Deep geothermal drilling rig suitable for complex geological environment

Abstract

The invention discloses a deep geothermal drilling device suitable for a complex geological environment, and relates to the technical field of geological drilling, the deep geothermal drilling device comprises a supporting plate, a driving assembly is fixedly connected to the top surface of the supporting plate, a drill rod is mounted on the driving assembly, a through hole is formed in the supporting plate, the bottom of the drill rod penetrates through the through hole and is detachably connected with a drill bit, and a central column is arranged in the drill rod; a containing cavity is formed between the center column and the inner wall of the drill rod, a plurality of adjusting assemblies are arranged on the center column in the axial direction at equal intervals, a plurality of buffer springs are fixedly connected to the adjusting assemblies in the circumferential direction, a base plate is fixedly connected to the ends, away from the adjusting assemblies, of the buffer springs, and the base plate is fixedly connected with the inner wall of the drill rod. Moving assemblies are fixedly connected to the four corners of the bottom face of the supporting plate correspondingly and make contact with the ground. The drilling efficiency and the success rate under complex geological conditions are remarkably improved, and the equipment damage rate is reduced.

Description

Technical Field

[0001] The invention relates to the field of geological drilling technology, and in particular to a deep geothermal drilling device suitable for complex geological environments. Background Art

[0002] As a clean and renewable energy, the development and utilization of geothermal energy is of great significance for alleviating energy pressure and reducing carbon emissions. Drilling equipment is usually used in the development process.

[0003] However, the exploration and development of deep geothermal resources face many challenges, especially the complex geological environment, such as high temperature and high pressure, large changes in rock hardness, and unstable formations, which greatly increase the difficulty and risk of drilling.

[0004] Therefore, there is an urgent need for a deep geothermal drilling device suitable for complex geological environments to solve the problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a deep geothermal drilling device suitable for complex geological environments to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a deep geothermal drilling device suitable for complex geological environments, including a support plate, a driving assembly fixedly connected to the top surface of the support plate, a drill rod installed on the driving assembly, a through hole opened on the support plate, the bottom of the drill rod passes through the through hole and is detachably connected to a drill bit, a center column is arranged in the drill rod, an accommodating cavity is formed between the center column and the inner wall of the drill rod, a plurality of adjusting assemblies are arranged at equal intervals along the axial direction on the center column, a plurality of buffer springs are fixedly connected to the adjusting assembly in the circumferential direction, the end of the buffer spring away from the adjusting assembly is fixedly connected to a pad, the pad is fixedly connected to the inner wall of the drill rod, a rotating assembly is installed in the accommodating cavity, the rotating assembly is transmission-connected to the adjusting assembly, and moving assemblies are respectively fixedly connected to the four corners of the bottom surface of the support plate, and the moving assembly is in contact with the ground.

[0007] Preferably, the adjusting assembly includes a fixed disk fixedly connected to the outer wall of the center column, the top surface of the fixed disk is rotated to be connected to a toothed disk, the toothed disk is rotationally connected to the center column, the toothed disk is transmission-connected to the rotating assembly, a plurality of arc grooves are provided on the toothed disk, a plurality of slide grooves are provided on the fixed disk, a slide column is embedded in the slide groove, the top of the slide column extends into the arc groove and is slidingly connected to the arc groove, an extrusion block is fixed to the side wall of the slide column, and the end of the buffer spring extends into the slide groove and is fixed to the extrusion block.

[0008] Preferably, the rotating assembly comprises a vertical shaft rotatably connected to the inner wall of the accommodating chamber, a plurality of gears are fixedly connected to the vertical shaft at equal intervals, and the plurality of gears and the plurality of toothed discs are arranged in one-to-one correspondence and mesh with each other.

[0009] Preferably, a pair of extension plates are fixedly connected to the inner wall of the accommodating cavity, a motor is fixedly connected to any one of the extension plates, a worm is fixedly connected to the output end of the motor, the worm is rotatably connected to the other extension plate, the worm is meshed with a worm wheel, and the worm wheel is fixedly connected to the vertical shaft.

[0010] Preferably, the driving assembly includes a first hydraulic rod symmetrically fixed to the top surface of the support plate, the output end of the first hydraulic rod is fixedly connected to a connecting seat, the connecting seat is fixedly connected to a drilling rig, and the drill rod is installed at the bottom of the drilling rig.

