Rock breaking drilling simulation experiment bench of drilling tool system

Abstract

The invention belongs to a drilling operation tool, and particularly relates to a rock breaking drilling simulation experiment bench of a drilling tool system. The rock breaking drilling simulation experiment bench of the drilling tool system is mainly composed of a main frame, a bottom frame, a hydraulic cylinder, a power module, a vibration measurement module and a bit pressure-torque measurement module. A certain drilling tool combination can be selected to perform a drilling experiment on a certain rock, a single-drill-bit rock breaking or / and while-drilling reaming rock breaking drilling operation experiment can be realized, and drilling pressure, rotating speed, torque and drilling tool and drill bit vibration and motion trail parameters are acquired in a multi-point manner; the experiment bench is provided with a hydraulic lifting device, so that conditions of a horizontal well, a vertical well, an inclined well and the like can be simulated. According to the invention, different drilling operation modes such as simulation of a horizontal well, a vertical well and different types of boreholes with different inclination angles, single-drill-bit drilling and reaming while drilling can be realized, the universality of the experiment bench is improved, and diversified and perfect experiment conditions are provided for related research.

Description

Technical Field

[0001] The present invention relates to a test bench for simulating drilling operations, in particular to a simulation test bench for rock-breaking drilling of a drill string system, and belongs to the field of drilling operation tools. Background Art

[0002] During the drilling process, the lateral vibration of the drill string is the main factor leading to problems such as drill string wear and fatigue failure, which is likely to cause serious downhole accidents and threaten the safety of drilling operations. Scholars at home and abroad have carried out a large number of studies on the vibration characteristics of the drill string. Through theoretical calculations, numerical simulations, and actual measurements, etc., the lateral, longitudinal, and torsional vibrations of the drill string have been analyzed, and many research results with practical guiding significance have been obtained. At present, some scholars study the working state of the drill tool during operation by building a test bench, but basically they only simulate horizontal wells or inclined wells at a certain angle, and do not have universality. Therefore, inventing a simulation test bench for rock-breaking drilling of a drill string system can realize different drilling operation modes such as simulating horizontal wells, vertical wells, and different types of wellbores with different inclination angles, single-bit drilling, and under-reaming drilling, improving the universality of the test bench and providing diverse and perfect experimental conditions for related research. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems and provide a test bench that can adjust the inclination angle of the simulated well according to actual needs, meet single-bit drilling and under-reaming drilling, and simulate the proportion of different drill string combinations near the bit.

[0004] The technical solution adopted by the present invention is as follows: A simulation test bench for rock-breaking drilling of a drill string system, characterized in that: it can conduct simulation experiments on a drill string combination used for actual rock drilling, can realize simulation experiments of single-bit drilling and under-reaming drilling, and can also collect parameters such as weight on bit, rotational speed, torque, and vibrations in the three-axis directions of the drill pipe and near the bit; the simulation rock drilling test bench is provided with a hydraulic lifting device, which can simulate situations such as horizontal wells, vertical wells, and inclined wells; The main frame of the simulation test bench for rock-breaking drilling of the drill string system is composed of a main frame, a base frame, a hydraulic cylinder, and a No. 1 slide rail. The base frame is fixed on the ground, the main frame and the base frame are hinged, the hydraulic cylinder is connected between the main frame and the base frame, and under the push of the hydraulic cylinder, the main frame can be flipped from the horizontal state to the vertical state and maintained. A power module, a vibration detection module, a weight-on-bit - torque measurement module, several casing clamping frames, etc. are installed on the main frame, and 2 No. 1 slide rails are provided; The power module is composed of a pneumatic cylinder, a servo motor, a reducer, a grating ruler, a drilling pressure support seat, a cylinder base, a No. 2 slide rail, and a mobile base, wherein the cylinder base and the grating ruler are installed on the main frame, wherein the pneumatic cylinder and the No. 2 slide rail are installed on the cylinder base, and two No. 2 slide rails are provided, wherein the servo motor, the reducer and the drilling pressure support seat are installed on the upper part of the mobile base, the mobile base is installed on the No. 2 slide rail, and the pneumatic cylinder push rod is connected to the bottom of the mobile base; The vibration collection module is composed of a vibration detection mounting frame, an X-axis vibration detection instrument, a Y-axis vibration detection instrument, a Z-axis vibration detection instrument, a radial clamping fork, a No. 3 slide rail, and a vibration marking tool, wherein the No. 3 slide rail and the Z-axis vibration detection instrument are mounted on the vibration detection mounting frame, two No. 3 slide rails are provided, and the X-axis vibration detection instrument and the Y-axis vibration detection instrument are respectively mounted on the corresponding No. 3 slide rails, wherein the vibration detection mounting frame is mounted on the main frame, and there are two radial clamping forks, each of which is mounted on the corresponding No. 3 slide rail; The drilling pressure-torque measurement module is composed of a rock sample mounting seat, a torque sensor, a torque test frame, an S-type pressure sensor, a No. 3 slide rail and a compression-torsion test platform, wherein the No. 4 slide rail is connected to the compression-torsion test platform, two No. 4 slide rails are provided, the torque test frame is connected to the No. 4 slide rail and can move on the No. 4 slide rail, wherein the S-type pressure sensor is installed between the torque test frame and the compression-torsion test platform, the torque sensor is installed between the rock sample mounting seat and the torque test frame, wherein the compression-torsion test platform is installed on the No. 1 slide rail; The casing support frame can be used to install simulated casing according to actual experimental requirements.

