Hot dry rock wellbore detection device

Abstract

The application discloses a dry hot rock well shaft detection device, which comprises an outer cylinder structure, a power supply assembly, a high-temperature magnetic positioning assembly, a detection probe assembly, a fluid flow rate detection assembly and a heat insulation structure; the heat insulation structure comprises a first end heat insulation part and a second end heat insulation part; the first end of the outer cylinder structure is a closed end, and the second end of the outer cylinder structure is an open end; the first end of the detection probe assembly is fixed to the second end of the outer cylinder structure and blocks the second end of the outer cylinder structure; from the direction of the first end of the outer cylinder structure to the second end of the outer cylinder structure, the first end heat insulation part, the power supply assembly, the high-temperature magnetic positioning assembly and the second end heat insulation part are sequentially arranged in the outer cylinder structure and are clamped between the closed end of the outer cylinder structure and the detection probe assembly; and the first end of the fluid flow rate detection assembly is connected to the second end of the detection probe assembly. The scheme can solve the problem that detection instruments are difficult to adapt to the high-temperature environment in a dry hot rock well shaft and are prone to damage in the related art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot dry rock wellbore detection, and particularly relates to a hot dry rock wellbore detection device. BACKGROUND

[0002] As a new emerging renewable energy, hot dry rock has great resource potential. The total amount of hot dry rock resources is huge. Effective development and utilization of hot dry rock resources can change the energy pattern, effectively guarantee energy security, greatly reduce carbon emissions, and achieve the purpose of improving the ecological environment and realizing green development.

[0003] Formation related parameter measurement is an important link in the drilling process, which can provide important data guidance for subsequent operations. This step is realized by detecting the hot dry rock wellbore. However, the temperature of the hot dry rock wellbore is high, and the well condition is complex. At present, the ordinary testing instrument is difficult to meet the high temperature environment in the well, and it is difficult to complete the long time measurement requirement. The high temperature environment in the hot dry rock wellbore is more likely to cause damage to the testing instrument and cause the detection work to fail. SUMMARY

[0004] The embodiment of the present application discloses a hot dry rock wellbore detection device to solve the problem that the detection instrument is more likely to be damaged in the high temperature environment in the hot dry rock wellbore in the related art.

[0005] In order to solve the above technical problems, the technical scheme disclosed by the embodiment of the present application is as follows:

[0006] A hot dry rock wellbore detection device, comprising an outer cylinder structure, a power supply assembly, a high-temperature magnetic positioning assembly, a detection probe assembly, a fluid flow rate detection assembly and a heat insulation structure, wherein,

[0007] The heat insulation structure comprises a first end heat insulation part and a second end heat insulation part, the first end of the outer cylinder structure is a closed end, and the second end of the outer cylinder structure is an open end;

[0008] The first end of the detection probe assembly is fixed to the second end of the outer cylinder structure and blocks the second end of the outer cylinder structure, and from the first end of the outer cylinder structure to the second end of the outer cylinder structure, the first end heat insulation part, the power supply assembly, the high-temperature magnetic positioning assembly and the second end heat insulation part are sequentially arranged in the outer cylinder structure and are clamped between the closed end of the outer cylinder structure and the detection probe assembly;

[0009] The first end of the fluid flow rate detection assembly is connected to the second end of the detection probe assembly; the power supply assembly comprises a battery pack and a circuit board, and the battery pack is electrically connected with the circuit board.

[0010] Optionally, in the dry hot rock wellbore detection device, the power assembly further comprises a chip, and the chip is arranged on the circuit board; or,

[0011] The power assembly further comprises a gamma probe, and the gamma probe is electrically connected with the circuit board.

[0012] Optionally, in the dry hot rock wellbore detection device, the outer tube structure further comprises an outer tube body, a welding head, a sealing joint and a thermal insulation lining, wherein the first end of the welding head is welded at the first port of the outer tube body, and the first end of the outer tube structure forms the closed end; the sealing joint is fixed at the second port of the outer tube body, and the thermal insulation lining is lined on the inner side of the outer tube body and the welding head.

[0013] Optionally, in the dry hot rock wellbore detection device, the second end of the welding head is a threaded end, and the dry hot rock wellbore detection device further comprises a fishing head, one end of the fishing head is threadedly connected with the second end of the welding head, and the other end of the fishing head is used for being connected with a lifting cable.

