CN117988797B - Nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device - Google Patents
Nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device Download PDFInfo
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- CN117988797B CN117988797B CN202410407794.7A CN202410407794A CN117988797B CN 117988797 B CN117988797 B CN 117988797B CN 202410407794 A CN202410407794 A CN 202410407794A CN 117988797 B CN117988797 B CN 117988797B
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- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 34
- 239000012530 fluid Substances 0.000 title claims abstract description 23
- 230000010349 pulsation Effects 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 230000000670 limiting effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 21
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model provides a nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device, relates to oil field downhole tool technical field, including upper section barrel and lower section barrel, upper section barrel has the filling port, upper section barrel sliding seal is provided with switch plug group, leave the annular chamber between lower part and the upper section barrel of lower section barrel, the upper section barrel that the annular chamber corresponds is processed has axial blind hole, upper section barrel is processed and is had the upper feed liquor hole of blind hole upper end and upper section barrel outside intercommunication, lower section barrel has lower feed liquor hole, annular intracavity seal is provided with the slip plug; the switch plug group comprises a plug cylinder and a plug core, wherein the upper part of the plug core can be inserted into a small-diameter section of the plug cylinder in a sealing way, and the plug core and the plug cylinder can be clamped and connected to limit the separation of the plug cylinder and the plug core; an overflow valve is arranged in the lower section cylinder body below the lower liquid inlet hole, and the overflow valve can be opened and closed at proper time. The invention provides two channels for separate injection of two oil displacement agents, namely gas and liquid, so that instantaneous alternate conversion and pulsation oil displacement can be formed.
Description
Technical Field
The invention belongs to the technical field of oilfield downhole tools, and particularly relates to a nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device.
Background
Poor flowability of crude oil in a compact reservoir is a key factor affecting efficient development of compact oil, the existing liquid system does not have the capability of improving the flowability of compact oil, and part of surfactants are easy to emulsify or reverse emulsify with crude oil to form oil-in-water or water-in-oil particles, so that the particle size or apparent viscosity of crude oil is increased, and the migration difficulty of crude oil in the compact reservoir is increased.
The water-based silicon dioxide nano fluid is a novel fluid working medium which is convenient to prepare and environment-friendly, has excellent performance in improving the wettability of reservoir rocks, is widely applied to the tertiary oil recovery field at present, and improves the recovery ratio of petroleum to a great extent.
However, in the oil displacement process, only one oil displacement agent of the water-based silicon dioxide nano fluid is insufficient, and a gas oil displacement agent is needed to be used, so that the oil displacement effect is better improved, wherein the gas oil displacement agent is mainly a mixture of nitrogen, water vapor and carbon dioxide.
The current common practice is to prepare the water-based silica nano-fluid on the ground and simultaneously prepare the gas oil-displacing agent, and when the water-based silica nano-fluid and the gas oil-displacing agent are injected, the injected channels are the same channel, namely the channel in the oil pipe column, so that the aim of instant alternate conversion injection cannot be realized in the prior art.
Disclosure of Invention
In order to solve the problem of instantaneous switching of two oil displacement agents, the application provides a nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device.
