CN113883490B - Downhole dry steam generation system - Google Patents
Downhole dry steam generation system Download PDFInfo
- Publication number
- CN113883490B CN113883490B CN202010716523.1A CN202010716523A CN113883490B CN 113883490 B CN113883490 B CN 113883490B CN 202010716523 A CN202010716523 A CN 202010716523A CN 113883490 B CN113883490 B CN 113883490B
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- steam
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- dry
- wet
- dry steam
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- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 239000003129 oil well Substances 0.000 claims abstract description 30
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000013508 migration Methods 0.000 abstract description 4
- 230000005012 migration Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 238000009413 insulation Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
- F22B1/282—Methods of steam generation characterised by form of heating method in boilers heated electrically with water or steam circulating in tubes or ducts
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a downhole dry steam generation system for being arranged in a horizontal well, comprising: a wet steam generating assembly disposed on the ground and capable of generating wet steam; the steam cavity is arranged on the horizontal section oil well pipe column of the horizontal well, the inlet of the steam cavity is communicated with the outlet of the wet steam generation assembly through a connecting pipeline, and the outlet of the steam cavity is communicated with the outer side of the horizontal section oil well pipe column; and the heating component is coated on the outer side of the steam cavity and is arranged in the horizontal section oil well pipe column, and can heat the wet steam in the steam cavity and form dry steam. According to the invention, the heating component and the steam cavity are arranged on the horizontal section oil well pipe column, so that the purpose of generating dry steam on the horizontal section oil well pipe column can be realized, the migration length of the dry steam can be reduced, the loss of heat of the dry steam can be reduced, the heat utilization efficiency can be improved, meanwhile, the vertical section shaft is kept in a relatively low-temperature environment, the influence of the heat effect on the stress and the strain of the sleeve is reduced, and the safety of the shaft is ensured.
Description
Technical Field
The invention relates to the field of petroleum engineering, in particular to a downhole dry steam generation system.
Background
In petroleum engineering, especially in the process of thick oil exploitation, the thick oil has high viscosity and great specific gravity, and the thick oil can be exploited by injecting hot steam into stratum to heat oil layer to reduce the viscosity of thick oil. In the conventional steam injection development mode, dry steam is generated by a ground dry steam generating device and injected into the bottom of a well through an injection pipe column. And in the process of injecting dry steam, the dry steam is influenced by the well depth and the performance of a heat insulation pipe, heat losses of different degrees are generated after the dry steam reaches the bottom of the well, meanwhile, the temperature of a shaft is increased, the strength of a pipe column is reduced, and after main steam is circulated, the casing is easily damaged or the well mouth is lifted, so that normal production is influenced.
Disclosure of Invention
The invention provides a downhole dry steam generation system, which aims to improve the utilization efficiency of heat and reduce the influence of thermal stress on a casing above a horizontal section.
The technical scheme adopted for solving the technical problems is as follows: a downhole dry steam generation system for placement in a horizontal well, the downhole dry steam generation system comprising: a wet steam generating assembly disposed on the ground and capable of generating wet steam; the steam cavity is arranged on the horizontal section oil well pipe column of the horizontal well, the inlet of the steam cavity is communicated with the outlet of the wet steam generation assembly through a connecting pipeline, and the outlet of the steam cavity is communicated with the outer side of the horizontal section oil well pipe column; and the heating component is coated on the outer side of the steam cavity and is arranged in the horizontal section oil well pipe column, and can heat the wet steam in the steam cavity and form dry steam.
Further, the steam cavity comprises a wet steam cavity and a dry steam cavity, an inlet of the wet steam cavity is communicated with the wet steam generation assembly, an outlet of the wet steam cavity is connected with an inlet of the dry steam cavity, and an outlet of the dry steam cavity is communicated with the outer side of the horizontal section oil well string.
Further, a connecting baffle plate is arranged at the joint of the outlet of the wet steam cavity and the inlet of the dry steam cavity, and a plurality of axial through holes for steam to pass through are formed in the connecting baffle plate.
Further, the heating component is of a sleeve-shaped structure, and the inner wall of the heating component completely covers the outer walls of the wet steam cavity and the dry steam cavity.