[0011] Preferably, a drill rod thread block is fixedly connected to the top of the drill rod, a thread groove is provided at the bottom of the drill rod, and the thread block is adapted to the thread groove.

[0012] Preferably, a drill thread block is fixedly connected to the top of the drill bit, and the drill thread block is threadedly connected to the thread groove.

[0013] Preferably, the moving assembly includes a mounting frame fixedly connected to the bottom surface of the support plate, and a universal wheel is installed at the bottom of the mounting frame, and the universal wheel is in contact with the ground.

[0014] Preferably, a mounting plate is fixedly connected to the mounting frame, a second hydraulic rod is symmetrically fixedly connected to the bottom surface of the mounting plate, an output end of the second hydraulic rod is fixedly connected to a support, and a plurality of ground spikes are fixedly connected to the bottom surface of the support.

[0015] Preferably, a cooling box is fixedly mounted on the bottom surface of the support plate.

[0016] The present invention discloses the following technical effects: when in use, the drill rod is installed on the driving assembly, the whole is transported to the target position by the moving assembly, and then the driving assembly is started to drive the drill rod to rotate and move downward to complete the drilling work; the buffer spring can absorb and transfer energy during the drilling process. When the drill rod is impacted or vibrated, the buffer spring can absorb part of the energy, reduce the wear and fatigue damage of the drill rod, and at the same time, the buffer spring can effectively transfer the energy during the drilling process to the drill bit, thereby improving the drilling efficiency. In addition, the preload of the buffer spring can be adjusted by the rotating assembly and the adjusting assembly, and the selection is made according to the hardness and stability of the formation. When encountering a hard formation, the preload is increased to increase the rigidity of the drill rod and enhance the penetration of the drilling tool; when encountering a soft formation, the preload is reduced to reduce the rigidity of the drill rod and reduce the risk of damage to the drill rod due to excessive bending. The present invention significantly improves the drilling efficiency and success rate under complex geological conditions and reduces the equipment damage rate; the replaceable drill bit enhances the flexibility of the drilling operation, and the buffer spring and the adjusting assembly are arranged in the drill rod to improve the adaptability of the drilling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the drill rod of the present invention;

[0020] Figure 3 For the present invention Figure 2 A partial enlarged view of middle A;

[0021] Figure 4 It is a structural schematic diagram of the toothed disc of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the fixed disk of the present invention;

[0023] Figure 6 It is an assembly diagram of the second hydraulic rod and the support plate of the present invention;

[0024] Figure 7 It is a front view of the present invention;

[0025] Figure 8 It is an assembly diagram of the drill bit and the drill rod of the present invention;

[0026] In the figure: 1. support plate; 2. first hydraulic rod; 3. connecting seat; 4. drilling rig; 5. mounting frame; 6. mounting plate; 7. universal wheel; 8. drill rod; 9. accommodating chamber; 10. motor; 11. worm; 12. worm wheel; 13. vertical shaft; 14. gear; 15. toothed disc; 16. fixed disc; 17. buffer spring; 18. arc groove; 19. slide groove; 20. extrusion block; 21. slide column; 22. second hydraulic rod; 23. support; 24. ground spike; 25. drill bit; 26. cooling box; 27. drill rod thread block; 28. thread groove; 29. ​​drill bit thread block; 30. center column. DETAILED DESCRIPTION

[0027] Geothermal resources are an important renewable energy source with great development potential. However, geothermal drilling often faces complex geological environments, such as porous and fractured thermal reservoirs, high temperature, high pressure, unstable formations, etc., which bring great challenges to drilling work. In order to solve these problems, a variety of deep geothermal drilling devices suitable for complex geological environments have been developed and applied.

