CN112780225B - Well mouth watering combination valve of oil production well - Google Patents
Well mouth watering combination valve of oil production well Download PDFInfo
- Publication number
- CN112780225B CN112780225B CN202110199842.4A CN202110199842A CN112780225B CN 112780225 B CN112780225 B CN 112780225B CN 202110199842 A CN202110199842 A CN 202110199842A CN 112780225 B CN112780225 B CN 112780225B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims description 14
- 238000005485 electric heating Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000003129 oil well Substances 0.000 abstract description 3
- 238000007710 freezing Methods 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 43
- 238000000034 method Methods 0.000 description 7
- 230000032683 aging Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/003—Insulating arrangements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to the technical field of oil well exploitation, and discloses a wellhead watering combination valve of an oil production well, which comprises a valve body, wherein an oil return pipe is fixedly communicated with the left end of the valve body, a protective shell positioned on the outer side surface of the oil return pipe is fixedly installed at the left end of the valve body, a light-touch switch is fixedly installed at the left end of the protective shell, and a sealing sleeve is arranged at the left end of the light-touch switch. This oil recovery well head watering combination valve, through the inside gas of gasbag because the lower production of ambient temperature compresses the pulling movable block and removes and stimulate the movable rod displacement in seal cover inside, the switch of heating wire is opened and can be heated back to oil pipe when the movable rod is no longer contacted with the light touch switch and prevent freezing, otherwise the inside gas expansion of the higher gasbag of temperature promotes the movable block to the left side displacement and drives the movable rod displacement when the movable rod contacts with the light touch switch, the switch of heating wire can be closed, stop heating, thereby realized can prevent to return the inside advantage that freezes of oil pipe.
Description
Technical Field
The invention relates to the technical field of oil well exploitation, in particular to a wellhead watering combination valve of an oil production well.
Background
Oil recovery engineering is a general term for various engineering technical measures taken on an oil reservoir through a production well and an injection well according to development targets in the oil field exploitation process. As a comprehensive application subject, the theory, the engineering design method and the implementation technology of various engineering technical measures which can economically and effectively act on an oil reservoir to improve the yield of an oil well and the recovery ratio of crude oil are researched. Oil recovery projects are faced with various types of oil reservoirs with different geological conditions and dynamic changes, and good economic effects can be obtained only by correctly selecting and implementing technically feasible and economically reasonable engineering technical schemes according to the geological conditions and the dynamic changes of the oil reservoirs. To do this, it is necessary to carry out comprehensive comparative analysis on the basis of mastering the basic principles, calculation and engineering design methods of various engineering technical measures. In the oil production process, an oil production well is generally utilized to produce an oil field, and a combination valve is generally installed at the wellhead of the oil production well to control a valve in order to prevent water seepage from the wellhead.
The combined regulating valve is a regulating valve with high mechanical transmission mechanism efficiency. The combined regulating valves are modular and may be combined into different kinds of self-operated regulating valves. A self-operated pressure-differential pressure combination valve, a self-operated flow-temperature combination valve, a self-operated flow-pressure combination valve and the like. The utility model discloses a pipeline, including pipeline, combination governing valve, pipeline, heat preservation cotton, pipeline, temperature control device, pipeline, heat preservation cotton, the use is very inconvenient, the effect of keeping warm is relatively poor simultaneously, can be used to noncorrosive liquid, various parameters of gas and steam medium come control parameter according to the principle of action of priority, combination governing valve generally can install the pipeline in the one end of combination valve when in-service use and be used for oil return or return water operation, but these pipelines are generally all directly exposed to use outdoors, when meetting.
The pipeline of combination valve one end generally all directly exposes in with the air in actual environment, and external environment is comparatively complicated, though pipeline itself adopts the design of anticorrosion and ageing resistance, nevertheless still can lead to the life-span of pipeline to receive very big influence because external environment is too abominable when in-service use, leads to the combination valve to need frequently to change the pipeline, and then leads to the increase influence of cost to use.
