CN105164365B - The system and method flowed in pipeline are controlled using finger valve - Google Patents
The system and method flowed in pipeline are controlled using finger valve Download PDFInfo
- Publication number
- CN105164365B CN105164365B CN201380074589.3A CN201380074589A CN105164365B CN 105164365 B CN105164365 B CN 105164365B CN 201380074589 A CN201380074589 A CN 201380074589A CN 105164365 B CN105164365 B CN 105164365B
- Authority
- CN
- China
- Prior art keywords
- base tube
- sleeve
- sliding sleeve
- finger valve
- valve according
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000002430 hydrocarbons Chemical class 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
This document describes a kind of system and method for being controlled using finger valve and being flowed in pipeline.Specifically, disclosed herein is a kind of finger valve, which includes base tube and sliding sleeve.The base tube may include that a fingers are connected to base tube by finger openings, one or more fingers and one or more hinges, each hinge.Sliding sleeve may include the first sleeve with inner surface, which includes gap and lower laminate.First sleeve is operably positioned at first position and the second position.In first position, which is pushed into closed position for one or more fingers.In the second position, which allows the one or more fingers in an open position around one of one or more fingers.
Description
Background technique
The present invention relates to a kind of system and method for being controlled using finger valve and being flowed in tubing string.
In these years, the demand of natural gas and petroleum significantly increases, and makes the oil and natural gas reservoir warp that production efficiency is low
It is feasible in Ji, key player is play in the production of energy of hydraulic fracturing in the world.In decades, different technologies has been
The method for being used to improve the resources of production from oil and natural gas.So that long horizontal hole is had multiple cracks is a kind of for mentioning
The conventional process of oil-gas mining in high well.The technique starts from that well has been drilled and complete part has been mounted on after wellbore.It is multistage
Section fracturing process is related to the water that will largely pressurize or gel, proppant and/or other chemicals are pumped into wellbore, along wellbore
Reservoir in generate multiple discrete fractures.
A kind of advanced method currently in use be in a pumping operation and meanwhile carry out up to 30 cracks branch
Support agent pressure break.This method is related to the use of the proppant for preventing crack from closing.However, this way normally results in crack
Between proppant uneven distribution, this will reduce the efficiency of frac system.As a result, this way may also lead to crack
Spread to the region far from target reservoir.Therefore, such method may be inefficient and unsafe.
In addition, support fracturing generally includes multiple steps and needs multiple tools, could successfully carry out.This way will
The uneven distribution of proppant between crack is caused, and is highly dependent on the setting plug between each pressure break stage or uses larger
Pressure break ball.In these methods, each crack is perforated or is pumped into rear settable plug or pressure break ball and can be fallen into from surface
To be continuously on the fracturing valve being distributed along well.For each stage, the ball of different-diameter is fallen into corresponding to specific fracturing valve
In the well of valve seat.At any of oil well, since borehole diameter reduces, which be will not pass through.Once ball is in place, pressure break
It carries out.After pressure break, plug must be drilled out and ball must be recovered.In each pressure break stage, be arranged plug when, the excessive time and
Energy, which is consumed, to be left hole between the stages and drills out beyond the Great Wall.In addition, inland rig usually pays rent by number of days, it is any
Delay may all make increased costs many.In addition, in ball method, it is difficult to due to small bulb diameter because of the big pressure loss
Pressure break, so that before flow region is restricted, it is only possible to which there are about 12 different pressure break stages.
Therefore it provides a kind of system and method flowed in tubing string that controlled using finger valve are useful.
Summary of the invention
This document describes a kind of system and method for being controlled using finger valve and being flowed in tubing string.Specifically, the present invention retouches
A kind of finger valve is stated, the finger valve includes base tube and sliding sleeve.The base tube includes: finger openings, one or more
One fingers is connected to the base tube by fingers and one or more hinges, each hinge.The sliding
Sleeve may include: the first sleeve with inner surface, and the inner surface includes gap and lower laminate.The first sleeve can be grasped
Make ground and is located at first position and the second position.In the first position, the lower laminate pushes away one or more of fingers
Enter closed position.In the second position, one of the gap is around one or more of fingers, allow it is one or
Multiple fingers are in an open position.
It is connected using finger valve control by the method for the flowing of tubing string, including in tubing string invention further describes a kind of
Base tube and driving sliding sleeve from first position to the second position the step of.The base tube may include finger openings, one or
One fingers is connected to the base tube by multiple fingers and one or more hinges, each described hinge.Institute
Stating sliding sleeve may include first sleeve, and the first sleeve includes inner surface, and the inner surface includes gap and lower laminate.
