CN111535781A - High-power oil well electromagnetic heating device based on superposition heat transfer - Google Patents
High-power oil well electromagnetic heating device based on superposition heat transfer Download PDFInfo
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- CN111535781A CN111535781A CN202010482830.8A CN202010482830A CN111535781A CN 111535781 A CN111535781 A CN 111535781A CN 202010482830 A CN202010482830 A CN 202010482830A CN 111535781 A CN111535781 A CN 111535781A
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- 238000012546 transfer Methods 0.000 title claims abstract description 132
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 239000003129 oil well Substances 0.000 title claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 38
- 229910052802 copper Inorganic materials 0.000 claims description 38
- 239000010949 copper Substances 0.000 claims description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 33
- 229910021389 graphene Inorganic materials 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 64
- 230000000694 effects Effects 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- -1 graphite alkene Chemical class 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
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- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a high-power oil well electromagnetic heating device based on superposition heat transfer, and relates to the technical field of heating of oil extraction wells for oil extraction. The heat reflection sleeve can reflect heat, effectively reduce heat loss, diffuse heat, enhance the uniformity of heat distribution, enable an oil pipe to be heated more uniformly, and effectively avoid blockage.
Description
Technical Field
The invention relates to the technical field of heating of oil extraction wells for oil production, in particular to a high-power oil well electromagnetic heating device based on superposition heat transfer.
Background
The oil well is a channel for exploiting oil, which rises from the bottom of the well to the top of the well according to the hole drilled by the well-arrangement system planned by the oil field development. An oil well is a borehole drilled by a drilling method. After drilling oil layer, the oil layer casing is set, and the cement is injected into the annular space between casing and well wall to maintain well wall and seal oil, gas and water layer. The number of heavy oil wells and high pour-point oil wells is increasing with the continuous deep exploitation of oil reservoirs. In the oil extraction and oil transportation process, the phenomena of solidification, wax precipitation, blockage and the like can occur in the thick oil and the high-condensation oil under the low-temperature state, so that the oil extraction and oil transportation can not be normally produced. The electromagnetic heater is the most extensive heating mode in the present industrial field and civil equipment, and its essence is that it utilizes electromagnetic induction to produce eddy current in the cylinder body to heat the workpiece, and it converts the electric energy into electromagnetic energy, then converts the electromagnetic energy into electric energy, and the electric energy is converted into heat energy in the interior of metal so as to attain the goal of heating metal, so that it is an environment-protecting heating scheme. Electromagnetic induction heating is mainly divided into induction heating of 4 frequencies: low frequency, medium frequency, super-audio frequency, high frequency. Because the electromagnetic heating ring does not generate heat and is made of insulating materials and high-temperature cables, the problem that the service life of the resistance wire of the original electric heating ring is shortened due to oxidation in a high-temperature state does not exist, the electromagnetic heating ring has the advantages of long service life, high heating rate, no need of maintenance and the like, the maintenance time is shortened, and the cost is reduced.
But current oil well electromagnetic heating device, heat transfer efficiency is low, can't be fast with in heat transfer to viscous crude and high condensate, and heat distributes not evenly enough, leads to viscous crude and high condensate to be heated unevenly, takes place blocking phenomenon easily.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a high-power oil well electromagnetic heating device based on superposition heat transfer, and the problems to be solved by the present invention are: how to strengthen oil well electromagnetic heating device's heat transfer efficiency, with heat fast transfer to in viscous crude and the high viscous crude for heat distributes more evenly, avoids producing the jam phenomenon.
In order to achieve the purpose, the invention provides the following technical scheme: a high-power oil well electromagnetic heating device based on superposition heat transfer comprises an oil pipe, a sleeve, an ultrasonic generator and a plurality of groups of electromagnetic heaters, wherein the electromagnetic heaters and the sleeve are all sleeved outside the oil pipe, the electromagnetic heaters are arranged inside the sleeve, the ultrasonic generator is arranged at the top of the outer wall of the sleeve, the output end of the ultrasonic generator extends to the top of the inner side of the sleeve, the outer wall of the oil pipe is provided with a graphene outer layer, the inner wall of the oil pipe is provided with a steel inner layer, a copper intermediate layer is arranged between the graphene outer layer and the steel inner layer, the inner wall of the sleeve is provided with a heat reflecting layer, one side, away from the heat reflecting layer, of the outer wall of the graphene outer layer is provided with a plurality of first heat transfer rings, the first heat transfer rings extend to the inside of the copper intermediate layer, one side, close to the graphene outer layer, of the, the second heat transfer ring extends to the outer inboard of graphite alkene, copper intermediate level outer wall is kept away from outer one side of graphite alkene is equipped with a plurality of third heat transfer ring, the third heat transfer ring extends to inside the steel inlayer, steel inlayer outer wall is close to copper intermediate level one side is equipped with a plurality of fourth heat transfer ring, fourth heat transfer ring extends to inside the copper intermediate level, the sleeve inner wall is equipped with the first spacing ring of a plurality of, first spacing ring inner wall is equipped with a plurality of second spacing ring, first spacing ring with the second spacing ring all extends to inside the heat reflection stratum.
