Drilling column vortex motion simulation experiment device

Abstract

The invention discloses a drilling column vortex motion simulation experiment device which comprises a mounting structure, a rotating structure and an elastic structure. The rotating structure comprises a rotating part, a clamping part and a driving part, the rotating part is rotationally mounted on the mounting structure, the clamping part is mounted on the rotating part and used for clamping a drill column, and the driving part is connected with the rotating part and used for driving the rotating part to rotate; the elastic structure is mounted on the mounting structure, is spaced from the rotating part in the axial direction of the rotating part, can elastically stretch out and draw back along the rotating axis of the rotating part and is used for pressing against the end part of the drill column. According to the scheme, the elastic structure is not prone to being damaged by the drill bit end, the drill bit end is not fixed and restrained and is in the boundary condition of free rotation, the pressed environment of the drill bit end in a well drilling process is truly simulated, the measurement accuracy is improved, frequent replacement of the elastic structure is not needed, repeated tests can be conveniently conducted, and operation is relatively convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of drill string whirling simulation, and in particular to an experimental device for simulating drill string whirling. Background Art

[0002] In oil drilling operations, the whirling behavior of the drill string is a key factor causing drill tool fatigue fracture, wellbore instability, and reduced drilling efficiency. Usually, a drill string simulation device is used to analyze the whirling law of the drill string.

[0003] Publication No. CN103061745A discloses a test device and test method for simulating the mechanical properties of a bottom hole assembly, which can simulate the axial force, lateral force, and rotation angle of the drill bit and simulate the whirling law of the drill string. However, the near-bit end of its drill string directly presses against the pressure rod of the tensile and compressive sensor, and the pressure rod of the tensile and compressive sensor is fixed to the frame through a fastening nut, resulting in a fixed constraint for the near-bit end of the drill string in this patent, which does not conform to the actual free rotation boundary condition. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies, and propose an experimental device for simulating drill string whirling to solve the technical problem that the near-bit end of the drill string in the prior art adopts a fixed constraint and does not conform to the actual free rotation boundary condition.

[0005] To achieve the above technical purpose, the present invention adopts the following technical solutions: The present invention provides an experimental device for simulating drill string whirling, including: An installation structure; A rotating structure, including a rotating part, a clamping part, and a driving part. The rotating part is rotatably installed on the installation structure. The clamping part is installed on the rotating part and is used for clamping the drill string. The driving part is connected to the rotating part and is used to drive the rotating part to rotate; and An elastic structure, installed on the installation structure, spaced apart from the rotating part along its axial direction, and capable of elastically stretching and contracting along the rotation axis of the rotating part, for pressing against the end of the drill string.

[0006] In some embodiments, the elastic structure has a pressing end and an installation end in its elastic stretching and contracting direction. The pressing end and the installation end are arranged in sequence along the direction away from the rotating part. The pressing end is used for pressing against the end of the drill string, and the installation end is installed on the installation structure; The distance between the rotating part and the installation end is adjustable.

[0007] In some embodiments, the installation structure has an adjustment screw hole, which is located on the side of the installation end away from the rotating part and extends along the axial direction of the rotating part; The drill string whirling simulation experimental device further includes an adjusting screw rod which passes through the adjusting screw hole. The mounting end is connected to the adjusting screw rod and is mounted on the mounting structure via the adjusting screw rod.

[0008] In some embodiments, the drill string whirling simulation experimental device further includes a stop seat and a stop nut. The stop seat is mounted on the adjusting screw rod and is located on the side of the adjusting screw hole close to the rotating part and can axially move relative to the adjusting screw rod. The stop nut is screwed on the adjusting screw rod and is located between the stop seat and the adjusting screw hole; The mounting end presses against the side of the stop seat away from the stop nut.

[0009] In some embodiments, the elastic structure includes a compression spring and a pressing seat. One end of the compression spring is mounted on the mounting structure and elastically expands and contracts along the axial direction of the rotating part. The pressing seat is connected to the end of the compression spring close to the rotating part.

