CN109958414A - A kind of double channel stabilized flow control water regulator - Google Patents
A kind of double channel stabilized flow control water regulator Download PDFInfo
- Publication number
- CN109958414A CN109958414A CN201910262653.XA CN201910262653A CN109958414A CN 109958414 A CN109958414 A CN 109958414A CN 201910262653 A CN201910262653 A CN 201910262653A CN 109958414 A CN109958414 A CN 109958414A
- Authority
- CN
- China
- Prior art keywords
- valve
- regulating valve
- water
- chamber
- flow control
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 230000001105 regulatory effect Effects 0.000 claims abstract description 96
- 238000007789 sealing Methods 0.000 claims description 30
- 238000004073 vulcanization Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 abstract description 18
- 239000007924 injection Substances 0.000 abstract description 18
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 238000011049 filling Methods 0.000 description 15
- 108091006146 Channels Proteins 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 102000010637 Aquaporins Human genes 0.000 description 2
- 108010063290 Aquaporins Proteins 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The invention discloses a kind of double channel stabilized flow control water regulators, including main valve body, the first regulating valve and the second regulating valve, the first regulating valve accommodating chamber and the second regulating valve accommodating chamber positioned opposite are offered on main valve body, the first regulating valve and the second regulating valve, which respectively correspond, to be arranged in the first regulating valve accommodating chamber and the second regulating valve accommodating chamber；Intake tunnel, exhalant canal one and exhalant canal two are opened up on main valve body, the first regulating valve and the second regulating valve are connected to the water outlet of intake tunnel；First regulating valve is connected to the water inlet end of exhalant canal one, and the second regulating valve is connected to the water inlet end of exhalant canal two.Double channel stabilized flow control water regulator provided by the invention realizes the flushing to water injection well by the control to the first control valve and the second control valve, and the function that huge discharge is filled the water and finely filled the water keeps the water for injecting water injection well more scientific, reasonable.
Description
Technical field
The present invention relates to oil extraction in oil field technical field, more particularly to a kind of double channel stabilized flow control water regulator.
Background technique
In oilfield development process, fine water filling is to guarantee the important means of oil field long term stable production, and to realize it, is filled the water
The selection of gate is one of key means.The regulating gate that existing water injection well in oil fields uses is various in style, and most water control is not
It is enough to stablize, often there is springboard, shrink, stop phenomena such as note, seriously affects the normal water filling in oil field.
Therefore it provides a kind of double channel stabilized flow control water regulator, so that the water injection rate of water injection well controls more reasonable, reality
Now fine water filling, is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
In view of this, the present invention provides a kind of double channel stabilized flow control water regulator, to solve existing Water filling valve water
Unstable technical problem is controlled, the water injection rate of more scientific control water injection well is reached.
The present invention adopts the following technical scheme:
A kind of double channel stabilized flow control water regulator, which is characterized in that adjusted including main valve body, the first regulating valve and second
Valve, offers the first regulating valve accommodating chamber and the second regulating valve accommodating chamber positioned opposite in main valve body, the first regulating valve and the
Two regulating valves, which respectively correspond, is mounted on the first regulating valve accommodating chamber and the second regulating valve accommodating chamber；It is opened up on main valve body logical into water
Road, exhalant canal one and exhalant canal two, the first regulating valve and the second regulating valve is salable or connection and the water outlet of intake tunnel
End；First regulating valve is connected to the water inlet end of exhalant canal one, and the second regulating valve is connected to the water inlet end of exhalant canal two.
It can be seen via above technical scheme that compared with prior art, the present invention discloses a kind of binary channels current stabilization of offer
Water regulator is controlled, when carrying out water injection well flushing, opens the first regulating valve, water enters the first regulating valve by going out by intake tunnel
Aquaporin one flows out, and completes the function of rinsing water injection well；When finely being filled the water, the first regulating valve is closed, and is opened second and is adjusted
Valve makes water enter the second regulating valve by intake tunnel and is flowed out by exhalant canal two, completed to water filling by adjusting the second regulating valve
The fine water filling of well；When largely being filled the water, the first regulating valve is opened, and a part of water is flowed out by exhalant canal one, another part
Water is controlled by the second control regulation valve, is flowed out by exhalant canal two, and the fine water filling to water injection well is completed.
