A torsion pendulum drilling simulation experiment device

Abstract

This invention discloses a torsional drilling simulation experimental device, relating to the field of drilling equipment technology. It includes a top drive mechanism, a derrick structure, a wellbore structure, a positioning component, and drill pipe. The derrick structure is vertically arranged, and the positioning component is detachably connected to the derrick structure. The positioning component includes a first positioning structure and at least two second positioning structures, located at different heights on the derrick structure. The wellbore structure is sequentially inserted through the first positioning structure and each of the second positioning structures. The top of the wellbore structure is fixedly connected to the first positioning structure. By changing the height of the first positioning structure, the well depth variation of the wellbore structure is simulated. By changing the position of each of the second positioning structures in their respective horizontal planes, the changes in the well inclination angle and azimuth angle of the wellbore structure are simulated. This reduces the cost of the torsional drilling simulation experiment and improves the realism and rationality of the wellbore structure simulated by the experimental device.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology, and in particular to a torsional drilling simulation experimental device. Background Technology

[0002] During torsional drilling operations using a drill string torsional motion control system, the torsional drag reduction mechanism and deformation characteristics of the drill string itself are difficult to accurately calculate through theoretical calculations due to the influence of drilling parameters applied from the ground, necessitating visualization studies. Existing torsional drilling experimental setups include an experimental derrick, a drive unit, and a drill string. The experimental derrick typically includes a horizontal derrick, a vertical derrick, and an arc-shaped guide frame for supporting the wellbore. The arc-shaped guide frame is detachably connected to the horizontal and vertical derricks. The drive unit is mounted on the experimental derrick and is used to drive the drill string for torsional drilling.

[0003] When simulating wellbore structures with different depths and inclination angles, different arc-shaped guide frames need to be replaced. Therefore, it is necessary to design and manufacture a variety of arc-shaped guide frames of different specifications, which increases the cost of torsional drilling simulation experiments. Moreover, the jacking system used to change the position of the drive device usually adopts a sliding connection between the slide rail and the horizontal and vertical derricks. The drive device and the arc-shaped guide frame are located in the plane of the horizontal and vertical derricks, which makes it impossible to simulate wellbore structures with different azimuth angles, thus limiting the realism and rationality of the wellbore structure simulated by the experimental device. Summary of the Invention

[0004] The purpose of this invention is to provide a torsional pendulum drilling simulation experimental device to solve the problems existing in the prior art, reduce the cost of torsional pendulum drilling simulation experiments, and improve the realism and rationality of the wellbore structure simulated by the experimental device.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a torsional drilling simulation experimental device, including a top drive mechanism, a derrick structure, a wellbore structure, a positioning component, and a drill pipe. The derrick structure is vertically arranged, and the top drive mechanism is fixedly installed at the top of the derrick structure. The positioning component is detachably connected to the derrick structure and includes a first positioning structure and at least two second positioning structures. The first positioning structure and each of the second positioning structures are located at different heights of the derrick structure, and the height of the first positioning structure is greater than the height of each of the second positioning structures. The wellbore structure is sequentially inserted through the first positioning structure and each of the second positioning structures. The top of the wellbore structure is fixedly connected to the first positioning structure. The position of each of the second positioning structures in its respective horizontal plane can be changed, and the position of the connected wellbore structure can be changed synchronously to form a vertical well section and a directional well section. The top drive mechanism is fixedly connected to the top of the drill pipe to drive the drill pipe to drill within the wellbore structure.

[0006] In some embodiments, a horizontal well support frame is also included, which is arranged along the extension direction of the horizontal pipe section of the well structure. Multiple third positioning structures are arranged on the horizontal well support frame along the extension direction of the horizontal pipe section of the well structure. The horizontal pipe section of the well structure passes through each of the third positioning structures in sequence, and the height and horizontal position of each of the third positioning structures can be changed.

[0007] In some embodiments, the top drive mechanism includes a pressurizing part and a torsion part. The body of the pressurizing part is fixedly connected to the top of the derrick structure. The output end of the pressurizing part is connected to the body of the torsion part. The output end of the torsion part is fixedly connected to the top of the drill pipe. The output end of the pressurizing part enables the torsion part to move vertically, and the output end of the torsion part enables the drill pipe to reciprocate periodically.

