Integrated high-pressure drilling machine for supercritical CO2 jet rock breaking and using method

Abstract

The invention discloses an integrated high-pressure drilling machine for supercritical CO2 jet rock breaking and a using method, and belongs to the technical field of high-pressure drilling machines. The drilling device comprises a lifting mechanism, a drilling mechanism is arranged on one side of the lifting mechanism, and a driving mechanism connected with the drilling mechanism is further arranged on the lifting mechanism. The lifting mechanism comprises a side table, a first side plate, a second side plate, a threaded column and a lifting table. The drilling mechanism comprises an extension table, a first bearing, a drill rod and a drill bit. Flexible adjustment and accurate positioning of the drilling depth are achieved through the lifting mechanism, a motor in the lifting mechanism drives a threaded column to rotate forwards and backwards, a threaded barrel and the lifting table are driven to stably move up and down along the side table, and therefore the vertical position of a drill rod and a drill bit is adjusted; and meanwhile, the hydraulic cylinder pushes the extrusion block to abut against the side table for auxiliary fixing, and it is guaranteed that the stable working posture can be kept at any height.

Description

Technical Field

[0001] This invention relates to the field of high-pressure drilling technology, specifically to an integrated high-pressure drilling rig for supercritical CO2 jet rock breaking and its usage method. Background Technology

[0002] Supercritical CO2 jet rock breaking technology is an advanced rock crushing technology that utilizes the unique physical properties of carbon dioxide (CO2) in a supercritical state to break rocks through high-pressure jets. This technology has advantages such as high efficiency, environmental friendliness, and safety, and is widely used in mining, tunneling, and other fields. Integrated high-pressure drilling rigs are core equipment in supercritical CO2 jet rock breaking technology. They integrate components such as high-pressure pumps, control systems, and drill bits, enabling efficient rock crushing. For example, the utility model patent with authorization announcement number CN214118077U discloses a multi-directional high-pressure jet grouting drilling rig, which relates to the field of mechanical engineering technology. It includes a worktable, moving wheels, a rotating mechanism, a moving component, a translation component, and a telescopic drilling device. The tracked moving wheels allow the device to move and operate in complex terrain. The rotating mechanism drives the telescopic drilling device to rotate, expanding its working range and enabling multi-directional drilling. The translation component allows the telescopic drilling device to move horizontally. Combined with the rotating mechanism, this further expands the working range and area of ​​the telescopic drilling device. The cooperation of these components enables multi-directional drilling, improving the practicality of the device.

[0003] Currently, the working principle of integrated high-pressure drilling rigs mainly utilizes high-pressure liquid or gas to drive the drill bit to rotate, thereby achieving rock breaking and drilling. Specifically, the high-pressure liquid or gas generated by the high-pressure pump is transmitted to the drill bit through the drill rod, driving the drill bit to rotate. At the same time, the drill bit contacts the rock during rotation, generating friction and shearing force, thereby breaking the rock. However, most high-pressure drilling rigs have a single high-pressure jet structure as the drive unit. If the component used to transmit and receive the impact of high-pressure liquid is damaged, the entire drilling rig will stop working. In addition, the single drive structure will also be affected by resistance during the rock breaking process, greatly reducing efficiency. Furthermore, some drill rods are quite long, and if the front end of the drill rod is not supported, deformation can easily occur in the area where the drill rod is close to the drill bit. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated high-pressure drilling rig and its usage method for supercritical CO2 jet rock breaking, in order to solve the problem of construction process stagnation caused by the failure of a single drive structure. At the same time, when the drill rod is too long, the drill rod can be locally protected.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An integrated high-pressure drilling rig for supercritical CO2 jet rock breaking includes a lifting mechanism, a drilling mechanism on one side of the lifting mechanism, and a drive mechanism connected to the drilling mechanism. The lifting mechanism includes a side platform, a first side plate, a second side plate, a threaded column, and a lifting platform, with the lifting platform slidably engaged with the surface of the side platform. The first side plate is welded and fixed to the upper end of one side of the side platform, and the second side plate is welded and fixed to the lower end of one side of the side platform. A rod seat is provided at the upper end of the second side plate, and a threaded column is rotatably mounted inside the rod seat. A rod sleeve is passed through the interior of the first side plate, and the surface of the threaded column is rotatably fitted into the interior of the rod sleeve. A motor is provided at the upper end of the threaded column, and a drive shaft is provided inside the motor. The end of the drive shaft is fixedly connected to the threaded column via a coupling.

