AU2019100015A4 - An Enhanced Gas Lift - Google Patents
An Enhanced Gas Lift Download PDFInfo
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- AU2019100015A4 AU2019100015A4 AU2019100015A AU2019100015A AU2019100015A4 AU 2019100015 A4 AU2019100015 A4 AU 2019100015A4 AU 2019100015 A AU2019100015 A AU 2019100015A AU 2019100015 A AU2019100015 A AU 2019100015A AU 2019100015 A4 AU2019100015 A4 AU 2019100015A4
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Abstract
Abstract This utility model provides an enhanced gas lift, comprised of a pipe string structure installed in a gas well, wherein the pipe string structure is made up of a casing, a 5 tubing and a small diameter pipe string with openings at both ends; the tubing is installed inside the casing, and the small diameter pipe string is installed inside the tubing. This utility model has a simple structure, as the downhole pipe string structure is an orderly assembly comprised only of a casing, a tubing and a small diameter pipe string. Both the lower ends of the tubing and the small diameter pipe string are open, 10 without the need of any downhole tools and can go directly to the bottom hole fluid, thus noted for their wide range of application, convenient installation, simple maintenance and good operation stability. At the same time, the pipeline is not easy clogged, the drainage and production process has a high degree of controllability, and there is no need for NPSH (Net Positive Suction Head), which can minimize bottom 15 hole flowing pressure. This utility model also enables different water production with the same set of equipment through the addition of pipelines and pipeline switching device, which significantly enhances the flexibility of the equipment and expands the scope of application. Fig. 1
Description
Specification
An Enhanced Gas Lift
Technical Field
This utility model belongs to the technical field of gas well exploitation, particularly involving a type of enhanced gas lift.
Background Technology
Gas fossil fuel is an ancient biological remains buried in sedimentary strata and formed through geological processes, mainly including natural gas, coalbed gas and shale gas, among other varieties. The ignition temperature of gas fossil fuels is relatively low, the speed of flame propagation is fast, the speed of combustion is fast, and the combustion is very easy and simple. In addition, it is easy to achieve automatic gas transmission, mixing and combustion process, making it a kind of high-quality, efficient and clean fuel.
At present, the methods of gas fossil fuels extraction mainly include sucker-rod pump, progressive cavity pump, electric submersible pump, gas lift, hydraulic jet pump, foam method and optimal pipe string method. These extraction methods have many technical problems such as large investment in equipment, high requirements on equipment, poor capacity in sand and pulverized coal removal, frequent malfunction and failure, inconvenient maintenance, and inability to overcome well deviation.
Contents of Utility Model
For solving the technical problems above, this utility model offers a type of enhanced gas lift comprised of a pipe string structure installed in a gas well, wherein the pipe string structure is made up of a casing, a tubing and a small diameter pipe string with 25 openings at both ends; the tubing is installed inside the casing, and the small diameter pipe string is installed inside the tubing.
In the utility model, coiled tubing can be directly selected for small-diameter pipe string, or multiple hollow sucker rods can be connected end to end.
Further, an opening on the upper end of the small diameter pipe string is connected to 30 an inlet end of a gas-water separator through a third pipeline; and an opening at the
2019100015 08 Jan 2019 upper end of a tubing-tubing annular space formed by the small diameter pipe string and the tubing is connected to a compressed gas supply device through a fourth pipeline;
or, the opening at the upper end of the small-diameter pipe string is connected to the compressed gas supply device through a first pipe; and the opening at the upper end of the tubing-tubing annular space is connected to the inlet end of the gas water separator through a second pipe.
Preferably, the compressed gas supply device is a compressor or a high-pressure gas 10 source.
Further, an opening at the upper end of the small-diameter pipe string is connected to the inlet end of the gas water separator through a third pipe, an opening at the upper end of the tubing-tubing annular space formed by the small diameter pipe string and the tubing is connected to the inlet end of the gas water separator through a second 15 pipeline; an opening at the upper end of the tubing-tubing annular space is connected to the compressed gas supply device through a fourth pipeline, an opening at the upper end of the small diameter pipe string is connected to the compressed gas supply device through a first pipeline; the first pipeline and the fourth pipeline are equipped with a pipeline switching device capable of switching between the first pipeline and 20 the fourth pipeline; the second pipeline and the third pipeline are also equipped with a pipeline switching device capable of switching between the second pipeline and the third pipeline.
