CN204532250U - Remote high-voltage drives a well emergency shutoff device - Google Patents
Remote high-voltage drives a well emergency shutoff device Download PDFInfo
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- CN204532250U CN204532250U CN201520154586.7U CN201520154586U CN204532250U CN 204532250 U CN204532250 U CN 204532250U CN 201520154586 U CN201520154586 U CN 201520154586U CN 204532250 U CN204532250 U CN 204532250U
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- reducing valve
- valve
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- spool
- pressed gas
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Abstract
The utility model is that a kind of remote high-voltage drives a well emergency shutoff device, is the reducing valve that is sealedly and fixedly connected in the valve body side of quick action emergency valve; Reducing valve comprises a relief valve body, a reducing valve valve gap and a reducing valve spool; Pressed gas inlet hole in relief valve body is portalled with pressed gas and is communicated with outlet passageway with inlet channel respectively.Reducing valve spool is set in reducing valve valve gap, between reducing valve spool and reducing valve valve gap, is provided with reducing valve main spring.The lower end of reducing valve spool is provided with reducing valve primary seal circle, and this reducing valve primary seal circle has conical seal (contact) face, and adopts resistant material to make.Reducing valve main spring adopts die springs, and this reducing valve main spring surface is through electrophoretic process.It is safer, more steady that the utility model makes pressure line open, and can select the size of the bushing circulation latus rectum of decompression, meet the various demands of different well location according to different working conditions.Reducing valve primary seal circle prevents corrosion, and sealing good stability, reducing valve main spring is reliable and stable.
Description
Technical field
The utility model opens well shutdown appts about a kind of for the natural gas well, particularly relates to a kind of remote high-voltage and to drive a well emergency shutoff device.
Background technology
At present, along with the natural gas well is constantly exploited all the year round, part gas well due to the output time comparatively for a long time, stratum energy is low, reservoir properties is poor and produce the impact of the factors such as water, occurs following productive prospecting:
(1) gas well deliverability is low, and stable production period is generally shorter, and flowing bottomhole pressure (FBHP), oil pressure, casing pressure all decline comparatively fast;
(2) gas well generally produces water and a small amount of condensate, and there is hydrops phenomenon in shaft bottom, and gas well fluid-carrying capability is poor, affects the normal production of gas well;
(3) gas well shut-in pressure recovery extent is lower, and pressure recover is slower;
(4) gas well has certain production rate-maintenance capability under lower flowing bottomhole pressure (FBHP).
Along with China's natural gas widelys popularize application, driven the quick growth of the Pipeline transport control element market demand, the unlatching of on-the-spot high-pressure gas well normally adopts the form of emptying, high pressure gas is reduced within middle pressure downstream transfer line pressure limit, then stop emptying, start normal gas transmission.Adopt such scheme, bring a lot of potential safety hazard, especially high sulfur-bearing well location in waste source of the gas, contaminated environment, workload while strengthening.So high-pressure anti-explosion solenoid valve is widely used as important Pipeline transport cutting-off controlling element, but, existing electromagnetic valve is mostly traditional guiding high pressure explosion-proof solenoid valve, this structure is very stable in the aboveground work of high tolerance, but at the well head of low yield well or landform more complicated, fluctuation because of downstream pressure destroys the dynamic equilibrium of pilot valve internal work, easily occurs phenomenon of committing suicide by jumping into a well, and causes electromagnetic valve to occur job insecurity phenomenon.
Thus, the present inventor relies on and is engaged in experience and the practice of relevant industries for many years, proposes a kind of remote high-voltage and to drive a well emergency shutoff device, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of remote high-voltage to drive a well emergency shutoff device, with realize safer under the state of upstream line high pressure, open more stably, possess slowly drive a well, the function of remote switch.
Another object of the present utility model is to provide a kind of remote high-voltage to drive a well emergency shutoff device, according to different working conditions, can select suitable pressure and flow, meet the various demands of different well location.