Further, the underground dry steam generation system further comprises a water drainage cavity, the water drainage cavities are arranged outside the wet steam cavity and the dry steam cavity at intervals in parallel, the wet steam cavity is provided with a wet steam cavity condensate water discharge pipe used for connecting the water drainage cavity, and the dry steam cavity is provided with a dry steam cavity condensate water discharge pipe used for connecting the water drainage cavity.
Further, the downhole dry steam generation system further comprises a circulating pump, the inlet is connected with the drainage cavity, and the outlet of the circulating pump is connected with the inlet of the wet steam cavity.
Further, a packer for sealing the horizontal section of the oil well string is arranged at the inlet of the wet steam cavity, and the circulating pump is arranged at the packer.
Further, a plurality of sleeve holes are formed in the pipe wall of the horizontal section oil well pipe column, the underground dry steam generation system further comprises steam output pipes, the steam output pipes are arranged outside the wet steam cavity and the dry steam cavity at intervals in parallel, the opening ends of the steam output pipes are communicated with the outlet of the dry steam cavity, the closed ends of the steam output pipes are located on the inlet side of the wet steam cavity, and a plurality of steam output holes communicated with the sleeve holes are formed in the pipe wall of the steam output pipes.
Further, a dry steam chamber for buffering dry steam is arranged between the opening end of the steam output pipe and the outlet of the dry steam cavity.
Further, the downhole dry steam generation system also comprises a power supply and control system connected with both the wet steam generation assembly and the heating assembly.
The horizontal section oil well pipe column is provided with the heating component and the steam cavity, the purpose of generating dry steam in the horizontal section oil well pipe column can be achieved, and compared with a ground dry steam generating device, the horizontal section oil well pipe column is capable of reducing the migration length of the dry steam, reducing the heat loss of the dry steam, improving the heat utilization efficiency and reducing the influence of thermal stress on a sleeve above the horizontal section.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a steam chamber according to an embodiment of the present invention.
Reference numerals in the drawings: 1. a power supply and control system; 2. a cable; 3. a wet steam generating assembly; 4. a surface manifold; 5. a wellhead four-way joint; 6. a wellbore; 7. a thermal insulation layer; 8. a wellbore heat insulating tube; 9. a packer; 10. a heating assembly; 101. a heating assembly outer insulation layer; 11. a wet steam chamber; 111. a connecting baffle; 112. a one-way valve; 12. a dry steam chamber; 13. a steam output pipe; 14. a steam output hole; 15. a dry steam chamber; 16. a dry steam cavity condensate drain; 17. a wet steam cavity condensed water discharge pipe; 18. a drainage cavity; 19. a sleeve hole; 20. and a circulation pump.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 and 2, an embodiment of the present invention provides a downhole dry steam generating system for placement in a horizontal well, the downhole dry steam generating system comprising a wet steam generating assembly 3, a steam cavity and a heating assembly 10. The wet steam generating assembly 3 is provided on the floor and is capable of generating wet steam. The steam cavity is arranged on the horizontal section oil well pipe column of the horizontal well, the inlet of the steam cavity is communicated with the outlet of the wet steam generation assembly 3 through a connecting pipeline, and the outlet of the steam cavity is communicated with the outer side of the horizontal section oil well pipe column. The heating assembly 10 is wrapped outside the steam cavity and placed in the horizontal section of the well string, and the heating assembly 10 is capable of heating the wet steam in the steam cavity and forming dry steam.
The heating element 10 and the steam cavity are arranged on the horizontal section oil well pipe column, the purpose of generating dry steam on the horizontal section oil well pipe column can be achieved, and the dry steam migration length can be reduced, the loss of dry steam heat is reduced, and the heat utilization efficiency is improved compared with a ground dry steam generating device.
The steam cavity in the embodiment comprises a wet steam cavity 11 and a dry steam cavity 12, wherein the inlet of the wet steam cavity 11 is communicated with the wet steam generation assembly 3, the outlet of the wet steam cavity 11 is connected with the inlet of the dry steam cavity 12, and the outlet of the dry steam cavity 12 is communicated with the outer side of the horizontal section oil well pipe column.
