CN216240541U - One-way constant pressure bleed valve of type that prevents frostbite - Google Patents
One-way constant pressure bleed valve of type that prevents frostbite Download PDFInfo
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- CN216240541U CN216240541U CN202122773063.9U CN202122773063U CN216240541U CN 216240541 U CN216240541 U CN 216240541U CN 202122773063 U CN202122773063 U CN 202122773063U CN 216240541 U CN216240541 U CN 216240541U
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Abstract
The utility model belongs to the technical field of oil exploitation instruments and discloses an anti-freezing one-way constant-pressure air release valve.A sealing valve rod is arranged in a valve body and is in sliding fit and sealing with the valve body; the lower end of the sealing valve body is processed with a taper sealing surface which is in sealing fit with the left end of the valve core; the left end of the valve body is in threaded connection with a fixed sleeve, the left end of the sealing valve rod is sleeved in the fixed sleeve, and the right end of the sealing valve rod is sleeved in the valve body; the side surface of the fixed sleeve is connected with an air inlet short joint through taper threads, the left end of the fixed sleeve is connected with an adjusting nut through threads, and the outer sides of the fixed sleeve and the adjusting nut are coated with a polymer heat collecting sleeve. In the utility model, enough annular space is reserved in the high-molecular heat-gathering sleeve additionally arranged outside, and a layer of cold-insulation heat-preservation sleeve is formed on the device in cold weather in winter; the main structure is completely arranged inside an oil production wellhead pipeline by adopting plug-in installation, so that heat exchange and freeze blockage prevention are realized.
Description
Technical Field
The utility model belongs to the technical field of oil exploitation instruments, and particularly relates to an anti-freezing one-way constant-pressure air release valve.
Background
At present, in the oil field exploitation operation, in order to guarantee the energy make full use of, can retrieve the crude oil associated gas of gathering in the oil jacket annular space in the pit, the application of this associated gas recovery technology, effective energy saving protects the environment, still can control the casing internal pressure simultaneously, helps improving oil pumping efficiency.
In order to achieve the purpose of recovering crude oil associated gas in a casing, a casing gas recovery device is usually installed on an oil production wellhead of an oil field, but the following two problems exist in view of the devices commonly adopted in various oil fields at present: most of the device leaks into the outside air, and the device is very easy to freeze in cold weather, so that the valve core is frozen and blocked, the product function is invalid, and even more, the crude oil flows back to the bottom of the well along the air inlet of the casing recovery device; the latus rectum is general less, and the inside gas space that holds of device is not enough, and the displacement can not reach actual demand, leads to oil pressure and casing pressure unbalance, influences oil recovery efficiency, and the oil recovery well 'gas lock' phenomenon appears more.
Therefore, it is necessary to provide a new anti-freezing type one-way constant pressure relief valve, which solves the above-mentioned problems and drawbacks of the prior art.
Through the above analysis, the problems and defects of the prior art are as follows:
(1) the existing casing gas recovery device on the oil production well head is very easy to freeze in cold weather, so that a valve core is frozen and blocked, the product function is invalid, and even more, crude oil flows back to the well bottom along an air inlet of the casing gas recovery device.
(2) The oil pressure and the casing pressure are easy to be unbalanced, the oil extraction efficiency is influenced, and the 'gas lock' phenomenon of an oil extraction well is easy to occur.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides an anti-freezing one-way constant-pressure air release valve.
The utility model is realized in this way, an anti-freezing one-way constant pressure air release valve is provided with:
a valve body and a valve core;
a sealing valve rod is arranged in the valve body in a sliding mode, and a taper sealing surface is processed at the lower end of the sealing valve rod;
the left end of the valve body is in threaded connection with a fixed sleeve, a sealing valve rod is slidably mounted in the fixed sleeve, and the right end of the sealing valve rod is sleeved in the valve body;
the fixed cover side has the nipple joint of admitting air through taper threaded connection, fixed cover left end has adjusting nut through threaded connection, the cladding of fixed cover and adjusting nut outside has the polymer to gather hot cover.
Further, a spring is sleeved on the outer side of the right end of the valve core, a spring seat is connected to the right end of the spring, and the spring seat is connected to the right end of the valve body through threads.
Furthermore, a combined sealing gasket is clamped between the left end of the valve body and the fixed sleeve.
Further, two sealing rings are installed on the outer side of the sealing valve rod, and the outer sides of the two sealing rings are respectively abutted against the inner wall of the fixed sleeve and the inner wall of the valve body.
Furthermore, pressure value marks are marked on the outer circle of the fixed sleeve, and indicating marked lines corresponding to the pressure value marks are marked on the outer side of the adjusting nut.
Furthermore, the lower end of the fixed sleeve is provided with a taper thread which is matched with the thread of the oil production wellhead pipeline and is provided with a seal.