Preferably, the pipeline switching device is a reversing valve.
Preferably, the pipeline switching devices are two pipeline control valves respectively 25 installed on the first pipeline and the fourth pipeline, or two pipeline control valves respectively installed on the second pipeline and the third pipeline.
Further, an opening at the upper end of a tubing-casing annular space formed by the tubing and the casing is connected to a gas gathering system, an exhaust port of the gas-water separator is respectively connected to the gas gathering system and the 30 compressed gas supply device, and a regulating valve is installed between the gas-water separator and the gas gathering system.
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Further, the enhanced gas lift is comprised of multiple pipe string structures respectively installed in multiple gas wells.
Compared with existing technologies, this utility model has the following benefits:
1. Simple structure, no downhole moving parts, no workover, and all maintenance and 5 repair can be carried out on the surface, which can effectively cut costs and ensure continuous production.
2. This utility model adopts a rod-less production method, which does not produce eccentric wear and does not need centralizing. It has a wide scope of application, and can be used in vertical wells, directional wells and horizontal wells.
3. The lower end of the small diameter pipe string is open, without the need of any downhole tools and can go directly to the bottom hole fluid. The pipeline is not easy to be clogged and is suitable for use in situations where fine and sand are generated.
4. The compressor compresses the extracted gas and injects it into the well for recycling, without the need for an external gas source.
5. It can effectively reduce starting pressure, and lower requirements and cost of compressor.
6. The production process has a good degree of controllability. Since the bottoms of pipelines are fully open to each other and the flow pathways are all connected, the water production of the small diameter pipe string can be controlled by adjusting the speed of the compressor.
7. There is no need for NPSH, which can minimize bottom hole flowing pressure.
8. This utility model also enables different water production with the same set of equipment through the addition of pipelines and pipeline switching device, which significantly enhances the flexibility of the equipment and expands the scope of application. Not only will this cut costs, but also avoid inconveniences caused by the replacement of equipment and negative impact on work efficiency.
Description of Drawings
Fig. 1 shows a structural diagram of enhanced gas lift in Embodiment 1;
Fig. 2 shows a structural diagram of enhanced gas lift in Embodiment 2;
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Fig. 3 shows a structural diagram of enhanced gas lift in the first implementation method of Embodiment 3;
Fig. 4 shows a structural diagram of enhanced gas lift in the second implementation method of Embodiment 3;
Fig. 5 shows a structural diagram of enhanced gas lift in the third implementation method of Embodiment 3;
Specific Embodiment
In the description of the utility model, it is necessary to understand that the orientation or positional relationships indicated by terms such as central, vertical, horizontal, front and rear, left, right and vertical, level, top, bottom, inside and outside are based on the orientation or positional relationship shown in the attached drawing. This is only to facilitate the description of the utility model and to simplify description, and is not used to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Thus, this cannot be understood as a limitation to the scope of protection of this utility model.