[0007] The drilling mechanism includes an extension platform, a bearing, a drill rod, and a drill bit. One end of the extension platform is connected to a lifting platform, and the bearing is horizontally positioned at the other end of the extension platform. The drill rod is internally mounted on the bearing, and the drill bit is mounted at the lower end of the drill rod. Several mounting heads are distributed at the connection point between the drill bit and the drill rod. Any mounting head is welded and fixed to the end surface of the drill rod, and the mounting head is assembled and fixed to the drill bit by bolts. A protective sleeve is provided on the drill rod near the drill bit. The inside of the protective sleeve is slidably fitted with the surface of the drill rod. Two connecting rods are symmetrically distributed on the upper end of the protective sleeve, and the two ends of the connecting rods are fixedly installed to the end face of the protective sleeve and the lower end of the extension platform, respectively.

[0008] The drive mechanism includes a side plate, a drive shaft, a sealing cover, a second bearing, and blades. The surface of the side plate is fixedly installed to the lifting platform by a bracket. The drive shaft is welded and fixed at the connection position with the drill rod. Two sealing covers of the same specification are distributed along the vertical position of the surface of the drive shaft. The outer ring wall of the sealing cover is fixed to the surface of the side plate by a bracket. A second bearing is provided at the penetration position between the sealing cover and the drive shaft. The surface of the drive shaft is provided with several blades, and any one of the blades is fixed to the surface of the drive shaft by welding.

[0009] Furthermore, the connection between the rod seat and the second side plate is fixed by screws, the connection between the rod sleeve and the threaded column is fixed by screws, the outer wall of the motor is fixed to the upper end of the side platform by a bracket, and a forward and reverse switch of model HY2-8 is externally connected to the motor to control the forward and reverse rotation of the motor.

[0010] Furthermore, a threaded cylinder is installed through the interior of the lifting platform. The connection between the threaded cylinder and the lifting platform is fixed by screws. The interior of the threaded cylinder and the surface of the threaded column are threaded through each other. The threaded cylinder moves by rotating the threaded column in both directions.

[0011] Furthermore, a number of traction sleeves are distributed on the side of the side platform away from the threaded column. The outer ring wall of the traction sleeve is fixedly installed to the side platform through a bracket. The traction sleeves are arranged at equal intervals along the vertical position. The traction sleeves are staggered with the lifting platform. The traction sleeves can be installed with a locomotive with a robotic arm. By adjusting the robotic arm, the traction sleeve can move the position or adjust the angle of the side platform.

[0012] Furthermore, the lifting platform has symmetrical notches on the side away from the threaded column, and a hydraulic cylinder is installed through the inside of the notch. The connection between the hydraulic cylinder and the lifting platform is fixed by screws. The hydraulic cylinder has a piston rod for extension and retraction inside, and a pressing block is fixedly installed at the end of the piston rod. The end of the pressing block away from the hydraulic cylinder is tightly attached to the surface of the side platform. When the lifting platform moves to any height, the piston rod of the hydraulic cylinder extends, so that the pressing block can compact and position the side platform.

[0013] Furthermore, the extension platform has an L-shaped structure, and the connection between the extension platform and the outer ring wall of the bearing is fixed by screws. The surface of the drill rod is interference-fitted with the inner ring wall of the bearing. The end of the drill bit has a gradient plum blossom structure. The distance between the protective sleeve and the drill bit is not less than 20cm, and the distance between the farthest ends of the two connecting rods does not exceed the diameter width of the drill bit.

[0014] Furthermore, the second bearing is a sealed bearing. The outer ring wall of the second bearing is fixed to the sealing cover by welding. The inner ring wall of the second bearing is installed with an interference fit to the surface of the drive shaft. Several blades are arranged in a ring at equal intervals along the surface of the drive shaft. When the blades are impacted by high-pressure liquid, they move rapidly and drive the drive shaft to rotate at high speed. The drive shaft drives the drill rod and drill bit to rotate synchronously.