[0028] The overall structure and function of the drilling device: Deep geothermal drilling devices usually consist of multiple key parts, including the drilling host, drill pipe, drill bit, mud circulation system, blowout preventer, casing and cementing equipment. Each part has its specific function and design to ensure the smooth progress of the drilling process. The drilling host is the core part of the drilling device, responsible for providing the torque, speed and axial pressure required for drilling. It usually consists of a power source (such as an engine or electric motor), a reducer, a transmission device and a control system. The power source drives the transmission device through the reducer, which in turn drives the drill pipe and the drill bit to rotate to achieve drilling of the formation. The drill pipe is a slender rod connecting the drilling host and the drill bit, responsible for transmitting torque and axial pressure. The drill pipe is usually made of high-strength, corrosion-resistant alloy materials to adapt to high temperature and high pressure drilling environments. The drill bit is a key component of the drilling device, which directly acts on the formation. The shape and material selection depends on the drilling purpose and formation characteristics. Common drill bit types include roller bits, scraper bits and diamond bits. The mud circulation system is used to inject mud into the borehole to cool the drill bit, carry cuttings, stabilize the well wall and balance the formation pressure. Mud is usually composed of water, bentonite, polymer and other additives, and has good fluidity, suspension and stability. The mud circulation system includes mud pumps, mud tanks, mud pipelines and mud purification equipment. The blowout preventer is used to prevent the high-pressure fluid in the borehole from spraying out to ensure the safety of the drilling process. It usually consists of a blowout preventer, a gate, a pressure gauge and a control system. The blowout preventer prevents the fluid from spraying out by controlling the pressure in the borehole; the gate is used to cut off the fluid channel; the pressure gauge is used to monitor the pressure change in the borehole. The casing is used to protect the borehole wall to prevent formation collapse and fluid leakage. It is usually made of steel pipe and has good strength and sealing. Cementing equipment is used to fix the casing in the borehole, usually using cement cementing. The cement cementing method injects cement slurry into the annular space between the casing and the borehole wall, and forms a solid cement ring after the cement slurry solidifies, thereby fixing the casing.

[0029] Features of drilling equipment suitable for complex geological environments: Deep geothermal drilling in complex geological environments requires drilling equipment to have a variety of special functions and technical features to adapt to the instability of the formation, high temperature and high pressure, porous fractures and other problems. During the drilling process, due to the porosity and fractures of the formation, the drilling fluid is easy to leak, resulting in an imbalance of formation pressure. In order to maintain the balance of formation pressure and prevent formation collapse and fluid leakage, pressure balance drilling technology is required. This technology balances the pressure in the borehole with the formation pressure by precisely controlling the injection volume and pressure of the mud. At the same time, clean water, high-quality light mud or air can also be used for pressure balance drilling to reduce damage to the formation. Deep geothermal drilling often faces a high temperature environment, which can reach 100-200℃ or even higher. High temperature will cause thermal expansion, increased thermal stress and performance degradation of drilling materials. Therefore, high temperature resistant drilling materials and technologies are required. For example, use high-temperature resistant alloy drill pipes, drill bits and mud materials; use high-temperature resistant sepiolite mud, high-temperature treatment agents, etc.; equip solid phase control equipment and cooling towers to reduce the temperature of the mud and maintain its stability. During the drilling process, the chemicals in the mud and formation fluids may corrode the drilling equipment and pipes, and the waste mud and noise generated by drilling may also pollute the environment. Therefore, anti-corrosion and environmental protection measures need to be taken. For example, apply anti-corrosion paint or nitriding treatment on the surface of the drilling equipment; use mufflers, separators and other equipment to reduce noise; use chemical methods (such as hydrogen peroxide, sponge iron, etc.) to treat waste mud to reduce pollution to the environment. Drilling work in complex geological environments often faces the problem of formation diversity and complexity. In order to overcome these difficulties, a variety of drilling methods and processes need to be adopted. For example, for low-temperature geothermal wells, roller bits or scraper bits can be used for comprehensive drilling; for medium and high-temperature geothermal wells, pressure balance drilling is often used; for deep formations, down-the-hole hammers and diamond drill bits can be used for drilling. At the same time, appropriate flushing media and drilling tools can be selected according to the characteristics of the formation to improve drilling efficiency and safety. With the continuous development of drilling technology, various advanced drilling equipment and processes are applied to deep geothermal drilling. For example, the reverse circulation drilling rig is a drilling equipment suitable for complex geological conditions. Its drilling principle is the same as that of the rotary drilling rig, but the depth of the circulating mud is limited. It is suitable for the mining of important land such as riverbeds and flood plains, as well as rock geological materials. In addition, there are coaxial shell and tube heat exchangers, automated drilling rigs and other equipment and technologies. The application of these equipment and technologies improves drilling efficiency and quality, and reduces drilling costs and environmental impacts.