In the first position, one or more of fingers are pushed into closed position by the lower laminate.In the second position, institute
Gap is stated around one of one or more of fingers, allows one or more of fingers in an open position.
Detailed description of the invention
Fig. 1 shows the side view of base tube.
Figure 1B shows the front view of base tube.
Fig. 1 C shows the cross-sectional view of base tube.
Fig. 1 D shows the another cross-sectional view of base tube.
Fig. 2A shows sliding sleeve, is connected to fixes sleeve by actuator and is aligned with fixes sleeve.
Fig. 2 B shows the front view of sliding sleeve.
Fig. 2 C shows the cross-sectional view of sliding sleeve.
Fig. 2 D shows the cross-sectional view of sliding sleeve, further includes having actuator and fixes sleeve.
Fig. 3 A shows the periphery figure of outer ring.
Fig. 3 B shows the front view of outer ring.
Fig. 4 A shows valve casing.
Fig. 4 B shows the pressure break mouth of valve casing.
Fig. 4 C shows the production slot of valve casing.
Fig. 5 shows the finger valve in close pattern.
Fig. 6 shows the finger valve in opening mode.
Specific embodiment
This document describes a kind of system and method that fluid in tubing string is controlled using finger valve.The description for being hereafter in makes
The claimed invention can be manufactured and used and by specific embodiment discussed below by obtaining those skilled in the art
It provides, the modification of specific embodiments described below is apparent to those skilled in the art.For the sake of clarity,
It is not that all features actually realized are described in the present specification.It should be understood that any this actual implementation (such as
In any exploration project) exploitation in, it is necessary to carry out accurate design to realize that the specific objective of designer (such as meets and is
System limitation related to business), and these targets are different for different embodiments.It should also be appreciated that this exploitation
Effort may be complicated and time-consuming, but for the those of ordinary skill in the relevant art field for having benefited from the disclosure
By only normal work to do.Correspondingly, claims appended hereto is not intended to be limited by the disclosed embodiments, but
The widest scope consistent with principle disclosed herein and feature should be endowed.
Figure 1A shows the side view of base tube 100.Base tube can connect a part as tubing string.In one embodiment,
Base tube 100 can be cylindrical shape, and including fingers 101 and finger openings 102.Figure 1B shows fingers 101,101 energy of fingers
Base tube 100 is enough connected to by hinge 103.In one embodiment, the first biasing device 104 can also connect base tube 100
To fingers 101.In another embodiment, the first biasing device 104 can be operative as a part of hinge 103.
By the way that the first biasing device is connected to fingers 101 and base tube 102, fingers can be biased into one and open or close
Position.For exemplary purposes, the present invention shows the fingers 101 for being biased into open position.In one embodiment, base tube
100 can also include first part and/or the production mouth 106 of pressure break mouth 105.The first part of pressure break mouth 105 can be by one
Or multiple openings are formed, and production mouth 106 can also be formed by one or more openings of base tube 100.
Fig. 1 C shows the front view of base tube 100.Base tube 100 can also include chamber 107.When fingers 101 are in open position
When setting, chamber 107 can be the cavity for allowing material to pass through or opening.However, when fingers 101 are in the closed position, finger
Part 101 forms a significant or complete blocking to chamber 107 together, essentially or fully material is prevented to pass through base tube
100。
It further includes the section for having the base tube 100 of basic ring 108 that Fig. 1 D, which is shown,.In one embodiment, finger openings 102 can be
The multiple holes radially spaced apart around base tube 100.In another embodiment, finger openings 102 can be the cylinder that base tube 100 lacks
Section.The first part of pressure break mouth 105 can be circular layout around the middle part of base tube 100.Production mouth 106 can surround base tube 100
Tail portion be circular layout.
Fig. 2A shows sliding sleeve 200, is connected to fixes sleeve by actuator 208 and is aligned with outer ring 209.One
In a embodiment, sliding sleeve 200 can be cylinder-shaped material, may include the second part of pressure break mouth 105.In a reality
It applies in example, sliding sleeve 200 can have the opening for being large enough to installation base tube 100.Fig. 2 B shows facing for sliding sleeve 200
Figure.Sliding sleeve 200 can also include sleeve cavity 201.Sleeve cavity 201 can be the opening for being sufficiently large to receive base tube 100.
