Dynamic visual drilling device for high-temperature high-stress impact rock breaking

Abstract

The invention relates to the technical field of well drilling, in particular to a high-temperature and high-stress impact rock breaking dynamic visualization well drilling device. Comprising a pressure-bearing frame, a movable support is installed in the middle of the pressure-bearing frame, a stress loading assembly is installed on the movable support, a fixed support is fixedly installed on the top of the pressure-bearing frame, a drill rod is installed on the fixed support, and a drill bit is fixedly installed at the bottom of the drill rod. And the drill bit penetrates through the top of the stress loading assembly and is pressed on the rock core sample. The drill bit rock breaking forming device is reasonable and compact in structure and convenient to use, through cooperative use of the stress loading assembly, the axial impact assembly, the axial impact rotating assembly, the drill rod rotating main drive assembly, the circumferential impact assembly and the axial loading assembly, high-temperature and high-stress synchronous loading is achieved under the laboratory condition, the drill bit rock breaking forming device has the advantages of being safe and reliable, and the drill bit rock breaking forming device is suitable for large-scale popularization and application. Operation is facilitated, and reliable theoretical guidance is provided for deep-ground drilling acceleration engineering operation.

Description

Technical Field

[0001] The invention relates to the technical field of drilling, and is a high-temperature and high-stress impact rock-breaking dynamic visualization drilling device. Background Art

[0002] my country's deep and ultra-deep oil and gas and geothermal reserves are among the highest in the world. The deep earth is rich in mineral resources and geothermal energy, and is the successor field with the greatest potential for future onshore energy exploration and development. Drilling is the primary key means of deep energy development. In ultra-high temperature, high stress, and extremely hard deep reservoirs, meeting the needs of safe, efficient, and rapid well completion and building a reliable circulation wellbore channel are the most important engineering links for resource exploration, increasing production, and reducing costs. However, facing the hard formations under the complex coupling environment of temperature and stress, drilling speed and efficiency increase face severe technical challenges. Taking deep and ultra-deep oil and gas and deep hot dry rock drilling projects as an example, the reservoir temperature generally has the characteristics of "high temperature, high stress, high density, and high hardness", which can easily lead to engineering problems such as poor drillability of the drill bit, severe wear of the drill bit teeth, low mechanical drilling speed, long well construction cycle, and high mining cost. Therefore, it is urgent to develop technical means that can effectively solve the efficient crushing of hard rocks under high temperature and high stress conditions to meet the major needs of efficient drilling and production of deep energy.

[0003] At present, there is a continuous exploration of efficient rock breaking technology in complex environments of high temperature and high stress. Although new drilling technical means, such as laser, high-temperature thermal cracking, and electric pulse, have a large number of experimental device foundations, there are still problems such as lack of supporting well site tools, difficulty in operation transmission, complex process flow, and high investment cost. There is still a certain distance from comprehensive market promotion and application. Deep hard rock drilling still uses traditional rotary drilling methods.

[0004] The patent document with the authorization announcement number CN109162640B discloses a laser-water jet combined drilling device, which is mainly composed of a drill pipe, a drill collar, a drill bit, an optical fiber, a clean water pipeline, an optical fiber protection tube, a beam shaping device, a beam shaping device housing, a water-guided laser beam channel, a laser head, and a drill bit flow channel. The drill pipe is provided with an optical fiber protection tube and a clean water pipeline, and the drill collar is provided with a beam shaping device and a beam shaping device housing. The laser head emits a laser, which passes through the beam shaping device. At the same time, the clean water converges in the V-section channel at the center of the drill bit to form a water-guided laser beam that is ejected from the water-guided laser beam channel. The thermal effect of the laser and the cavitation effect of the clean water are used to break the rock. The injection of clean water can prevent rock debris from entering the beam shaping device. The drilling fluid is pressurized by the uphole pump and ejected from the drill bit flow channel to break the rock.

[0005] The patent document with authorization announcement number CN109488206B discloses an explosion shock wave-mechanical drilling rock breaking device, which is mainly composed of a drill pipe, a turbine generator set, an explosive transmission pipe, a conductor, a drill bit, a drilling fluid flow channel, a nozzle, and a short section; the short section is composed of a spring, a baffle, an ignition device, an explosion chamber, a shape memory alloy wall, and a wedge-shaped channel; the explosive and air mixture is detonated in the explosion chamber to generate a shock wave, which is continuously reflected to eventually form a plane shock wave, which causes impact damage to the rock through the nozzle, and the damaged rock is broken under the further action of the drill bit; the shape memory alloy wall adopts a shape memory alloy with superelasticity, which is greatly deformed by the shock wave in the high-temperature austenite state, and automatically recovers after the shock wave weakens, thereby avoiding damage to the short section in the explosion.