Meanwhile, the combined valve generally adopts the design of modules, but the number of the modules of the combined valve used at present is determined before the combined valve leaves a factory, and each module can not be combined conveniently so as to combine other branch valves on the basis of the main valve body, the branch valves and the valve body are difficult to disassemble, and the number and the positions of each branch valve can not be adjusted frequently according to needs to meet the use requirement.
Disclosure of Invention
The invention provides a wellhead water-mixing combined valve of an oil production well, which has the advantages of preventing the interior of an oil return pipe from being frozen, slowing down the aging speed of a pipeline and facilitating the disassembly and assembly of a branch valve, and solves the problems in the background art.
The invention provides the following technical scheme: the utility model provides an oil recovery well head watering combination valve, includes the valve body, the left end fixed intercommunication of valve body has back oil pipe, the left end fixed mounting of valve body has the protective housing that is located back oil pipe lateral surface, the left end fixed mounting of protective housing has the light touch switch, the left end of light touch switch is equipped with the seal cover, the fixed intercommunication in top of seal cover has the gasbag, the inner chamber movable mounting of seal cover has the movable block, the one end fixed mounting of movable block has the movable rod, the left end of movable rod runs through the seal cover and contacts with one side of light touch switch, the heating wire that is located back oil pipe lateral surface is installed to the one end of light touch switch, the input of heating wire and the output electric connection of light touch switch.
Preferably, the left side and the right side of protective housing bottom all fixed mounting have the draw runner, the bottom of protective housing is equipped with the protection shield, activity joint between protection shield and the draw runner.
Preferably, the bottom fixed mounting of valve body has the mounting panel, the one end fixed mounting of mounting panel has reset spring, reset spring's the other end and one side fixed connection of protection shield, the bottom fixed mounting of protection shield has the handle.
Preferably, the cross sectional area of the movable block is the same as that of the seal sleeve, one end of the movable block is fixedly provided with a fixed spring positioned on the outer side surface of the movable rod, and the other end of the fixed spring is fixedly connected with one side of the seal sleeve.
Preferably, the middle part fixed mounting of valve body bottom has the main valve, the mounting groove has all been seted up to the left and right sides on valve body top, the inside activity joint of mounting groove has a valve.
Preferably, the top fixed mounting of valve body has the fixed cover that is located the mounting groove top, the top fixed mounting of fixed cover has sealed the pad, the lateral surface that sealed the pad contacts with the lateral surface of a valve.
Preferably, the fixed orifices have been seted up to the equal angle of lateral surface of fixed cover, the inside activity joint of fixed orifices has the dead lever, the top fixed mounting of dead lever has the limiting plate, spacing spring has been cup jointed in the lateral surface activity of dead lever, spacing spring's upper and lower both ends respectively with the bottom of limiting plate and the lateral surface fixed connection of fixed cover.
The invention has the following beneficial effects:
1. the wellhead watering combination valve of the oil production well is characterized in that one end of the valve body is communicated with an oil return pipe, the outer side surface of the oil return pipe is wound with an electric heating wire, one end of the electric heating wire is connected with the light touch switch, one end of the light touch switch is connected with the movable rod, when the combination valve is in cold weather, the gas in the air bag is compressed due to low outside temperature to pull the movable block to move in the sealing sleeve and pull the movable rod to move, when the movable rod is not in contact with the light-touch switch any more, the switch of the electric heating wire is turned on to heat the oil return pipe to prevent icing, otherwise, the gas in the air bag with higher temperature expands to push the movable block to move towards the left side and drive the movable rod to move, when the movable rod is in contact with the light-touch switch, the switch of the electric heating wire can be closed to stop heating, thereby realizing the advantage of preventing the oil return pipe from freezing.
2. This oil recovery well head watering combination valve, through be fixed with the protective housing that is located back oil pipe lateral surface between valve body and light touch switch, and be fixed with the draw runner in the both sides of protective housing bottom, and then movable mounting has the protection shield in the bottom of draw runner, the protective housing that is located back oil pipe lateral surface can block back oil pipe when in-service use, slow down the influence of external environment to returning oil pipe, slow down its ageing speed, accessible pulling handle can drive the relative draw runner displacement of protection shield and then overhaul back oil pipe simultaneously, it accomplishes fixedly to loosen the automatic re-setting that handle reset spring can drive the protection shield simultaneously, thereby realized the advantage that can slow down the ageing speed of pipeline.
