CN107143305B - A kind of shaft bottom self-operated flow regulator - Google Patents
A kind of shaft bottom self-operated flow regulator Download PDFInfo
- Publication number
- CN107143305B CN107143305B CN201710504855.1A CN201710504855A CN107143305B CN 107143305 B CN107143305 B CN 107143305B CN 201710504855 A CN201710504855 A CN 201710504855A CN 107143305 B CN107143305 B CN 107143305B
- Authority
- CN
- China
- Prior art keywords
- fluid
- pressure
- flow
- removable cover
- spin chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
Abstract
The invention discloses a kind of shaft bottom self-operated flow control valves, it includes the valve body with eccentric eddy flow chamber inlet (101) and spin chamber outlet (103).It after fluid enters spin chamber (102), rotates, eddy flow surface pressure is P1, it is P that pressure plate (2), which intercepts spin chamber's (102) rotary fluid pressure,2, and pressure is P before fluid enters control valve3.Because process fluid flow has the pressure loss, P3>P2、P3>P1；According to eddy flow theory, P2>P1, comprehensive are as follows: P3>P2>P1.Movable link is in pressure difference △ P in control valvea=P3‑P1(△Pb=P2‑P1Or △ Pc=P3‑P2) move downward under driving, different viscosities fluid can generate different pressure difference △ Pa(△PbOr △ Pc).It can make through the fluid of control valve when being gas and water, flow is greatly reduced；When by the fluid of control valve being crude oil, flow is basically unchanged.It is finally reached the undesirable fluid of control, slows down its large area break through, extends the oil well service life, improve the purpose of field output and oil recovery factor.
Description
Technical field
The present invention relates to the regulating valves that oil pipe is controlled fluid flow into oil field.Eddy flow is based on more particularly, to a series of
Theory, for improving oil field control water and controlling the flow control valve of gas effect.The series regulating valve can at least be used for well of improving the standard
Water, gas control ability.
Background technique
Field operations personnel take a series of arrange to obtain more crude outputs and bigger oil recovery factor
It applies and is increased production.Such as: it is horizontal wells to stratum Implantation Energy (water filling, gas injection), or by the straight well exploitation development at initial stage,
To multi-branched horizontal well, the cluster well exploitation etc. in later period.These measures increase payzone and let out by slowing down strata pressure decrease speed
Pasta product can increase well oil output to a certain extent and improve oil recovery factor.But this also makes more original ask
Inscribe more serious, for example water, gas forms water cone, gas coning earlier, breaks through oil reservoir earlier, waterflood or gas is caused to flood.Horizontal well
Producing pressure differential is uneven for section, Permeability Distribution unevenly easily causes in horizontal well that there are serious imperfect flow sections, and this is not
Uniform Flow section is then to aggravate the main reason for water logging, gas flood.
For this purpose, devising a kind of shaft bottom self-operated flow regulator, the regulating valve is with movable in eddy flow theoretical basis
Component can preferably control reservoir fluid and flow into flow string, extend the oil well service life, improve crude output and recovery ratio.
Summary of the invention
The present invention provides a kind of shaft bottom self-operated flow regulator, which can postpone oil well water breakthrough, gas breakthrough time,
Weaken toe with effect, and after the breakthrough of water, gas, regulating valve can continue to work, effectively further control undesirable fluid, not the phase
It hopes fluid depending on oil reservoir concrete condition, can be water, is also possible to gas.
In one embodiment, a kind of shaft bottom self-operated flow regulator, which is characterized in that it includes: valve body (1a), takes
Pressing plate (2a), package (3), four part of removable cover (4a).Valve body (1a) is equipped with eccentric eddy flow chamber inlet (101), spin chamber goes out
Mouth (103), eccentric eddy flow chamber inlet (101) make fluid tangentially flow into spin chamber (102) along valve body (1a) inner wall, and in spin chamber
(102) rotation in；Pressure plate (2a) is fixed on valve body (1a), is equipped with pressure guide hole (201) in the pressure plate center (2a), is led
Pressure hole (201) generates upward thrust to removable cover (4a) for obtaining spin chamber (102) fluid pressure, the pressure；Package
(3) for connecting valve body (1a) and removable cover (4a), and elastic force is provided to removable cover (4a).