[0015] Furthermore, a high-pressure water pump is also provided on one side of the side plate. The outer wall of the high-pressure water pump is fixedly installed to the surface of the side plate by a bracket. The outlet flange of the high-pressure water pump is equipped with a diversion interface. The surface of any one of the sealing covers is respectively provided with an inlet interface and an outlet interface. The inlet interface and the outlet interface are fixed to the connection position of the sealing cover by welding. The diversion end of the diversion interface is respectively connected to the corresponding inlet interface flange. High-pressure liquid is transported by a single high-pressure water pump and synchronously transported to the two sealing covers through the diversion interface for driving the blades.

[0016] This invention provides another technical solution: a method for using an integrated high-pressure drilling rig for supercritical CO2 jet rock breaking, comprising the following steps:

[0017] S1: After the motor is powered on, its internal shaft drives the threaded column to rotate through the coupling. The threaded column and the threaded cylinder fixed to the lifting platform form a threaded pair, thereby driving the lifting platform to move up and down.

[0018] S2: The drilling mechanism and the drive mechanism are raised and lowered synchronously to the designated position along with the lifting platform. The supercritical CO2 fluid is pressurized by the high-pressure water pump and distributed to the water inlet of the two sealed covers through the diversion interface. The impact of the ring-shaped blades rotates, thereby driving the drive shaft to rotate at high speed.

[0019] S3: The drive shaft drives the drill rod and drill bit to rotate synchronously, realizing the rock breaking function;

[0020] S4: Finally, the hydraulic cylinder pushes the piston rod to extend, causing the extrusion block to press tightly against the side platform surface, forming a friction lock on the lifting platform.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The integrated high-pressure drilling rig and its method of use for supercritical CO2 jet rock breaking of the present invention realizes flexible adjustment and precise positioning of drilling depth through the lifting mechanism. The motor in the lifting mechanism drives the threaded column to rotate forward and backward, driving the threaded cylinder and the lifting platform to move stably up and down along the side platform, thereby adjusting the vertical position of the drill rod and drill bit. The lifting platform has a multi-face contact design to prevent detachment and limit the movement. At the same time, the hydraulic cylinder pushes the extrusion block to press against the side platform for auxiliary fixation, ensuring that a stable working posture can be maintained at any height.

[0023] 2. The integrated high-pressure drilling rig and its method of use for supercritical CO2 jet rock breaking of the present invention, wherein the drill rod is supported on the extension platform by a bearing to ensure smooth rotation; the drive shaft is sealed and supported by a bearing in a sealed cover, and supercritical carbon dioxide fluid is delivered by a high-pressure water pump to impact the blades, driving the drive shaft to rotate at high speed, and finally transmitting torque to the drill bit. The drill bit with a plum blossom gradient structure enhances the rock breaking ability and durability, while the protective sleeve and connecting rod wrap and support the lower part of the drill rod to prevent the long drill rod from bending and deforming under high pressure, thereby maintaining the straightness of the borehole and the overall stability of the equipment.

[0024] 3. The integrated high-pressure drilling rig and its usage method for supercritical CO2 jet rock breaking of the present invention have a traction sleeve design that allows the spatial position and angle of the entire drilling rig to be adjusted by an external mechanical arm, thus expanding the application range. The high-pressure water pump delivers fluid to two sealing covers simultaneously through a diversion interface, realizing dual-point drive and enhancing the balance and reliability of power output. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the high-pressure drilling rig of the present invention;

[0026] Figure 2 This is an isometric view of the high-pressure drilling rig of the present invention;

[0027] Figure 3 This is a bottom view of the high-pressure drilling rig of the present invention at the drill bit position;

[0028] Figure 4 This is a schematic diagram of the back of the lifting platform of the present invention;

[0029] Figure 5 This is a front view of the drive mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the interior of the sealing cover and the distribution of the blades in this invention.

