CN105257268B - A kind of layered polymer injection well matches somebody with somebody poly- device with one heart with bridge-type - Google Patents
A kind of layered polymer injection well matches somebody with somebody poly- device with one heart with bridge-type Download PDFInfo
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- CN105257268B CN105257268B CN201510653923.1A CN201510653923A CN105257268B CN 105257268 B CN105257268 B CN 105257268B CN 201510653923 A CN201510653923 A CN 201510653923A CN 105257268 B CN105257268 B CN 105257268B
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Abstract
The invention discloses a kind of bridge-type to match somebody with somebody poly- device with one heart, and the bridge-type includes with poly- device with one heart：Top connection；Adapter sleeve；Positioning table；Adjusting set；Main body；Pedestal；Lower contact；Throttle core.The advantage of the invention is that：(1) for adjusting set with concentric with poly- device main channel, transmission moment of torsion is big, and it is high that success rate is docked when test is allocated；(2) bridge-type matches somebody with somebody the throttling core ball number continuously adjustabe in poly- device eccentric orfice with one heart, and test allocation data precision significantly improves；(3) with currently advanced survey linkage technique can be adjusted to match, the steel wire compared to routine removes pulling, and labor strength is low, and individual well, which is surveyed, adjusts the cycle short, and operating efficiency is high；(4) passageway bridge is devised in structure, the interlayer interference between each layer can be reduced in test process to greatest extent, test data can more truly reflect stratum actual state；(5) larger chock pressure difference in the case of low viscous damage is ensured, can be realized using fusiformis throttling core in eccentric orfice.
Description
Technical field
The present invention relates to petroleum collection technical field, more particularly to a kind of layered polymer injection well to match somebody with somebody poly- device with one heart with bridge-type.
Background technology
Generally use, can be realized under a water injection pressure system in the layered polymer injection well of each elephant in China with poly- device
The fine injection of each interval polymer, now widely used bias are a kind of eccentric structure, eccentric orfice and interior latus rectum with poly- device
Decentraction, when normally noting poly-, the poly- amount of note of throttling each interval of fuse adjustment control in eccentric orfice is changed by wire Launching and Bailing,
It is low to dock success rate, cycle length is adjusted in individual well survey, and labor intensity is big, and test allocation data precision is not high, and tests interlayer when allocating
Interfere, influenceing other intervals, normally note is poly-.
Therefore, it is of the prior art it is eccentric with poly- device have that docking success rate is low, test period is long, labor intensity is big and
Influence the poly- technical problem of the normal note of other intervals.
The content of the invention
The embodiment of the present invention matches somebody with somebody poly- device with one heart by providing a kind of layered polymer injection well bridge-type, and the bias to solve is matched somebody with somebody poly-
The existing docking success rate of device is low, test period is long, labor intensity is big and influences the technology that the normal notes of other intervals gathers asks
Topic.
The embodiments of the invention provide a kind of bridge-type to match somebody with somebody poly- device with one heart, including：
Top connection；
Adapter sleeve, it is connected with the top connection；
Positioning table, it is arranged in the adapter sleeve and is compressed by the top connection, the positioning table and the top connection
Close one end is provided with locating slot and bypass groove, and the annular space that the positioning table is formed with the adapter sleeve is side channel；
Adjusting set, it is arranged in the positioning table and is connected with the positioning table, close to connecing on described in the adjusting set
One end of head is provided with the first sealing ring, is provided with neck in the circumference of the adjusting set, the neck it is close it is described on connect
One end of head is provided with the first back-out groove, and one end of the remote top connection of the neck is provided with the second back-out groove；
Main body, it is connected with the adapter sleeve, is provided with the second sealing in the main body close on one end of the adapter sleeve
Circle, the main body have concentric main channel, eccentric orfice and passageway bridge, and it is convex to be provided with support on the inwall of the concentric main channel
Platform and lateral lead channel, are provided with fluid hole at the cecum of the eccentric orfice, first sealing ring, the adjusting set outer wall,
The space that the inwall of the positioning table and second sealing ring are formed is chamber, and the chamber is used to house seal grease；
Pedestal, it is arranged at the described one end of main channel away from the adapter sleeve with one heart；
Lower contact, it is connected with the main body, and the pedestal is pressed on the main channel with one heart away from the adapter sleeve
One end；
Throttle core, is arranged in the eccentric orfice.