The technical scheme provided by the invention is as follows: the nanometer multi-fluid gas-liquid mixed pulsation oil displacement device comprises an upper section cylinder body and a lower section cylinder body, wherein an injection port for injecting an oil displacement agent is formed in the side wall of the upper section cylinder body, a switch plug group is arranged in the upper section cylinder body in a sliding sealing manner, the injection port can be plugged or opened in the sliding process of the switch plug group, a soluble pin for blocking the switch plug group from descending is arranged on the upper section cylinder body at the moment, the lower section cylinder body is in threaded connection with the upper section cylinder body, an annular cavity is reserved between the lower part of the lower section cylinder body and the upper section cylinder body, an axial blind hole is formed in the upper section cylinder body corresponding to the annular cavity, an upper liquid inlet hole communicated with the outer part of the upper section cylinder body is formed in the upper section cylinder body, a lower liquid inlet hole is formed in the side wall of the lower section cylinder body in a sealing manner, a sliding plug in the annular cavity is arranged in the initial state, the lower liquid inlet hole can be plugged in the sliding plug group, a spring is arranged below the sliding plug group in the sliding process, the sliding plug group and is in mutual abutting connection with the sliding plug, under the elastic force of the spring, the sliding plug is provided with an upward sliding joint, and the upper end and the lower end of the sliding plug is in sliding connection with the threaded joint; the switch plug group comprises a plug cylinder, a plug core and a plug core limiting ring, wherein the inner side of the upper part of the plug cylinder is a small-diameter section, the inner side of the lower part of the plug cylinder is an expanded-diameter section, the plug core is positioned in the expanded-diameter section, the outer diameter of the upper part of the plug core is smaller than that of the lower part, the upper part of the plug core can be sealed and inserted into the small-diameter section of the plug cylinder, the upper end surface of the plug core is provided with a clamping jaw, and after the clamping jaw is clamped with the clamping jaw, the clamping jaw and the plug core are limited to descend; the plug core limiting ring is positioned below the plug core and used for limiting the lower end surface of the plug core, and the plug core limiting ring is fixedly connected with the plug cylinder; the utility model provides a lower feed liquor hole below be provided with the overflow valve in the lower section barrel, the overflow valve include the valve body, the valve body has vertical through-hole, the processing of middle part one side of valve body has the cavity, the cavity is divided into upper and lower two parts with the through-hole on the valve body, articulated in the cavity has the closing cap, the closing cap can be with the lower part closing cap of through-hole, the cavity internal fixation is provided with the axle sleeve, sliding seal is provided with the sliding shaft that is used for promoting closing cap pivoted in the axle sleeve, the processing of lower section barrel lateral wall department that sliding shaft department corresponds has the pressure transmission hole, it is filled with liquid in the area around slip stopper, upper section barrel, lower section barrel and the lower joint.
The further technical scheme is as follows: and a rubber cylinder component capable of being sealed is arranged on the outer side of the upper section cylinder body between the injection opening and the upper liquid inlet.
The further technical scheme is as follows: the rubber cylinder assembly comprises an expansion rubber cylinder, a sealing hole for injecting liquid between the inner wall of the expansion rubber cylinder and the outer wall of the upper cylinder is processed on the side wall of the upper cylinder, and a one-way valve is arranged in the sealing hole.
The further technical scheme is as follows: in the initial state, the opening angle of the cover plate is not smaller than 90 degrees.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention has two injection channels inside and outside, two oil displacement agents are respectively injected into the same compact reservoir through the two channels, and the two oil displacement agents can realize instant switching injection, thereby realizing the purpose of pulse injection oil displacement.
2. According to the invention, the packer below the dual-channel injection valve and the rubber cylinder in the dual-channel injection valve can be simultaneously set through one pipe column, and after the packer is set, the dual-channel injection effect can be realized only through the internal overflow valve and the switch plug group.
Drawings
FIG. 1 is a cross-sectional view of the entire present invention.
Fig. 2 is a cross-sectional view of a switch plug set in accordance with the present invention.
Fig. 3 is a cross-sectional view of an excess flow valve in accordance with the present invention.
