CN111608635A - Gas field wellhead throttling and pressure reducing device and method based on vortex tube effect - Google Patents
Gas field wellhead throttling and pressure reducing device and method based on vortex tube effect Download PDFInfo
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- CN111608635A CN111608635A CN202010305342.XA CN202010305342A CN111608635A CN 111608635 A CN111608635 A CN 111608635A CN 202010305342 A CN202010305342 A CN 202010305342A CN 111608635 A CN111608635 A CN 111608635A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000000694 effects Effects 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 80
- 239000003381 stabilizer Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 239000003345 natural gas Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 13
- 230000003068 static effect Effects 0.000 abstract description 12
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000008358 core component Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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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
- E21B43/34—Arrangements for separating materials produced by the well
-
- 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
-
- 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
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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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to the field of gas field wellhead throttling depressurization technology, and designs and utilizes a unique flow field structure with a radial static temperature pressure gradient inside a vortex tube and a gradually increased axial static temperature of a hot end tube. A gas field wellhead throttling and pressure reducing device based on vortex tube effect comprises an integrated cabinet, an air inlet pipeline connected with the inlet end of the integrated cabinet, a liquid collecting pipeline and a gas collecting pipeline connected with the outlet end of the integrated cabinet; the device also comprises a vortex tube; a primary throttling and pressure reducing device is arranged inside the integrated cabinet and comprises a plurality of vortex tubes which are arranged in parallel; the air inlet pipeline is connected with the inlet end of the vortex tube through the reducer pipe respectively; the wellhead throttling and pressure reducing process developed by using the vortex tube as a core component can effectively avoid a series of technical difficulties that the underground restrictor is easy to lose effectiveness and difficult to salvage, the wellhead heating energy consumption is high, the unattended risk is large and the like, can obviously improve the social and economic benefits, plays a role in saving energy consumption, and promotes the gas field ground gathering and transportation technology to be developed forward.
Description
Technical Field
The invention belongs to the field of gas field wellhead throttling depressurization technology, and designs and utilizes a unique flow field structure with a radial static temperature pressure gradient inside a vortex tube and a gradually increased axial static temperature of a hot end tube.
Background
The natural gas field underground throttling process is a new process which is popularized for economic and effective development in recent years, and is adopted for prolonging petroleum delay gas 2-delay 128 well regions and delay 145 well regions, so that the process not only can effectively utilize formation energy for rewarming, realize throttling and depressurization of a shaft, but also can obviously simplify a gas gathering station process and reduce ground construction investment. However, for sulfur-containing gas fields, due to the corrosivity of hydrogen sulfide, the reliability and stability of the downhole choke are difficult to guarantee, and the downhole choke is difficult to repair, maintain and salvage, so that certain safety risks are caused.
Therefore, the sulfur-containing gas field generally does not adopt downhole throttling, and usually adopts a surface throttling process. However, the traditional ground throttling gathering and transportation process is generally more complex and has higher investment due to the need of heating and throttling.
In conclusion, if a set of novel efficient and energy-saving gas field wellhead throttling device which is simple in structure and does not need heating can be explored and invented, throttling and depressurization of a gas field wellhead can be realized, and hydrate freezing and blocking can not occur, the device has very important significance and value for the promotion of a gas field ground gathering and transportation process technology.
The vortex tube is an energy separating device with simple structure, which is composed of a nozzle, a vortex chamber, a separating orifice plate and a cold-hot end tube, as shown in figure 1, when in use, compressed gas expands in the nozzle and then enters the vortex tube at high speed along the tangential direction. When the airflow rotates at high speed in the vortex tube, the airflow is separated into two parts of airflow with unequal temperatures after vortex conversion, obvious pressure gradients are generated in the radial direction and the axial direction, and the proportion of cold flow and hot flow can be adjusted according to the requirements of application examples, so that the optimal refrigeration effect or heating effect is obtained.
