CN116044346A - Automatic compensation sealing low-high pressure switching valve and sealing method thereof - Google Patents
Automatic compensation sealing low-high pressure switching valve and sealing method thereof Download PDFInfo
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- CN116044346A CN116044346A CN202211651660.7A CN202211651660A CN116044346A CN 116044346 A CN116044346 A CN 116044346A CN 202211651660 A CN202211651660 A CN 202211651660A CN 116044346 A CN116044346 A CN 116044346A
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- 238000007789 sealing Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004891 communication Methods 0.000 claims description 20
- 230000006837 decompression Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 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
- E21B34/06—Valve arrangements for boreholes or wells in wells
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
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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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/01—Sealings characterised by their shape
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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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
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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)
- Taps Or Cocks (AREA)
Abstract
The invention relates to the technical field of oil gas lifting equipment, in particular to an automatic compensation sealing low-high pressure switching valve which comprises a valve body and a valve core rotatably arranged in the valve body, wherein an expansion type hollow sealing ring is fixed on the inner wall of the valve body, and the expansion type hollow sealing ring seals a gap between the valve body and the valve core. The invention also provides a sealing method of the low-high pressure switching valve, which utilizes the expansion type hollow sealing ring to seal the gap between the valve body and the valve core. The invention can avoid the problem of air leakage between the valve body and the valve core of the high-pressure conversion valve caused by leakage of low-pressure high-pressure air.
Description
Technical Field
The invention relates to the technical field of oil gas lifting equipment, in particular to an automatic compensation sealing low-high pressure switching valve and a sealing method thereof.
Background
A common gas lift oil production device is one way to rely on the mixing of high pressure gas injected into a well from the surface with oil layer production fluid in a well bore, and the expansion of the gas is used to reduce the density of the mixture in the well bore, so as to lift crude oil flowing into the well to the surface; another way is to pump the gas-lift ball down the string with high pressure gas and then lift the oil to the surface by the thrust of the high pressure gas and gas-lift ball.
The gas lift oil extraction device comprises a gas lift ball, a ball receiving and throwing device and a grading starting device, wherein the ball receiving and throwing device is provided with a low-high pressure switching valve, the gas lift ball is thrown into a valve body of the low-high pressure switching valve from a ball inlet and enters a ball inlet channel of a valve core, then when the valve core rotates to the ball inlet channel to be communicated with a high-pressure air channel, a ball outlet channel is communicated with the ball outlet, and the high-pressure air in the high-pressure air channel forces the gas lift ball to sequentially pass through the ball inlet channel and the ball outlet channel at a high speed and be ejected from the ball outlet.
However, a gap exists between the valve body and the valve core of the low-high pressure switching valve, part of high-pressure air can leak from the gap between the valve body and the valve core under the action of pressure difference, and when sand grains exist in the high-pressure air, the sand grains can accelerate abrasion between the valve body and the valve core, so that the gap is increased, and leakage is aggravated.
Disclosure of Invention
The invention aims to provide an automatic compensation sealing low-high pressure switching valve, which is designed for the low-high pressure switching valve and can avoid the problem of air leakage between a valve body and a valve core of the low-high pressure switching valve.
Another object of the present invention is to provide a sealing method of a low-high pressure switching valve, which is designed for sealing the low-high pressure switching valve, and can avoid the problem of leakage of low-high pressure air between a valve body and a valve core of the high-pressure switching valve.
The embodiment of the invention is realized by the following technical scheme:
the automatic compensating and sealing low-high pressure converting valve includes one valve body and one valve core set inside the valve body, and one expansion hollow sealing ring fixed to the inner wall of the valve body to seal the gap between the valve body and the valve core.
In one embodiment of the invention, the high-pressure air channel of the valve body is communicated with a pressure reducing device, and the low-pressure output end of the pressure reducing device is communicated with the expansion hollow sealing ring.
In an embodiment of the invention, the expansion type hollow seal ring comprises a first seal ring and a second seal ring, wherein the first seal ring seals a gap between the valve body and the valve core, and the second seal ring seals a gap between the ball inlet channel outlet/ball outlet channel inlet/high pressure air channel outlet and the valve core.
In an embodiment of the present invention, the pressure reducing device includes an electrically controlled pressure reducing valve, one end of which is communicated with the high pressure air channel, and a split row, the other end of which is communicated with the split row, and the split row is respectively communicated with the first sealing ring and the second sealing ring.
In an embodiment of the invention, the valve body is provided with a communication hole, one end of the communication hole is communicated with the inner cavity of the valve body, and the other end of the communication hole is communicated with the expansion hollow sealing ring.