The removable cover upper surface (4a) active force downward by reservoir fluid, when removable cover (4a) unbalance stress can on
Lower movement can block eccentric eddy flow chamber inlet (101), reduce fluid flow during moving downward.
In another embodiment, a kind of shaft bottom self-operated flow regulator, which is characterized in that it include: valve body (1b),
Pressure plate (2b), package (3), four part of removable cover (4b).Valve body (1b) is equipped with eccentric eddy flow chamber inlet (101), spin chamber
It exports (103), eccentric eddy flow chamber inlet (101) makes fluid tangentially flow into spin chamber (102) along valve body (1b) inner wall, and in eddy flow
Rotation in room (102)；Pressure plate (2b) is fixed on valve body (1b), and is equipped with pressure guide hole in the pressure plate center (2b)
(201), pressure guide hole (201) generates upward push away to removable cover (4b) for obtaining spin chamber (102) fluid pressure, the pressure
Power；Package (3) provides elastic force for connecting valve body (1b) and removable cover (4b), and to removable cover (4b)；Removable cover (4b) following table
The closure element (401a) of face installation can follow removable cover (4b) to move up and down together.
The removable cover upper surface (4b) active force downward it is similarly subjected to reservoir fluid, upper and lower surface unbalance stress
When can generate up and down motion.
The closure element lower end (401a) is cone, spin chamber outlet (103) is blocked when moving downward, and make fluid
Flow reduces.
In another embodiment, a kind of shaft bottom self-operated flow regulator, which is characterized in that it include: valve body (1c),
Pressure plate (2c), sealing ring (203), (301) four part of spring.Valve body (1c) is equipped with eccentric eddy flow chamber inlet (101), eddy flow
Room exports (103), and fluid passes through eccentric eddy flow chamber inlet (101) and the eccentric entrance of pressure plate (2c) enters spin chamber (102), and
The rotation in spin chamber (102)；Pressure plate (2c) is located at valve inner, can move up and down, in the center pressure plate (2c)
It is sealed equipped with pressure guide hole (201), and between pressure plate (2c) and valve body (1c) by sealing ring (203)；Spring (301) both ends difference
It connects in the top lower surface valve body (1c) and the upper surface pressure plate (2c).
The eccentric entrance of the pressure plate (2c) is just being aligned before working with eccentric eddy flow chamber inlet (101), pressure plate (2c) In
During up and down motion, eccentric entrance and eccentric eddy flow chamber inlet (101) degree of registration reduce, so that fluid flow reduces.
The spring (301) can make pressure plate (2c) only move up and down, without rotating.
In another embodiment, a kind of shaft bottom self-operated flow regulator, which is characterized in that it include: valve body (1d),
Pressure plate (2d), sealing ring (203), (301) four part of spring.Valve body (1d) is equipped with eccentric eddy flow chamber inlet (101), eddy flow
Room exports (103), and eccentric eddy flow chamber inlet (101) makes fluid tangentially flow into spin chamber (102) along valve body (1d) inner wall, and is revolving
Rotation in flow chamber (102)；Pressure plate (2d) is located at valve inner, can move up and down, and center is equipped with pressure guide hole
(201), the closure element (401b) installed among pressure guide hole (201) can follow pressure plate (2d) to move up and down together, and take
It is sealed between pressing plate (2d) and valve body (1d) by sealing ring (203)；Spring (301) both ends are connect respectively in the top valve body (1d) following table
Face and the upper surface pressure plate (2d).
The closure element (401b) not exclusively blocks pressure guide hole (201), and fluid can allow for pass through pressure guide hole (201).
The closure element lower end (401b) is in inverted cone, spin chamber outlet (103) is blocked when moving upwards, and then make
Fluid flow reduces.