[0008] In some embodiments, the top drive mechanism further includes a linear slide and a sliding cavity. The rear sidewall of the sliding cavity is fixedly connected to the top of the derrick structure. Vertical guide grooves are provided on both sidewalls of the sliding cavity. Two lead screws are arranged side by side in the sliding cavity. Each lead screw is rotatably connected to the top and bottom walls of the sliding cavity. The top of each lead screw is drively connected to the output end of the pressurizing part. The rear sidewall of the linear slide is in contact with the front sidewall of the sliding cavity. The torsion part body is fixedly connected to the linear slide. Guide arms are fixedly connected to both sides of the rear sidewall of the linear slide. Each guide arm extends into each guide groove and is threadedly connected to each lead screw in the sliding cavity.

[0009] In some embodiments, the derrick structure includes four frame columns and a multi-layer frame beam assembly. Each layer of the frame beam assembly includes two first frame beams and two second frame beams. The four frame columns are arranged vertically. The two first frame beams are arranged along a first horizontal direction, and the two second frame beams are arranged along a second horizontal direction, which is perpendicular to the first horizontal direction. Each frame column is perpendicularly connected to one end of the first frame beam and one end of the second frame beam of each layer.

[0010] In some embodiments, the first positioning structure includes a horizontally arranged drilling platform plate, which is fixedly connected to a layer of the frame beam assembly by fasteners. A first through hole is provided on the drilling platform plate to simulate a wellhead. The well shaft structure passes through the first through hole and the top end of the well shaft structure is fixedly connected to the first through hole.

[0011] In some embodiments, the second positioning structure includes a horizontally arranged beam-type positioning member and a horizontally arranged block-type positioning member. The beam-type positioning member extends along the second horizontal direction, and its two ends are respectively fixedly connected to two first frame beams belonging to the same layer of the frame beam assembly by fasteners. The position of the beam-type positioning member relative to the two first frame beams along the first horizontal direction is adjustable. A long slot is formed through the middle of the beam-type positioning member. The two ends of the block-type positioning member are fixedly connected to the beam-type positioning member by fasteners. The position of the block-type positioning member relative to the beam-type positioning member along the second horizontal direction is adjustable. A second through hole is formed in the middle of the block-type positioning member. The second through hole communicates with the long slot. The well shaft structure passes through the second through hole and the long slot in sequence.

[0012] In some embodiments, the pressurizing part includes a first drive mechanism and a first torque sensor. The body of the first drive mechanism is fixedly connected to the top end of the sliding cavity, the output shaft of the first drive mechanism is fixedly connected to one end of the first torque sensor, and the other end of the first torque sensor is drivenly connected to the top end of the lead screw.

[0013] In some embodiments, the torsion section includes a second drive mechanism and a second torque sensor. The body of the second drive mechanism is fixedly mounted on the linear slide. The output shaft of the second drive mechanism is fixedly connected to one end of the second torque sensor, and the other end of the second torque sensor is fixedly connected to the top end of the drill rod.

[0014] In some embodiments, the torsional drilling simulation experimental device further includes an electronic control system, which is signal-connected to the first drive mechanism, the first torque sensor, the second drive mechanism, and the second torque sensor.

[0015] The present invention achieves the following technical effects compared to the prior art: This invention provides a torsional drilling simulation experimental device. It detachably connects a first positioning structure and second positioning structures at different heights on a derrick structure, with the height of the first positioning structure being greater than the height of each of the second positioning structures. The top of the wellbore structure is fixedly connected to the first positioning structure, and the wellbore structure is inserted through each of the second positioning structures. The second positioning structures guide the trajectory of the vertical and directional sections of the wellbore structure. By changing the height of the first positioning structure, the well depth variation of the wellbore structure is simulated. By changing the position of each second positioning structure in its respective horizontal plane, the changes in the inclination angle and azimuth angle of the wellbore structure are simulated. This eliminates the need to design multiple arc-shaped guide frames of different specifications, reducing the cost of torsional drilling simulation experiments and improving the realism and rationality of the wellbore structure simulated by the experimental device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the torsion drilling simulation experimental device in some embodiments of the present invention; Figure 2 for Figure 1 Enlarged view of region A in the middle; Figure 3 for Figure 1 Enlarged view of region B in the middle; Figure 4 This is a schematic diagram of the first frame structure in some embodiments of the present invention; Figure 5 This is a schematic diagram of the second frame structure in some embodiments of the present invention; Figure 6 This is a schematic diagram of the connection of the electronic control system in some embodiments of the present invention.