[0010] In some embodiments, an installation groove is provided on the side of the pressing seat close to the compression spring for accommodating the compression spring.

[0011] In some embodiments, the mounting structure has a guiding channel which is located on the side of the elastic structure close to the rotating part and extends along the axial direction of the rotating part for the drill string to pass through.

[0012] In some embodiments, the mounting structure includes a first seat body, a second seat body and a fixing plate. The first seat body and the second seat body are arranged at intervals along the axial direction of the rotating part. The fixing plate is arranged on the side of the second seat body away from the first seat body and encloses a cavity with the second seat body; The rotating part is rotatably mounted on the first seat body. The guiding channel is formed in the second seat body. The elastic structure is mounted in the cavity.

[0013] In some embodiments, the rotating part includes a chuck body rotatably mounted on the mounting structure. The chuck body is axially provided with an avoidance channel for the drill string to pass through; The clamping part includes a clamping driving part and a plurality of chucks. The plurality of chucks are mounted on the chuck body and are arranged at intervals along the circumference of the avoidance channel. Each chuck can extend into and retract from the avoidance channel. The clamping driving part is connected to each chuck for driving the chuck to extend into and retract from the avoidance channel.

[0014] In some embodiments, the drill string vortex simulation experimental device also includes a three-axis acceleration sensor and a full-bridge strain gauge, and the three-axis acceleration sensor and the full-bridge strain gauge are both used to be installed on the drill string.

[0015] Compared with the prior art, in the drill string vortex simulation experimental device provided by the present invention, since the drill string is fixed on the rotating part by the clamping part, and the drill bit end of the drill string is pressed against the elastic structure, the degree of pressure of the drill string on the elastic structure can be adjusted by adjusting the clamping position of the clamping part on the drill string, so as to change the deformation of the elastic structure, so that the elastic structure can meet the strength requirements of the rock block and apply a preset axial pressure to the drill string. At the same time, based on the elastic expansion and contraction characteristics of the elastic structure, the elastic structure is not easily damaged by the drill bit end, and the drill bit end is not fixed and constrained, and can be in a boundary condition of free rotation, which truly simulates the pressure environment of the drill bit end in drilling, improves the measurement accuracy, and does not need to frequently replace the elastic structure, which is convenient for repeatable tests and relatively convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a drill string vortex simulation experimental device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the middle rotating structure, the drill string and the first seat body; Figure 3 yes Figure 1 Schematic diagram of the intermediate elastic structure, drill string, second seat body and fixing plate; Figure 4 yes Figure 3 A cross-sectional view of the middle elastic structure, the drill string, the second seat body and the fixing plate; Figure 5 yes Figure 4 Exploded view of the medium elastic structure, drill string, second seat body and fixed plate; Figure 6 yes Figure 5 Schematic diagram of the elastic structure and the fixing plate; Figure 7 yes Figure 2 Schematic diagram of the rotating part and the clamping part; Figure 8 yes Figure 1 Middle drill string, three-axis acceleration sensor and full-bridge strain gauge.

[0017] Description of reference numerals: 1. Installation structure; 1a. Adjusting screw hole; 1b. Guide channel; 11. First seat body; 12. Second seat body; 13. Fixed plate; 2. Rotating structure; 21. Rotating part; 211. Chuck body; 211a. Avoidance channel; 22. Clamping part; 221. Claw; 23. Driving part; 231. Driving motor; 232. Transmission belt; 3. Elastic structure; 31. Pressing end; 32. Installation end; 33. Compression spring; 34. Pressing seat; 34a. Installation groove; 4. Adjusting screw rod; 41. Limit nut; 5. Stopping seat; 51. Stopping nut; 6. Triaxial acceleration sensor; 7. Full-bridge strain gauge; 8. Drill string. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In order to solve the technical problem in the prior art that the near-bit end of the drill string adopts a fixed constraint, which does not conform to the actual free rotation boundary condition, the present invention provides a drill string vortex motion simulation experiment device, the elastic structure of which is not easily damaged by the bit end, and the bit end is not fixed and constrained, and can be in a free rotation boundary condition, truly simulating the pressure environment of the bit end during drilling, improving the measurement accuracy, and not requiring frequent replacement of the elastic structure, facilitating repeated experiments, and being relatively convenient to operate.

