Simulation device for rotation state of drill rod and use method of simulation device

Abstract

The invention provides a simulation device for the rotation state of a drill rod and a use method thereof, and the simulation device for the rotation state of the drill rod comprises a limiting part and a drill rod part. A communication channel for simulating the direction in the well is formed in the limiting part; the communication channel is movably arranged so as to adjust the simulated direction in the well; one end of the drill rod part is arranged on one side of the limiting part, and the other end of the drill rod part penetrates through the communicating channel to the other side of the limiting part; the middle part and the end part of the drill rod part can rotate respectively, and the middle part of the drill rod part is of a flexible structure so as to simulate the rotating state of the drill rod in a well. The actual operation state of the drill rod during drilling can be simulated, so that an operator can master the actual operation state of the drill rod before drilling, dangerous situations possibly occurring in the drilling process can be conveniently solved or avoided in time, the occurrence probability of drilling accidents is reduced, and the working efficiency of drilling is greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of drilling test equipment, and specifically relates to a device for simulating the rotation state of drill pipe and its usage method. Background Technology

[0002] During drilling, if the actual operating status of the drill pipe can be known in advance, potential dangers can be addressed or avoided in a timely manner, reducing the probability of drilling accidents and greatly improving drilling efficiency. Therefore, simulating the operating status of the drill pipe in advance is a crucial part of the drilling process.

[0003] Current drill pipe operation simulations generally employ digital modeling, analyzing the stress on the drill pipe at different depths and combining this with rotational speed and torque during operation to predict its actual operating state. However, with the continuous development of drilling operations, drilling depths and drill pipe lengths are gradually increasing. To enable the drill pipe to adapt to high-depth environments, its flexibility needs to be increased accordingly. This increased flexibility leads to inconsistencies, even significant differences, in the rotational speed and torque between the drill bit and the surface. Furthermore, the friction between the drill bit at the bottom layer and within the well causes substantial changes in rotational speed and torque, affecting the drill pipe's rotational speed and torque. Moreover, obtaining detailed stress data on the drill pipe at high depths is difficult, making it challenging to simulate and predict its actual operating state through digital modeling. Testing can only be conducted during actual drilling operations, impacting drilling efficiency and hindering the timely resolution or prevention of potential hazards.

[0004] Therefore, it is difficult to accurately simulate and predict the actual operating state of drill pipes in high-depth environments. Summary of the Invention

[0005] To address the above problems, this invention proposes a device for simulating the rotation state of a drill pipe and a method for using it. The device for simulating the rotation state of a drill pipe includes:

[0006] A limiting section, wherein a connecting channel for simulating the orientation within a well is provided;

[0007] The connecting channel is movable to adjust the simulated wellbore orientation;

[0008] A drill rod portion, one end of which is disposed on one side of the limiting portion, and the other end of which passes through the connecting channel to the other side of the limiting portion;

[0009] The middle and end sections of the drill pipe can rotate separately, and the middle section of the drill pipe is a flexible structure to simulate the rotation state of the drill pipe in the well.

[0010] In some specific embodiments, the limiting part includes:

[0011] A cylindrical body, the interior of which is hollow, such that the inner wall of the cylindrical body encloses the communicating channel;

[0012] The cylinder is slidably mounted on the slide rail to drive the connecting channel to move.

[0013] In some specific embodiments, the cylindrical body has a curved structure;

[0014] The slide rail is also a curved structure adapted to the cylinder.

[0015] In some specific embodiments, the drill pipe section includes:

[0016] A drive assembly is disposed on one side of the limiting portion, and the output end of the drive assembly is rotatable;

[0017] A connecting component, one end of which is connected to the output end of the driving component, and the other end of which passes through the communicating channel to the other side of the limiting part;

[0018] A drill bit assembly is disposed at the end of the connecting assembly away from the driving assembly, and is used to simulate a drill bit.

[0019] In some specific embodiments, the connection component includes:

[0020] A first connector is connected to the output end of the drive assembly for transmission.

[0021] The second connector is connected to the first connector, and the second connector is a flexible structure.

[0022] In some specific embodiments, there are multiple first connectors;

[0023] There are also multiple second connectors;

[0024] The plurality of first connectors and the plurality of second connectors are alternately connected.

[0025] In some specific embodiments, a first resistance motor is provided inside the first connector;

[0026] The first resistance motor can drive the first connecting member to rotate in order to generate torque.

[0027] In some specific embodiments, a second resistance motor is provided within the drill bit assembly;

[0028] The second resistance motor can drive the drill bit assembly to rotate in order to generate torque.

