CN111720112B - High temperature resistant logging device and manufacturing method thereof - Google Patents
High temperature resistant logging device and manufacturing method thereof Download PDFInfo
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- CN111720112B CN111720112B CN201910222408.6A CN201910222408A CN111720112B CN 111720112 B CN111720112 B CN 111720112B CN 201910222408 A CN201910222408 A CN 201910222408A CN 111720112 B CN111720112 B CN 111720112B
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Abstract
The invention provides a high-temperature-resistant logging device and a manufacturing method thereof, the high-temperature-resistant logging device comprises a logging circuit component, a heat insulation protective layer and a stabilizing layer, wherein the heat insulation protective layer is arranged on the outer side of at least part of the logging circuit component in a coating mode, the stabilizing layer is arranged on the outer side of the heat insulation protective layer in a coating mode, the heat insulation protective layer is arranged on the outer side of the logging circuit component, so that the heat of a stratum is isolated better, the logging circuit component is provided with the environment temperature capable of working normally, structures such as a vacuum flask and the like are avoided from being introduced, and the space can be saved better to adapt to a deep well and a well with a small well bore.
Description
Technical Field
The invention relates to the technical field of underground in development processes of hot dry rock, petroleum and natural gas, geothermal heat and the like, in particular to a high-temperature-resistant logging device and a manufacturing method thereof.
Background
In the process of underground energy development, the temperature of a well bore is very high, for example, more than 130 ℃ is already achieved, even 300 ℃, and the development significance is greater when the temperature is higher.
However, the temperature endurance of the electronic components, sensors, etc. of the existing wellbore measurement and logging instruments is generally 175 ℃. Therefore, such electronic components and the like cannot normally operate in a high-temperature wellbore of 175 degrees celsius or higher.
In the prior art, in order to ensure the normal operation of well logging, a circuit system is generally packaged in a structure similar to a vacuum flask, and then is installed in an instrument and is lowered into a shaft together to measure parameters of the shaft and the stratum. The structure of the thermos flask is basically a two-layer metal structure, a cavity is arranged in the middle, and then the cavity is vacuumized. The vacuum cavity can slow down high temperature outside the instrument to enter the instrument, so that the internal circuit of the instrument can be ensured to work in a relatively low-temperature environment for a period of time.
However, the thermos bottle needs a two-layer structure, and the middle part needs a vacuum layer, so that the thickness of the thermos bottle is larger. And the high temperature well is mostly a deep well and the well hole is smaller, so that the vacuum flask can not be well applied.
Therefore, designing a high temperature resistant logging device and a manufacturing method thereof which can be better applied to a high temperature well is an urgent technical problem to be solved.
Disclosure of Invention
The invention provides a high-temperature-resistant logging device and a manufacturing method thereof, aiming at part or all of the technical problems in the prior art. This high temperature resistant logging device sets up thermal-insulated protective layer through the outside at logging circuit subassembly to completely cut off the heat in stratum better, for logging circuit subassembly provides the ambient temperature of ability normal work, simultaneously, set up the stable layer in the outside of thermal-insulated protective layer, in order to prevent thermal-insulated protective layer fracture, be used for guaranteeing thermal-insulated protective layer's integrality and then guarantee thermal-insulated effect.
According to an aspect of the invention, there is provided a high temperature resistant logging device comprising:
a logging circuit assembly for logging a well-known well,
a thermally insulating protective layer disposed over at least a portion of the outside of the logging circuit assembly,
and the cladding type stabilizing layer is arranged on the outer side of the heat insulation protective layer.
In one embodiment, the thermal protective layer is a silicon aerogel, carbon aerogel or silicon dioxide aerogel layer disposed by spraying or electroplating.
In one embodiment, the stabilizing layer is a mixture layer of a metal high-temperature binder and an alumina fiber layer which are arranged in a spraying manner.