Disclosure of Invention
The invention aims to solve the problems and provides a device for realizing the throttling and pressure reduction of a gas field wellhead on the premise of not heating the wellhead and not generating hydrates by utilizing a unique flow field structure that the radial static temperature pressure gradient inside a vortex tube and the axial static temperature of a hot end tube are gradually increased.
The technical scheme of the invention is as follows:
a gas field wellhead throttling and pressure reducing device based on vortex tube effect comprises an integrated cabinet, an air inlet pipeline connected with the inlet end of the integrated cabinet, a liquid collecting pipeline and a gas collecting pipeline connected with the outlet end of the integrated cabinet;
the vortex tube comprises a vortex chamber, and a cold end tube and a hot end tube which are respectively positioned at two ends of the vortex chamber and are communicated with the vortex chamber; the outlet ends of the cold end pipe and the hot end pipe are both connected with expansion pipes which are respectively a cold end expansion pipe and a hot end expansion pipe; the inlet end of the vortex chamber is connected with a reducer pipe; a shell-and-tube heat exchanger communicated with the cold end tube is arranged around the joint of the cold end tube and the vortex tube; the hot end expansion pipe is also connected with the shell-and-tube heat exchanger through a heat tracing pipeline;
a primary throttling and pressure reducing device is arranged inside the integrated cabinet and comprises a plurality of vortex tubes which are arranged in parallel; the air inlet pipeline is connected with the inlet end of the vortex tube through the reducer pipe respectively, and the diameter of the reducer pipe is in a reduction trend along the air inlet direction of the air inlet pipeline;
the integrated cabinet further comprises a primary converging system positioned outside the integrated cabinet, wherein the primary converging system comprises a first heat exchanger, a first pressure stabilizer and a first gas-liquid separator which are sequentially connected; the hot end expansion pipes are connected to the first voltage stabilizer, and the cold end expansion pipes are connected to the first heat exchanger; the gas outlet end of the first gas-liquid separator is connected with the gas collecting pipeline, and the liquid outlet end of the first gas-liquid separator is connected with the liquid collecting pipeline.
The secondary throttling and pressure reducing device is positioned in the integrated cabinet, and the secondary converging system is positioned outside the integrated cabinet; the secondary throttling and depressurizing device comprises vortex tubes which are the same as the primary throttling and depressurizing device in number and structure; the secondary converging system comprises a second heat exchanger, a second voltage stabilizer and a second gas-liquid separator which are connected in sequence; the outlet end of the first gas-liquid separator is connected with the inlet end of a vortex tube in the secondary throttling and pressure reducing device through a reducer pipe; similarly, in the secondary throttling and pressure reducing device, the hot end expansion pipes are connected to the second pressure stabilizer, and the cold end expansion pipes are connected to the second heat exchanger; the gas outlet end of the second gas-liquid separator is connected with the gas collecting pipeline, and the liquid outlet end of the first gas-liquid separator and the liquid outlet end of the second gas-liquid separator are both connected with the liquid collecting pipeline.
The gas-liquid separator is characterized by further comprising a third gas-liquid separator, wherein the gas outlet end of the third gas-liquid separator is connected with the gas inlet pipeline, and the liquid outlet end of the third gas-liquid separator is connected with the liquid collecting pipeline.
And 4 vortex tubes are arranged in the primary throttling and pressure reducing device and the secondary throttling and pressure reducing device.
And a safety valve is also arranged on the air inlet pipeline.
And the connecting pipelines from the hot end expansion pipe to the shell-and-tube heat exchanger, the first voltage stabilizer and the second voltage stabilizer are all provided with heat insulation layers.