[0006] Impact drilling speed-up technology is a drilling method developed on the basis of traditional rotary drilling. It has a mature downhole tool supporting foundation and has significant technical advantages in improving mechanical drilling speed, saving drilling costs and shortening well construction time. It is expected to provide technical ideas for breaking through high temperature and high stress rock breaking speed-up. However, there are relatively few studies on deep-earth hard rock impact rock breaking experiments under high temperature and high stress conditions. The difficulty lies in the lack of a drill bit rock breaking forming device that can achieve high temperature and high stress synchronous loading under laboratory conditions, so it is impossible to provide reliable theoretical guidance for deep-earth drilling speed-up engineering operations. Summary of the invention

[0007] The present invention provides a high-temperature and high-stress impact rock breaking dynamic visualization drilling device, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that there is currently a lack of a drill bit rock breaking and forming device that can achieve high-temperature and high-stress synchronous loading under laboratory conditions, and thus cannot provide reliable theoretical guidance for deep drilling speed-up engineering operations.

[0008] The technical solution of the present invention is achieved through the following measures: a high-temperature and high-stress impact rock-breaking dynamic visualization drilling device, comprising a pressure frame and a stress loading assembly; a movable bracket is installed in the middle of the pressure frame, a stress loading assembly is installed on the movable bracket, a fixed bracket is fixedly installed on the top of the pressure frame, a drill rod is installed on the fixed bracket through a bearing seat, a drill bit is fixedly installed at the bottom of the drill rod, an axial impact assembly is installed on the top of the drill rod through a bearing seat, an axial impact rotating assembly, a drill rod rotating main drive assembly and a circumferential impact assembly are respectively installed on the fixed bracket through the bearing seat, an axial loading assembly is fixedly installed at the lower part of the pressure frame, and the top of the axial loading assembly is fixedly installed together with the movable bracket.

[0009] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned stress loading assembly includes a true three-axis clamp and a cover plate, a cover plate is fixedly installed on the top of the true three-axis clamp, a mounting hole is provided in the middle of the cover plate, a first side plate clamping block is fixedly installed on the outer side of the side plate of the true three-axis clamp, a second side plate clamping block is fixedly installed on the outer side of the first side plate clamping block, a bottom plate clamping block is fixedly installed on the bottom of the true three-axis clamp, the top of the bottom plate clamping block is respectively fixedly installed with the bottom of the first side plate clamping block and the bottom of the second side plate clamping block, a through mounting cavity is provided in the middle of the bottom plate clamping block, an inner lifting piston and an outer lifting piston are sequentially installed from the inside to the outside in the upper part of the mounting cavity, a piston fastening block is fixedly installed in the lower part of the mounting cavity, and the inner lifting piston and the outer lifting piston are pressed against the bottom end surface of the true three-axis clamp through the piston fastening block.

[0010] A limit frame is installed between the side plate and the bottom plate clamping block of the true three-axis clamp, and there is a distance between the limit frame and the outer lifting piston; a pressure plate is fixedly installed between the cover plate and the first side plate clamping block.

[0011] The above-mentioned true three-axis clamp has an oil storage tank, an oil injection pump and a tee on the outside; an oil outlet is provided at the lower part of the oil storage tank, the oil outlet end of the oil storage tank and the oil inlet end of the oil injection pump are connected together by an oil inlet pipe, the oil outlet end of the oil injection pump and the inlet end of the tee are connected together by an oil outlet pipe, a left oil injection hole is provided on the second side plate clamping block on the left, a right oil injection hole is provided on the second side plate clamping block on the right, a first oil injection pipe is connected between the first outlet end of the tee and the left oil injection hole, a second oil injection pipe is connected between the second outlet end of the tee and the right oil injection hole, a lower oil injection hole is provided on the piston fastening block, a third oil injection pipe is connected between the third outlet end of the tee and the lower oil injection hole, and valves are fixedly installed on the first oil injection pipe, the second oil injection pipe and the third oil injection pipe, respectively.

[0012] The above-mentioned true three-axis clamp has a mud tank and a waste liquid recovery barrel on the outside; a liquid outlet is provided at the lower part of the mud tank, and a liquid inlet is provided on the drill pipe. The liquid outlet end of the mud tank and the liquid inlet end of the drill pipe are connected together through a liquid inlet pipe, a mud pump is fixedly installed on the liquid inlet pipe, a liquid accumulation tank is fixedly installed on the movable bracket, a support is fixedly installed between the liquid accumulation tank and the piston fastening block, the liquid accumulation tank is located directly below the piston fastening block, a liquid outlet is provided at the lower part of the liquid accumulation tank, a liquid outlet pipe is fixedly connected to the liquid outlet end of the liquid accumulation tank, and the liquid outlet end of the liquid outlet pipe is located directly above the waste liquid recovery barrel.

