CN215979342U - High-temperature logging polar plate based on vacuum heat insulation technology - Google Patents
High-temperature logging polar plate based on vacuum heat insulation technology Download PDFInfo
- Publication number
- CN215979342U CN215979342U CN202120257527.8U CN202120257527U CN215979342U CN 215979342 U CN215979342 U CN 215979342U CN 202120257527 U CN202120257527 U CN 202120257527U CN 215979342 U CN215979342 U CN 215979342U
- Authority
- CN
- China
- Prior art keywords
- base
- heat
- vacuum
- polar plate
- upper cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 30
- 239000012212 insulator Substances 0.000 claims description 27
- 239000006096 absorbing agent Substances 0.000 claims description 17
- 239000000523 sample Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims 3
- 230000009286 beneficial effect Effects 0.000 abstract description 8
- 238000012546 transfer Methods 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 24
- 230000008569 process Effects 0.000 description 13
- 239000012530 fluid Substances 0.000 description 9
- 238000002310 reflectometry Methods 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000005251 gamma ray Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000005457 Black-body radiation Effects 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001739 density measurement Methods 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
- 239000011435 rock Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of geophysical logging, in particular to a high-temperature logging polar plate based on a vacuum heat insulation technology. The utility model provides a high temperature logging polar plate based on vacuum thermal insulation technique, includes base shell, base vacuum layer and base inner bag, the inside welding of base shell has the base inner bag, forms the base vacuum layer between base shell and the base inner bag, and the base comprises base shell, base inner bag and base vacuum layer. The utility model has the beneficial effects that: this high temperature logging polar plate based on vacuum thermal insulation technique can block the heat transfer between well and the polar plate inside, prevents or slows down the inside temperature rise of polar plate, improves the temperature resistance of logging polar plate, and the heat-absorbing body is inside to be phase transition constant temperature material, has the material of higher specific heat capacity promptly, and after its absorbed heat, the temperature rise is very little, makes the inside temperature of polar plate keep invariable relatively, and its inside temperature rise range is within the index of design, has guaranteed the security when using.
Description
Technical Field
The utility model relates to the technical field of geophysical logging, in particular to a high-temperature logging polar plate based on a vacuum heat insulation technology.
Background
In the field of geophysical exploration, a sensor and a circuit module are required to be embedded and installed in some polar plates so as to obtain a desired signal-to-noise ratio. In recent years, with the development trend of miniaturization and integration of instruments, a plurality of products have directly integrated more circuits inside the polar plate, directly realize more functions of receiving, conditioning, collecting and the like of signals inside the polar plate, and finally output digital signals.
At present, the logging pole plate does not have any technology and measure for blocking external heat from entering the inside of a probe, and a relatively universal method in the industry is to improve the temperature performance of the logging pole plate by screening components and sensors with good temperature resistance. By the method, the requirement of working in a short time (continuous working for 30 minutes) in an environment with 175 ℃ can be partially met. At the moment, the service life of the sensor and the electronic circuit module inside the logging pole plate is greatly shortened under the condition of the limit temperature of the sensor and the electronic circuit module, and the actual accumulated service life in the environment of 175 ℃ is between several hours and more than ten hours, so that the service life of the instrument is greatly shortened under the condition of a high-temperature well hole environment, the cost is increased, and the construction success rate is extremely low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a high-temperature logging polar plate based on a vacuum heat insulation technology.
The problems that the existing logging pole plates do not have any technology and measure for blocking external heat from entering the inside of a probe, the service life of an instrument is greatly shortened under the high-temperature well hole environment condition, the cost is increased, and the construction success rate is extremely low are solved.
The technical scheme is as follows:
the utility model provides a high temperature logging polar plate based on vacuum thermal insulation technique, includes base shell, base vacuum layer and base inner bag, the inside welding of base shell has the base inner bag, forms the base vacuum layer between base shell and the base inner bag, and the base comprises base shell, base inner bag and base vacuum layer.
On the basis of the technical scheme, the utility model can be further improved as follows.
Furthermore, an upper cover shell is arranged above the base shell, an upper cover liner is welded on the surface of the upper cover shell, an upper cover vacuum layer is formed between the upper cover shell and the upper cover liner, the upper cover is composed of the upper cover shell, the upper cover liner and the upper cover vacuum layer, and an upper cover sealing ring is arranged on the periphery of the upper cover shell.