[0014] Optionally, in the dry hot rock wellbore detection device, the dry hot rock wellbore detection device further comprises a protection cone head, a first end of the protection cone head is detachably connected with the fluid flow rate detection assembly, and a second end of the protection cone head is a conical end.

[0015] Optionally, in the dry hot rock wellbore detection device, the fluid flow rate detection assembly comprises an upper turbine bracket, a turbine and a lower turbine bracket, the upper turbine bracket is fixed at a first end of the turbine, the upper turbine bracket is connected with the detection probe assembly, the lower turbine bracket is fixed at a second end of the turbine which is away from the detection probe assembly, the lower turbine bracket is provided with a fluid inlet, the upper turbine bracket is provided with a fluid outlet, the turbine is provided with a turbine cavity, the fluid inlet, the turbine cavity and the fluid outlet are sequentially connected, the turbine cavity is provided with turbine blades, the turbine blades are provided with first coils, the first coils can rotate with the turbine blades to form a flow detection current, a first end of the detection probe assembly is provided with a flow signal connector, and the flow signal connector is electrically connected with the chip.

[0016] Optionally, in the dry hot rock well shaft detection device, the detection probe assembly comprises a bracket, a temperature detection probe, a pressure sampling probe, a threaded connecting sleeve and a gasket, the gasket is arranged at the end of the bracket adjacent to the fluid flow rate detection assembly, the threaded connecting sleeve is rotatably arranged at the end of the bracket adjacent to the fluid flow rate detection assembly, the temperature detection probe and the pressure sampling probe are arranged on the bracket and exposed to the outside of the bracket, the threaded connecting sleeve is threadedly connected with the fluid flow rate detection assembly, and the gasket is clamped between the opposite ends of the fluid flow rate detection assembly and the bracket.

[0017] Optionally, in the dry hot rock well shaft detection device, the second end heat insulation part comprises a heat insulation part connecting head, a first heat absorption body and a heat insulation body connected in sequence away from the high-temperature magnetic positioning assembly, the heat insulation part connecting head is connected with the high-temperature magnetic positioning assembly, and the heat insulation body abuts against the detection probe assembly.

[0018] Optionally, in the dry hot rock well shaft detection device, the first end heat insulation part comprises a heat absorption head, a cylinder and a heat absorption plug, the heat absorption head and the heat absorption plug are connected to the two ports of the cylinder respectively, and the heat absorption head and the heat absorption plug and the cylinder form a heat insulation cavity.

[0019] Optionally, in the dry hot rock well shaft detection device, a second heat absorption body is arranged in the heat insulation cavity.

[0020] The technical scheme disclosed by the embodiment of the present application has the following technical effects:

[0021] The dry hot rock well shaft detection device disclosed by the embodiment of the present application has the following advantages: the power supply assembly and the high-temperature magnetic positioning assembly which are more susceptible to high temperature are installed in the outer cylinder structure and between the first end heat insulation part and the second end heat insulation part, so that these devices are not directly affected by the high temperature in the dry hot rock well shaft, at the same time, the heat insulation structure comprises the first end heat insulation part and the second end heat insulation part, the first end heat insulation part and the second end heat insulation part are arranged at the two ends of the outer cylinder structure respectively, so that the high temperature heat in the dry hot rock well shaft is prevented from invading into the outer cylinder structure from the two ends of the outer cylinder structure, and the adverse thermal effects of the high temperature heat in the dry hot rock well shaft detection device on the power supply assembly and the high-temperature magnetic positioning assembly are further alleviated. The dry hot rock well shaft detection device with such a structure can better adapt to the dry hot rock well shaft detection work, so as to better alleviate the damage of the high temperature heat in the dry hot rock well shaft to the dry hot rock well shaft detection device, and achieve the purpose of prolonging the service life of the dry hot rock well shaft detection device. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a part of the structure of the dry hot rock well shaft detection device disclosed by the embodiment of the present application;

[0023] Figure 2 is another part structure schematic diagram of the dry hot rock wellbore detection device disclosed by the embodiment of the present application;

[0024] Figure 3 is a structure schematic diagram of the first end heat insulation part disclosed by the embodiment of the present application;

[0025] Figure 4 is a structure schematic diagram of the second end heat insulation part disclosed by the embodiment of the present application;

[0026] Figure 5 is a structure schematic diagram of the outer cylinder structure disclosed by the embodiment of the present application;

[0027] Figure 6 is a structure schematic diagram of the power supply assembly disclosed by the embodiment of the present application;

[0028] Figure 7 is a structure schematic diagram of the high-temperature magnetic positioning assembly disclosed by the embodiment of the present application;

[0029] Figure 8 is a structure schematic diagram of the detection probe assembly disclosed by the embodiment of the present application;

[0030] Figure 9 is a structure schematic diagram of the fluid flow rate detection assembly disclosed by the embodiment of the present application.