In a preferred embodiment, the bottom of the oil pipe extends to the lower part of the sleeve pipe, an oil inlet is arranged below the sleeve pipe, and the top of the oil pipe extends to the upper part of the sleeve pipe, and an oil outlet is arranged.
In a preferred embodiment, the spacing between two adjacent groups of electromagnetic heaters is equal.
In a preferred embodiment, the first heat transfer ring and the graphene outer layer are made of the same material, the fourth heat transfer ring and the steel inner layer are made of the same material, and the second heat transfer ring and the third heat transfer ring and the copper intermediate layer are made of the same material.
In a preferred embodiment, the first heat transfer ring is disposed to be staggered with respect to the second heat transfer ring, the second heat transfer ring is disposed to be staggered with respect to the third heat transfer ring, the third heat transfer ring is disposed to be staggered with respect to the fourth heat transfer ring, and the fourth heat transfer ring is disposed to be staggered with respect to the first heat transfer ring.
In a preferred embodiment, the thickness of the first heat transfer ring is equal to one half of the thickness of the copper intermediate layer, the thickness of the second heat transfer ring is equal to one half of the thickness of the graphene outer layer, the thickness of the third heat transfer ring is greater than one half of the thickness of the steel inner layer, the thickness of the third heat transfer ring is less than three fifths of the thickness of the steel inner layer, and the thickness of the fourth heat transfer ring is equal to one half of the thickness of the copper intermediate layer.
In a preferred embodiment, the sum of the thicknesses of the first and second stop collars is less than one-half the thickness of the heat reflecting layer.
In a preferred embodiment, the thickness of the second position-limiting ring is greater than that of the first position-limiting ring, and the distance between two adjacent second position-limiting rings is equal to that of the first position-limiting ring.
The invention has the technical effects and advantages that:
1. according to the invention, by arranging the oil pipe, the sleeve, the electromagnetic heater and the ultrasonic generator, heat can be diffused, the uniformity of heat distribution can be enhanced, and the oil pipe is heated more uniformly;
2. according to the invention, the graphene outer layer, the steel inner layer, the copper intermediate layer and the heat reflecting layer are arranged, so that heat can be reflected, the heat is transmitted to the oil pipe, the heat loss can be effectively reduced, the graphene outer layer and the copper intermediate layer are adopted for transmission in the heat transmission process, the heat transmission efficiency is higher, and the heat can be quickly transmitted to the thick oil and the high-condensation oil;
3. according to the invention, the first heat transfer ring, the second heat transfer ring, the third heat transfer ring and the fourth heat transfer ring are arranged, so that the heat transfer effect and the connection effect of the graphene outer layer and the copper intermediate layer can be effectively enhanced by the first heat transfer ring and the second heat transfer ring, the heat transfer effect and the connection effect of the copper intermediate layer and the steel inner layer can be effectively enhanced by the third heat transfer ring and the fourth heat transfer ring, the stability is better, and the heat distribution is more uniform;
4. according to the invention, the first limiting ring and the second limiting ring are arranged, so that double limiting can be carried out on the heat reflecting layer, the connecting effect of the heat reflecting layer and the sleeve can be enhanced, the stability of the heat reflecting layer can be effectively enhanced, and the service life of the device can be prolonged.
Drawings
Fig. 1 is a front sectional view of the entirety of the present invention.
Fig. 2 is a front view of the present invention as a whole.
FIG. 3 is a front view of the tubing of the present invention.
FIG. 4 is an enlarged view of the invention at A in FIG. 1.
FIG. 5 is an enlarged view of the invention at B in FIG. 1.
Fig. 6 is a top sectional view of the present invention as a whole.