A gas field wellhead throttling and pressure reducing method based on a vortex tube effect uses the gas field wellhead throttling and pressure reducing device based on the vortex tube effect, and comprises the following steps:
1) the natural gas from the well head enters a third gas-liquid separator, the gas phase enters a primary throttling and pressure reducing device in the gas collecting cabinet through an air inlet pipeline to perform primary throttling and pressure reduction: performing cold-heat separation in the vortex tube to separate out free water, leading the free water out into a first voltage stabilizer along with high-temperature gas through a hot end expansion tube and a hot end header pipe, conveying the other part of the high-temperature gas to a tube shell heat exchanger through a heat tracing pipeline to perform heat tracing on a cold end tube, mixing the high-temperature gas and the low-temperature gas in the cold end tube, connecting the mixed gas and the low-temperature gas into the first heat exchanger through a cold end header pipe, mixing cold and heat flows in the first voltage stabilizer to perform rewarming, feeding the rewarmed gas flow into a first gas-liquid separator, and feeding the free water into a liquid collecting pipeline; the airflow without the free water enters the integrated cabinet again and is subjected to secondary throttling and pressure reduction through a secondary throttling and pressure reduction device;
2) during the secondary throttling depressurization, the free water enters a liquid collecting pipeline, and the airflow after the free water is removed enters a gas collecting pipeline.
The cold-flow ratio of the cold-heat separation is 1: 2.
The invention has the technical effects that:
the wellhead throttling and pressure reducing process developed by using the vortex tube as a core component can effectively avoid a series of technical difficulties that the underground restrictor is easy to lose effectiveness and difficult to salvage, the wellhead heating energy consumption is high, the unattended risk is large and the like, can obviously improve the social and economic benefits, plays a role in saving energy consumption, and promotes the gas field ground gathering and transportation technology to be developed forward.
Drawings
FIG. 1 is a schematic diagram of a vortex tube in the prior art.
FIG. 2 is a schematic structural diagram of a gas field wellhead throttling and pressure reducing device based on a vortex tube effect.
FIG. 3 is a schematic diagram of the vortex tube of the present invention.
Reference numerals: the heat exchanger comprises a variable diameter pipe 1, a pipe shell heat exchanger 2, a vortex chamber 3, a hot end expansion pipe 4, a cold end expansion pipe 5, a first heat exchanger 6, a first pressure stabilizer 7, a first gas-liquid separator 8, a second heat exchanger 9, a second pressure stabilizer 10, a second gas-liquid separator 11, a third gas-liquid separator 12, a liquid collecting tank 13, a cold end header pipe 14, a hot end header pipe 15 and a safety valve 16.
Detailed Description
Example 1
A gas field wellhead throttling and pressure reducing device based on vortex tube effect comprises an integrated cabinet, an air inlet pipeline connected with the inlet end of the integrated cabinet, a liquid collecting pipeline and a gas collecting pipeline connected with the outlet end of the integrated cabinet;
the vortex tube comprises a vortex chamber 3, and a cold end tube and a hot end tube which are respectively positioned at two ends of the vortex chamber 3 and are communicated with the vortex chamber 3; the outlet ends of the cold end pipe and the hot end pipe are both connected with expansion pipes, namely a cold end expansion pipe 5 and a hot end expansion pipe 4; the inlet end of the vortex chamber 3 is connected with a reducer pipe 1 for improving the air inlet flow rate and improving the cold and hot separation performance of the vortex pipe; a shell-and-tube heat exchanger 2 communicated with the cold end tube is arranged around the joint of the cold end tube and the vortex tube; the hot end expansion pipe 4 is also connected with the shell-and-tube heat exchanger 2 through a heat tracing pipeline;
a primary throttling and pressure reducing device is arranged inside the integrated cabinet and comprises a plurality of vortex tubes which are arranged in parallel; the air inlet pipeline is respectively connected with the inlet end of the vortex tube through the reducer pipe 1, and the diameter of the reducer pipe 1 is reduced along the air inlet direction of the air inlet pipeline;
the system also comprises a primary converging system positioned outside the integrated cabinet, wherein the primary converging system comprises a first heat exchanger 6, a first pressure stabilizer 7 and a first gas-liquid separator 8 which are sequentially connected; the hot end expansion pipes 4 are connected to a first voltage stabilizer 7, and the cold end expansion pipes 5 are connected to a first heat exchanger 6; the gas outlet end of the first gas-liquid separator 8 is connected with a gas collecting pipeline, the liquid outlet end of the first gas-liquid separator is connected with a liquid collecting pipeline, and the liquid collecting pipeline is connected with a liquid collecting tank 13.