[0031] In the diagram: 1. Lifting mechanism; 10. Side platform; 11. Side plate one; 12. Side plate two; 13. Rod seat; 14. Threaded column; 15. Rod sleeve; 16. Motor; 17. Lifting platform; 18. Threaded cylinder; 19. Traction sleeve; 101. Hydraulic cylinder; 102. Extrusion block; 2. Drilling mechanism; 20. Extension platform; 21. Bearing one; 22. Drill rod; 23. Drill bit; 24. Mounting head; 25. Protective sleeve; 26. Connecting rod; 3. Drive mechanism; 30. Side plate; 31. Drive shaft; 32. Sealing cover; 33. Bearing two; 34. Blade; 35. Water inlet; 36. Water outlet; 301. High-pressure water pump; 302. Diverter interface. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-6 This invention provides an integrated high-pressure drilling rig for supercritical CO2 jet rock breaking, including a lifting mechanism 1, a drilling mechanism 2 on one side of the lifting mechanism 1, and a drive mechanism 3 connected to the drilling mechanism 2 on the lifting mechanism 1.

[0034] Specifically, the lifting mechanism 1 includes a side platform 10, a first side plate 11, a second side plate 12, a threaded column 14, and a lifting platform 17. The first side plate 11 and the second side plate 12 are respectively provided on one side of the side platform 10. The first side plate 11 is located at the upper end of the side platform 10, and the second side plate 12 is located at the lower end of the side platform 10. Both the first side plate 11 and the second side plate 12 are fixed to the surface of the side platform 10 by welding. A rod seat 13 is provided at the upper end of the second side plate 12. The connection between the rod seat 13 and the second side plate 12 is fixed by screws. A threaded column 14 is rotatably installed inside the rod seat 13. A rod sleeve 15 is passed through the inside of the first side plate 11. The connection point with the threaded column 14 is fixed by screws. The surface of the threaded column 14 is rotatably sleeved with the inside of the sleeve 15. A motor 16 is installed at the upper end of the threaded column 14. The outer wall of the motor 16 is fixed to the upper end of the side platform 10 by a bracket. The motor 16 has a drive shaft inside, and the end of the shaft is fixedly connected to the threaded column 14 by a coupling. Side plate 11 ensures the stable installation of the sleeve 15, and side plate 12 ensures the fixed position of the rod seat 13. The sleeve 15 and the rod seat 13 provide rotational support for the threaded column 14. The motor 16 is connected to the power supply to enable... The rotating shaft can rotate, allowing the threaded column 14 to move stably in linkage. The motor 16 is externally connected to a forward and reverse switch, model HY2-8, which can operate the motor 16 in both directions. A lifting platform 17 slides and engages with the surface of the side platform 10. The lifting platform 17 achieves anti-disengagement limit by contacting the side platform 10 on multiple surfaces. A threaded cylinder 18 is installed through the interior of the lifting platform 17. The connection between the threaded cylinder 18 and the lifting platform 17 is fixed by screws. The interior of the threaded cylinder 18 and the surface of the threaded column 14 are threaded through each other. The forward and reverse rotation of the threaded column 14... Rotation enables the movement of the threaded cylinder 18. The lifting platform 17 slides and is limited on the side platform 10, allowing the lifting platform 17 itself to move stably up and down. Several traction sleeves 19 are distributed on the side of the side platform 10 away from the threaded column 14. The outer ring wall of the traction sleeve 19 is fixedly installed to the side platform 10 through a bracket. The traction sleeves 19 are arranged at equal intervals along the vertical position. The traction sleeves 19 and the lifting platform 17 are staggered. The traction sleeves 19 can be installed with a locomotive with a robotic arm. By adjusting the robotic arm, the traction sleeves 19 can move part of the side platform 10 in position or adjust the angle.

[0035] In addition, the lifting platform 17 has symmetrical notches on the side away from the threaded column 14, and a hydraulic cylinder 101 is installed through the inside of the notch. The connection between the hydraulic cylinder 101 and the lifting platform 17 is fixed by screws. The hydraulic cylinder 101 has a piston rod for extension and retraction, and a pressing block 102 is fixedly installed at the end of the piston rod. The end of the pressing block 102 away from the hydraulic cylinder 101 is tightly attached to the surface of the side platform 10. When the lifting platform 17 moves to any height, the piston rod of the hydraulic cylinder 101 extends, so that the pressing block 102 can press against the side platform 10, thereby achieving auxiliary positioning of the lifting platform 17.