[0013] The above-mentioned axial loading assembly includes a hydraulic cylinder, which is fixedly installed at the lower part of the pressure-bearing frame, and a piston that can move up and down is installed in the hydraulic cylinder, a sealed chamber is formed between the piston and the bottom of the hydraulic cylinder, a mounting hole is provided at the top of the hydraulic cylinder, a piston rod is fixedly connected to the top of the piston, and the top of the piston rod passes through the mounting hole of the hydraulic cylinder and is fixedly installed together with a movable bracket, a cylinder oil filling hole connected to the sealed chamber is provided at the bottom of the hydraulic cylinder, a fourth oil filling pipe is connected between the oil outlet pipe and the cylinder oil filling hole, and a valve is fixedly installed on the fourth oil filling pipe; or / and; a displacement sensor and a load sensor are respectively installed in the inner lifting piston, at least one pressure sensor and a temperature sensor are respectively installed in the first side plate clamping block, and a heating element is installed in the side plate of the true three-axis clamp; or / and; a camera and a fill light are respectively fixedly installed on the fixed bracket.

[0014] The above-mentioned drill rod rotation main drive assembly includes a first motor, which is mounted on a fixed bracket through a bearing seat, and a first pulley is fixedly mounted on the power output end of the first motor and on the drill rod at a corresponding position, respectively, and the two first pulleys are connected together by a synchronous belt; or / and; the axial impact assembly includes an impact piece, the lower end of the impact piece and the upper end of the drill rod are mounted together through a bearing seat, and a torque sensor is installed between the impact piece and the drill rod, the axial impact rotation assembly includes a second motor, a mounting frame is fixedly mounted on the fixed bracket, the second motor is mounted on the mounting frame through a bearing seat, and second pulleys are fixedly mounted on the power output shaft of the impact piece and the second motor, respectively, and the two second pulleys are connected together by a synchronous belt; or / and; the circumferential impact assembly includes a third motor, the third motor is mounted on the fixed bracket through a bearing seat, an eccentric wheel is fixedly mounted on the power output end of the third motor, a circumferential impact follower is fixedly mounted on the drill rod at a corresponding position, and the eccentric wheel and the circumferential impact follower are connected together by a connecting rod.

[0015] The present invention has a reasonable and compact structure and is easy to use. Through the coordinated use of a stress loading component, an axial impact component, an axial impact rotating component, a drill pipe rotating main drive component, a circumferential impact component and an axial loading component, a high-temperature and high-stress synchronously loaded drill bit rock breaking and forming device is realized under laboratory conditions. The device has the characteristics of safety and reliability, is convenient to operate, and provides reliable theoretical guidance for deep drilling speed-up engineering operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention in a working state.

[0017] Attached Figure 2 For removable bracket riser attached Figure 1 Schematic diagram of the right view structure.

[0018] Attached Figure 3 For attachment Figure 1 Schematic diagram of the enlarged structure of the medium stress loading component.

[0019] The codes in the attached drawings are: 1 is a pressure frame, 2 is a stress loading assembly, 3 is a movable bracket, 4 is a core sample, 5 is a fixed bracket, 6 is a drill pipe, 7 is a drill bit, 8 is an axial impact assembly, 9 is an axial impact rotation assembly, 10 is a drill pipe rotation main drive assembly, 11 is a circumferential impact assembly, 12 is an axial loading assembly, 13 is a true three-axis clamp, 14 is a cover plate, 15 is a first side plate clamping block, 16 is a second side plate clamping block, 17 is a bottom plate clamping block, 18 is an inner lifting piston, 19 is an outer lifting piston, 20 is a piston fastening block, 21 is a limit frame, 22 is a pressure plate, 23 is an oil storage tank, 24 is an oil injection pump, 25 is a tee, 26 is an oil inlet pipe, 27 is an oil outlet pipe, 28 is a left oil injection hole, 29 is a right oil injection hole, 30 is a first oil injection pipe, 31 is a second oil injection pipe, 32 is a lower oil injection hole, 33 is a third oil injection pipe, 34 is a valve, 35 is a mud tank, 36 is a waste liquid recovery barrel, 37 is a liquid inlet pipe, 38 is a mud pump, 39 is a liquid storage tank, 40 is a support, 41 is a liquid outlet pipe, 42 is a drilling fluid circulation component, 43 is a hydraulic cylinder, 44 is a piston, 45 is a sealing chamber, 46 is a hydraulic cylinder, 47 is a hydraulic cylinder, 48 is a hydraulic cylinder, 49 is a hydraulic cylinder, 50 is a hydraulic cylinder, 51 is a hydraulic cylinder, 52 is a hydraulic cylinder, 53 is a hydraulic cylinder, 54 is a hydraulic cylinder, 55 is a hydraulic cylinder, 56 is a hydraulic cylinder, 57 is a hydraulic cylinder, 58 is a hydraulic cylinder, 59 is a hydraulic cylinder, 60 is a hydraulic cylinder, 61 is a hydraulic cylinder, 62 is a hydraulic cylinder, 63 is a hydraulic cylinder, 64 is a hydraulic cylinder, 65 is a hydraulic cylinder, 66 is a hydraulic cylinder, 67 is a hydraulic cylinder, 68 is a hydraulic cylinder, 69 is a hydraulic cylinder, 70 is a hydraulic cylinder, 71 is a hydraulic cylinder, 72 is a hydraulic cylinder, 73 is a hydraulic cylinder, 74 is a hydraulic cylinder, 75 is a hydraulic cylinder, 76 is a hydraulic cylinder, 77 is a hydraulic cylinder, 78 is a hydraulic cylinder, 79 is a hydraulic cylinder, 80 is a hydraulic cylinder, 81 is a hydraulic cylinder, 82 is a hydraulic cylinder, 83 is a hydraulic cylinder, is the piston rod, 47 is the cylinder oil filling hole, 48 is the fourth oil filling pipe, 49 is the displacement sensor, 50 is the load sensor, 51 is the pressure sensor, 52 is the temperature sensor, 53 is the heating element, 54 is the camera, 55 is the fill light, 56 is the first motor, 57 is the first pulley, 58 is the synchronous belt, 59 is the impact piece, 60 is the torque sensor, 61 is the second motor, 62 is the mounting frame, 63 is the second pulley, 64 is the third motor, 65 is the eccentric wheel, 66 is the circumferential impact follower, and 67 is the connecting rod. DETAILED DESCRIPTION