[0005] A further technical solution is a rock-breaking drilling simulation test bench for a drilling tool system, which simulates the rotation speed of rock drilling by controlling the drilling speed of a servo motor, and simulates the application of drilling pressure by controlling the internal pressure value of the pneumatic cylinder. The pneumatic cylinder push rod can push the mobile base to move on the No. 2 slide rail, thereby simulating the drilling process under the condition of applying drilling pressure, and using a grating ruler to monitor the drilling volume in real time; A further technical solution is a rock-breaking drilling simulation test bench for a drilling tool system, wherein there are a total of vibration collection modules, the number of which can be adjusted according to the experimental requirements, the fixed position of the vibration collection module can be adjusted on the main frame according to the experimental requirements, the vibration marking tool is fixed at the position to be detected of the drilling tool and moves with the drilling tool, two radial clamps clamp the cylindrical rod part of the vibration marking tool at 90 degrees, the X-axis vibration detection instrument and the Y-axis vibration detection instrument detect the vibration generated by the corresponding radial clamps, and the Z-axis vibration detection instrument detects the vibration of the disc part of the vibration marking tool; A further technical solution is a simulation test bench for rock-breaking drilling of a drill string system. There are 2 drill pressure-torque measurement modules. One is used during single-bit drilling experiments, and two are used during under-reaming while drilling experiments. The drill pressure-torque measurement modules can be adjusted and fixed at positions on the No. 1 slide rail according to experimental requirements. The experimental torque is collected using a torque sensor, and the drill pressure is measured using an S-type pressure sensor. A further technical solution is a simulation test bench for rock-breaking drilling of a drill string system. The range of the angle that the main frame can be flipped is 0° - 90°. The adjustable range of the rotational speed of the servo motor is 0 - 1500 rpm. The range of the drill pressure that the pneumatic cylinder can provide is 0 - 5000 N. Description of the Drawings

[0006] Figure 1 is a schematic structural diagram of a simulation test bench for rock-breaking drilling of a drill string system according to the present invention; Figure 2 is a schematic external view diagram of a simulation test bench for rock-breaking drilling of a drill string system according to the present invention; Figure 3 is a schematic structural diagram of the vibration measurement module according to the present invention; Figure 4 is a schematic structural diagram of the drill pressure-torque measurement module according to the present invention; In the figure: 1. Main frame, 2. Underframe, 3. Hydraulic cylinder, 4. No. 1 slide rail, 5. Casing clamping frame, 6. Pneumatic cylinder, 7. Servo motor, 8. Reducer, 9. Grating scale, 10. Drill pressure support seat, 11. Cylinder base, 12. No. 2 slide rail, 13. Moving base, 14. Vibration test mounting frame, 15. X-axis vibration detector, 16. Y-axis vibration detector, 17. Z-axis vibration detector, 18. Radial fork, 19. No. 3 slide rail, 20. Vibration marking tool, 21. Rock sample mounting seat, 22. Torque sensor, 23. Torque test stand, 24. S-type pressure sensor, 25. No. 4 slide rail, 26. Pressure-torque test platform. Detailed Embodiments

[0007] The present invention will be further described below with reference to the accompanying drawings.