[0031] The components in the figure are marked as follows:

[0032] 10-outer cylinder structure, 11-outer cylinder main body, 12-welding head, 13-sealing joint, 14-heat insulation lining, 20-power supply assembly, 21-battery pack, 22-circuit board, 23-chip, 24-gamma probe, 30-high-temperature magnetic positioning assembly, 31-positioning cylinder, 32-first magnetic steel group, 33-coil support, 34-second magnetic steel group, 35-second coil, 36-pressure sensor, 37-threaded plug, 40-detection probe assembly, 41-support, 42-temperature detection probe, 43-pressure sampling probe, 44-threaded connection sleeve, 45-gasket, 50-fluid flow rate detection assembly, 51-turbine upper support, 52-turbine, 53-turbine lower support, 54-first coil, 60-heat insulation structure, 61-first end heat insulation part, 611-heat absorption head, 612-cylinder body, 613-heat absorption plug, 614-heat insulation cavity, 615-second heat absorption body, 62-second end heat insulation part, 621-heat insulation part connecting head, 622-first heat absorption body, 623-heat absorption body, 70-fishing head, 80-protuberance head. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] The technical solutions disclosed in the various embodiments of the present application will be described in detail below in connection with the drawings.

[0035] Please refer to Figures 1 to 9 The dry hot rock wellbore detection device disclosed in the embodiments of the present application comprises an outer cylinder structure 10, a power supply assembly 20, a high-temperature magnetic positioning assembly 30, a detection probe assembly 40, a fluid flow rate detection assembly 50 and a heat insulation structure 60.

[0036] The outer cylinder structure 10 is one of the external components of the dry hot rock wellbore detection device. The first end of the outer cylinder structure 10 is a closed end, and the second end of the outer cylinder structure 10 is an open end.

[0037] The heat insulation structure 60 is the main heat insulation part of the dry hot rock wellbore detection device, which plays a heat insulation role. The heat insulation structure 60 is arranged inside the outer cylinder structure 10, so as to avoid the external heat from invading into the outer cylinder structure 10 after the dry hot rock wellbore detection device is lowered into the dry hot rock wellbore.

[0038] The heat insulation structure 60 comprises a first end heat insulation part 61 and a second end heat insulation part 62. The first end heat insulation part 61 and the second end heat insulation part 62 can be made of heat insulation materials, or the first end heat insulation part 61 and the second end heat insulation part 62 can be designed as heat insulation structures, so that the first end heat insulation part 61 and the second end heat insulation part 62 have heat insulation functions.

[0039] The detection probe assembly 40 is an integrated module of the detection probe of the dry hot rock wellbore detection device, which is used to realize the detection of various preset purposes of the dry hot rock wellbore detection device. The detection probe needs to be exposed during the detection process, so the detection probe assembly 40 is not arranged inside the outer cylinder structure 10. In the embodiments of the present application, the first end of the detection probe assembly 40 is fixed to the second end of the outer cylinder structure 10 and blocks the second end of the outer cylinder structure 10. In this case, the detection probe assembly 40 is connected with the second end of the outer cylinder structure 10, which not only plays a role of blocking the second end of the outer cylinder structure 10, but also realizes the installation of itself. It should be noted that after the dry hot rock wellbore detection device is lowered into the dry hot rock wellbore, the first end of the outer cylinder structure 10 is higher than the second end of the outer cylinder structure 10.

[0040] In the direction from the first end of the outer cylinder structure 10 to the second end of the outer cylinder structure 10, the first end heat insulation part 61, the power supply assembly 20, the high-temperature magnetic positioning assembly 30 and the second end heat insulation part 62 are sequentially arranged in the outer cylinder structure 10 and sandwiched between the closed end of the outer cylinder structure 10 (i.e. the first end of the outer cylinder structure 10) and the detection probe assembly 40. The first end heat insulation part 61 can prevent heat from invading into the outer cylinder structure 10 from the first end of the outer cylinder structure 10. The second end heat insulation part 62 can also prevent heat from invading into the outer cylinder structure 10 from the second end of the outer cylinder structure 10. In addition, the first end heat insulation part 61, the power supply assembly 20, the high-temperature magnetic positioning assembly 30 and the second end heat insulation part 62 do not need to be connected again and can be sandwiched between the first end of the outer cylinder structure 10 and the detection probe assembly 40, thereby avoiding the design of a connecting structure between two adjacent components, thereby facilitating the simplification of the structure of the hot dry rock wellbore detection device.