In one embodiment, further comprising:
a multi-core cable is provided which includes,
the adapter is arranged at the lower end of the multi-core cable and is electrically connected with the logging circuit assembly,
wherein the thermal insulation protective layer and the stabilizing layer are arranged outside a section of the multi-core cable which is lowered into a shaft and outside the crossover joint.
In one embodiment, the logging circuit assembly comprises:
a lateral resistivity pressure-bearing cylinder arranged at the lower end of the conversion joint, a first mounting groove arranged on the outer wall of the lateral resistivity pressure-bearing cylinder,
a connecting circuit arranged in the inner cavity of the lateral resistivity pressure bearing cylinder and used for being electrically connected with the conversion joint,
a ring electrode disposed at the first mounting groove, the ring electrode being electrically connected with the connection circuit,
and the heat insulation protective layer is arranged on the outer wall or/and the inner wall of the lateral resistivity pressure bearing cylinder.
In one embodiment, when the heat insulation protection layer is disposed on the outer wall of the lateral resistivity pressure-bearing barrel, the heat insulation protection layer is disposed on the groove wall of the first installation groove,
and/or when the heat insulation protective layer is arranged on the outer wall of the lateral resistivity pressure bearing barrel, the protective layer is arranged on the outer wall of the stabilizing layer in a coating mode, and an annular wear-resistant belt is arranged on the outer wall of the protective layer.
In one embodiment, the logging circuit assembly has:
a sound-proof body is arranged on the sound-proof body,
acoustic system parts respectively arranged at the upper end and the lower end of the sound insulator,
acoustic processing circuitry disposed at the outer end of each of said acoustic tie members and connected to the respective said acoustic tie member by a connecting cable,
a sonication circuit support cylinder disposed outside each sonication circuit,
the heat insulation protective layer is arranged on the circumferential outer wall or/and the circumferential inner wall of the sound wave processing circuit supporting cylinder.
In one embodiment, when the heat insulation protection layer is arranged on the outer wall of the sound wave processing circuit supporting cylinder, the protection layer is arranged on the outer wall of the stabilizing layer in a coating mode, and an annular wear-resistant strip is arranged on the outer wall of the protection layer.
In one embodiment, the aerogel layer of the thermal protective layer is filled with paraffin in a volume fraction of 6%.
According to another aspect of the present invention, there is provided a method of manufacturing a high temperature resistant logging device, comprising:
step one, coating a heat insulation protective layer material on a bearing body,
step two, curing and removing impurities to form a heat insulation protective layer on the bearing body,
step three, coating a stable layer material on the outer side of the heat insulation protective layer,
step four, curing and removing impurities to form a stable layer on the heat insulation protection layer,
the supporting body comprises one or more of a multi-core cable, a conversion joint capable of being electrically connected with the multi-core cable, a lateral resistivity pressure-bearing cylinder capable of being arranged at the lower end of the conversion joint and a sound wave processing circuit supporting cylinder.
In one embodiment, in the first step, the thermal insulation protective layer material comprises 350-degree metal high-temperature adhesive and aerogel in a mass ratio of 1:4 to 1:5, the aerogel can be one of silicon aerogel, carbon aerogel or silicon dioxide aerogel,
or/and in the third step, the stabilizing layer material comprises 350-DEG C metal high-temperature adhesive and alumina fiber in the mass ratio of 1: 2-1: 3.
In one embodiment, in the second step, the carrier is cured at room temperature for 40-55 hours, then the carrier is placed in a heating furnace, heated at 115-125 ℃ for 7-9 hours, taken out of the heating furnace for cooling at room temperature, then the carrier is placed in the heating furnace, heated at 195-205 ℃ for 1.8-2.2 hours, taken out of the heating furnace for cooling at room temperature,
or/and in the fourth step, firstly curing the carrier at room temperature for 20-30 hours, then placing the carrier into a heating furnace, heating at 115-125 ℃ for 2-4 hours, taking out the carrier and cooling at room temperature, then placing the carrier into the heating furnace, heating at 195-205 ℃ for 1-2 hours, taking out the carrier and cooling at room temperature.