The purpose of this utility model realizes like this, a kind of remote high-voltage drives a well emergency shutoff device, comprise a quick action emergency valve, in the valve body of this quick action emergency valve, level is provided with an inlet channel and an outlet passageway, and be sealedly and fixedly connected in the valve body side of described quick action emergency valve a reducing valve; Described reducing valve comprises a relief valve body, a reducing valve valve gap and a reducing valve spool; Side adjacent with the valve body of quick action emergency valve in described relief valve body is provided with a pressed gas inlet hole and a pressed gas portals, and described pressed gas inlet hole is communicated with described inlet channel by the first interface channel in the valve body of quick action emergency valve; Described pressed gas is portalled and to be communicated with described outlet passageway by the second interface channel in the valve body of quick action emergency valve; Described reducing valve valve bonnet seal is connected to the top of this relief valve body, is provided with described reducing valve spool in this reducing valve valve gap, is provided with a reducing valve main spring between the top of this reducing valve spool and described reducing valve valve gap; Form a reducing valve spool epicoele between described reducing valve spool top and reducing valve valve gap, between described reducing valve spool bottom and relief valve body, form a reducing valve spool cavity of resorption; One the 3rd interface channel is vertically provided with this reducing valve spool correspondence position in described relief valve body, 3rd interface channel upper end communicates with described reducing valve spool cavity of resorption and can be depressurized valve core and closes, and portals with described pressed gas and be communicated with in the 3rd interface channel lower end; Described pressed gas inlet hole communicates with described reducing valve spool cavity of resorption, is communicated above described pressed gas inlet hole by one the 4th interface channel with described reducing valve spool epicoele; The upper seal of described reducing valve valve gap connects a reducing valve off-load spool, this reducing valve unloader in-core is provided with the 5th interface channel and the circular passage arranged around the 5th interface channel of a vertical direction, to be portalled with described pressed gas by one the 6th interface channel and be communicated with in 5th interface channel lower end, the 5th interface channel upper end is communicated with described circular passage; Being provided with one in the 5th interface channel upper end and described circular passage connectivity part can by the 5th interface channel upper end closed and the Electrical heads headstock gear opened; Described circular passage is communicated with described reducing valve spool epicoele by one the 7th interface channel.
In a better embodiment of the present utility model, the upper surface of reducing valve off-load spool, lower surface are respectively equipped with the first annular groove and the second annular groove; Be interconnected by the communication channel being arranged on reducing valve unloader in-core between described first annular groove and the second annular groove, described first annular groove, the second annular groove and communication channel form described circular passage.
In a better embodiment of the present utility model, pressed gas inlet hole and pressed gas portal and are all horizontally disposed with, a decompression is provided with described first interface channel junction level bushing in described pressed gas inlet hole, the bushing sidewall of this decompression is provided with an open-work, and this open-work is corresponding with described 4th interface channel to be communicated with.
In a better embodiment of the present utility model, the lower end of reducing valve spool is provided with a reducing valve primary seal circle, this reducing valve primary seal circle is inlayed and is fixed on described reducing valve spool lower end, this reducing valve primary seal circle has conical seal (contact) face, and the 3rd interface channel upper end in described relief valve body is corresponding pyramidal structure; Described reducing valve primary seal circle adopts resistant material to make.
In a better embodiment of the present utility model, reducing valve main spring adopts die springs, and this reducing valve main spring surface has electrophoretic process layer.
In a better embodiment of the present utility model, be provided with an annular groove in pressed gas inlet hole, described decompression is bushing to be fastened in this annular groove.
In a better embodiment of the present utility model, the top of reducing valve spool is provided with a groove, and the lower end abutment of described reducing valve main spring is in the bottom of this groove, and upper end is resisted against on described reducing valve valve gap; Described 7th interface channel is vertically arranged in this reducing valve valve gap, and described 7th interface channel upper end is communicated with the bottom of described circular passage, and the 7th interface channel lower end communicates with described reducing valve spool epicoele.
In a better embodiment of the present utility model, reducing valve off-load spool is sealedly connected on the top of described reducing valve valve gap by gland and screw; Described Electrical heads headstock gear is connected to above described reducing valve off-load spool.