[0041] Of course, in other embodiments, connecting structures can be provided between the first end heat insulation part 61 and the first end of the outer cylinder structure 10, between the power supply assembly 20 and the first end heat insulation part 61, between the power supply assembly 20 and the high-temperature magnetic positioning assembly 30, between the high-temperature magnetic positioning assembly 30 and the second end heat insulation part 62, and between the second end heat insulation part 62 and the detection probe assembly 40, so as to realize the assembly connection therebetween.

[0042] The fluid flow rate detection assembly 50 is used to detect the flow rate of the fluid in the hot dry rock wellbore. The fluid can be high-temperature water sprayed in the hot dry rock wellbore or high-temperature steam sprayed in the hot dry rock wellbore. The first end of the fluid flow rate detection assembly 50 is connected to the second end of the detection probe assembly 40.

[0043] In the embodiment of the present application, the power supply assembly 20 includes a battery pack 21 and a circuit board 22, and the battery pack 21 is electrically connected to the circuit board 22. The circuit board 22 can provide a mounting basis for various precision chips, sensors and other electronic devices of the hot dry rock wellbore detection device.

[0044] The dry hot rock well hole detection device disclosed by the embodiment of the present application has the power supply assembly 20 and the high-temperature magnetic positioning assembly 30 which are more susceptible to high temperature installed in the outer cylinder structure 10 and located between the first end heat insulation part 61 and the second end heat insulation part 62, so that the two assemblies are prevented from being directly affected by high temperature in the dry hot rock well hole. Meanwhile, the heat insulation structure 60 includes the first end heat insulation part 61 and the second end heat insulation part 62 which are respectively arranged at the two ends of the outer cylinder structure 10, so that the high temperature in the dry hot rock well hole is prevented from invading into the outer cylinder structure 10 from the two ends of the outer cylinder structure 10, and the adverse thermal effect of the high temperature in the dry hot rock well hole on the power supply assembly 20 and the high-temperature magnetic positioning assembly 30 is further alleviated. The dry hot rock well hole detection device with the above structure can better adapt to the detection of the dry hot rock well hole, so that the damage of the high temperature in the dry hot rock well hole to the dry hot rock well hole detection device is alleviated, and the service life of the dry hot rock well hole detection device is improved.

[0045] In the embodiment of the present application, the power supply assembly 20 can further include a chip 23 arranged on the circuit board 22. The circuit board 22 not only provides a mounting base for the chip 23, but also supplies power for the chip 23. The chip 23 can be a control chip or a computing chip, etc. Alternatively, the chip 23 can be multiple, and the multiple chips 23 can include control chips, computing chips, etc., so as to perform multiple functions. For example, in the case where the chip 23 is a control chip, the control chip can be electrically connected with the battery pack 21, so as to control the power supply of the battery pack 21. For another example, in the case where the chip 23 is a computing chip, the computing chip can perform operations such as calculation and processing on the signals detected by the detection probe assembly 40.

[0046] Further, the power supply assembly 20 disclosed by the embodiment of the present application can further include a gamma probe 24 which can be electrically connected with the circuit board 22 and then supplied with power by the circuit board 22. The gamma probe 24 is used for detecting rays and does not need to be exposed, so the gamma probe 24 is integrated in the power supply assembly 20 and installed in the outer cylinder structure 10 together with the power supply assembly 20. This assembly structure can detect rays without affecting the detection, and is also conducive to the protection of the gamma probe 24.

[0047] The outer cylinder structure 10 can have various structures. For example, the outer cylinder structure 10 can further include an outer cylinder main body 11, a welded joint 12, a sealed joint 13 and a heat insulation lining 14.