The reference signs are: the oil pipe comprises an oil pipe 1, a sleeve 2, an electromagnetic heater 3, an ultrasonic generator 4, a graphene outer layer 5, a steel inner layer 6, a copper intermediate layer 7, a heat reflection layer 8, a first heat transfer ring 9, a second heat transfer ring 10, a third heat transfer ring 11, a fourth heat transfer ring 12, a first limiting ring 13, a second limiting ring 14, an oil inlet 15 and an oil outlet 16.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more example embodiments. In the following description, numerous specific details are provided to give a thorough understanding of example embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, steps, and so forth. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The high-power oil well electromagnetic heating device based on superposition heat transfer as shown in fig. 1-6 comprises an oil pipe 1, a sleeve 2, an ultrasonic generator 4 and a plurality of groups of electromagnetic heaters 3, wherein the electromagnetic heaters 3 and the sleeve 2 are both sleeved outside the oil pipe 1, the electromagnetic heaters 3 are arranged inside the sleeve 2, the ultrasonic generator 4 is arranged at the top of the outer wall of the sleeve 2, the output end of the ultrasonic generator 4 extends to the top of the inner side of the sleeve 2, the outer wall of the oil pipe 1 is provided with an outer graphene layer 5, the inner wall of the oil pipe 1 is provided with an inner steel layer 6, a copper intermediate layer 7 is arranged between the outer graphene layer 5 and the inner steel layer 6, the inner wall of the sleeve 2 is provided with a heat reflecting layer 8, one side of the outer wall of the outer graphene layer 5, which is far away from the heat reflecting layer 8, the first heat transfer ring 9 extends into the copper intermediate layer 7, a plurality of second heat transfer rings 10 are arranged on one side, close to the outer graphene layer 5, of the outer wall of the copper intermediate layer 7, the second heat transfer rings 10 extend to the inner side of the outer graphene layer 5, a plurality of third heat transfer rings 11 are arranged on one side, far away from the outer graphene layer 5, of the outer wall of the copper intermediate layer 7, the third heat transfer rings 11 extend into the steel inner layer 6, a plurality of fourth heat transfer rings 12 are arranged on one side, close to the copper intermediate layer 7, of the outer wall of the steel inner layer 6, and the fourth heat transfer rings 12 extend into the copper intermediate layer 7;
the bottom of the oil pipe 1 extends to the lower part of the sleeve 2, an oil inlet 15 is arranged below the sleeve 2, the top of the oil pipe 1 extends to the upper part of the sleeve 2, an oil outlet 16 is arranged, oil in an oil well enters the oil pipe 1 from the oil inlet 15, and the oil is discharged out of the oil pipe 1 from the oil outlet 16;
the distances between two adjacent groups of electromagnetic heaters 3 are equal, so that the heat between the sleeve 2 and the oil pipe 1 is uniformly distributed;
the first heat transfer ring 9 and the graphene outer layer 5 are made of the same material, the fourth heat transfer ring 12 and the steel inner layer 6 are made of the same material, and the second heat transfer ring 10 and the third heat transfer ring 11 are made of the same material as the copper intermediate layer 7, so that the heat transfer efficiency among all layers is ensured;
the first heat transfer rings 9 and the second heat transfer rings 10 are arranged in a staggered mode, the second heat transfer rings 10 and the third heat transfer rings 11 are arranged in a staggered mode, the third heat transfer rings 11 and the fourth heat transfer rings 12 are arranged in a staggered mode, and the fourth heat transfer rings 12 and the first heat transfer rings 9 are arranged in a staggered mode, so that stability among all layers of the oil pipe 1 can be enhanced, and heat transfer is more uniform;
the thickness of the first heat transfer ring 9 is equal to one half of the thickness of the copper intermediate layer 7, the thickness of the second heat transfer ring 10 is equal to one half of the thickness of the graphene outer layer 5, the thickness of the third heat transfer ring 11 is larger than one half of the thickness of the steel inner layer 6, the thickness of the third heat transfer ring 11 is smaller than three fifths of the thickness of the steel inner layer 6, and the thickness of the fourth heat transfer ring 12 is equal to one half of the thickness of the copper intermediate layer 7, so that the heat transfer efficiency can be enhanced while the strength of each layer of the oil pipe 1 is ensured.