[0020] Please refer to Figures 1 to 3 , Figure 1 , which is a schematic structural diagram of a drill string vortex motion simulation experiment device in an embodiment of the present invention. The drill string vortex motion simulation experiment device includes an installation structure 1, a rotating structure 2 and an elastic structure 3; the rotating structure 2 includes a rotating part 21, a clamping part 22 and a driving part 23. The rotating part 21 is rotatably installed on the installation structure 1, the clamping part 22 is installed on the rotating part 21 for clamping the drill string 8, and the driving part 23 is connected to the rotating part 21 for driving the rotating part 21 to rotate; the elastic structure 3 is installed on the installation structure 1 and is axially spaced from the rotating part 21, and can elastically expand and contract along the rotation axis of the rotating part 21 for pressing against the end of the drill string 8. Specifically, the elastic structure 3 presses against the end of the drill string 8 along its elastic expansion and contraction direction.

[0021] In the drill string vortex simulation experimental device provided by the present invention, since the drill string 8 is fixed on the rotating part 21 by the clamping part 22, and the drill bit end of the drill string 8 is pressed against the elastic structure 3, the clamping position of the clamping part 22 on the drill string 8 can be adjusted to adjust the degree of pressure of the drill string 8 on the elastic structure 3, so as to change the deformation of the elastic structure 3, so that the elastic structure 3 can meet the strength requirements of the rock block and apply a preset axial pressure to the drill string 8. At the same time, based on the elastic expansion and contraction characteristics of the elastic structure 3, the elastic structure 3 is not easily damaged by the drill bit end, and the drill bit end is not fixed and constrained, and can be in a boundary condition of free rotation, which truly simulates the pressure environment of the drill bit end in drilling, improves the measurement accuracy, and does not need to frequently replace the elastic structure 3, and the operation is relatively convenient.

[0022] In one embodiment, see Figure 4 The elastic structure 3 has a pressing end 31 and a mounting end 32 located in the elastic expansion direction thereof. The pressing end 31 and the mounting end 32 are arranged in sequence along a direction away from the rotating part 21. The pressing end 31 is used to press against the end of the drill string 8, and the mounting end 32 is installed on the mounting structure 1; the distance between the rotating part 21 and the mounting end 32 is adjustable.

[0023] In this embodiment, the clamping position of the clamping part 22 on the drill string 8 can be fixed, and the axial pressure of the elastic structure 3 on the drill string 8 can be adjusted to a preset value by adjusting the distance between the mounting end 32 and the rotating part 21, so that it can be applicable to drill strings 8 of more lengths and dimensions, thereby improving versatility.

[0024] It should be noted that the distance between the rotating part 21 and the mounting end 32 is not limited. In one embodiment, the rotating part 21 may be movably arranged relative to the mounting structure 1 and driven by a linear motor or a hydraulic push rod. In another embodiment, the mounting end 32 may be movably arranged relative to the mounting structure 1 and driven by a linear motor or a hydraulic push rod, or in other forms.

[0025] In this embodiment, the rotating portion 21 and the elastic structure 3 are both installed on the ground through the installation structure 1, and the installation structure 1 is fixedly installed on the ground.

[0026] Specifically, the mounting structure 1 has an adjusting screw hole 1a, which is located on the side of the mounting end 32 away from the rotating part 21 and extends axially along the rotating part 21; the drill string vortex simulation experimental device also includes an adjusting screw 4, which is passed through the adjusting screw hole 1a, the mounting end 32 is connected to the adjusting screw 4, and is installed on the mounting structure 1 via the adjusting screw 4.