[0020] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0021] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0022] The present invention will be further described below in conjunction with embodiments and drawings: As attached Figure 1 , 2As shown in Figure 3, the high-temperature and high-stress impact rock-breaking dynamic visualization drilling device includes a pressure frame 1 and a stress loading assembly 2; a movable bracket 3 is installed in the middle of the pressure frame 1, and the stress loading assembly 2 is installed on the movable bracket 3; a fixed bracket 5 is fixedly installed on the top of the pressure frame 1, a drill pipe 6 is installed on the fixed bracket 5 through a bearing seat, a drill bit 7 is fixedly installed at the bottom of the drill pipe 6, an axial impact assembly 8 is installed on the top of the drill pipe 6 through a bearing seat, an axial impact rotating assembly 9, a drill pipe rotating main drive assembly 10 and a circumferential impact assembly 11 are respectively installed on the fixed bracket 5 through the bearing seat, an axial loading assembly 12 is fixedly installed at the lower part of the pressure frame 1, and the top of the axial loading assembly 12 is fixedly installed together with the movable bracket 3. During operation, a core sample 4 is filled in the stress loading component 2, and a drill bit 7 passes through the top of the stress loading component 2 and is pressed against the core sample 4; the drill rod 6 and the drill bit 7 are known and commonly used; the drill bit 7 may be a polycrystalline diamond composite (PDC) drill bit, which is suitable for rock formations with relatively high hardness. The drill bit 7 is used to be placed on the core sample 4 in the stress loading component 2 for drilling, and is provided with a variety of buckle types; the drill rod 6 is provided with a variety of buckle types, and the bottom end is connected to the drill bit 7; the stress loading component 2 is used to apply XYZ triaxial stress to the core sample 4 to simulate the real formation stress field; the stress loading component 2 acts on the core sample 4 to simulate the formation pressure in the actual drilling process, and the circumferential impact component 11 and the axial impact component 8 can be set to simulate the impact loads of different frequencies and different directions applied to the drill bit 7 in the actual drilling process, so as to study the influence of dynamic impact on the crushing of the core sample 4 and provide theoretical guidance for engineering speed-up operations. In this way, the present invention realizes a high-temperature and high-stress synchronously loaded drill bit 7 rock breaking and forming device under laboratory conditions through the coordinated use of the stress loading component 2, the axial impact component 8, the axial impact rotation component 9, the drill pipe rotation main drive component 10, the circumferential impact component 11 and the axial loading component 12. It has the characteristics of safety and reliability, convenient operation, and provides reliable theoretical guidance for deep drilling speed-up engineering operations.

[0023] The above-mentioned high temperature and high stress impact rock breaking dynamic visualization drilling device can be further optimized and / or improved according to actual needs: As attached Figure 1 , 2As shown in FIG. 3 , the stress loading assembly 2 includes a true three-axis clamp 13 and a cover plate 14. The cover plate 14 is fixedly installed on the top of the true three-axis clamp 13. A mounting hole is provided in the middle of the cover plate 14. A first side plate clamping block 15 is fixedly installed on the outer side of the side plate of the true three-axis clamp 13. A second side plate clamping block 16 is fixedly installed on the outer side of the first side plate clamping block 15. A bottom plate clamping block 17 is fixedly installed on the bottom of the true three-axis clamp 13. The bottom plate clamping block 17 The top of the bottom plate clamp block 17 is fixedly mounted with the bottom of the first side plate clamp block 15 and the bottom of the second side plate clamp block 16, respectively. A through-mounting cavity is provided in the middle of the bottom plate clamp block 17. An inner lifting piston 18 and an outer lifting piston 19 are sequentially mounted from the inside to the outside of the upper portion of the mounting cavity. A piston fastening block 20 is fixedly mounted at the lower portion of the mounting cavity. The inner lifting piston 18 and the outer lifting piston 19 are pressed against the bottom end surface of the true triaxial clamp 13 through the piston fastening block 20. During operation, the core sample 4 is filled in the true triaxial clamp 13, and the drill bit 7 is pressed against the core sample 4 through the mounting hole on the cover plate 14; the true triaxial clamp 13 can be a known and commonly used one, and can be composed of four side plates and a bottom plate, and is configured to apply pressure in three mutually perpendicular directions through a loading assembly. The stress loading assembly 2 is configured to apply pressure to the core sample 4 in the true triaxial clamp 13 in three mutually perpendicular directions. In other words, the stress loading assembly 2 can apply pressure in the X direction, the Y direction and the Z direction to the core sample 4, and the X direction, the Y direction and the Z direction are perpendicular to each other.