[0029] In some specific embodiments, it also includes:

[0030] A main controller is connected to the middle and end of the drill pipe section, respectively, to control the rotation of the middle and end of the drill pipe section.

[0031] A method for using a drill pipe rotation simulation device based on the same concept, employing the drill pipe rotation simulation device as described in any of the above specific embodiments, includes the following steps:

[0032] One end of the drill rod is fixedly disposed outside one end of the connecting channel of the limiting part, and the other end of the drill rod passes through the connecting channel outside the other end of the connecting channel of the limiting part, so that the middle part of the drill rod is covered inside the connecting channel.

[0033] One end of the drill pipe section is controlled to drive the entire drill pipe section to rotate;

[0034] The other end and the middle part of the drill pipe are rotated separately to generate torque at the other end and the middle part of the drill pipe, respectively, to simulate the rotation state of the drill pipe in the well.

[0035] Stop the rotation of the middle and end parts of the drill pipe, move the limiting part, and change the setting position of the connecting channel;

[0036] Repeat the steps above.

[0037] The drill pipe rotation simulation device of the present invention can simulate the wellbore direction through the connecting channel of the limiting part, and can simulate various wellbore operating conditions during drilling due to the movable arrangement of the connecting channel. Furthermore, the flexible drill pipe section passing through the connecting channel can simulate the operation of the drill pipe. Simultaneously, since the middle and end of the drill pipe section can rotate separately, torque can be generated within the connecting channel, simulating the resistance of the drill pipe in the well. This device can simulate the actual operating state of the drill pipe during drilling, allowing operators to understand the actual operating state of the drill pipe before drilling, so as to promptly resolve or avoid potential dangers during drilling, reduce the probability of drilling accidents, and greatly improve drilling efficiency.

[0038] The method of using the drill pipe rotation state simulation device of the present invention has the same beneficial effects as the drill pipe rotation state simulation device described above, and therefore will not be repeated here.

[0039] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A schematic diagram of a simulation device for the rotation state of a drill pipe in an embodiment of the present invention is shown.

[0042] In the figure, 100 is the limiting part; 110 is the cylinder; 120 is the slide rail; 130 is the fixed seat; 200 is the drill rod part; 210 is the drive assembly; 220 is the connecting assembly; 221 is the first connecting piece; 222 is the second connecting piece; and 230 is the drill bit assembly. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0044] Reference Figure 1 This invention provides a device for simulating the rotation state of a drill pipe, comprising: a limiting part 100 and a drill pipe part 200. The limiting part 100 has a connecting channel for simulating the wellbore orientation. The connecting channel is movably configured to adjust the simulated wellbore orientation. One end of the drill pipe part 200 is disposed on one side of the limiting part 100, and the other end of the drill pipe part 200 passes through the connecting channel to the other side of the limiting part 100. The middle and end portions of the drill pipe part 200 are rotatable respectively, and the middle portion of the drill pipe part 200 is a flexible structure to simulate the rotation state of the drill pipe in the well.

[0045] Specifically, the connecting channel is hollow, allowing for the simulation of wellbore orientation. Furthermore, the connecting channel is movably positioned inside the limiting section 100, enabling adjustment of its location within the limiting section 100 to simulate various wellbore orientations. Simultaneously, one end of the drill pipe section 200 is located on one side of the limiting section 100, while the other end passes through the connecting channel and is located on the other side of the limiting section 100, allowing the middle portion of the drill pipe section 200 to be enclosed within the connecting channel. Both the end and middle portions of the drill pipe section 200 are rotatable. The rotation of one end of the drill pipe section 200 on one side of the limiting section 100 can drive the rotation of the other end of the drill pipe section 200 on the other side of the limiting section 100 and the middle portion of the drill pipe section 200 within the connecting channel, thus achieving a comprehensive simulation of the actual operation of the drill pipe. Furthermore, the other end of the drill pipe section 200, located on the other side of the limiting section 100, can also rotate to generate torque, simulating the resistance experienced by the drill bit during the drilling process. The middle section of the drill pipe section 200, located within the connecting channel, can also rotate to generate torque, simulating the resistance experienced by the drill pipe body during the drilling process. The flexible structure of the middle section of the drill pipe section 200 allows the entire drill pipe section 200 to be more easily inserted into the connecting channel, and enables the simulation of the flexible drill pipe state during actual drilling. The flexible drill pipe section 200 inserted into the connecting channel allows for simulation of drill pipe operation. Simulating the actual operating state of the drill pipe during drilling allows operators to understand the actual operating state of the drill pipe before drilling, enabling timely resolution or avoidance of potential dangerous situations during drilling, reducing the probability of drilling accidents, and greatly improving drilling efficiency.