The purpose of setting the wet steam cavity 11 and the dry steam cavity 12 is to partition generated dry steam and wet steam, so that the wet steam is prevented from being directly discharged out of an oil well pipe column, and meanwhile, the heating length can be increased by setting the wet steam cavity 11 and the dry steam cavity 12, so that the dry steam generation efficiency is higher.
A connecting partition plate 111 is arranged at the connection position of the outlet of the wet steam cavity 11 and the inlet of the dry steam cavity 12, and a plurality of axial through holes for steam to pass through are arranged on the connecting partition plate 111. A one-way valve 112 is arranged in each axial through hole, and the connecting partition plate 111 can effectively divide the wet steam cavity 11 and the dry steam cavity 12 to avoid mixing of dry steam and wet steam.
The heating assembly 10 is in a sleeve-shaped structure, and the inner wall of the heating assembly 10 completely covers the outer walls of the wet steam cavity 11 and the dry steam cavity 12. The heating assembly 10 in this embodiment may be formed by connecting a plurality of heating strip structures, and the inner walls of the heating strip structures are wrapped on the outer walls of the wet steam chamber 11 and the dry steam chamber 12 so as to fully heat the inner walls of the wet steam chamber 11 and the dry steam chamber 12.
It should be noted that, in this embodiment, the heating assembly 10 is further provided with the heating assembly external heat insulation layer 101, and the heating assembly external heat insulation layer 101 can avoid outward diffusion of heat of the heating assembly 10, so that heating efficiency of the heating assembly 10 to the inside wet steam cavity 11 and the inside dry steam cavity 12 can be improved, and meanwhile, influence of excessive external heat to a horizontal section oil well string of a horizontal well can be avoided.
Preferably, the downhole dry steam generating system further comprises a drainage cavity 18, which is arranged outside the wet steam cavity 11 and the dry steam cavity 12 in parallel at intervals, the wet steam cavity 11 is provided with a wet steam cavity condensate drain pipe 17 for connecting the drainage cavity 18, and the dry steam cavity 12 is provided with a dry steam cavity condensate drain pipe 16 for connecting the drainage cavity 18.
The drain cavity 18 is provided for accommodating condensed water drained from the wet steam cavity 11 and the dry steam cavity 12, and the condensed water can be recycled.
Further, the downhole dry steam generating system further comprises a circulation pump 20, an inlet of which is connected with the drainage chamber 18, and an outlet of the circulation pump 20 is connected with an inlet of the wet steam chamber 11. The circulating pump 20 is arranged to circulate condensed water to the inlet of the wet steam cavity 11, so that the purpose of saving water resources is achieved.
In this embodiment, a packer 9 for packing a horizontal section of well string is provided at the inlet of the wet steam chamber 11, and a circulation pump 20 is provided at the packer 9. The packer 9 divides the horizontal section from the vertical section, so that the well bore above the packer 9 can be kept in a relatively low-temperature environment, the influence of thermal effect on the strength and deformation of the sleeve is reduced, the lifting amount of a well head is reduced, the safety of the well bore is ensured, and the safe service time of the well bore is prolonged.
In this embodiment, the vertical section is provided with a shaft 6, a heat insulating layer 7 and a shaft heat insulating pipe 8, the shaft heat insulating pipe 8 is sleeved with the heat insulating layer 7, and both the heat insulating layer 7 and the shaft heat insulating pipe 8 are arranged in the shaft 6, and a wet steam pipeline formed by the heat insulating layer 7 and the shaft heat insulating pipe 8 is used for connecting a wellhead and an inlet of a wet steam cavity 11. A wellhead four-way 5 is arranged at the wellhead, and the wellhead four-way 5 is connected with the wet steam generating assembly 3 through a surface manifold 4.
Further, the downhole dry steam generating system further comprises a power supply and control system 1, connected to both the wet steam generating assembly 3 and the heating assembly 10. Wherein the power and control system 1 is connected to the wet steam generating assembly 3 by means of a cable 2. The power supply and control system 1 is arranged to control the operation of the wet steam generating assembly 3 and the heating assembly 10, and the response parameters can be adjusted according to different working conditions.
