Internal and external double-liquid-cooling heat dissipation device and method for logging instrument

Abstract

The invention belongs to the related technical field of logging, and discloses an internal and external double liquid cooling heat dissipation device and method for a logging instrument, and the heat dissipation device comprises a heat insulation bottle, a liquid cooling skeleton, a liquid cooling module, a heat storage module, a working mode switching valve and an active cooling mechanism. The liquid cooling framework, the liquid cooling module, the heat storage module and the working mode switching valve are sequentially connected and all arranged in the heat insulation bottle, a framework cooling pipeline of the liquid cooling framework, a flow channel in the liquid cooling module and a heat storage module spiral channel of the heat storage module are sequentially communicated to form a pipeline system, and the working mode switching valve is connected to the pipeline system. The active cooling mechanism is detachably connected to the pipeline system; the heat dissipation device is in an internal circulation working mode or an external circulation working mode by opening or closing the working mode switching valve; the inner circulation working mode and the outer circulation working mode correspond to the underground working state of the logging instrument and the out-of-well state after work is completed respectively. According to the invention, the heat dissipation and cooling efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to well logging, and more specifically, relates to an internal and external double liquid cooling device and method for a well logging instrument. Background Art

[0002] With the development of social industry, the demand for oil and gas resources is increasing, and the exploitation of oil and gas resources is becoming more and more in-depth. The logging instrument is a device used to explore the distribution of underground oil and gas resources. The chips and electronic circuits inside it face severe thermal failure risks. In the high-temperature environment underground, the electronic circuits inside the logging instrument are not only affected by the external high temperature, but the heat generated by the chip itself will also cause heat accumulation, forming local hot spots, causing electronic circuits and core failures; in addition, after completing the exploration mission and returning to the ground, the logging instrument may need to return to the well in a short time to continue operations, which requires rapid heat dissipation and cooling of the logging instrument. However, direct exposure of the chip to the external environment may cause thermal stress damage or moisture condensation short circuit.

[0003] In order to solve the problem of internal chips and electronic circuits of logging instruments being burned due to high temperatures and the difficulty in cooling down the logging instruments within a short period of time after the logging instruments are finished working, patent CN117119758A discloses "a logging instrument thermal management skeleton with built-in pipes". During the operation of the logging instrument, the heat of the chip is transferred to the heat storage module through the built-in high thermal conductivity copper pipe; after the work is completed, the heat inside the system is exported by conveying fluid to its internal flow channel. This method improves the thermal conductivity of the system, prolongs the maximum working time of the logging instrument, and can also significantly shorten the cooling time after the logging instrument is finished working, thereby improving the working efficiency of the logging instrument.

[0004] However, due to the limited capacity of heat conduction, there will inevitably be a large temperature difference between the chip and the heat storage module, and the sensible heat of the phase change material is not fully utilized; when the cooling fluid is introduced after the work is completed, the cooling effect is greatly affected by the initial temperature of the fluid. Due to the lack of active cooling mechanism, it is difficult to ensure the cooling speed of the system. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an internal and external dual liquid cooling device and method for a well logging instrument, which aims to solve the problem that the well logging instrument cannot quickly dissipate heat and cool down after work.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an internal and external double liquid-cooled heat dissipation device for a well logging instrument, the heat dissipation device comprising an insulating bottle, a liquid-cooling skeleton, a liquid-cooling module, a heat storage module, a working mode switching valve and an active cooling mechanism, the liquid-cooling skeleton, the liquid-cooling module, the heat storage module and the working mode switching valve are sequentially connected and are all arranged in the insulating bottle, the skeleton cooling pipeline of the liquid-cooling skeleton, the flow channel in the liquid-cooling module, and the heat storage module spiral channel of the heat storage module are sequentially connected to form a pipeline system, the working mode switching valve is connected to the pipeline system, and the active cooling mechanism is detachably connected to the pipeline system;

[0007] The heat dissipation device is placed in an internal circulation working mode or an external circulation working mode by opening or closing the working mode switching valve; the internal circulation working mode and the external circulation working mode respectively correspond to the downhole working state of the logging instrument and the out-of-hole state after the work is completed; when the heat dissipation device is in the internal circulation working mode, the active cooling mechanism is disconnected from the pipeline system; when the heat dissipation device is in the external circulation working mode, the active cooling mechanism is connected to the pipeline system.