Fig. 2 C shows the cross-sectional view of sliding sleeve 200.Sliding sleeve 200 may include first sleeve 202 and second sleeve
203.In addition, first sleeve 202 and second sleeve 203 can be connected by one or more arc-like sheets 204, arc-like sheet 204 it
Between space limit a part of pressure break mouth 105.The inner surface of first sleeve 202 may include surface characteristics, these surfaces
Feature and one or more fingers 101 interact.Surface characteristics may include fisrt feature and second feature.Fisrt feature
It can be one or more gaps 205 and second feature can be the pushing that fingers 101 can be moved to closed position
Body (depressor) 206.Gap 205 can radially extend or position around entire internal diameter, the circle segment internal diameter of base tube 100
In single radial position.If the end of inner surface can have than the gap smaller diameter entirely around internal diameter.If
It is positioning, gap 205 may include multiple positioning pits, and multiple positioning pit is positioned to the interior table radially around sliding sleeve 200
Face.
Fig. 2 D show further comprise fixes sleeve 207 sliding sleeve 200 cross-sectional view, fixes sleeve 207 passes through cause
Dynamic device 208 is connected in fixes sleeve 207, and is aligned with outer ring 209.In one embodiment, actuator 208 can be such as
The biasing device of spring.The second sleeve 203 of sliding sleeve 200 can use actuator 208 and be connected to fixes sleeve 207.?
In one embodiment, actuator 208 is biasing device, and sliding sleeve 200 can be pulled towards fixes sleeve 207, to press
Contracting or otherwise carrying have the biasing device 208 of potential energy.Then biasing device 208 can be released or excite, and push
Sliding sleeve 200 leaves fixes sleeve 207.In another embodiment, actuator 208 can return to sliding sleeve 200
Original position.Although fixes sleeve 207 is described as cylinder in above each figure, its in practice may not be continuous
Ring.On the contrary, fixes sleeve can be attached to any equipment of base tube 100,208 fulcrum of actuator is given to push towards or push away
Sliding sleeve is to drive sliding sleeve 200.In one embodiment, fixes sleeve 207 can be a group of actuator 208
Part.
Fig. 3 A shows the periphery figure of outer ring 209.As shown in Figure 3B, in one embodiment, outer ring 209, which can be, is formed with
The solid circles bobbin of ring cavity 301.In another embodiment, outer ring 209 can connect to the basic ring 108 of base tube 100.At one
In embodiment, outer ring 209 can be to form cylindric closing solid material.Ring cavity 301 can be formed inside outer ring 209
Space.Ring cavity 301 is large enough to slip over base tube 100.Outer ring 209 can be fixed to base tube 100.In one embodiment, outside
Ring 209 can be used to that sliding sleeve 200 is prevented to move forward during driving.
Fig. 4 A shows valve casing 400.In one embodiment, valve casing 400 can be cylinder material, which may include pressure break
The Part III and production mouth 106 of mouth 105.As shown in Figure 4 B, the Part III of pressure break mouth 105 can be around 400 ring of valve casing
Multiple openings of shape arrangement.In addition, as shown in Figure 4 C, production mouth 106 can be to be opened around the one or more that valve casing 400 is arranged
Mouthful.
Fig. 5 shows the finger valve 500 in close pattern.(wherein fracturing valve 500 can be used for pressing in one embodiment
Split well), fracturing valve 500 may include base tube 100, sliding sleeve 200, outer ring 300 and/or valve casing 400.In such embodiment
In, base tube 100 can be the innermost layer of finger valve 500.The middle layer of circular base tube 100 may include sliding sleeve 200 and consolidate
Surely the outer ring 300 of base tube 100 is arrived, wherein fixes sleeve 207 is fixed to base tube 100.Finger valve 500 may include as outer layer
Valve casing 400.In one embodiment, valve casing 400 may be coupled to basic ring 108, outer ring 209 and fixes sleeve 207.It is pressing
Position is split, pressure break mouth 105 can be aligned and open according to the relative position of base tube 100 and sliding sleeve 200.
In opening state, biasing device 208 may be at load condition, further move hinge and by fingers 101
It is pushed into chamber 107.In such state, fingers 101 may be at closed form, block the path of fluid in chamber 107.Finger-like
Valve 500 can be used for fractured well, for example, as shown in figure 5, in off position, opening is allowed proppant from chamber 107 by pressure break mouth 105
It flows through pressure break mouth 105 and enters stratum, so that pressure break occurs.
Fig. 6 shows the finger valve 500 in opening mode.When biasing device 208 by sliding sleeve 200 towards outer ring 209
When promotion, fingers 101, which can be pushed away to hold up, to be come.When in fractured well in use, sliding sleeve 200 can simultaneously close off pressure break
Mouth 105 and opening production mouth 106, allow material to flow through base tube 100.Once production mouth 106 is opened, so that it may start oil and vapour
Extraction.In one embodiment, multiple finger valves 500 can be placed in a well.When a finger valve is used to press
When splitting well, another can be used in downstream.In such embodiments, each production mouth can have check-valves, thus
Allow the continuous pressure break in downstream without fracturing fluid is pushed through production mouth.