[0008] As Figures 1-4 shown in the figure, a simulation test bench for rock-breaking drilling of a drill string system, characterized in that: it can conduct simulation experiments on the drill string combinations used in actual rock drilling of a certain type, can realize simulation experiments of single-bit drilling and under-reaming while drilling, and can also collect parameters such as drill pressure, rotational speed, torque, and vibrations in the three-axis directions of the drill pipe and near the bit; the simulation rock drilling test bench is provided with a hydraulic lifting device, which can simulate situations such as horizontal wells, vertical wells, and inclined wells; The main frame of the simulation test bench for rock breaking and drilling of the drill string system consists of the main frame 1, the base frame 2, the hydraulic cylinder 3, and the No. 1 slide rail 4. The base frame 2 is fixed on the ground. The main frame 1 and the base frame 2 are hinged. The hydraulic cylinder 3 is connected between the main frame 1 and the base frame 2. Under the push of the hydraulic cylinder 3, the main frame 1 can be flipped from the horizontal state to the vertical state and maintained. The power module, the vibration detection module, the drill pressure - torque measurement module, several casing clamping frames 5, etc. are installed on the main frame 1. There are 2 No. 1 slide rails 4; The power module consists of a pneumatic cylinder 6, a servo motor 7, a reducer 8, a grating scale 9, a drill pressure support seat 10, a cylinder base 11, a No. 2 slide rail 12, and a moving base 13. Among them, the cylinder base 11 and the grating scale 9 are installed on the main frame 1. The pneumatic cylinder 6 and the No. 2 slide rail 12 are installed on the cylinder base 11. There are 2 No. 2 slide rails 12. The servo motor 7, the reducer 8, and the drill pressure support seat 10 are installed on the upper part of the moving base 13. The moving base 13 is installed on the No. 2 slide rail 12. The push rod of the pneumatic cylinder 6 is connected to the bottom of the moving base 13; The vibration acquisition module consists of a vibration detection mounting frame 14, an X - axis vibration detection instrument 15, a Y - axis vibration detection instrument 16, a Z - axis vibration detection instrument 17, a radial clamp 18, a No. 3 slide rail 19, and a vibration marking tool 20. Among them, the No. 3 slide rail 19 and the Z - axis vibration detection instrument 17 are installed on the vibration detection mounting frame 14. There are 2 No. 3 slide rails 19. The X - axis vibration detection instrument 15 and the Y - axis vibration detection instrument 16 are respectively installed on the corresponding No. 3 slide rails 19. The vibration detection mounting frame 14 is installed on the main frame 1. There are 2 radial clamps 18, which are respectively installed on the corresponding No. 3 slide rails 19; The drill pressure - torque measurement module consists of a rock sample mounting seat 21, a torque sensor 22, a torque test stand 23, an S - type pressure sensor 24, a No. 4 slide rail 25, and a pressure - torque test platform 26. Among them, the No. 4 slide rail 25 is connected to the pressure - torque test platform 26. There are 2 No. 4 slide rails 25. The torque test stand 23 is connected to the No. 4 slide rail 25 and can move on the No. 4 slide rail 25. The S - type pressure sensor 24 is installed between the torque test stand 23 and the pressure - torque test platform 26. The torque sensor 22 is installed between the rock sample mounting seat 21 and the torque test stand 23. The pressure - torque test platform 26 is installed on the No. 1 slide rail 4; The described casing clamping frame 5 can install simulated casings according to actual experimental requirements.

[0009] According to claim 1, a simulation test bench for rock breaking and drilling of a drill string system simulates the rotation speed of rock drilling by controlling the drilling speed of the servo motor 7, and simulates the applied drill pressure by controlling the internal pressure value of the pneumatic cylinder 6. The push rod of the pneumatic cylinder 6 can push the moving base 13 to move on the No. 2 slide rail 12, so as to realize the simulation of the drilling process under the condition of applying drill pressure, and use the grating scale 9 to monitor the drilling amount in real time; According to claim 1, a drilling system rock breaking drilling simulation test bench, there are 2 vibration collection modules, the number of which can be adjusted according to the experimental requirements, the vibration collection modules can be adjusted to a fixed position on the main frame 1 according to the experimental requirements, the vibration marking tool 20 is fixed at the position to be detected of the drilling tool and moves with the drilling tool, two radial clamps 18 clamp the cylindrical rod part of the vibration marking tool 20 at 90 degrees, the X-axis vibration detection instrument 15 and the Y-axis vibration detection instrument 16 detect the vibration generated by the corresponding radial clamps 18, and the Z-axis vibration detection instrument 17 detects the vibration of the disc part of the vibration marking tool 20; According to claim 1, a drilling tool system rock breaking drilling simulation test bench, there are two drilling pressure-torque measurement modules, one is used in a single drill bit drilling experiment, and two are used in a while drilling reaming experiment. The drilling pressure-torque measurement module can be adjusted to a fixed position on the No. 1 slide rail according to the experimental requirements, and the torque sensor 22 is used to collect the experimental torque, and the S-type pressure sensor 24 is used to test the drilling pressure; According to claim 1, a drilling tool system rock breaking drilling simulation test bench, the main frame 1 can be flipped in the angle range of 0°-90°, the pneumatic cylinder 6 can provide a drilling pressure range of 0-5000N, and the servo motor 7 can adjust the speed range of 0-1500rpm.

