CN214371898U - Double-layer oil sleeve type underground heat exchanger with vacuum heat insulation mechanism - Google Patents
Double-layer oil sleeve type underground heat exchanger with vacuum heat insulation mechanism Download PDFInfo
- Publication number
- CN214371898U CN214371898U CN202120119825.0U CN202120119825U CN214371898U CN 214371898 U CN214371898 U CN 214371898U CN 202120119825 U CN202120119825 U CN 202120119825U CN 214371898 U CN214371898 U CN 214371898U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- pipe
- double
- heat
- heat insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a double-layer oil sleeve type underground heat exchanger with a vacuum heat insulation mechanism, which comprises a heat exchanger body, the central pipe is arranged in the outer sleeve, circulating fluid is introduced from one side of the outer sleeve and discharged from the upper end of the central pipe after circulation, the outer pipe and the inner pipe are double-layer concentric pipe columns, the annular space of the two layers of pipes is filled with heat insulating materials, inert gas or vacuum, the outer pipe and the inner pipe are made of API standard pipes, a heat insulating system between the outer pipe and the inner pipe is a part made of superfine glass wool, the maximum use temperature can reach 400 ℃, the prestressed heat insulating oil pipe can overcome the expansion deformation caused by temperature change, the heat exchange performance is improved by 10-20 percent compared with the conventional heat exchanger on the basis of the common well cementation process, the ground heat exchange system supplies heat to the ground building, thereby achieving the development technology of the medium-deep geothermal resource which can not take water when taking heat.
Description
Technical Field
The utility model relates to a heat exchanger technical field in the pit specifically is a double-deck oil jacket tubular heat exchanger in pit with vacuum heat insulation mechanism.
Background
Geothermal resources can be divided into shallow geothermal energy, intermediate geothermal energy and ultra-deep geothermal energy. The temperature of the shallow geothermal energy is generally lower than 25 ℃ and the depth is less than 200 m; the temperature of the geothermal energy of the middle-deep layer is higher than 25 ℃, and the buried depth is generally less than 3000 m; the ultra-deep geothermal energy generally has no or few fluids, the temperature is higher than 150 ℃, and the burial depth is generally larger than 3000 m. At present, the utilization of geothermal energy in middle and deep layers mainly adopts a mode of directly exploiting geothermal water in middle and deep layers for building heat supply, namely, in areas with abundant geothermal water resources, geothermal wells are dug, underground hot water is directly extracted for building heat supply, and the underground water is directly discharged or recharged after the temperature of the underground water is utilized.
However, due to the immature development of the recharge technology, the recharge efficiency is low, a large amount of underground hot water is wasted, the underground water level is lowered year by year, underground water resources are exhausted, and the risks of disasters such as geological collapse are caused.
In order to solve the problems, a double-layer oil sleeve type downhole heat exchanger with a vacuum heat insulation mechanism is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a double-deck oil jacket tubular heat exchanger in pit with vacuum heat insulation mechanism, outer tube and inner tube are double-deck concentric tubular column, the annular space of two layers pipe fills the heat-insulating material, inert gas or vacuum, the outer tube is API standard tubular product with the inner tube material, thermal-insulated system between outer tube and the inner tube is that a material is the cotton part of superfine glass and constitutes, more conventional heat exchanger heat transfer performance improves 10% -20% on general well cementation technology basis, heat transfer system through ground supplies heat to the ground building, and then reach "do not get hot" deep geothermal resources development technique in, thereby the problem in the above-mentioned background art has been solved.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a double-deck oil jacket tubular heat exchanger in pit with vacuum heat insulation mechanism, includes the heat exchanger body, the heat exchanger body includes outer tube, dog, end cap, center tube, circulation fluid and stratum, and the dog is installed to the outer tube lower extreme, dog and outer tube swing joint, and the end cap is installed to the dog lower extreme, and the center tube is installed to the dog upper end, center tube and dog swing joint, and the inside circulation fluid that has all let in of center tube and outer tube, and the stratum is installed in the outer tube outside.
Preferably, the outer sleeve comprises a heat-preservation well-cementation cement sheath, a surface sleeve, a high-heat-conduction well-cementation cement sheath, a production sleeve and an energy gathering device, the surface sleeve is installed inside the heat-preservation well-cementation cement sheath, the high-heat-conduction well-cementation cement sheath is installed inside the surface sleeve, the production sleeve is installed inside the high-heat-conduction well-cementation cement sheath, and the energy gathering device is installed at the lower end of the production sleeve.