Various changes can occur for the details of operations described above method, without departing from the scope of the following claims.One
A little embodiments are operated in combination with herein as described in independent process.Similarly, one or more of described step
It can be omitted, this depends on the concrete operations environment for realizing this method.It should be understood that the above embodiments are illustrative
, rather than it is restrictive.For example, above-described embodiment can be in combination with one another.Description above, many other implementations are read
Example will be apparent those of skill in the art.Therefore, the scope of the present invention should combine the attached claims,
It is determined together with all equivalents of these claims covering.In the appended claims, " comprising " and " wherein "
Equal terms are used as the pure language equivalent of the corresponding terms such as "comprising" and " wherein ".
Claims (18)
1. a kind of finger valve, which is characterized in that the finger valve includes:
Base tube, the base tube include:
Finger openings；
Multiple fingers；And
One of described fingers are connected to the base tube by multiple hinges, each described hinge；
And
Sliding sleeve, the sliding sleeve include:
First sleeve with inner surface, the inner surface include gap and lower laminate, and the first sleeve is operably positioned at
First position, wherein the multiple fingers are pushed into close stance by the pushing body
It sets, when being in the closed position, the multiple fingers prevent the base
Flowing in pipe；And
The second position, wherein the gap allows around the multiple fingers
The multiple fingers are in an open position, when being in the open position,
The multiple fingers allow the flowing in the base tube.
2. finger valve according to claim 1, which is characterized in that be moved to the second position from the first position
The sliding sleeve slides the base tube.
3. finger valve according to claim 1, which is characterized in that the finger valve further includes multiple first biasing devices,
One of the multiple fingers are biased into open position by each described first biasing device.
4. finger valve according to claim 3, which is characterized in that at least one described biasing device is one of described hinge
Structure member.
5. finger valve according to claim 3, which is characterized in that at least one described biasing device is spring.
6. finger valve according to claim 1, which is characterized in that the gap includes multiple holes, each hole allows institute
It states one of multiple fingers and is moved to the open position.
7. finger valve according to claim 1, which is characterized in that the finger valve further include:
Fixes sleeve, the fixes sleeve is around the base tube fixation and the first side of the neighbouring sliding sleeve；And
The fixes sleeve is connected to the sliding sleeve by actuator, the actuator, and the actuator can be by the cunning
Moving sleeve is moved to the second position from the first position.
8. finger valve according to claim 7, it is characterised in that:
The base tube further includes pressure break mouth first part；
The sliding sleeve further include:
Second sleeve；
Pressure break mouth second part；And
The first sleeve is connected to the second sleeve by one or more arc-like sheets, one or more of arc-like sheets,
In, the space between one or more of arc-like sheets limits the pressure break mouth second part.
9. finger valve according to claim 8, which is characterized in that when the sliding sleeve is located at,
The first position, pressure break mouth first part are aligned with the pressure break mouth second part, and
The second position, pressure break mouth first part are not aligned with the pressure break mouth second part.
10. finger valve according to claim 7, which is characterized in that the base tube further includes production mouth.
11. finger valve according to claim 10, which is characterized in that when the sliding sleeve is located at
The first position, the sliding sleeve block the production mouth；And
The second position, the sliding sleeve do not block the production mouth.
12. finger valve according to claim 9, which is characterized in that the base tube further includes production mouth.
13. finger valve according to claim 12, which is characterized in that when the sliding sleeve is located at
The first position, the sliding sleeve block the production mouth；And
The second position, the sliding sleeve do not block the production mouth.
14. finger valve according to claim 7, which is characterized in that the actuator is the second biasing device.
15. finger valve according to claim 14, which is characterized in that the biasing device is spring.
16. a kind of method that control passes through the flowing of tubing string, which is characterized in that the described method comprises the following steps:
Base tube is connected in tubing string, the base tube includes:
Finger openings；
Multiple fingers；And
One of the multiple fingers are connected to the base tube by multiple hinges, each described hinge；
And
Drive sliding sleeve from first position to the second position, the sliding sleeve includes first sleeve, the first sleeve packet
Including inner surface, the inner surface includes gap and lower laminate, wherein
In the first position, the multiple fingers are pushed into and close by the lower laminate
Position, when being in the closed position, described in the multiple fingers prevention
Flowing in base tube；And
In the second position, the gap surrounds the multiple fingers, permits
Perhaps the multiple fingers are in an open position, when being in the open position,
The multiple fingers allow the flowing in the base tube.