In an embodiment of the invention, the expansion type hollow seal ring comprises a first seal ring and a second seal ring, wherein the first seal ring seals a gap between the valve body and the valve core, and the second seal ring seals a gap between the ball inlet channel outlet/ball outlet channel inlet/high pressure air channel outlet and the valve core.
In an embodiment of the present invention, the expansion type hollow seal ring is a rubber hollow seal ring.
In one embodiment of the invention, a metal net is arranged in the rubber hollow sealing ring.
A sealing method of a low-high pressure switching valve comprises the steps of leading high-pressure air out of a high-pressure air channel, decompressing and shunting through a decompressing device to serve as an inflation air source, inflating the inflation air source into an expansion type hollow sealing ring, and sealing a gap between a valve body and a valve core by utilizing the expansion type hollow sealing ring.
A sealing method of a low-high pressure switching valve is characterized in that gas leaked between the valve body and the valve core is used as an inflation gas source, the inflation gas source is inflated into the expansion type hollow sealing ring, and a gap between the valve body and the valve core is sealed in a self-adaptive mode by using the expansion type hollow sealing ring.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
according to the embodiment of the invention, the expansion type hollow sealing ring is arranged between the valve body and the valve core of the low-high pressure conversion valve, the PLC, the electric control pressure reducing valve and the shunt are matched with each other, so that the air pressure in the expansion type hollow sealing ring is actively compensated, the expansion type hollow sealing ring is expanded to realize the sealing between the valve body and the valve core, and the gap between the valve cores of the valve body is communicated with the inside of the expansion type hollow sealing ring through the mutual matching of the communication hole on the valve body and the air tap on the expansion type hollow sealing ring, so that the air pressure in the expansion type hollow sealing ring is automatically compensated, the sealing between the valve body and the valve core is realized, and the air leakage problem between the valve body and the valve core of the low-high pressure conversion valve is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a low-medium high pressure switching valve according to an embodiment of the present invention;
FIG. 2 is a schematic view of a second seal ring of a middle-low high pressure switching valve according to an embodiment of the present invention mounted on an inner wall of a valve body;
fig. 3 is a schematic diagram of a valve core, a first sealing ring and a second sealing ring of the middle-low high pressure switching valve with a valve body omitted in the first embodiment of the invention;
FIG. 4 is a schematic diagram of a spool of a low-to-medium pressure switching valve according to an embodiment of the present invention in a first state;
FIG. 5 is a schematic diagram of a spool of a low-to-medium pressure switching valve according to an embodiment of the present invention in a second state;
fig. 6 is a schematic diagram of a communication hole of a valve body of a low-and-medium-pressure switching valve according to a second embodiment of the present invention.
Icon: 1-valve body, 11-ball inlet channel, 111-ball inlet channel outlet, 12-ball outlet channel, 121-ball outlet channel inlet, 13-high pressure gas channel, 131-high pressure gas channel outlet, 2-valve core, 21-switching channel, 211-first channel, 212-second channel, 31-first sealing ring, 32-second sealing ring, 41-split row and 5-communication hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the azimuth or positional relationship indicated by the terms "inner", "outer", etc. appears to be based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "configured," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1, the present embodiment provides an automatic compensation sealing low-high pressure switching valve, which includes a valve body 1 and a valve core 2 rotatably disposed in the valve body 1, wherein in the embodiment, the valve body 1 is of a hollow cylinder structure, the valve body 1 is provided with a ball inlet channel 11, a ball outlet channel 12 and a high pressure air channel 13, the ball inlet channel 11 and the ball outlet channel 12 are coaxially disposed, and the ball inlet channel 11, the ball outlet channel 12 and the high pressure air channel 13 are mutually spaced by 90 °. In this embodiment, the valve core 2 has a cylindrical structure, and the valve core 2 is driven to rotate by a driving device such as a motor or a hydraulic motor or a pneumatic motor located outside the valve body 1. Referring to fig. 4 and 5, an L-shaped switching channel 21 is provided in the valve core 2, the switching channel 21 includes a first channel 211 and a second channel 212 that are mutually communicated, when the gas lift ball is put into the low-high pressure switching valve, the valve core 2 is in a first state, i.e. the first channel 211 is aligned with the ball inlet channel 11 of the valve body 1, the second channel 212 is closed by the valve body 1, when the gas lift ball is put into the switching channel 21, the driving device drives the valve core 2 to rotate to a second state, i.e. the first channel 211 is aligned with the ball outlet channel 12, the second channel 212 is aligned with the high-pressure gas channel 13, the high-pressure gas in the high-pressure gas channel 13 is introduced into the switching channel 21, the gas lift ball is forced to accelerate to flush out of the switching channel 21 by the high-pressure gas until the ball outlet channel 12, and thereafter the valve core 2 is reset to the first state again, so as to cycle.