In the figure: 1. an upper section cylinder; 2. an upper liquid inlet hole; 3. an expansion rubber cylinder; 4. a blind hole; 5. sealing holes; 6. an injection port; 7. a sliding plug; 8. a lower liquid inlet hole; 9. a pressure transmitting hole; 10. a lower joint; 11. a spring; 12. a lower section cylinder; 13. a soluble pin; 14. a plug cylinder; 15. clamping teeth; 16. a claw; 17. a plug core; 18. a stopper core limiting ring; 19. a valve body; 20. a through hole; 21. a cavity; 22. a cover plate; 23. a shaft sleeve; 24. and a sliding shaft.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
Referring to fig. 1-3, the embodiment includes an upper section cylinder 1 and a lower section cylinder 12, the side wall of the upper section cylinder 1 is provided with an injection port 6, the injection port 6 is communicated with the inside and the outside of the upper section cylinder 1, a switch plug group is arranged in the upper section cylinder 1 in a sliding manner, the injection port 6 can be plugged or opened in the sliding process of the switch plug group, a step for limiting the upper end face of the switch plug group is arranged in the upper section cylinder 1, the lower section cylinder 12 is in threaded connection with the upper section cylinder 1, the upper end of the lower section cylinder 12 can limit the lower end face of the switch plug group, so that the switch plug group slides in a limited range, when the switch plug group slides to an upper limit point, the injection port 6 leaks out and is positioned below the switch plug group, when the switch plug group slides to a lower limit point, the injection port 6 leaks out and is positioned above the switch plug group, and in an initial state, the switch plug group is plugged with the injection port 6, and a soluble pin 13 for blocking the switch plug group from descending is arranged on the upper section cylinder 1 at the moment.
An annular cavity is reserved between the lower part of the lower section cylinder body 12 and the upper section cylinder body 1, an axial blind hole 4 is formed in the upper section cylinder body 1 corresponding to the annular cavity, an upper liquid inlet hole 2 communicated with the outside of the upper section cylinder body 1 is formed in the upper section cylinder body 1, a lower liquid inlet hole 8 is formed in the side wall of the lower section cylinder body 12, a sliding plug 7 is arranged in the annular cavity in a sealing mode, the sliding plug 7 is located at the uppermost part in an initial state, the lower liquid inlet hole 8 is plugged by the sliding plug 7, the lower liquid inlet hole 8 can be opened in the downward sliding process of the sliding plug 7, a spring 11 is arranged below the sliding plug 7, the sliding plug 7 has a movement trend of sliding upwards under the elastic force of the spring 11, the lower end of the upper section cylinder body 1 is in threaded connection with a lower joint 10, the lower end of the lower section cylinder body 12 is also in threaded connection with the lower joint 10, and the lower end of the spring 11 abuts against the lower joint 10.
The switch plug group comprises a plug cylinder 14, a plug core 17 and a plug core limiting ring 18, wherein the inner side of the upper part of the plug cylinder 14 is a small-diameter section, the inner side of the lower part of the plug cylinder is an expanded-diameter section, the plug core 17 is positioned in the expanded-diameter section, the outer diameter of the upper part of the plug core 17 is smaller than that of the lower part, the upper part of the plug core 17 can be sealed and inserted into the small-diameter section of the plug cylinder 14, the upper end surface of the plug core 17 is provided with a clamping jaw 16, the inner side of the upper part of the plug cylinder 14 is provided with a clamping tooth 15, and after the clamping jaw 16 is clamped with the clamping tooth 15, the clamping jaw 16 and the plug core 17 are limited to move downwards; the stopper core limiting ring 18 is located below the stopper core 17 and is used for limiting the lower end face of the stopper core 17, and the stopper core limiting ring 18 is fixedly connected with the stopper cylinder 14.
The lower section cylinder 12 below the lower liquid inlet hole 8 is internally provided with an overflow valve, the overflow valve comprises a valve body 19, the valve body 19 is provided with a vertical through hole 20, one side of the middle part of the valve body 19 is provided with a cavity 21, the cavity 21 divides the through hole 20 on the valve body 19 into an upper part and a lower part, a sealing cover plate 22 is hinged in the cavity 21, the sealing cover plate 22 can seal the lower part of the through hole 20, a shaft sleeve 23 is fixedly arranged in the cavity 21, the shaft sleeve 23 is welded with the valve body 19, a sliding shaft 24 for pushing the sealing cover plate 22 to rotate is arranged in the shaft sleeve 23 in a sliding sealing manner, the side wall of the lower section cylinder 12 corresponding to the sliding shaft 24 is provided with a pressure transmission hole 9, liquid is filled in the surrounding areas of the sliding plug 7, the upper section cylinder 1, the lower section cylinder 12 and the lower joint 10, and the sliding plug 7 slides towards the sealing cover plate 22 under the action of hydraulic pressure when the sliding plug 7 descends, and the opening angle of the sealing cover plate 22 is reduced.