[0027] In this embodiment, the adjusting screw rod 4 is screwed into the adjusting screw hole 1a, and one end thereof close to the rotating portion 21 is connected to the mounting end 32 of the elastic structure 3, so that the mounting end 32 can be driven to approach and move away from the rotating portion 21 by rotating the adjusting screw rod 4, and the structure is simple and reliable. It should be noted that the adjusting screw rod 4 can be driven to rotate manually or by an adjusting motor, which is not limited herein. In addition, specifically, a limit nut 41 is also screwed on the end of the adjusting screw rod 4 away from the rotating portion 21.

[0028] In one embodiment, please refer to Figure 5 and Figure 6 , the drill string whirling simulation experimental device further includes a stop seat 5 and a stop nut 51. The stop seat 5 is installed on the adjusting screw rod 4 and is located on the side of the adjusting screw hole 1a close to the rotating portion 21, and can move axially relative to the adjusting screw rod 4. The stop nut 51 is screwed on the adjusting screw rod 4 and is located between the stop seat 5 and the adjusting screw hole 1a; the mounting end 32 presses against the side of the stop seat 5 away from the stop nut 51.

[0029] In this embodiment, the mounting end 32 is pressed below the stop seat 5, and it is limited between the drill string 8 and the stop seat 5 by the elastic force of the elastic structure 3. In this way, on the one hand, the distance between the stop seat 5 and the rotating portion 21 can be adjusted by adjusting the position of the stop nut 51, so as to adjust the distance between the mounting end 32 and the rotating portion 21, making the adjustment of the distance between the mounting end 32 and the rotating portion 21 more flexible. On the other hand, since the mounting end 32 only presses against the stop seat 5, when the elastic structure 3 needs to be replaced, as long as it is necessary to move away from the stop seat 5 or loosen the adjusting screw rod 4, the elastic structure 3 can be disengaged from between the stop seat 5 and the drill string 8, and the operation is simple and convenient.

[0030] Specifically, in this solution, a slot is provided on the side of the stop seat 5 close to the elastic structure 3, and the mounting end 32 of the elastic structure 3 is placed in the slot of the stop seat 5.

[0031] It should be noted that the setting form of the elastic structure 3 is not limited, as long as it can elastically expand and contract along the axial direction of the rotating portion 21. In one embodiment, the elastic structure 3 is set as an air spring; in another embodiment, the elastic structure 3 is set as a wave spring; or other forms.

[0032] In one embodiment, the elastic structure 3 includes a compression spring 33 and a pressing seat 34. One end of the compression spring 33 is installed on the mounting structure 1 and elastically expands and contracts along the axial direction of the rotating portion 21, and the pressing seat 34 is connected to one end of the compression spring 33 close to the rotating portion 21.

[0033] In this embodiment, the drill bit end of the drill string 8, the pressing seat 34, the compression spring 33, and the stopping seat 5 are pressed against each other in sequence. The compression spring 33 is sleeved on the outer periphery of the adjusting screw rod 4. The assembly is relatively convenient, and the axial deformation amount of the compression spring 33 is relatively large, which can meet the adjustment requirements and has a relatively low cost. In addition, the axial pressure of the compression spring 33 on the drill bit end is transmitted through the pressing seat 34, making the force on the end of the drill string 8 more uniform.

[0034] In addition, it should be noted that in this embodiment, a sponge pad is provided on the side of the pressing seat 34 close to the rotating part 21 to play a role in reducing vibration. In addition, a sponge sleeve is sleeved on the near-bit end of the drill string 8. Specifically, the length of the sponge sleeve is usually set to about 300 millimeters, so as to be able to cover the near-bit end of the drill string 8 through the sponge sleeve, further playing a role in vibration reduction.