The beneficial effect of adopting above-mentioned further scheme is that, upper cover shell is also used for bearing well bore fluid pressure, and the base shell is also used for bearing well bore fluid pressure simultaneously.
Furthermore, the front end of the base shell is provided with a transmission channel for providing an electric signal for the pole plate sensor or the circuit module, and the right side of the sensor or the circuit module is connected with a lead.
The beneficial effect of adopting above-mentioned further scheme is that can utilize the wire to establish the polar plate and external electrical connection.
Furthermore, a pressure-bearing plug is arranged on the right side of the base shell, and a pressure-bearing plug sealing ring is arranged on the periphery of the pressure-bearing plug.
The technical scheme has the advantages that the base, the upper cover and the pressure-bearing plug are assembled together, and the joint part of the base, the upper cover and the pressure-bearing plug is sealed by the upper cover sealing ring and the pressure-bearing plug sealing ring to form a sealed polar plate inner cavity.
Furthermore, a wire channel for placing a wire is formed in the base shell, a heat insulator is filled in the wire channel, and the wire penetrates through the wire channel and is connected between the sensor or the circuit module and a contact pin on the pressure-bearing plug.
The beneficial effect of adopting above-mentioned further scheme is that, can establish the electrical connection of polar plate and outside, because the heat conduction coefficient of insulator is extremely low, consequently the heat convection between pressure-bearing plug and the polar plate inner chamber can be blocked to the insulator, weakens heat-conduction by a wide margin. The inner cavity of the polar plate is surrounded by the upper cover vacuum layer and the base vacuum layer except the conducting wire channel, and the conducting wire channel is filled with the heat insulator, so that the whole polar plate is a vacuum bottle, and the external heat of the polar plate cannot enter the inner cavity of the polar plate in the form of heat conduction and heat convection through the upper cover shell, the base shell and the pressure-bearing plug.
Furthermore, a heat absorbing body is arranged inside the base inner container, the heat absorbing body is made of a phase-change constant-temperature material, and the front end of the heat absorbing body is connected with a circuit module.
The heat absorber has the advantages that materials with high specific heat capacity can be utilized, after the materials absorb heat, the temperature rise is very small, the internal temperature of the polar plate is kept relatively constant, and the heat absorber mainly aims to absorb heat generated by a sensor or a circuit module in the polar plate in the working process and transmitted to the inner cavity of the polar plate from the outside of the polar plate. The quantity of the phase-change constant-temperature materials in the heat absorber determines the capacity of limiting internal temperature rise, and the specific implementation process of the heat absorber needs to be determined through detailed calculation.
Further, a polar plate inner cavity is formed between the base inner container and the sensor or the circuit module.
Adopt the beneficial effect of above-mentioned further scheme to be, the thermal convection that has blocked outside heat entering polar plate inner chamber of polar plate through the vacuum layer, the heat-conduction way, the material of lower emissivity and high emissivity has been adopted, the thermal radiation power has been weakened to the technology, but, still, there is some heat to get into the polar plate inner chamber with heat-conducting mode through the metal at polar plate base and upper cover joint position, also there is some heat to see through the vacuum layer with the heat-radiation mode and get into inside, insulator heat through the wire passageway gets into the polar plate inner chamber with heat-conducting and heat-radiating mode, in addition sensor or circuit module also can self heat production, therefore, in order to restrict the temperature rise range in certain target with polar plate inner chamber inside in certain time, the heat-absorbing body has been designed.
Further, still include end cap and polar plate main part, the end cap contains end cap vacuum layer, and the periphery of end cap is provided with and is used for the sealed end cap sealing washer of polar plate main part.
The beneficial effect who adopts above-mentioned further scheme is that above-mentioned vacuum layer all adopts vacuum technique to bleed, forms the vacuum, and the interior both sides surface of vacuum layer adopts the material of low emissivity and high reflectivity respectively to prevent that outside heat from getting into the polar plate inner chamber with the mode of heat radiation.
Further, the surface of the polar plate main body is provided with an electrode array, the surface of the electrode array is provided with an electrode array sealing ring, and the polar plate main body comprises a polar plate main body vacuum layer.
The beneficial effect of adopting above-mentioned further scheme is that, be equipped with the line hole at the one end of polar plate main part, the wire passes through this hole and establishes electrical connection between pressure-bearing plug and the electrode array.