[0018] In the diagram: 1-Top drive mechanism; 11-Pressure section; 111-First drive mechanism; 112-First torque sensor; 113-First frame; 12-Torsion section; 121-Second drive mechanism; 122-Second torque sensor; 123-Second frame; 13-Linear slide; 131-Guide arm; 14-Sliding cavity; 141-Guide groove; 142-Photoelectric sensor; 2-Derrick structure; 21-Frame column; 22-Frame beam assembly; 221-First frame beam; 222-Second frame beam; 3-Wellbore structure; 4-Positioning assembly; 41-First positioning structure; 411-Drilling platform plate; 42-Second positioning structure; 421-Beam-type positioning component; 422-Block-type positioning component; 5-Drill pipe; 6-Horizontal wellbore support frame; 61-Support column; 62-Support beam; 63-Support plate; 64-Bottomhole pressure sensor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a torsional pendulum drilling simulation experimental device to solve the problems existing in the prior art, reduce the cost of torsional pendulum drilling simulation experiments, and improve the realism and rationality of the wellbore structure simulated by the experimental device.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] This invention provides a torsional drilling simulation experimental device, such as... Figures 1-5As shown, the system includes a top drive mechanism 1, a derrick structure 2, a wellbore structure 3, a positioning assembly 4, and a drill pipe 5. The derrick structure 2 extends vertically. The top drive mechanism 1 is fixedly mounted on the top of the derrick structure 2. The positioning assembly 4 is detachably connected to the derrick structure 2. The positioning assembly 4 includes a first positioning structure 41 and at least two second positioning structures 42. The first positioning structure 41 and each of the second positioning structures 42 are located at different heights of the derrick structure 2, and the height of the first positioning structure 41 is greater than the height of each of the second positioning structures 42. The wellbore structure 3 is sequentially inserted through the first positioning structure 41 and each of the second positioning structures 42. The top of the wellbore structure 3 is fixedly connected to the first positioning structure 41. The position of each of the second positioning structures 42 in its respective horizontal plane can be changed, and the position of the connected wellbore structure 3 can be changed synchronously to form a vertical well section and a directional well section. The top drive mechanism 1 is fixedly connected to the top of the drill pipe 5 to drive the drill pipe 5 to drill inside the wellbore structure 3. By detachably connecting the first positioning structure 41 and the second positioning structure 42 at different heights on the derrick structure 2, with the height of the first positioning structure 41 being greater than the height of each of the second positioning structures 42, the top of the wellbore structure 3 is fixedly connected to the first positioning structure 41, and the wellbore structure 3 is inserted through each of the second positioning structures 42. Thus, the trajectory of the vertical section and the directional section of the wellbore structure 3 is guided by the second positioning structure 42. By changing the height of the first positioning structure 41, the well depth change of the wellbore structure 3 is simulated. By changing the position of each of the second positioning structures 42 in their respective horizontal planes, the change of the well inclination angle and the change of the azimuth angle of the wellbore structure 3 are simulated. There is no need to design multiple arc-shaped guide frames of different specifications, which reduces the cost of the torsional drilling simulation experiment and improves the realism and rationality of the wellbore structure 3 simulated by the experimental device.

[0023] It should be noted that existing experimental derricks typically use sliding rails to connect the jacking system for changing the position of the drive unit to the horizontal and vertical derricks. The drive unit and the arc-shaped guide frame are located in the plane of the horizontal and vertical derricks, and the trajectory of the well shaft structure 3 can only be a two-dimensional curve in the plane. However, this application uses the first positioning structure 41 and the second positioning structure 42 to form multiple guide points, thereby guiding the trajectory of the well shaft structure 3. When it is necessary to change the trajectory of the well shaft structure 3, it is only necessary to change the position of each of the second positioning structures 42 on their respective horizontal planes. Moreover, the position of each of the second positioning structures 42 on the horizontal plane along the mutually perpendicular first and second horizontal directions can be changed, thereby simulating a well shaft structure 3 with a three-dimensional curve trajectory, breaking through the limitation that the well shaft structure 3 is a two-dimensional curve. Specifically, the well shaft structure 3 is a hollow cylindrical flexible structure to simulate the inner wall of the well shaft during drilling operations, allowing the drill pipe 5 to drill inward.