Embodiment 1
An enhanced gas lift, as shown in Fig. 1, is comprised of a pipe string structure installed in a gas well, wherein the pipe string structure is made up of a casing 1, a tubing 2 and a small diameter pipe string 3 with openings at both ends; the casing 1 is used for supporting the gas well wall, its bottom goes down to the bottom of the gas well, and a perforating gun is used for perforating the casing relative to a reservoir; the tubing 2 is installed inside the casing 1, a tubing-casing annual space is formed between the tubing 2 and the casing 1, the lower end of the tubing 2 is less deep than that of the casing 1, so that water is not easily blocked; the lower end depth of the tubing 2 is generally at or slightly below the reservoir; the small diameter pipe string 3 is installed inside the tubing 2, the specification of small diameter pipe string 3 can be ID25, the lower end depth of the small diameter pipe string 3 is less than or equal to that of the tubing 2, a tubing-tubing annular space is formed between the small diameter pipe string 3 and the tubing 2; an opening at the upper end of the small diameter pipe string 3 is connected to the inlet end of the gas-water separator 4 through a third pipeline 103, and an opening at the upper end of the tubing-tubing
2019100015 08 Jan 2019 annular space is connected to a compressor 5 through a fourth pipeline 104; an opening at the upper end of the tubing-casing annular space is connected to a gas gathering system 7, and the gas extracted by the enhanced gas lift is mainly discharged from the gas well through the tubing-casing annular space, then enters the 5 gas gathering system 7; an exhaust port of the gas-water separator 4 is respectively connected to the gas gathering system 7 and the compressor 5, a regulating valve 8 is installed between the gas-water separator 4 and the gas gathering system 7, and the gas-liquid mixture discharged from the pipe string structure enters the gas-water separator 4 and is separated into gas and water; the relative proportion of the gas 10 separated from the gas-water separator 4 to the compressor 5 and the gas gathering system 7 is regulated and controlled by the regulating valve. The separated gas shall satisfy the use of compressor 5 first to ensure that the pressure of the compressor 5 is stable, then the gas is re-pressurized by the compressor 5 and injected into the gas well to realize gas circulation; when there is enough separated gas, the remaining gas, 15 after satisfying the use of the compressor 5, shall be directed into the gas gathering system 7.
When the enhanced gas lift provided in this embodiment is used for drainage and gas production, the compressor 5 injects high-pressure gas into the tubing-tubing annular space through the fourth pipeline 104 to reduce the densify of gas-liquid mixture in 20 the gas well, and to form a high-speed fluid to discharge the low-density gas-liquid mixture out of the gas well through the small diameter pipe string 3; at the same time, the extracted gas is discharged from the gas well through the tubing-casing annular space, then enters the gas gathering system 7; the discharged gas-liquid mixture enters the gas-water separator 4 through the third pipeline 103 for separation, the separated 25 gas shall satisfy the use of compressor 5 first, then the gas is re-pressurized by the compressor 5 and injected into the gas well to realize gas circulation; when there is enough separated gas, the remaining gas, after satisfying the use of the compressor 5, shall be directed into the gas gathering system 7 by adjusting the regulating valve 8.
In this embodiment, the regulating methods of regulating valve 8 include: when the 30 gas pressure at the exhaust port of the gas-water separator 4 is less than or equal to the gas pressure in the pipeline entering the gas gathering system 7, close the regulating valve 8 and direct all gas separated from the gas-water separator 4 into the compressor 5; when the gas pressure at the exhaust port of the gas-water separator 4 is greater
2019100015 08 Jan 2019 than the gas pressure in the pipeline entering the gas gathering system 7, open the regulating valve 8 and adjust the valve size so that the gas separated from the gas-water separator 4 can be directed into the gas gathering system 7, except for the portion required by the compressor 5.
In this embodiment, preferably, the fourth pipeline 104 is equipped with a gas flow regulator 6, which is used for regulating and controlling the flow of high-pressure gas forced into the pipe string structure by the compressor 5. That is to say, the purposes of adjusting the water production of the pipe string structure and controlling the downhole pressure change are realized by controlling the volume of the high-pressure 10 gas forced into the pipe string structure.
The enhanced gas lift provided by this utility model has a simple structure. The downhole pipe string structure is only comprised of an orderly assembly of a casing 1, a tubing 2 and a small diameter pipe string 3. Both the lower ends of the tubing 2 and the small diameter pipe string 3 are open, without the need of any downhole tools and 15 can go directly to the bottom hole fluid, thus noted for their wide range of application, convenient installation, simple maintenance and good operation stability. At the same time, the pipeline is not easy clogged, the drainage and production process has a high degree of controllability, and there is no need for NPSH, which can minimize bottom hole flowing pressure.