From the above mentioned, the utility model by the reducing valve that is tightly connected in the valve body side of quick action emergency valve, can under high pressure realize safer, drive a well more stably, the late gate that drives a well keep standard-sized sheet, do not produce throttle effect; Possess emergency cut-off, remote switch, spool simultaneously and the function such as to open completely.Bushing by setting up decompression, according to different working conditions, by the calculating of pressure and flow, select the size of the bushing circulation latus rectum of suitable decompression, meet the various demands of different well location.Meanwhile, reducing valve primary seal circle adopts resistant material, effectively prevents H
2s, CO
2corrosion, adopts the interior leakage phenomenon that cone-shaped seal structure can prevent sealing surface depositing gravel from causing, and improves sealing stability.Reducing valve main spring adopts high-performance die springs, this spring adopts import alloy steel, electrophoretic process is carried out on surface, under meeting total head difference, large load resets and runs and etch-proof requirement, guarantee that long compressive distortion is little, reliable and stable, Field adjustment is simple, and control accuracy can reach ± 0.1MPa, uses 300,000 deformation amount controlling within ± 1% scope.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the utility model and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: for the utility model remote high-voltage drives a well the structural representation of emergency shutoff device one sectional plane.
Fig. 2: for the utility model remote high-voltage drives a well the structural representation of another sectional plane of emergency shutoff device.
Fig. 3: for the utility model remote high-voltage drives a well the partial enlarged view at emergency shutoff device A place.
Fig. 4: for the utility model remote high-voltage drives a well the partial enlarged view at emergency shutoff device B place.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and detailed description of the invention of the present utility model is described.
As depicted in figs. 1 and 2, the utility model provides a kind of remote high-voltage and to drive a well emergency shutoff device 100, comprise a quick action emergency valve 90, in the valve body 91 of this quick action emergency valve 90, level is provided with inlet channel 910 and an outlet passageway 911, quick action emergency valve 90 is prior art, and number of patent application can be adopted in the present embodiment for the unloading high-pressure anti-explosion solenoid valve disclosed in 201120129702.1.Be sealedly connected and fixed in valve body 91 side of quick action emergency valve 90 reducing valve 80, such as, by screw, reducing valve 80 sealing is fixed on valve body 91 side.Reducing valve 80 comprises relief valve body 1, reducing valve valve gap 2 and a reducing valve spool 3.Side adjacent with the valve body 91 of quick action emergency valve 90 in relief valve body 1 is provided with a pressed gas inlet hole 4 and a pressed gas portals 5, and pressed gas inlet hole 4 is communicated with inlet channel 910 by the first interface channel 6 in the valve body 91 of quick action emergency valve 90; Pressed gas is portalled and 5 to be communicated with outlet passageway 911 by the second interface channel 7 in the valve body 91 of quick action emergency valve 90.Reducing valve valve gap 2 is sealedly connected on the top of this relief valve body 1, reducing valve spool 3 is provided with in this reducing valve valve gap 2, a reducing valve main spring 8 is provided with between the top of this reducing valve spool 3 and reducing valve valve gap 2, form a reducing valve spool epicoele 9 between reducing valve spool 3 top and reducing valve valve gap 2, between reducing valve spool 3 bottom and relief valve body 1, form a reducing valve spool cavity of resorption 10.One the 3rd interface channel 11 is vertically provided with this reducing valve spool 3 correspondence position in relief valve body 1,3rd interface channel 11 upper end communicates with reducing valve spool cavity of resorption 10 and can be depressurized valve core 3 and closes, and the 3rd interface channel 11 lower end and pressed gas portal and 5 to be communicated with.Pressed gas inlet hole 4 communicates with reducing valve spool cavity of resorption 10, is communicated above pressed gas inlet hole 4 by one the 4th interface channel 12 with reducing valve spool epicoele 9.The upper seal of reducing valve valve gap 2 connects a reducing valve off-load spool 13, and concrete, reducing valve off-load spool 13 is sealedly connected on the top of reducing valve valve gap 2 by gland 131 and screw.The 5th interface channel 14 and a circular passage 15 arranged around its inside of a vertical direction is provided with in this reducing valve off-load spool 13, as shown in Figure 4, the first annular groove 151 and the second annular groove 152 is respectively equipped with in the plane of the upper surface of reducing valve off-load spool 13, lower surface; Be interconnected by the communication channel 153 be arranged in reducing valve off-load spool 13 between first annular groove 151 and the second annular groove 152, the first annular groove 151, second annular groove 152 and communication channel 153 looping passage 15.Portalled by one the 6th interface channel 16 and pressed gas and 5 to be communicated with in 5th interface channel 14 lower end, the 5th interface channel 14 upper end is communicated with circular passage 15; Being provided with one in the 5th interface channel 14 upper end and circular passage 15 connectivity part can by the 5th interface channel 14 upper end closed and the Electrical heads headstock gear 17 opened, Electrical heads headstock gear 17 is connected to above reducing valve off-load spool 13, and Electrical heads wherein by the 5th interface channel 14 upper end closed or can be opened.Electrical heads headstock gear 17 is prior art, can see application number for the two Electrical heads brief energization headstock gear disclosed in 201020219193.7 and the above-mentioned number of patent application mentioned are the unloading high-pressure anti-explosion solenoid valve disclosed in 201120129702.1.Circular passage 15 is communicated with reducing valve spool epicoele 9 by one the 7th interface channel 18.