Alternatively, the adapter sleeve is connected by the first internal thread with the first external screw thread of the top connection.
Alternatively, the adjusting set is connected by the second external screw thread with the second internal thread of the positioning table.
Alternatively, the main body is connected by the 3rd external screw thread with the 3rd internal thread of the adapter sleeve.
Alternatively, the lower contact is connected by the 4th internal thread with the 4th external screw thread of the main body.
Alternatively, one end away from the top connection is provided with the 3rd sealing ring, the 3rd sealing in the adjusting set
Enclose the sealing for ensureing the adjusting set and the main channel with one heart.
Alternatively, the throttling core is fusiformis throttling core.
One or more embodiment in the embodiment of the present invention, at least has the following technical effect that or advantage：
(1) for adjusting set with concentric with poly- device main channel, transmission moment of torsion is big, and it is high that success rate is docked when test is allocated；
(2) bridge-type matches somebody with somebody the throttling core ball number continuously adjustabe in poly- device eccentric orfice with one heart, and test allocation data precision significantly carries
It is high；
(3) with currently advanced survey linkage technique can be adjusted to match, the steel wire compared to routine removes pulling, worker's work
Low intensity, individual well, which is surveyed, adjusts the cycle short, and operating efficiency is high；
(4) passageway bridge is devised in structure, the interlayer that can reduce to greatest extent between each layer in test process is done
Disturb, test data can more truly reflect stratum actual state；
(5) larger chock pressure difference in the case of low viscous damage is ensured, can be realized using fusiformis throttling core in eccentric orfice.
Brief description of the drawings
Fig. 1 is the structural representation that bridge-type of the present invention matches somebody with somebody poly- device with one heart；
Fig. 2 is that bridge-type shown in Fig. 1 matches somebody with somebody sectional view of the poly- device along line A-A with one heart；
Fig. 3 is that bridge-type shown in Fig. 1 matches somebody with somebody sectional view of the poly- device along line B-B with one heart.
Embodiment
The embodiment of the present invention matches somebody with somebody poly- device with one heart by providing a kind of layered polymer injection well bridge-type, and the bias to solve is matched somebody with somebody poly-
The existing docking success rate of device is low, test period is long, labor intensity is big and influences the technology that the normal notes of other intervals gathers asks
Topic.
The embodiments of the invention provide a kind of bridge-type to match somebody with somebody poly- device with one heart, including：
Top connection；
Adapter sleeve, it is connected with top connection；
Positioning table, it is arranged in adapter sleeve and is compressed by top connection, positioning table one end close with top connection is provided with
Locating slot and bypass groove, the annular space that positioning table is formed with adapter sleeve is side channel；
Adjusting set, it is arranged in positioning table and is connected with positioning table, one end of top connection is provided with the in adjusting set
One sealing ring, neck is provided with the circumference of adjusting set, one end close to top connection of neck is provided with the first back-out groove, neck
One end of remote top connection be provided with the second back-out groove；
Main body, it is connected with adapter sleeve, is provided with the second sealing ring in main body close on one end of adapter sleeve, main body has same
Heart main channel, eccentric orfice and passageway bridge, support rim and lateral lead channel, eccentric orfice are provided with the inwall of concentric main channel
Cecum at be provided with fluid hole, the space that the first sealing ring, the outer wall of adjusting set, the inwall of positioning table and the second sealing ring are formed
For chamber, chamber is used to house seal grease；
Pedestal, it is arranged at the one end of concentric main channel away from adapter sleeve；
Lower contact, it is connected with main body, and pedestal is pressed on the one end of concentric main channel away from adapter sleeve；
Throttle core, is arranged in eccentric orfice.
In specific implementation process, adapter sleeve is connected by the first internal thread with the first external screw thread of top connection.
In specific implementation process, adjusting set is connected by the second external screw thread with the second internal thread of positioning table.
In specific implementation process, main body is connected by the 3rd external screw thread with the 3rd internal thread of adapter sleeve.
In specific implementation process, lower contact is connected by the 4th internal thread with the 4th external screw thread of main body.
In specific implementation process, one end away from top connection is provided with the 3rd sealing ring, the 3rd sealing ring in adjusting set
For ensureing the sealing of adjusting set and concentric main channel.