[0008] Furthermore, the insulating bottle is provided with a receiving cavity, and the receiving cavity runs through one end of the insulating bottle, so that the insulating bottle forms a closed end and an open end; the receiving cavity is used to accommodate the liquid cooling skeleton, the liquid cooling module, the heat storage module and the working mode switching valve; a vacuum layer is formed in the wall of the receiving cavity; the first insulating plug and the second insulating plug are respectively provided at the opposite ends of the receiving cavity, and the first insulating plug and the second insulating plug are respectively located at the closed end and the open end; the first insulating plug and the second insulating plug are respectively connected to the liquid cooling skeleton and the heat storage module, and the working mode switching valve is arranged in the second insulating plug.

[0009] Furthermore, an S-shaped skeleton cooling pipe is formed inside the liquid-cooling skeleton; the liquid-cooling skeleton is provided with a first groove and a second groove, and two chips of the logging instrument are respectively arranged in the first groove and the second groove, and the two chips are respectively bonded to the bottom surface of the first groove and the bottom surface of the second groove through thermal interface materials.

[0010] Furthermore, the liquid cooling skeleton is provided with a first receiving groove and a second receiving groove at two opposite ends thereof, and one end of the first heat insulation plug is arranged in the first receiving groove; the liquid cooling skeleton comprises a liquid cooling skeleton upper skeleton and a liquid cooling skeleton lower skeleton connected to each other, and the first receiving groove and the second receiving groove are both formed by the liquid cooling skeleton upper skeleton and the liquid cooling skeleton lower skeleton; the first groove and the second groove are respectively provided on the liquid cooling skeleton upper skeleton and the liquid cooling skeleton lower skeleton.

[0011] Furthermore, the liquid cooling skeleton is sealedly connected to the liquid cooling module via a sealing joint; a sealing joint O-shaped groove is provided on the outer peripheral surface of the sealing joint, and a sealing ring is arranged in the sealing joint O-shaped groove to achieve sealing.

[0012] Furthermore, the heat storage module comprises a plurality of sealing joints, a heat storage module shell, a heat storage module spiral pipe and a heat storage module plug, the plurality of sealing joints are respectively arranged at two opposite ends of the heat storage module shell, and the heat storage module is connected to the liquid cooling module and the active cooling mechanism through the plurality of sealing joints; the heat storage module spiral pipe is arranged in the heat storage module shell, and is communicated with the sealing joint; the heat storage module plug is arranged at one end of the heat storage module shell adjacent to the liquid cooling module.

[0013] Furthermore, the heat storage module shell is columnar, comprising an upper end cover of the heat storage module, a heat storage module shell and a lower end cover of the heat storage module, wherein the upper end cover of the heat storage module and the lower end cover of the heat storage module are respectively arranged at two ends of the heat storage module shell; a third receiving groove is formed in the heat storage module shell, and the third receiving groove penetrates the heat storage module shell and is used to receive the spiral pipe of the heat storage module; the third receiving groove is filled with phase change material.

[0014] Furthermore, the liquid cooling module includes an adapter, a liquid compensator and a high-temperature resistant circulating pump. The adapter is provided with a first flow channel and a second flow channel. One end of the first flow channel and the second flow channel are respectively connected to the two ends of the skeleton cooling pipe through a sealing joint, and the other end is connected to the spiral pipe of the heat storage module through a sealing joint; the high-temperature resistant circulating pump is arranged on the first flow channel, and the liquid compensator is arranged on the second flow channel.

[0015] Furthermore, the active cooling mechanism is connected to the heat storage module via an external circulation rapid structure, and the working mode switching module is connected to the spiral pipe of the heat storage module.

[0016] The present invention also provides an internal and external dual liquid cooling heat dissipation method for a well logging instrument. The heat dissipation method uses the internal and external dual liquid cooling heat dissipation device for the well logging instrument as described above to dissipate heat and cool the well logging instrument. When the well logging instrument is operating underground, the heat dissipation device uses an internal circulation working mode to dissipate heat; when the underground operation is completed and the instrument returns to the outside of the well, the heat dissipation device uses an external circulation working mode to dissipate heat.

[0017] In general, compared with the prior art, the above technical solution conceived by the present invention, the internal and external dual liquid cooling heat dissipation device and method for a well logging tool provided by the present invention mainly have the following beneficial effects:

[0018] 1. The active cooling mechanism is detachably connected to the pipeline system, and the heat dissipation device is placed in an internal circulation working mode or an external circulation working mode by opening or closing the working mode switching valve; the internal circulation working mode and the external circulation working mode respectively correspond to the downhole working state of the logging instrument and the out-of-hole state after the work is completed; when the heat dissipation device is in the internal circulation working mode, the active cooling mechanism is disconnected from the pipeline system; when the heat dissipation device is in the external circulation working mode, the active cooling mechanism is connected to the pipeline system, and the active cooling mechanism participates in the work to achieve rapid cooling of the logging instrument.