Further, the first regulating valve includes valve body one, valve rod one and valve seat one, in valve body one and the first regulating valve accommodating chamber
Wall is fixed and has inlet opening one thereon；Valve seat one and valve body one are fixed and are located at the first regulating valve accommodating chamber and the second regulating valve
Accommodating chamber one end close to each other.
Wherein, with the threaded hole one inside chamber one and connecting chamber one and valve body one in valve body one, inlet opening one connects
Logical intake tunnel and chamber one；One end of valve rod one passes through threaded hole one and chamber one, and offsets or separated with close with valve seat one
Envelope opens inlet opening one, and valve rod one is threadedly coupled with one corresponding position of threaded hole.
Using having the beneficial effect that for above-mentioned further scheme, water is by intake tunnel by the first regulating valve by exhalant canal one
Outflow realizes the function of well-flushing and huge discharge water filling, and valve rod one can offset or separate with valve seat one, realize valve rod one and
Sealing function between valve seat one.
Further, fixed seal ring one on valve seat one, valve rod one can offset or separate with sealing ring one, to seal or open
Intake tunnel and the blocking of chamber one are connected to.
Further, the vulcanization of sealing ring one is on valve seat one.
Using having the beneficial effect that for above-mentioned further scheme, realizes and reach better seal when closing the first regulating valve
Effect, and because water flow impact pressure is big in water filling, by sealing ring vulcanization on valve seat, it ensure that sealing ring will not be by water flow
It washes away, further ensures sealing effect.
Further, the second regulating valve includes valve body two, valve rod two and valve seat two, in valve body two and the second regulating valve accommodating chamber
Wall is fixed and has inlet opening two thereon；Valve seat two and valve body two are fixed and are located at the first regulating valve accommodating chamber and the second regulating valve
Accommodating chamber one end close to each other.
With the threaded hole two inside chamber two and connecting chamber two and valve body two, the connection water inlet of inlet opening two in valve body two
Channel and chamber two；Two one end of valve rod passes through threaded hole two and chamber two, and offsets or separate to seal or open with valve seat two
Inlet opening two, and valve rod two is threadedly coupled with two corresponding position of threaded hole.
Using having the beneficial effect that for above-mentioned further scheme, water is by intake tunnel by the second regulating valve by exhalant canal two
Outflow, realizes the function of finely filling the water to water injection well.
Further, fixed seal ring two on valve seat two, valve rod two can be offseted or be separated with sealing ring two to seal or open
Intake tunnel and chamber two.
Further, sealing ring curing is on valve seat two.
Using having the beneficial effect that for above-mentioned further scheme, it is ensured that sealing effect when the second regulating valve is closed, and because
For in water filling, water flow impact pressure is big, by sealing ring vulcanization on valve seat, it ensure that sealing ring will not be washed away by water flow, into one
Step ensures sealing effect.
Further, adjusting rod is connected on valve rod two.
Using having the beneficial effect that for above-mentioned further scheme, adjusting rod facilitates the adjusting to the second regulating valve, effectively controls
The water of system injection water injection well.
Further, the material of valve rod one, valve seat one, valve rod two and valve seat two is 3Cr13.
Using having the beneficial effect that for above-mentioned further scheme, there is stronger corrosion resistance and wearability, increase and use the longevity
Life.
Further, the diameter of exhalant canal one is greater than the diameter of exhalant canal two.
Using having the beneficial effect that for above-mentioned further scheme, can more reasonably complete to the first of water injection well the water filling and the
The requirement of two water fillings.