The heat absorber is connected with the heat absorber, the surface of the heat absorber is connected with a long source distance detector and a circuit, and the long source distance detector and the circuit are connected with a pressure-bearing plug sealing ring; and a vacuum flask is arranged on the outer sides of the bearing socket, the heat insulator, the long-source-distance detector, the circuit and the bearing plug sealing ring, and a probe shell is connected to the outer side of the vacuum flask.
The heat insulator is made of a material with low heat conduction coefficient; the vacuum flask is independent from the shell, the inner wall and the outer wall of the vacuum flask are thinner, the occupied space is small, and the vacuum flask does not need to bear the pressure of external well fluid.
The utility model has the beneficial effects that:
1) the device can block the heat transfer between well and the polar plate inside when using, prevents or slows down the inside temperature rise of polar plate, improves the temperature resistance of logging polar plate, has promoted the result of use of device.
2) The phase-change constant-temperature material, namely the material with higher specific heat capacity, is arranged in the heat absorbing body, after the heat absorbing body absorbs heat, the temperature rise is very small, the internal temperature of the polar plate is kept relatively constant, the internal temperature rise range is within the designed index, and the safety in use is ensured.
Drawings
FIG. 1 is a schematic view of a high temperature logging electrode plate assembly of the present invention;
FIG. 2 is a schematic view of the plate assembly of the present invention;
FIG. 3 is a schematic view of the structure of FIG. 2 at A according to the present invention;
FIG. 4 is a schematic view of the structure at B in FIG. 2 according to the present invention
FIG. 5 is a schematic representation of a high temperature electrophotographic plate of the present invention;
FIG. 6 is a schematic view of the connection structure of the plate body and the motor array of the present invention;
fig. 7 is a cross-sectional view of a high temperature density plate of the present invention.
In the figure:
1. the device comprises a base shell, 2, an upper cover shell, 3, a pressure-bearing plug, 4, an upper cover sealing ring, 5, a pressure-bearing plug sealing ring, 6, an upper cover vacuum layer, 7, a base vacuum layer, 8, a sensor or circuit module, 9, a lead, 10, a base inner container, 11, an upper cover inner container, 12, a first heat insulator, 13, a lead channel, 14, a heat absorber, 15, a polar plate inner cavity, 16, a plug, 17, a plug sealing ring, 18, a polar plate main body, 19, an electrode array sealing ring, 20, an electrode array, 21, a plug vacuum layer, 22, a polar plate main body vacuum layer, 23, a circuit module, 24, a second heat insulator, 25, a vacuum flask, 26, a long-source-distance detector and circuit, 27 and a probe shell.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
In the field of geophysical exploration, a sensor and a circuit module are required to be embedded and installed in some polar plates so as to obtain a desired signal-to-noise ratio. In recent years, with the development trend of miniaturization and integration of instruments, a plurality of products have directly integrated more circuits inside the polar plate, directly realize more functions of receiving, conditioning, collecting and the like of signals inside the polar plate, and finally output digital signals.
With the progress of geological exploration and development to a deeper layer, the temperature of the underground stratum is higher and higher, the underground temperature of an oil development well in part of Xinjiang exceeds 200 ℃, the underground temperature of a hot dry rock well in recent years even exceeds 250 ℃, and more serious challenges are provided for the temperature resistance of a geological exploration logging instrument.
At present, the logging pole plate does not have any technology and measure for blocking external heat from entering the inside of a probe, and a relatively universal method in the industry is to improve the temperature performance of the logging pole plate by screening components and sensors with good temperature resistance. By the method, the requirement of working in a short time (continuous working for 30 minutes) in an environment with 175 ℃ can be partially met. At the moment, the service life of the sensor and the electronic circuit module inside the logging pole plate is greatly shortened under the condition of the limit temperature of the sensor and the electronic circuit module, and the actual accumulated service life in the environment of 175 ℃ is between several hours and more than ten hours, so that the service life of the instrument is greatly shortened under the condition of a high-temperature well hole environment, the cost is increased, and the construction success rate is extremely low.
When the instrument is used for logging underground, the temperature of the borehole fluid synchronously and rapidly rises. When the temperature in the polar plate rises rapidly, the temperature rises more than the intensity of the temperature rise which can be borne by the electronic component, so that the direct physical damage of the component, the open circuit of the pin, the disconnection of the copper foil of the circuit board and the like can be caused; when the internal temperature of the polar plate exceeds the highest rated working temperature of the circuit components, the circuit components cannot work normally and even are damaged by thermal breakdown; when the internal temperature of the polar plate does not reach the maximum rated temperature of the circuit components, but the circuit works in a high-temperature environment for a long time, the service life of the components is exponentially attenuated along with the working temperature, and the service life and the temperature resistance of the polar plate are greatly reduced.