[0046] In some specific embodiments of the present invention, the limiting part 100 includes a cylinder 110 and a slide rail 120. The cylinder 110 is hollow inside, so that the inner wall of the cylinder 110 can be closed to form a communicating channel. The outer wall of the cylinder 110 is slidably disposed on the slide rail 120 by a slider, so that the cylinder 110 can slide along the setting direction of the slide rail 120, thereby realizing the movable setting of the communicating channel, and thus simulating various well orientations by moving the communicating channel.

[0047] In some specific embodiments of the present invention, the cylinder 110 has a curved structure, such that the connecting channel formed by the inner walls of the cylinder 110 also has a curved structure. The slide rail 120 also has a curved structure, and the curved structure of the cylinder 110 matches the curved structure of the slide rail 120, allowing the cylinder 110 to still drive the connecting channel to slide on the slide rail 120. This facilitates the simulation of the well's orientation.

[0048] Furthermore, the cylinder 110 includes multiple rings that are connected in sequence and can be rotatably connected to each other, so that the overall configuration of the cylinder 110 can be changed by rotating each two adjacent rings, making the simulated wellhead orientation more diverse.

[0049] In some specific embodiments of the present invention, the limiting part 100 further includes a fixing seat 130. The slide rail 120 is fixedly disposed on the fixing seat 130, one end of the drill rod part 200 is fixedly disposed on one side of the fixing part, and the other end of the drill rod part 200 passes through the connecting channel to the other side of the fixing part, thereby facilitating the installation of the limiting part 100 and the drill rod part 200.

[0050] Furthermore, the fixed base 130 has an "L" shaped structure, the slide rail 120 is set on the top surface of the base plate of the fixed base 130, one end of the drill rod 200 is fixedly set on the top of the fixed base 130, and the other end of the drill rod 200 can pass through the connecting channel from the top of the cylinder 110 to the bottom of the fixed base 130, so that the drill rod 200 can pass through the connecting channel.

[0051] Furthermore, the length of the slide rail 120 is greater than that of the cylinder 110. This allows the other end of the drill rod 200 to pass through the connecting channel from the top of the cylinder 110 and slide onto the slide rail 120, thus enabling the drill rod 200 to slide along the slide rail 120. This improves stability and prevents the drill rod 200 from swaying excessively as it rotates, ensuring the accuracy of the simulation results.

[0052] In some specific embodiments of the present invention, the drill pipe section 200 includes a drive assembly 210, a connecting assembly 220, and a drill bit assembly 230. The drive assembly 210 is fixedly disposed on the top of the fixing seat 130 of the limiting section 100, and the output end of the drive assembly 210 is rotatable and passes through the top plate of the fixing seat 130. One end of the connecting assembly 220 is connected to the output end of the drive assembly 210, and the other end of the connecting assembly 220 passes through the communicating channel. The drill bit assembly 230 is disposed on the slide rail 120 and at the end of the connecting assembly 220 away from the drive assembly 210, and the drill bit can be simulated by the drill bit assembly 230. The output end of the drive assembly 210 can drive the connecting assembly 220 and the drill bit assembly 230 connected to the connecting assembly 220 to rotate together, thereby simulating the drilling operation state of the drill pipe.

[0053] Furthermore, the drive assembly 210 can be a rotating motor with a rotatable output end, which facilitates installation and setup.

[0054] Furthermore, the connecting component 220 itself can rotate, thereby generating torque within the connecting channel to simulate the resistance encountered during drilling, making the simulation results more accurate.

[0055] Furthermore, the output end of the drill bit assembly 230 is rotatable and connected to the end of the connecting assembly 220 away from the drive assembly 210. This allows torque to be generated at the output end of the drill bit assembly 230, further simulating the resistance encountered during drilling and making the simulation results more accurate. Moreover, the connection between the output end of the drill bit assembly 230 and the connecting assembly 220 does not affect the sliding of the drill bit assembly 230 on the slide rail 120.

[0056] Furthermore, the drill bit assembly 230 can be a block structure, so that the bottom of the drill bit assembly 230 can be slidably connected to the slide rail 120, and the side of the drill bit assembly 230 can be connected to the connecting assembly 220.

[0057] Furthermore, the connecting component 220 is a flexible structure as a whole, which enables the middle part of the drill rod section 200 located in the connecting channel to form a flexible structure.