[0048] The first end of the welding head 12 is welded at the first port of the outer cylinder body 11, and the first end of the outer cylinder structure 10 is formed as the closed end as described above. The sealing joint 13 is fixed at the second port of the outer cylinder body 11, and the sealing joint 13 can be a quick joint, for example, the sealing joint 13 is a threaded sleeve structure. The sealing joint 13 is used to be connected with the first end of the detection probe assembly 40, so that the first end of the detection probe assembly 40 is fixed at the second end of the outer cylinder structure 10. The heat insulation lining 14 is lined on the inner side of the outer cylinder body 11 and the welding head 12. The heat insulation lining 14 is made of heat insulation material, for example, the heat insulation lining 14 can be made of heat insulation foam, sponge and other heat insulation materials, and the specific material of the heat insulation lining 14 is not limited in the embodiment of the present application.

[0049] In this structure, the heat insulation lining 14 is lined on the inner side of the outer cylinder body 11 and the welding head 12, so that the outer cylinder structure 10 itself also has a certain heat insulation function, so that the high temperature heat in the hot dry rock wellbore can be more fully isolated, which can further alleviate the adverse thermal effects of the high temperature heat in the hot dry rock wellbore on the power supply assembly 20 and the high temperature magnetic positioning assembly 30 in the outer cylinder structure 10.

[0050] In a further technical solution, the second end of the welding head 12 can be a threaded end. The hot dry rock wellbore detection device disclosed in the embodiment of the present application can further include a fishing head 70, one end of the fishing head 70 can be connected with the second end of the welding head 12 in a threaded manner, and the other end of the fishing head 70 is used to be connected with the lifting cable, so as to realize the connection of the lifting cable with the entire hot dry rock wellbore detection device. During the process of lowering the hot dry rock wellbore detection device into the hot dry rock wellbore, the lifting cable pulls the entire hot dry rock wellbore detection device through the fishing head 70, so as to realize the lifting of the hot dry rock wellbore detection device. In this structure, the welding head 12 is not only used to cooperate with the outer cylinder body 11 to serve as a part of the outer cylinder structure 10, but also plays a role in cooperating with the fishing head 70 to fix the fishing head 70, achieving the purpose of one thing serving multiple purposes, which is conducive to simplifying the structure of the hot dry rock wellbore detection device.

[0051] The dry hot rock wellbore detection device disclosed by the embodiment of the present application can further comprise a cone head 80, a first end of the cone head 80 being detachably connected with the fluid flow rate detection assembly 50, and a second end of the cone head 80 being a tapered end, and a tip of the tapered end facing away from the fluid flow rate detection assembly 50. In this structure, the cone head 80 can serve as a leading end of the dry hot rock wellbore detection device, and the cone head 80 can protect the fluid flow rate detection assembly 50, so that the fluid flow rate detection assembly 50 is located at a rear side of the cone head 80 during the lowering of the dry hot rock wellbore detection device, and thus the fluid flow rate detection assembly 50 will not collide with protruding rocks on the wall of the dry hot rock wellbore. At the same time, the cone head 80 is beneficial to the lowering of the dry hot rock wellbore detection device during the lowering of the dry hot rock wellbore detection device, and once there is a protruding rock on the inner wall of the dry hot rock wellbore, the cone head 80 can push the rock protruding from the inner wall of the dry hot rock wellbore, so as to facilitate the overall lowering of the dry hot rock wellbore detection device.

[0052] Specifically, the tapered end can be a square tapered end or a circular tapered end. Of course, the embodiment of the present application does not limit the specific shape of the tapered end.

[0053] In the embodiment of the present application, the type of the fluid flow rate detection assembly 50 can be various, and a conventional detection liquid or gas flow rate detection device can be used, and the embodiment of the present application does not limit the specific type of the fluid flow rate detection assembly 50. The embodiment of the present application discloses a specific structure of the fluid flow rate detection assembly 50, and the fluid flow rate detection assembly 50 can comprise an upper turbine support 51, a turbine 52 and a lower turbine support 53.

[0054] The upper turbine support 51 is fixed at a first end of the turbine 52, and the upper turbine support 51 is connected with the detection probe assembly 40. The lower turbine support 53 is fixed at a second end of the turbine 52 facing away from the detection probe assembly 40. The lower turbine support 53 is provided with a fluid inlet, and the upper turbine support 51 is provided with a fluid outlet. The turbine 52 is provided with a turbine cavity, and the turbine cavity is provided with turbine blades. The fluid inlet, the turbine cavity and the fluid outlet are sequentially connected.