[0036] The drilling mechanism 2 in this embodiment of the invention includes an extension platform 20, a bearing 21, a drill rod 22, and a drill bit 23. The extension platform 20 has an L-shaped structure. The vertical end of the extension platform 20 is fixed to the lower end of the lifting platform 17 by screws. The bearing 21 is horizontally installed through the extension platform 20. The outer ring wall of the bearing 21 is fixed to the extension platform 20 by screws. The drill rod 22 is installed through the bearing 21. The surface of the drill rod 22 is interference-fitted with the inner ring wall of the bearing 21. The lower end of the drill rod 22 is equipped with a drill bit 23. The end of the drill bit 23 is... The gradient plum blossom structure of the drill bit provides greater stability for drilling into rocks and also offers a certain level of durability. Several mounting heads 24 are distributed at the connection point between the drill rod 22 and the drill bit 23. Any mounting head 24 is welded and fixed to the end surface of the drill rod 22. The mounting head 24 is assembled and fixed to the drill bit 23 by bolts. The drill rod 22 can rotate stably based on the bearing 21 and can be adjusted in height as the lifting platform 17 moves up and down. After the drill rod 22 rotates, it can drive the drill bit 23 to rotate, thereby enabling rock breaking.

[0037] In this embodiment, a protective sleeve 25 is provided on the drill rod 22 near the drill bit 23. The inside of the protective sleeve 25 is slidably fitted with the surface of the drill rod 22. The distance between the protective sleeve 25 and the drill bit 23 is not less than 20cm to avoid affecting the installation and removal of the drill bit 23 and the mounting head 24. Two connecting rods 26 are symmetrically distributed on the upper end of the protective sleeve 25. The two ends of the connecting rods 26 are fixedly installed to the end face of the protective sleeve 25 and the lower end of the extension platform 20, respectively. The two connecting rods 26 can ensure the stability of the installation position of the protective sleeve 25. The protective sleeve 25 can also provide a wrapping and support effect for the end of the drill rod 22, preventing local deformation of the drill rod 22 when the drill bit 23 is drilling into the rock, especially when the length is large. The distance between the farthest ends of the two connecting rods 26 does not exceed the diameter of the drill bit 23, so that the drill rod 22 can move stably when the drill bit 23 is drilling underground.

[0038] The drive mechanism 3 of the present invention includes a side plate 30, a drive shaft 31, a sealing cover 32, a second bearing 33, and a blade 34. The surface of the side plate 30 is fixedly mounted to the lifting platform 17 by a bracket. The upper end of the drill rod 22 is provided with the drive shaft 31, and the connection position between the drive shaft 31 and the drill rod 22 is welded and fixed. Two sealing covers 32 of the same specification are distributed along the vertical position on the surface of the drive shaft 31. The outer ring wall of the sealing cover 32 is fixed to the surface of the side plate 30 by a bracket. A second bearing 33 is provided at the penetration position between the sealing cover 32 and the drive shaft 31. The second bearing 33 is a sealed bearing, and the outer ring wall of the second bearing 33 is sealed to the blade. The connection position of the cover 32 is fixed by welding. The inner ring wall of the bearing 33 is installed with an interference fit to the surface of the drive shaft 31. The surface of the drive shaft 31 is provided with several blades 34. Any blade 34 is fixed to the surface of the drive shaft 31 by welding. The several blades 34 are arranged in a ring at equal intervals along the surface of the drive shaft 31. When the blades 34 are subjected to high pressure liquid impact, they can move quickly and drive the drive shaft 31 to rotate at high speed, so that the drive shaft 31 can drive the drill rod 22 to rotate stably. Finally, the drill bit 23 can have sufficient drilling force to drill through the rock.