In specific implementation process, throttling core is fusiformis throttling core.
The advantage of the invention is that：(1) adjusting set with poly- device main channel it is concentric, transmit moment of torsion it is big, test allotment when pair
It is connected into power height；(2) bridge-type matches somebody with somebody the throttling core ball number continuously adjustabe in poly- device eccentric orfice with one heart, and test allocation data precision is notable
Improve；(3) with currently advanced survey linkage technique can be adjusted to match, the steel wire compared to routine removes pulling, and worker's work is strong
Spend low, individual well, which is surveyed, adjusts the cycle short, and operating efficiency is high；(4) passageway bridge is devised in structure, can be to greatest extent in test process
Ground reduces the interlayer interference between each layer, and test data can more truly reflect stratum actual state；(5) shuttle is used in eccentric orfice
Shape throttling core, in the case of low viscous damage is ensured, can realize larger chock pressure difference.
, will be with reference to accompanying drawing 1-3, to illustrate above-mentioned technical proposal in ensuing part.
Fig. 1-3 is refer to, Fig. 1 is the structural representation that bridge-type of the present invention matches somebody with somebody poly- device with one heart；Fig. 2 is that bridge-type shown in Fig. 1 is same
The heart matches somebody with somebody sectional view of the poly- device along line A-A；Fig. 3 is that bridge-type shown in Fig. 1 matches somebody with somebody sectional view of the poly- device along line B-B with one heart.
As Figure 1-3, bridge-type of the present invention is with one heart with poly- device mainly by top connection 1, locating slot 2, positioning table 3, adapter sleeve
4th, sealing ring 5, adjusting set 6, side channel 7, sealing ring 8, main body 9, sealing ring 10, pedestal 11, lower contact 12, sealing ring 13, throttling
Core 14, eccentric orfice 15, screw out groove 16, external screw thread 17, neck 18, internal thread 19, chamber 20, screw out groove 21, bypass groove 22, go out liquid
Hole 23, passageway bridge 24, lateral lead channel 25, support rim 26, main channel 27 form.
The upper end circumference interaction arrangement of positioning table 3 with poly- device has four locating slots 2 and four bypass grooves 22 to bridge-type with one heart, fixed
The position lower end of platform 3 is embedded in the upper end of main body 9, and the upper end of positioning table 3 is compressed by the top connection 1 of screw-in, and top connection 1 passes through external screw thread
It is connected with the internal thread of adapter sleeve 4, the annular space that adapter sleeve 4 and positioning table 3 are formed is side channel 7；Main body 9 is provided with concentric master
Passage 27, eccentric orfice 15 and passageway bridge 24, three support rims 26, lateral lead channel 25 are provided with the inwall of main channel 27,
Fluid hole 23 is provided with the cecum of eccentric orfice 15, pedestal 11 is embedded in the lower end of the concentric main channel 27 of main body 9, by under screw-in
Joint 12 compresses positioning table 3, and the lower end external screw thread of main body 9 connects with the internal thread of lower contact 12, the upper external screw thread of main body 9 and adapter sleeve
4 internal threads connect；The inner circumferential of adjusting set 6 is disposed with neck 18, and the upper end of neck 18, which has, screws out groove 21, and there is back-out groove the lower end of neck 18
16, adjusting set 6 is connected by external screw thread 17 with the internal thread 19 on the inwall of positioning table 3, the external screw thread 17 of adjusting set 6, positioning table 3
The confined space that the sealing ring 5 of internal thread 19 and sealing ring 8 form is chamber 20.