[0055] The turbine blades are provided with a first coil 54, and the first coil 54 can rotate with the turbine blades to form a flow detection current. A first end of the detection probe assembly 40 is provided with a flow signal connector, and the flow signal connector is electrically connected with the chip 23.

[0056] In the specific working process, the high-temperature fluid in the hot dry rock wellbore enters the fluid flow rate detection assembly 50 from the fluid inlet, and then is discharged from the fluid flow rate detection assembly 50 through the turbine cavity and the fluid outlet. When the high-temperature fluid passes through the turbine cavity, the turbine blades in the turbine cavity are driven to rotate, and the rotation of the turbine blades drives the first coil 54 to rotate, so that the flow detection current is generated. The first end of the detection probe assembly 40 can be provided with a flow signal connector which is electrically connected with the chip 23, so that the flow detection current is transmitted to the chip 23 for processing to obtain the flow rate. Specifically, the correspondence between the flow detection current and the flow rate of the high-temperature fluid can be determined by experiments or according to a preset calculation model, and the chip 23 can determine the measured flow rate of the high-temperature fluid according to the correspondence.

[0057] The fluid flow rate detection assembly 50 with the above structure can fully utilize the high-temperature fluid in the hot dry rock wellbore to drive the turbine blades in the turbine 52 to rotate, so as to drive the first coil 54 to induce the flow detection current, and finally the flow rate of the high-temperature fluid can be detected. The fluid flow rate detection assembly 50 with the above structure does not need to be specially designed with a power structure, and does not cause additional energy consumption.

[0058] In the embodiment of the present application, the detection probe assembly 40 can have various structures. In a specific structure, the detection probe assembly 40 can include a bracket 41, a temperature detection probe 42, a pressure sampling probe 43, a threaded connection sleeve 44 and a gasket 45.

[0059] The bracket 41 is the main part of the detection probe assembly 40, and can provide a mounting basis for other components of the detection probe assembly 40. The gasket 45 is arranged at the end of the bracket 41 adjacent to the fluid flow rate detection assembly 50. The threaded connection sleeve 44 is rotatably sleeved on the end of the bracket 41 adjacent to the fluid flow rate detection assembly 50. The temperature detection probe 42 and the pressure sampling probe 43 are arranged on the bracket 41 and exposed to the outside of the bracket 41. The temperature detection probe 42 is used for detecting temperature, and the pressure sampling probe 43 is used for detecting the pressure in the hot dry rock wellbore.

[0060] The threaded connection sleeve 44 is threadedly connected with the fluid flow rate detection assembly 50, and the gasket 45 is clamped between the opposite ends of the fluid flow rate detection assembly 50 and the bracket 41. In the assembly process, the operator only needs to rotate the relatively small threaded connection sleeve 44, without rotating the entire fluid flow rate detection assembly 50 and other components (such as the cone head 80), so that the installation load can be reduced. At the same time, the gasket 45 is arranged between the opposite ends of the fluid flow rate detection assembly 50 and the bracket 41, so that direct contact between the fluid flow rate detection assembly 50 and the bracket 41 can be avoided, and damage to the two can be avoided.

[0061] Further, the gasket 45 can be a common flat gasket or an elastic gasket. In the case that the gasket 45 is an elastic gasket, the elastic gasket can realize elastic cooperation between the fluid flow rate detection assembly 50 and the support 41, so as to relieve damage caused by vibration.

[0062] As described above, the first end heat insulation part 61 and the second end heat insulation part 62 disclosed by the embodiment of the application can be made of heat insulation material (for example, heat-resistant rubber) or designed as heat insulation structure. Based on this, in an alternative scheme, the first end heat insulation part 61 can include a heat absorption head 611, a cylinder body 612 and a heat absorption plug 613.

[0063] The heat absorption head 611 and the heat absorption plug 613 are respectively connected to two ports of the cylinder body 612 and surround the cylinder body 612 to form a heat insulation cavity 614. The heat insulation cavity 614 can be filled with air, inert gas or the like, so as to form a gas heat insulation structure. Such structure is simple in structure, and the cavity structure also makes the first end heat insulation part 61 lighter in weight and simpler in structure, so as to avoid that the hot dry rock shaft detection device is too heavy.

[0064] Of course, in a further alternative scheme, the heat insulation cavity 614 can be provided with a second heat absorption body 615. The second heat absorption body 615 can be made of heat absorption material, so as to absorb heat transmitted into the heat insulation cavity 614, thereby avoiding further transmission of the heat to a deeper position of the hot dry rock shaft detection device, so as to achieve a better heat insulation effect.