[0019] 2. After the logging instrument returns to the ground after work, close the working mode switching valve, use the quick connector to connect the active cooling mechanism, and switch the working mode of the pipeline system to external circulation. After the internal high-temperature circulating medium enters the active cooling mechanism, the circulating medium is quickly cooled by the refrigeration effect of the active cooling mechanism, and then driven by the active cooling mechanism to re-enter the pipeline system to complete the external circulation. The heat inside the pipeline system is quickly exported by the low-temperature medium, which protects the chip and realizes the rapid heat dissipation of the pipeline system, so that the logging instrument can return to the well for secondary operation in a short time, improving work efficiency.

[0020] 3. In the initial stage, the high-temperature circulation pump does not work, and the heat of the chip is transferred to the heat storage module for storage by relying on the heat conduction of the skeleton. When the chip is about to reach the upper temperature limit, turn on the high-temperature circulation pump to drive the cooling medium to circulate continuously inside the pipeline system, and force the heat of the chip to be transferred to the heat storage module for storage. The forced convection heat exchange process replaces the heat conduction process, which greatly improves the heat transfer capacity, reduces the thermal resistance between the chip and the heat storage module, and realizes the rapid transfer of chip heat to the heat storage module for storage, extending the maximum working time of the logging instrument and effectively solving the problem of high-temperature burning. At the same time, by remotely controlling the switch of the high-temperature circulation pump, the working time of the high-temperature circulation pump is reduced, thereby reducing the heat generation of the high-temperature circulation pump and minimizing the overall heat generation of the pipeline system.

[0021] 4. The internal circulation and external circulation working modes of the pipeline system share the skeleton cooling pipeline in the liquid cooling skeleton, the internal flow channel in the adapter and the spiral pipeline of the heat storage module, which fully utilizes the internal space of the system, reduces the processing steps of the instrument, and reduces the production cost of the instrument.

[0022] 5. The S-shaped cooling pipe inside the liquid cooling frame can maximize the heat exchange between the chip and the circulating working fluid, and quickly export the heat of the chip. If there are multiple heat sources with different powers distributed in different positions of the frame, the S-shaped cooling pipe can also keep the temperature of the multiple heat sources as consistent as possible, extending the maximum working time of the system. The spiral cooling pipe inside the heat storage module can greatly increase the contact area between the pipe wall and the phase change material, greatly enhance the heat exchange between the circulating working fluid and the phase change material, make full use of the latent heat of the phase change material, improve the temperature uniformity of the system, and extend the working time of the system.

[0023] 6. The pipes inside the pipeline system are connected with sealed joints to ensure the sealing of the pipe joints and avoid leakage causing electronic circuit short circuit and instrument failure.

[0024] 7. The external circulation inlet and outlet pipes of the pipeline system and the ends of the inlet and outlet pipes of the active cooling mechanism are equipped with external circulation quick connectors, which can realize the quick connection between pipes, reduce the difficulty of on-site operations, reduce the connection time of the device, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of an internal and external double liquid cooling heat dissipation device for a well logging instrument provided by the present invention;

[0026] Figure 2 yes Figure 1 A partial cross-sectional view of the internal and external double liquid cooling device for the well logging tool along the AA direction;

[0027] Figure 3 yes Figure 1 Schematic diagram of a liquid cooling skeleton and chip of an internal and external dual liquid cooling heat dissipation device for a well logging instrument;

[0028] Figure 4 yes Figure 1 A schematic diagram of a sealing joint of an internal and external double liquid cooling heat dissipation device for a well logging tool;

[0029] Figure 5 yes Figure 1 A schematic diagram of a heat storage module of an internal and external dual liquid cooling device for a well logging tool;

[0030] Figure 6 yes Figure 1 A schematic diagram of a heat storage module plug of an internal and external dual liquid cooling heat dissipation device for a well logging instrument;

[0031] Figure 7 yes Figure 1 A schematic diagram of an external circulation quick connector for an internal and external double liquid cooling device for a well logging tool;

[0032] Figure 8 yes Figure 1 Schematic diagram of the active cooling mechanism of the internal and external dual liquid cooling heat dissipation device for the logging tool.