[0058] In some specific embodiments of the present invention, the connecting component 220 includes a first connector 221 and a second connector 222. The first connector 221 is connected to the output end of the drive component 210, and power can be transmitted to the drive component 210 through the first connector 221. The second connector 222 is connected to the first connector 221, and the second connector 222 is a flexible structure. The flexible structure of the second connector 222 makes the entire connecting component 220 a flexible structure, thereby forming a flexible structure in the middle of the drill rod portion 200 located in the communicating channel.

[0059] It should be noted that the output of the drive component 210 can also be directly connected to the second connector 222, which is simple, flexible, and easy to set up. However, because the second connector 222 is a flexible structure, the transmission performance of the first connector 221 is better.

[0060] In some specific embodiments of the present invention, there are multiple first connectors 221 and multiple second connectors 222. The multiple first connectors 221 and multiple second connectors 222 are staggered. This allows the overall structure of the connecting assembly 220 to be configured according to the orientation of the connecting channel, facilitating the installation of the connecting assembly 220 within the connecting channel. Furthermore, different arrangements and combinations of the first connectors 221 and second connectors 222 can simulate various working conditions in actual applications, such as directional wells and horizontal wells.

[0061] Furthermore, the first connector 221 and the second connector 222 are threaded together, which facilitates the installation and adjustment of the distribution and arrangement of the first connector 221 and the second connector 222.

[0062] Furthermore, the first connector 221 can be a vertically shaped drive shaft, and the second connector 222 can be a spring or other flexible structure.

[0063] In some specific embodiments of the present invention, a first resistance motor is provided inside the first connector 221.

[0064] The first resistance motor can drive the first connecting member 221 to rotate to a certain extent, thereby enabling the first connecting member 221 to generate torque. In turn, the first connecting member 221 can enable the connecting component 220 located in the connecting channel to generate torque, thereby simulating the resistance encountered during drilling and ensuring the accuracy of the simulation results.

[0065] In some specific embodiments of the present invention, a second resistance motor is provided inside the drill bit assembly 230. The second resistance motor can drive the drill bit assembly 230 to rotate, and the output end of the second resistance motor is connected to the end of the connecting assembly 220 away from the driving assembly 210, thereby enabling the drill bit assembly 230 to generate torque, further simulating the resistance encountered during drilling and ensuring the accuracy of the simulation results.

[0066] In some specific embodiments of the present invention, a main controller is also included. The main controller is connected to the middle and end portions of the drill pipe section 200, respectively, and controls the rotation of the middle and end portions of the drill pipe section 200. Specifically, the main controller is connected to the drive assembly 210 of the drill pipe section 200, the first connector 221 of the connecting assembly 220 of the drill pipe section 200, and the drill bit assembly 230 of the drill pipe section 200, thereby enabling it to control the rotation of the output end of the drive assembly 210 of the drill pipe section 200, the first connector 221 of the connecting assembly 220 of the drill pipe section 200, and the output end of the drill bit assembly 230 of the drill pipe section 200, thereby controlling the rotational speed and generated torque of the simulated drill pipe.

[0067] It should be noted that the main controller can control the first connector 221 of the connecting assembly 220 of the drill pipe section 200 and the output end of the drill bit assembly 230 of the drill pipe section 200 to rotate at a fixed speed, so that the resistance encountered can be a fixed value. The main controller can also control the first connector 221 of the connecting assembly 220 of the drill pipe section 200 and the output end of the drill bit assembly 230 of the drill pipe section 200 to rotate at various different speeds, so that the resistance encountered can exhibit a periodic change, wherein this periodic change can be a sine wave or a square wave curve. Furthermore, the resistance encountered can also achieve non-periodic complex changes through waveform combinations, thereby simulating complex working conditions, such as stick-slip phenomena in drilling.

[0068] The present invention also provides a method for using a drill pipe rotation simulation device, which employs the drill pipe rotation simulation device as described in any of the above specific embodiments, and includes the following steps:

[0069] One end of the drill pipe section 200 is fixedly positioned outside one end of the connecting channel of the limiting part 100. The other end of the drill pipe section 200 is then inserted through the connecting channel, so that the middle portion of the drill pipe section 200 is enclosed within the connecting channel. One end of the drill pipe section 200 is controlled to rotate the entire drill pipe section 200. The other end and the middle portion of the drill pipe section 200 are controlled to rotate separately, generating torque at each end to simulate the rotation of the drill pipe within the well. The rotation of the middle and end portions of the drill pipe section 200 is stopped, and the limiting part 100 is moved to change the position of the connecting channel. The above steps are repeated.

