CN114320233B - Heating device and method for deep sea hydrate production pipe column - Google Patents

Heating device and method for deep sea hydrate production pipe column Download PDF

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Publication number
CN114320233B
CN114320233B CN202111655787.1A CN202111655787A CN114320233B CN 114320233 B CN114320233 B CN 114320233B CN 202111655787 A CN202111655787 A CN 202111655787A CN 114320233 B CN114320233 B CN 114320233B
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China
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power generation
heating
sleeve
hydrate production
deep sea
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CN202111655787.1A
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Chinese (zh)
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CN114320233A (en
Inventor
李清平
李中
何玉发
庞维新
黄婷
宋金泽
朱军龙
刘畅
刘永飞
宋本健
周云健
樊奇
葛阳
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

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  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The application belongs to the technical field of energy development, and relates to a heating device and a heating method for a deep sea hydrate production string, wherein the heating device comprises the following steps: the device comprises a sleeve, at least two power generation modules and a heating module, wherein the sleeve is used for fixing the power generation modules and the heating modules with a hydrate production string; the power generation module and the heating module are both sleeved on the sleeve, the heating module is arranged between the two power generation modules, and the power generation module is connected with the heating module through a power transmission line and supplies power for the heating module. According to the application, the heating module is arranged to avoid secondary hydrate formation in the exploitation process, and the power generation modules with the blades are arranged in multiple layers, so that wave energy with different fluctuation can be effectively captured, and stable electric energy is provided for the device.

Description

Heating device and method for deep sea hydrate production pipe column
Technical Field
The application relates to a heating device and a heating method for a deep sea hydrate production string, belongs to the technical field of energy development, and particularly relates to the technical field of deep sea hydrate development.
Background
With the continuous development of society, the consumption of traditional energy coal, petroleum and the like is increasing. Searching for new and efficient clean energy becomes a necessary premise for the current social development. The appearance of natural gas hydrate, which is formed under the special conditions of high pressure and low temperature, is similar to ice solid crystallization substances of non-traditional types, and is likely to change the existing world energy pattern. The natural gas hydrate has the advantages of wide distribution, shallow burial depth, small pollution after combustion and the like. According to the data, the resource reserve of the natural gas hydrate is twice that of the traditional energy reserve and is an important energy source in the future in the world, so that the efficient and safe development of the deep sea hydrate resource is quickened, and the ocean resource is fully utilized.
At present, the collection of the deep sea hydrate is mainly realized through a deep sea hydrate production pipe column, the flow state in the deep sea hydrate production pipe column is complex, solid, liquid and gas coexist, but the hydrate is easy to form a hydrate for the second time under the mixed state of multicomponent natural gas due to the memory effect, and a plurality of energies such as wind energy, tidal energy, wave energy, ocean current energy and the like exist in the deep sea, so that the heave and heave motions of ocean waves can be influenced by various energies and lack of regularity. The deep sea hydrate production string is usually powered by using the energy of sea waves, but the power supplied by the sea waves is unstable due to the fact that the energy of the sea waves is not regular, and the deep sea hydrate production string cannot be used, and the weight and cost of the device are obviously increased due to the fact that a battery management system or an energy storage device is arranged, so that the deep sea hydrate exploitation is not facilitated.
Disclosure of Invention
In view of the above problems, it is an object of the present application to provide a heating apparatus and method for a deep sea hydrate production string, which avoids secondary hydrate formation during the production process by providing a heating module.
In order to achieve the above purpose, the present application proposes the following technical solutions: a heating device for a deep sea hydrate production string, comprising: the device comprises a sleeve, at least two power generation modules and a heating module, wherein the sleeve is used for fixing the power generation modules and the heating modules with a hydrate production string; the power generation module and the heating module are both sleeved on the sleeve, the heating module is arranged between the two power generation modules, and the power generation module is connected with the heating module through a power transmission line and supplies power for the heating module.
Further, the power generation module comprises a power generation coil, a blade bearing and a power generation blade sleeve, wherein the power generation coil is wound on the sleeve, the blade bearing sleeve is arranged outside the power generation coil, the power generation coil is wrapped in the blade bearing, and the power generation blade sleeve is arranged on the blade bearing.
Further, the power transmission lines of the power generation module are respectively arranged at the upper end and the lower end of the sleeve.