[0033] In all the drawings, the same reference numerals are used to represent the same elements or structures, wherein: 1-insulation bottle, 2-first insulation plug, 3-vacuum layer, 4-skeleton cooling pipe, 5-liquid cooling skeleton, 501-liquid cooling skeleton upper skeleton, 502-liquid cooling skeleton lower skeleton, 6-liquid compensator, 7-high temperature resistant circulation pump, 8-adapter, 9-sealing joint, 901-sealing joint inner channel, 902-sealing joint O-type groove, 10-heat storage module shell, 1001-heat storage module shell, 1002-heat storage module upper end cover, 1003-heat storage module lower end cover, 1004-heat storage module plug, 1005-heat storage module plug O-type slot, 1006-external hexagonal slot, 11-phase change material, 12-heat storage module spiral pipe, 13-working mode switching valve, 14-second insulation plug, 15-external circulation water outlet pipe, 16-external circulation water inlet pipe, 17-external circulation quick connector, 1701-quick connector male connector, 1702-quick connector female connector, 18-chip, 19-thermal interface material, 20-active cooling mechanism, 2001-compressor, 2002-condenser, 2003-expansion valve, 2004-evaporator, 2005-cooling water inlet, 2006-cooling water outlet, 21-cooling mechanism water inlet pipe, 22-cooling mechanism water outlet pipe. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] See also Figure 1 and Figure 2The present invention provides an internal and external dual liquid cooling heat dissipation device for a well logging instrument, the heat dissipation device comprises an insulation bottle 1, a liquid cooling skeleton 5, a liquid cooling module, a heat storage module, a working mode switching valve 13 and an active cooling mechanism 20, the liquid cooling skeleton 5, the liquid cooling module, the heat storage module and the working mode switching valve 13 are sequentially connected and are all arranged in the insulation bottle 1, the skeleton cooling pipe 4 of the liquid cooling skeleton 5, the flow channel in the liquid cooling module, and the heat storage module spiral channel of the heat storage module are sequentially connected to form a pipeline system, the working mode switching valve 13 is connected to the pipeline system, and the active cooling mechanism 20 is detachably connected to the pipeline system. By opening or closing the working mode switching valve 13, the heat dissipation device is placed in an internal circulation working mode or an external circulation working mode; the internal circulation working mode and the external circulation working mode correspond to the downhole working state of the well logging instrument and the out-of-hole state after the work is completed, respectively. When the heat dissipation device is in the internal circulation working mode, the active cooling mechanism 20 is disconnected from the pipeline system; when the heat dissipation device is in the external circulation working mode, the active cooling mechanism 20 is connected to the pipeline system.

[0036] The insulating bottle 1 is provided with a receiving cavity, which passes through one end of the insulating bottle 1, so that the insulating bottle 1 forms a closed end and an open end. The receiving cavity is used to accommodate the liquid cooling skeleton, the liquid cooling module, the heat storage module and the working mode switching valve 13. A vacuum layer 3 is formed in the wall of the receiving cavity.

[0037] The first insulation plug 2 and the second insulation plug 14 are respectively disposed at the two opposite ends of the receiving cavity, and the first insulation plug 2 and the second insulation plug 14 are respectively located at the closed end and the open end. In this embodiment, the first insulation plug 2 is T-shaped, and the second insulation plug 14 is rectangular; the first insulation plug 2 and the second insulation plug 14 are respectively connected to the liquid cooling skeleton and the heat storage module, and the working mode switching valve 13 is disposed in the second insulation plug 14.

[0038] See also Figure 3The two opposite ends of the liquid cooling skeleton are respectively provided with a first receiving groove and a second receiving groove, and one end of the first heat insulating plug 2 is arranged in the first receiving groove. The liquid cooling skeleton comprises a liquid cooling skeleton upper skeleton 501 and a liquid cooling skeleton lower skeleton 502 connected to each other, and the first receiving groove and the second receiving groove are formed by the liquid cooling skeleton upper skeleton 501 and the liquid cooling skeleton lower skeleton 502. The opposite surfaces of the liquid cooling skeleton upper skeleton 501 and the liquid cooling skeleton lower skeleton 502 are respectively provided with a first groove and a second groove. The two chips 18 of the logging instrument are respectively arranged in the first groove and the second groove, and the two chips 18 are respectively tightly fitted with the bottom surface of the first groove and the bottom surface of the second groove through the thermal interface material 19, so as to reduce the contact thermal resistance between the chip 18 and the liquid cooling skeleton, so that the heat of the chip 18 is transferred to the liquid cooling skeleton more quickly. An S-shaped skeleton cooling pipe 4 is formed inside the liquid cooling skeleton. Specifically, the liquid-cooled upper skeleton 501 and the liquid-cooled lower skeleton 502 are respectively provided with a partial skeleton cooling pipe 4 , which are sealed and connected by welding to form the skeleton cooling pipe 4 .