Further, further include water inlet pipe and outlet pipe, water inlet pipe is connected to the water inlet end of intake tunnel, outlet pipe and go out
The water outlet of aquaporin one is connected to the water outlet of exhalant canal two.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawing is a kind of double channel stabilized flow control water regulator structural schematic diagram provided by the invention；
Fig. 2 attached drawing is pipelined channel schematic diagram provided by the invention；
In figure:
1- water inlet pipe, 2- outlet pipe, 3- main valve body, the first regulating valve of 31-, 310- valve body one, 311- valve rod one, 312- valve
One, 313- of seat chamber one, 314- sealing ring one, the inlet opening 315- one, the second regulating valve of 32-, 320- valve body two, 321- valve rod
Two, 322- valve seat two, 323- chamber two, 324- sealing ring two, the inlet opening 325- two, 33- intake tunnel, 34- exhalant canal one,
35- exhalant canal two, 4- adjusting rod.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of double channel stabilized flow control water regulator disclosed by the invention, in conjunction with shown in attached drawing 1, the double channel stabilized flow control water tune
Saving device includes main valve body 3, the first regulating valve 31 and the second regulating valve 32, offers the first regulating valve positioned opposite in main valve body
Accommodating chamber and the second regulating valve accommodating chamber, the first regulating valve 31 and the second regulating valve 32, which respectively correspond, is mounted on the first regulating valve appearance
Receive chamber and the second regulating valve accommodating chamber；Intake tunnel 33, exhalant canal 1 and exhalant canal 2 35 are opened up on main valve body 3, the
One regulating valve 31 and the second regulating valve 32 is salable or connection and the water outlet of intake tunnel 33；First regulating valve 31 and water outlet are logical
The water inlet end in road 1 is connected to, and the second regulating valve 32 is connected to the water inlet end of exhalant canal 2 35.
Preferably, the first regulating valve 31 includes valve body 1, valve rod 1 and valve seat 1, valve body 1 and first
Regulating valve accommodates cavity wall and fixes and have inlet opening 1 thereon；Valve seat 1 and valve body 1 are fixed and are located at first
Regulating valve accommodating chamber and the second regulating valve accommodating chamber one end close to each other.
Wherein, there is the threaded hole one inside chamber 1 and connecting chamber 1 and valve body one in valve body 1, into
Water hole 1 is connected to intake tunnel 33 and chamber 1；One end of valve rod 1 passes through threaded hole one and chamber 1 and valve
Seat 1 is offseted or is separated to seal or open inlet opening 1, and valve rod 1 and one corresponding position screw thread of threaded hole connect
It connects.
Preferably, fixed seal ring 1 on valve seat 1, valve rod 1 can offset or separate with sealing ring 1,
To seal or open intake tunnel 33 and chamber 1.
More preferably, the vulcanization of sealing ring 1 is on valve seat 1.
Preferably, the second regulating valve 32 includes valve body 2 320, valve rod 2 321 and valve seat 2 322, valve body 2 320 and second
Regulating valve accommodates cavity wall and fixes and have inlet opening 2 325 thereon；Valve seat 2 322 and valve body 2 320 are fixed and are located at first
Regulating valve accommodating chamber and the second regulating valve accommodating chamber one end close to each other.
With the threaded hole two inside chamber 2 323 and connecting chamber 2 323 and valve body two, inlet opening in valve body 2 320
2 325 connection intake tunnels 33 and chamber 2 323；2 311 one end of valve rod passes through threaded hole two and chamber 2 313 and valve seat two
322 offset or separate to seal or open inlet opening 2 325, and valve rod 2 321 is threadedly coupled with two corresponding position of threaded hole.
Preferably, fixed seal ring 2 324 on valve seat 2 322, valve rod 2 321 can offset or separate with sealing ring 2 324,
To seal or open intake tunnel 33 and chamber 2 323.
More preferably, the vulcanization of sealing ring 2 324 is on valve seat 2 322.
Preferably, adjusting rod 4 is connected on valve rod 2 321.
Preferably, the material of valve rod one, valve seat one, valve rod two and valve seat two is 3Cr13.
3Cr13 has stronger corrosion resistance and wearability, ensure that the service life of double channel stabilized flow control water regulator.
Preferably, the diameter of exhalant canal one is greater than the diameter of exhalant canal two.