As shown in fig. 1, a plurality of sleeve holes 19 are formed in the pipe wall of the horizontal section oil well pipe column, the downhole dry steam generation system further comprises steam output pipes 13, the steam output pipes 13 are arranged outside the wet steam cavity 11 and the dry steam cavity 12 at intervals in parallel, the open ends of the steam output pipes 13 are communicated with the outlet of the dry steam cavity 12, the closed ends of the steam output pipes 13 are located on the inlet side of the wet steam cavity 11, and a plurality of steam output holes 14 communicated with the sleeve holes 19 are formed in the pipe wall of the steam output pipe 13. The steam output pipe 13 and the steam output hole 14 are arranged, so that dry steam can be conveniently discharged out of the horizontal section oil well pipe column through the sleeve hole 19 for displacement.
Preferably, a dry steam chamber 15 for dry steam buffering is provided between the open end of the steam output pipe 13 and the outlet of the dry steam chamber 12. The dry steam chamber 15 can reduce the steam pressure at the outlet of the dry steam chamber 12, so that the overall pressure is at a set pressure value, and the purpose of stable oil displacement is realized.
The embodiment works specifically:
The embodiment adopts industrial electricity to supply power, and the wet steam generating assembly 3, the heating assembly 10 and the circulating pump 20 are all controlled by the power supply and control system 1. The control signal is controlled by the cable 2 or wirelessly. The wet steam generated by the wet steam generating assembly 3 enters the wet steam cavity 11 through the ground manifold 4, the wellhead four-way joint 5 and the shaft heat insulation pipe 8, and enters the dry steam cavity 12 to form dry steam after being heated by the heating assembly 10, the condensed water is discharged by the dry steam cavity condensed water discharge pipe 16 and the wet steam cavity condensed water discharge pipe 17 to enter the water discharge cavity 18, the end parts of the dry steam cavity condensed water discharge pipe 16 and the wet steam cavity condensed water discharge pipe 17 are all check valves, liquid can enter the water discharge cavity 18 from the wet steam cavity 11 or the dry steam cavity 12, and the liquid in the water discharge cavity 18 cannot enter the wet steam cavity 11 or the dry steam cavity 12. The liquid in the drainage cavity 18 enters the wet steam cavity 11 through the circulating pump 20, and the wet steam is formed again after being heated by the heating component 10, so that the recycling of the liquid is realized, and other equipment is not needed to drain the ground. The dry steam enters the steam output pipe 13, enters the production sleeve through the steam output hole 14, enters the stratum through the sleeve hole 19, heats the oil layer to reduce the viscosity of the thick oil, and simultaneously drives the thick oil in the rock pores to flow forwards, so that the steam flooding effect is realized.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the heating element 10 and the steam cavity are arranged on the horizontal section oil well pipe column, the purpose of generating dry steam on the horizontal section oil well pipe column can be achieved, and the dry steam migration length can be reduced, the loss of dry steam heat is reduced, and the heat utilization efficiency is improved compared with a ground dry steam generating device.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (8)
1. A downhole dry steam generation system for placement in a horizontal well, the downhole dry steam generation system comprising:
A wet steam generation assembly (3) which is arranged on the ground and can generate wet steam;
the steam cavity is arranged on the horizontal section oil well pipe column of the horizontal well, the inlet of the steam cavity is communicated with the outlet of the wet steam generation assembly (3) through a connecting pipeline, and the outlet of the steam cavity is communicated with the outer side of the horizontal section oil well pipe column;
The heating component (10) is coated on the outer side of the steam cavity and is arranged in the horizontal section oil well pipe column, and the heating component (10) can heat the wet steam in the steam cavity and form dry steam;
The steam cavity comprises a wet steam cavity (11) and a dry steam cavity (12), an inlet of the wet steam cavity (11) is communicated with the wet steam generation assembly (3), an outlet of the wet steam cavity (11) is connected with an inlet of the dry steam cavity (12), and an outlet of the dry steam cavity (12) is communicated with the outer side of the horizontal section oil well pipe column;
The connection part of the outlet of the wet steam cavity (11) and the inlet of the dry steam cavity (12) is provided with a connection baffle plate, and the connection baffle plate is provided with a plurality of axial through holes for steam to pass through.