Referring to fig. 2 and 3, in the present embodiment, an expansion type hollow sealing ring is fixed on the inner wall of the valve body 1, the expansion type hollow sealing ring includes a first sealing ring 31 and a second sealing ring 32, the first sealing ring 31 is provided with a pair, and seals a gap between the valve body 1 and the valve core 2; the second sealing ring 32 is provided with three sealing rings, which respectively seal the gap between the ball inlet channel outlet 111 and the valve core 2, seal the gap between the ball outlet channel inlet 121 and the valve core 2, and seal the gap between the high-pressure air channel outlet 131 and the valve core 2, so as to prevent high-pressure air from leaking between the valve body 1 and the valve core 2. The expansion hollow sealing ring seals the gap between the valve body 1 and the valve core 2.
As shown in fig. 2, an installation groove for installing the first seal ring 31 and the second seal ring 32 is provided in the valve body 1, and the second seal ring 32 is fixed in the installation groove, so that the second seal ring 32 is prevented from freely moving.
It should be noted that, the first sealing ring 31 and the second sealing ring 32 are both provided with air nozzles for inflating and deflating, and the air nozzles adopt the prior art, so long as the free inflation and deflation of the first sealing ring 31 and the second sealing ring 32 can be realized.
Referring to fig. 1, in this embodiment, a high pressure air channel 13 of a valve body 1 is connected to a pressure reducing device, the pressure reducing device includes an electric control pressure reducing valve (not shown) and a shunt 41, an air pressure detector (not shown) is further connected between the electric control pressure reducing valve and the shunt 41, the electric control pressure reducing valve and the air pressure detector are electrically connected to a control device (not shown), the air pressure detector is a digital display pressure meter in the prior art, the control device is a PLC, the digital display pressure meter detects the output pipeline pressure of the electric control pressure reducing valve in real time, and the control device obtains the detection data of the digital display pressure meter in real time. One end of the electric control pressure reducing valve is communicated with the high-pressure air channel 13, the other end of the electric control pressure reducing valve is communicated with the split flow row 41, and the split flow row 41 is respectively communicated with the first sealing ring 31 and the second sealing ring 32. Because the air pressure in the high-pressure air channel 13 is too high, the high-pressure air is not suitable for being directly led into the first sealing ring 31 and the second sealing ring 32, if the high-pressure air is directly led into the first sealing ring 31 and the second sealing ring 32, the first sealing ring 31 and the second sealing ring 32 can be possibly broken, therefore, the pressure of the led-out air flow is regulated by the electric control pressure reducing valve, so that the first sealing ring 31 and the second sealing ring 32 can be ensured to be normally expanded by a preset expansion amount, the gap between the valve body 1 and the valve core 2 is further sealed, and the first sealing ring 31 and the second sealing ring 32 can be ensured not to be broken.
The PLC controls the electric control pressure reducing valve to increase or decrease the air pressure so as to ensure that the first sealing ring 31 and the second sealing ring 32 keep enough expansion amount and avoid air leakage between the valve body 1 and the valve core 2, thereby realizing the purpose of actively compensating the air pressure in the rubber hollow sealing ring.
In this embodiment, the expansion type hollow sealing ring adopts a rubber hollow sealing ring, and a metal net is arranged in the rubber hollow sealing ring, so that the wear resistance and the service life of the expansion type hollow sealing ring are improved.
Example 2
Referring to fig. 6, the present embodiment provides another low-high pressure switching valve with automatic compensation sealing, which is different from embodiment 1 in that the automatic compensation of the air pressure in the rubber hollow sealing ring can be achieved, specifically as follows:
the valve body 1 of this embodiment is provided with a communication hole 5, one end of the communication hole 5 is communicated with the inner cavity of the valve body 1, the other end of the communication hole 5 is communicated with the expansion hollow sealing ring, that is, the air nozzles of the first sealing ring 31 and the second sealing ring 32 are communicated with the inner cavity of the valve body 1 through the communication hole 5. In the present embodiment, when the valve is initially used, the valve body 1 and the valve element 2 are kept airtight by the sealing of the expansion type hollow seal ring. When the low-high pressure conversion valve is used for a period of time, and the gap between the valve core 2 and the expansion type hollow sealing ring is increased due to abrasion, part of high-pressure air leaks into the inner cavity of the valve body 1 through the gap, then enters the expansion type hollow sealing ring through the communication hole 5, and the expansion type hollow sealing ring synchronously expands along with the increase of the leakage amount of the high-pressure air, so that the effect of self-adapting gap of the expansion type hollow sealing ring is achieved, the expansion amount of the expansion type hollow sealing ring is self-adapting adjusted, and the purpose of automatically compensating the air pressure in the rubber hollow sealing ring is achieved.