Exhalant canal one is connected to the first regulating valve, is designed into the pipeline of major diameter, meets the flow need of mass-flow
It asks, ensure that can quickly finish water filling；Exhalant canal two is connected to the second regulating valve, is designed into the pipe of minor diameter
Road matches with small water, meets the needs of finely filling the water.
It based on the above embodiment, further include water inlet pipe 1 and outlet pipe 2, the water inlet end company of water inlet pipe 1 and intake tunnel 33
Logical, outlet pipe 2 is connected to the water outlet of the water outlet of exhalant canal 1 and exhalant canal 2 35.
The water inlet pipe 1 and outlet pipe 2 of double channel stabilized flow control water regulator are mounted on the well of water injection well by welding
Mouthful, the first regulating valve 31 is opened after being installed, water enters chamber 1 by being discharged by intake tunnel 33 by water inlet pipe 1
Welding slag is discharged in channel 1；In use, the first regulating valve and the second regulating valve are opened, one when as needed a large amount of water fillings
Water is divided to flow out by exhalant canal 1, another part water adjusts the second regulating valve 32 by exhalant canal 2 35 by adjusting rod 4
A large amount of water fillings to water injection well are completed in outflow；When such as needing finely to fill the water, the first regulating valve 31 is closed, by the second regulating valve 32
It opens, adjusts the second regulating valve 32 with adjusting rod 4 to control water injection rate, water is flowed out by exhalant canal 2 35, is completed to water injection well
Fine water filling.
Preferably, between valve rod 1 and valve seat 1 by the way of dual-seal, i.e. the one of one 311 lower end of valve rod
Part fits closely the effect for realizing sealing, on the other hand, another part and sulphur of the lower end of valve rod 1 with valve seat 1
The sealing ring 1 changed on valve seat 1 fits closely, when closing the first regulating valve 31, valve rod 1 and sealing ring one
314 interference seals, another realizes the effect of sealing, has the function that double containment.
Equally, between valve rod 2 321 and valve seat 2 322 also by the way of dual-seal, that is, valve rod 2 321 and valve seat
2 322 fit closely the effect for realizing sealing, on the other hand, the sealing ring of 2 321 lower end of valve rod and vulcanization on valve seat 2 322
2 324 fit closely, and when closing the second regulating valve 32, valve rod 2 321 and 2 324 interference seal of sealing ring are realized again
The effect of sealing, has the function that double containment.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of double channel stabilized flow control water regulator, which is characterized in that including main valve body (3), the first regulating valve (31) and second
Regulating valve (32) offers the first regulating valve accommodating chamber and the second regulating valve accommodating chamber positioned opposite, institute in the main valve body
It states the first regulating valve (31) and is respectively corresponded with second regulating valve (32) and be mounted on the first regulating valve accommodating chamber and described
Second regulating valve accommodating chamber；Intake tunnel (33), exhalant canal one (34) and exhalant canal two are opened up on the main valve body (3)
(35), first regulating valve (31) and second regulating valve (32) it is salable or connection with the intake tunnel (33) go out
Water end (W.E.)；First regulating valve (31) is connected to the water inlet end of the exhalant canal one (34), second regulating valve (32) with
The water inlet end of the exhalant canal two (35) is connected to.
2. a kind of double channel stabilized flow control water regulator according to claim 1, which is characterized in that first regulating valve
It (31) include valve body one (310), valve rod one (311) and valve seat one (312), the valve body one (310) and first regulating valve
Cavity wall is accommodated to fix and there is inlet opening one (315) thereon；The valve seat one (312) and the valve body one (310) it is fixed and
One end close to each other positioned at the first regulating valve accommodating chamber and the second regulating valve accommodating chamber；
With the threaded hole inside chamber one (313) and the connection chamber one (313) and valve body one in the valve body one (310)
One, the inlet opening one is connected to the intake tunnel (33) and the chamber one (313)；Described valve rod one (311) one end passes through
The threaded hole one and the chamber one (313) are offseted or are separated to seal or open the water inlet with the valve seat one (312)
Hole one (315), and the valve rod one (311) is threadedly coupled with one corresponding position of threaded hole.