[0039] The open end is also provided with a first receiving hole and a second receiving hole, and the first receiving hole and the second receiving hole both pass through the open end. The first receiving hole and the second receiving hole are respectively connected to the two ends of the skeleton cooling pipe 4. The first receiving hole and the second receiving hole are respectively provided with sealing joints 9, and the sealing joints 9 are connected to the skeleton cooling pipe 4. The liquid-cooled skeleton is sealed and connected to the liquid cooling module through the sealing joints to ensure good sealing performance.

[0040] See also Figure 4 The sealing joint is stepped, and a through sealing joint inner channel 901 is provided along its own axial direction. A sealing joint O-shaped groove is provided on the outer peripheral surface of the sealing joint, and a sealing ring is arranged in the sealing joint O-shaped groove 902 to achieve sealing, and a good sealing effect is achieved by relying on the close contact between the sealing ring and the wall surface. In this embodiment, the diameter of the sealing joint inner channel 901 is 4 mm.

[0041] See also Figure 5 and Figure 6 The heat storage module includes a plurality of sealing joints, a heat storage module shell 10, a heat storage module spiral pipe 12 and a heat storage module plug 1004. The plurality of sealing joints are respectively arranged at two opposite ends of the heat storage module shell 10. The heat storage module is connected to the liquid cooling module and the active cooling mechanism 20 through the plurality of sealing joints. The heat storage module spiral pipe 12 is arranged in the heat storage module shell 10 and is in communication with the sealing joint. The heat storage module plug 1004 is arranged at one end of the heat storage module shell 10 adjacent to the liquid cooling module.

[0042] The heat storage module shell 10 is columnar, and includes a heat storage module upper end cover 1002, a heat storage module shell 1001, and a heat storage module lower end cover 1003. The heat storage module upper end cover 1002 and the heat storage module lower end cover 1003 are respectively arranged at both ends of the heat storage module shell 1001. The heat storage module shell 1001 is formed with a third receiving groove, which runs through the heat storage module shell 1001 and is used to receive the heat storage module spiral pipe 12. The third receiving groove is filled with a phase change material 11. The third receiving groove includes a first section, a second section, and a third section connected to each other, and the diameter of the first section and the diameter of the third section are both smaller than the diameter of the second section. The heat storage module upper end cover 1002 and the heat storage module lower end cover 1003 are respectively partially arranged in the first section and the second section. The heat storage module spiral pipe 12 is arranged in the second section.

[0043] The step formed by the first section and the second section is provided with a third receiving hole and a fourth receiving hole, the third receiving hole and the fourth receiving hole are connected to the second section and pass through one end of the heat storage module shell 1001. The third receiving hole and the fourth receiving hole are respectively provided with the sealing joint. The step formed by the third section and the second section is provided with a fifth receiving hole and a sixth receiving hole, the fifth receiving hole and the sixth receiving hole are connected to the second section and pass through the other end of the heat storage module shell 1001. The fifth receiving hole and the sixth receiving hole are respectively provided with the sealing joint.

[0044] The spiral pipe 12 of the heat storage module includes a first pipe and a second pipe, and the two ends of the first pipe are respectively connected to the sealing joint set in the third receiving hole and the sealing joint set in the sixth receiving hole. The two ends of the second pipe are respectively connected to the sealing joint set in the fourth receiving hole and the sealing joint set in the fifth receiving hole. The ends of the first pipe and the second pipe away from the liquid cooling skeleton are respectively connected to one end of the external circulation water outlet pipe 15 and one end of the external circulation water inlet pipe 16 through sealing joints, and the other end of the external circulation water outlet pipe 15 and the other end of the external circulation water inlet pipe 16 are respectively connected to the external circulation quick connector 17 after passing through the second insulation plug 14. The working mode switching valve 13 connects the external circulation water outlet pipe 15 and the external circulation water inlet pipe 16.

[0045] During packaging, the heat storage module spiral pipe 12 is first placed inside the heat storage module shell 1001 and fixed by welding; then the heat storage module upper end cover 1002 and the heat storage module lower end cover 1003 are welded to the heat storage module shell 1001. Afterwards, the phase change material 11 is heated to melt the phase change material 11 into a liquid state, and the liquid phase change material 11 is poured into the shell through the through hole on the heat storage module upper end cover 1002, and after cooling, the heat storage module plug is used to seal.