[0030] Key components and technical details of drilling equipment: The key components and technical details of deep geothermal drilling equipment are crucial to the success of the drilling process. These components and details are described in detail below. The drill bit is one of the most critical components of the drilling equipment, and its performance directly affects the drilling efficiency and cost. When selecting a drill bit, factors such as formation characteristics, drilling purpose and drilling method need to be considered. For example, for low-temperature geothermal wells, roller bits or scraper bits are often used; for medium and high-temperature geothermal wells, diamond bits or composite bits are often used. At the same time, the drill bit needs to be optimized to improve its wear resistance, impact resistance and cutting efficiency. The mud system is crucial to the stability and safety of the drilling process. Optimizing the mud system can improve the cooling effect, rock carrying capacity and wall protection performance of the mud. For example, the performance of the mud can be improved by adjusting the mud ratio and the type and amount of additives; using advanced mud purification equipment to improve the cleanliness and stability of the mud; and using solid phase control equipment to control the solid content and particle size distribution in the mud. Casing and cementing technology are important means to protect the borehole wall and ensure drilling safety. When selecting casing, factors such as formation pressure, temperature and fluid properties need to be considered. At the same time, the casing needs to be treated with corrosion protection and optimized design to improve its service life and sealing performance. In the cementing process, advanced cement cementing technology and equipment need to be adopted, such as adding high-temperature resistant materials such as silicon powder and styrene to improve the high-temperature resistance of cement; advanced grouting equipment and processes are used to ensure the uniform injection and solidification of cement slurry. Blowout preventers are key equipment to ensure the safety of the drilling process. When designing blowout preventers, factors such as formation pressure, fluid properties and drilling technology need to be considered. At the same time, blowout preventers, gates and control systems need to be optimized, designed and installed to ensure their reliability and stability. For example, multi-stage blowout preventers can be used to improve blowout prevention capabilities; remote control systems can be used to reduce personnel risks and increase emergency response speed. Monitoring and control of drilling parameters are crucial to ensuring the stability and safety of the drilling process. Common drilling parameters include torque, speed, axial pressure, mud flow and pressure. By monitoring these parameters in real time, abnormal situations in the drilling process can be discovered and handled in a timely manner. At the same time, advanced control systems and algorithms can be used to optimize drilling parameters and improve drilling efficiency and safety. For example, intelligent control systems can be used to automatically adjust drilling parameters; data mining and machine learning algorithms can be used to predict and analyze potential risks in the drilling process.

[0031] In summary, deep geothermal drilling devices suitable for complex geological environments have made significant progress and achievements. These devices and technologies have shown good stability and safety during the drilling process, while significantly improving drilling efficiency and quality. However, with the continuous deepening of geothermal resource development and the increasing complexity of the geological environment, higher requirements are placed on drilling devices and technologies. Although deep geothermal drilling devices have achieved remarkable results, there are still some limitations and challenges that require further research and improvement. Although some high-temperature resistant drilling materials have been developed, the performance of these materials will still be affected to a certain extent at extremely high temperatures. For example, high temperatures can cause thermal expansion and increased thermal stress of materials, and may even cause material failure. Therefore, it is necessary to continue to research and develop materials with higher high-temperature resistance to meet the drilling needs at higher temperatures. Under complex geological conditions, such as porous and fractured thermal reservoirs, the selection and optimization of drilling processes become more difficult. Traditional drilling processes may not meet the needs under these special geological conditions, so new drilling processes and technologies need to be developed to improve drilling efficiency and safety. The mud system plays a vital role in the drilling process, but its stability and environmental protection still face some challenges. For example, the mud may change under high temperature and high pressure environment, resulting in its performance degradation; at the same time, the discharge and treatment of the mud may also cause environmental pollution. Therefore, it is necessary to continue to study and improve the stability and environmental protection of the mud system to adapt to more complex geological environments and stricter environmental protection requirements. With the continuous development of intelligent and automated technologies, the intelligence and automation level of drilling equipment is also constantly improving. However, the current intelligence and automation level of drilling equipment is still limited and cannot fully meet the drilling needs in complex geological environments. Therefore, it is necessary to continue to research and develop more advanced intelligent and automated technologies to improve the performance and efficiency of drilling equipment.