Embodiment 2
An enhanced gas lift, as shown in Fig. 2, is comprised of a pipe string structure installed in a gas well, wherein the pipe string structure is made up of a casing 1, a tubing 2 and a small diameter pipe string 3 with openings at both ends; the tubing 2 is installed inside the casing 1, a tubing-casing annual space is formed between the 25 tubing 2 and the casing 1, the lower end of the tubing 2 is less deep than that of the casing 1; the small diameter pipe string 3 is installed inside the tubing 2, the lower end depth of the small diameter pipe string 3 is less than or equal to that of the tubing 2, and a tubing-tubing annular space is formed between the small diameter pipe string 3 and the tubing 2; an opening at the upper end of the small diameter pipe string 3 is 30 connected to the compressor 5 through a first pipeline 101, and an opening at the upper end of the tubing-tubing annular space is connected to the inlet end of the gas-water separator 4 through a second pipeline 102; an opening at the upper end of
2019100015 08 Jan 2019 the tubing-casing annular space is connected to a gas gathering system 7; an exhaust port of the gas-water separator 4 is respectively connected to the gas gathering system and the compressor 5, and a regulating valve 8 is installed between the gas-water separator 4 and the gas gathering system 7.
In this embodiment, preferably, the first pipeline 101 is equipped with a gas flow regulator 6, which is used for regulating and controlling the flow of high-pressure gas forced into the pipe string structure by the compressor 5. That is to say, the purposes of adjusting the water production of the pipe string structure and controlling the downhole pressure change are realized by controlling the volume of the high-pressure 10 gas forced into the pipe string structure.
When the enhanced gas lift provided in this embodiment is used for drainage and gas production, the compressor 5 injects high-pressure gas into the small diameter pipe string 3 through the fourth pipeline 101 to reduce the density of gas-liquid mixture in the gas well, and to form high-speed fluid to discharge the low-density gas-liquid 15 mixture out of the gas well through the tubing-tubing annular space; at the same time, the extracted gas is discharged from the gas well through the tubing-casing annular space, then enters the gas gathering system 7; the discharged gas-liquid mixture enters the gas-water separator 4 through the third pipeline 102 for separation, the separated gas shall satisfy the use of compressor 5 first, then the gas is re-pressurized by the 20 compressor 5 and injected into the gas well to realize gas circulation; when there is enough separated gas, the remaining gas, after satisfying the use of the compressor 5, shall be directed into the gas gathering system 7 by adjusting the regulating valve 8.
The function of the enhanced gas lift provided in this embodiment is the same as that provided in Embodiment 1. Furthermore, as the cross-sectional area of the tubing-tubing annular space is generally larger than that of small diameter pipe string 3, the gas-liquid mixture is discharged from the tubing-tubing annular space with a relatively large cross-sectional area, which can effectively improve the discharge and gas production, and is suitable for extraction operation in situations where the gas well has a large water production. With the same water production as the existing gas 30 wells, only a relatively small amount of compressed gas needs to be injected, and a relatively low bottom hole flowing pressure can be realized, which is more conducive to the production of gas well.
2019100015 08 Jan 2019
Embodiment 3
This type of enhanced gas lift is different from Embodiment 2 in that: The opening at the upper end of the small diameter pipe string 3 is connected to the inlet end of the gas-water separator 4 through the third pipeline 103, and the opening at the upper end 5 of the tubing-tubing annular space is connected to the compressor 5 through the fourth pipeline 104; the first pipeline 101 and the fourth pipeline 104 are equipped with a pipeline switching device capable of switching between the first pipeline 101 and the fourth pipeline 104; and the second pipeline 102 and the third pipeline 103 are also equipped with a pipeline switching device capable of switching between the second 10 pipeline 102 and the third pipeline 103.
In this embodiment, preferably, the fourth pipeline 104 is also equipped with a gas flow regulator 6.
The enhanced gas lift provided in this embodiment can be used in different ways according to the water production requirements of the gas well, which solves the 15 problems related to different water production requirements needed to ensure production pressure difference under the circumstances of changes in downhole static pressure and fluid production index arising from general reasons. Under the condition of not changing the basic structure of the original equipment, the flexibility of equipment water production is greatly enhanced, which can meet different application 20 requirements. Not only will this embodiment avoid increase in equipment cost due to the necessity to use more than one set of equipment, but will also effectively prevent inconveniences caused by the replacement of equipment and negative impact on the work efficiency.
According to the characteristics of gas well extraction, the lower the bottom hole 25 pressure is, the larger the volume of water discharged by the enhanced gas lift.