[0035] In one of the embodiments, an installation groove 34a is provided on the side of the pressing seat 34 close to the compression spring 33, and the installation groove 34a is used to accommodate the compression spring 33.

[0036] In this embodiment, an installation groove 34a is also provided on the pressing seat 34, and the compression spring 33 can be clamped in the installation groove 34a of the pressing seat 34 and the groove position of the stopping seat 5, so that the three will not easily come off, further improving the assembly convenience.

[0037] In one of the embodiments, the installation structure 1 has a guiding channel 1b. The guiding channel 1b is located on the side of the elastic structure 3 close to the rotating part 21 and extends along the axial direction of the rotating part 21 for the drill string 8 to pass through.

[0038] In this embodiment, a guiding channel 1b is also provided on the installation structure 1, and the guiding channel 1b plays a certain guiding role for the drill bit end of the drill string 8. It should be noted that in this solution, the inner diameter of the guiding channel 1b is larger than the outer diameter of the drill string 8, so as to facilitate simulating the collision between the drill string 8 and the wellbore wall and realizing the simulation of the real working condition.

[0039] In addition, in this embodiment, the pressing seat 34 presses against one end of the guiding channel 1b close to the compression spring 33. In this way, the pressing seat 34 can be always pressed against the above-mentioned end of the guiding channel 1b, and the end of the drill string 8 is elastically pressed against the pressing seat 34, so that while ensuring that the elastic structure 3 provides sufficient axial pressure to the drill string 8, it can also effectively prevent the elastic structure 3 from accidentally detaching from the installation structure 1 during the experiment.

[0040] It should be noted that the installation structure 1 can be set as a frame, or the foundation of the experimental site, or an experimental platform, or other forms.

[0041] In one embodiment, the mounting structure 1 includes a first base body 11, a second base body 12, and a fixing plate 13. The first base body 11 and the second base body 12 are arranged at intervals along the axial direction of the rotating part 21. The fixing plate 13 is disposed on the side of the second base body 12 away from the first base body 11, and a cavity is formed by surrounding the second base body 12. The rotating part 21 is rotatably mounted on the first base body 11. The guiding channel 1b is formed in the second base body 12, and the elastic structure 3 is mounted in the cavity.

[0042] In this embodiment, placing the elastic structure 3 in the cavity surrounded by the second base body 12 and the fixing plate 13 can play a certain role in isolating the elastic structure 3, avoiding accidental detachment of the elastic structure 3 and causing personal injury, and the structure is simple and the cost is low. It should be noted that in this solution, the two opposite sides of the above cavity are open to facilitate the replacement of the elastic structure 3. In addition, the adjusting screw hole 1a is formed in the fixing plate 13, and the guiding channel 1b is formed in the second base body 12. The fixing plate 13 and the second base body 12 are fixedly connected by bolts. Furthermore, the above first base body 11 and the second base body 12 can be fixedly spaced on the frame at the same time, or can be fixedly spaced on the foundation of the factory building at the same time, or fixed by other means.

[0043] It should be noted that the rotating part 21 can be set in the form of a rotating shaft, or can be set in the form of a turntable, or can be in other forms, as long as it can be rotatably mounted on the mounting structure 1. The clamping part 22 can be set as two clamping plates. Each clamping plate is recessed with a clamping groove, and the two are driven by corresponding driving mechanisms to approach and separate; the clamping part 22 can also be set in the form of a clamping manipulator, or in other forms.

[0044] In one embodiment, please refer to Figure 7 , the rotating part 21 includes a chuck body 211 rotatably mounted on the mounting structure 1. The chuck body 211 is provided with an avoidance channel 211a for the drill string 8 to pass through along its axial direction. The clamping part 22 includes a clamping driving part and a plurality of jaws 221. The plurality of jaws 221 are mounted on the chuck body 211 and are arranged at intervals along the circumference of the avoidance channel 211a. Each jaw 221 can extend into and retract from the avoidance channel 211a. The clamping driving part is connected to each jaw 221 and is used to drive the jaw 221 to extend into and retract from the avoidance channel 211a.