The implementation mode is specifically as follows: when the oil pipe is used, the oil pipe 1, the sleeve 2, the electromagnetic heater 3, the ultrasonic generator 4, the graphene outer layer 5, the steel inner layer 6, the copper intermediate layer 7, the heat reflection layer 8, the first heat transfer ring 9, the second heat transfer ring 10, the third heat transfer ring 11 and the fourth heat transfer ring 12 are arranged, the electromagnetic heater 3 and the ultrasonic generator 4 are started, the electromagnetic heater 3 is heated to generate heat, the heat reflection layer 8 reflects the heat to ensure that the heat is transferred to the oil pipe 1, the heat loss can be effectively reduced, the ultrasonic generator 4 generates ultrasonic waves, the ultrasonic waves perform diffusion treatment on the heat, the uniformity of heat distribution between the oil pipe 1 and the sleeve 2 can be enhanced, the oil pipe 1 is heated more uniformly, the graphene outer layer 5 can absorb and transfer the heat rapidly, the heat of the graphene outer layer 5 is transferred to the copper intermediate layer 7 rapidly and uniformly, the copper intermediate layer 7 can transfer the received heat to the steel inner layer 6 rapidly, the steel inner layer 6 is used for heating thick oil and high-condensation oil, the graphene outer layer 5 and the copper intermediate layer 7 are used for transferring in the heat transfer process, the heat transfer efficiency is higher, heat can be transferred to the thick oil and the high-condensation oil quickly, the first heat transfer ring 9 and the second heat transfer ring 10 can effectively enhance the heat transfer effect and the connection effect of the graphene outer layer 5 and the copper intermediate layer 7, the third heat transfer ring 11 and the fourth heat transfer ring 12 can effectively enhance the heat transfer effect and the connection effect of the copper intermediate layer 7 and the steel inner layer 6, the stability is better, the heat distribution is more uniform, the thick oil and the high-condensation oil are heated uniformly, and the blocking phenomenon can be avoided effectively; this embodiment has specifically solved current oil well electromagnetic heating device among the background art, and heat transfer efficiency is low, can't be fast with heat transfer to viscous crude and high viscous crude in, and heat distributes not enough evenly, leads to viscous crude and high viscous crude to be heated inequality, takes place blocking phenomenon's problem easily.
The high-power electromagnetic heating device for the oil well based on the superposition heat transfer as shown in fig. 1 and fig. 4-5 further comprises a plurality of first limiting rings 13 arranged on the inner wall of the sleeve 2, a plurality of second limiting rings 14 are arranged on the inner wall of the first limiting rings 13, and the first limiting rings 13 and the second limiting rings 14 extend into the heat reflecting layer 8;
the sum of the thicknesses of the first limiting ring 13 and the second limiting ring 14 is less than half of the thickness of the heat reflecting layer 8, so that the overall strength of the heat reflecting layer 8 is ensured;
the thickness of second spacing ring 14 is greater than the thickness of first spacing ring 13, adjacent two distance between second spacing ring 14 equals the thickness of first spacing ring 13 guarantees that first spacing ring 13 and second spacing ring 14 carry out dual spacing to heat reflection stratum 8, and the interval between a plurality of second spacing rings 14 can effectively strengthen the effect of being connected of heat reflection stratum 8 and first spacing ring 13 and second spacing ring 14 simultaneously for heat reflection stratum 8 stability is better.
The implementation mode is specifically as follows: during the use, through setting up first spacing ring 13 and second spacing ring 14, first spacing ring 13 and second spacing ring 14 can carry out dual spacing to heat reflection of layer 8, can strengthen heat reflection of layer 8 and sleeve 2's effect of being connected, can effectively strengthen heat reflection of layer 8's stability, extension fixture's life.
The working principle of the invention is as follows:
referring to the attached drawings 1-6 of the specification, by arranging the oil pipe 1, the sleeve 2, the electromagnetic heater 3, the ultrasonic generator 4, the graphene outer layer 5, the steel inner layer 6, the copper intermediate layer 7, the heat reflection layer 8, the first heat transfer ring 9, the second heat transfer ring 10, the third heat transfer ring 11 and the fourth heat transfer ring 12, heat can be reflected, heat is transmitted to the oil pipe 1, heat loss can be effectively reduced, heat can be diffused, the uniformity of heat distribution can be enhanced, the oil pipe 1 is heated more uniformly, the graphene outer layer 5 and the copper intermediate layer 7 are adopted for transmission in the heat transmission process, the heat transmission efficiency is higher, heat can be quickly transmitted to thick oil and high-condensation oil, the stability is better, and the blocking phenomenon can be effectively avoided;