At present, a preamplifier and a signal processing circuit thereof are directly embedded in an electric imaging logging polar plate. The gamma ray detector and the signal processing circuit are embedded in the density logging polar plate, and particularly the gamma ray detector is obviously influenced by temperature. At present, no design, product and patent for improving the temperature resistance of the logging pole plate by adopting a related heat insulation technology are found. To this utility model provides a high temperature logging polar plate based on vacuum thermal insulation technique solves above-mentioned problem.
The present invention provides the following preferred embodiments
Example one
As shown in figure 1, a high temperature logging polar plate based on vacuum thermal insulation technology, includes base shell 1, base vacuum layer 7 and base inner bag 10, and the inside welding of base shell 1 has base inner bag 10, forms base vacuum layer 7 between base shell 1 and the base inner bag 10, and the base comprises base shell 1, base inner bag 10 and base vacuum layer 7.
In this embodiment, as shown in fig. 1-2, in order to further improve the sealing effect on the base and the upper cover, an upper cover housing 2 is arranged above the base housing 1, an upper cover liner 11 is welded on the surface of the upper cover housing 2, an upper cover vacuum layer 6 is formed between the upper cover housing 2 and the upper cover liner 11, the upper cover is composed of the upper cover housing 2, the upper cover liner 11 and the upper cover vacuum layer 6, an upper cover sealing ring 4 is arranged on the periphery of the upper cover housing 2, the upper cover housing 2 is also used for bearing the fluid pressure in the wellbore, and the base housing 1 is also used for bearing the fluid pressure in the wellbore; the front end of the base shell 1 is provided with a transmission channel for providing an electric signal for a polar plate sensor or a circuit module 8, the right side of the sensor or the circuit module 8 is connected with a wire 9, the wire 9 can be utilized to establish the electrical connection between a polar plate and the outside, the right side of the base shell 1 is provided with a pressure-bearing plug 3, the periphery of the pressure-bearing plug 3 is provided with a pressure-bearing plug sealing ring 5, the base, the upper cover and the pressure-bearing plug 3 are assembled together, the combination part of the base and the upper cover is sealed through the upper cover sealing ring 4 and the pressure-bearing plug sealing ring 5, and a sealed polar plate inner cavity 15 is formed.
EXAMPLE III
As shown in figure 1, a high temperature logging polar plate based on vacuum thermal insulation technology, includes base shell 1, base vacuum layer 7 and base inner bag 10, and the inside welding of base shell 1 has base inner bag 10, forms base vacuum layer 7 between base shell 1 and the base inner bag 10, and the base comprises base shell 1, base inner bag 10 and base vacuum layer 7.
The present embodiment is different from the above embodiments in that:
in this embodiment, as shown in fig. 1 to 4, in order to further improve the effect of reducing the heat conduction, a wire channel 13 for placing the wire 9 is provided inside the base housing 1, the first heat insulator 12 is filled inside the wire channel 13, the wire 9 passes through the wire channel 13 and is connected between the sensor or circuit module 8 and the contact pin on the pressure-bearing plug 3, so as to establish an electrical connection between the pole plate and the outside, and since the heat conduction coefficient of the first heat insulator 12 is extremely low, the first heat insulator 12 can block the heat convection between the pressure-bearing plug 3 and the pole plate inner cavity 15, thereby greatly reducing the heat conduction. Thus, the inner cavity 15 of the polar plate except the lead channel 13 is completely surrounded by the upper cover vacuum layer 6 and the base vacuum layer 7, and the lead channel 13 is also filled with the first heat insulator 12, so that the whole polar plate is a vacuum bottle, the external heat of the polar plate cannot enter the inner cavity 15 of the polar plate in the form of heat conduction and heat convection through the upper cover shell 2, the base shell 1 and the pressure-bearing plug 3, and low-emissivity materials and processes are adopted on the inner walls of the base shell 1 and the upper cover shell 2, namely the surfaces of the base shell 1 and the upper cover shell 2 facing the base vacuum layer 7 and the upper cover vacuum layer 6 respectively, so that the heat radiation emissivity is reduced; the outer walls of the base inner container 10 and the upper cover inner container 11, namely the surfaces facing the vacuum layer, are made of high-reflectivity and low-transmissivity materials, so that the reflectivity of heat radiation is increased, and the heat transmissivity is reduced; the heat radiation between the base shell 1 and the base inner container 10 and between the upper cover shell 2 and the upper cover inner container 11 is prevented through the means; although the heat convection and heat conduction path of the external heat of the polar plate entering the polar plate inner cavity 15 is blocked by the vacuum layer, the material with low emissivity and high emissivity is adopted, and the heat radiation force is weakened by the process, part of the heat still enters the polar plate inner cavity 15 in a heat conduction mode through the metal at the joint part of the polar plate base and the upper cover, and part of the heat also enters the inside of the polar plate inner cavity by penetrating the vacuum layer in a heat radiation mode, the heat of the first heat insulator 12 passing through the lead channel 13 enters the polar plate inner cavity 15 in a heat conduction and heat radiation mode, and the sensor or the circuit module 8 can generate heat by itself, therefore, the heat absorber 14 is designed in order to limit the temperature rise amplitude in the polar plate inner cavity 15 within a certain time to a certain target.