Compared with the prior art, the invention has at least one of the following advantages that the heat insulation protective layer is arranged on the outer side of the logging circuit assembly, so that the heat of the stratum is better isolated, and the environment temperature capable of normally working is provided for the logging circuit assembly; avoid introducing structures such as thermos, the space of saving that can be better adapts to deep well and well that the well is little with better.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic diagram of a high temperature tolerant logging device according to the present invention;
FIG. 2 shows a partial schematic view of one embodiment of a high temperature tolerant logging device according to the present invention;
FIG. 3 shows a partial schematic view of another embodiment of a high temperature tolerant logging device according to the present invention;
fig. 4 is a cross-sectional view a-a from fig. 3.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
FIG. 1 shows a high temperature tolerant logging device 100 according to the present invention. As shown in fig. 1, the refractory logging apparatus 100 includes a logging circuit assembly 1, a thermal insulation protection layer 2, and a stabilizer layer (not shown). The heat insulation protective layer 2 is arranged outside at least part of the logging circuit assembly 1 in a cladding mode to play a heat insulation role. And the firm layer cladding formula sets up in thermal-insulated protective layer 2's the outside for prevent thermal-insulated protective layer 2 fracture, in order to guarantee thermal-insulated protective layer 2's firm, and then guarantee thermal-insulated effect.
Therefore, the high-temperature-resistant logging device 100 is provided with the heat insulation protective layer 2 in a cladding mode on the outer side of the logging circuit assembly 1, so that the effect of isolating the formation heat is achieved, and the environment temperature capable of working normally is provided for the logging circuit assembly 1. Meanwhile, the heat insulation protective layer 2 replaces a vacuum flask in the prior art, has smaller size and structure, and can particularly meet the use of a deep well with a smaller borehole. In addition, set up the firm layer in the outside of thermal-insulated protective layer 2 to prevent thermal-insulated protective layer 2 fracture, be used for guaranteeing thermal-insulated protective layer 2's integrality and then guarantee thermal-insulated effect.
The heat insulation protective layer 2 is a layer formed by 350-degree metal high-temperature adhesive and silicon aerogel, carbon aerogel or silicon dioxide aerogel which are arranged in a spraying or electroplating mode. The thickness of the thermal protective layer is, for example, 2 to 5 mm. For example, the 350 ℃ metal high temperature adhesive is composed of a modified polymer resin. The heat insulating and protecting layer 2 formed of a silicon aerogel, a carbon aerogel, a silicon dioxide aerogel layer or the like has a three-dimensional nano-grid structure with high permeability, and has the advantages of being capable of bearing high temperature of 1400 ℃ and low in heat conductivity. The arrangement can avoid the influence of heat in the shaft on the logging circuit assembly 1 and provide a good working environment for the logging circuit assembly 1. The method of forming the anchoring layer will be discussed in detail later.
The stabilizing layer is a mixture layer of a metal high-temperature binder and an alumina fiber layer which are arranged in a spraying mode. The method of forming the anchoring layer will be discussed in detail later.
The refractory logging device 100 also includes a multi-core cable 3 and an adapter 4. The multi-core cable 3 is used for lowering the logging circuit assembly 1 into a well bore and providing energy for the logging circuit assembly 1. Crossover connectors 4 are disposed on and connected to the multi-conductor cable 3 to electrically connect the logging circuit assembly 1. The outer side of the section of the multi-core cable 3 which is lowered into the shaft and the outer side of the conversion joint 4 are provided with a heat insulation protective layer 2 and a stabilizing layer. For example, the heat insulating protective layer 2 is formed on the outer walls of the multi-core cable 3 and the crossover joint 4 by spraying or plating. Through the arrangement, on one hand, the multi-core cable 3 and the adapter 4 are protected, the influence of high temperature on the multi-core cable and the adapter 4 is avoided, on the other hand, heat is prevented from being transmitted to the logging circuit assembly 1 through the multi-core cable 3 and the adapter 4, and normal work of the logging circuit assembly 1 is further guaranteed.