Further, a pair of magnetic poles are arranged between the power generation blade sleeve and the blade bearing, and the two magnetic poles are symmetrically arranged relative to the axis of the blade bearing.
Further, the axial length of the power generation coil is the same as that of the power generation blade sleeve.
Further, a plurality of evenly distributed power generation blades are arranged on the power generation blade sleeve, and the power generation blades are flat shaft blades.
Further, the heating module comprises a heating electrode coil wound outside the sleeve and a waterproof sleeve wrapped outside the heating electrode coil.
The application also discloses a heating method of the deep sea hydrate production pipe column, which comprises the following steps: a heating device for installing any one of the above deep sea hydrate production strings; sleeving a heating device on the outer side of a hydrate production pipe column and placing the heating device in a marine environment; when ocean currents flow through the sleeve and have attack angles with the power generation blades, the seawater impacts the power generation blades to generate torque, and the power generation blades are pushed to rotate around the sleeve, so that current is generated; the current generated by the generating blades passes through the generating coil so that the heating electrode coil generates heat to heat the hydrate production string.
Due to the adoption of the technical scheme, the application has the following advantages:
1. according to the application, the heating module is arranged to avoid secondary hydrate formation in the exploitation process, and the power generation modules with the blades are arranged in multiple layers, so that wave energy with different fluctuation can be effectively captured, and stable electric energy is provided for the device.
2. The application fully utilizes ocean currents to independently generate power, effectively solves the problem of deep sea power generation, not only has the power generation mode of green and environment-friendly, but also solves the problem of heating energy consumption of the hydrate production pipe column, and prevents the secondary generation of the hydrate.
3. The power generation blade can rotate under the impact of ocean currents, and is suitable for complex and changeable ocean environments.
Drawings
FIG. 1 is a schematic view showing the structure of a heating apparatus for a deep sea hydrate production string according to an embodiment of the present application;
FIG. 2 is a schematic view showing an internal structure of a heating apparatus according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a heating module in accordance with an embodiment of the present application;
FIG. 4 is a top view of a heating device in an embodiment of the application;
FIG. 5 is a simulated graph of tidal current flow rate over time over a half-day period in accordance with one embodiment of the present application;
FIG. 6 is a graph illustrating the variation of the power coefficient of a blade tip speed ratio according to an embodiment of the present application.
Reference numerals:
1-a deep sea hydrate production string; 2-a sleeve; 3-a power generation module; 4-a heating module; 5-blade bearings; 6-a power generation blade sleeve; 7-generating blades; 8-a water-stop sleeve; 9-generating coils; 10-heating an electrode coil; 11-pole.
Detailed Description
The present application will be described in detail with reference to specific examples thereof in order to better understand the technical direction of the present application by those skilled in the art. It should be understood, however, that the detailed description is presented only to provide a better understanding of the application, and should not be taken to limit the application. In the description of the present application, it is to be understood that the terminology used is for the purpose of description only and is not to be interpreted as indicating or implying relative importance.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two components. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Aiming at the condition that the hydrate is easy to form secondarily in deep sea, and in the deep sea operation, a power supply such as a storage battery is carried, on the one hand, the weight of the deep sea hydrate production pipe column 1 can be obviously increased, on the other hand, the deep sea operation can take a long time, the power supply cannot be charged, the hydrate exploitation can not be completed, and the power supply is not powered. And the adoption of power sources such as a storage battery and the like requires additional energy consumption, so that the energy-saving and environment-friendly effects are not achieved. The application provides a heating device and a heating method for a deep sea hydrate production pipe column 1, wherein the device heats the deep sea hydrate production pipe column 1 through the heating device, so that hydrate formation caused by excessively low temperature of the production pipe column is avoided, and kinetic energy of sea waves is converted into electric energy through the arrangement of a power generation blade 7 and is transmitted to the heating device to supply power for the heating device. The application fully utilizes ocean currents to independently generate power, effectively solves the problem of deep sea power generation, not only has the power generation mode of green and environment-friendly, but also solves the problem of heating energy consumption of the hydrate production pipe column, and prevents the secondary generation of the hydrate.