3. a kind of double channel stabilized flow control water regulator according to claim 2, which is characterized in that the valve seat one (312)
Upper fixed seal ring one (314), the valve rod one (311) are offseted or are separated to seal or open with the sealing ring one (314)
The intake tunnel (33) and the chamber one (313).
4. according to a kind of double channel stabilized flow control water regulator as claimed in claim 3, which is characterized in that the sealing ring one (314)
Vulcanization is on the valve seat one (312).
5. according to a kind of double channel stabilized flow control water regulator described in claim 1, which is characterized in that second regulating valve (32)
Including valve body two (320), valve rod two (321) and valve seat two (322), the valve body two (320) is held with second regulating valve
Cavity wall of receiving is fixed and has inlet opening two (325) thereon；The valve seat two (322) is fixed with the valve body two (320) and position
In the first regulating valve accommodating chamber and the second regulating valve accommodating chamber one end close to each other；
With the threaded hole inside chamber two (323) and the connection chamber two (323) and valve body two in the valve body two (320)
Two, the inlet opening two (325) is connected to the intake tunnel (33) and the chamber two (323)；Described valve rod two (311) one end
It with the valve seat two (322) offsets or separates across the threaded hole two and the chamber two (313) and is described to seal or open
Inlet opening two (325), and the valve rod two (321) is threadedly coupled with two corresponding position of threaded hole.
6. according to a kind of double channel stabilized flow control water regulator described in claim 5, which is characterized in that on the valve seat two (322)
Fixed seal ring two (324), the valve rod two (321) are offseted or are separated to seal or open institute with the sealing ring two (324)
State intake tunnel (33) and the chamber two (323).
7. a kind of double channel stabilized flow control water regulator according to claim 6, which is characterized in that the sealing ring two
(324) vulcanization is on the valve seat two (322).
8. a kind of double channel stabilized flow control water regulator according to claim 5, which is characterized in that the valve rod two (321)
Upper connection adjusting rod (4).
9. a kind of double channel stabilized flow control water regulator according to claim 1, which is characterized in that the exhalant canal one
(34) diameter is greater than the diameter of the exhalant canal two (35).
10. -9 described in any item a kind of double channel stabilized flow control water regulators according to claim 1, which is characterized in that further include
Water inlet pipe (1) and outlet pipe (2), the water inlet pipe (1) are connected to the water inlet end of the intake tunnel (33), the outlet pipe
(2) it is connected to the water outlet of the water outlet of the exhalant canal one (34) and the exhalant canal two (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262653.XA CN109958414A (en) | 2019-04-02 | 2019-04-02 | A kind of double channel stabilized flow control water regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262653.XA CN109958414A (en) | 2019-04-02 | 2019-04-02 | A kind of double channel stabilized flow control water regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109958414A true CN109958414A (en) | 2019-07-02 |
Family
ID=67025557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910262653.XA Pending CN109958414A (en) | 2019-04-02 | 2019-04-02 | A kind of double channel stabilized flow control water regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109958414A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202039827U (en) * | 2011-05-25 | 2011-11-16 | 大庆恒源利通石油机械设备制造有限公司 | Steady flow straight-through type adjustor of water injection well |
| CN107558967A (en) * | 2017-08-14 | 2018-01-09 | 大庆市龙新机械制造有限公司 | Water injection well stable current regulator |
| CN209959221U (en) * | 2019-04-02 | 2020-01-17 | 大庆市富隆达石油工程机械设备有限公司 | Double-channel stable flow control water regulator |
-
2019
- 2019-04-02 CN CN201910262653.XA patent/CN109958414A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202039827U (en) * | 2011-05-25 | 2011-11-16 | 大庆恒源利通石油机械设备制造有限公司 | Steady flow straight-through type adjustor of water injection well |
| CN107558967A (en) * | 2017-08-14 | 2018-01-09 | 大庆市龙新机械制造有限公司 | Water injection well stable current regulator |
| CN209959221U (en) * | 2019-04-02 | 2020-01-17 | 大庆市富隆达石油工程机械设备有限公司 | Double-channel stable flow control water regulator |
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