05 | 2018-11-20 | 中国海洋石油集团有限公司 | A kind of float-type water control valve |
| CN112780236A (en) * | 2019-11-07 | 2021-05-11 | 中国石油天然气股份有限公司 | Oil-stabilizing water-controlling device and oil-stabilizing water-controlling pipe column |
| CN114370253A (en) * | 2022-01-14 | 2022-04-19 | 西南石油大学 | Water-blocking and oil-increasing tool for stabilizing pressure during gravel filling and stratum blockage removal |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4342329A (en) * | 1980-08-26 | 1982-08-03 | Roff Robert William | Breather valve |
| US4488702A (en) * | 1983-09-29 | 1984-12-18 | Lapeyre James M | Rolling diaphragm metering valve |
| US4899855A (en) * | 1987-03-06 | 1990-02-13 | Carbon Christian B De | Piston assembly having an outer skirt and a spaced inner core |
| CN201236988Y (en) * | 2008-01-25 | 2009-05-13 | 上海富地阀门有限公司 | Dynamic flow equalizing valve |
| CN104314530A (en) * | 2014-10-16 | 2015-01-28 | 中国石油天然气股份有限公司 | Inflow control device |
| CN104364464A (en) * | 2012-03-21 | 2015-02-18 | 英孚罗控制股份有限公司 | A flow control device and method |
| US20160031285A1 (en) * | 2013-03-15 | 2016-02-04 | Levant Power Corporation | Multi-path fluid diverter valve |
| CN105650312A (en) * | 2016-03-11 | 2016-06-08 | 西南石油大学 | Novel automatic water control valve for horizontal wells |
| CN205806583U (en) * | 2016-07-02 | 2016-12-14 | 杭州华艺喷泉设备有限公司 | Can Fast Installation for view air blast fountain quickly without pressure water intaking anti-backflow assembly |
-
2016
- 2016-04-18 CN CN201610239791.2A patent/CN105840894B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4342329A (en) * | 1980-08-26 | 1982-08-03 | Roff Robert William | Breather valve |
| US4488702A (en) * | 1983-09-29 | 1984-12-18 | Lapeyre James M | Rolling diaphragm metering valve |
| US4899855A (en) * | 1987-03-06 | 1990-02-13 | Carbon Christian B De | Piston assembly having an outer skirt and a spaced inner core |
| CN201236988Y (en) * | 2008-01-25 | 2009-05-13 | 上海富地阀门有限公司 | Dynamic flow equalizing valve |
| CN104364464A (en) * | 2012-03-21 | 2015-02-18 | 英孚罗控制股份有限公司 | A flow control device and method |
| US20160031285A1 (en) * | 2013-03-15 | 2016-02-04 | Levant Power Corporation | Multi-path fluid diverter valve |
| CN104314530A (en) * | 2014-10-16 | 2015-01-28 | 中国石油天然气股份有限公司 | Inflow control device |
| CN105650312A (en) * | 2016-03-11 | 2016-06-08 | 西南石油大学 | Novel automatic water control valve for horizontal wells |
| CN205806583U (en) * | 2016-07-02 | 2016-12-14 | 杭州华艺喷泉设备有限公司 | Can Fast Installation for view air blast fountain quickly without pressure water intaking anti-backflow assembly |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120094A (en) * | 2016-02-24 | 2017-09-01 | 北京卫星制造厂 | A kind of fluid regulation apparatus with self-locating function |
| CN107120094B (en) * | 2016-02-24 | 2019-09-06 | 北京卫星制造厂 | A kind of fluid regulation apparatus with self-locating function |
| WO2018103348A1 (en) * | 2016-12-08 | 2018-06-14 | 王睿琦 | Worm drive-based constant-flow slit type inlet and outlet port |
| WO2018103349A1 (en) * | 2016-12-08 | 2018-06-14 | 王睿琦 | Slotted port having constant-flow for eliminating influence of viscosity |
| CN106763884A (en) * | 2017-01-06 | 2017-05-31 | 中国海洋石油总公司 | A kind of steady oily water control valve |
| CN106763884B (en) * | 2017-01-06 | 2019-12-13 | 中国海洋石油集团有限公司 | Oil-stabilizing water control valve |
| CN108843801A (en) * | 2018-07-05 | 2018-11-20 | 中国海洋石油集团有限公司 | A kind of float-type water control valve |
| CN112780236A (en) * | 2019-11-07 | 2021-05-11 | 中国石油天然气股份有限公司 | Oil-stabilizing water-controlling device and oil-stabilizing water-controlling pipe column |
| CN114370253A (en) * | 2022-01-14 | 2022-04-19 | 西南石油大学 | Water-blocking and oil-increasing tool for stabilizing pressure during gravel filling and stratum blockage removal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105840894B (en) | 2018-02-23 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Energy Development Co., Ltd. Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Energy Development Co., Ltd. Patentee before: China National Offshore Oil Corporation |