In further embodiment, a kind of shaft bottom self-operated flow regulator, which is characterized in that it include: valve body (1e),
Pressure plate (2e), elastic film (5) three parts.Valve body (1e) is equipped with eccentric eddy flow chamber inlet (101), spin chamber outlet
(103), eccentric eddy flow chamber inlet (101) makes fluid tangentially flow into spin chamber (102) along valve body (1e), and in spin chamber (102)
Interior rotation；Pressure plate (2e) is located above valve body (1e), is equipped with pressure guide hole (201) in the pressure plate center (2e)；Cavity
(202) it is separated between spin chamber (102) by elastic film (5).
The elastic film (5) can swing up and down, and spin chamber outlet (103) can be blocked when to lower swing.
When the present invention is changed using fluid behaviour (such as viscosity), fluid can generate different pressure, root in spin chamber (102)
Movable link is driven to move according to different pressure.
Advantage for present invention: can be according to regulating valve fluid velocity inside automatic identification fluid type is flowed into, when logical
When overregulate valve is undesirable fluid, movable link is moved, and closes eccentric eddy flow chamber inlet (101) or spin chamber outlet
(103), undesirable fluid flow is reduced；When passing through desired fluid, movable link movement is faint, to eccentric eddy flow chamber inlet
(101) it is not influenced with spin chamber outlet (103), it is expected that fluid flow reduction is fainter.
Detailed description of the invention
Fig. 1 is the complete eddy flow schematic diagram of fluid.
Schematic diagram is sectioned when Fig. 2 is fluid eddy flow.
Fig. 3 is a kind of first embodiment sectional view of shaft bottom self-operated flow regulator of the present invention.
Fig. 4 is a kind of second embodiment sectional view of shaft bottom self-operated flow regulator of the present invention.
Fig. 5 is a kind of third embodiment sectional view of shaft bottom self-operated flow regulator of the present invention.
Fig. 6 is a kind of 4th embodiment sectional view of shaft bottom self-operated flow regulator of the present invention.
Fig. 7 is a kind of 5th embodiment sectional view of shaft bottom self-operated flow regulator of the present invention.
Specific embodiment
Below with reference to each attached drawing, the invention will be further described.
Reservoir fluid pressure P3That fluid does not enter pressure before spin chamber (102), act on removable cover (4a, 4b) or
Elastic film (5) upper surface, direction are downward.Eddy flow surface pressure P1When being that fluid enters spin chamber (102) high speed rotation, the surfaces of revolution
Pressure, as shown in Figure 1.Swirling fluid sectional pressure P2When being that pressure plate (2a-1) sections swirling fluid along any level face
Pressure, as shown in Figure 2.Fluid has the pressure loss by eccentric eddy flow chamber inlet (101), so P3Greater than P2、P1, and according to
Eddy flow is theoretical, P2Greater than P1, comprehensive are as follows: P3>P2>P1。
Fig. 3 is the first embodiment schematic diagram of the invention.A kind of shaft bottom self-operated flow regulator, it includes: valve
Body (1a), pressure plate (2a), package (3), four part of removable cover (4a).Fluid is from eccentric eddy flow chamber inlet (101) along valve body
After (1a) inner wall tangentially enters spin chamber (102), rotate spin chamber (102) are inner, eddy flow surface pressure P1By pressure guide hole
(201) it is transferred in cavity (202), and acts on the lower surface removable cover (4a), and reservoir fluid P3Act on removable cover (4a)
Upper surface can export (103) in spin chamber (102) postrotational fluid through spin chamber and be discharged.Package (3) is for connecting valve body
(1a) and removable cover (4a), while preventing fluid to be directly entered cavity (202) without spin chamber (102), also to removable cover
(4a) provides elastic force.Removable cover (4a) in upward elastic force, upward pressure P1, downward pressure P3, downward four kinds of gravity works
It can move up and down under firmly.When fluid is the biggish crude oil of viscosity, P1It is larger, pressure difference △ Pa=P3-P1It is smaller, activity
Lid (4a) move downward displacement it is small, do not block eccentric eddy flow chamber inlet (101), oil flow do not influenced；When fluid is viscosity
When lesser water or gas, P1It is smaller, pressure difference △ Pa=P3-P1Larger, removable cover (4a) moves downward larger, and blocks spin chamber
Entrance (101) reduces water, throughput.