Further, pressed gas inlet hole 4 and pressed gas portal and 5 to be all horizontally disposed with, a decompression bushing 19 is provided with the first interface channel 6 junction level in pressed gas inlet hole 4, as shown in Figure 3, the sidewall of this decompression bushing 19 is provided with an open-work 191, and this open-work 191 is corresponding with the 4th interface channel 12 to be communicated with.Concrete, be provided with an annular groove in pressed gas inlet hole 4, reducing pressure bushing 19 is fastened in this annular groove.By setting up decompression bushing 19, can according to different working conditions, by the calculating of pressure and flow, select the bushing 19 suitable circulation latus rectums of decompression, realize the various demands that product meets different well location.
Further, the lower end of reducing valve spool 3 is provided with a reducing valve primary seal circle 31, the lower end being fixed on reducing valve spool 3 inlayed by this reducing valve primary seal circle 31, this reducing valve primary seal circle 31 has conical seal (contact) face, and the 3rd interface channel 11 upper end in relief valve body 1 is that corresponding pyramidal structure is mated sealing; Reducing valve primary seal circle 31 adopts resistant material to make.Reducing valve primary seal circle 31 adopts conical surface seal form, this sealing means achieves minor structure and reliably seals, the interior leakage phenomenon simultaneously preventing sealing surface depositing gravel to cause, relatively traditional sphere, flat seal are more reliable, meet the requirement of zero leakage under long period frequent operation operating mode.Reducing valve primary seal circle 31 adopts resistant material, effectively prevents H
2s, CO
2corrosion, by open and close test and on-the-spot application verification repeatedly in early stage, seals reliable and stable.
Further, reducing valve main spring 8 adopts die springs, die springs performance is high, and this reducing valve main spring 8 surface is through electrophoretic process, under meeting total head difference, large load resets and runs and etch-proof requirement, guarantee that long compressive distortion is little, reliable and stable, Field adjustment is simple, and control accuracy can reach ± 0.1MPa; Guarantee that use 300,000 deformation amount controlling are within ± 1% scope.Can select the spring of different-stiffness according to the different production pressure in scene and flow, different model, the spring of different size adopts different colors, effectively prevents wrongly installed possibility.Concrete, the top of reducing valve spool 3 is provided with a groove, and the lower end abutment of reducing valve main spring 8 is in the bottom of this groove, and upper end is resisted against on reducing valve valve gap 2.7th interface channel 18 to be vertically arranged in this reducing valve valve gap 2 and to be positioned at above reducing valve spool epicoele 9, and the 7th interface channel 18 upper end is communicated with the bottom of circular passage 15, and its lower end communicates with reducing valve spool epicoele 9.
Unlatching flow process of the present utility model is: when long-range (or manual) opens, be energized to the Electrical heads headstock gear 17 of reducing valve 80, 5th interface channel 14 upper end is opened by Electrical heads wherein, 5th interface channel 14 upper end is communicated with circular passage 15, by reducing valve off-load spool 13, reducing valve spool epicoele 9 is communicated with line downstream, because of the damping effect of runner in reducing valve off-load spool 13, at reducing valve spool epicoele 9, between reducing valve spool cavity of resorption 10, mineralization pressure is poor, because reducing valve spool cavity of resorption 10 communicates with pressed gas inlet hole 4, so the pressure of reducing valve spool cavity of resorption 10 is greater than the pressure of reducing valve spool epicoele 9, this pressure differential overcomes the spring force of reducing valve main spring 8 and the frictional force of reducing valve spool 3, reducing valve spool 3 is risen to maximum Lift, reducing valve 80 is opened, pressed gas is by decompression bushing 19 and the 3rd interface channel 11, pressed gas portal 5 expenditure and pressure, pipeline pressure relief is made to arrive within the safety value of setting, then long-range (or manual) closes reducing valve 80, open quick action emergency valve 90 simultaneously and carry out normal gas transmission, the unlatching flow process of quick action emergency valve 90 refers to unloading high-pressure anti-explosion solenoid valve (application number: CN201120129702.1).