[0024] As attached Figure 1 , 2 As shown in FIG. 3 , a limit frame 21 is installed between the side plate and the bottom plate clamping block 17 of the true three-axis clamp 13, and there is a gap between the limit frame 21 and the outer lift piston 19; a pressure plate 22 is fixedly installed between the cover plate 14 and the first side plate clamping block 15. The limit frame 21 is used to limit the minimum height of the outer lift piston 19 to prevent the outer lift piston 19 from being too low.

[0025] As attached Figure 2 , 3As shown, an oil storage tank 23, an oil injection pump 24 and a tee 25 are arranged outside the true three-axis clamp 13; an oil outlet is arranged at the lower part of the oil storage tank 23, the oil outlet of the oil storage tank 23 and the oil inlet of the oil injection pump 24 are connected together through an oil inlet pipe 26, the oil outlet of the oil injection pump 24 and the inlet of the tee 25 are connected together through an oil outlet pipe 27, a left oil injection hole 28 is arranged on the second side plate clamping block 16 on the left, and a right oil injection hole 29 is arranged on the second side plate clamping block 16 on the right. The oil hole 29, a first oil injection pipe 30 is connected between the first outlet end of the tee 25 and the left oil injection hole 28, a second oil injection pipe 31 is connected between the second outlet end of the tee 25 and the right oil injection hole 29, a lower oil injection hole 32 is provided on the piston fastening block 20, a third oil injection pipe 33 is connected between the third outlet end of the tee 25 and the lower oil injection hole 32, and valves 34 are fixedly installed on the first oil injection pipe 30, the second oil injection pipe 31 and the third oil injection pipe 33. Through the oil injection pump 24 and the tee 25, the pressure in the first oil injection pipe 30, the second oil injection pipe 31 and the third oil injection pipe 33 can be adjusted separately, thereby adjusting the pressure on the first side plate clamping block 15 and the inner lifting piston 18 on the left and right sides, and completing the adjustment of the pressure in the three directions of X, Y and Z.

[0026] As attached Figure 2 As shown, a mud tank 35 and a waste liquid recovery barrel 36 are provided on the outside of the true three-axis clamp 13; a liquid outlet is provided at the lower part of the mud tank 35, and a liquid inlet is provided on the drill rod 6, the liquid outlet of the mud tank 35 and the liquid inlet of the drill rod 6 are connected together through a liquid inlet pipe 37, a mud pump 38 is fixedly installed on the liquid inlet pipe 37, a liquid storage tank 39 is fixedly installed on the movable bracket 3, a support 40 is fixedly installed between the liquid storage tank 39 and the piston fastening block 20, the liquid storage tank 39 is located directly below the piston fastening block 20, a liquid outlet is provided at the lower part of the liquid storage tank 39, a liquid outlet pipe 41 is fixedly connected to the liquid outlet end of the liquid storage tank 39, and the liquid outlet end of the liquid outlet pipe 41 is located directly above the waste liquid recovery barrel 36. By applying the stress loading component 2 to the core sample 4, the formation pressure in the actual drilling process can be simulated. By setting the drilling fluid circulation component 42, the drilling fluid circulation conditions in the actual drilling process can be simulated. By setting the circumferential impact component 11 and the axial impact component 8, the impact loads of different frequencies and different directions applied to the drill bit 7 in the actual drilling process can be simulated, so as to study the influence of dynamic impact on the crushing of the core sample 4 and provide theoretical guidance for engineering speed-up operations. The mud waste liquid can overflow the stress loading component 2 and then flow into the liquid storage tank 39.