[0010] A method for using a simulated rock-breaking drilling simulation test bench for a drilling tool system, characterized in that it includes the following steps: S1, in the initial state, the main frame 1 is in a horizontal position, ensuring that the equipment is in a power-off state; S2. The experimenter can install and fix the experimental rock sample on the rock sample mounting seat 21 according to the experimental requirements. After the installation is completed, the corresponding drilling pressure-torque measurement module is adjusted to the required position according to the experimental requirements and fixed on the main frame 1; S3. The experimenter starts to install the drill assembly according to the experimental requirements. In this step, the vibration collection module is installed and fixed at the vibration position to be measured. The detailed steps are as follows: first, the vibration marking tool 20 is fixed at the specified position on the drill pipe, and then two radial clamps 18 are used to clamp the cylindrical rod part of the vibration marking tool 20 at 90 degrees, so that the Z-axis vibration detection instrument 17 is in contact with the disc part of the vibration marking tool 20. After the measuring instrument is installed, the part of the vibration collection module connected to the main frame 1 is fixed on the main frame 1; S4. Check the fixing steps mentioned in steps S2 and S4 and clean the installation tools to ensure that there are no loose fixed points and no fixed objects left on the experimental bench; S5, start the power supply, lift the main frame 1 to the required angle according to the experimental requirements, and adjust the drilling pressure value provided by the pneumatic cylinder 6 and the speed of the servo motor 7 according to the experimental requirements; S6. After completing a single experiment, lower the main frame 1 to a horizontal position and collect experimental data; S7. Just repeat steps S2 - S6 according to the actual requirements of subsequent experiments.

Claims

1. A simulation test bench for rock breaking drilling of a drill string system, characterized in that: It is possible to conduct a drilling experiment on a certain type of rock with a certain drill string assembly, which can achieve single-bit rock breaking or coiled tubing drilling and reaming rock breaking operation experiments. Parameters such as drill pressure, rotational speed, torque, and the vibration and movement trajectories of the drill string and bit are collected at multiple points. The simulated rock drilling test bench is equipped with a hydraulic lifting device, which can simulate horizontal wells, vertical wells, and inclined wells with different inclination angles, etc. The main frame of the simulated rock drilling test bench consists of a main frame (1), a base frame (2), a hydraulic cylinder (3), and a No. 1 slide rail (4). Among them, the base frame (2) is fixed on the ground, and the main frame (1) and the base frame (2) are hinged. The hydraulic cylinder (3) is connected between the main frame (1) and the base frame (2). Under the push of the hydraulic cylinder (3), the main frame (1) can be flipped from the horizontal state to the vertical state and maintained. The power module, vibration detection module, drill pressure-torque measurement module, several casing clamping brackets (5), etc. are installed on the main frame (1), and 2 No. 1 slide rails (4) are provided. The power module consists of a pneumatic cylinder (6), a servo motor (7), a reducer (8), a grating scale (9), a drill pressure support seat (10), a cylinder base (11), a No. 2 slide rail (12), and a moving base (13). Among them, the cylinder base (11) and the grating scale (9) are installed on the main frame (1). The pneumatic cylinder (6) and the No. 2 slide rail (12) are installed on the cylinder base (11), and 2 No. 2 slide rails (12) are provided. The servo motor (7), the reducer (8), and the drill pressure support seat (10) are installed on the upper part of the moving base (13), and the moving base (13) is installed on the No. 2 slide rail (12). The push rod of the pneumatic cylinder (6) is connected to the bottom of the moving base (13). The vibration acquisition module consists of a vibration detection mounting frame (14), an X-axis vibration detection instrument (15), a Y-axis vibration detection instrument (16), a Z-axis vibration detection instrument (17), a radial fork (18), a No. 3 slide rail (19), and a vibration marking tool (20). Among them, the No. 3 slide rail (19) and the Z-axis vibration detection instrument (17) are installed on the vibration detection mounting frame (14), and 2 No. 3 slide rails (19) are provided. The X-axis vibration detection instrument (15) and the Y-axis vibration detection instrument (16) are respectively installed on the corresponding No. 3 slide rails (19). The vibration detection mounting frame (14) is installed on the main frame (1). There are 2 radial forks (18), and each is installed on the corresponding No. 3 slide rail (19). The drilling pressure-torque measurement module is composed of a rock sample mounting seat (21), a torque sensor (22), a torque test frame (23), an S-type pressure sensor (24), a No. 4 slide rail (25) and a compression-torsion test platform (26), wherein the No. 4 slide rail (25) is connected to the compression-torsion test platform (26), two No. 4 slide rails (25) are provided, the torque test frame (23) is connected to the No. 4 slide rail (25) and can move on the No. 4 slide rail (25), wherein the S-type pressure sensor (24) is installed between the torque test frame (23) and the compression-torsion test platform (26), the torque sensor (22) is installed between the rock sample mounting seat (21) and the torque test frame (23), and the compression-torsion test platform (26) is installed on the No. 1 slide rail (4); The casing support frame (5) can be used to install a simulated casing according to actual experimental requirements.