Fig. 1 is a schematic structural diagram of a heating apparatus for a deep sea hydrate production string 1 according to an embodiment of the present application, as shown in fig. 1, the heating apparatus for a deep sea hydrate production string 1 according to the present embodiment includes: the device comprises a sleeve 2, two power generation modules 3 and a heating module 4, wherein the sleeve 2 is sleeved on a hydrate production pipe column and is used for fixing the power generation modules 3 and the heating module 4 on the deep sea hydrate production pipe column 1; the power generation module 3 and the heating module 4 are both sleeved on the sleeve 2, the heating module 4 is arranged between the two power generation modules 3, namely, the two power generation modules 3 are arranged at two ends of the sleeve 2, and the heating module 4 is arranged in the middle of the sleeve 2. However, the number of the power generation modules 3 may be two or more, and may be determined by the number of the heating modules 4. The power generation module 3 is connected with the heating module 4 through power lines and supplies power to the heating module 4, and the power lines of the power generation module 3 are respectively arranged at the upper end and the lower end of the sleeve 2 and buried in an internal power line channel.
Fig. 1 is an external structural view of a heating apparatus of a deep sea hydrate production string 1, i.e., a part which can be seen from the external appearance of the heating apparatus. It can be derived from fig. 1 that the power generation module 3 includes a blade bearing 5, the blade bearing 5 is sleeved on the sleeve 2, a power generation blade sleeve 6 is further sleeved on the blade bearing 5, the number of power generation blades 7 on the power generation blade sleeve 6 is plural, and the power generation blades are uniformly distributed on the periphery of the power generation blade sleeve 6, and the power generation blade sleeve 6 can rotate around the blade bearing 5. The power generating blades 7 may be flat shaft blades having a height in accordance with the axial height of the blade bearing 5. However, the power generation blades 7 may be corrugated blades, but flat shaft blades are preferable in this embodiment. In the present embodiment, the number of the power generation blades 7 is four, but may be set as needed, and the present application is not limited thereto.
The heating module 4 comprises a water-proof sleeve 8, the water-proof sleeve 8 is sleeved outside the sleeve 2 and is used for wrapping a heating electrode coil 10 therein, and the specific situation of the heating electrode coil 10 is shown in fig. 2.
Fig. 2 is an internal structural view of the heating apparatus of the deep sea hydrate production string 1, and it can be seen from fig. 2 that a power generation coil 9 is provided in the blade bearing 5, the power generation coil 9 is spirally wound around the sleeve 2, and the axial length of the power generation coil 9 is the same as the axial length of the blade bearing 5 and the axial length of the power generation blade sleeve 6. A pair of magnetic poles 11 are arranged between the power generation blade sleeve 6 and the blade bearing 5, and the two magnetic poles 11 are symmetrically arranged relative to the axis of the blade bearing 5. The heating module 4 further comprises a heating electrode coil 10, which heating electrode coil 10 is also helically wound on the sleeve 2 as is the power generation coil 9. I.e. the two ends of the sleeve 2 are sleeved with spiral generating coils 9, and the middle part of the sleeve 2 is provided with spiral heating electrode coils 10.
Fig. 3 is a schematic structural view of the heating module 4 according to an embodiment of the present application, and it can be seen from fig. 3 that the waterproof sleeve is sleeved outside the spiral heating electrode coil 10. In the present embodiment, the heating electrode coil 10 is described as an example, but the heating electrode coil 10 is the most conventional heating element, but other conventional heating methods may be adopted, as long as heating can be performed by energization.
Fig. 4 is a top view of a heating apparatus in an embodiment of the application, and fig. 4 is introduced in the embodiment section to illustrate the internal and external mounting relationship of the individual components. As shown in fig. 4, the deep sea hydrate production string 1 is arranged at the innermost part, the sleeve 2 is arranged outside the deep sea hydrate production string 1, and the sleeve 2 is sleeved on the outer diameter of the deep sea hydrate production string 1. I.e. there is no gap between the casing 2 and the deep sea hydrate production string 1. The sleeve 2 is wound with a generator coil 9 or a heater electrode coil 10, and only the generator coil 9 is visible from the top view of fig. 4. The blade bearing 5 is sleeved outside the power generation coil 9, a pair of magnetic poles 11 are arranged outside the blade bearing 5, the magnetic poles 11 are used for generating a magnetic field, the kinetic energy of sea waves drives the blade to rotate, so that the blade cuts a magnetic induction line, current is generated through electromagnetic induction, and mechanical energy is converted into electric energy. The magnetic pole 11 is sleeved with a power generation blade sleeve 6, and four power generation blades 7 which are uniformly distributed are fixed on the magnetic pole and are used for generating torque by impacting sea water when the sea current flows through the sleeve 2 and has attack angle with the sea current, so that the power generation blade sleeve 6 is pushed to rotate around the sleeve 2.