In one embodiment, as shown in FIG. 2, the logging circuit assembly 1 includes a lateral resistivity pressure bearing cartridge 11, a connection circuit 12, and a ring electrode 13. Wherein a lateral resistivity pressure bearing cylinder 11 is arranged at the lower end of the conversion connector 4 and is used for bearing a connecting circuit 12 and a ring electrode 13. A first mounting groove 111 is provided on the outer wall of the lateral resistivity pressure-bearing cylinder 11 for mounting the ring electrode 13. One or more first mounting grooves 111 may be provided on the outer wall of the lateral resistivity pressure bearing cartridge 11 according to actual conditions. A connection circuit 12 is provided in the interior cavity of the lateral resistivity pressure barrel 11, which is electrically connectable to the crossover sub 4. The ring electrode 13 is fixed at the first mounting groove 111 for direct contact with the drilling fluid in the wellbore for making measurements of parameters such as resistivity of the formation. A protective insulating layer 2 is provided on the lateral resistivity pressure bearing cartridge 11 to slow the transfer of high temperatures within the wellbore to the connecting circuitry 12 provided therein. And a stabilizing layer is arranged on the outer side of the heat insulation protective layer 2 to ensure the heat insulation efficiency of the heat insulation protective layer 2. According to actual working conditions, the heat insulation protection layer 2 can be arranged on the inner wall of the lateral resistivity pressure bearing cylinder 11. This kind of mode of setting can avoid going into the in-process under, and thermal-insulated protective layer 2 receives the scraping or produces the reaction with the drilling fluid and influence thermal-insulated effect, and this kind of mode of setting can guarantee thermal-insulated effect of thermal-insulated protective layer 2 promptly. Of course, the heat insulation protection layer 2 may be disposed on the outer wall of the lateral resistivity pressure bearing cylinder 11, and this arrangement may affect the heat insulation effect, but the process is simple. Therefore, different setting modes can be selected according to different actual working conditions. In addition, in order to increase the heat insulation effect, heat insulation protective layers 2 can be arranged on the inner wall and the outer wall of the lateral resistivity pressure bearing cylinder 11.
Especially, when the heat insulation protective layer 2 is disposed on the outer wall, the heat insulation protective layer 2 is also disposed on the groove wall of the first mounting groove 111 to ensure a good heat insulation effect and prevent heat in the shaft from being transferred inwards through the groove wall. When the thermal insulation protective layer 2 is arranged on the outer wall of the lateral resistivity pressure bearing cylinder 11, a protective layer can be arranged on the outer wall of the corresponding stabilizing layer to prevent the thermal insulation protective layer 2 and the stabilizing layer from being damaged by scratch and the like, and the specific implementation mode is the same as or similar to that in the next embodiment.
In order to ensure the heat insulation effect and prevent heat from entering, a plugging head (not shown in the figure) is arranged at the opening end of the lateral resistivity pressure bearing cylinder 11, and a heat insulation protective layer 2 and a stabilizing layer are arranged on the inner wall or/and the outer wall of the plugging head. It will be appreciated that the plug-type arrangement may be passed if it is desired to provide a connection for connecting components within the lateral resistivity pressure canister 11. Through the arrangement, the lateral resistivity pressure bearing cylinder 11 can well relieve heat transfer at the opening end, so that the heat insulation effect is achieved.