The specific implementation process of the embodiment is as follows:
natural gas at the wellhead respectively enters each vortex tube through an air inlet pipeline, high-pressure gas entering the vortex tubes is subjected to cold-hot separation in the vortex chamber 3, free water is separated out in the vortex chamber 3 due to static temperature reduction, the separated water is thrown to a high-temperature wall surface under the action of strong vortex flow in the vortex chamber 3 and flows out of the hot end expansion tube 4 along with the high-temperature gas; after the flow rate is reduced and the static temperature and the static pressure are improved in the hot end expansion pipe 4, a part of the mixture is led out to the first voltage stabilizer 7 through the hot end main pipe 15; the other part of high-temperature gas is conveyed to the shell-and-tube heat exchanger 2 through a heat tracing pipeline, enters through the upper shell pass of the shell-and-tube heat exchanger 2, flows out of the lower shell pass to perform heat tracing on a cold end pipe, is guided out of the lower shell pass to the cold end pipe to be mixed with the low-temperature gas, is subjected to pressure expansion by a cold end expansion pipe 5 to improve static pressure and static temperature, then is converged into a cold end header pipe 14 to be guided out to the first heat exchanger 6, exchanges heat with air to improve the static temperature, and then also enters into a first voltage stabilizer 7; mixing the mixture with high-temperature gas in a first voltage stabilizer 7 for rewarming; the gas flow after rewarming enters a first gas-liquid separator 8, the free water enters a liquid collecting pipeline, and the gas enters a gas collecting pipeline.
Example 2
On the basis of embodiment 1, the method further comprises the following steps:
the secondary throttling and pressure reducing device is positioned in the integrated cabinet, and the secondary converging system is positioned outside the integrated cabinet; the secondary throttling and depressurizing device comprises vortex tubes which are the same as the primary throttling and depressurizing device in number and structure; the secondary converging system comprises a second heat exchanger 9, a second voltage stabilizer 10 and a second gas-liquid separator 11 which are connected in sequence; wherein, the outlet end of the first gas-liquid separator 8 is connected with the inlet end of a vortex tube in the secondary throttling and pressure reducing device through a reducer pipe 1; similarly, in the secondary throttling pressure reduction device, the hot end expansion pipes 4 are connected to a second pressure stabilizer 10, and the cold end expansion pipes 5 are connected to a second heat exchanger 9; the gas outlet end of the second gas-liquid separator 11 is connected with a gas collecting pipeline, and the liquid outlet end of the first gas-liquid separator 8 and the liquid outlet end of the second gas-liquid separator 11 are both connected with a liquid collecting pipeline.
The specific implementation process of the embodiment is as follows:
the gas outlet end of the first gas-liquid separator 8 is not connected with a gas collecting pipeline any more, and is directly introduced into a vortex tube in a secondary throttling and pressure reducing device in the integrated cabinet for secondary throttling and pressure reduction; the throttling depressurization process is the same as that of the embodiment 1; the gas flow after the secondary throttling and pressure reduction enters the second gas-liquid separator 11, the free water enters the liquid collecting pipeline, and the gas enters the gas collecting pipeline.
Example 3
On the basis of embodiment 2, the method further comprises the following steps:
the gas-liquid separator further comprises a third gas-liquid separator 12, wherein the gas outlet end of the third gas-liquid separator 12 is connected with a gas inlet pipeline, and the liquid outlet end of the third gas-liquid separator 12 is connected with a liquid collecting pipeline. The wellhead natural gas firstly enters the third gas-liquid separator 12 to remove part of free water, condensate oil and solid impurities, so that heterogeneous nucleation of natural gas hydrate in the subsequent vortex tube is effectively avoided, and then the natural gas enters the integrated cabinet through the gas inlet pipeline.