Another embodiment of the present application discloses a heating method of a deep sea hydrate production string 1, comprising: a heating device for installing any one of the above deep sea hydrate production strings 1; firstly, a heating electrode coil 10 is sleeved in the middle of the sleeve 2, then a power generation coil 9 is symmetrically arranged up and down, the power generation coil 9 is coaxial with the heating electrode coil 10, and the power generation coil 9 and the heating electrode coil 10 are connected with each other through a power transmission line and an internal power transmission line channel. The blade bearing 5 is installed at the same height outside the power generation coil 9, a pair of magnetic poles 11 are arranged outside the blade bearing 5, and the power generation blade sleeve 6 is installed at the same height of the blade bearing 5. Finally, a water-proof sleeve 8 is arranged outside the heating electrode coil 10. Sleeving a heating device on the outer side of a hydrate production pipe column and placing the heating device in a marine environment; when ocean currents flow through the sleeve 2 and have attack angles with the power generation blades 7, the seawater impacts the power generation blades 7 to generate torque, and the power generation blade sleeve 6 is pushed to rotate around the sleeve 2 to generate current; the electric current generated by the power generation blades 7 passes through the power generation coil 9 so that the heating electrode coil 10 generates heat to heat the hydrate production string.
In this embodiment, the heating device generates electromagnetic induction through the magnetic induction lines generated by the rotary cutting magnetic poles 11 of the power generation blades 7, so that the mechanical energy of ocean waves is converted into electric energy, the power generation coil 9 conducts the current generated by the electromagnetic induction to the power transmission line, and the power transmission line supplies power to the heating module 4. The device and the heating method are particularly suitable for application occasions of ocean power generation, and the kinetic energy of the fluid is effectively converted into electric energy and then converted into heat energy to heat the production pipe column by utilizing ocean natural energy.
According to multi-physical field coupling calculation analysis, the temperature of the production string of the deep sea hydrate near the mud line is the lowest, so that the near-mud line is a high risk formation area of the hydrate, the hydrate is easy to form a hydrate secondarily due to a memory effect, and therefore, the installation of a heating device near the mud line is particularly important, the circulation efficiency of the hydrate can be improved, and the risk of the hydrate secondarily forming can be reduced.
The energy generated by the mass flow of water flowing through the area S is P:
wherein: c (C) p Is a power coefficient; ρ is the sea water density, kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the S is the radial projection area of the impeller, m 2 The method comprises the steps of carrying out a first treatment on the surface of the V is the water flow speed, m/s.
The total tidal current energy captured by one impeller in half a month is:
wherein C is p For a shaped impeller, its power coefficient C is the power coefficient p Is a function of the tip speed ratio lambda, which is the ratio of the linear speed u of the impeller rotation to the tidal flow velocity V. u=ω·r, where ω is the angular velocity at which the impeller rotates and R is the rotor radius. V (V) max Calculated as 1.1m/s for the average maximum flow amplitude; t is a half-month period, namely a big and small tide period, and is generally taken for 354.37h (14.57 days); t is t a (i)、t b (i) The impeller rotation power generation time and the rotation power generation stopping time of the impeller due to the decrease of the tide speed are the time when the impeller starts rotation power generation in one half day period. A simulated plot of tidal current flow rate over time over a half-day period is shown in fig. 5.
As shown in FIG. 6, for the H-shaped impeller, the power coefficient C is taken p The height of the impeller is 3.0m, and the diameter is 2.5m, which is 0.3. Taking the data into equations (1) and (2) yields:
the power generation efficiency eta,
according to the scheme, ocean currents are fully utilized to automatically generate electricity, the deep sea electricity generation problem is effectively solved, meanwhile, the heating energy consumption problem of a hydrate production pipe column is solved, and secondary generation of hydrates is prevented.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the application without departing from the spirit and scope of the application, which is intended to be covered by the claims. The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily appreciate variations or alternatives within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (8)

1. A heating device for a deep sea hydrate production string, comprising: a sleeve, at least two power generation modules and a heating module,
the sleeve is used for fixing the power generation module and the heating module with the hydrate production string;
the power generation module and the heating module are both sleeved on the sleeve, the heating module is arranged between the two power generation modules, and the power generation module is connected with the heating module through a power transmission line and supplies power for the heating module.