Fig. 4 is second of embodiment schematic diagram of the invention.A kind of shaft bottom self-operated flow regulator, it includes: valve
Body (1b), pressure plate (2b), package (3), four part of removable cover (4b).Fluid is from eccentric eddy flow chamber inlet (101) along valve body
After (1b) inner wall tangentially enters spin chamber (102), rotate spin chamber (102) are inner, eddy flow surface pressure P1By pressure guide hole
(201) it is transferred in cavity (202), and acts on the lower surface removable cover (4b), and reservoir fluid pressure P3Act on removable cover
The upper surface (4b) can export (103) in spin chamber (102) postrotational fluid through spin chamber and be discharged.Package (3) is used for connection valve
Body (1b) and removable cover (4b), while preventing fluid to be directly entered cavity (202) without spin chamber (102), also to activity
It covers (4b) and elastic force is provided.The lower surface removable cover (4b) is equipped with closure element (401a), passes through pressure guide hole (201) and reaches eddy flow
Room (102), lower end is in cone, and removable cover (4b) can be followed to move up and down.Removable cover (4b) upward elastic force, upwards
Pressure P1, downward pressure P3, can occur to transport up and down under downward gravity and closure element (401a) gravity multi-acting force
It is dynamic.When fluid is the biggish crude oil of viscosity, P1It is larger, pressure difference △ Pa=P3-P1Smaller, closure element (401a) follows activity
Lid (4b) move downward displacement it is small, do not block spin chamber outlet (103), oil flow is not influenced；When fluid is that viscosity is smaller
Water or gas when, P1It is smaller, pressure difference △ Pa=P3-P1It is larger that larger closure element (401a) follows removable cover (4b) to move downward,
And spin chamber outlet (103) is blocked, reduce water, throughput.
Fig. 5 is the third embodiment schematic diagram of the invention.A kind of shaft bottom self-operated flow regulator, it includes: valve
Body (1c), pressure plate (2c), sealing ring (203), (301) four part of spring.Fluid is from eccentric eddy flow chamber inlet (101) and pressure
After plate (2c) bias entrance enters spin chamber (102), rotate spin chamber (102) are inner, swirling fluid sectional pressure P2Make
Used in the lower surface pressure plate (2c), direction is upward, and eddy flow surface pressure P1It is inner that cavity (202) is transferred to by pressure guide hole (201),
And the upper surface pressure plate (2c) is acted on, direction is downward, and in spin chamber (102), postrotational fluid can be exported through spin chamber
(103) it is discharged.Sealing ring (203) is mounted on the outside of pressure plate (2c), prevents spin chamber (102) interior fluid along valve body (1c) inner wall
In into cavity (202).Spring (301) both ends are connect respectively in the top lower surface valve body (1c) and the upper surface pressure plate (2c), are removed
Downward elastic force can be generated to pressure plate (2c), moreover it is possible to prevent the pressure plate (2c) from rotating dislocation.Pressure plate (2c) In
Upward pressure P2, downward elastic force, downward pressure P1, can move up and down under downward gravity multi-acting force, work as stream
When body is viscosity biggish crude oil, the P of the lower surface pressure plate (2c) is acted on2It is smaller, and P1Will not be too small, pressure difference △ Pb=P2-
P1Smaller, pressure plate (2c) moves upwards that displacement is small, and eccentric eddy flow chamber inlet (101) and eccentric entrance degree of registration are high, does not influence
Oil flow；When fluid is the lesser water of viscosity or gas, the P of the lower surface pressure plate (2c) is acted on2It is larger, and P1It is smaller, pressure
Poor △ Pb=P2-P1Larger, pressure plate (2c) moves upwards displacement greatly, eccentric eddy flow chamber inlet (101) and eccentric entrance degree of registration
It reduces, water, throughput reduce.