2. A downhole dry steam generating system according to claim 1, wherein the heating assembly (10) is of a sleeve-like structure, the inner wall of the heating assembly (10) completely enveloping the outer walls of the wet steam chamber (11) and the dry steam chamber (12).
3. The downhole dry steam generating system according to claim 1, further comprising a drainage chamber (18) arranged in parallel with the outside of the wet steam chamber (11) and the dry steam chamber (12), the wet steam chamber (11) being provided with a wet steam chamber condensate drain (17) for connecting the drainage chamber (18), the dry steam chamber (12) being provided with a dry steam chamber condensate drain (16) for connecting the drainage chamber (18).
4. A downhole dry steam generating system according to claim 3, further comprising a circulation pump (20), the inlet being connected to the drainage chamber (18), the outlet of the circulation pump (20) being connected to the inlet of the wet steam chamber (11).
5. A downhole dry steam generating system according to claim 4, wherein a packer (9) for sealing off the horizontal section of the well string is provided at the inlet of the wet steam chamber (11), and a circulation pump (20) is provided at the packer (9).
6. The downhole dry steam generating system according to claim 1, wherein a plurality of sleeve holes (19) are formed in the pipe wall of the horizontal section oil well pipe column, the downhole dry steam generating system further comprises steam output pipes (13), the steam output pipes (13) are arranged outside the wet steam cavity (11) and the dry steam cavity (12) at intervals in parallel, the open ends of the steam output pipes (13) are communicated with the outlet of the dry steam cavity (12), the closed ends of the steam output pipes (13) are located on the inlet side of the wet steam cavity (11), and a plurality of steam output holes (14) communicated with the sleeve holes (19) are formed in the pipe wall of the steam output pipes (13).
7. A downhole dry steam generating system according to claim 6, wherein a dry steam chamber (15) for dry steam buffering is arranged between the open end of the steam output pipe (13) and the outlet of the dry steam chamber (12).
8. A downhole dry steam generating system according to claim 1, further comprising a power supply and control system (1) connected to both the wet steam generating assembly (3) and the heating assembly (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716523.1A CN113883490B (en) | 2020-07-23 | 2020-07-23 | Downhole dry steam generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716523.1A CN113883490B (en) | 2020-07-23 | 2020-07-23 | Downhole dry steam generation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113883490A CN113883490A (en) | 2022-01-04 |
| CN113883490B true CN113883490B (en) | 2024-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010716523.1A Active CN113883490B (en) | 2020-07-23 | 2020-07-23 | Downhole dry steam generation system |
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| Country | Link |
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| CN (1) | CN113883490B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2621991A1 (en) * | 2008-02-21 | 2008-11-19 | Imperial Oil Resources Limited | Method and system for generating steam in the oil industry |
| CN105545269A (en) * | 2015-12-15 | 2016-05-04 | 中国石油大学(北京) | Intelligent respiratory function training device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205297511U (en) * | 2015-12-29 | 2016-06-08 | 中国石油天然气股份有限公司 | Underground electric heating steam generating device |
| CN207795208U (en) * | 2018-01-11 | 2018-08-31 | 中国石油天然气股份有限公司 | Process pipe column for improving dryness of underground steam |
| CN111322045A (en) * | 2020-03-03 | 2020-06-23 | 西南石油大学 | A method for improving the dryness of bottom steam in deep well heavy oil by using electric heating |
| CN213597941U (en) * | 2020-04-15 | 2021-07-02 | 中国石油天然气股份有限公司 | Downhole steam heating device and steam injection pipe column |
-
2020
- 2020-07-23 CN CN202010716523.1A patent/CN113883490B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2621991A1 (en) * | 2008-02-21 | 2008-11-19 | Imperial Oil Resources Limited | Method and system for generating steam in the oil industry |
| CN105545269A (en) * | 2015-12-15 | 2016-05-04 | 中国石油大学(北京) | Intelligent respiratory function training device |
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| CN113883490A (en) | 2022-01-04 |
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Effective date of registration: 20221230 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Applicant after: PetroChina Company Limited Applicant after: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Applicant after: BEIJING PETROLEUM MACHINERY Co.,Ltd. Address before: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Applicant before: PetroChina Company Limited Applicant before: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. |
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