3. This oil recovery well head watering combination valve, the mounting groove has been seted up through the both sides on valve body top, and internally mounted at the mounting groove has a valve, contact between the lateral surface of a valve simultaneously and the sealed medial surface that fills up, accessible draws three movable rod to the outside when valve is dismantled to needs, can stimulate the spacing spring of movable rod lateral surface, spacing spring can be stretched when the movable rod leaves the inside of fixed orifices this moment, can remove the fixed between movable rod and the valve, can upwards mention a valve and accomplish the dismantlement this moment, otherwise can accomplish the installation, thereby realized making things convenient for the advantage of a dismouting valve.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the bottom structure of the present invention;
FIG. 3 is an exploded view of the protective case of the present invention;
FIG. 4 is an exploded view of the valve manifold of the present invention;
FIG. 5 is a diagram illustrating the structure of the heating wire according to the present invention;
FIG. 6 is a cross-sectional view of the internal structure of the present invention;
fig. 7 is an enlarged schematic view of the structure at a in fig. 4.
In the figure: 1. a valve body; 2. a main valve; 3. a branch valve; 4. mounting grooves; 5. fixing a sleeve; 6. a fixing hole; 7. fixing the rod; 8. a limiting plate; 9. a limiting spring; 10. a gasket; 11. a protective shell; 12. a slide bar; 13. a protection plate; 14. a handle; 15. mounting a plate; 16. a return spring; 17. an oil return pipe; 18. sealing sleeves; 19. an air bag; 20. a movable block; 21. fixing the spring; 22. a movable rod; 23. a tact switch; 24. an electric heating wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, a wellhead watering combination valve for an oil production well comprises a valve body 1, wherein an oil return pipe 17 is fixedly communicated with the left end of the valve body 1, a protective shell 11 positioned on the outer side surface of the oil return pipe 17 is fixedly installed at the left end of the valve body 1, a light-touch switch 23 is fixedly installed at the left end of the protective shell 11, a sealing sleeve 18 is arranged at the left end of the light-touch switch 23, an air bag 19 is fixedly communicated with the top end of the sealing sleeve 18, a movable block 20 is movably installed in an inner cavity of the sealing sleeve 18, a movable rod 22 is fixedly installed at one end of the movable block 20, the left end of the movable rod 22 penetrates through the sealing sleeve 18 and contacts with one side of the light-touch switch 23, an electric heating wire 24 positioned on the outer side surface of the oil return pipe 17 is.
Wherein, the equal fixed mounting in the left and right sides of protective housing 11 bottom has draw runner 12, and the bottom of protective housing 11 is equipped with protection shield 13, and the activity joint between protection shield 13 and the draw runner 12 is located the protective housing 11 of returning oil pipe 17 lateral surface and can block back oil pipe 17, slows down the influence of external environment to returning oil pipe, slows down its ageing speed.
Wherein, the bottom fixed mounting of valve body 1 has mounting panel 15, the one end fixed mounting of mounting panel 15 has reset spring 16, reset spring 16's the other end and one side fixed connection of protection shield 13, the bottom fixed mounting of protection shield 13 has handle 14, accessible pulling handle 14 can drive the relative draw runner 12 displacement of protection shield 13 and then overhaul back oil pipe 17, unclamp handle 14 reset spring 16 simultaneously and can drive the automatic re-setting completion of protection shield 13 fixed.
Wherein, the cross sectional area of movable block 20 is the same with the cross sectional area of seal cover 18, the one end fixed mounting of movable block 20 has the fixed spring 21 that is located the lateral surface of movable rod 22, the other end of fixed spring 21 and one side fixed connection of seal cover 18, fixed spring 21 can be when the ambient temperature is higher the inside gas expansion of gasbag 19 promotes movable block 20 to the left side displacement and drives movable rod 22 displacement when movable rod 22 and light touch switch 23 contact, the switch of heating wire 24 can be closed, the reset speed of quick movable rod 22 that fixed spring 21 can add.