[0027] As attached Figure 1 , 2As shown, the axial loading assembly 12 includes a hydraulic cylinder 43, which is fixedly mounted at the lower part of the pressure frame 1, and a piston 44 that can move up and down is installed in the hydraulic cylinder 43, and a sealed cavity 45 is formed between the piston 44 and the bottom of the hydraulic cylinder 43, and a mounting hole is provided at the top of the hydraulic cylinder 43, and a piston rod 46 is fixedly connected to the top of the piston 44, and the top of the piston rod 46 passes through the mounting hole of the hydraulic cylinder 43 and is fixedly mounted together with the movable bracket 3, and a hydraulic cylinder injection hole connected to the sealed cavity 45 is provided at the bottom of the hydraulic cylinder 43. The oil hole 47, a fourth oil injection pipe 48 is connected between the oil outlet pipe 27 and the cylinder oil injection hole 47, and a valve 34 is fixedly installed on the fourth oil injection pipe 48; or / and; a displacement sensor 49 and a load sensor 50 are respectively installed in the inner lifting piston 18, at least one pressure sensor 51 and a temperature sensor 52 are respectively installed in the first side plate clamping block 15, and a heating element 53 is installed in the side plate of the true three-axis clamp 13; or / and; a camera 54 and a fill light 55 are respectively fixedly installed on the fixed bracket 5. The data acquisition component includes a pressure sensor 51, a load sensor 50 and a displacement sensor 49, etc. The pressure sensor 51 is used to collect pressure, the load sensor 50 is used to collect axial impact force, and the displacement sensor 49 is used to collect the drilling footage of the drill bit 7. The temperature control component includes a heating element 53 for heating and keeping the core sample 4 warm, a temperature sensor 52 for monitoring the core sample 4, and a controller electrically connected to the temperature sensor 52 and the heating element 53. The visualization component includes a camera 54 for shooting the core sample 4, post-processing software for processing the video after shooting, and a fill light 55. The axial loading component 12 is connected to the pressure frame 1 and the movable bracket 3, and is used to drive the movable bracket 3 to rise and fall in the axial direction to adjust the height of the movable bracket 3, thereby providing drilling pressure for the drilling process. It can also include a PLC control component, which is configured to receive measurement data collected by the sensor, receive user instructions, and send control signals according to the measurement data and user instructions. By acting on the core sample 4 through the stress loading component 2, the formation pressure in the actual drilling process can be simulated. By setting the temperature control component, the formation temperature in the actual drilling process can be simulated. By setting the circumferential impact component 11 and the axial impact component 8, the impact loads of different frequencies and different directions on the drill bit 7 in the actual drilling process can be simulated, so as to study the influence of dynamic impact on the crushing of the core sample 4 and provide theoretical guidance for engineering speed-up operations. By adjusting the pressure in the fourth oil injection pipe 48, the lifting and lowering of the piston 44 can be adjusted, and then the lifting and lowering of the movable bracket 3 can be adjusted. An air compressor may also be connected to the fourth oil filling pipe 48 , and the piston 44 may be lifted and lowered by compressed air generated in the air compressor.

[0028] As attached Figure 1 , 2As shown, the drill rod rotation main drive assembly 10 includes a first motor 56, which is mounted on the fixed bracket 5 through a bearing seat, and a first pulley 57 is fixedly mounted on the power output end of the first motor 56 and on the drill rod 6 at the corresponding position, respectively, and the two first pulleys 57 are connected together through a synchronous belt 58; or / and; the axial impact assembly 8 includes an impact piece 59, the lower end of the impact piece 59 and the upper end of the drill rod 6 are mounted together through a bearing seat, and a torque sensor 60 is installed between the impact piece 59 and the drill rod 6, and the axial impact rotation assembly 9 includes a second motor 61, which is fixedly mounted on the fixed bracket 5. The mounting frame 62, the second motor 61 is mounted on the mounting frame 62 through a bearing seat, the second pulley 63 is fixedly mounted on the impact member 59 and the power output shaft of the second motor 61, and the two second pulleys 63 are connected together through a synchronous belt 58; or / and; the circumferential impact assembly 11 includes a third motor 64, the third motor 64 is mounted on the fixed bracket 5 through a bearing seat, an eccentric wheel 65 is fixedly mounted on the power output end of the third motor 64, and a circumferential impact follower 66 is fixedly mounted on the drill rod 6 at the corresponding position, and the eccentric wheel 65 and the circumferential impact follower 66 are connected together through a connecting rod 67. The axial impact assembly 8 is well known and commonly used, and may include an impact member 59, a stationary member, a spring, etc., so as to facilitate the application of impact load to the drill rod 6; the circumferential impact assembly 11 facilitates the application of instantaneous torque to the drill rod 6. The first motor 56, the second motor 61 and the third motor 64 can all be servo motors known in the art; the drill rod rotating main drive assembly 10 is used to provide rock breaking torque for the drill rod 6, and the torque generated by the first motor 56 is transmitted to the drill rod 6 through the two first pulleys 57 and the synchronous belt 58, thereby providing rock breaking torque for the drill bit 7, driving the drill bit 7 to break the core sample 4. The axial impact assembly 8 and the axial impact rotating assembly 9 are used to provide axial impact loads for the drill bit 7, assisting the drill bit 7 in breaking the core sample 4; the torque generated by the second motor 61 is transmitted to the axial impact assembly 8 through the two second pulleys 63 and the synchronous belt 58, causing the impact member 59 to rotate, and the impact member 59 interacts with the stationary member and is transmitted to the drill rod 6 through the spring, thereby providing axial impact for the drill bit 7, assisting the drill bit 7 in breaking the core sample 4. The circumferential impact assembly 11 is used to provide a circumferential impact load for the drill bit 7, assisting the drill bit 7 in crushing the core sample 4; the torque generated by the third motor 64 converts the uniform torque into a periodic impact load through the eccentric mechanism composed of the eccentric wheel 65 and the connecting rod 67 and transmits it to the drill rod 6, thereby providing a circumferential impact for the drill bit 7, assisting the drill bit 7 in crushing the core sample 4. The torque sensor 60 is used to collect torque. The eccentric wheel 65 and the circumferential impact follower 66 are known and commonly used, and the circumferential impact follower 66 can be an annular member.