Please continue to refer to Fig. 1-Fig. 3, before bridge-type is gone into the well with poly- device with one heart, throttling core 14 it is preset enter main body 9 eccentric orfice 15
In, and realize that throttling core 14 seals with eccentric orfice 15 by sealing ring 13, by the pedestal 11 that is embedded in the bottom of main body 9 to throttling
The axial direction of core 14 carries out spacing；The chamber that the external screw thread 17 of adjusting set 6, the sealing ring 5 of 3 internal thread of positioning table 19 and sealing ring 8 form
HTHP stop-leak compound is full of in 20；Adjusting set 6 is adjusted to lower position (i.e. shown position) by measurement and adjustment instrument device, passes through regulation
The sealing ring 10 for covering 6 lower ends realizes being fully sealed for the main channel 27 concentric with main body 9 of adjusting set 6, to ensure that packer suppresses seat
Setting pressure during envelope；After completion, note in poly- tubing string by cable tripping in measurement and adjustment instrument device, made by ground signal in measurement and adjustment instrument device
Locating detent open, and with the upper end of positioning table 3 arrangement locating slot 2 accurately dock, to realize the regulating valve of measurement and adjustment instrument device lower end
Accurately docked with the neck on the inwall of adjusting set 6, after the completion of docking, make the regulating valve of measurement and adjustment instrument device lower end anti-by ground signal
To rotation, adjusting set 6 is driven to rotate, the interaction of the internal thread 19 in external screw thread 17 and positioning table 3 in adjusting set 6
Under, adjusting set 6 is moved up under the support of support rim 26, and lateral lead channel 25 is gradually opened, and polymer solution passes through master
Passage 27, lateral lead channel 25 are entered in the circular passage that throttling core 14 and eccentric orfice 15 form, and are entered by fluid hole 23
Enter to note poly layer section, realize by the consecutive variations for the ball number of core 14 that throttled in eccentric orfice 15 to fine-tune each interval of control with poly-
Amount, while another part polymer solution enters bridge-type by bypassing groove 22, side channel 7, passageway bridge 24, pedestal 11 and matched somebody with somebody with one heart
In the oil pipe of poly- device bottom, when adjusting set 6 is moved upwards up to extreme position, lateral lead channel 25 is opened completely, measurement and adjustment instrument device lower end
Regulating valve overlapped with the back-out groove 21 in adjusting set 6, regulating valve is from screwing out in groove 21 during reverse rotation, and adjusting set 6 is not
Invert again；When ground signal rotates forward the regulating valve of measurement and adjustment instrument device lower end, in the phase interaction of external screw thread 17 and internal thread 19
Under, adjusting set 6 moves down under the support of support rim 26, and lateral lead channel 25 tapers into, and adjusting set 6 moves down
During to extreme position, the main channel 27 concentric with main body 9 of sealing ring 10 of the lower end of adjusting set 6 is fully sealed, lateral lead channel 25
Completely close, the regulating valve of measurement and adjustment instrument device lower end overlaps with the back-out groove 16 in adjusting set 6, and regulating valve is from back-out when rotating forward
Deviate from groove 21, adjusting set 6 no longer rotates forward；When adjusting set 6 moves up and down under the interaction of external screw thread 17 and internal thread 19,
The HTHP stop-leak compound of filling is constantly replaced up and down in chamber 20, avoids polymer solution or impurity enters chamber 20
In.
In ensuing part, the bridge-type provided in an embodiment of the present invention workflow with poly- device with one heart will be introduced.
The first step, before bridge-type is gone into the well with poly- device with one heart, various outer diameter and ball are preferably gone out with poly- amount according to each note poly layer section
Several throttling cores 14, and insert in advance in eccentric orfice 15, and realize that throttling core 14 seals with eccentric orfice 15 by sealing ring 13, pass through
In the bottom of main body 9, the pedestal 11 of insertion is carried out spacing to the axial direction for the core 14 that throttles；
Second step, adjusting set 6 is adjusted to by lower position (i.e. shown position) by measurement and adjustment instrument device, the lower end of adjusting set 6
Sealing ring 10 realizes being fully sealed for the main channel 27 concentric with main body 9 of adjusting set 6, to ensure that it is setting when setting that packer is suppressed
Pressure；
3rd step, tripping in are assembled with the layered polymer injection process pipe string that bridge-type matches somebody with somebody poly- device with one heart, out of oil pipe water filling suppress, it is real
Supporting packer is completely setting in existing process pipe string；
4th step, after completion, with cable in layered polymer injection process pipe string tripping in measurement and adjustment instrument device, survey is made by ground signal
Locating detent in demodulating apparatus opens, and is accurately docked with the locating slot 2 of the upper end of positioning table 3 arrangement, to realize measurement and adjustment instrument device lower end
Regulating valve is accurately docked with the neck on the inwall of adjusting set 6；