Wherein, the middle part fixed mounting of 1 bottom of valve body has main valve 2, and mounting groove 4 has all been seted up to the left and right sides on 1 top of valve body, and the inside activity joint of mounting groove 4 has a branch valve 3.
Wherein, the top fixed mounting of valve body 1 has the fixed cover 5 that is located the mounting groove 4 top, and the top fixed mounting of fixed cover 5 has sealed the pad 10, and the lateral surface that sealed pad 10 contacts with the lateral surface of a valve 3, and the leakproofness of a valve 3 can be multiplicable to sealed pad 10, prevents to produce the water leakage phenomenon between a valve 3 and the valve body 1.
Wherein, fixed orifices 6 have been seted up to angles such as the lateral surface of fixed cover 5, the inside activity joint of fixed orifices 6 has dead lever 7, the top fixed mounting of dead lever 7 has limiting plate 8, limiting spring 9 has been cup jointed in the lateral surface activity of dead lever 7, limiting spring 9's upper and lower both ends respectively with limiting plate 8's bottom and fixed cover 5's lateral surface fixed connection, accessible outside the three movable rod 22 of pulling when valve 3 is dismantled to needs, can stimulate the limiting spring 9 of 22 lateral surfaces of movable rod, limiting spring 9 can be stretched when movable rod 22 leaves the inside of fixed orifices 6 this moment, can remove fixed between movable rod 22 and the valve 3, can upwards mention valve 3 this moment and accomplish the dismantlement, otherwise can accomplish the installation.
When the combined valve is used, the sealing sleeve 18 can be fixed with the light-touch switch 23 by using a connecting piece, the protective plate 13 can be driven to move relative to the slide bar 12 by pulling the handle 14 to further overhaul the oil return pipe 17, the return spring 16 of the handle 14 can be released to drive the protective plate 13 to automatically reset to complete the fixation, when the combined valve is in cold weather, gas in the air bag 19 is compressed due to low external temperature to pull the movable block 20 to move in the sealing sleeve 18 and pull the movable rod 22 to move, when the movable rod 22 is not in contact with the light-touch switch 23, the switch of the electric heating wire 24 is opened to heat the oil return pipe 17 to prevent icing, otherwise, the gas in the air bag 19 with higher temperature expands to push the movable block 20 to move to the left side and drive the movable rod 22 to move, and when the movable rod 22 is in contact with the light-touch switch 23, the switch of heating wire 24 can be closed, stop heating, and the accessible pulls three movable rod 22 to the outside when valve 3 is dismantled to needs, can pull the spacing spring 9 of movable rod 22 lateral surface, and spacing spring 9 can be stretched when movable rod 22 leaves the inside of fixed orifices 6 this moment, can remove the fixed between movable rod 22 and the valve 3, can upwards mention valve 3 this moment and accomplish the dismantlement, otherwise can accomplish the installation.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a production well head watering combination valve, includes valve body (1), its characterized in that: an oil return pipe (17) is fixedly communicated with the left end of the valve body (1), a protective shell (11) positioned on the outer side surface of the oil return pipe (17) is fixedly installed at the left end of the valve body (1), a soft touch switch (23) is fixedly arranged at the left end of the protective shell (11), a sealing sleeve (18) is arranged at the left end of the soft touch switch (23), the top end of the sealing sleeve (18) is fixedly communicated with an air bag (19), the inner cavity of the sealing sleeve (18) is movably provided with a movable block (20), one end of the movable block (20) is fixedly provided with a movable rod (22), the left end of the movable rod (22) penetrates through the sealing sleeve (18) and is contacted with one side of the light-touch switch (23), one end of the light touch switch (23) is provided with an electric heating wire (24) positioned on the outer side surface of the oil return pipe (17), the input end of the electric heating wire (24) is electrically connected with the output end of the light touch switch.
2. The wellhead watering combination valve for a production well according to claim 1, characterized in that: the left and right sides in protective housing (11) bottom all fixed mounting have draw runner (12), the bottom of protective housing (11) is equipped with protection shield (13), the activity joint between protection shield (13) and draw runner (12).