[0024] In some embodiments, the torsional drilling simulation experimental device further includes a horizontal wellbore support frame 6, which is arranged along the extension direction of the horizontal pipe section of the wellbore structure 3. Multiple third positioning structures are arranged on the horizontal wellbore support frame 6 along the extension direction of the horizontal pipe section of the wellbore structure 3. The horizontal pipe section of the wellbore structure 3 is sequentially inserted into each of the third positioning structures, and the height and horizontal position of each third positioning structure can be changed. By changing the height of each third positioning structure, the vertical depth change of the horizontal pipe section of the wellbore structure 3 is simulated; by changing the horizontal position of each third positioning structure, the azimuth angle change of the horizontal pipe section of the wellbore structure 3 is simulated.

[0025] In some embodiments, the top drive mechanism 1 includes a pressurizing section 11 and a torsion section 12. The body of the pressurizing section 11 is fixedly connected to the top of the derrick structure 2. The output end of the pressurizing section 11 is connected to the body of the torsion section 12, and the output end of the torsion section 12 is fixedly connected to the top of the drill pipe 5. The output end of the pressurizing section 11 enables the torsion section 12 to move vertically, and the output end of the torsion section 12 drives the drill pipe 5 to periodically reciprocate. By applying downward pressure to the drill pipe 5 through the pressurizing section 11, the drill pipe 5 is driven to move axially along the wellbore structure 3. By rotating the torsion section 12 in both directions, the drill pipe 5 is periodically reciprocated at small angles, thereby realizing torsional drilling operations.

[0026] In some embodiments, the top drive mechanism 1 further includes a linear slide 13 and a sliding cavity 14. The rear sidewall of the sliding cavity 14 is fixedly connected to the top of the derrick structure 2. Vertical guide grooves 141 are provided on the two side walls of the sliding cavity 14. Two lead screws are arranged side by side in the sliding cavity 14. Each lead screw is rotatably connected to the top and bottom walls of the sliding cavity 14. The top of each lead screw is drivenly connected to the output end of the pressurizing part 11. The rear sidewall of the linear slide 13 is in contact with the front sidewall of the sliding cavity 14. The body of the torsion part 12 is fixedly connected to the linear slide 13. Guide arms 131 are fixedly connected to both sides of the rear sidewall of the linear slide 13. Each guide arm 131 extends into each guide groove 141 and is threadedly connected to each lead screw in the sliding cavity 14. The output end of the pressurizing unit 11 drives the lead screw located in the sliding cavity 14 to rotate, thereby causing the linear slide 13 to move up and down under the limitation of the front side wall of the sliding cavity 14 and the guide groove 141. This, in turn, drives the torsion unit 12 to move up and down through the pressurizing unit 11, thus causing the drill rod 5 to move upwards or applying downward pressure to the drill rod 5. By setting up the sliding cavity 14 and opening vertical guide grooves 141 on both side walls of the sliding cavity 14, the lead screw is placed inside the sliding cavity 14, and the guide wall of the linear slide 13 extends through the guide grooves 141 into the sliding cavity 14 and is threadedly connected to the lead screw. The relatively enclosed structure of the sliding cavity 14 prevents dust or debris from entering the transmission components during the test, avoiding jamming in the torsion drilling simulation experimental device and forcing a shutdown for maintenance. This improves the long-term operational stability of the torsion drilling simulation experimental device and makes it suitable for high-frequency use. Specifically, "front" refers to the orientation direction of the horizontal pipe section of the wellbore structure 3. Figure 1 The "back" side of the well support frame 6 is the opposite of the "front" side.

[0027] In some embodiments, a photoelectric sensor 142 is provided on the outer wall of the sliding cavity 14, and the position of the linear slide 13 can be determined by the photoelectric sensor 142.