Closing flow path: long-range (or manually) closes quick action emergency valve 90, gas well safety shutdown, and upstream line pressure is built the pressure by long realization, enters the next one and to drive a well flow process.The closing flow path of quick action emergency valve 90 refers to unloading high-pressure anti-explosion solenoid valve (application number: CN201120129702.1).
Remote high-voltage of the present utility model drives a well emergency shutoff device 100 by setting up a set of reducing valve 80 on the basis of quick action emergency valve 90, when high pressure drives a well, the kinetic energy of flow velocity and fluid is forced to change by reducing valve 80, cause the different pressure losses, thus reach the object of decompression, and rely on energy hole and the adjustment of flow media itself, the spring force of the fluctuation of downstream pressure and reducing valve main spring 8 is balanced each other, downstream pressure is made out to keep constant in certain error range, the valve recovering normal rear quick action emergency valve 90 Deng line pressure keeps standard-sized sheet, do not produce any throttle effect.The utility model possesses functions such as slowly driving a well, emergency cut-off, remote switch, spool are opened completely.Reach reducing valve 80 and the Time-sharing control of quick action emergency valve 90 by Long-distance Control, do not make because high pressure drives a well control conflicts.The safety that this apparatus structure is compact, simple to operate, guarantee field trial, greatly reduces the security risk of well head staff, also obtains good effect in labor organization optimization, production management organization optimization simultaneously.
The foregoing is only the schematic detailed description of the invention of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.
Claims (8)
1. remote high-voltage drives a well an emergency shutoff device, and comprise a quick action emergency valve, in the valve body of this quick action emergency valve, level is provided with an inlet channel and an outlet passageway, it is characterized in that: be sealedly and fixedly connected in the valve body side of described quick action emergency valve a reducing valve; Described reducing valve comprises a relief valve body, a reducing valve valve gap and a reducing valve spool; Side adjacent with the valve body of quick action emergency valve in described relief valve body is provided with a pressed gas inlet hole and a pressed gas portals, and described pressed gas inlet hole is communicated with described inlet channel by the first interface channel in the valve body of quick action emergency valve; Described pressed gas is portalled and to be communicated with described outlet passageway by the second interface channel in the valve body of quick action emergency valve; Described reducing valve valve bonnet seal is connected to the top of this relief valve body, is provided with described reducing valve spool in this reducing valve valve gap, is provided with a reducing valve main spring between the top of this reducing valve spool and described reducing valve valve gap; Form a reducing valve spool epicoele between described reducing valve spool top and reducing valve valve gap, between described reducing valve spool bottom and relief valve body, form a reducing valve spool cavity of resorption; One the 3rd interface channel is vertically provided with this reducing valve spool correspondence position in described relief valve body, 3rd interface channel upper end communicates with described reducing valve spool cavity of resorption and can be depressurized valve core and closes, and portals with described pressed gas and be communicated with in the 3rd interface channel lower end; Described pressed gas inlet hole communicates with described reducing valve spool cavity of resorption, is communicated above described pressed gas inlet hole by one the 4th interface channel with described reducing valve spool epicoele; The upper seal of described reducing valve valve gap connects a reducing valve off-load spool, this reducing valve unloader in-core is provided with the 5th interface channel and the circular passage arranged around the 5th interface channel of a vertical direction, to be portalled with described pressed gas by one the 6th interface channel and be communicated with in 5th interface channel lower end, the 5th interface channel upper end is communicated with described circular passage; Being provided with one in the 5th interface channel upper end and described circular passage connectivity part can by the 5th interface channel upper end closed and the Electrical heads headstock gear opened; Described circular passage is communicated with described reducing valve spool epicoele by one the 7th interface channel.