Example four
As shown in figure 1, a high temperature logging polar plate based on vacuum thermal insulation technology, includes base shell 1, base vacuum layer 7 and base inner bag 10, and the inside welding of base shell 1 has base inner bag 10, forms base vacuum layer 7 between base shell 1 and the base inner bag 10, and the base comprises base shell 1, base inner bag 10 and base vacuum layer 7.
The present embodiment is different from the above embodiments in that:
in this embodiment, as shown in fig. 1 to 4, in order to further improve the temperature stabilizing effect, a heat absorbing body 14 is disposed inside the base inner container 10, the heat absorbing body 14 is made of a phase-change constant temperature material, and a circuit module 23 is connected to the front end of the heat absorbing body 14; a polar plate inner cavity 15 is formed between the base inner container 10 and the sensor or circuit module 8, materials with high specific heat capacity can be utilized, after the polar plate inner cavity absorbs heat, temperature rise is very small, the temperature inside the polar plate is kept relatively constant, and the heat absorber 14 mainly aims to absorb heat generated by the sensor or circuit module 8 in the polar plate in the working process and transmitted to the polar plate inner cavity 15 through the outside of the polar plate. The quantity of phase-change constant-temperature materials in the heat absorbing body 14 determines the capacity of limiting internal temperature rise, the specific implementation process of the patent needs to be determined through detailed calculation, the heat convection and heat conduction paths of the external heat of the polar plate entering the polar plate inner cavity 15 are blocked through the vacuum layer, materials with low emissivity and high emissivity are adopted, the heat radiation force is weakened through the process, however, part of heat still enters the polar plate inner cavity 15 through the metal at the joint part of the polar plate base and the upper cover in a heat conduction mode, part of heat also enters the interior through the vacuum layer in a heat radiation mode, the heat of the first heat insulating body 12 passing through the lead channel 13 enters the polar plate inner cavity 15 in a heat conduction and heat conduction mode, in addition, the sensor or the circuit module 8 can also generate heat by itself, therefore, in order to limit the temperature rise amplitude in a certain time inside the polar plate inner cavity 15 within a certain target, the heat absorber 14 is designed.
In this embodiment, as shown in fig. 2 to 7, in order to further improve the convenience effect during use, an electrode array 20 is disposed on the surface of the plate main body 18, an electrode array sealing ring 19 is disposed on the surface of the electrode array 20, the plate main body 18 includes a plate main body vacuum layer 22, and further includes a pressure-bearing socket, the pressure-bearing socket is provided with an electrical connection socket, the pressure-bearing socket is connected to a second heat insulator 24, the second heat insulator 24 is connected to the heat absorber 14, the surface of the heat absorber 14 is connected to a long-range detector and circuit 26, and the long-range detector and circuit 26 is connected to the pressure-bearing plug sealing ring 5; the vacuum flask 25 is arranged on the outer sides of the pressure-bearing socket, the second heat insulator 24, the long-distance detector and circuit 26 and the pressure-bearing plug sealing ring 5, the outer side of the vacuum flask 25 is connected with the probe shell 27, and the second heat insulator 24 is made of a material with low heat conduction coefficient; the vacuum flask 25 is independent from the shell, the inner wall and the outer wall of the vacuum flask are thin, the occupied space is small, and the vacuum flask does not need to bear the pressure of external well fluid.