[0028] In some embodiments, the derrick structure 2 includes four frame columns 21 and multi-layer frame beam assemblies 22. Each layer of frame beam assembly 22 includes two first frame beams 221 and two second frame beams 222. The four frame columns 21 are vertically arranged, the two first frame beams 221 are arranged along a first horizontal direction, and the two second frame beams 222 are arranged along a second horizontal direction, which is perpendicular to the first horizontal direction. Each frame column 21 is perpendicularly connected to one end of the first frame beam 221 and one end of the second frame beam 222 of each layer, to form a derrick structure 2 whose strength and stability meet the requirements of torsional drilling simulation experiments. In some embodiments, the derrick structure 2 uses aluminum alloy profiles to reduce its weight.

[0029] In some embodiments, the first positioning structure 41 includes a horizontally arranged drilling platform plate 411, which is fixedly connected to a first-layer frame beam assembly 22 by fasteners. A first through hole is provided on the drilling platform plate 411 to simulate a wellhead. The well shaft structure 3 passes through the first through hole and the top of the well shaft structure 3 is fixedly connected to the first through hole. By changing the height of the frame beam assembly 22 where the drilling platform plate 411 is located, the vertical distance between the drilling platform plate 411 and the horizontal well shaft support frame 6 is changed to simulate the well depth change of the well shaft structure 3.

[0030] In some embodiments, the second positioning structure 42 includes a horizontally arranged beam positioning member 421 and a horizontally arranged block positioning member 422. The beam positioning member 421 extends along a second horizontal direction, and its two ends are respectively fixedly connected to two first frame beams 221 belonging to the same layer of frame beam assembly 22 by fasteners. The position of the beam positioning member 421 relative to the two first frame beams 221 along the first horizontal direction is adjustable. A long slot is provided through the middle of the beam positioning member 421. The two ends of the block positioning member 422 are fixedly connected to the beam positioning member 421 by fasteners. The position of the block positioning member 422 relative to the beam positioning member 421 along the second horizontal direction is adjustable. A second through hole is provided in the middle of the block positioning member 422. The second through hole communicates with the long slot. The shaft structure 3 passes through the second through hole and the long slot in sequence. When the top drive mechanism 1 is fixedly mounted on a second frame beam 222 extending along the second horizontal direction, the change of the well inclination angle of the wellbore structure 3 can be simulated by changing the position of the beam positioning component 421 in the first horizontal direction, and the change of the azimuth angle of the wellbore structure 3 can be simulated by changing the position of the block positioning component 422 in the second horizontal direction. Each time the azimuth angle of the wellbore structure 3 needs to be changed, the position of each beam positioning component 421 and each block positioning component 422 can be adjusted by the staff on the derrick structure 2. There is no need to design multiple arc-shaped guide frames of different specifications, which reduces the cost of the torsional drilling simulation experiment and expands the applicable range of the torsional drilling simulation experiment device.

[0031] In some embodiments, the beam positioning component 421 is connected to two first frame beams 221 belonging to the same layer of frame beam assembly 22 via a first linear motion drive mechanism, and the block positioning component 422 is connected to the beam positioning component 421 via a second linear motion drive mechanism. The first linear motion drive structure and the second linear motion drive mechanism enable automated change of the azimuth angle of the well shaft structure 3, eliminating the need for personnel to climb the well frame structure 2 and improving the safety of the experimental process.

[0032] In some embodiments, the horizontal wellbore support frame 6 includes support columns 61, support beams 62, and support plates 63. The support columns 61 are arranged in pairs at intervals along the extension direction of the horizontal pipe section of the wellbore structure 3, and each support column 61 is vertically arranged. The support beams 62 are arranged along the first horizontal direction and the second horizontal direction. Each support beam 62 is vertically connected to the support columns 61 at both ends. The support plates 63 can be horizontally fixed on the support beams 62 or horizontally fixed on the support columns 61. When horizontally fixed on the support columns 61, the support plates 63 are detachably connected to the support columns 61 by fasteners to facilitate adjustment of the height of the support plates 63. A third positioning structure can be detachably connected to each support plate 63. The height and horizontal position of each third positioning structure can be changed. By changing the height of each support plate 63, the vertical depth change of the horizontal pipe section of the wellbore structure 3 is simulated. By changing the horizontal position of each third positioning structure on the corresponding support plate 63, the azimuth angle change of the horizontal pipe section of the wellbore structure 3 is simulated.