[0032] In view of the limitations and challenges of existing technologies, deep geothermal drilling equipment and technology will show the following development trends in the future: In the future, new drilling materials with higher resistance to high temperature, corrosion and wear will continue to be researched and developed to adapt to more complex geological environments and higher drilling needs. With the increasing complexity of the geological environment and the continuous increase in drilling needs, it will be necessary to continuously innovate and optimize drilling processes. For example, develop special drilling processes suitable for porous and fractured thermal reservoirs; research new technologies and methods to improve drilling efficiency and safety. In the future, the stability and environmental protection of the mud system will continue to be studied and improved. For example, develop mud formulas with higher stability and high temperature resistance; research environmental protection treatment technologies and methods for mud to reduce pollution to the environment. With the continuous development of intelligent and automated technologies, drilling equipment will achieve a higher degree of intelligence and automation in the future. For example, use advanced sensors and control systems to monitor and adjust drilling parameters in real time; develop advanced technologies such as intelligent drilling robots and remote control systems to improve drilling efficiency and safety. In the future, the development and utilization of deep geothermal resources will pay more attention to comprehensive planning and sustainable development. For example, scientific and reasonable planning and layout are carried out by combining geological, environmental, economic and other factors; research on comprehensive utilization technologies and methods of geothermal resources to improve resource utilization and economic benefits.

[0033] The application and development of deep geothermal drilling equipment and technology in complex geological environments have achieved remarkable results and progress. However, with the continuous deepening of geothermal resource development and the increasing complexity of the geological environment, higher requirements are placed on drilling equipment and technology. In the future, we will continue to research and develop new drilling materials, innovative drilling processes, improved mud systems, upgraded drilling equipment and other technologies and methods to adapt to more complex geological environments and higher drilling needs. At the same time, it is also necessary to strengthen the comprehensive planning and sustainable development of geothermal resource development and utilization to achieve long-term stability and efficient utilization of geothermal resources.

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 1-Figure 8As shown, this embodiment provides a deep geothermal drilling device suitable for complex geological environments, including a support plate 1, a driving assembly fixedly connected to the top surface of the support plate 1, a drill rod 8 is installed on the driving assembly, a through hole is opened on the support plate 1, the bottom of the drill rod 8 passes through the through hole and is detachably connected to a drill bit 25, a center column 30 is arranged in the drill rod 8, and an accommodating cavity 9 is formed between the center column 30 and the inner wall of the drill rod 8, a plurality of adjusting assemblies are arranged at equal intervals along the axial direction of the center column 30, a plurality of buffer springs 17 are fixedly connected to the adjusting assembly in the circumferential direction, and a pad is fixedly connected to the end of the buffer spring 17 away from the adjusting assembly, and the pad is fixedly connected to the inner wall of the drill rod 8, a rotating assembly is installed in the accommodating cavity 9, and the rotating assembly is transmission-connected to the adjusting assembly, and moving assemblies are respectively fixedly connected to the four corners of the bottom surface of the support plate 1, and the moving assembly is in contact with the ground.

[0037] When in use, the drill rod 8 is installed on the driving assembly, and the whole is transported to the target position through the moving assembly, and then the driving assembly is started to drive the drill rod 8 to rotate and move downward to complete the drilling work; the buffer spring 17 can absorb and transfer energy during the drilling process. When the drill rod 8 is impacted or vibrated, the buffer spring 17 can absorb part of the energy and reduce the wear and fatigue damage of the drill rod 8. At the same time, the buffer spring 17 can also effectively transfer the energy during the drilling process to the drill bit 25 to improve the drilling efficiency. In addition, the preload force of the buffer spring 17 can be adjusted by the rotating assembly and the adjusting assembly, and it can be selected according to the hardness and stability of the formation. When encountering a hard formation, the preload force is increased to increase the rigidity of the drill rod 8 and enhance the penetration of the drilling tool; when encountering a soft formation, the preload force is reduced to reduce the rigidity of the drill rod 8 and reduce the risk of damage to the drill rod 8 due to excessive bending. The present invention significantly improves the drilling efficiency and success rate under complex geological conditions and reduces the equipment damage rate; the replaceable drill bit 25 enhances the flexibility of the drilling operation, and the buffer spring 17 and the adjustment assembly provided in the drill rod 8 improve the adaptability of the drilling operation.

[0038] Furthermore, the drill bit 25 is detachably connected to the drill rod 8, and a diamond drill bit 25, an alloy drill bit 25 or a drill bit 25 with a water jet-assisted crushing function can be selected according to different formation characteristics, and is equipped with a pressure feedback system to automatically adjust the drilling pressure and rotation speed to maintain optimal drilling efficiency.