The specific working process of the utility model is as follows:
according to the Stefan-Boltzmann law, the thermal radiation force from the ideal black body of the high-temperature polar plate to the inner cavity of the polar plate is firstly calculated, and the method comprises the following steps:
in the formula (1), EbThe thermal radiation force of a black body at a certain temperature is shown in unit: w/m2；
σbIs the radiation constant of a black body, σb＝5.67×10-8(W/m2·K4)；
T is the thermodynamic temperature of the black body in K;
cbcalled black body radiation coefficient, cb＝5.67(W/m2·K4)
According to the emissivity of the material adopted by the polar plate, the heat radiation force of the polar plate can be calculated by the formula (2):
E＝εEb-----(2)
in formula (2), E is the thermal emissivity of the actual plate, in units: w/m2；
Epsilon is the emissivity of the inner walls of the base 1 and the upper cover 2;
by the equation (3), the heat radiation power can be obtained.
P1＝E·S·ρ----(3)
In formula (3), S is the heat radiation area of the actual plate, unit: m is2；
P1Is the heat radiation power, unit: w;
rho is the reflectivity of the outer surfaces of the upper cover inner container and the base inner container.
The emissivity and reflectivity are not only related to the material, but also related to the surface condition of the material, therefore, if the inner cavity of the plate comprises radiation surfaces of different materials and processes, the thermal radiation power should be calculated respectively, and finally, the radiation power components are accumulated into the total thermal radiation power P by the formula (4)r。
Pr＝P1+P2+...+PN----(4)
2.2 Heat transfer Power calculation
In the formula (5), Pt1For heat transfer power, unit: w;
λ is the thermal conductivity of the material;
a is the cross-sectional area of the heat conductive material;
TDIFFthe temperature difference between the two ends of the heat conduction path;
l is the length of the heat conduction path.
Similarly, if there are multiple conduction paths, the total heat conduction power should be calculated and accumulated separately as:
Pt＝Pt1+Pt2+...+PtN-----(6)
then, the sum of the heat transfer power between the outside of the electrode plate and the internal space and the heating power of the circuit module inside the electrode plate is:
P＝Pr+Pt+PeP＝Pr+Pt+Pe-----(7)
in the formula (7), PeThe unit is the heating power of the circuit module: w;
p is the total thermal power.
2.3 calculate the weight of endothermic agent
Calculating the total heat quantity transmitted from the outside of the pole plate to the inside of the pole plate in the working process according to the technical indexes of the high-temperature pole plate design:
Q＝P·tdiff----(8)
in formula (8), Q is the amount of heat in J (joules);
tdiffworking time, unit: second;
p is the total heat transfer power in units: w;
the total heat that the endothermic agent can absorb in the allowable temperature range must be greater than the total heat Q introduced, then:
c·m·ΔT≥Q-----(9)
in the formula (9), Q is the total heat quantity transmitted to the inner part of the polar plate in the working time, and the unit is J (joule);
delta T is the phase change temperature difference of the heat absorbent, which is the difference between the target temperature of the heat absorbent and the temperature before working;
c is the specific heat capacity of the heat absorbent material, and the unit is as follows: j/kg;
m is the mass of the heat absorbent;
after the work-up of formula (9), the mass of the endothermic agent can be determined:
by the above calculation, m can be obtained, if the temperature T and the work T of the patent are indiffTime, internal temperature rise is no greater than Δ T, and the endothermic agent mass must be greater than m. By the vacuum heat insulation technology, the logging polar plate can work for more than 10 hours in a fluid environment with the temperature of 200 ℃ in the well, the internal temperature of the polar plate does not exceed 150 ℃, and a sensor-circuit module embedded in the polar plate can work normally.