However, when the same gas well is at different operation and extraction stages, the bottom hole pressure will also change with the extraction process. When production have just begun, the bottom hole pressure is relatively high and water discharge from gas well is low. As the process of production progresses, bottom hole pressure 30 decreases and water discharge from gas well becomes relatively high. For the enhanced gas lift provided in this embodiment, the pipeline switching device can be adjusted according to different water production requirements in order to change the
2019100015 08 Jan 2019 usage method of the enhanced gas lift, so that the enhanced gas lift can be put in a better state of operation throughout the whole mining process, which would ensure the smooth extraction of gas wells.
In this embodiment, in terms of the specific setting of the pipeline switching device, the reversing valve can be installed at the junction of two pipelines (the first pipeline
101 and the fourth pipeline 104, or the second pipeline 102 and the third pipeline 103), the pipeline control valves are respectively installed on the two pipelines to respectively control the opening/closing of two pipelines, or other reasonable pipeline conversion structures are adopted. In the process of connecting the first pipeline 101, 10 the second pipeline 102, the third pipeline 103 and the fourth pipeline 104, reasonable pipe combination and pipe connection can also be carried out according to actual application requirements.
Several implementation methods are listed below to describe in detail the specific settings of various pipelines and pipeline switching devices.
The first implementation method of this embodiment is shown in Fig. 2. The pipeline switching device being installed on the first pipeline 101 and the fourth pipeline 104 is the first reversing valve 211, the outlet of the compressor 5 is respectively connected to the first pipeline 101 and the fourth pipeline 104 through the first reversing valve 211. Meanwhile, the pipeline switching device installed on the second 20 pipeline 102 and the third pipeline 103 is the second reversing valve 212, and the second pipeline 102 and the third pipeline 103 are respectively connected to the gas-water separator 4 through the second reversing valve 212.
In this implementation method, by controlling the first reversing valve 211 and the second reversing valve 212, the same equipment can meet the extraction requirements 25 under different water production.
When the water production requirement of the gas well is relatively low, adjust the first reversing valve 211 and the second reversing valve 212 to open up the third pipeline 103 and the fourth pipeline 104, while the first pipeline 101 and the second pipeline 102 remain closed. The high-pressure gas provided by the compressor 5 30 enters the fourth pipeline 104 after passing the first reversing valve 211, and then enters the tubing-tubing annular space through the fourth pipeline 104. In the gas well, the density of gas-liquid mixture in the gas well is reduced, and high-speed fluid is
2019100015 08 Jan 2019 formed. The low-density gas-liquid mixture is discharged from the gas well into the third pipe 103 through the small-diameter pipe string 3, and then enters the gas-water separator 4 through the second reversing valve 212.
When the water production requirement of the gas well is relatively high, adjust the first reversing valve 211 and the second reversing valve 212 to open up the first pipeline 101 and the second pipeline 102, while the third pipeline 103 and the fourth pipeline 104 should remain closed. The high-pressure gas provided by the compressor 5 enters the first pipeline 101 after passing the first reversing valve 211, and then enters the small diameter pipe string 3 through the first pipeline 101. In the gas well, 10 the density of gas-liquid mixture in the gas well is reduced, and high-speed fluid is formed. The low-density gas-liquid mixture is discharged from the gas well into the second pipe 102 through the tubing-tubing annular space, and then enters the gas-water separator 4 through the second reversing valve 212.
The second implementation method of this embodiment is shown in Fig. 3. The pipeline switching device installed on the first pipeline 101 and the fourth pipeline 104 includes a first stop valve 221 installed on the first pipeline 101 and a second stop valve 222 installed on the second pipeline 102, and the pipeline switching device installed on the second pipeline 102 and the third pipeline 103 includes a third stop valve 223 installed on the third pipeline 103 and a fourth stop valve 224 installed on 20 the fourth pipeline 104.
In this implementation method, by controlling the first stop valve 221, the second stop valve 222, the third stop valve 223 and the fourth stop valve 224, the same equipment can meet the extraction requirements of different water productions.