2. According to claim 1, a drilling tool system rock breaking drilling simulation test bench, which simulates the rotation speed of rock drilling by controlling the drilling speed of a servo motor (7), simulates the application of drilling pressure by controlling the internal pressure value of the pneumatic cylinder (6), and the push rod of the pneumatic cylinder (6) can push the movable base (13) to move on the No. 2 slide rail (12), thereby simulating the drilling process under the condition of applying drilling pressure, and using a grating ruler (9) to monitor the drilling volume in real time.

3. According to claim 1, a drilling tool system rock breaking drilling simulation test bench, there are two vibration collection modules in total, the number of which can be adjusted according to the experimental requirements, the vibration collection modules can be adjusted to a fixed position on the main frame (1) according to the experimental requirements, the vibration marking tool (20) is fixed at the position to be detected of the drilling tool and moves with the drilling tool, two radial clamps (18) clamp the cylindrical rod part of the vibration marking tool (20) at 90 degrees, the X-axis vibration detection instrument (15) and the Y-axis vibration detection instrument (16) detect the vibration generated by the corresponding radial clamps (18), and the Z-axis vibration detection instrument (17) detects the vibration of the disc part of the vibration marking tool (20).

4. According to claim 1, a drilling tool system rock breaking drilling simulation test bench, there are two drilling pressure-torque measurement modules, one is used in a single drill bit drilling test, and two are used in a while drilling reaming test. The drilling pressure-torque measurement modules can be adjusted to a fixed position on a No. 1 slide rail according to experimental requirements, and a torque sensor (22) is used to collect experimental torque, and an S-type pressure sensor (24) is used to test drilling pressure.

5. According to claim 1, a drilling tool system rock breaking drilling simulation test bench, the main frame (1) can be turned over in the range of 0°-90°, the pneumatic cylinder (6) can provide a drilling pressure in the range of 0-5000N, and the servo motor (7) can adjust the speed in the range of 0-1500rpm.

6. The using steps of a simulation test bench for rock breaking and drilling of a drill string system are characterized in that, The following steps are involved: S1. In the initial state, the main frame (1) is in a horizontal position, ensuring that the equipment is in a power-off state; S2. The experimenter can install and fix the experimental rock sample on the rock sample mounting seat (21) according to the experimental requirements. After the installation is completed, the corresponding drilling pressure-torque measurement module is adjusted to the required position according to the experimental requirements and fixed on the main frame (1); S3. The experimenter starts to install the drill string assembly according to the experimental requirements. In this step, the vibration acquisition module is installed at the vibration position to be measured and fixed. The detailed steps are as follows: first, fix the vibration marking tool (20) at the specified position on the drill pipe, and then clamp the two radial clamping forks (18) at 90° to hold the cylindrical rod part of the vibration marking tool (20). Keep the Z-axis vibration detector (17) in contact with the disc part of the vibration marking tool (20). After the measuring instrument is installed, fix the connection part of the vibration acquisition module to the main frame (1) on the main frame (1). S4. Check the fixing steps mentioned in steps S2 and S4 and clean the installation tools to ensure that there are no points with insecure fixation and no fixed items left on the experimental bench. S5. Turn on the power supply, lift the main frame (1) to the required angle according to the experimental requirements, and adjust the drilling pressure value provided by the pneumatic cylinder (6) and the rotation speed of the servo motor (7) according to the experimental requirements. S6. After completing a single experiment, lower the main frame (1) to the horizontal position and collect the experimental data. S7. Just repeat steps S2 - S6 according to the actual requirements of subsequent experiments.

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