[0029] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A high-temperature and high-stress impact rock-breaking dynamic visualization drilling device, characterized in that It includes a pressure frame and a stress loading component; a movable bracket is installed in the middle of the pressure frame, a stress loading component is installed on the movable bracket, a fixed bracket is fixedly installed on the top of the pressure frame, a drill rod is installed on the fixed bracket through a bearing seat, a drill bit is fixedly installed on the bottom of the drill rod, an axial impact component is installed on the top of the drill rod through the bearing seat, an axial impact rotating component, a drill rod rotating main drive component and a circumferential impact component are respectively installed on the fixed bracket through the bearing seat, an axial loading component is fixedly installed at the lower part of the pressure frame, and the top of the axial loading component is fixedly installed together with the movable bracket.

2. The high-temperature and high-stress impact rock-breaking dynamic visualization drilling device according to claim 1 is characterized in that The stress loading assembly includes a true three-axis clamp and a cover plate, wherein the cover plate is fixedly installed on the top of the true three-axis clamp, a mounting hole is provided in the middle of the cover plate, a first side plate clamping block is fixedly installed on the outer side of the side plate of the true three-axis clamp, a second side plate clamping block is fixedly installed on the outer side of the first side plate clamping block, a bottom plate clamping block is fixedly installed on the bottom of the true three-axis clamp, the top of the bottom plate clamping block is respectively fixedly installed with the bottom of the first side plate clamping block and the bottom of the second side plate clamping block, a through mounting cavity is provided in the middle of the bottom plate clamping block, an inner lifting piston and an outer lifting piston are sequentially installed from the inside to the outside in the upper part of the mounting cavity, a piston fastening block is fixedly installed in the lower part of the mounting cavity, and the inner lifting piston and the outer lifting piston are pressed against the bottom end surface of the true three-axis clamp through the piston fastening block.

3. The high-temperature and high-stress impact rock-breaking dynamic visualization drilling device according to claim 2 is characterized in that A limit frame is installed between the side plate and the bottom plate clamping block of the true three-axis clamp, and there is a distance between the limit frame and the outer lifting piston; a pressure plate is fixedly installed between the cover plate and the first side plate clamping block.

4. The high-temperature and high-stress impact rock-breaking dynamic visualization drilling device according to claim 2 or 3 is characterized in that An oil storage tank, an oil injection pump and a tee are arranged on the outside of the true three-axis clamp; an oil outlet is arranged at the lower part of the oil storage tank, the oil outlet of the oil storage tank and the oil inlet of the oil injection pump are connected together through an oil inlet pipe, the oil outlet of the oil injection pump and the inlet of the tee are connected together through an oil outlet pipe, a left oil injection hole is arranged on the second side plate clamping block on the left side, a right oil injection hole is arranged on the second side plate clamping block on the right side, a first oil injection pipe is connected between the first outlet end of the tee and the left oil injection hole, a second oil injection pipe is connected between the second outlet end of the tee and the right oil injection hole, a lower oil injection hole is arranged on the piston fastening block, a third oil injection pipe is connected between the third outlet end of the tee and the lower oil injection hole, and valves are fixedly installed on the first oil injection pipe, the second oil injection pipe and the third oil injection pipe, respectively.

5. The high-temperature and high-stress impact rock-breaking dynamic visualization drilling device according to claim 2 or 3 is characterized in that A mud tank and a waste liquid recovery barrel are provided on the outside of the true three-axis clamp; a liquid outlet is provided at the lower part of the mud tank, and a liquid inlet is provided on the drill pipe. The liquid outlet of the mud tank and the liquid inlet of the drill pipe are connected together through a liquid inlet pipe, a mud pump is fixedly installed on the liquid inlet pipe, a liquid accumulation tank is fixedly installed on the movable bracket, a support is fixedly installed between the liquid accumulation tank and the piston fastening block, the liquid accumulation tank is located directly below the piston fastening block, a liquid outlet is provided at the lower part of the liquid accumulation tank, a liquid outlet pipe is fixedly connected to the liquid outlet end of the liquid accumulation tank, and the liquid outlet end of the liquid outlet pipe is located directly above the waste liquid recovery barrel.

6. The high-temperature and high-stress impact rock-breaking dynamic visualization drilling device according to claim 4 is characterized in that A mud tank and a waste liquid recovery barrel are provided on the outside of the true three-axis clamp; a liquid outlet is provided at the lower part of the mud tank, and a liquid inlet is provided on the drill pipe. The liquid outlet of the mud tank and the liquid inlet of the drill pipe are connected together through a liquid inlet pipe, a mud pump is fixedly installed on the liquid inlet pipe, a liquid accumulation tank is fixedly installed on the movable bracket, a support is fixedly installed between the liquid accumulation tank and the piston fastening block, the liquid accumulation tank is located directly below the piston fastening block, a liquid outlet is provided at the lower part of the liquid accumulation tank, a liquid outlet pipe is fixedly connected to the liquid outlet end of the liquid accumulation tank, and the liquid outlet end of the liquid outlet pipe is located directly above the waste liquid recovery barrel.