The rubber tube assembly capable of being set is arranged on the outer side of the upper section cylinder body 1 between the injection opening 6 and the upper liquid inlet 2, and the specific structure of the rubber tube assembly in the embodiment does not belong to the scope of protection of the embodiment, so long as the rubber tube assembly capable of being set is arranged in the section.
The rubber cylinder assembly comprises an expansion rubber cylinder 3, a sealing hole 5 for injecting liquid between the inner wall of the expansion rubber cylinder 3 and the outer wall of the upper cylinder 1 is processed on the side wall of the upper cylinder 1, and a one-way valve is arranged in the sealing hole 5, so that the expansion rubber cylinder 3 is not influenced by pressure removal after being sealed.
In the initial state, the opening angle of the cover plate 22 is not smaller than 90 degrees.
The application process and the operation principle of the invention are as follows: the packer is connected below the invention to be put into the well together, and the packer is selected from the most commonly used central tube pressing setting type packer. High-pressure liquid is injected into the pipe column by using a ground high-pressure pump, the packer below is set under the action of hydraulic pressure, meanwhile, the expansion rubber cylinder 3 is expanded and sealed, and the space between the packer and the expansion rubber cylinder 3 is a compact reservoir. In the setting process, the plug core 17 in the switch plug group is not inserted into the plug cylinder 14 yet, a separation gap exists between the plug core 17 and the plug cylinder 14, so that liquid can pass downwards, at the moment, the switch plug group does not descend under the limiting action of the soluble pin 13, and the injection port 6 is not exposed; the liquid can only reach the overflow valve downwards, the sealing cover of the overflow valve is not acted by external force, the original state can be kept, the overflow valve allows the liquid to descend at the moment, the liquid descends into the packer below the packer, and the setting of the packer is realized.
After the packer and the expansion rubber cylinder 3 are set, a certain time is spent, the soluble pin 13 is melted, after the soluble pin 13 is melted, water-based silicon dioxide nano fluid oil displacement agent is injected into the ground through an annular space between an oil pipe and a sleeve, nano fluid enters into the blind hole 4 through the upper liquid inlet hole 2, the sliding plug 7 is pushed to descend under the action of hydraulic pressure against the elastic force of the spring 11, and liquid is filled in an annular cavity below the sliding plug 7, so that the sliding shaft 24 is pushed to slide when the sliding plug 7 descends, the sliding shaft 24 pushes the sealing cover plate 22 to rotate, and the opening angle of the sealing cover plate 22 is gradually reduced to be smaller than 90 degrees. The sliding plug 7 descends to leak the lower liquid inlet hole 8, nano fluid enters the lower section cylinder 12, nano fluid hydraulic pressure entering the lower section cylinder 12 acts on the sealing cover plate 22 downwards on one hand, and the lower part of the through hole 20 is sealed, so that a circuit breaker is formed at the overflow valve, and nano fluid cannot flow downwards; the nano fluid hydraulic pressure entering the lower section cylinder 12 acts on the plug core 17 upwards on the other hand to push the plug core 17 to slide upwards, the upper part of the plug core 17 is inserted into the plug cylinder 14 to form a seal with the plug cylinder 14, the clamping claw 16 is clamped on the clamping tooth 15, and the plug core 17 and the plug cylinder 14 cannot be separated any more.