further, referring to the accompanying drawings 1 and 4-5 of the specification, by arranging the first limiting ring 13 and the second limiting ring 14, the first limiting ring 13 and the second limiting ring 14 can perform double limiting on the heat reflecting layer 8, so that the connecting effect of the heat reflecting layer 8 and the sleeve 2 can be enhanced, the stability of the heat reflecting layer 8 can be effectively enhanced, and the service life of the device can be prolonged.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a high-power oil well electromagnetic heating device based on heat transfer superposes, includes oil pipe (1), sleeve (2), supersonic generator (4) and a plurality of groups electromagnetic heater (3), its characterized in that: the oil pipe is characterized in that the electromagnetic heater (3) and the sleeve (2) are all sleeved on the outer side of the oil pipe (1), the electromagnetic heater (3) is arranged on the inner side of the sleeve (2), the ultrasonic generator (4) is arranged at the top of the outer wall of the sleeve (2), the output end of the ultrasonic generator (4) extends to the top of the inner side of the sleeve (2), the outer wall of the oil pipe (1) is provided with a graphene outer layer (5), the inner wall of the oil pipe (1) is provided with a steel inner layer (6), a copper intermediate layer (7) is arranged between the graphene outer layer (5) and the steel inner layer (6), the inner wall of the sleeve (2) is provided with a heat reflecting layer (8), one side, far away from the heat reflecting layer (8), of the outer wall of the graphene outer layer (5) is provided with a plurality of first heat transfer rings (9), and the first heat transfer rings (9) extend to the inside of, a plurality of second heat transfer rings (10) are arranged on one side, close to the outer graphene layer (5), of the outer wall of the copper intermediate layer (7), the second heat transfer ring (10) extends to the inner side of the graphene outer layer (5), a plurality of third heat transfer rings (11) are arranged on one side, away from the graphene outer layer (5), of the outer wall of the copper intermediate layer (7), the third heat transfer ring (11) extends into the steel inner layer (6), a plurality of fourth heat transfer rings (12) are arranged on one side of the outer wall of the steel inner layer (6) close to the copper intermediate layer (7), the fourth heat transfer ring (12) extends inside the copper intermediate layer (7), a plurality of first limiting rings (13) are arranged on the inner wall of the sleeve (2), a plurality of second limiting rings (14) are arranged on the inner wall of the first limiting rings (13), the first limiting ring (13) and the second limiting ring (14) both extend into the heat reflecting layer (8).
2. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 1, characterized in that: the oil pipe is characterized in that the bottom of the oil pipe (1) extends to the lower portion of the sleeve (2) and is provided with an oil inlet (15), and the top of the oil pipe (1) extends to the upper portion of the sleeve (2) and is provided with an oil outlet (16).
3. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 1, characterized in that: the distances between two adjacent groups of electromagnetic heaters (3) are equal.
4. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 1, characterized in that: the first heat transfer ring (9) is made of the same material as the graphene outer layer (5), and the fourth heat transfer ring (12) is made of the same material as the steel inner layer (6).
5. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 4, characterized in that: the second heat transfer ring (10) and the third heat transfer ring (11) are made of the same material as the copper intermediate layer (7).
6. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 1, characterized in that: the first heat transfer rings (9) and the second heat transfer rings (10) are arranged in a staggered mode, and the second heat transfer rings (10) and the third heat transfer rings (11) are arranged in a staggered mode.
7. The high-power oil well electromagnetic heating device based on the superposition heat transfer as claimed in claim 6, characterized in that: the third heat transfer rings (11) and the fourth heat transfer rings (12) are arranged in a staggered mode, and the fourth heat transfer rings (12) and the first heat transfer rings (9) are arranged in a staggered mode.
8. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 1, characterized in that: the thickness of the first heat transfer ring (9) is equal to one half of the thickness of the copper intermediate layer (7), the thickness of the second heat transfer ring (10) is equal to one half of the thickness of the graphene outer layer (5), the thickness of the third heat transfer ring (11) is larger than one half of the thickness of the steel inner layer (6), the thickness of the third heat transfer ring (11) is smaller than three fifths of the thickness of the steel inner layer (6), and the thickness of the fourth heat transfer ring (12) is equal to one half of the thickness of the copper intermediate layer (7).
9. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 1, characterized in that: the sum of the thicknesses of the first limit ring (13) and the second limit ring (14) is less than half of the thickness of the heat reflecting layer (8).
10. The high-power oil well electromagnetic heating device based on superposition heat transfer of claim 1, characterized in that: the thickness of the second limiting rings (14) is larger than that of the first limiting rings (13), and the distance between every two adjacent second limiting rings (14) is equal to that of the first limiting rings (13).
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| CN106837193A (en) * | 2017-03-03 | 2017-06-13 | 河北华通线缆集团股份有限公司 | Frequency Induction Heating umbilical and preparation method thereof |
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| CN209978156U (en) * | 2019-03-26 | 2020-01-21 | 中金态和(武汉)石墨烯研究院有限公司 | Electric heating water pipe heating equipment |
| CN111088960A (en) * | 2019-04-16 | 2020-05-01 | 唐山宏赢科技有限公司 | Quick unblocking device for graphene |
| CN109931036A (en) * | 2019-04-18 | 2019-06-25 | 田振林 | The method that underground heat and oil gas are adopted altogether in petroleum or natural gas extraction |
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