In another embodiment, as shown in FIG. 3, the logging circuit assembly has an acoustic isolator 15, an acoustic tether 16, a sonication circuit 17 and a sonication circuit support sleeve 18. Wherein, the acoustic system 16 is a sound wave transmitting transducer and a sound wave receiving transducer, which are distributed at the upper and lower ends of the sound insulator 15, and these several components are integrated together. While the outer end of the acoustic system 16 is connected with a sound wave processing circuit supporting cylinder 18, and a sound wave processing circuit 17 which can not resist high temperature is arranged in the inner cavity of each sound wave processing circuit supporting cylinder 18. The acoustic processing circuit 17 is connected to the corresponding acoustic system 16 via a connecting cable. Wherein a heat insulating protective layer 2 is provided on the sonication circuit support cylinder 18 for heat insulation. And a stabilizing layer is arranged on the outer side of the heat insulation protective layer 2 and used for ensuring the heat insulation effect of the heat insulation protective layer 2.
Similarly to the above embodiment, the heat insulating protective layer 2 may be provided on the inner wall, the outer wall, or both the inner wall and the outer wall of the sonication circuit support cylinder 18 according to the actual working conditions.
As shown in fig. 4, when the heat insulation protection layer 2 is disposed on the outer wall of the acoustic wave processing circuit supporting cylinder 18, a protection layer 5 may be further disposed on the outer side of the stabilizing layer to protect the heat insulation protection layer 2 and the stabilizing layer from being damaged by scratches and the like. For example, the protective layer 5 may be a layer surrounded by steel sheets. It is further preferable that a wear-resistant strip 6 is provided on the outer side of the protective layer 5 to increase the wear resistance of the protective layer 5, and further ensure the integrity of the heat-insulating protective layer 2 and the stabilizing layer. For example, the wear-resistant strips 6 may be strips circumferentially distributed and welded to the outer wall of the protective layer 5. The wear resistant strip 6 may be formed from a titanium-containing wear resistant strip flux cored wire, a cemented carbide electrode, or the like. In order to increase the wear-resistant effect, a plurality of wear-resistant strips 6 may be provided in the axial direction. Through the arrangement, when the logging circuit assembly 1 is put into the well, the wear-resistant belt 6 and the well wall generate friction, and the heat-insulating protective layer 2 and the stabilizing layer cannot be damaged.
Depending on the actual operating conditions, the heat-insulating protective layer 2 may consist of a plurality of layers, as shown in fig. 4. In the case of a plurality of layers of the insulating protective layer 2, the connecting seams between adjacent layers are offset, for example, the positions of the connecting seams of the first layer are circumferentially offset from the positions of the connecting seams of the second layer by 45 to 180 degrees. The arrangement mode effectively reduces the heat transfer between the joint and the outside and effectively ensures the heat insulation effect.
In order to ensure the heat insulation effect and prevent heat from entering, a plugging head (not shown) is arranged at the opening end of the sound wave processing circuit supporting cylinder 18, and a heat insulation protective layer 2 is arranged on the inner wall or/and the outer wall of the plugging head. It will be appreciated that the block-off type arrangement may be passed if it is desired to provide a connector or the like, such as a connecting cable, for connecting the crossover sub to components within the interior chamber of the sonication circuit support cylinder 18. Through the arrangement, the sound wave processing circuit supporting cylinder 18 can well relieve heat transfer at the opening end, so that the heat insulation effect is achieved.
According to the application, the aerogel layer of the thermal protection layer 2 is filled with paraffin in a volume fraction of 6%. The heat insulating effect of the heat insulating protective layer 2 can be significantly increased by this arrangement.
According to the present application, a method of making a high temperature resistant logging device is also provided. As follows.