Example 4
On the basis of embodiment 3, the method further comprises the following steps: the number of the vortex tubes is 4. And a safety valve 16 is also arranged on the air inlet pipeline, and when equipment in the integrated cabinet fails and causes the pipeline pressure to exceed a set value, the safety valve 16 can automatically bounce open to ensure the safety and reliability of the process flow. And the connecting pipelines from the hot end expansion pipe 4 to the shell-and-tube heat exchanger 2, the first voltage stabilizer 7 and the second voltage stabilizer 10 are all provided with heat insulation layers.
The device of the invention is a commercial product except for the vortex tube. For example, the first gas-liquid separator 8, the second gas-liquid separator 11, and the third gas-liquid separator 12 are each of Φ 400mm × L1726 PN 8 MPA. The first voltage stabilizer 7 and the second voltage stabilizer 10 have a model of Φ 200mm × H800 PN 8 MPA. The first heat exchanger 6 and the second heat exchanger 9 are LRGG-4-3.6 × 2.8/9-5.7.
Claims (8)
1. A gas field wellhead throttling and pressure reducing device based on vortex tube effect comprises an integrated cabinet, an air inlet pipeline connected with the inlet end of the integrated cabinet, a liquid collecting pipeline and a gas collecting pipeline connected with the outlet end of the integrated cabinet; the method is characterized in that:
the vortex tube comprises a vortex chamber (3) and a cold end tube and a hot end tube which are respectively positioned at two ends of the vortex chamber (3) and are communicated with the vortex chamber (3); the outlet ends of the cold end pipe and the hot end pipe are both connected with expansion pipes which are respectively a cold end expansion pipe (5) and a hot end expansion pipe (4); the inlet end of the vortex chamber (3) is connected with a reducer pipe (1); a shell-and-tube heat exchanger (2) communicated with the cold end tube is arranged around the joint of the cold end tube and the vortex tube; the hot end expansion pipe (4) is also connected with the shell-and-tube heat exchanger (2) through a heat tracing pipeline;
a primary throttling and pressure reducing device is arranged inside the integrated cabinet and comprises a plurality of vortex tubes which are arranged in parallel; the air inlet pipeline is connected with the inlet end of the vortex tube through the reducer pipe (1), and the diameter of the reducer pipe (1) is reduced along the air inlet direction of the air inlet pipeline;
the system also comprises a primary converging system positioned outside the integrated cabinet, wherein the primary converging system comprises a first heat exchanger (6), a first pressure stabilizer (7) and a first gas-liquid separator (8) which are sequentially connected; the hot end expansion pipes (4) are connected to a first voltage stabilizer (7), and the cold end expansion pipes (5) are connected to a first heat exchanger (6); the gas outlet end of the first gas-liquid separator (8) is connected with a gas collecting pipeline, and the liquid outlet end of the first gas-liquid separator is connected with a liquid collecting pipeline.
2. The gas field wellhead throttling and pressure reducing device based on the vortex tube effect as claimed in claim 1, wherein: the secondary throttling and pressure reducing device is positioned in the integrated cabinet, and the secondary converging system is positioned outside the integrated cabinet; the secondary throttling and depressurizing device comprises vortex tubes which are the same as the primary throttling and depressurizing device in number and structure; the secondary converging system comprises a second heat exchanger (9), a second voltage stabilizer (10) and a second gas-liquid separator (11) which are connected in sequence; the outlet end of the first gas-liquid separator (8) is connected with the inlet end of a vortex tube in the secondary throttling pressure reduction device through a reducer pipe (1); similarly, in the secondary throttling pressure reduction device, the hot end expansion pipes (4) are connected to a second pressure stabilizer (10), and the cold end expansion pipes (5) are connected to a second heat exchanger (9); the gas outlet end of the second gas-liquid separator (11) is connected with a gas collecting pipeline, and the liquid outlet end of the first gas-liquid separator (8) and the liquid outlet end of the second gas-liquid separator (11) are both connected with a liquid collecting pipeline.
3. The gas field wellhead throttling and pressure reducing device based on the vortex tube effect as claimed in claim 2, wherein: the gas-liquid separator is characterized by further comprising a third gas-liquid separator, wherein the gas outlet end of the third gas-liquid separator (12) is connected with the gas inlet pipeline, and the liquid outlet end of the third gas-liquid separator is connected with the liquid collecting pipeline.