[0045] In this embodiment, the rotating part 21 is set as the chuck body 211, and the clamping part 22 is set in the form of a chuck jaw 221, so that the rotating part 21 and the clamping part 22 are combined into the structure of a multi-jaw chuck. At the same time, an avoidance channel 211a is penetrated through the chuck body 211, which can flexibly adjust the extending length of the drill string 8. While ensuring the rotational stability and the clamping stability of the drill string 8, it can also be applicable to drill strings 8 of more lengths and diameters, and has good versatility. Specifically, in this solution, there are three groups of chuck jaws 221. It should be noted that the driving form of the multi-jaw chuck is a prior art and will not be elaborated here.

[0046] In one embodiment, please refer to Figure 8 , the drill string whirling simulation experimental device further includes a triaxial acceleration sensor 6 and a full-bridge strain gauge 7. Both the triaxial acceleration sensor 6 and the full-bridge strain gauge 7 are used to be installed on the drill string 8.

[0047] In this embodiment, the full-bridge strain gauge 7 is fixed on the drill string 8 by glue. The triaxial acceleration sensor 6 is installed on the right side of the full-bridge strain gauge 7. Parameters such as the drilling pressure, bending degree, torque and strain of the drill string 8 are measured through the full-bridge strain gauge 7, and parameters such as the acceleration, angular velocity and angle of the drill string 8 are measured through the triaxial acceleration sensor 6, and communicate with the computer through Bluetooth. The specific structures and principles of the triaxial acceleration sensor 6 and the full-bridge strain gauge 7 are prior arts and will not be elaborated here.

[0048] In addition, it should be noted that the driving form of the rotating part 21 can be directly driven by a driving motor 231, or the driving motor 231 can drive through a reduction gear, or other forms. Specifically, in this solution, the rotating part 21 is driven by the driving motor 231 and a transmission belt 232. The driving motor 231 is a brushless DC motor. That is, the driving part 23 includes the driving motor 231 and the transmission belt 232.

[0049] For a better understanding of the present invention, the following will be combined with Figures 1 to 8 to elaborate on the technical solution of the present invention in detail: In this solution, the measurement system of the drill string whirling simulation experimental device is mainly composed of a triaxial acceleration sensor 6 and a full-bridge strain gauge 7. Among them, the triaxial acceleration sensor 6 is used to measure parameters such as the acceleration, angular velocity and angle of the drill string 8, and the full-bridge strain gauge 7 is used to measure parameters such as the drilling pressure, bending degree, torque and strain of the drill string 8.

[0050] In addition to the three-axis angular velocity sensor and the full-bridge strain gauge 7, the device also includes an electric three-jaw chuck, a hanging spring shock absorber, etc. It should be noted that a specific embodiment of the combination of the rotating part 21 and the clamping part 22 is an electric three-jaw chuck, and its function is to fix the drill string 8 and provide a rotational speed for the drill string 8. And a specific embodiment of the elastic structure 3 is a hanging spring shock absorber, and its function is to provide a drilling pressure for the drill string 8 to bend the drill string 8.

[0051] Specifically, the electric three-jaw chuck is fixed on the ground through the first seat body 11, and the hanging spring shock absorber is installed between the second seat body 12 and the fixing plate 13 and fixed on the ground through the second seat body 12 and the fixing plate 13, and is placed horizontally. And during the experiment, pressure is applied to the compression spring 33 by adjusting the screw rod 4 to push the pressing seat 34 to move and provide an axial pressure for the drill string 8.

[0052] When the device works, the rotation adjusting screw rod 4 compresses the compression spring 33 to bend the drill string 8, and then the brushless DC motor is started. The electric three-jaw chuck provides a rotational speed for the simulated drill string 8 through the brushless DC motor to make it rotate. The acceleration, angular velocity, angle, drilling pressure, bending degree, torque, strain and other parameters at the key positions of the drill string 8 are measured by the three-axis acceleration sensor 6 and the full-bridge strain gauge 7 for relevant analysis. The measurement results can be fed back on the computer, and the analysis results can be used to study the whirling law of the drill string 8.