3. The wellhead watering combination valve for a production well according to claim 2, characterized in that: the bottom fixed mounting of valve body (1) has mounting panel (15), the one end fixed mounting of mounting panel (15) has reset spring (16), one side fixed connection of the other end of reset spring (16) and protection shield (13), the bottom fixed mounting of protection shield (13) has handle (14).
4. The wellhead watering combination valve for a production well according to claim 1, characterized in that: the cross sectional area of the movable block (20) is the same as that of the sealing sleeve (18), one end of the movable block (20) is fixedly provided with a fixed spring (21) located on the outer side face of the movable rod (22), and the other end of the fixed spring (21) is fixedly connected with one side of the sealing sleeve (18).
5. The wellhead watering combination valve for a production well according to claim 1, characterized in that: the middle part fixed mounting of valve body (1) bottom has main valve (2), mounting groove (4) have all been seted up to the left and right sides on valve body (1) top, the inside activity joint of mounting groove (4) has a valve (3).
6. The wellhead watering combination valve for a production well according to claim 5, characterized in that: the top fixed mounting of valve body (1) has fixed cover (5) that are located mounting groove (4) top, the top fixed mounting of fixed cover (5) has sealed pad (10), the lateral surface that seals up (10) contacts with the lateral surface of a valve (3).
7. The wellhead watering combination valve for a production well according to claim 6, characterized in that: fixed orifices (6) have been seted up to angles such as the lateral surface of fixed cover (5), the inside activity joint of fixed orifices (6) has dead lever (7), the top fixed mounting of dead lever (7) has limiting plate (8), spacing spring (9) have been cup jointed in the lateral surface activity of dead lever (7), the upper and lower both ends of spacing spring (9) respectively with the bottom of limiting plate (8) and the lateral surface fixed connection of fixed cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110199842.4A CN112780225B (en) | 2021-02-23 | 2021-02-23 | Well mouth watering combination valve of oil production well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110199842.4A CN112780225B (en) | 2021-02-23 | 2021-02-23 | Well mouth watering combination valve of oil production well |
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| CN112780225A CN112780225A (en) | 2021-05-11 |
| CN112780225B true CN112780225B (en) | 2021-07-13 |
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| CN202110199842.4A Active CN112780225B (en) | 2021-02-23 | 2021-02-23 | Well mouth watering combination valve of oil production well |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482566A (en) * | 2021-08-18 | 2021-10-08 | 姜水 | Water-mixing process combined well head |
| CN114801025B (en) * | 2022-04-25 | 2023-01-10 | 广东百赞智能装备有限公司 | Vertical injection molding machine with I-shaped clamping mechanism |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2841952Y (en) * | 2005-09-01 | 2006-11-29 | 杨家凤 | The antifreeze wellhead assembly of ring-type flow process |
| CN202706992U (en) * | 2012-08-29 | 2013-01-30 | 大庆市天德忠石油科技有限公司 | Watering flow wellhead combination valve of oil well valve |
| US10914425B2 (en) * | 2013-05-02 | 2021-02-09 | Ysn Imports, Inc. | Combination valve assembly with actuatable overfill relief |
| CN204041003U (en) * | 2014-09-16 | 2014-12-24 | 栗秀恒 | Producing well water mixing automatic control valve |
| CN109084032B (en) * | 2018-09-13 | 2020-04-03 | 黑龙江省易爱蒽新材料科技发展有限公司 | Energy-saving and consumption-reducing regulator capable of realizing fine adjustment of water mixing and well washing control |
| CN210289770U (en) * | 2019-07-18 | 2020-04-10 | 郭从新 | Oil recovery well head sampling device that prevents frostbite |
| CN212317937U (en) * | 2020-04-08 | 2021-01-08 | 永嘉企达知识产权咨询有限公司 | Well head combination valve for water mixing flow of oil well valve |
| CN112212068A (en) * | 2020-11-01 | 2021-01-12 | 舒瑞 | Valve with anti-freezing function |
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