[0065] Alternatively, the second end heat insulation part 62 can include, in sequence in a direction away from the high-temperature magnetic positioning assembly 30, a heat insulation part connecting head 621, a first heat absorption body 622 and a heat insulation body 623. The heat insulation part connecting head 621 is connected to the high-temperature magnetic positioning assembly 30, and the heat insulation body 623 abuts against the detection probe assembly 40. The heat insulation part connecting head 621 and the heat insulation body 623 can be made of heat insulation material, and the first heat absorption body 622 is made of heat absorption material. The heat insulation part connecting head 621 and the heat insulation body 623 can play a heat insulation role, and the first heat absorption body 622 can absorb heat transmitted thereto, so as to further prevent further transmission of heat. Such structure can undoubtedly improve the heat insulation effect.

[0066] The high-temperature magnetic positioning assembly 30 involved in the embodiment of the application can be affected in strength of a magnetic field generated by itself during the process that the hot dry rock shaft detection device is lowered into the hot dry rock shaft, and the lowering depth of the hot dry rock shaft detection device is positioned through the change in the strength of the magnetic field of itself. The working principle of the high-temperature magnetic positioning assembly 30 is a known technology, and will not be described herein.

[0067] Please refer to Figure 7In a specific structure, the high-temperature magnetic positioning assembly 30 can include a positioning cylinder 31, a first magnetic steel group 32, a coil support 33, a second magnetic steel group 34, a second coil 35, and a threaded plug 37. The positioning cylinder 31 is arranged in the outer cylinder structure 10, the coil support 33 is fixed in the positioning cylinder 31, and the second coil 35 is wound on the coil support 33, so as to be arranged in the positioning cylinder 31. The positioning cylinder 31 is provided with a positioning surface arranged at a first end of the positioning cylinder 31, and the first magnetic steel group 32 is positioned between the positioning surface and the coil support 33, so as to be installed in the positioning cylinder 31. The threaded plug 37 is installed at a second end of the positioning cylinder 31 by being threadedly connected with the positioning cylinder 31. The second magnetic steel group 34 is positioned between the threaded plug 37 and the coil support 33.

[0068] In this structure, the coil support 33 not only plays a role of installing the second coil 35, but also can be matched with the positioning surface and the threaded plug 37 respectively, so as to realize positioning and installation of the first magnetic steel group 32 and the second magnetic steel group 34 respectively, thereby achieving the purpose of one thing serving two purposes. This structure does not need to design a special installation structure for the first magnetic steel group 32 and the second magnetic steel group 34 respectively, and finally can achieve the purpose of simplifying the structure of the high-temperature magnetic positioning assembly 30.

[0069] The pressure sensor 36 of the dry hot rock wellbore detection device disclosed in the embodiment of the present application can be integrated on the positioning cylinder 31, and after sampling by the pressure sampling probe 43, the signal or data corresponding to the sampling can be detected by the pressure sensor 36. Of course, the signal or data detected by the pressure sensor 36 can also be processed by the chip 23 mentioned above.

[0070] It should be noted that in the dry hot rock wellbore detection device disclosed in the embodiment of the present application, the first end heat insulation part 61, the power supply assembly 20, the high-temperature magnetic positioning assembly 30, and the second end heat insulation part 62 are sequentially arranged, and adjacent two of them can be connected in a threaded manner, and of course other manners can also be used, which are not limited by the embodiment of the present application. Similarly, the fishing head 70, the outer cylinder structure 10, the detection probe assembly 40, the fluid flow rate detection assembly 50, and the protector cone head 80 can be connected in a threaded manner, and of course other manners can also be used, which are not limited by the embodiment of the present application.