[0033] In some embodiments, the pressurizing part 11 includes a first drive mechanism 111 and a first torque sensor 112. The body of the first drive mechanism 111 is fixedly connected to the top end of the sliding cavity 14. The output shaft of the first drive mechanism 111 is fixedly connected to one end of the first torque sensor 112. The other end of the first torque sensor 112 is drivenly connected to the top end of the lead screw, thereby driving the lead screw to rotate around the axis, so that the linear slide 13 can move up and down under the limitation of the front side wall of the sliding cavity 14 and the guide groove 141.

[0034] In some embodiments, the torsion section 12 includes a second drive mechanism 121 and a second torque sensor 122. The body of the second drive mechanism 121 is fixedly mounted on the linear slide 13. The output shaft of the second drive mechanism 121 is fixedly connected to one end of the second torque sensor 122, and the other end of the second torque sensor 122 is fixedly connected to the top end of the drill pipe 5. By rotating the second drive structure in both directions, the drill pipe 5 is periodically torsionally rotated at a small angle, thereby realizing the torsion drilling operation.

[0035] In some embodiments, the pressurizing part 11 further includes a first frame 113, which is fixedly mounted on the top of the sliding cavity 14. The body of the first drive mechanism 111 and the first torque sensor 112 are both fixedly mounted on the first frame 113. The torsion part 12 further includes a second frame 123, which is fixedly mounted on the front sidewall of the linear slide 13. The body of the second drive mechanism 121 and the second torque sensor 122 are both fixedly mounted on the second frame 123. In some embodiments, a reducer and a first coupling are provided between the output shaft of the first drive mechanism 111 and the first torque sensor 112, and a second coupling is provided between the output shaft of the second drive mechanism 121 and the second torque sensor 122. The first drive mechanism 111 is a drive motor, and the second drive mechanism is a rotary motor.

[0036] In some embodiments, a bottom hole pressure sensor 64 is provided at the end of the horizontal well support frame 6 away from the derrick structure 2, and the bottom end of the drill pipe 5 abuts against the bottom hole pressure sensor 64, and the drilling pressure of the drill pipe 5 is measured by the bottom hole pressure sensor 64.

[0037] In some embodiments, the torsional drilling simulation experimental apparatus also includes an electrical control system, such as... Figure 6 As shown, the electronic control system is signal-connected to the first drive mechanism 111, the first torque sensor 112, the second drive mechanism 121, the second torque sensor 122, the bottom hole pressure sensor 64, and the photoelectric sensor 142. The first torque sensor 112 collects the torque of the first drive mechanism 111 to determine the downforce provided by its output. The second torque sensor 122 collects the torque of the second drive mechanism 121 to determine the torque provided by its output. The bottom hole pressure sensor 64 determines the drilling pressure value of the drill pipe 5. Through the human-machine interface, the system precisely controls the rotation speed, rotation angle, and rotation direction of the first and second drive mechanisms 111 and 121, and controls the cycle and number of reciprocating twists of the second drive mechanism 121. The position information of the linear slide 13 collected by the photoelectric sensor 142 limits the travel of the linear slide 13, preventing slippage.

[0038] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A torsion pendulum drilling simulation experimental device, characterized in that: The system includes a top drive mechanism, a derrick structure, a wellbore structure, a positioning assembly, and a drill pipe. The derrick structure is vertically arranged, and the top drive mechanism is fixedly mounted on the top of the derrick structure. The positioning assembly is detachably connected to the derrick structure and includes a first positioning structure and at least two second positioning structures. The first positioning structure and each of the second positioning structures are located at different heights of the derrick structure, and the height of the first positioning structure is greater than the height of each of the second positioning structures. The wellbore structure passes sequentially through the first positioning structure and each of the second positioning structures. The top of the wellbore structure is fixedly connected to the first positioning structure. The position of each of the second positioning structures in its respective horizontal plane can be changed, and the position of the connected wellbore structure can be changed synchronously to form a vertical well section and a directional well section. The top drive mechanism is fixedly connected to the top of the drill pipe to drive the drill pipe to drill within the wellbore structure.