Fig. 6 is the 4th kind of embodiment schematic diagram of the invention.A kind of shaft bottom self-operated flow regulator, it includes: valve body
(1d), pressure plate (2d), sealing ring (203), (301) four part of spring.Fluid is from eccentric eddy flow chamber inlet (101) along valve body
After (1d) tangentially enters spin chamber (102), rotate spin chamber (102) are inner, swirling fluid sectional pressure P2It acts on and takes
The lower surface pressing plate (2d), direction is upward, and eddy flow surface pressure P1It is inner that cavity (202) is transferred to by pressure guide hole (201), and is acted on
In the upper surface pressure plate (2d), (103) can be exported through spin chamber in spin chamber (102) postrotational fluid and are discharged.Sealing ring
(203) it is mounted on the outside of pressure plate (2d), prevents spin chamber (102) interior fluid from entering in cavity (202) along valve body (1d) inner wall.
Spring (301) both ends are connect respectively in the top lower surface valve body (1d) and the upper surface pressure plate (2d), and can be to pressure plate (2d)
Generate downward elastic force.Closure element (401b) is mounted on the lower surface pressure plate (2d), and lower end is located at eddy flow in inverted cone
Room exports below (103), and pressure plate (2d) can be followed to move up and down.Pressure plate (2d) is in the P that upwards pressure2, it is downward
Elastic force, downward pressure P1, can move up and down under downward gravity and closure element (401b) gravity multi-acting force, when
When fluid is viscosity biggish crude oil, the P of the lower surface pressure plate (2d) is acted on2It is smaller, and P1Will not be too small, pressure difference △ Pb
=P2-P1It is smaller, closure element (401b) follow pressure plate (2d) move upwards displacement it is small, do not block spin chamber outlet (103),
Oil flow is influenced smaller；When fluid is the lesser water of viscosity or gas, the P of the lower surface pressure plate (2d) is acted on2Become larger,
And P1Reduce, pressure difference △ Pb=P2-P1Larger, it is larger that closure element (401b) follows pressure plate (2d) to move upwards, and blocks rotation
Flow chamber outlet port (103) reduces water, throughput.
Fig. 7 is the 5th kind of embodiment schematic diagram of the invention.A kind of shaft bottom self-operated flow regulator, it includes: valve body
(1e), pressure plate (2e), elastic film (5) three parts.Fluid is cut from eccentric eddy flow chamber inlet (101) along valve body (1e) inner wall
To after entering spin chamber (102), rotate spin chamber (102) are inner, swirling fluid sectional pressure P2Act on elastic film
(5) lower surface, direction is upward, can export (103) through spin chamber in spin chamber (102) postrotational fluid and be discharged.Pressure plate
(2e) is covered above valve body (1e), and center is equipped with pressure guide hole (201), reservoir fluid pressure P3By pressure guide hole (201)
It imports cavity (202), acts on elastic film (5), direction is downward.Elastic film (5) is in the P that upwards pressure2, downward pressure
Power P3Under two kinds of active forces, it may occur that it swings up and down, when fluid is the biggish crude oil of viscosity, P2It is larger, pressure difference △ Pc=P3-P2
Smaller, elastic film (5) is smaller to lower swing, does not block spin chamber outlet (103)；When fluid is the lesser water of viscosity or gas
When, P2It is smaller, pressure difference △ Pc=P3-P2Larger, elastic film (5) is larger to lower swing, blocks spin chamber outlet (103), makes
Water, throughput reduce.