5th step, after the completion of docking, the regulating valve for making measurement and adjustment instrument device lower end by ground signal reversely rotates, and drives regulation
Set 6 rotates, and under the interaction of the internal thread 19 in external screw thread 17 and positioning table 3 in adjusting set 6, adjusting set 6 is supporting
Moved up under the support of boss 26, lateral lead channel 25 is gradually opened, and polymer solution passes through main channel 27, lateral lead channel
25 enter in the circular passage that throttling core 14 and eccentric orfice 15 form, and enter note poly layer sections at different levels by fluid hole 23, real
Show by the consecutive variations for the ball number of core 14 that throttled in eccentric orfice 15 come adjustment control with poly- amount, while another part polymer is molten
Liquid enters bridge-type with one heart with the oil pipe of poly- device bottom by bypassing groove 22, side channel 7, passageway bridge 24, pedestal 11, so tests
Just not influenceing other intervals during allotment, normally note is poly-, avoids interlayer and interferes；
6th step, when adjusting set 6 is moved upwards up to extreme position, lateral lead channel 25 is opened completely, is reached most with poly- amount
Greatly, the regulating valve of measurement and adjustment instrument device lower end overlaps with the back-out groove 21 in adjusting set 6, and regulating valve is from screwing out in groove 21 during reverse rotation
Abjection, adjusting set 6 no longer inverts, so as to protect external screw thread 17 and internal thread 19 without damage；
When 7th step, ground signal rotate forward the regulating valve of measurement and adjustment instrument device lower end, in external screw thread 17 and internal thread 19
Interaction under, adjusting set 6 moves down under the support of support rim 26, and lateral lead channel 25 tapers into, so poly-
The ball number for the throttling core 14 that polymer solution flows through becomes more, and interval is reduced with poly- amount；
8th step, when adjusting set 6 is moved down into extreme position, the sealing ring 10 of the lower end of adjusting set 6 with main body 9 is concentric leads
Passage 27 is fully sealed, and lateral lead channel 25 completely closes, regulating valve and the back-out groove in adjusting set 6 of measurement and adjustment instrument device lower end
16 overlap, and from screwing out in groove 21, adjusting set 6 no longer rotates forward regulating valve when rotating forward.
One or more embodiment in the embodiment of the present invention, at least has the following technical effect that or advantage：
(1) for adjusting set with concentric with poly- device main channel, transmission moment of torsion is big, and it is high that success rate is docked when test is allocated；
(2) bridge-type matches somebody with somebody the throttling core ball number continuously adjustabe in poly- device eccentric orfice with one heart, and test allocation data precision significantly carries
It is high；
(3) with currently advanced survey linkage technique can be adjusted to match, the steel wire compared to routine removes pulling, worker's work
Low intensity, individual well, which is surveyed, adjusts the cycle short, and operating efficiency is high；
(4) passageway bridge is devised in structure, the interlayer that can reduce to greatest extent between each layer in test process is done
Disturb, test data can more truly reflect stratum actual state；
(5) larger chock pressure difference in the case of low viscous damage is ensured, can be realized using fusiformis throttling core in eccentric orfice.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (6)
1. a kind of bridge-type matches somebody with somebody poly- device with one heart, it is characterised in that including：
Top connection；
Adapter sleeve, it is connected with the top connection；
Positioning table, it is arranged in the adapter sleeve and is compressed by the top connection, the positioning table approaches with the top connection
One end be provided with locating slot and bypass groove, the annular space that the positioning table and the adapter sleeve are formed is side channel；
Adjusting set, it is arranged in the positioning table and is connected with the positioning table, close to the top connection in the adjusting set
One end is provided with the first sealing ring, and neck is provided with the circumference of the adjusting set, the close top connection of the neck
One end is provided with the first back-out groove, and one end of the remote top connection of the neck is provided with the second back-out groove；
Main body, it is connected with the adapter sleeve, is provided with the second sealing ring, institute in the main body close on one end of the adapter sleeve
Stating main body has concentric main channel, eccentric orfice and a passageway bridge, it is described be provided with one heart on the inwall of main channel support rim and
Lateral lead channel, is provided with fluid hole at the cecum of the eccentric orfice, first sealing ring, the outer wall, described of the adjusting set
The space that the inwall of positioning table and second sealing ring are formed is chamber, and the chamber is used to house seal grease；
Pedestal, it is arranged at the described one end of main channel away from the adapter sleeve with one heart；
Lower contact, it is connected with the main body, and the pedestal is pressed on one of the main channel with one heart away from the adapter sleeve
End；
Throttle core, is arranged in the eccentric orfice, and the throttling core is fusiformis throttling core.