[0039] Further optimized solution, the adjustment assembly includes a fixed disk 16 fixedly connected to the outer wall of the center column 30, the top surface of the fixed disk 16 rotates to be connected to the toothed disk 15, the toothed disk 15 is rotationally connected to the center column 30, the toothed disk 15 is transmission-connected to the rotating assembly, a plurality of arc grooves 18 are provided on the toothed disk 15, a plurality of slide grooves 19 are provided on the fixed disk 16, a slide column 21 is embedded in the slide groove 19, the top of the slide column 21 extends into the arc groove 18 and is slidably connected to the arc groove 18, an extrusion block 20 is fixedly connected to the side wall of the slide column 21, and the end of the buffer spring 17 extends into the slide groove 19 and is fixedly connected to the extrusion block 20. The rotating assembly drives the toothed disk 15 to rotate, the toothed disk 15 drives the arc groove 18 to rotate, and when the arc groove 18 rotates, the slide column 21 is driven to move, the slide column 21 drives the extrusion block 20 to move, and the extrusion block 20 squeezes or relaxes the buffer spring 17, thereby achieving the purpose of adjusting the preload.

[0040] In a further optimized solution, the rotating assembly includes a vertical shaft 13 rotatably connected to the inner wall of the accommodating chamber 9, and a plurality of gears 14 are fixedly connected to the vertical shaft 13 at equal intervals. The plurality of gears 14 and the plurality of toothed discs 15 are arranged one by one and mesh with each other. When the vertical shaft 13 rotates, the gears 14 are driven to rotate, and the gears 14 drive the toothed discs 15 to rotate, thereby facilitating adjustment.

[0041] Further optimization scheme, a pair of extension plates are fixedly connected to the inner wall of the accommodating cavity 9, a motor 10 is fixedly connected to any extension plate, a worm 11 is fixedly connected to the output end of the motor 10, the worm 11 is rotatably connected to the other extension plate, the worm 11 is meshed with a worm wheel 12, and the worm wheel 12 is fixedly connected to the vertical shaft 13. The motor 10 drives the worm 11 to rotate, the worm 11 drives the worm wheel 12 to rotate, the worm wheel 12 drives the vertical shaft 13 to rotate, and the worm wheel 12 and the worm 11 have a self-locking function to improve the accuracy of adjustment.

[0042] In a further optimized solution, the driving assembly includes a first hydraulic rod 2 symmetrically fixed to the top surface of the support plate 1, the output end of the first hydraulic rod 2 is fixedly connected to a connecting seat 3, the connecting seat 3 is fixedly connected to a drilling rig 4, and a drill rod 8 is installed at the bottom of the drilling rig 4. The drilling rig 4 drives the drill rod 8 to rotate, and the first hydraulic rod 2 drives the drilling rig 4 to move downward, thereby realizing the drilling work.

[0043] In a further optimized solution, a drill rod thread block 27 is fixed to the top of the drill rod 8, a thread groove 28 is provided at the bottom of the drill rod 8, and the thread block is adapted to the thread groove 28. The setting of the drill rod thread block 27 facilitates the connection between the drill rods 8, so that drilling work at different depths can be completed.

[0044] In a further optimized solution, a drill bit thread block 29 is fixedly connected to the top of the drill bit 25, and the drill bit thread block 29 is threadedly connected to the thread groove 28. The provision of the drill bit thread block 29 facilitates the replacement of the drill bit 25 and expands the scope of application.

[0045] In a further optimized solution, the mobile assembly includes a mounting frame 5 fixed to the bottom surface of the support plate 1, and a universal wheel 7 is installed at the bottom of the mounting frame 5, and the universal wheel 7 is in contact with the ground. Through the setting of the universal wheel 7, the entire device can be moved to any target position, and the drilling point can be quickly changed, which has strong adaptability and high efficiency.

[0046] Further optimization scheme, the mounting frame 5 is fixed with a mounting plate 6, the bottom surface of the mounting plate 6 is symmetrically fixed with a second hydraulic rod 22, the output end of the second hydraulic rod 22 is fixed with a support 23, and the bottom surface of the support 23 is fixed with a plurality of ground spikes 24. When reaching the target position, the second hydraulic rod 22 is started to drive the support 23 to move until the support 23 contacts the ground and the universal wheel 7 is separated from the ground, and the support is completed. The ground spikes 24 can improve the grip and enhance stability.

[0047] In a further optimized solution, a cooling box 26 is fixedly installed on the bottom surface of the support plate 1. The setting of the cooling box 26 can ensure the stable operation of the equipment and improve the energy recovery efficiency.