[0046] The heat storage module upper end cover 1002 is provided with a through hole. The heat storage module plug is arranged in the through hole. An outer hexagonal groove is provided at one end of the heat storage module plug, and the heat storage module plug is tightened through the outer hexagonal groove. A heat storage module plug O-shaped groove 1005 is provided on the outer peripheral surface of the heat storage module plug, and a sealing ring is placed in the heat storage module plug O-shaped groove 1005, and a sealing effect is achieved through the close contact between the sealing ring and the wall surface.

[0047] The liquid cooling module includes an adapter 8, a liquid compensator 6 and a high temperature resistant circulation pump 7. The adapter 8 is provided with a first flow channel and a second flow channel. One end of the first flow channel and the second flow channel are respectively connected to the two ends of the skeleton cooling pipe 4 through a sealing joint, and the other end is respectively connected to the first pipe and the second pipe through a sealing joint. The high temperature resistant circulation pump 7 is arranged on the first flow channel, and the liquid compensator 6 is arranged on the second flow channel.

[0048] See also Figure 7 The external circulation quick connector 17 is a C-type self-locking connector, which includes a quick connector male connector 1701 and a quick connector female connector 1702. The quick connector male connector 1701 is connected to the pipeline of the active cooling mechanism 20, and the quick connector female connector 1702 is connected to the external circulation water outlet pipeline 15 and the external circulation water inlet pipeline 16.

[0049] See also Figure 8 The active cooling mechanism 20 includes a compressor 2001, a condenser 2002, an expansion valve 2003, an evaporator 2004 and a circulation pump. The evaporator 2004 is connected to a cooling water inlet 2005 and a cooling water outlet 2006 through a pipeline, and the circulation pump is connected to the cooling water outlet 2006 and the evaporator 2004. The expansion valve 2003 is connected to the evaporator 2004 and the condenser 2002, and the compressor 2001 is connected to the evaporator 2004 and the condenser 2002. The cooling water inlet 2005 and the cooling water outlet 2006 are respectively connected to the cooling mechanism water inlet pipe 21 and the cooling mechanism water outlet pipe 22.

[0050] The compressor 2001 sucks in low-temperature, low-pressure steam, and then converts the low-temperature, low-pressure steam into high-temperature, high-pressure gas through compression. The compressor 2001 is driven by a motor, and compresses the steam through a piston or rotary compressor 2001. The compressed high-temperature, high-pressure gas enters the condenser 2002 and is cooled into a high-pressure liquid. After that, the high-pressure liquid enters the evaporator 2004 through the expansion valve 2003. The expansion valve 2003 controls the flow of the high-pressure liquid so that the high-pressure liquid can evaporate quickly after entering the evaporator 2004. Due to the action of the expansion valve 2003, the pressure of the high-pressure liquid drops rapidly after entering the evaporator 2004, and the liquid begins to evaporate into low-temperature, low-pressure steam. The low-temperature, low-pressure steam achieves a cooling effect on the high-temperature circulating working fluid. The cooled circulating working fluid is driven by a circulating pump and transported back into the pipeline system through the pipeline to achieve cooling of the system.

[0051] In this embodiment, the material of the first insulation plug 2 is PEEK, which can reduce the environmental heat leakage at the end face of the insulation bottle. The shell material of the second insulation plug 14 is PEEK, and the interior is filled with nano aerogel, which can effectively prevent the heat in the environment from invading the interior of the pipeline system and reduce the environmental heat leakage at the open end of the insulation bottle. The circulating working fluid adopts high-temperature insulating heat-conducting oil, which has a temperature resistance of more than 200°C and a high thermal conductivity. At the same time, it avoids leakage and causes short circuit of the chip 18 and the electronic circuit, thereby protecting the circuit safety.

[0052] The liquid cooling skeleton, the liquid cooling module, the heat storage module and the second heat insulation plug 14 are connected by evenly distributed axial screws. The phase change material 11 is preferably paraffin, a low melting point alloy or an alloy salt. The material of the liquid cooling skeleton is preferably aluminum alloy, stainless steel and beryllium bronze, and the heat storage module shell 1001, the upper end cover 1002 of the heat storage module, the lower end cover 1003 of the heat storage module and the heat storage module plug are made of stainless steel 304. The working mode switching valve 13 is preferably made of aluminum alloy or stainless steel, and the insulation bottle is preferably made of titanium alloy or stainless steel.