2. bridge-type as claimed in claim 1 matches somebody with somebody poly- device with one heart, it is characterised in that the adapter sleeve passes through the first internal thread and institute
The first external screw thread for stating top connection is connected.
3. bridge-type as claimed in claim 1 matches somebody with somebody poly- device with one heart, it is characterised in that the adjusting set passes through the second external screw thread and institute
The second internal thread for stating positioning table is connected.
4. bridge-type as claimed in claim 1 matches somebody with somebody poly- device with one heart, it is characterised in that the main body by the 3rd external screw thread with it is described
3rd internal thread of adapter sleeve is connected.
5. bridge-type as claimed in claim 1 matches somebody with somebody poly- device with one heart, it is characterised in that the lower contact passes through the 4th internal thread and institute
The 4th external screw thread for stating main body is connected.
6. bridge-type as claimed in claim 1 matches somebody with somebody poly- device with one heart, it is characterised in that away from the top connection in the adjusting set
One end is provided with the 3rd sealing ring, and the 3rd sealing ring is used for the sealing for ensureing the adjusting set and the main channel with one heart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510653923.1A CN105257268B (en) | 2015-10-10 | 2015-10-10 | A kind of layered polymer injection well matches somebody with somebody poly- device with one heart with bridge-type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510653923.1A CN105257268B (en) | 2015-10-10 | 2015-10-10 | A kind of layered polymer injection well matches somebody with somebody poly- device with one heart with bridge-type |
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| CN105257268A CN105257268A (en) | 2016-01-20 |
| CN105257268B true CN105257268B (en) | 2018-03-09 |
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| CN201510653923.1A Active CN105257268B (en) | 2015-10-10 | 2015-10-10 | A kind of layered polymer injection well matches somebody with somebody poly- device with one heart with bridge-type |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106837275B (en) * | 2017-01-13 | 2019-06-18 | 中国海洋石油集团有限公司 | A kind of large-discharge single pipe layered polymer injection tunable arrangement |
| CN109339748B (en) * | 2018-09-11 | 2020-12-29 | 中国海洋石油集团有限公司 | Water accumulation separate injection device suitable for offshore oil field |
| CN112647911B (en) * | 2020-12-28 | 2022-08-02 | 中国海洋石油集团有限公司 | Chemical flooding multi-medium bridge type channel injection allocation device |
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| CN102536181A (en) * | 2012-02-10 | 2012-07-04 | 哈尔滨工业大学 | Adjustable eccentric injection allocation device for polymer injection well |
| CN103104231A (en) * | 2013-01-31 | 2013-05-15 | 中国石油天然气股份有限公司 | Bridge type concentric continuous adjustable water distributor |
| CN103628847A (en) * | 2012-08-28 | 2014-03-12 | 中国石油天然气股份有限公司 | Bridge type integrated concentric water distributor |
| CN204212755U (en) * | 2014-10-31 | 2015-03-18 | 中国石油天然气股份有限公司 | Integral type concentric roater regulator |
| CN104963665A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Bridge type concentric profile control water distribution device |
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| US6557640B1 (en) * | 1998-12-07 | 2003-05-06 | Shell Oil Company | Lubrication and self-cleaning system for expansion mandrel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536181A (en) * | 2012-02-10 | 2012-07-04 | 哈尔滨工业大学 | Adjustable eccentric injection allocation device for polymer injection well |
| CN103628847A (en) * | 2012-08-28 | 2014-03-12 | 中国石油天然气股份有限公司 | Bridge type integrated concentric water distributor |
| CN103104231A (en) * | 2013-01-31 | 2013-05-15 | 中国石油天然气股份有限公司 | Bridge type concentric continuous adjustable water distributor |
| CN204212755U (en) * | 2014-10-31 | 2015-03-18 | 中国石油天然气股份有限公司 | Integral type concentric roater regulator |
| CN104963665A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Bridge type concentric profile control water distribution device |
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