Further, the sealing valve rod and the valve core are both made of 304 stainless steel plastids.
Further, the minimum through diameter of the sealing valve rod is DN 20.
By combining all the technical schemes, the utility model has the advantages and positive effects that:
the high polymer heat-collecting sleeve is additionally arranged outside the device, the high polymer raw material has heat absorption, heat insulation and heat preservation performances, enough annular space is reserved inside the device after processing, and a layer of cold-insulation heat-preservation sleeve is formed on the device in cold weather in winter, so that the anti-freezing performance is greatly improved.
The utility model can adopt 'plug-in' installation by changing the appearance structure, and the main structure is completely installed in the oil production wellhead pipeline, and heat exchange and anti-freezing blockage are carried out through the self heat and fluidity of the crude oil; and the air inlet short section is arranged at the side end of the body and is close to the crude oil conveying pipe to the minimum extent, and the flowing heat exchange of the crude oil is carried out to reach the air inlet so as to reduce the possibility of freezing and blocking.
According to the utility model, the diameter of the air passing hole of the device is increased, so that the gas transmission efficiency is ensured while the sealing and the interchangeable installation are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an anti-freezing type one-way constant pressure relief valve provided by an embodiment of the utility model.
Fig. 2 is a schematic diagram of the connection of the anti-freezing type one-way constant pressure release valve provided by the embodiment of the utility model.
Fig. 3 is a schematic connection diagram of a ball valve according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the reducing tee according to the embodiment of the present invention.
In the figure: 1. a polymer heat-gathering sleeve; 2. adjusting the nut; 3. fixing a sleeve; 4. an air inlet short section; 5. a sealing valve stem; 6. a combination seal gasket; 7. a seal ring; 8. a valve body; 9. a valve core; 10. a compression spring; 11. a spring seat; 12. a reducing tee; 13. a threaded nipple; 14. a ball valve; 15. connecting short sections; 16. an air hose.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Aiming at the problems in the prior art, the utility model provides an anti-freezing one-way constant pressure air release valve, which is described in detail below with reference to the attached drawings.
As shown in fig. 1, the anti-freezing type one-way constant pressure relief valve provided by the embodiment of the utility model comprises a polymer heat collecting sleeve 1, an adjusting nut 2, a fixing sleeve 3, an air inlet short section 4, a sealing valve rod 5, a combined sealing gasket 6, a sealing ring 7, a valve body 8, a valve core 9, a compression spring 10 and a spring seat 11.
The adjusting nut 2 is in threaded connection with the fixed sleeve 3 through threads, the side face of the fixed sleeve 3 is connected with the air inlet short section 4 through tapered threads, the sealing valve rod 5 is slidably installed inside the fixed sleeve 3, and two sealing rings 7 are installed on the sealing valve rod 5; the right end of the fixed sleeve 3 is in threaded connection with a valve body 8, and the valve body 8 is in sealing fit with the fixed sleeve 3 by pressing the combined sealing gasket 6; a sealing valve rod 5 is arranged in the valve body 8 in a sliding mode, and a taper sealing surface is processed at the lower end of the sealing valve rod 5; a compression spring 10 is sleeved outside the right end of the valve core 9, and the right end of the compression spring 10 is sleeved at the left end of a spring seat 11; the spring seat 11 is connected with the valve body 8 through threads;
the right end of the fixed sleeve 3 is provided with a taper thread with a seal, the thread is matched with the thread of the oil extraction wellhead pipeline, all parts below the thread at the lower end of the fixed sleeve 3 sink into the oil extraction wellhead pipeline after on-site installation, and the valve core part is ensured not to freeze through the flowing heat exchange of crude oil;
preferably, the excircle of the fixed sleeve 3 is marked with a pressure numerical identifier, and the outer side of the adjusting nut 2 is marked with an indicating marking corresponding to the pressure numerical identifier.
Preferably, the air inlet short joint 4 is arranged at the side end of the fixed sleeve 3 and is as close to the lower end of the fixed sleeve 3 as possible, so that the connection is convenient, and meanwhile, heat transferred by partial crude oil can be received, and the freezing possibility is reduced;
preferably, the materials of the sealing valve rod 5 and the valve core 9 are 304 stainless steel, so that the sealing service life is prolonged;
preferably, the minimum diameter of the sealing valve rod 5 is DN20 to ensure enough capacity and air passing amount.