4. The gas field wellhead throttling and pressure reducing device based on the vortex tube effect as claimed in claim 3, wherein: and 4 vortex tubes are arranged in the primary throttling and pressure reducing device and the secondary throttling and pressure reducing device.
5. The gas field wellhead throttling and pressure reducing device based on the vortex tube effect as claimed in claim 4, wherein: and a safety valve (16) is also arranged on the air inlet pipeline.
6. The gas field wellhead throttling and pressure reducing device based on the vortex tube effect as claimed in claim 5, wherein: and heat-insulating layers are arranged on the connecting pipelines from the hot-end expansion pipe (4) to the shell-and-tube heat exchanger (2), the first voltage stabilizer (7) and the second voltage stabilizer (10).
7. A gas field wellhead throttling depressurization method based on a vortex tube effect is characterized in that: the gas field wellhead throttling and depressurizing device based on the vortex tube effect as claimed in claim 6 comprises the following steps:
the natural gas from the well head enters a third gas-liquid separator (12), the gas phase enters a throttling and pressure reducing device in the gas collecting cabinet through an air inlet pipeline to perform throttling and pressure reducing for one time: carrying out cold-heat separation in a vortex tube to separate out free water, leading the free water out into a first voltage stabilizer (7) through a hot end header pipe (15) along with high-temperature gas via a hot end expansion tube (4), conveying the other part of the high-temperature gas to a tube shell heat exchanger (2) through a heat tracing pipeline to carry out heat tracing on a cold end tube, mixing the high-temperature gas with the low-temperature gas in the cold end tube, connecting the mixed gas into a first heat exchanger (6) through a cold end header pipe (14), mixing cold and heat flows in the first voltage stabilizer (7), carrying out rewarming, feeding the rewarmed gas flow into a first gas-liquid separator (8), and feeding the free water into a liquid collecting pipeline; the airflow without the free water enters the integrated cabinet again and is subjected to secondary throttling and pressure reduction through a secondary throttling and pressure reduction device;
during the secondary throttling depressurization, the free water enters a liquid collecting pipeline, and the airflow after the free water is removed enters a gas collecting pipeline.
8. The gas field wellhead throttling and depressurizing method based on the vortex tube effect as claimed in claim 7, characterized in that: the cold-flow ratio of the cold-heat separation is 1: 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305342.XA CN111608635A (en) | 2020-04-17 | 2020-04-17 | Gas field wellhead throttling and pressure reducing device and method based on vortex tube effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305342.XA CN111608635A (en) | 2020-04-17 | 2020-04-17 | Gas field wellhead throttling and pressure reducing device and method based on vortex tube effect |
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| CN111608635A true CN111608635A (en) | 2020-09-01 |
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| CN202010305342.XA Pending CN111608635A (en) | 2020-04-17 | 2020-04-17 | Gas field wellhead throttling and pressure reducing device and method based on vortex tube effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323646A (en) * | 2021-08-04 | 2021-08-31 | 四川凌耘建科技有限公司 | High-pressure buffering sand separation device for wellhead of compact gas well |
| CN113503151A (en) * | 2021-08-06 | 2021-10-15 | 四川凌耘建科技有限公司 | Sand removal and gas production integrated system for tight gas well wellhead and process method thereof |
-
2020
- 2020-04-17 CN CN202010305342.XA patent/CN111608635A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323646A (en) * | 2021-08-04 | 2021-08-31 | 四川凌耘建科技有限公司 | High-pressure buffering sand separation device for wellhead of compact gas well |
| CN113323646B (en) * | 2021-08-04 | 2021-12-14 | 四川凌耘建科技有限公司 | High-pressure buffering sand separation device for wellhead of compact gas well |
| CN113503151A (en) * | 2021-08-06 | 2021-10-15 | 四川凌耘建科技有限公司 | Sand removal and gas production integrated system for tight gas well wellhead and process method thereof |
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