[0053] The heat dissipation device further includes a controller, which is used to control the actions of the high temperature resistant circulation pump 7, the active cooling mechanism 20 and the working mode switching module.

[0054] The present invention also provides an internal and external dual liquid cooling method for a well logging instrument, wherein the heat dissipation method uses the internal and external dual liquid cooling device for the well logging instrument as described above to dissipate heat and cool the well logging instrument, wherein the downhole operation process and the out-of-hole stage are respectively divided into two stages.

[0055] When the logging instrument is operating in a high-temperature environment underground: the heat dissipation device reduces radial environmental heat leakage through the vacuum layer 3 of the insulation bottle, and reduces axial environmental heat leakage through the first insulation plug 2 and the second insulation plug 14; the chip 18 is placed on the liquid cooling skeleton, and the two are precisely fitted through the thermal interface material 19 to reduce the contact thermal resistance. In the initial stage of the operation, the heat generated by the chip 18 is transferred to the heat storage module for storage through the heat conduction process of the liquid cooling skeleton; the skeleton cooling pipe 4 inside the liquid cooling skeleton, the flow channel in the adapter 8, the high-temperature resistant circulation pump 7, the liquid compensator 6, the spiral pipe 12 of the heat storage module, The working mode switching valve 13 is connected to form a complete internal circulation pipeline system, in which the skeleton cooling pipeline 4 is arranged in an S shape, and the spiral pipeline 12 of the heat storage module is arranged in a spiral shape, both of which are used to enhance heat exchange, so that the heat of the chip 18 is more quickly transported to the phase change material 11 of the heat storage module for storage; when the chip 18 is about to reach the upper temperature limit, the high temperature resistant circulation pump 7 is turned on to drive the circulating working fluid to flow inside the pipeline system, and the heat generated by the chip 18 is forced to be transported to the heat storage module for storage. Forced convection heat exchange replaces the heat conduction of the skeleton, greatly improving the speed of heat transport from the chip 18 to the heat storage module, and realizing heat dissipation of the chip 18. In addition, by delaying the start of the high temperature resistant circulation pump 7, the working time of the high temperature resistant circulation pump 7 can be reduced, thereby reducing the heat generation of the circulation pump and extending the maximum working time of the heat dissipation device.

[0056] After the underground high-temperature environment operation is completed, the rapid heat dissipation process is as follows: turn off the high-temperature resistant circulation pump 7 and the working mode switching valve 13, use the external circulation quick connector 17 to connect the external circulation outlet pipe 15 and the cooling mechanism water inlet pipe 21, connect the external circulation water inlet pipe 16 and the cooling mechanism water outlet pipe, so that the active cooling mechanism 20 is connected to the pipeline system. At this time, the working mode of the system is switched to the external circulation mode; turn on the active cooling mechanism 20, and the high-temperature circulating working fluid inside the system, after entering the active cooling mechanism 20, the temperature drops rapidly under the refrigeration effect of the active cooling mechanism 20, and then driven by the circulation pump of the active cooling mechanism 20, re-enters the system. At this time, the working fluid shares the skeleton cooling pipe 4 in the internal circulation mode, the internal flow channel in the adapter 8, and the spiral pipe 12 of the heat storage module to achieve rapid heat dissipation of the system.

[0057] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal and external double liquid cooling device for a well logging tool, characterized in that: The heat dissipation device comprises an insulation bottle, a liquid cooling skeleton, a liquid cooling module, a heat storage module, a working mode switching valve and an active cooling mechanism, wherein the liquid cooling skeleton, the liquid cooling module, the heat storage module and the working mode switching valve are sequentially connected and are all arranged in the insulation bottle, the skeleton cooling pipeline of the liquid cooling skeleton, the flow channel in the liquid cooling module and the heat storage module spiral channel of the heat storage module are sequentially connected to form a pipeline system, the working mode switching valve is connected to the pipeline system, and the active cooling mechanism is detachably connected to the pipeline system; The heat dissipation device is placed in an internal circulation working mode or an external circulation working mode by opening or closing the working mode switching valve; the internal circulation working mode and the external circulation working mode respectively correspond to the downhole working state of the logging instrument and the out-of-hole state after the work is completed; when the heat dissipation device is in the internal circulation working mode, the active cooling mechanism is disconnected from the pipeline system; when the heat dissipation device is in the external circulation working mode, the active cooling mechanism is connected to the pipeline system.