As shown in fig. 2 to 4, when the gas-liquid separator is used, the gas-liquid separator is matched with a reducing tee 12, a threaded nipple 13, a ball valve 14, a connecting nipple 15 and a gas hose 16, the outer end of the gas inlet nipple 4 is connected with the gas hose 16, the other end of the gas hose 16 is connected with the ball valve 14 through the connecting nipple 15, the other end of the ball valve 14 is connected with the reducing tee 12 through the threaded nipple 13, and the reducing tee 12 is installed at a gas outlet of a casing of a production wellhead through threads. After integral installation, setting required opening pressure, opening the ball valve 14, and allowing crude oil associated gas in the wellhead casing to enter a reducing tee on the anti-freezing type one-way constant-pressure deflation valve through the wellhead casing tee and enter the gas sleeving valve through a gas transmission pipeline of the anti-freezing type one-way constant-pressure deflation valve; when the wellhead back pressure is less than the internal pressure of the sleeve and the internal pressure of the sleeve is less than the set opening pressure of the sleeve valve, the sleeve gas valve is closed, and crude oil associated gas in the sleeve cannot enter an oil pipeline to form oil-gas mixed transportation; when the well mouth back pressure is larger than the internal pressure of the sleeve, the sleeve gas valve is closed, and the crude oil associated gas in the sleeve cannot enter the oil pipeline to form oil-gas mixed transportation; and under the closing state of the gas trap, the crude oil associated gas is isolated from the crude oil, the crude oil associated gas cannot enter an oil pipeline, and the crude oil cannot flow back into the sleeve.
When the opening pressure of the valve core 9 needs to be adjusted on site, only the high-molecular heat-gathering sleeve 1 needs to be dismounted, and the adjusting nut 2 needs to be rotated until the marked line points to the required pressure value; at this time, under the action of the adjusting nut 2, the sealing valve rod 5 is pressed, the sealing valve rod 5 compresses or releases the valve core 9 through sliding, and compresses or releases the compression spring 10 through the valve core 9, so as to achieve the purpose of adjusting the elastic force of the spring. In the whole process, due to the sealing effect of the sealing ring 7 and the combined sealing gasket 6, the product does not need to be disassembled, can be operated under pressure, and ensures the operation safety.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the utility model, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the utility model as defined by the appended claims.
Claims (8)
1. The utility model provides a one-way constant pressure bleed valve of type that prevents frostbite, its characterized in that, one-way constant pressure bleed valve of type that prevents frostbite is provided with:
a valve body and a valve core;
a sealing valve rod is arranged in the valve body in a sliding mode, and a taper sealing surface is processed at the lower end of the sealing valve rod;
the left end of the valve body is in threaded connection with a fixed sleeve, a sealing valve rod is slidably mounted in the fixed sleeve, and the right end of the sealing valve rod is sleeved in the valve body;
the fixed cover side has the nipple joint of admitting air through taper threaded connection, fixed cover left end has adjusting nut through threaded connection, the cladding of fixed cover and adjusting nut outside has the polymer to gather hot cover.
2. The anti-freezing one-way constant pressure relief valve as claimed in claim 1, wherein a spring is sleeved outside the right end of the valve core, a spring seat is connected to the right end of the spring, and the spring seat is connected to the right end of the valve body through a thread.
3. The antifreeze one-way constant pressure release valve as claimed in claim 1, wherein a combined sealing gasket is clamped between the left end of the valve body and the fixed sleeve.
4. The antifreeze one-way constant pressure bleed valve as claimed in claim 1, wherein two sealing rings are mounted on the outside of said sealing valve stem, and the outside of the two sealing rings respectively abut against the inner wall of the fixed sleeve and the inner wall of the valve body.
5. The anti-freezing one-way constant pressure air release valve as claimed in claim 1, wherein a pressure value mark is marked on the outer circle of the fixed sleeve, and an indicating mark corresponding to the pressure value mark is marked on the outer side of the adjusting nut.
6. The anti-freezing one-way constant pressure relief valve as claimed in claim 1, wherein the lower end of said fixed sleeve is provided with a taper thread with a seal matching with the thread of the oil production wellhead pipeline.
7. The antifreeze one-way constant pressure bleed valve as recited in claim 1, wherein said sealing valve stem and said valve plug are both made of 304 stainless steel material.
8. The antifreeze one-way constant pressure purge valve as claimed in claim 1, wherein said sealing valve stem has a minimum diameter of DN 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122773063.9U CN216240541U (en) | 2021-11-12 | 2021-11-12 | One-way constant pressure bleed valve of type that prevents frostbite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122773063.9U CN216240541U (en) | 2021-11-12 | 2021-11-12 | One-way constant pressure bleed valve of type that prevents frostbite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216240541U true CN216240541U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122773063.9U Active CN216240541U (en) | 2021-11-12 | 2021-11-12 | One-way constant pressure bleed valve of type that prevents frostbite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216240541U (en) |
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2021
- 2021-11-12 CN CN202122773063.9U patent/CN216240541U/en active Active
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