Firstly, a 350-degree metal high-temperature adhesive and aerogel (the aerogel can be one of silicon aerogel, carbon aerogel or silicon dioxide aerogel) are selected, and the mass ratio is 1: 4-1: 5. And mechanically stirring the two materials at 15-25 ℃ to fully mix the two materials. The mixed materials are arranged on the bearing body to be supported by spraying or electroplating. It should be noted here that the carrier may be different components according to different needs, for example, one or more of the multi-core cable 3, the adapter 4 capable of being electrically connected with the multi-core cable 3, the lateral resistivity pressure bearing barrel 11 and the acoustic wave processing circuit supporting barrel 18 which can be arranged at the lower end of the adapter; depending on different considerations, it is also possible to provide the above-mentioned mixed materials at different locations of the support, for example, the inner and outer walls of the lateral resistivity pressure-bearing cartridge 11.
After the mixed material of the 350-DEG C metal high-temperature adhesive and the aerogel is coated, the mixed material is subjected to curing and impurity removal operation. Specifically, the material is first cured at room temperature for 40-55 hours, for example 48 hours, to ensure that the material is stable. Then the carrier is placed into a heating furnace and heated at 115-125 deg.C for 7-9 hours, such as at 120 deg.C for 8 hours, to ensure the material is completely cured. Then the carrier is placed into a heating furnace, heated at 195-205 deg.C for 1.8-2.2 hours, for example, at 200 deg.C for 2 hours, and taken out to cool at room temperature to remove the high thermal conductive material in the material.
According to the actual working condition, a plurality of heat insulation protective layers 2 can be arranged on the bearing body. The setting mode repeats the operations, namely after each spraying, the operations of solidification and impurity removal are carried out.
And then coating a stable layer material on the outer side of the heat insulation protective layer 2. The stabilizing layer material comprises 350-degree metal high-temperature adhesive and alumina fiber in a mass ratio of 1: 2-1: 3. And mechanically stirring the two materials at 15-25 ℃ to fully mix the two materials. The mixed materials are arranged on the outer surface of the heat insulation protective layer 2 in a spraying mode.
After the stable layer material is coated, the stable layer material also needs to be subjected to curing and impurity removal operation. Specifically, the material is first cured at room temperature for 20-30 hours, for example 25 hours, to ensure that the material is stable. Then the carrier is placed into a heating furnace and heated at 115-125 ℃ for 2-4 hours, for example, at 120 ℃ for 3 hours, to ensure the material is completely cured. Then the carrier is placed into a heating furnace, heated at 195-205 deg.C for 1-2 hours, for example, at 200 deg.C for 1 hour, and taken out to cool at room temperature to remove the high thermal conductivity substance in the material.
According to different positions of the heat insulation protective layer 2, whether a protective layer 5 is arranged on the outer side of the corresponding stable layer or not is selected. When the heat insulation protective layer 2 is arranged on the outer wall of the sound wave processing circuit supporting cylinder 18 or the lateral resistivity pressure bearing cylinder 11, the protective layer 5 and the wear-resistant belt 6 are arranged on the outer side of the stabilizing layer.
In the present application, the terms "upper" and "lower" are used with reference to the actual operating orientation of the refractory logging device 100.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A high temperature resistant logging device, comprising:
a logging circuit assembly for logging a well-known well,
a heat insulation protective layer which is arranged at the outer side of at least part of the logging circuit assembly in a coating way, wherein the heat insulation protective layer is a silicon aerogel, a carbon aerogel or a silicon dioxide aerogel layer which is arranged in a spraying or electroplating way,
a stable layer which is coated on the outer side of the heat insulation protective layer and is a mixture layer of a metal high-temperature binder and an alumina fiber layer which are arranged in a spraying mode,
wherein the logging circuit assembly comprises:
the lateral resistivity pressure bearing cylinder is arranged at the lower end of the conversion joint, and a first mounting groove is formed in the outer wall of the lateral resistivity pressure bearing cylinder;
the connecting circuit is arranged in the inner cavity of the lateral resistivity pressure bearing cylinder and is used for being electrically connected with the conversion joint; and
a ring electrode disposed at the first mounting groove, the ring electrode being electrically connected with the connection circuit,
and the heat insulation protective layer is arranged on the outer wall or/and the inner wall of the lateral resistivity pressure bearing cylinder.