[0071] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not limiting, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A dry hot rock wellbore detection device, characterized in that, It includes an outer cylinder structure (10), a power supply assembly (20), a high-temperature magnetic positioning assembly (30), a detection probe assembly (40), a fluid flow rate detection assembly (50), and a heat insulation structure (60); among which, The heat insulation structure (60) includes a first end heat insulation part (61) and a second end heat insulation part (62). The first end of the outer cylinder structure (10) is a closed end, and the second end of the outer cylinder structure (10) is an open end. The first end of the detection probe assembly (40) is fixed to the second end of the outer cylinder structure (10) and the second end of the outer cylinder structure (10) is sealed. From the first end of the outer cylinder structure (10) to the second end of the outer cylinder structure (10), the first end heat insulation part (61), the power supply assembly (20), the high temperature magnetic positioning assembly (30) and the second end heat insulation part (62) are sequentially arranged inside the outer cylinder structure (10) and sandwiched between the closed end of the outer cylinder structure (10) and the detection probe assembly (40). The first end of the fluid velocity detection assembly (50) is connected to the second end of the detection probe assembly (40); the power supply assembly (20) includes a battery pack (21) and a circuit board (22), and the battery pack (21) is electrically connected to the circuit board (22); The first end heat insulation part (61) includes a heat absorption head (611), a cylinder (612) and a heat absorption plug (613). The heat absorption head (611) and the heat absorption plug (613) are respectively connected to the two ports of the cylinder (612) and together with the cylinder (612) form a heat insulation cavity (614). The second end heat insulation part (62) includes a heat insulation part connector (621), a first heat absorber (622) and a heat insulation body (623) connected in sequence in a direction away from the high temperature magnetic positioning assembly (30). The heat insulation part connector (621) is connected to the high temperature magnetic positioning assembly (30), and the heat insulation body (623) abuts against the detection probe assembly (40).

2. The dry hot rock wellbore detection device according to claim 1, characterized in that, The power supply assembly (20) further includes a chip (23) disposed on the circuit board (22); or, The power supply assembly (20) also includes a gamma probe (24) which is electrically connected to the circuit board (22).

3. The dry hot rock wellbore detection device according to claim 1, characterized in that, The outer cylinder structure (10) further includes an outer cylinder body (11), a welding head (12), a sealing joint (13), and a heat insulation liner (14). The first end of the welding head (12) is welded to the first port of the outer cylinder body (11), so that the first end of the outer cylinder structure (10) forms the closed end. The sealing joint (13) is fixed to the second port of the outer cylinder body (11), and the heat insulation liner (14) is lined inside the outer cylinder body (11) and the welding head (12).

4. The dry hot rock wellbore detection device according to claim 3, characterized in that, The second end of the welding head (12) is a threaded end. The dry hot rock well shaft detection device also includes a retrieval head (70). One end of the retrieval head (70) is threadedly connected to the second end of the welding head (12), and the other end of the retrieval head (70) is used to connect to the lifting cable.

5. The dry hot rock wellbore detection device according to claim 1, characterized in that, The dry hot rock wellbore detection device also includes a protective cone head (80), the first end of which is detachably connected to the fluid flow rate detection assembly (50), and the second end of which is a cone-shaped end.

6. The dry hot rock wellbore detection device according to claim 2, characterized in that, The fluid flow rate detection assembly (50) includes a turbine upper bracket (51), a turbine (52), and a turbine lower bracket (53). The turbine upper bracket (51) is fixed to the first end of the turbine (52) and is connected to the detection probe assembly (40). The turbine lower bracket (53) is fixed to the second end of the turbine (52) facing away from the detection probe assembly (40). The turbine lower bracket (53) is provided with a fluid inlet, and the turbine upper bracket (51) is provided with a fluid outlet. The turbine (52) is provided with a turbine cavity. The fluid inlet, the turbine cavity, and the fluid outlet are connected in sequence. The turbine cavity is provided with turbine blades. The turbine blades are provided with a first coil (54). The first coil (54) can rotate with the turbine blades to form a flow detection current. The first end of the detection probe assembly (40) is provided with a flow signal connector, which is electrically connected to the chip (23).

7. The dry hot rock wellbore detection device according to claim 2, characterized in that, The detection probe assembly (40) includes a bracket (41), a temperature detection probe (42), a pressure sampling probe (43), a threaded connecting sleeve (44), and a washer (45). The washer (45) is located at the end of the bracket (41) adjacent to the fluid flow rate detection assembly (50). The threaded connecting sleeve (44) is rotatably fitted onto the end of the bracket (41) adjacent to the fluid flow rate detection assembly (50). The temperature detection probe (42) and the pressure sampling probe (43) are located on the bracket (41) and exposed outside the bracket (41). The threaded connecting sleeve (44) is threadedly connected to the fluid flow rate detection assembly (50), and the washer (45) is clamped between the opposite ends of the fluid flow rate detection assembly (50) and the bracket (41).

8. The dry hot rock wellbore detection device according to claim 1, characterized in that, The heat insulation cavity (614) is provided with a second heat absorber (615).

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