When the discharge requirement of the gas well is relatively low, close the first stop valve 221 and the second stop valve 222, and open the third stop valve 223 and the fourth stop valve 224; the high-pressure gas provided by the compressor 5 enters the fourth pipeline 104 after passing through the fourth stop valve 224, and then enters the tubing-tuning annular space through the fourth pipeline 104. In the gas well, the density of gas-liquid mixture in the gas well is reduced, and high-speed fluid is formed. The low-density gas-liquid mixture is discharged from the gas well into the third pipeline 103 through the small diameter pipe string 3, and then enters the gas-water separator 4 through the third stop valve 223.
io
2019100015 08 Jan 2019
When the discharge requirement of the gas well is relatively high, open the first stop valve 221 and the second stop valve 222, and close the third stop valve 223 and the fourth stop valve 224; the high-pressure gas provided by the compressor 5 enters the first pipeline 101 through the first stop valve 221, and then enters the small diameter pipe string 3 through the first pipeline 101. In the gas well, the density of gas-liquid mixture in the gas well is reduced, and a high-speed fluid is formed. The low-density gas-liquid mixture is discharged from the gas well through the tubing-tubing annular space into the second pipeline 102 and then enters the gas-water separator 4 through the second stop valve 222.
The third implementation method of this embodiment is shown in Fig. 4. The outlet end of the compressor 5 is respectively connected to the first pipeline 101 and the fourth pipeline 104 through a tee flange, and the pipeline switching device installed on the first pipeline 101 and the fourth pipeline 104 includes a first gate valve 231 installed on the first pipeline 101 and a fourth gate valve 234 installed on the fourth pipeline 104;
The inlet end of the gas-water separator 4 is respectively connected to the second pipeline 102 and the third pipeline 103 through a tee flange, the pipeline switching device installed on the second pipeline 102 and the third pipeline 103 includes a second gate valve 232 installed on the second pipeline 102 and a third gate valve 233 20 installed on the third pipeline 103; one end of the second pipeline 102, which is far away from the gas-water separator 4, is connected to the fourth pipeline 104 between the fourth gate valve 234 and the opening at the upper end of the tubing-tubing annular space; and one end of the third pipeline 103, which is away from the gas-water separator 4, is connected to the first pipeline 101 between the first gate valve 231 and the opening at the upper end of the small diameter pipe string 3.
In this implementation method, by controlling the first gate valve 231, the second gate valve 232, the third gate valve 233 and the fourth gate valve 234, the same equipment can meet the extraction requirements of different water productions.
When the water production requirement of the gas well is relatively low, close the first gate valve 231 and the second gate valve 232, and open the third gate valve 233 and the fourth gate valve 234; the high-pressure gas provided by the compressor 5 enters the fourth pipeline 104 through the tee flange, and then enters the tubing-tubing
2019100015 08 Jan 2019 annular space through the fourth pipeline 104. In the gas well, the density of gas-liquid mixture in the gas well is reduced, and high-speed fluid is formed. The low-density gas-liquid mixture is discharged from the gas well into the third pipeline 103 through the small diameter pipe string 3, and then enters the gas-water separator 4 5 through the third pipeline 103.
When the water production requirement of the gas well is relatively high, open the first gate valve 231 and the second gate valve 232, and close the third gate valve 233 and the fourth gate valve 234; the high-pressure gas provided by the compressor 5 enters the first pipeline 101 through the tee flange, and then enters the small diameter 10 pipe string 3 through the first pipeline 101. In the gas well, the density of gas-liquid mixture in the gas well is reduced, and high-speed fluid is formed. The low-density gas-liquid mixture is discharged from the gas well through the tubing-tubing annular space into the second pipeline 102, and then enters the gas-water separator 4 through the second pipeline 102.
The above three implementation methods should only be considered relatively better for the specific settings of pipelines and pipeline switching devices in this embodiment, and are not used to restrict the specific settings of pipelines and pipeline switching devices in this embodiment. Any reasonable pipeline setting and pipeline switching device that can satisfy the switching of the first pipeline 101 and the fourth pipeline 104, as well as the switching of the second pipeline 102 and the third pipeline 103, shall be included in the scope of protection of this utility model.