2. The heating device for a deep sea hydrate production string according to claim 1, wherein the power generation module comprises a power generation coil, a blade bearing and a sleeve, the power generation coil is wound on the sleeve, the blade bearing is sleeved outside the power generation coil, the power generation coil is wrapped in the blade bearing, and the power generation blade sleeve is sleeved on the blade bearing.
3. The heating apparatus of deep sea hydrate production string according to claim 2, wherein the power transmission lines of the power generation module are respectively provided at the upper and lower ends of the casing.
4. The heating apparatus for a deep sea hydrate production string as claimed in claim 2, wherein a pair of magnetic poles are provided between the power generation blade sleeve and the blade bearing, and two of the magnetic poles are symmetrically arranged with respect to an axis of the blade bearing.
5. The heating apparatus for a deep sea hydrate production string as claimed in claim 2, wherein the power generating coil is the same axial length as the power generating blade sleeve.
6. The heating device for a deep sea hydrate production string according to claim 4, wherein a plurality of uniformly distributed power generation blades are arranged on the power generation blade sleeve, and the power generation blades are flat shaft blades.
7. A heating apparatus for a deep sea hydrate production string as claimed in any one of claims 1 to 6, wherein the heating module comprises a heating electrode coil wound outside the casing and a water-barrier casing wrapped outside the heating electrode coil.
8. A method of heating a deep sea hydrate production string, comprising:
installing a heating device of a deep sea hydrate production string according to any one of claims 1-7;
sleeving the heating device on the outer side of the hydrate production pipe column, and placing the heating device in a marine environment;
when ocean currents flow through the sleeve and have attack angles with the power generation blades, the seawater impacts the power generation blades to generate torque so as to push the power generation blade sleeve to rotate around the sleeve to generate current;
the current generated by the generating blades passes through the generating coil so as to heat the electrode coil to generate heat and heat the hydrate production string.
CN202111655787.1A 2021-12-30 2021-12-30 Heating device and method for deep sea hydrate production pipe column Active CN114320233B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2357125Y (en) * 1998-07-09 2000-01-05 黄孟柱 Deep-well petroleum electric heater
WO2012003971A2 (en) * 2010-07-06 2012-01-12 Andritz Ritz Gmbh Underwater drive unit for offshore use having a high-voltage direct-current supply, and underwater drive system
CN106884618A (en) * 2017-03-09 2017-06-23 西南石油大学 A kind of rotary propeller type synchronous generator for installing piezoelectric patches and vibration-repressing device and method
CN111287707A (en) * 2020-02-19 2020-06-16 西南石油大学 Device and method for realizing resistance reduction of thickened oil by utilizing wake flow to generate electricity and heat seawater
CN112413913A (en) * 2020-12-09 2021-02-26 四川大学 Deep well heat exchange sleeve geothermal in-situ thermovoltaic power generation device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2693972C2 (en) * 2014-08-11 2019-07-08 Эни С.П.А. High-frequency system for extracting hydrocarbons

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2357125Y (en) * 1998-07-09 2000-01-05 黄孟柱 Deep-well petroleum electric heater
WO2012003971A2 (en) * 2010-07-06 2012-01-12 Andritz Ritz Gmbh Underwater drive unit for offshore use having a high-voltage direct-current supply, and underwater drive system
CN106884618A (en) * 2017-03-09 2017-06-23 西南石油大学 A kind of rotary propeller type synchronous generator for installing piezoelectric patches and vibration-repressing device and method
CN111287707A (en) * 2020-02-19 2020-06-16 西南石油大学 Device and method for realizing resistance reduction of thickened oil by utilizing wake flow to generate electricity and heat seawater
CN112413913A (en) * 2020-12-09 2021-02-26 四川大学 Deep well heat exchange sleeve geothermal in-situ thermovoltaic power generation device

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