[0070] Specifically, the drive assembly 210 is fixedly mounted on the top of the fixed base 130, with its output end passing through the top plate of the fixed base 130. Multiple first connectors 221 and multiple second connectors 222 are alternately connected and pass through the communicating channel of the cylinder 110. The drill bit assembly 230 is slidably mounted on the slide rail 120, and its output end is connected to the output end of the drive assembly 210 via the multiple first connectors 221 and multiple second connectors 222. The main controller controls the output end of the drive assembly 210 to drive the connecting assembly 220 and the drill bit assembly 230 to rotate, thereby simulating the drilling operation of the drill pipe. Simultaneously, the main controller controls the output end of the drill bit assembly 230 and the first connectors 221 of the connecting assembly 220 to rotate respectively, thereby generating torque to simulate the resistance experienced by the drill pipe in the well. The main controller observes in real time to obtain real-time data of the simulated drill pipe operation, completing data collection. The main controller stops the rotation of the output ends of drive assembly 210, drill bit assembly 230, and the first connector 221 of connecting assembly 220. The cylinder 110 is moved along slide rail 120 to change the position of the connecting channel, and the above steps are repeated.

[0071] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for simulating the rotation state of a drill pipe, characterized in that, include: A limiting section, wherein a connecting channel for simulating the orientation within a well is provided; The connecting channel is movable to adjust the simulated wellbore orientation; A drill rod portion, one end of which is disposed on one side of the limiting portion, and the other end of which passes through the connecting channel to the other side of the limiting portion; The middle and end sections of the drill pipe can rotate separately, and the middle section of the drill pipe is a flexible structure to simulate the rotation state of the drill pipe in the well.

2. The device for simulating the rotation state of a drill pipe according to claim 1, characterized in that, The limiting part includes: A cylindrical body, the interior of which is hollow, such that the inner wall of the cylindrical body encloses the communicating channel; The cylinder is slidably mounted on the slide rail to drive the connecting channel to move.

3. The device for simulating the rotation state of the drill pipe according to claim 2, characterized in that, The cylindrical body has a curved structure; The slide rail is also a curved structure adapted to the cylinder.

4. The device for simulating the rotation state of a drill pipe according to claim 1, characterized in that, The drill pipe section includes: A drive assembly is disposed on one side of the limiting portion, and the output end of the drive assembly is rotatable; A connecting component, one end of which is connected to the output end of the driving component, and the other end of which passes through the communicating channel to the other side of the limiting part; A drill bit assembly is disposed at the end of the connecting assembly away from the driving assembly, and is used to simulate a drill bit.

5. The device for simulating the rotation state of a drill pipe according to claim 4, characterized in that, The connection component includes: A first connector is connected to the output end of the drive assembly for transmission. The second connector is connected to the first connector, and the second connector is a flexible structure.

6. The device for simulating the rotation state of a drill pipe according to claim 5, characterized in that, The first connector is multiple; There are also multiple second connectors; The plurality of first connectors and the plurality of second connectors are alternately connected.

7. The device for simulating the rotation state of a drill pipe according to claim 6, characterized in that, The first connecting member is equipped with a first resistance motor; The first resistance motor can drive the first connecting member to rotate in order to generate torque.

8. The device for simulating the rotation state of a drill pipe according to claim 4, characterized in that, The drill bit assembly is equipped with a second resistance motor; The second resistance motor can drive the drill bit assembly to rotate in order to generate torque.

9. The apparatus for simulating the rotation state of a drill pipe according to any one of claims 1 to 8, characterized in that, Also includes: A main controller is connected to the middle and end of the drill pipe section, respectively, to control the rotation of the middle and end of the drill pipe section.

10. A method of using a drill pipe rotation simulation device, comprising the drill pipe rotation simulation device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: One end of the drill rod is fixedly disposed outside one end of the connecting channel of the limiting part, and the other end of the drill rod passes through the connecting channel outside the other end of the connecting channel of the limiting part, so that the middle part of the drill rod is covered inside the connecting channel. One end of the drill pipe section is controlled to drive the entire drill pipe section to rotate; The other end and the middle part of the drill pipe are rotated separately to generate torque at the other end and the middle part of the drill pipe, respectively, to simulate the rotation state of the drill pipe in the well. Stop the rotation of the middle and end parts of the drill pipe, move the limiting part, and change the setting position of the connecting channel; Repeat the steps above.

Images