Embodiment 4
This type of enhanced gas lift is different from Embodiment 3 in that: The enhanced gas lift includes multiple pipe string structures set in multiple gas wells to realize that 25 the same enhanced gas lift control over the production process of multiple gas wells at the same time. According to equipment condition and other factors, one or more compressors 5 can be installed in the enhanced gas lift and connected to multiple pipe string structures. Similarly, one or more gas-water separators 4 can be installed in the enhanced gas lift and connected to multiple string structures.
Last but not least, it shall be noted that the above embodiments are only used as technical solution reference of this utility model but do not constitute limitations. Although details descriptions for the aforesaid relatively better embodiments have
2019100015 08 Jan 2019 been provided for this utility model, this field's ordinary technical personnel shall understand that the technical solutions of this utility model may be modified or equivalently replaced without deviating from the spirit and scope of the technical solution of this utility model, which shall be covered by the scope of the claims of this 5 utility model.
Claims (5)
- Claims1. An enhanced gas lift, comprised of a pipe string structure installed in a gas well, wherein the pipe string structure comprises a casing (1), a tubing (2) and a small5 diameter pipe string (3) with openings at both ends; the tubing (2) is installed inside the casing (1), and the small diameter pipe string (3) is installed inside the tubing (2).
- 2. The enhanced gas lift, according to claim 1, has an opening on the upper end of the small diameter pipe string (3), which is connected to an inlet end of a gas-water separator (4) through a third pipeline (103); and an opening at the upper end of a10 tubing-tubing annular space formed by the small diameter pipe string (3) and the tubing (2), which is connected to a compressed gas supply device through a fourth pipeline (104);or, the opening at the upper end of the small-diameter pipe string (3) is connected to the15 compressed gas supply device through a first pipe (101); and the opening at the upper end of the tubing-tubing annular space is connected to the inlet end of the gas water separator (4) through a second pipe (102).
- 3. The enhanced gas lift, according to claim 1, has an opening at the upper end of the small-diameter pipe string (3), which is connected to the inlet end of the gas water20 separator (4) through a third pipe (103), and an opening at the upper end of the tubing-tubing annular space formed by the small diameter pipe string (3) and the tubing (2), which is connected to the inlet end of the gas water separator (4) through a second pipeline (102); an opening at the upper end of the tubing-tubing annular space, which is connected to the compressed gas supply device through a fourth pipeline25 (104), and an opening at the upper end of the small diameter pipe string (3), which is connected to the compressed gas supply device through a first pipeline (101); the first pipeline (101) and the fourth pipeline (104) are equipped with a pipeline switching device capable of switching between the first pipeline (101) and the fourth pipeline (104); the second pipeline (102) and the third pipeline (103) are also equipped with a30 pipeline switching device capable of switching between the second pipeline (102) and the third pipeline (103).2019100015 08 Jan 2019
- 4. The enhanced gas lift, according to claim 2 or 3, has an opening at the upper end of a tubing-casing annular space formed by the tubing (2) and the casing (1), which is connected to a gas gathering system (7), an exhaust port of the gas-water separator (4) is respectively connected to the gas gathering system (7) and the compressed gas
- 5 supply device, and a regulating valve (8) is installed between the gas-water separator (4) and the gas gathering system (7).5. The enhanced gas lift, according to claim 4, is comprised of multiple pipe string structures respectively installed in multiple gas wells.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822066465.3 | 2018-12-10 | ||
| CN201822066465.3U CN209339915U (en) | 2018-12-10 | 2018-12-10 | A kind of enhanced gaslift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2019100015A4 true AU2019100015A4 (en) | 2019-02-14 |
Family
ID=65320641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019100015A Ceased AU2019100015A4 (en) | 2018-12-10 | 2019-01-08 | An Enhanced Gas Lift |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209339915U (en) |
| AU (1) | AU2019100015A4 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115335585A (en) * | 2020-02-04 | 2022-11-11 | 狩猎巨人公司 | Bundling gun system |
-
2018
- 2018-12-10 CN CN201822066465.3U patent/CN209339915U/en not_active Expired - Fee Related
-
2019
- 2019-01-08 AU AU2019100015A patent/AU2019100015A4/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN209339915U (en) | 2019-09-03 |
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