Preferably, the central tube comprises an outer tube, an inner tube, a heat insulation system, EU threads, a coupling and welding rings, the inner tube is arranged inside the outer tube, the heat insulation system is arranged between the inner tube and the outer tube, the EU threads are arranged at two ends of the inner tube, the coupling is arranged at the upper end of each EU thread, and the welding rings are arranged at two ends of the inner tube.
Preferably, the outer pipe and the inner pipe are double-layer concentric pipe columns, the annular space of the two layers of pipes is filled with heat insulation materials, inert gases or vacuum, the outer pipe and the inner pipe are made of API standard pipes, and a heat insulation system between the outer pipe and the inner pipe is composed of components made of superfine glass wool.
Preferably, the plug is internally provided with a cavity, one side of the cavity is provided with an injection hole, the cavity is internally injected with filling liquid, and two sides of the inner cavity of the plug are provided with internal threads.
Preferably, the lower end of the plug is of a 120-degree tapered inverted cone structure, the filling liquid is ethanol, and the ethanol does not fill the whole cavity.
Preferably, the stop block comprises a block body and an external thread, the external thread is arranged on the outer side of the block body, and the external thread is matched with the internal thread.
Preferably, the block is three and outer bushing connection, is the part that 120 distributes, and every block is a ladder piece that goes up the ladder and slightly short, and the ladder piece is slightly long down, the last ladder center tube clearance fit of ladder piece.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model provides a double-layer oil sleeve type underground heat exchanger with a vacuum heat insulation mechanism, the central pipe is arranged in the outer sleeve, circulating fluid is introduced from one side of the outer sleeve and discharged from the upper end of the central pipe after circulation, the outer pipe and the inner pipe are double-layer concentric pipe columns, the annular space of the two layers of pipes is filled with heat insulating materials, inert gas or vacuum, the outer pipe and the inner pipe are made of API standard pipes, a heat insulating system between the outer pipe and the inner pipe is a part made of superfine glass wool, the maximum use temperature can reach 400 ℃, the prestressed heat insulating oil pipe can overcome the expansion deformation caused by temperature change, the heat exchange performance is improved by 10-20 percent compared with the conventional heat exchanger on the basis of the common well cementation process, the ground heat exchange system supplies heat to the ground building, thereby achieving the development technology of the medium-deep geothermal resource which can not take water when taking heat.
2. The utility model provides a pair of double-deck oil jacket tubular heat exchanger in pit with vacuum heat insulation mechanism, end cap internally mounted has the cavity, the filling hole has been seted up to cavity one side, the inside injection of cavity has the filling liquid, the internal thread has all been seted up to end cap inner chamber both sides, the end cap lower extreme is a tapered back taper type structure of 120, can effectively improve the centering ability of deep layer "binocular sleeve pipe" type heat exchanger in the geothermol power shaft bottom, the filling liquid is the ethanol, whole cavity is not filled to ethanol, the heat transfer of ethanol through the end cap lower extreme, and the evaporation heat absorption, it is exothermic to meet the convex structure condensation of the lower end cap upper end of temperature, so constantly follow the end cap lower extreme heat absorption, it is exothermic to the end cap upper end, the heat exchange efficiency of deep double-cylinder jacket tubular heat exchanger in pit is improved.
3. The utility model provides a pair of double-deck oil jacket tubular heat exchanger in pit with vacuum heat insulation mechanism, the dog includes block and external screw thread, the block is three and outer bushing, be the part of 120 distributions, and every block is a little weak point of going up the ladder, the ladder piece that the ladder is slightly long down, the last ladder center tube clearance fit of ladder piece, the external screw thread has been seted up in the block outside, external screw thread and internal thread phase-match, make it all reach radial centering's effect, convenient to detach and maintenance again, the lower ladder of ladder piece stretches into the pipe wall bottom of center tube, carry out well orientation to the center tube.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the outer tube structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the outer tube according to the present invention;
FIG. 4 is a schematic structural view of the center tube of the present invention;
FIG. 5 is a schematic view of the plug structure of the present invention;
FIG. 6 is a schematic view of the stopper structure of the present invention;
fig. 7 is a schematic view of the distribution of the stoppers of the present invention.