[0039] In addition, a high-pressure water pump 301 is also provided on one side of the side plate 30. The outer wall of the high-pressure water pump 301 is fixedly installed on the surface of the side plate 30 by a bracket. The outlet flange of the high-pressure water pump 301 is equipped with a diversion interface 302. The surface of any sealing cover 32 is respectively provided with an inlet interface 35 and an outlet interface 36. The inlet interface 35 and the outlet interface 36 are respectively fixed to the connection position of the sealing cover 32 by welding. The diversion end of the diversion interface 302 is respectively connected to the flange of the corresponding inlet interface 35. High-pressure liquid can be transported by a single high-pressure water pump 301, and the blades 34 can be driven by two sealing covers 32 that can be transported synchronously through the diversion interface 302.

[0040] To further explain the above embodiments, the present invention also provides a method for using an integrated high-pressure drilling rig for supercritical CO2 jet rock breaking, comprising the following steps:

[0041] S1: After the motor 16 is powered on, its internal shaft drives the threaded column 14 to rotate through the coupling. The threaded column 14 and the threaded cylinder 18 fixed to the lifting platform 17 form a threaded pair, thereby driving the lifting platform 17 to move up and down.

[0042] S2: Drilling mechanism 2 and drive mechanism 3 are raised and lowered synchronously with the lifting platform 17 to the designated position. The supercritical CO2 fluid is pressurized by the high-pressure water pump 301 and distributed to the water inlet 35 of the two sealing covers 32 through the diversion interface 302. The impact of the ring-shaped blades 34 rotates, thereby driving the drive shaft 31 to rotate at high speed.

[0043] S3: The drive shaft 31 drives the drill rod 22 and drill bit 23 to rotate synchronously to achieve the rock breaking function;

[0044] S4: Finally, the hydraulic cylinder 101 pushes the piston rod to extend, so that the extrusion block 102 presses tightly against the surface of the side platform 10, forming a friction lock on the lifting platform 17.