[0048] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A deep geothermal drilling device suitable for complex geological environments, characterized by: The invention comprises a support plate (1), the top surface of the support plate (1) is fixedly connected with a driving component, a drill rod (8) is installed on the driving component, a through hole is opened on the support plate (1), the bottom of the drill rod (8) passes through the through hole and is detachably connected with a drill bit (25), a central column (30) is arranged in the drill rod (8), a receiving chamber (9) is formed between the central column (30) and the inner wall of the drill rod (8), a plurality of adjustment components are arranged at equal intervals along the axial direction of the central column (30), a plurality of buffer springs (17) are fixedly connected to the adjustment component in the circumferential direction, a pad is fixedly connected to one end of the buffer spring (17) away from the adjustment component, the pad is fixedly connected to the inner wall of the drill rod (8), a rotating component is installed in the receiving chamber (9), the rotating component is in transmission connection with the adjusting component, and the four corners of the bottom surface of the support plate (1) are respectively fixedly connected with moving components, and the moving components are in contact with the ground.

2. The deep geothermal drilling device suitable for complex geological environments according to claim 1, characterized in that: The adjustment component comprises a fixed disk (16) fixedly connected to the outer wall of the central column (30); the top surface of the fixed disk (16) is rotated to be connected to a toothed disk (15); the toothed disk (15) is rotationally connected to the central column (30); the toothed disk (15) is transmission-connected to the rotating component; a plurality of arc grooves (18) are provided on the toothed disk (15); a plurality of slide grooves (19) are provided on the fixed disk (16); a slide column (21) is embedded in the slide groove (19); the top of the slide column (21) extends into the arc groove (18) and is slidably connected to the arc groove (18); an extrusion block (20) is fixedly connected to the side wall of the slide column (21); an end of the buffer spring (17) extends into the slide groove (19) and is fixedly connected to the extrusion block (20).

3. The deep geothermal drilling device suitable for complex geological environments according to claim 2 is characterized in that: The rotating assembly comprises a vertical shaft (13) rotatably connected to the inner wall of the accommodating chamber (9), a plurality of gears (14) are fixedly connected to the vertical shaft (13) at equal intervals, and the plurality of gears (14) and the plurality of toothed discs (15) are arranged in one-to-one correspondence and mesh with each other.

4. The deep geothermal drilling device suitable for complex geological environments according to claim 3 is characterized in that: A pair of extension plates are fixedly connected to the inner wall of the accommodating cavity (9), a motor (10) is fixedly connected to any one of the extension plates, a worm (11) is fixedly connected to the output end of the motor (10), the worm (11) is rotatably connected to the other extension plate, the worm (11) is meshed with a worm wheel (12), and the worm wheel (12) is fixedly connected to the vertical shaft (13).

5. The deep geothermal drilling device suitable for complex geological environments according to claim 1, characterized in that: The driving assembly comprises a first hydraulic rod (2) symmetrically fixed to the top surface of the support plate (1); the output end of the first hydraulic rod (2) is fixedly connected to a connecting seat (3); the connecting seat (3) is fixedly connected to a drilling rig (4); and the drill rod (8) is installed at the bottom of the drilling rig (4).

6. The deep geothermal drilling device suitable for complex geological environments according to claim 1, characterized in that: A drill rod thread block (27) is fixedly connected to the top of the drill rod (8), a thread groove (28) is provided at the bottom of the drill rod (8), and the thread block is adapted to the thread groove (28).

7. The deep geothermal drilling device suitable for complex geological environments according to claim 6, characterized in that: A drill thread block (29) is fixedly connected to the top of the drill bit (25), and the drill thread block (29) is threadedly connected to the thread groove (28).

8. The deep geothermal drilling device suitable for complex geological environments according to claim 1, characterized in that: The moving assembly comprises a mounting frame (5) fixedly connected to the bottom surface of the support plate (1), and a universal wheel (7) is installed at the bottom of the mounting frame (5), and the universal wheel (7) is in contact with the ground.

9. The deep geothermal drilling device suitable for complex geological environments according to claim 8, characterized in that: A mounting plate (6) is fixedly connected to the mounting frame (5), a second hydraulic rod (22) is symmetrically fixedly connected to the bottom surface of the mounting plate (6), an output end of the second hydraulic rod (22) is fixedly connected to a support (23), and a plurality of ground spikes (24) are fixedly connected to the bottom surface of the support (23).

10. The deep geothermal drilling device suitable for complex geological environments according to claim 1, characterized in that: A cooling box (26) is fixedly mounted on the bottom surface of the support plate (1).

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