7. The high-temperature and high-stress impact rock-breaking dynamic visualization drilling device according to claim 2 or 3 is characterized in that The axial loading assembly includes a hydraulic cylinder, which is fixedly installed at the lower part of the pressure-bearing frame. A piston that can move up and down is installed in the hydraulic cylinder, and a sealed chamber is formed between the piston and the bottom of the hydraulic cylinder. A mounting hole is provided at the top of the hydraulic cylinder, and a piston rod is fixedly connected to the top of the piston. The top of the piston rod passes through the mounting hole of the hydraulic cylinder and is fixedly installed together with a movable bracket. A cylinder oil filling hole connected to the sealed chamber is provided at the bottom of the hydraulic cylinder, a fourth oil filling pipe is connected between the oil outlet pipe and the cylinder oil filling hole, and a valve is fixedly installed on the fourth oil filling pipe; or / and; a displacement sensor and a load sensor are respectively installed in the inner lifting piston, at least one pressure sensor and a temperature sensor are respectively installed in the first side plate clamping block, and a heating element is installed in the side plate of the true three-axis clamp; or / and; a camera and a fill light are respectively fixedly installed on the fixed bracket.

8. The high-temperature and high-stress impact rock-breaking dynamic visualization drilling device according to claim 6 is characterized in that The axial loading assembly includes a hydraulic cylinder, which is fixedly installed at the lower part of the pressure-bearing frame. A piston that can move up and down is installed in the hydraulic cylinder, and a sealed chamber is formed between the piston and the bottom of the hydraulic cylinder. A mounting hole is provided at the top of the hydraulic cylinder, and a piston rod is fixedly connected to the top of the piston. The top of the piston rod passes through the mounting hole of the hydraulic cylinder and is fixedly installed together with a movable bracket. A cylinder oil filling hole connected to the sealed chamber is provided at the bottom of the hydraulic cylinder, a fourth oil filling pipe is connected between the oil outlet pipe and the cylinder oil filling hole, and a valve is fixedly installed on the fourth oil filling pipe; or / and; a displacement sensor and a load sensor are respectively installed in the inner lifting piston, at least one pressure sensor and a temperature sensor are respectively installed in the first side plate clamping block, and a heating element is installed in the side plate of the true three-axis clamp; or / and; a camera and a fill light are respectively fixedly installed on the fixed bracket.

9. The high temperature and high stress impact rock breaking dynamic visualization drilling device according to claim 1, 2 or 3, characterized in that The drill rod rotation main drive assembly includes a first motor, which is mounted on a fixed bracket through a bearing seat, and a first pulley is fixedly mounted on the power output end of the first motor and on the drill rod at a corresponding position, respectively, and the two first pulleys are connected together by a synchronous belt; or / and; the axial impact assembly includes an impact piece, the lower end of the impact piece and the upper end of the drill rod are mounted together through a bearing seat, and a torque sensor is installed between the impact piece and the drill rod, the axial impact rotation assembly includes a second motor, a mounting frame is fixedly mounted on the fixed bracket, the second motor is mounted on the mounting frame through a bearing seat, and second pulleys are fixedly mounted on the power output shaft of the impact piece and the second motor, respectively, and the two second pulleys are connected together by a synchronous belt; or / and; the circumferential impact assembly includes a third motor, the third motor is mounted on the fixed bracket through a bearing seat, an eccentric wheel is fixedly mounted on the power output end of the third motor, a circumferential impact follower is fixedly mounted on the drill rod at a corresponding position, and the eccentric wheel and the circumferential impact follower are connected together by a connecting rod.

10. The high temperature and high stress impact rock breaking dynamic visualization drilling device according to claim 8 is characterized in that The drill rod rotation main drive assembly includes a first motor, which is mounted on a fixed bracket through a bearing seat, and a first pulley is fixedly mounted on the power output end of the first motor and on the drill rod at a corresponding position, respectively, and the two first pulleys are connected together by a synchronous belt; or / and; the axial impact assembly includes an impact piece, the lower end of the impact piece and the upper end of the drill rod are mounted together through a bearing seat, and a torque sensor is installed between the impact piece and the drill rod, the axial impact rotation assembly includes a second motor, a mounting frame is fixedly mounted on the fixed bracket, the second motor is mounted on the mounting frame through a bearing seat, and second pulleys are fixedly mounted on the power output shaft of the impact piece and the second motor, respectively, and the two second pulleys are connected together by a synchronous belt; or / and; the circumferential impact assembly includes a third motor, the third motor is mounted on the fixed bracket through a bearing seat, an eccentric wheel is fixedly mounted on the power output end of the third motor, a circumferential impact follower is fixedly mounted on the drill rod at a corresponding position, and the eccentric wheel and the circumferential impact follower are connected together by a connecting rod.

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