[0045] Specifically, in this embodiment, the lifting mechanism 1 drives the threaded column 14 to rotate forward and backward via the motor 16, thereby achieving precise height adjustment of the lifting platform 17. After the motor 16 is powered on, its internal shaft drives the threaded column 14 to rotate via the coupling. The threaded column 14 and the threaded cylinder 18 fixed to the lifting platform 17 form a threaded pair. Since the lifting platform 17 is slidably engaged on the surface of the side platform 10, it is constrained by multi-face contact and cannot rotate on its own, but can only move vertically. Side plate 11 and side plate 2 12 provide stable support for the upper and lower ends of the threaded column 14 through the rod sleeve 15 and the rod seat 13, respectively, to ensure smooth transmission. After the lifting platform 17 reaches the target position, the hydraulic cylinder 101 pushes the piston rod to extend, causing the pressing block 102 to press tightly against the surface of the side platform 10, forming a friction lock to prevent the lifting platform 17 from accidentally displacing during operation. The drilling mechanism 2 achieves rock breaking through the drill rod 22 and drill bit 23, and enhances structural rigidity through the protective sleeve 25 and connecting rod 26. The drill rod 22 is mounted on the extension platform 20 through bearing 21, and can rotate freely and rise and fall as a whole with the lifting platform 17. The drill bit 23 adopts a gradient quincunx structure design, which is bolted to the drill rod 22 through the mounting head 24, making it easy to replace and impact resistant. The protective sleeve 25 is slidably fitted on the lower part of the drill rod 22 and fixed to the lower end of the extension platform 20 by two symmetrically distributed connecting rods 26, forming a cantilever support structure, which effectively suppresses the bending vibration caused by the excessive length-to-diameter ratio of the drill rod 22. Especially when the drill bit 23 cuts into the rock layer, the protective sleeve 25 reduces the risk of bending deformation of the drill rod 22 through distributed constraints. The drive mechanism 3 uses supercritical CO2 fluid to drive the blades 34 to rotate, providing high-speed torque to the drill rod 22. The high-pressure water pump 301 pressurizes the fluid and distributes it to the inlet ports 35 of the two sealing covers 32 through the diversion port 302. The fluid impacts the annularly distributed blades 34, which are welded to the surface of the drive shaft 31. Driven by the kinetic energy of the fluid, the drive shaft 31 rotates at high speed, and then drives the drill rod 22 and drill bit 23 to rotate through the welded connection. The sealing cover 32 is dynamically sealed with the drive shaft 31 through the bearing 33, which not only ensures the rotational freedom of the shaft system, but also prevents high-pressure leakage. The outlet port 36 discharges the fluid after work to the circulation system.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated high-pressure drilling rig for supercritical CO2 jet rock breaking, characterized in that, The system includes a lifting mechanism (1), a drilling mechanism (2) on one side of the lifting mechanism (1), and a drive mechanism (3) connected to the drilling mechanism (2) on the lifting mechanism (1); the lifting mechanism (1) includes a side platform (10), a first side plate (11), a second side plate (12), a threaded column (14), and a lifting platform (17), the lifting platform (17) being slidably engaged with the surface of the side platform (10); the first side plate (11) is welded and fixed to the upper end of one side of the side platform (10), and the second side plate (12) is welded and fixed to the side platform. (10) At the lower end of one side, a rod seat (13) is provided at the upper end of the second side plate (12), and a threaded column (14) is rotatably provided inside the rod seat (13); a rod sleeve (15) is provided through the inside of the first side plate (11), and the surface of the threaded column (14) is rotatably sleeved with the inside of the rod sleeve (15). A motor (16) is provided at the upper end of the threaded column (14), and a rotating shaft for driving is provided inside the motor (16). The end of the rotating shaft and the threaded column (14) are connected by a coupling for fixed transmission. The drilling mechanism (2) includes an extension platform (20), a bearing (21), a drill rod (22), and a drill bit (23). One end of the extension platform (20) is connected to the lifting platform (17), and the bearing (21) is horizontally installed at the other end of the extension platform (20). The drill rod (22) is installed inside the bearing (21), and the drill bit (23) is installed at the lower end of the drill rod (22). Several mounting heads (24) are distributed at the connection position between the drill bit (23) and the drill rod (22). An installation head (24) is welded and fixed to the end surface of the drill rod (22), and the installation head (24) is assembled and fixed to the drill bit (23) by bolts; a protective sleeve (25) is provided on the drill rod (22) near the drill bit (23), the inside of the protective sleeve (25) is slidably sleeved with the surface of the drill rod (22), and two connecting rods (26) are symmetrically distributed on the upper end of the protective sleeve (25), and the two ends of the connecting rods (26) are fixedly installed to the end face of the protective sleeve (25) and the lower end of the extension platform (20) respectively; The drive mechanism (3) includes a side plate (30), a drive shaft (31), a sealing cover (32), a bearing (33), and blades (34). The surface of the side plate (30) is fixedly installed on the lifting platform (17) by a bracket. The drive shaft (31) is welded and fixed at the connection position with the drill rod (22). The surface of the drive shaft (31) has two sealing covers (32) of the same specifications distributed along the upper and lower positions. The outer ring wall of the sealing cover (32) is fixed to the surface of the side plate (30) by a bracket. The sealing cover (32) and the drive shaft (31) are both provided with bearings (33) at the through position. The surface of the drive shaft (31) is provided with several blades (34). Any blade (34) is fixed to the surface of the drive shaft (31) by welding.

2. The integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in claim 1, characterized in that: The connection between the rod seat (13) and the side plate (12) is fixed by screws, the connection between the rod sleeve (15) and the threaded column (14) is fixed by screws, the outer wall of the motor (16) is fixed to the upper end of the side platform (10) by a bracket, and a forward and reverse switch of model HY2-8 is connected to the motor (16) to control the forward and reverse rotation of the motor (16).

3. The integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in claim 1, characterized in that: The lifting platform (17) has a threaded cylinder (18) running through its interior. The connection between the threaded cylinder (18) and the lifting platform (17) is fixed by screws. The interior of the threaded cylinder (18) and the surface of the threaded column (14) are threaded through each other. The threaded cylinder (18) moves by rotating the threaded column (14) in both directions.