After the steps are finished, gas oil displacement agents are injected into the compact reservoir through the center of the pipe column, water-based silicon dioxide nano fluid oil displacement agents are injected into the compact reservoir through the oil collar, the two oil displacement agents reach the upper end and the lower end of the switch plug group through two channels, when one oil displacement agent is depressurized, the other oil displacement agent is pressurized, and therefore instant switching of the two oil displacement agents is achieved by pushing the switch plug group to slide.
According to the invention, through one pipe column, not only is the setting of the packer and the expansion rubber cylinder 3 realized, but also the double-channel shunt oil displacement is realized, the process operation flow is simplified, the instant switching of two oil displacement agents is realized, the pulsation change is formed in the process of switching and injecting the two oil displacement agents, the pulsation impact is formed on a compact reservoir, and the oil flow activity is improved; meanwhile, the mixing ratio of the two oil displacement agents of gas and liquid injected into the compact reservoir can be accurately controlled, for example: after 1 cubic meter of water-based silicon dioxide nano fluid is injected, 1 cubic meter of gas oil displacement agent is injected in a matched mode, and the two quantities are controlled very accurately.
Claims (4)
1. A nanoscale multi-fluid gas-liquid mixing pulsation oil displacement device is characterized in that: the device comprises an upper section cylinder body (1) and a lower section cylinder body (12), wherein an injection opening (6) is formed in the side wall of the upper section cylinder body (1), a switch plug group is arranged in the upper section cylinder body (1) in a sliding sealing manner, the injection opening (6) can be plugged or opened in the sliding process of the switch plug group, the injection opening (6) is plugged by the switch plug group in an initial state, and a soluble pin (13) for blocking the switch plug group from descending is arranged on the upper section cylinder body (1) at the moment; the lower section cylinder body (12) is in threaded connection with the upper section cylinder body (1), an annular cavity is reserved between the lower part of the lower section cylinder body (12) and the upper section cylinder body (1), an axial blind hole (4) is formed in the upper section cylinder body (1) corresponding to the annular cavity, an upper liquid inlet hole (2) communicated with the outside of the upper section cylinder body (1) is formed in the upper section cylinder body (1), a lower liquid inlet hole (8) is formed in the side wall of the lower section cylinder body (12), a sliding plug (7) is arranged in the annular cavity in a sealing mode, the lower liquid inlet hole (8) is blocked by the sliding plug (7) in an initial state, the lower liquid inlet hole (8) can be opened in the downward sliding process of the sliding plug (7), a spring (11) is arranged below the sliding plug (7), the sliding plug (7) has a movement trend of upward sliding under the action of the elasticity of the spring (11), the lower end of the upper section cylinder body (1) is in threaded connection with a lower joint (10), and the lower end of the lower section cylinder body (12) is also in threaded connection with the lower joint (10), and the lower end of the spring (11) abuts against the lower joint (10);
The switch plug group comprises a plug cylinder (14), a plug core (17) and a plug core limiting ring (18), wherein the inner side of the upper part of the plug cylinder (14) is a small-diameter section, the inner side of the lower part of the plug cylinder is an expanded-diameter section, the plug core (17) is positioned in the expanded-diameter section, the outer diameter of the upper part of the plug core (17) is smaller than that of the lower part, the upper part of the plug core (17) can be inserted into the small-diameter section of the plug cylinder (14) in a sealing way, a clamping jaw (16) is arranged on the upper end surface of the plug core (17), a clamping tooth (15) is arranged on the inner side of the upper part of the plug cylinder (14), and after the clamping jaw (16) is clamped with the clamping tooth (15), the clamping jaw (16) and the plug core (17) are limited to descend; the plug core limiting ring (18) is positioned below the plug core (17) and used for limiting the lower end surface of the plug core (17), and the plug core limiting ring (18) is fixedly connected with the plug cylinder (14);
The utility model provides a lower feed liquor hole (8) below lower section barrel (12) in be provided with the overflow valve, the overflow valve include valve body (19), valve body (19) have vertical through-hole (20), the middle part one side processing of valve body (19) has cavity (21), cavity (21) divide into upper and lower two parts with through-hole (20) on valve body (19), articulated in cavity (21) have closing cap (22), closing cap (22) can be with the lower part closing cap of through-hole (20), cavity (21) internal fixation is provided with axle sleeve (23), sliding seal is provided with sliding shaft (24) that are used for promoting closing cap (22) pivoted in axle sleeve (23), sliding shaft (24) department corresponds lower section barrel (12) lateral wall department processing have pressure transmission hole (9), fill in the surrounding area of sliding plug (7), upper section barrel (1), lower section barrel (12) and lower joint (10).