2. The internal and external dual liquid cooling device for a well logging tool according to claim 1, characterized in that: The insulating bottle is provided with a receiving cavity, and the receiving cavity runs through one end of the insulating bottle, so that the insulating bottle forms a closed end and an open end; the receiving cavity is used to accommodate the liquid cooling skeleton, the liquid cooling module, the heat storage module and the working mode switching valve; a vacuum layer is formed in the wall of the receiving cavity; the first insulating plug and the second insulating plug are respectively provided at the opposite ends of the receiving cavity, and the first insulating plug and the second insulating plug are respectively located at the closed end and the open end; the first insulating plug and the second insulating plug are respectively connected to the liquid cooling skeleton and the heat storage module, and the working mode switching valve is arranged in the second insulating plug.

3. The internal and external dual liquid cooling device for a well logging tool according to claim 2, characterized in that: An S-shaped skeleton cooling pipe is formed inside the liquid cooling skeleton; the liquid cooling skeleton is provided with a first groove and a second groove, and two chips of the logging instrument are respectively arranged in the first groove and the second groove, and the two chips are respectively bonded to the bottom surface of the first groove and the bottom surface of the second groove through thermal interface materials.

4. The internal and external dual liquid cooling device for a well logging tool according to claim 3, characterized in that: The liquid cooling skeleton is provided with a first receiving groove and a second receiving groove at two opposite ends thereof, and one end of the first heat insulating plug is arranged in the first receiving groove; the liquid cooling skeleton comprises a liquid cooling skeleton upper skeleton and a liquid cooling skeleton lower skeleton connected to each other, and the first receiving groove and the second receiving groove are formed by the liquid cooling skeleton upper skeleton and the liquid cooling skeleton lower skeleton; the first groove and the second groove are respectively arranged in the liquid cooling skeleton upper skeleton and the liquid cooling skeleton lower skeleton.

5. The internal and external dual liquid cooling device for a well logging tool according to claim 4, characterized in that: The liquid cooling skeleton is sealed and connected to the liquid cooling module via a sealing joint; a sealing joint O-shaped groove is provided on the outer peripheral surface of the sealing joint, and a sealing ring is arranged in the sealing joint O-shaped groove to achieve sealing.

6. The internal and external dual liquid cooling device for a well logging tool according to claim 1, characterized in that: The heat storage module comprises a plurality of sealing joints, a heat storage module shell, a heat storage module spiral pipe and a heat storage module plug. The plurality of sealing joints are respectively arranged at two opposite ends of the heat storage module shell, and the heat storage module is connected with the liquid cooling module and the active cooling mechanism through the plurality of sealing joints; the heat storage module spiral pipe is arranged in the heat storage module shell and is in communication with the sealing joint; the heat storage module plug is arranged at one end of the heat storage module shell adjacent to the liquid cooling module.

7. The internal and external dual liquid cooling device for a well logging tool according to claim 6, characterized in that: The heat storage module shell is columnar, comprising an upper end cover of the heat storage module, a heat storage module shell and a lower end cover of the heat storage module, wherein the upper end cover of the heat storage module and the lower end cover of the heat storage module are respectively arranged at two ends of the heat storage module shell; a third receiving groove is formed on the heat storage module shell, and the third receiving groove penetrates the heat storage module shell and is used to receive the spiral pipe of the heat storage module; the third receiving groove is filled with phase change material.

8. The internal and external dual liquid cooling device for a well logging instrument according to claim 1, characterized in that: The liquid cooling module includes an adapter, a liquid compensator and a high-temperature resistant circulating pump. The adapter is provided with a first flow channel and a second flow channel. One end of the first flow channel and the second flow channel are respectively connected to the two ends of the skeleton cooling pipe through a sealing joint, and the other end is connected to the spiral pipe of the heat storage module through a sealing joint; the high-temperature resistant circulating pump is arranged on the first flow channel, and the liquid compensator is arranged on the second flow channel.

9. The internal and external dual liquid cooling device for a well logging tool according to claim 8, characterized in that: The active cooling mechanism is connected to the heat storage module through an external circulation fast structure, and the working mode switching module is connected to the spiral pipeline of the heat storage module.

10. A method for heat dissipation of internal and external double liquid cooling for a well logging tool, characterized in that: The heat dissipation method adopts the internal and external dual liquid cooling device for the logging instrument as described in any one of claims 1-9 to dissipate heat and cool the logging instrument. When the logging instrument is operating underground, the heat dissipation device adopts an internal circulation working mode to dissipate heat; when the logging instrument returns to the outside of the well after the underground operation is completed, the heat dissipation device adopts an external circulation working mode to dissipate heat.

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