4. An integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in claim 1, characterized in that: Several traction sleeves (19) are distributed on the side of the side platform (10) away from the threaded column (14). The outer ring wall of the traction sleeve (19) is fixedly installed to the side platform (10) by a bracket. The traction sleeves (19) are arranged at equal intervals along the vertical position. The traction sleeves (19) and the lifting platform (17) are staggered. The traction sleeves (19) can be installed with a locomotive with a mechanical arm. By adjusting the mechanical arm, the traction sleeves (19) can move part of the side platform (10) or adjust the angle.

5. An integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in claim 1, characterized in that: The lifting platform (17) has symmetrical notches on the side away from the threaded column (14), and a hydraulic cylinder (101) is installed through the inside of the notch. The connection between the hydraulic cylinder (101) and the lifting platform (17) is fixed by screws. The hydraulic cylinder (101) has a piston rod for extension and retraction inside, and a pressing block (102) is fixedly installed at the end of the piston rod. The end of the pressing block (102) away from the hydraulic cylinder (101) is closely attached to the surface of the side platform (10). When the lifting platform (17) moves to any height, the piston rod of the hydraulic cylinder (101) extends, so that the pressing block (102) can press and position the side platform (10).

6. An integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in claim 1, characterized in that: The extension platform (20) is an L-shaped structure. The connection between the extension platform (20) and the outer ring wall of the bearing (21) is fixed by screws. The surface of the drill rod (22) is interference-fitted with the inner ring wall of the bearing (21). The end of the drill bit (23) is a gradient plum blossom structure. The distance between the protective sleeve (25) and the drill bit (23) is not less than 20cm. The distance between the farthest ends of the two connecting rods (26) does not exceed the diameter width of the drill bit (23).

7. An integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in claim 1, characterized in that: The bearing 2 (33) is a sealed bearing. The outer ring wall of the bearing 2 (33) is fixed to the sealing cover (32) by welding. The inner ring wall of the bearing 2 (33) is installed with an interference fit to the surface of the drive shaft (31). Several blades (34) are arranged in a ring at equal intervals along the surface of the drive shaft (31). When the blades (34) are impacted by high pressure liquid, they move quickly and drive the drive shaft (31) to rotate at high speed. The drive shaft (31) drives the drill rod (22) and drill bit (23) to rotate synchronously.

8. An integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in claim 7, characterized in that: A high-pressure water pump (301) is also provided on one side of the side plate (30). The outer wall of the high-pressure water pump (301) is fixedly installed on the surface of the side plate (30) by a bracket. A diversion port (302) is installed on the outlet flange of the high-pressure water pump (301). An inlet port (35) and an outlet port (36) are respectively provided on the surface of any sealing cover (32). The inlet port (35) and the outlet port (36) are respectively fixed to the connection position of the sealing cover (32) by welding. The diversion end of the diversion port (302) is respectively connected to the flange of the corresponding inlet port (35). High-pressure liquid is transported by a single high-pressure water pump (301) and synchronously transported to the two sealing covers (32) through the diversion port (302) for driving the blades (34).

9. A method of using an integrated high-pressure drilling rig for supercritical CO2 jet rock breaking as described in any one of claims 1-8, characterized in that: Includes the following steps: S1: After the motor (16) is powered on, its internal shaft drives the threaded column (14) to rotate through the coupling. The threaded column (14) and the threaded cylinder (18) fixed on the lifting platform (17) form a threaded pair, thereby driving the lifting platform (17) to move up and down. S2: Drilling mechanism (2) and drive mechanism (3) are raised and lowered synchronously to the designated position with the lifting platform (17). The supercritical CO2 fluid is pressurized by the high-pressure water pump (301) and distributed to the water inlet 35 of the two sealing covers 32 through the diversion interface 302. The impact of the ring-shaped blades (34) rotates, thereby driving the drive shaft (31) to rotate at high speed. S3: The drive shaft (31) drives the drill rod (22) and drill bit (23) to rotate synchronously to achieve the rock breaking function; S4: Finally, the hydraulic cylinder (101) pushes the piston rod to extend, so that the extrusion block (102) presses tightly against the surface of the side platform (10), forming a friction lock on the lifting platform (17).

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