In order to further illustrate the working principle of the utility model
As shown in fig. 5, the structure of the high temperature electrophotographic plate is schematically illustrated, in which the plate main body 18 and the plug 16 are assembled together to form the plate inner cavity 15, and the plate main body 18 and the plug 16 are sealed by the plug sealing ring 17. At one end of the plate body 18 there is provided a wiring aperture through which the conductor 9 is electrically connected to the pressure-bearing plug 3 and the electrode array 20. The wiring holes are filled with a first heat insulator 12, which blocks heat convection with the inner cavity 15 of the pole plate and weakens heat conduction. A polar plate main body vacuum layer 22 on the polar plate main body 18 and a plug vacuum layer 21 on a plug block the external heat of the polar plate from entering the polar plate inner cavity 15 in a heat conduction and heat convection mode; meanwhile, the inner surfaces of the polar plate main body vacuum layer 22 and the plug vacuum layer 21 are respectively made of materials and processes with low emissivity and high reflectivity, and heat from the outside of the polar plate is reduced to enter the polar plate inner cavity 15 through the vacuum layers in a heat radiation mode. The heat absorbing body 14 and the circuit module 23 are installed in the pole plate inner cavity 15, wherein the phase-change constant-temperature material with higher specific heat capacity is installed in the heat absorbing body 14, the heat generated in the working process of the circuit module 23 and the heat entering the pole plate through the vacuum layer and the first heat insulator 12 are absorbed, the temperature rising speed of the pole plate inner cavity 15 is slowed down, the electric imaging high-temperature pole plate can work for 10 hours in the environment with the temperature higher than 200 ℃, and the temperature rising range inside the electric imaging high-temperature pole plate is within the designed index.
The mass of the phase-change thermostatic material in the heat absorbing body 14 needs to be calculated according to the algorithm described in this patent.
As shown in fig. 6-7, the density measurement plate is a high temperature density plate, in which a pressure-bearing socket, a second heat insulator 24, a heat absorber 14, a long-source-distance detector and circuit 26, a short-source-distance detector and circuit 5 are assembled together, and are put into a vacuum flask 25, and then the whole is put into a probe shell 27. Wherein the probe casing 27 provides mechanical protection for the pole plate, bears well bore fluid pressure, and is sealed with the pressure-bearing socket by a sealing ring. The vacuum flask 25 can block the external heat of the pole plate from penetrating the vacuum layer to enter the interior of the flask through heat conduction and heat convection, and the external heat is weakened by adopting special processes and materials to enter the interior of the flask in the form of heat radiation. The second insulator 24 is used to prevent external heat from entering the cavity of the vacuum flask 25 by heat convection, the heat entering through the pressure-bearing socket can only enter by heat radiation and heat conduction, and the heat conduction coefficient of the second insulator 24 is very low, thus limiting the heat transmission. The heat absorbing body 14 is filled with a phase-change constant-temperature material, has high specific heat capacity, can absorb heat entering the vacuum flask and generated by the short-source-distance detector and circuit 5 and the long-source-distance detector and circuit 26, and has extremely small temperature rise. The measures ensure that the density pole plate works for 10 hours in the environment of more than 200 ℃, and the internal temperature rise amplitude is limited within the design index.
The above is the operation of the whole device, and the details which are not described in detail in this specification are well known to those skilled in the art.
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 utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a high temperature logging polar plate based on vacuum thermal-insulated technique, includes base shell (1), base vacuum layer (7) and base inner bag (10), its characterized in that: the base comprises a base shell (1), a base inner container (10) and a base vacuum layer (7), wherein the base inner container (10) is welded inside the base shell (1), the base vacuum layer (7) is formed between the base shell (1) and the base inner container (10), and the base is composed of the base shell (1), the base inner container (10) and the base vacuum layer (7).
2. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 1, wherein: the base is characterized in that an upper cover shell (2) is arranged above the base shell (1), an upper cover inner container (11) is welded on the surface of the upper cover shell (2), an upper cover vacuum layer (6) is formed between the upper cover shell (2) and the upper cover inner container (11), the upper cover is composed of the upper cover shell (2), the upper cover inner container (11) and the upper cover vacuum layer (6), and an upper cover sealing ring (4) is arranged on the periphery of the upper cover shell (2).
3. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 2, wherein: the front end of the base shell (1) is provided with a transmission channel for providing an electric signal for the pole plate sensor or the circuit module (8), and the right side of the sensor or the circuit module (8) is connected with a lead (9).
4. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 1, wherein: the right side of the base shell (1) is provided with a pressure-bearing plug (3), and the periphery of the pressure-bearing plug (3) is provided with a pressure-bearing plug sealing ring (5).
5. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 3, wherein: a wire channel (13) for placing a wire (9) is formed in the base shell (1), a first heat insulator (12) is filled in the wire channel (13), and the wire (9) penetrates through the wire channel (13) to be connected between the sensor or circuit module (8) and a contact pin on the pressure-bearing plug (3).
6. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 1, wherein: the heat absorption body (14) is arranged in the base inner container (10), the heat absorption body (14) is made of a phase-change constant-temperature material, and the front end of the heat absorption body (14) is connected with a circuit module (23).
7. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 6, wherein: and a polar plate inner cavity (15) is formed between the base inner container (10) and the sensor or circuit module (8).
8. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 1, wherein: the novel pole plate sealing structure is characterized by further comprising a plug (16) and a pole plate main body (18), wherein the plug (16) comprises a plug vacuum layer (21), and a plug sealing ring (17) used for sealing the pole plate main body (18) is arranged on the periphery of the plug (16).
9. The high-temperature logging pole plate based on the vacuum thermal insulation technology as claimed in claim 8, wherein: the surface of the pole plate main body (18) is provided with an electrode array (20), the surface of the electrode array (20) is provided with an electrode array sealing ring (19), and the pole plate main body (18) comprises a pole plate main body vacuum layer (22).
10. The high-temperature logging pole plate based on the vacuum heat insulation technology as claimed in claim 1, wherein: the heat absorber further comprises a pressure-bearing socket, the pressure-bearing socket is provided with an electrical connection socket, the pressure-bearing socket is connected with a second heat insulator (24), the second heat insulator (24) is connected with the heat absorber (14), the surface of the heat absorber (14) is connected with a long source distance detector and a long source distance circuit (26), and the long source distance detector and the long source distance circuit (26) are connected with a pressure-bearing plug sealing ring (5); and a vacuum flask (25) is arranged on the outer sides of the pressure-bearing socket, the second heat insulator (24), the long-source-distance detector and circuit (26) and the pressure-bearing plug sealing ring (5), and a probe shell (27) is connected to the outer side of the vacuum flask (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120257527.8U CN215979342U (en) | 2021-01-29 | 2021-01-29 | High-temperature logging polar plate based on vacuum heat insulation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120257527.8U CN215979342U (en) | 2021-01-29 | 2021-01-29 | High-temperature logging polar plate based on vacuum heat insulation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215979342U true CN215979342U (en) | 2022-03-08 |
Family
ID=80506543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120257527.8U Active CN215979342U (en) | 2021-01-29 | 2021-01-29 | High-temperature logging polar plate based on vacuum heat insulation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215979342U (en) |
-
2021
- 2021-01-29 CN CN202120257527.8U patent/CN215979342U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5931000A (en) | Cooled electrical system for use downhole | |
| CN105952440B (en) | Downhole electronics force cooling insulated hold | |
| US7440283B1 (en) | Thermal isolation devices and methods for heat sensitive downhole components | |
| US5999081A (en) | Shielding unique for filtering RFI and EFI interference signals from the measuring elements | |
| US9835736B2 (en) | Thermally-protected scintillation detector | |
| EP1945904B1 (en) | Improved vacuum insulated dewar flask | |
| CN203824685U (en) | Pressure measuring system with mineral matter insulating cable | |
| US5864282A (en) | Unique strain relief junction | |
| US4513352A (en) | Thermal protection apparatus | |
| CN211504452U (en) | Composite sensor for detecting fluid parameters in pipeline | |
| CA1194782A (en) | Borehole apparatus for thermal equalization | |
| WO2011009022A2 (en) | Method and apparatus of heat dissipaters for electronic components in downhole tools | |
| CN102879129A (en) | Heat flux density measurement device and method | |
| CN106714518A (en) | Wide-temperature heat control device | |
| NO20201125A1 (en) | Thermal barrier for downhole flasked electronics | |
| CN215979342U (en) | High-temperature logging polar plate based on vacuum heat insulation technology | |
| CN106525288A (en) | Pure radiation heat flow sensor | |
| CN113738306A (en) | Underground phase-change temperature adjusting method and device | |
| CN114810032A (en) | High-temperature logging polar plate based on vacuum heat insulation technology | |
| US4629888A (en) | Well logging tool for hot well bores | |
| WO2017177517A1 (en) | X-ray fluorescence logging probe for deep well detection | |
| CN107240455A (en) | Power cable, power cable assembly and electric automobile | |
| CN109577949A (en) | Utilize the device and method of pressure transmission medium transmitting pressure to underground electronic component | |
| US4694166A (en) | Logging device having bimetallic insulating flask | |
| US10605071B2 (en) | Encapsulated sensors and electronics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240129 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: SINOPEC Group Country or region after: China Patentee after: Sinopec Petroleum Engineering Technology Service Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: Sinopec Jingwei Co.,Ltd. Patentee after: Shengli logging company of Sinopec Jingwei Co.,Ltd. Address before: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee before: SINOPEC Group Country or region before: China Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: WELL LOGGING COMPANY, SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. |