2. The nanoscale multi-fluid gas-liquid mixing pulsation oil displacement device according to claim 1, wherein the device is characterized in that: a rubber cylinder component which can be sealed is arranged at the outer side of the upper section cylinder body (1) between the injection opening (6) and the upper liquid inlet (2).
3. The nanoscale multi-fluid gas-liquid mixing pulsation oil displacement device according to claim 2, wherein the device is characterized in that: the rubber cylinder assembly comprises an expansion rubber cylinder (3), a sealing hole (5) for injecting liquid between the inner wall of the expansion rubber cylinder (3) and the outer wall of the upper cylinder (1) is processed on the side wall of the upper cylinder (1), and a one-way valve is arranged in the sealing hole (5).
4. The nanoscale multi-fluid gas-liquid mixing pulsation oil displacement device according to claim 1, wherein the device is characterized in that: in the initial state, the opening angle of the cover plate (22) is not smaller than 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410407794.7A CN117988797B (en) | 2024-04-07 | 2024-04-07 | Nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410407794.7A CN117988797B (en) | 2024-04-07 | 2024-04-07 | Nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device |
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| Publication Number | Publication Date |
|---|---|
| CN117988797A CN117988797A (en) | 2024-05-07 |
| CN117988797B true CN117988797B (en) | 2024-05-31 |
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| CN202410407794.7A Active CN117988797B (en) | 2024-04-07 | 2024-04-07 | Nanoscale multi-fluid gas-liquid mixed pulsation oil displacement device |
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| CN (1) | CN117988797B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202348248U (en) * | 2011-12-19 | 2012-07-25 | 中国石油天然气股份有限公司 | Porous concentric integrated continuous quantificational bottom-hole regulator |
| CN115961922A (en) * | 2021-10-11 | 2023-04-14 | 中国石油化工股份有限公司 | Multi-round low-frequency pulsation chemical agent injection method |
| CN117231184A (en) * | 2023-07-28 | 2023-12-15 | 中海油能源发展股份有限公司 | Fixed tubular column pulsating water injection tool and method based on offshore oilfield hollow integration process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8863835B2 (en) * | 2011-08-23 | 2014-10-21 | Halliburton Energy Services, Inc. | Variable frequency fluid oscillators for use with a subterranean well |
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- 2024-04-07 CN CN202410407794.7A patent/CN117988797B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202348248U (en) * | 2011-12-19 | 2012-07-25 | 中国石油天然气股份有限公司 | Porous concentric integrated continuous quantificational bottom-hole regulator |
| CN115961922A (en) * | 2021-10-11 | 2023-04-14 | 中国石油化工股份有限公司 | Multi-round low-frequency pulsation chemical agent injection method |
| CN117231184A (en) * | 2023-07-28 | 2023-12-15 | 中海油能源发展股份有限公司 | Fixed tubular column pulsating water injection tool and method based on offshore oilfield hollow integration process |
Non-Patent Citations (1)
| Title |
|---|
| 二氧化碳轮注驱油单管双层注入工艺管柱应用分析;滕达;赵元;;科学技术创新;20200525(第15期);第178-179页 * |
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