Example 3
The sealing method of the low-high pressure switching valve according to embodiment 1 is characterized in that high-pressure air is led out from the high-pressure air channel 13, and is used as an inflation air source after being decompressed and split by the electric control decompression valve and the split flow row 41, the inflation air source is inflated into the first sealing ring 31 and the second sealing ring 32, the air pressure in the rubber hollow sealing ring is actively compensated, the gap between the valve body 1 and the valve core 2 is sealed by the first sealing ring 31 and the second sealing ring 32, and the air leakage problem between the valve body 1 and the valve core 2 of the low-high pressure switching valve due to the leakage of the low-high pressure air is solved.
Example 4
The sealing method of the low-high pressure switching valve according to embodiment 2 uses the gas leaked between the valve body 1 and the valve core 2 as an inflation gas source, the inflation gas source is inflated into the first sealing ring 31 and the second sealing ring 32, so as to automatically compensate the air pressure in the rubber hollow sealing ring, and the gap between the valve body 1 and the valve core 2 is adaptively sealed by using the expansion hollow sealing ring, so that the air leakage problem between the valve body 1 and the valve core 2 of the low-high pressure switching valve is solved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The automatic compensating and sealing low-high pressure converting valve includes valve body and valve core set inside the valve body, and features that the valve body has inner wall with expansion hollow sealing ring to seal the gap between the valve body and the valve core.
2. The self-compensating sealed low-high pressure diverter valve of claim 1, wherein the high pressure gas passage of the valve body is in communication with a pressure relief device having a low pressure output in communication with the inflatable hollow seal ring.
3. The self-compensating sealed low-high pressure switching valve of claim 2, wherein the expanding hollow seal ring comprises a first seal ring sealing a gap between the valve body and the spool and a second seal ring sealing a gap between the ball inlet channel outlet/ball outlet channel inlet/high pressure gas channel outlet and the spool.
4. The self-compensating sealed low-high pressure transfer valve of claim 3, wherein said pressure relief means comprises an electrically controlled pressure relief valve having one end in communication with said high pressure gas passage and a split row having the other end in communication with said split row, said split row in communication with said first and second seal rings, respectively.
5. The self-compensating sealed low-high pressure switching valve of claim 1, wherein the valve body is provided with a communication hole, one end of the communication hole is communicated with the inner cavity of the valve body, and the other end of the communication hole is communicated with the expansion hollow sealing ring.
6. The self-compensating sealed low-high pressure switching valve of claim 5, wherein the expanding hollow seal ring comprises a first seal ring sealing a gap between the valve body and the spool and a second seal ring sealing a gap between the ball inlet channel outlet/ball outlet channel inlet/high pressure gas channel outlet and the spool.
7. The self-compensating sealed low-high pressure diverter valve of claim 1, wherein the expanding hollow seal is a rubber hollow seal.
8. The self-compensating sealed low-high pressure diverter valve according to claim 7 wherein a metal mesh is disposed within the rubber hollow seal.
9. A method of sealing a low-high pressure switching valve as claimed in any one of claims 2 to 4, wherein high pressure gas is led from said high pressure gas passage and is split by decompression of said decompression means as an inflation source, the inflation source is inflated into said inflatable hollow seal, and the gap between said valve body and valve core is sealed by the inflatable hollow seal.
10. A method of sealing a low-high pressure switching valve according to any one of claims 5 to 6, wherein the gas leaking between the valve body and the valve core is used as an inflation gas source which inflates the inflatable hollow seal ring with which the gap between the valve body and the valve core is adaptively sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211651660.7A CN116044346A (en) | 2022-12-21 | 2022-12-21 | Automatic compensation sealing low-high pressure switching valve and sealing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211651660.7A CN116044346A (en) | 2022-12-21 | 2022-12-21 | Automatic compensation sealing low-high pressure switching valve and sealing method thereof |
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| CN116044346A true CN116044346A (en) | 2023-05-02 |
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| CN202211651660.7A Pending CN116044346A (en) | 2022-12-21 | 2022-12-21 | Automatic compensation sealing low-high pressure switching valve and sealing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116392709A (en) * | 2023-06-02 | 2023-07-07 | 生一科技(北京)有限公司 | Guide wire and liquid exchange device |
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2022
- 2022-12-21 CN CN202211651660.7A patent/CN116044346A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116392709A (en) * | 2023-06-02 | 2023-07-07 | 生一科技(北京)有限公司 | Guide wire and liquid exchange device |
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