2. The torsional drilling simulation experimental device according to claim 1, characterized in that: It also includes a horizontal well support frame, which is arranged along the extension direction of the horizontal pipe section of the well structure. Multiple third positioning structures are arranged on the horizontal well support frame along the extension direction of the horizontal pipe section of the well structure. The horizontal pipe section of the well structure passes through each of the third positioning structures in sequence, and the height and horizontal position of each of the third positioning structures can be changed.

3. The torsional drilling simulation experimental device according to claim 1, characterized in that: The top drive mechanism includes a pressurizing part and a torsion part. The body of the pressurizing part is fixedly connected to the top of the derrick structure. The output end of the pressurizing part is connected to the body of the torsion part. The output end of the torsion part is fixedly connected to the top of the drill pipe. The output end of the pressurizing part enables the torsion part to move vertically, and the output end of the torsion part enables the drill pipe to reciprocate periodically.

4. The torsional drilling simulation experimental device according to claim 3, characterized in that: The top drive mechanism further includes a linear slide and a sliding cavity. The rear sidewall of the sliding cavity is fixedly connected to the top of the derrick structure. Vertical guide grooves are provided on both sidewalls of the sliding cavity. Two lead screws are arranged side by side in the sliding cavity. Each lead screw is rotatably connected to the top and bottom walls of the sliding cavity. The top of each lead screw is drivenly connected to the output end of the pressurizing part. The rear sidewall of the linear slide is in contact with the front sidewall of the sliding cavity. The torsion part body is fixedly connected to the linear slide. Guide arms are fixedly connected to both sides of the rear sidewall of the linear slide. Each guide arm extends into the guide groove and is threadedly connected to the lead screw in the sliding cavity.

5. The torsional drilling simulation experimental device according to claim 1, characterized in that: The derrick structure includes four frame columns and multi-layer frame beam assemblies. Each layer of the frame beam assembly includes two first frame beams and two second frame beams. The four frame columns are arranged vertically. The two first frame beams are arranged along a first horizontal direction, and the two second frame beams are arranged along a second horizontal direction. The second horizontal direction is perpendicular to the first horizontal direction. Each frame column is perpendicularly connected to one end of the first frame beam and one end of the second frame beam of each layer.

6. The torsional drilling simulation experimental device according to claim 5, characterized in that: The first positioning structure includes a horizontally arranged drilling platform plate, which is fixedly connected to the first layer of the frame beam assembly by fasteners. A first through hole is provided on the drilling platform plate to simulate a wellhead. The well shaft structure passes through the first through hole and the top end of the well shaft structure is fixedly connected to the first through hole.

7. The torsional drilling simulation experimental device according to claim 5, characterized in that: The second positioning structure includes a horizontally arranged beam-type positioning component and a horizontally arranged block-type positioning component. The beam-type positioning component extends along the second horizontal direction. Both ends of the beam-type positioning component are fixedly connected to two first frame beams belonging to the same layer of the frame beam assembly by fasteners. The position of the beam-type positioning component relative to the two first frame beams along the first horizontal direction is adjustable. A long slot is formed through the middle of the beam-type positioning component. Both ends of the block-type positioning component are fixedly connected to the beam-type positioning component by fasteners. The position of the block-type positioning component relative to the beam-type positioning component along the second horizontal direction is adjustable. A second through hole is formed in the middle of the block-type positioning component. The second through hole communicates with the long slot. The well shaft structure passes through the second through hole and the long slot in sequence.

8. The torsional drilling simulation experimental device according to claim 4, characterized in that: The pressurizing part includes a first driving mechanism and a first torque sensor. The body of the first driving mechanism is fixedly connected to the top end of the sliding cavity. The output shaft of the first driving mechanism is fixedly connected to one end of the first torque sensor. The other end of the first torque sensor is drivenly connected to the top end of the lead screw.

9. The torsional drilling simulation experimental device according to claim 8, characterized in that: The torsion section includes a second drive mechanism and a second torque sensor. The body of the second drive mechanism is fixedly mounted on the linear slide. The output shaft of the second drive mechanism is fixedly connected to one end of the second torque sensor, and the other end of the second torque sensor is fixedly connected to the top end of the drill rod.

10. The torsional drilling simulation experimental device according to claim 9, characterized in that: The torsion drilling simulation experimental device also includes an electronic control system, which is signal-connected to the first drive mechanism, the first torque sensor, the second drive mechanism, and the second torque sensor.

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