In the figure: 1. a heat exchanger body; 11. an outer sleeve; 111. heat preservation and well cementation cement sheath; 112. a surface casing; 113. high heat conduction well cementation cement sheath; 114. producing a sleeve; 115. an energy gathering device; 12. a stopper; 121. a block body; 122. an external thread; 13. a plug; 131. a cavity; 132. an injection hole; 133. filling liquid; 134. an internal thread; 14. a central tube; 141. an outer tube; 142. an inner tube; 143. an insulation system; 144. EU threads; 145. a coupling; 146. welding a ring; 15. circulating a fluid; 16. the earth formation.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, a double-layer oil jacket type downhole heat exchanger with a vacuum heat insulation mechanism comprises a heat exchanger body 1, wherein the heat exchanger body 1 comprises an outer jacket 11, a stopper 12, a plug 13, a central pipe 14, a circulating fluid 15 and a stratum 16, the outer jacket 11 comprises a heat preservation well cementation cement ring 111, a surface layer jacket 112, a high heat conduction well cementation cement ring 113, a production jacket 114 and an energy gathering device 115, the surface layer jacket 112 is arranged in the heat preservation well cementation cement ring 111, the high heat conduction well cementation cement ring 113 is arranged in the surface layer jacket 112, the production jacket 114 is arranged in the high heat conduction well cementation ring 113, the energy gathering device 115 is arranged at the lower end of the production jacket 114, the stopper 12 is arranged at the lower end of the outer jacket 11, the stopper 12 is movably connected with the outer jacket 11, the plug 13 is arranged at the lower end of the stopper 12, the central pipe 14 is arranged at the upper end of the stopper 12, the central pipe 14 comprises an outer pipe 141, a central pipe 141, An inner pipe 142 is arranged inside an outer pipe 141, the outer pipe 141 and the inner pipe 142 are double-layer concentric pipe columns, the annular space of the two layers of pipes is filled with heat insulation materials, inert gases or vacuum, the outer pipe 141 and the inner pipe 142 are made of API standard pipes, the heat insulation system 143 between the outer pipe 141 and the inner pipe 142 is made of ultra-fine glass wool, the maximum use temperature can reach 400 ℃, the prestressed heat insulation oil pipe can overcome the expansion deformation caused by temperature change, the heat insulation system 143 is arranged between the inner pipe 142 and the outer pipe 141, both ends of the inner pipe 142 are provided with the EU threads 144, the upper end of the EU threads 144 is provided with a coupling 145, both ends of the inner pipe 142 are provided with welding rings 146, a central pipe 14 is movably connected with a stop block 12, circulating fluid 15 is introduced into the central pipe 14 and an outer sleeve 11, and a stratum 16 is arranged outside the outer sleeve 11, a central pipe 14 is arranged in the outer sleeve 11, circulating fluid 15 is introduced from one side of the outer sleeve 11 and is discharged from the upper end of the central pipe 14 after being circulated, the heat exchange performance of the heat exchanger is improved by 10-20% compared with that of a conventional heat exchanger on the basis of a common well cementation process, heat is supplied to a ground building through a ground heat exchange system, and further the development technology of mid-deep geothermal resources without water is achieved.
Referring to fig. 5, a cavity 131 is installed inside the plug 13, an injection hole 132 is formed in one side of the cavity 131, a filling liquid 133 is injected into the cavity 131, the lower end of the plug 13 is a 120-degree tapered inverted cone structure, the centering capability of the double-tube underground heat exchanger in the middle-deep layer at the bottom of a geothermal well can be effectively improved, the filling liquid 133 is ethanol, the whole cavity 131 is not filled with the ethanol, internal threads 134 are formed in two sides of an inner cavity of the plug 13, the ethanol absorbs heat through heat transfer at the lower end of the plug 13 and evaporation, and heat is released when encountering the circular arc structure at the upper end of the plug 13 with lower temperature, so that heat is continuously absorbed from the lower end of the plug 13 to release heat at the upper end of the plug 13, and the heat exchange efficiency of the double-tube underground heat exchanger in the middle-deep layer is improved.
Referring to fig. 6-7, the stopper 12 includes three blocks 121 and external threads 122, the three blocks 121 are connected to the outer sleeve 11 and are distributed at 120 °, each block 121 is a stepped block with a slightly short upper step and a slightly long lower step, the upper stepped central tube 14 of the stepped block is in clearance fit, the external threads 122 are formed on the outer side of the block 121, and the external threads 122 are matched with the internal threads 134, so that the block can achieve the radial centering effect and is convenient to detach and maintain, and the lower step of the stepped block extends into the bottom of the tube wall of the central tube 14 to position the central tube 14 in the well direction.