2. The refractory logging device of claim 1, further comprising:
a multi-core cable is provided which includes,
the adapter is arranged at the lower end of the multi-core cable and is electrically connected with the logging circuit assembly,
wherein the thermal insulation protection layer and the stabilizing layer are arranged outside a section of the multi-core cable lowered into the wellbore and outside the crossover joint.
3. The high temperature-resistant well logging device according to claim 1 or 2, wherein when the heat insulating protective layer is provided on the outer wall of the lateral resistivity pressure-bearing barrel, the heat insulating protective layer is provided on the groove wall of the first installation groove,
and/or when the heat insulation protective layer is arranged on the outer wall of the lateral resistivity pressure bearing barrel, the protective layer is arranged on the outer wall of the stabilizing layer in a coating mode, and an annular wear-resistant belt is arranged on the outer wall of the protective layer.
4. The refractory logging device of claim 3, wherein said logging circuitry assembly comprises:
a sound-proof body is arranged on the sound-proof body,
acoustic system parts respectively arranged at the upper end and the lower end of the sound insulator,
acoustic processing circuitry disposed at the outer end of each of said acoustic tie members and connected to the respective said acoustic tie member by a connecting cable,
a sonication circuit support cylinder disposed outside each sonication circuit,
the heat insulation protective layer is arranged on the circumferential outer wall or/and the circumferential inner wall of the acoustic wave processing circuit supporting cylinder.
5. The refractory logging device of claim 4 wherein when said thermal protective layer is disposed on said outer wall of said sonication circuit support sleeve, said protective layer is disposed on said outer wall of said stabilizing layer, and an annular wear resistant band is disposed on said outer wall of said protective layer.
6. The refractory well logging device of claim 1 or 2, wherein the aerogel layer of the thermal protection layer is filled with paraffin in a volume fraction of 6%.
7. A method of manufacturing a high temperature tolerant logging device according to any one of claims 1 to 6, comprising:
step one, coating a heat insulation protective layer material on a bearing body,
step two, curing and impurity removal are carried out to form a heat insulation protective layer on the bearing body,
step three, coating a stable layer material on the outer side of the heat insulation protective layer,
step four, curing and impurity removal are carried out to form a stable layer on the heat insulation protective layer,
the supporting body comprises one or more of a multi-core cable, a conversion joint capable of being electrically connected with the multi-core cable, a lateral resistivity pressure-bearing cylinder capable of being arranged at the lower end of the conversion joint and a sound wave processing circuit supporting cylinder.
8. The method as claimed in claim 7, wherein in the first step, the thermal insulation protective layer comprises 350-degree metal high-temperature adhesive and aerogel in a mass ratio of 1:4 to 1:5, the aerogel is silicon aerogel, carbon aerogel or silicon dioxide aerogel,
or/and in the third step, the stabilizing layer material comprises 350-degree metal high-temperature adhesive and alumina fiber in the mass ratio of 1: 2-1: 3.
9. The method as claimed in claim 7 or 8, wherein in the second step, the carrier is cured at room temperature for 40-55 hours, then the carrier is placed in a heating furnace, heated at 115-125 ℃ for 7-9 hours, taken out of the heating furnace for cooling at room temperature, then the carrier is placed in the heating furnace, heated at 195-205 ℃ for 1.8-2.2 hours, taken out of the heating furnace for cooling at room temperature,
or/and in the fourth step, firstly, the carrier is solidified for 20-30 hours at room temperature, then the carrier is placed into a heating furnace, heated for 2-4 hours at the temperature of 115-.
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| SiO_2气凝胶绝热涂层隔热与耐高温性能研究;丁逸栋等;《表面技术》;20170420(第04期);全文 * |
| 耐高温高压复合保温管研究;罗光强等;《探矿工程(岩土钻掘工程)》;20180810(第08期);全文 * |
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