2. remote high-voltage as claimed in claim 1 drives a well emergency shutoff device, it is characterized in that: upper surface, the lower surface of described reducing valve off-load spool are respectively equipped with the first annular groove and the second annular groove; Be interconnected by the communication channel being arranged on reducing valve unloader in-core between described first annular groove and the second annular groove, described first annular groove, the second annular groove and communication channel form described circular passage.
3. remote high-voltage as claimed in claim 2 drives a well emergency shutoff device, it is characterized in that: described pressed gas inlet hole and pressed gas portal and be all horizontally disposed with, a decompression is provided with described first interface channel junction level bushing in described pressed gas inlet hole, the bushing sidewall of this decompression is provided with an open-work, and this open-work is corresponding with described 4th interface channel to be communicated with.
4. remote high-voltage as claimed in claim 3 drives a well emergency shutoff device, it is characterized in that: the lower end of described reducing valve spool is provided with a reducing valve primary seal circle, this reducing valve primary seal circle is inlayed and is fixed on described reducing valve spool lower end, this reducing valve primary seal circle has conical seal (contact) face, and the 3rd interface channel upper end in described relief valve body is corresponding pyramidal structure; Described reducing valve primary seal circle adopts resistant material to make.
5. remote high-voltage as claimed in claim 4 drives a well emergency shutoff device, it is characterized in that: described reducing valve main spring adopts die springs, and this reducing valve main spring surface has electrophoretic process layer.
6. remote high-voltage as claimed in claim 5 drives a well emergency shutoff device, and it is characterized in that: be provided with an annular groove in described pressed gas inlet hole, described decompression is bushing to be fastened in this annular groove.
7. remote high-voltage as claimed in claim 6 drives a well emergency shutoff device, and it is characterized in that: the top of described reducing valve spool is provided with a groove, the lower end abutment of described reducing valve main spring is in the bottom of this groove, and upper end is resisted against on described reducing valve valve gap; Described 7th interface channel is vertically arranged in this reducing valve valve gap, and described 7th interface channel upper end is communicated with the bottom of described circular passage, and the 7th interface channel lower end communicates with described reducing valve spool epicoele.
8. remote high-voltage as claimed in claim 7 drives a well emergency shutoff device, it is characterized in that: described reducing valve off-load spool is sealedly connected on the top of described reducing valve valve gap by gland and screw; Described Electrical heads headstock gear is connected to above described reducing valve off-load spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520154586.7U CN204532250U (en) | 2015-03-18 | 2015-03-18 | Remote high-voltage drives a well emergency shutoff device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520154586.7U CN204532250U (en) | 2015-03-18 | 2015-03-18 | Remote high-voltage drives a well emergency shutoff device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204532250U true CN204532250U (en) | 2015-08-05 |
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ID=53746273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520154586.7U Withdrawn - After Issue CN204532250U (en) | 2015-03-18 | 2015-03-18 | Remote high-voltage drives a well emergency shutoff device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204532250U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727778A (en) * | 2015-03-18 | 2015-06-24 | 中国石油大学(北京) | Remote high-pressure well opening emergency cut-off device |
| CN112943163A (en) * | 2021-01-12 | 2021-06-11 | 中国石油天然气股份有限公司 | Electromagnetic type middle-low pressure gas collection gas well remote control well switching device, system and method |
-
2015
- 2015-03-18 CN CN201520154586.7U patent/CN204532250U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727778A (en) * | 2015-03-18 | 2015-06-24 | 中国石油大学(北京) | Remote high-pressure well opening emergency cut-off device |
| CN104727778B (en) * | 2015-03-18 | 2017-04-12 | 中国石油大学(北京) | Remote high-pressure well opening emergency cut-off device |
| CN112943163A (en) * | 2021-01-12 | 2021-06-11 | 中国石油天然气股份有限公司 | Electromagnetic type middle-low pressure gas collection gas well remote control well switching device, system and method |
| CN112943163B (en) * | 2021-01-12 | 2023-04-07 | 中国石油天然气股份有限公司 | Electromagnetic type middle-low pressure gas collection gas well remote control well switching device, system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20170412 |