17. according to the method for claim 16, which is characterized in that include the steps that fractured well.
18. according to the method for claim 17, which is characterized in that including the subsequent step from open position production hydrocarbons
Suddenly.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2013/069576 WO2015039696A1 (en) | 2013-09-20 | 2013-09-20 | System and method for controlling flow in a pipe using a finger valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105164365A CN105164365A (en) | 2015-12-16 |
| CN105164365B true CN105164365B (en) | 2019-02-01 |
Family
ID=49230745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380074589.3A Active CN105164365B (en) | 2013-09-20 | 2013-09-20 | The system and method flowed in pipeline are controlled using finger valve |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP2904193B1 (en) |
| CN (1) | CN105164365B (en) |
| AU (1) | AU2013395452B2 (en) |
| BR (1) | BR112015011562B1 (en) |
| CA (1) | CA2886420C (en) |
| EA (1) | EA029960B1 (en) |
| MX (1) | MX2015000915A (en) |
| WO (1) | WO2015039696A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418496A (en) * | 2011-08-17 | 2012-04-18 | 长沙市罡拓能源科技有限公司 | Self-balanced underground full-bore check valve |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768562A (en) * | 1972-05-25 | 1973-10-30 | Halliburton Co | Full opening multiple stage cementing tool and methods of use |
| US6230811B1 (en) * | 1999-01-27 | 2001-05-15 | Halliburton Energy Services, Inc. | Internal pressure operated circulating valve with annulus pressure operated safety mandrel |
| US6244342B1 (en) * | 1999-09-01 | 2001-06-12 | Halliburton Energy Services, Inc. | Reverse-cementing method and apparatus |
| US7240727B2 (en) * | 2004-02-20 | 2007-07-10 | Williams John R | Armored stripper rubber |
| US7237618B2 (en) * | 2004-02-20 | 2007-07-03 | Williams John R | Stripper rubber insert assembly |
| US8714272B2 (en) * | 2009-11-06 | 2014-05-06 | Weatherford/Lamb, Inc. | Cluster opening sleeves for wellbore |
| NO338704B1 (en) * | 2010-02-11 | 2016-10-03 | I Tec As | Ball-actuated device and method for activating a number of such devices |
| CN102383760B (en) * | 2011-07-22 | 2014-04-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Design method of sliding sleeve switch |
| CN202431261U (en) * | 2011-10-03 | 2012-09-12 | 克拉玛依特隆油田技术服务有限责任公司 | Oil field horizontal well multi-section press cracking slide sleeve and opening tool |
| CN202544829U (en) * | 2012-04-24 | 2012-11-21 | 中国石油天然气股份有限公司 | Drivepipe sliding sleeve |
-
2013
- 2013-09-20 AU AU2013395452A patent/AU2013395452B2/en active Active
- 2013-09-20 WO PCT/EP2013/069576 patent/WO2015039696A1/en active Application Filing
- 2013-09-20 EP EP13766028.8A patent/EP2904193B1/en not_active Not-in-force
- 2013-09-20 CN CN201380074589.3A patent/CN105164365B/en active Active
- 2013-09-20 CA CA2886420A patent/CA2886420C/en active Active
- 2013-09-20 EA EA201590096A patent/EA029960B1/en unknown
- 2013-09-20 MX MX2015000915A patent/MX2015000915A/en unknown
- 2013-09-20 BR BR112015011562-4A patent/BR112015011562B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418496A (en) * | 2011-08-17 | 2012-04-18 | 长沙市罡拓能源科技有限公司 | Self-balanced underground full-bore check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015039696A8 (en) | 2015-06-04 |
| BR112015011562A2 (en) | 2017-07-11 |
| EA029960B1 (en) | 2018-06-29 |
| WO2015039696A1 (en) | 2015-03-26 |
| CA2886420A1 (en) | 2015-03-26 |
| MX2015000915A (en) | 2017-11-30 |
| AU2013395452A1 (en) | 2015-04-09 |
| CA2886420C (en) | 2017-03-21 |
| BR112015011562B1 (en) | 2021-08-31 |
| EP2904193A1 (en) | 2015-08-12 |
| EA201590096A1 (en) | 2016-01-29 |
| CN105164365A (en) | 2015-12-16 |
| AU2013395452B2 (en) | 2017-10-12 |
| EP2904193B1 (en) | 2019-01-09 |
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