In summary, the following steps: the utility model provides a double-deck oil jacket tubular heat exchanger in pit with vacuum heat insulation mechanism, install center tube 14 in outer tube 11, let in circulating fluid 15 from outer tube 11 one side, discharge by the center tube 14 upper end after the circulation, outer tube 141 and inner tube 142 are double-deck concentric tubular column, the annular space of two layers of pipes fills thermal insulation material, inert gas or vacuum, outer tube 141 and inner tube 142 material are API standard tubular product, the thermal insulation system 143 between outer tube 141 and inner tube 142 is a part composition that the material is superfine glass wool, the maximum service temperature can reach 400 ℃, prestressing force thermal-insulated oil pipe can overcome the flexible deformation that takes place because of the temperature change, heat exchange performance improves 10% -20% on the basis of general well cementation technology than conventional heat exchanger, heat supply to the ground building through the water heat transfer system on ground, and then reach "get heat not deep ground layer" geothermal resource development technique, the lower end of the plug 13 is a 120-degree taper inverted cone structure, the centering capability of the double-cylinder sleeve type underground heat exchanger at the bottom of a geothermal well can be effectively improved, the filling liquid 133 is ethanol which does not fill the whole cavity 131, the ethanol is subjected to heat transfer through the lower end of the plug 13, is evaporated and absorbs heat, and is condensed and releases heat when encountering the arc structure at the upper end of the plug 13 with lower temperature, so that heat is continuously absorbed from the lower end of the plug 13 to the upper end of the plug 13, the heat exchange efficiency of the double-cylinder sleeve type underground heat exchanger at the middle depth is improved, the blocks 121 are three parts which are connected with the outer sleeve 11 and distributed at 120 degrees, each block 121 is a step block with slightly short upper step and slightly long lower step, the central upper step pipe 14 of the step block is in clearance fit, the upper step of the step block can achieve the radial centering effect, and is convenient to detach and maintain, and the lower step of the step block extends to the bottom of the central pipe 14, base pipe 14 is positioned downhole.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a double-deck oil jacket tubular heat exchanger in pit with vacuum heat insulation mechanism, includes heat exchanger body (1), its characterized in that: the heat exchanger body (1) comprises an outer sleeve (11), a stop block (12), a plug (13), a central tube (14), circulating fluid (15) and a stratum (16), the stop block (12) is installed at the lower end of the outer sleeve (11), the stop block (12) is movably connected with the outer sleeve (11), the plug (13) is installed at the lower end of the stop block (12), the central tube (14) is installed at the upper end of the stop block (12), the central tube (14) is movably connected with the stop block (12), the circulating fluid (15) is led into the central tube (14) and the outer sleeve (11), and the stratum (16) is installed on the outer side of the outer sleeve (11).
2. The double-layer oil jacket type downhole heat exchanger with the vacuum heat insulation mechanism according to claim 1, wherein: the outer sleeve (11) comprises a heat-preservation well cementation cement sheath (111), a surface layer sleeve (112), a high heat-conduction well cementation cement sheath (113), a production sleeve (114) and an energy gathering device (115), wherein the heat-preservation well cementation cement sheath (111) is internally provided with the surface layer sleeve (112), the surface layer sleeve (112) is internally provided with the high heat-conduction well cementation cement sheath (113), the high heat-conduction well cementation cement sheath (113) is internally provided with the production sleeve (114), and the energy gathering device (115) is arranged at the lower end of the production sleeve (114).
3. The double-layer oil jacket type downhole heat exchanger with the vacuum heat insulation mechanism according to claim 1, wherein: the central tube (14) comprises an outer tube (141), an inner tube (142), a heat insulation system (143), EU threads (144), a coupling (145) and welding rings (146), wherein the inner tube (142) is arranged inside the outer tube (141), the heat insulation system (143) is arranged between the inner tube (142) and the outer tube (141), the EU threads (144) are arranged at two ends of the inner tube (142), the coupling (145) is arranged at the upper end of the EU threads (144), and the welding rings (146) are arranged at two ends of the inner tube (142).
4. The double-layer oil jacket type downhole heat exchanger with the vacuum heat insulation mechanism according to claim 3, wherein: the outer pipe (141) and the inner pipe (142) are double-layer concentric pipe columns, the annular space of the two layers of pipes is filled with heat insulation materials, inert gases or vacuum, the outer pipe (141) and the inner pipe (142) are made of API standard pipes, and a heat insulation system (143) between the outer pipe (141) and the inner pipe (142) is composed of components made of superfine glass wool.
5. The double-layer oil jacket type downhole heat exchanger with the vacuum heat insulation mechanism according to claim 1, wherein: the plug (13) is internally provided with a cavity (131), an injection hole (132) is formed in one side of the cavity (131), filling liquid (133) is injected into the cavity (131), and internal threads (134) are formed in two sides of an inner cavity of the plug (13).