Claims (4)
1. a kind of shaft bottom self-operated flow regulator, it includes: valve body (1a-1), pressure plate (2a-1)；The valve body (1a-1)
Equipped with eccentric eddy flow chamber inlet (101), spin chamber outlet (103), it is respectively used to flow into fluid, flows out spin chamber (102)；Institute
Spin chamber (102) are stated for providing eddy flow place for fluid, the pressure plate (2a-1) is equipped with pressure guide hole (201) for obtaining rotation
Flow chamber (102) eddy flow surface pressure P1；
A kind of shaft bottom self-operated flow regulator further comprises package (3), removable cover (4a)；The package (3) is used
In preventing fluid to be directly entered cavity (202) without spin chamber (102) and provide upward elastic force to removable cover (4a)；Oil reservoir stream
Body pressure P3Act on the removable cover upper surface (4a) and constant, eddy flow surface pressure P1It acts on the removable cover lower surface (4a) and is revolving
Flow chamber (102) fluid reaches minimum when being water, gas, the pressure difference △ P that removable cover (4a) is subject at this timea=P3-P1It is very big, it is living simultaneously
Dynamic lid (4a) is very big to bottom offset；If spin chamber's (102) fluid is oil, the pressure difference △ P that removable cover (4a) is subject toa=P3-P1Very
Small, removable cover (4a) is to bottom offset very little.
2. a kind of shaft bottom self-operated flow regulator according to claim 1, it is characterised in that: include at least a bias
Eddy flow chamber inlet (101) makes fluid tangentially enter spin chamber (102) along valve body (1a-1) inner wall.
3. a kind of shaft bottom self-operated flow regulator according to claim 1, which is characterized in that removable cover (4a) is to bottom offset
Size determine that it blocks eccentric eddy flow chamber inlet (101) degree, it is final to determine that fluid flow reduces degree.
4. a kind of shaft bottom self-operated flow regulator according to claim 1, which is characterized in that removable cover (4a) includes closing
It closes component (401a), the closure element lower end (401a) is cone, when moving downward, spin chamber outlet (103) can be blocked,
Reduce fluid flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504855.1A CN107143305B (en) | 2017-06-28 | 2017-06-28 | A kind of shaft bottom self-operated flow regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504855.1A CN107143305B (en) | 2017-06-28 | 2017-06-28 | A kind of shaft bottom self-operated flow regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107143305A CN107143305A (en) | 2017-09-08 |
| CN107143305B true CN107143305B (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710504855.1A Expired - Fee Related CN107143305B (en) | 2017-06-28 | 2017-06-28 | A kind of shaft bottom self-operated flow regulator |
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| CN (1) | CN107143305B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110685654B (en) * | 2019-10-29 | 2021-11-26 | 中国石油化工股份有限公司 | Small-diameter intelligent injection allocation device and use method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201434117Y (en) * | 2009-02-26 | 2010-03-31 | 德威华泰（北京）科技有限公司 | Whirl valve capable of controlling flow automatically |
| CN105650312A (en) * | 2016-03-11 | 2016-06-08 | 西南石油大学 | Novel automatic water control valve for horizontal wells |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10125880B2 (en) * | 2015-08-11 | 2018-11-13 | Ge Aviation Systems Llc | Air pressure regulator |
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2017
- 2017-06-28 CN CN201710504855.1A patent/CN107143305B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201434117Y (en) * | 2009-02-26 | 2010-03-31 | 德威华泰（北京）科技有限公司 | Whirl valve capable of controlling flow automatically |
| CN105650312A (en) * | 2016-03-11 | 2016-06-08 | 西南石油大学 | Novel automatic water control valve for horizontal wells |
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| CN107143305A (en) | 2017-09-08 |
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Inventor after: Li Haitao Inventor after: Cui Xiaojiang Inventor after: Liu Yigang Inventor after: Wang Nan Inventor after: Zhang Jianfeng Inventor after: Luo Hongwen Inventor after: Liu Chang Inventor after: Tang Mingdeng Inventor before: Li Haitao Inventor before: Cui Xiaojiang Inventor before: Zhang Jianfeng Inventor before: Luo Hongwen Inventor before: Liu Chang Inventor before: Tang Mingdeng |
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Effective date of registration: 20200526 Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: SOUTHWEST PETROLEUM University Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee after: CNOOC TIANJIN BRANCH Address before: No. 8 Road, Xindu Xindu District of Chengdu city of Sichuan Province in 610500 Patentee before: SOUTHWEST PETROLEUM University |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191203 Termination date: 20210628 |