[0053] The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A drill string whirling simulation experimental device, characterized in that, Comprising: An installation structure; A rotating structure, including a rotating part, a clamping part and a driving part. The rotating part is rotatably installed on the installation structure. The clamping part is installed on the rotating part and is used for clamping the drill string. The driving part is connected to the rotating part and is used for driving the rotating part to rotate; And An elastic structure, installed on the installation structure and capable of elastically expanding and contracting along the rotation axis of the rotating part, for pressing against the end of the drill string.

2. The drill string whirling simulation experimental device according to claim 1, wherein The elastic structure has a pressing end and an installation end in its elastic expansion and contraction direction. The pressing end and the installation end are arranged in sequence along the direction away from the rotating part. The pressing end is used for pressing against the end of the drill string, and the installation end is installed on the installation structure; The distance between the rotating part and the installation end is adjustable.

3. The drill string whirling simulation experimental device according to claim 2, characterized in that The installation structure has an adjusting screw hole, which is located on the side of the installation end away from the rotating part and extends along the axial direction of the rotating part; The drill string whirling simulation experiment device further includes an adjusting lead screw, which is inserted into the adjusting screw hole. The installation end is connected to the adjusting lead screw and is installed on the installation structure via the adjusting lead screw.

4. The drill string whirling simulation experimental device according to claim 3, characterized in that, The drill string whirling simulation experiment device further includes a stop seat and a stop nut. The stop seat is installed on the adjusting lead screw and is located on the side of the adjusting screw hole close to the rotating part and can move axially relative to the adjusting lead screw. The stop nut is screwed on the adjusting lead screw and is located between the stop seat and the adjusting screw hole; The installation end presses against the side of the stop seat away from the stop nut.

5. The drill string whirling simulation experimental device according to claim 1, wherein The elastic structure includes a compression spring and a pressing seat. One end of the compression spring is installed on the installation structure and elastically expands and contracts along the axial direction of the rotating part. The pressing seat is connected to the end of the compression spring close to the rotating part.

6. The drill string whirling simulation experimental device according to claim 5, characterized in that, An installation groove is provided on the side of the pressing seat close to the compression spring for accommodating the compression spring.

7. The drill string whirling simulation experiment device according to claim 1, wherein, The installation structure has a guiding channel, which is located on the side of the elastic structure close to the rotating part and extends along the axial direction of the rotating part for the drill string to pass through.

8. The drill string whirling simulation experimental device according to claim 7, characterized in that, The installation structure includes a first seat body, a second seat body and a fixing plate. The first seat body and the second seat body are arranged at intervals along the axial direction of the rotating part. The fixing plate is arranged on the side of the second seat body away from the first seat body and encloses a cavity with the second seat body; The rotating part is rotatably installed on the first seat body. The guiding channel is formed in the second seat body, and the elastic structure is installed in the cavity.

9. The drill string whirling simulation experimental device according to claim 1, characterized in that The rotating part includes a chuck body rotatably installed on the installation structure. The chuck body is provided with an avoidance channel for the drill string to pass through along its axial direction; The clamping part includes a clamping driving part and a plurality of jaws. The plurality of jaws are installed on the chuck body and are arranged at intervals along the circumference of the avoidance channel. Each jaw can extend into and retract from the avoidance channel. The clamping driving part is connected to each jaw and is used for driving the jaw to extend into and retract from the avoidance channel.

10. The drill string whirling simulation experimental device according to claim 1, wherein The drill string whirling simulation experimental device further includes a triaxial acceleration sensor and a full-bridge strain gauge, and both the triaxial acceleration sensor and the full-bridge strain gauge are used to be installed on the drill string.

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