6. The double-layer oil jacket type downhole heat exchanger with the vacuum heat insulation mechanism according to claim 1, wherein: the lower end of the plug (13) is of a 120-degree tapered inverted cone structure, the filling liquid (133) is ethanol, and the whole cavity (131) is not filled with the ethanol.
7. The double-layer oil jacket type downhole heat exchanger with the vacuum heat insulation mechanism according to claim 1, wherein: the stop block (12) comprises a block body (121) and an external thread (122), the external thread (122) is arranged on the outer side of the block body (121), and the external thread (122) is matched with the internal thread (134).
8. The double-layer oil jacket type downhole heat exchanger with the vacuum heat insulation mechanism according to claim 7, wherein: the block bodies (121) are three parts which are connected with the outer sleeve (11) and distributed at 120 degrees, each block body (121) is a stepped block with an upper step slightly short and a lower step slightly long, and an upper stepped central tube (14) of each stepped block is in clearance fit with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120119825.0U CN214371898U (en) | 2021-01-18 | 2021-01-18 | Double-layer oil sleeve type underground heat exchanger with vacuum heat insulation mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120119825.0U CN214371898U (en) | 2021-01-18 | 2021-01-18 | Double-layer oil sleeve type underground heat exchanger with vacuum heat insulation mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214371898U true CN214371898U (en) | 2021-10-08 |
Family
ID=77956425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120119825.0U Active CN214371898U (en) | 2021-01-18 | 2021-01-18 | Double-layer oil sleeve type underground heat exchanger with vacuum heat insulation mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214371898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216372A1 (en) * | 2022-05-12 | 2023-11-16 | 等熵循环(北京)新能源科技有限公司 | Medium-deep geothermal guiding pipe having combined vacuum cavities with support structure |
-
2021
- 2021-01-18 CN CN202120119825.0U patent/CN214371898U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216372A1 (en) * | 2022-05-12 | 2023-11-16 | 等熵循环(北京)新能源科技有限公司 | Medium-deep geothermal guiding pipe having combined vacuum cavities with support structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101832673B (en) | Method and device for conducting and recycling subterranean heat with production casings | |
| WO2020113914A1 (en) | Process for improving heat production capacity of geothermal well | |
| CN206478882U (en) | A kind of U-shaped well deep geothermal heat conduction-convection problem | |
| CN112682974B (en) | Gravity heat pipe underground heat exchange system for exploiting geothermal energy of dry hot rock and construction method | |
| WO2018014609A1 (en) | Jet grouting soil-cement-pile strengthened pile system for combined cooling, heat and power generation and construction method therefor | |
| CN110657594A (en) | Closed circulation deep geothermal energy exploitation system | |
| CN214371898U (en) | Double-layer oil sleeve type underground heat exchanger with vacuum heat insulation mechanism | |
| CN109140808B (en) | Coaxial buried pipe type underground heat exchanger for medium-deep layer geothermal well | |
| CN111664602A (en) | Bending geothermal well | |
| CN112923592A (en) | High-efficient coaxial heat transfer device of middle-deep layer noiseless geothermal energy | |
| CN111365753A (en) | Solar energy coupling enhancement mode deep well heat exchanger heating system | |
| CN107477895A (en) | Mid-deep strata underground heat bore hole heat exchanger | |
| CN105546860A (en) | Device and method for extracting and using geothermal energy | |
| CN111664601B (en) | Deep geothermal well structure and modification method of waste geothermal well | |
| CN111365871B (en) | Enhanced deep well heat exchanger | |
| CN207247601U (en) | A kind of ground can hot dry rock heat-exchanger rig | |
| CN216076997U (en) | Large-caliber middle-deep concentric tube heat exchange well body structure | |
| CN112303942B (en) | Hot dry rock non-fracturing butt well heat taking device | |
| CN207317302U (en) | A kind of ground can the tree-shaped multiple spot heat-exchange system of hot dry rock | |
| CN113124579A (en) | Non-interference underground heat exchanger for changing abandoned well into geothermal well | |
| CN208518614U (en) | A kind of ocean insulated tubing | |
| CN208952448U (en) | A kind of geothermal well two-pipe system | |
| CN207515263U (en) | Mid-deep strata underground heat bore hole heat exchanger | |
| CN111894547A (en) | Heat exchange type horizontal well, heat exchange type cross orthogonal horizontal well factory and construction method | |
| CN215951809U (en) | Double-wall heat-insulation water intake pipe for return section of geothermal well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |