Intelligent drilling and completion simulation experiment system

Abstract

The application provides a kind of intelligent drilling and completion simulation experiment system, belongs to drilling and completion simulation experiment technical field.The base is slidably connected with gantry on the top of base, the movable drilling rig system is slidably connected on the top of base, the rock sample loading system and the rack are fixedly connected in the base, the simulation wellbore is laid on the rack, and the simulation wellbore is composed of two types of wellbore structures, including straight type and curved type.The application can realize flexible movement of the overall position of drilling rig structure by setting movable drilling rig system with variable wellbore arrangement system, and can adjust the working height and inclination angle of drilling execution end by angle adjusting structure and height adjusting structure, and can adapt to two types of different borehole paths, including straight type and curved type, by rotatable rock sample loading cylinder and multiple types of simulation wellbore that can be arbitrarily spliced and combined, and can carry different sizes and different types of rock samples to simulate various complex downhole drilling and completion conditions.

Description

Technical Field

[0001] This invention relates to the field of drilling and completion simulation experiment technology, and in particular to an intelligent drilling and completion simulation experiment system. Background Technology

[0002] As oil and gas exploration and development gradually shifts towards deep formations, deep sea, and unconventional deep wells, ultra-deep wells, extended reach wells, and ultra-long horizontal wells, these have become the main well types for oil and gas development. In these complex well types, the longitudinal, lateral, and torsional coupled vibrations of the thousands of meters of drill string result in exceptionally complex dynamic characteristics of the drill bit downhole, which seriously affects the drill bit's lifespan and rock-breaking efficiency.

[0003] Currently, although some progress has been made in the field of intelligent drilling and completion technology both domestically and internationally, such as the research and application of equipment like Baker Hughes TerrAdapt intelligent drill bit, Halliburton iCruise rotary steering system, and CNOOC's "Xuanji" rotary steering system, which have promoted the initial advancement of drilling and completion technology from informatization to automation, existing experimental systems generally suffer from problems such as single simulated working conditions and low parameter control accuracy, which seriously restrict the industrialization process of intelligent drilling and completion technology. In summary, this invention provides a downhole robot intelligent drilling and completion simulation experimental device to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide an intelligent drilling and completion simulation experimental system. By setting up a movable drilling rig system with a variable wellbore layout system, the overall position of the drilling rig structure can be flexibly moved. At the same time, through the cooperation of angle adjustment structure and height adjustment structure, the working height and tilt angle of the drilling execution end can be adjusted. With the addition of a rotatable rock sample loading cylinder and multiple types of simulated wellbores that can be arbitrarily spliced ​​and combined, it can adapt to both straight and curved wellbore paths. It can also carry rock samples of different sizes and types, and can simulate a variety of complex downhole drilling and completion conditions. Through the above settings, the problems of traditional simulation experimental devices such as single working conditions, poor adaptability, and low parameter control accuracy can be solved.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An intelligent drilling and completion simulation experimental system includes a base, a gantry frame slidably connected to the top of the base, a movable drilling rig system slidably connected to the top of the base, a rock sample loading system and a placement frame fixedly connected inside the base, and a simulated wellbore arranged on the placement frame. The simulated wellbore is composed of a combination of straight and curved wellbore structures. The movable drilling rig system includes a moving platform and a support frame, the support frame being rotatably connected to the top of the moving platform, and a drilling rig connector mounted on the support frame. The rock sample loading system includes a mounting frame and a rock sample loading cylinder, the rock sample loading cylinder being rotatably connected to the top of the mounting frame. The system also includes a variable wellbore arrangement system, which is used for arbitrary splicing and combination of multi-specification simulated wellbores, and is connected to both the base and the simulated wellbore.

[0006] Optionally, a fixed base is fixedly connected to the top of the mobile platform, and the fixed base is rotatably hinged to both sides of the bottom of the support frame. A first hydraulic telescopic rod is rotatably connected to the top of the mobile platform, and the end of the first hydraulic telescopic rod away from the mobile platform is rotatably hinged to the support frame. Two second hydraulic telescopic rods are symmetrically arranged on the support frame, and the telescopic ends of the second hydraulic telescopic rods are fixed to the drilling rig connector. A pneumatic clamp is fixedly connected to the top of the mobile platform, and the pneumatic clamp cooperates with the drilling rig connector.

[0007] Optionally, a drive mechanism is fixedly connected to the top of the mounting frame, the drive mechanism being used to drive the rock sample loading cylinder to rotate on the top of the mounting frame, and a transition wellbore is fixedly connected to the top of the rock sample loading cylinder.

[0008] Optionally, the variable wellbore layout system includes a guide rail fixedly connected to the base, a bottom pipe rack fixedly connected to the top of the guide rail, a top pipe rack correspondingly provided on the top of the bottom pipe rack, and the simulated wellbore being detachably inserted and clamped between the bottom pipe rack and the top pipe rack; the variable wellbore layout system also includes an outer sealing sleeve sleeved on the end of the simulated wellbore, an inner sealing sleeve fixedly connected to the side of the outer sealing sleeve away from the simulated wellbore, an outer sealing ring fixedly connected between the outer sealing sleeve and the inner sealing sleeve, and an inner sealing ring fixedly connected to the inner wall of the outer sealing ring.

[0009] Optionally, a fixing bracket is fixedly connected to one side of the guide rail, and two side baffles are symmetrically arranged on the top of the guide rail. The distance between the two side baffles is adapted to and limited by the bottom width of the bottom tube frame. An installation groove is opened in the middle of the guide rail, and the bottom tube frame is locked and fixed inside the installation groove by bolts and nuts.

[0010] Optionally, adjusting cylinders are fixedly connected to both sides of the bottom tube frame and the top of the top tube frame. A clamping plate is slidably connected inside the adjusting cylinder. A first adjusting knob is threadedly connected to the end of the adjusting cylinder. A second adjusting knob is slidably connected to the outer wall of the adjusting cylinder. The second adjusting knob is threadedly connected to the clamping plate. An avoidance groove is provided on the adjusting cylinder for the second adjusting knob to slide and limit its movement. The bottom tube frame and the top tube frame are locked and fixed together by bolts and nuts.

[0011] Optionally, the inner wall of the outer sealing sleeve is fitted with the outer wall of the simulated wellbore, and the outer wall of the inner sealing sleeve is fitted with the inner wall of the simulated wellbore.

[0012] Optionally, each of the two adjacent simulated wellbore joint ends is equipped with two sets of outer sealing sleeves and inner sealing sleeves, with a pre-reserved sealing gap between the outer sealing sleeves and the inner sealing sleeves, and the outer sealing rings are embedded and secured in the sealing gap on both sides.

[0013] Optionally, the outer sealing ring has a first hollow cavity, and the inner sealing ring has a second hollow cavity that matches its contour. The outer wall of the inner sealing ring is in contact with the inner wall of the inner sealing sleeve.

[0014] Optionally, a compression plate is installed on the outer side of the outer sealing sleeve, and a third adjusting knob is provided on the compression plate. The third adjusting knob passes through the compression plate, the outer sealing sleeve, the inner sealing sleeve and the outer sealing ring in sequence to achieve overall compression and fixation.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a mobile drilling rig system with a variable wellbore layout system, the overall position of the drilling rig structure can be flexibly moved. At the same time, by coordinating the angle adjustment structure and the height adjustment structure, the working height and tilt angle of the drilling execution end can be adjusted. With the rotatable rock sample loading cylinder and multiple types of simulated wellbores that can be arbitrarily spliced ​​and combined, it can adapt to two different wellbore paths, namely straight and curved ones. It can also carry rock samples of different sizes and types, and can simulate a variety of complex downhole drilling and completion conditions. This effectively solves the problems of single working conditions and poor adaptability of traditional simulation experimental devices, and greatly improves the versatility and experimental applicability of the device. Attached Figure Description

[0016] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0017] Figure 1A first-person perspective 3D structural diagram of an intelligent drilling and completion simulation experimental system; Figure 2 A schematic diagram of the second-view three-dimensional structure of an intelligent drilling and completion simulation experimental system; Figure 3 A first-person perspective 3D structural diagram of a mobile drilling rig system; Figure 4 This is a second-view three-dimensional structural diagram of a mobile drilling rig system. Figure 5 A cross-sectional three-dimensional structural diagram of an intelligent drilling and completion simulation experimental system; Figure 6 This is a schematic diagram of the three-dimensional structure of the rock sample loading system; Figure 7 A schematic diagram of the placement frame and the simulated well shaft three-dimensional structure; Figure 8 A first-person perspective three-dimensional structural diagram of a variable wellbore layout system; Figure 9 for Figure 8 A partially enlarged structural diagram; Figure 10 A first-view 3D structural diagram of the bottom and top pipe racks; Figure 11 A second-view three-dimensional structural diagram of the bottom and top tube racks; Figure 12 This is a schematic diagram simulating the three-dimensional structure of the wellbore and the outer sealing ring; Figure 13 A schematic diagram of the cross-sectional three-dimensional structure simulating the wellbore and outer sealing ring; Figure 14 A cross-sectional three-dimensional structural diagram of the outer and inner sealing rings; Figure 15 This is a schematic diagram of the three-dimensional structure of the extrusion plate; Figure 16 This is a schematic diagram of the three-dimensional structure of the outer sealing sleeve and the inner sealing sleeve.

[0018] Figure label: 1. Base; 2. Gantry; 3. Moving platform; 4. Fixed base; 5. Support frame; 6. First hydraulic telescopic rod; 7. Second hydraulic telescopic rod; 8. Drilling rig connector; 9. Pneumatic clamp; 10. Mounting frame; 11. Rock sample loading cylinder; 12. Transition wellbore; 13. Drive mechanism; 14. Placement frame; 15. Simulated wellbore; 16. Guide rail; 17. Fixing frame; 18. Side baffle; 19. Mounting slot; 20. Bottom pipe rack; 21. Top pipe rack 22. Adjusting cylinder; 23. Clamping plate; 24. First adjusting knob; 25. Second adjusting knob; 26. Outer sealing sleeve; 27. Inner sealing sleeve; 28. Outer sealing ring; 29. ​​Inner sealing ring; 30. First hollow cavity; 31. Second hollow cavity; 32. Extrusion plate; 33. Third adjusting knob; 34. Movable drilling rig system; 35. Rock sample loading system; 36. Variable wellbore layout system; 37. Avoidance groove; 38. Bolt; 39. Nut. Detailed Implementation

[0019] The intelligent drilling and completion simulation experimental system provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0020] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0021] like Figures 1 to 7As shown, an embodiment of the present invention provides an intelligent drilling and completion simulation experimental system, including a base 1, a gantry frame 2 slidably connected to the top of the base 1, a placement frame 14 fixedly connected inside the base 1, a simulated wellbore 15 arranged on the placement frame 14, the simulated wellbore 15 being composed of a combination of straight and curved wellbore structures, a movable drilling rig system 34 slidably connected to the top of the base 1, the movable drilling rig system 34 including a mobile platform 3 and a support frame 5, the support frame 5 being rotatably connected to the top of the mobile platform 3, and a drilling rig being mounted on the support frame 5. The top of the mobile platform 3 is fixedly connected to the machine connector 8 and the fixed base 4. The fixed base 4 is rotatably hinged to the bottom sides of the support frame 5. The top of the mobile platform 3 is rotatably connected to the first hydraulic telescopic rod 6. The end of the first hydraulic telescopic rod 6 away from the mobile platform 3 is rotatably hinged to the support frame 5. Two second hydraulic telescopic rods 7 are symmetrically arranged on the support frame 5. The telescopic ends of the second hydraulic telescopic rods 7 are fixed to the drilling machine connector 8. The top of the mobile platform 3 is fixedly connected to the pneumatic clamp 9, which corresponds to and cooperates with the drilling machine connector 8.

[0022] In the above structure, the bottom of the support frame 5 is rotatably connected to the fixed base 4 on the top of the mobile platform 3. The relative angle between the support frame 5 and the mobile platform 3 can be adjusted by driving the first hydraulic telescopic rod 6, thereby adjusting the relative angle between the drilling rig connector 8 and the mobile platform 3. In addition, the installation height of the drilling rig connector 8 on the support frame 5 can be adjusted by driving the second hydraulic telescopic rod 7, thereby adjusting the relative height between the drilling rig connector 8 and the mobile platform 3. In summary, the experimenter can use the mobile drilling rig system 34 to move the drilling rig connector 8 on the top of the base 1. After moving to a suitable experimental position, the working height and tilt angle of the drilling rig connector 8 can be adjusted by using the first hydraulic telescopic rod 6 and the second hydraulic telescopic rod 7, respectively. This allows the mobile drilling rig system 34 to be adapted to different types of simulated wellbore 15 to carry out simulated drilling experiments, effectively improving the versatility and applicability of this simulation experiment system.

[0023] Optionally, the pneumatic clamp 9 can clamp and fix simulated wellbore 15 of different diameters, and can also adapt to the height and angle adjustment of the drilling rig connector 8 to avoid displacement or shaking of the simulated wellbore 15 due to factors such as drill string movement and high-pressure drilling fluid impact during the drilling experiment, effectively improving the stability of the experimental process and the accuracy of the experimental data; the specific working principle of the pneumatic clamp 9 in this technical solution is the existing publicly available technology, and will not be described in detail here.

[0024] In this embodiment, as Figures 1 to 6As shown, a rock sample loading system 35 is fixedly connected inside the base 1. The rock sample loading system 35 includes a mounting frame 10 and a rock sample loading cylinder 11. The rock sample loading cylinder 11 is rotatably connected to the top of the mounting frame 10. A driving mechanism 13 is fixedly connected to the top of the mounting frame 10. The driving mechanism 13 is used to drive the rock sample loading cylinder 11 to rotate on the top of the mounting frame 10. A transition well cylinder 12 is fixedly connected to the top of the rock sample loading cylinder 11.

[0025] In the above structure, under the driving action of the drive mechanism 13, the rock sample loading cylinder 11 can rotate freely on the top of the mounting frame 10 to complete the angle adjustment. The transition well cylinder 12 is used to realize the connection and assembly between the drilling rig connector 8 and the rock sample loading cylinder 11. Under the clamping and fixing action of the pneumatic clamp 9, the assembly and fit stability between the transition well cylinder 12 and the drilling rig connector 8 can be effectively improved. In addition, the rock sample loading cylinder 11 can be loaded with rock samples of different sizes and types, so that this experimental device can carry out simulated drilling experiments for various rock samples, simulate a variety of complex downhole working conditions, and further improve and perfect the versatility and applicability of this simulation experimental system.

[0026] As one implementation method in this embodiment, such as Figures 5 to 11 As shown, the variable wellbore arrangement system 36 is used for arbitrary splicing and combination of multi-specification simulated wellbores 15. The variable wellbore arrangement system 36 is connected to the base 1 and the simulated wellbore 15 respectively. The variable wellbore arrangement system 36 includes a guide rail 16 fixedly connected in the base 1. A bottom pipe rack 20 is fixedly connected to the top of the guide rail 16. A top pipe rack 21 is correspondingly provided on the top of the bottom pipe rack 20. The simulated wellbore 15 is detachably inserted and clamped between the bottom pipe rack 20 and the top pipe rack 21. A fixing frame 17 is fixedly connected to one side of the guide rail 16. Two side baffles 18 are symmetrically provided on the top of the guide rail 16. The distance between the two side baffles 18 is adapted to the bottom width of the bottom pipe rack 20. The guide rail 16 has a mounting groove 19 in the middle. The bottom tube frame 20 is locked and fixed inside the mounting groove 19 by bolts and nuts. Adjusting cylinders 22 are fixedly connected to both sides of the bottom tube frame 20 and the top of the top tube frame 21. A clamping plate 23 is slidably connected inside the adjusting cylinder 22. A first adjusting knob 24 is threadedly connected to the end of the adjusting cylinder 22. A second adjusting knob 25 is slidably connected to the outer wall of the adjusting cylinder 22. The second adjusting knob 25 is threadedly connected to the clamping plate 23. An avoidance groove 37 is provided on the adjusting cylinder 22 for the second adjusting knob 25 to slide and limit. The bottom tube frame 20 and the top tube frame 21 are locked and fixed by bolts 38 and nuts 39.

[0027] In the above structure, both the bottom tube frame 20 and the top tube frame 21 are slidably mounted on the top of the guide rail 16. The bottom sides of the bottom tube frame 20 are blocked and limited by the side baffles 18. After the assembly positions of the bottom tube frame 20 and the top tube frame 21 are adjusted to the correct positions, they can be locked and fixed to the guide rail 16 by bolts and nuts. With this setting, the bottom tube frame 20 and the top tube frame 21 can conform to the contour of the guide rail 16 and their installation and fixing positions on the guide rail 16 can be adjusted arbitrarily.

[0028] Furthermore, both the bottom pipe rack 20 and the top pipe rack 21 are equipped with clamping plates 23 for clamping the simulated well shaft 15. The clamping plates 23 are not only slidably mounted inside the adjusting cylinder 22, but can also be locked and fixed by the first adjusting knob 24 and the second adjusting knob 25, thereby adjusting the assembly position of the clamping plates 23 relative to the bottom pipe rack 20 and the top pipe rack 21. Through this adjustable structure, the bottom pipe rack 20 and the top pipe rack 21 can be adapted to clamp and fix simulated well shafts 15 of different sizes. When the bottom pipe rack 20 and the top pipe rack 21 are locked and fixed on the guide rail 16, they can provide stable support and positioning for the simulated well shaft 15. Experimenters can fix the two sets of bottom pipe racks 20 and top pipe racks 21 on both sides of the splicing position of the two adjacent sets of simulated well shafts 15, and use the two sets of bottom pipe racks 20 and top pipe racks 21 to lock and limit the two sets of connected simulated well shafts 15, effectively ensuring the firmness and integrity of the splicing assembly of the multi-segment simulated well shafts 15.

[0029] In this technical solution, the overall outline of the guide rail 16 can be customized according to the actual experimental requirements. The structural outline of the guide rail 16 shown in the attached drawings of this application specification is applicable to the splicing and assembly of horizontal and curved simulated well barrels 15. The splicing and assembly methods of other types of simulated well barrels 15 are similar and will not be shown one by one here.

[0030] In summary, by setting up the variable wellbore arrangement system 36, arbitrary splicing and combination of multiple specifications and types of simulated wellbores 15 can be realized. During the splicing process of the simulated wellbore 15, the bottom pipe support 20 and the top pipe support 21 can not only provide support and positioning for the simulated wellbore 15, but also ensure the overall stability of the spliced ​​structure of the simulated wellbore 15. At the same time, the bottom pipe support 20 and the top pipe support 21 can freely slide and adjust their positions according to the contour of the guide rail 16 to adapt to the splicing and assembly requirements of different types of simulated wellbore 15, ensuring the stability of various simulated wellbore 15 structures after splicing. Therefore, this experimental device can match different types of simulated wellbore 15 to complete simulated drilling experiments under various downhole working conditions, greatly improving the experimental adaptability and application range of the device.

[0031] In this embodiment, as Figures 5 to 16As shown, the variable wellbore layout system 36 further includes an outer sealing sleeve 26 fitted onto the end of the simulated wellbore 15. An inner sealing sleeve 27 is fixedly connected to the side of the outer sealing sleeve 26 away from the simulated wellbore 15. An outer sealing ring 28 is fixedly connected between the outer sealing sleeve 26 and the inner sealing sleeve 27. An inner sealing ring 29 is fixedly connected to the inner wall of the outer sealing ring 28. The inner wall of the outer sealing sleeve 26 fits against the outer wall of the simulated wellbore 15, and the outer wall of the inner sealing sleeve 27 fits against the inner wall of the simulated wellbore 15. Two sets of outer sealing sleeves 26 and inner sealing sleeves 29 are fitted to the docking ends of two adjacent sections of the simulated wellbore 15. 7. A sealing gap is reserved between the outer sealing sleeve 26 and the inner sealing sleeve 27. The outer sealing ring 28 is embedded and clamped in the sealing gap on both sides. The outer sealing ring 28 has a first hollow cavity 30, and the inner sealing ring 29 has a second hollow cavity 31 that matches its contour. The outer wall of the inner sealing ring 29 fits against the inner wall of the inner sealing sleeve 27. A compression plate 32 is installed on the outer side of the outer sealing sleeve 26. A third adjusting knob 33 is passed through the compression plate 32. The third adjusting knob 33 passes through the compression plate 32, the outer sealing sleeve 26, the inner sealing sleeve 27 and the outer sealing ring 28 in sequence to achieve overall compression and fixation.

[0032] As mentioned above, during the assembly of the simulated well shaft 15, the bottom pipe support 20 and the top pipe support 21 not only provide support and positioning for the simulated well shaft 15, but also ensure the overall stability of the assembled structure. Furthermore, the installation of outer sealing sleeves 26, inner sealing sleeves 27, and outer sealing rings 28 at the jointing points of adjacent sets of simulated well shafts 15 effectively improves the overall sealing performance after assembly. Specifically, outer sealing sleeves 26 are fitted on both sides of the outer sealing ring 28. The inner sealing sleeve 27 and the outer sealing sleeve 26 are fitted together on the outer wall of the simulated well shaft 15, and the inner sealing sleeve 27 is fitted together on the inner wall of the simulated well shaft 15. This can form a wrap-around limiting and fixing of the docking ends of the simulated well shaft 15. Since a sealing gap is reserved between the outer sealing sleeve 26 and the inner sealing sleeve 27, and the two sides of the outer sealing ring 28 are respectively embedded and clamped in the sealing gap formed by the two sets of outer sealing sleeves 26 and inner sealing sleeves 27, the docking positioning and connection fixing between the two adjacent sections of the simulated well shaft 15 can be achieved.

[0033] Furthermore, since the third adjustment knob 33 passes through the extrusion plate 32, the outer sealing sleeve 26, the inner sealing sleeve 27, and the outer sealing ring 28 in sequence, it can achieve overall compression and fixation. Therefore, when the experimenter tightens the third adjustment knob 33, the clamping force of the extrusion plate 32 can be used to simultaneously compress and limit the outer sealing sleeve 26 and the inner sealing sleeve 27 on both sides of the outer sealing ring 28. During the compression process, the stability of the splicing structure of the two adjacent simulated well shafts 15 can be effectively guaranteed. At the same time, after the outer sealing sleeve 26 and the inner sealing sleeve 27 are compressed, they will squeeze the first hollow cavity 30 located inside the outer sealing ring 28. During the compression process, the first hollow cavity 30 can cause the outer sealing ring 28 to undergo slight deformation, further fitting the splicing gap, significantly improving the sealing effect of the docking position of the adjacent simulated well shafts 15, and ensuring the overall sealing performance of the simulated well shafts 15 after splicing.

[0034] Furthermore, the inner sealing ring 29 has a second hollow cavity 31 that matches its contour, and the outer wall of the inner sealing ring 29 is tightly fitted with the inner wall of the inner sealing sleeve 27. Therefore, when the experimenter tightens the third adjustment knob 33, the inner sealing sleeves 27 on both sides of the outer sealing ring 28 will be compressed and squeezed by the inner sealing ring 29, forcing the second hollow cavity 31 inside the inner sealing ring 29 to undergo slight deformation. The deformed second hollow cavity 31 can fully fill the assembly gap between the outer sealing ring 28 and the inner sealing sleeve 27, eliminate the hidden danger of splicing gap, and further enhance the sealing performance of the simulated well shaft 15 after splicing and assembly.

[0035] The above-mentioned structure, combined with the bottom pipe rack 20 and the top pipe rack 21, provides support, positioning, and locking for the simulated wellbore 15. This experimental device not only enables flexible and arbitrary splicing and combination of simulated wellbores 15 of various specifications and types, but also has the advantages of convenient and efficient splicing operation, high splicing structure strength, and excellent assembly sealing. It can meet the testing requirements of simulated drilling experiments under various working conditions, effectively avoid experimental errors caused by splicing looseness and sealing failure, and significantly improve the accuracy and reliability of experimental data.

[0036] The working principle of the technical solution provided by this invention is as follows: In use, the experimenter moves the mobile platform 3 to the top of the rock sample loading cylinder 11, starts the drive mechanism 13 to drive and adjust the deflection angle of the rock sample loading cylinder 11, so that the transition well barrel 12 is precisely aligned with the drilling rig connector 8. At the same time, the first hydraulic telescopic rod 6 is started to drive and adjust the relative angle between the drilling rig connector 8 and the mobile platform 3, so that the drilling rig connector 8 and the transition well barrel 12 are kept coaxially aligned. Then, the drilling rig connector 8 and the transition well barrel 12 are locked and fixed. The stability of the assembly and cooperation between the drilling rig connector 8 and the transition well barrel 12 is further improved by the clamping and limiting effect of the pneumatic clamp 9. After the assembly is completed, drilling simulation experiments can be carried out on the rock sample loaded inside the rock sample loading cylinder 11.

[0037] According to the actual experimental conditions, the experimenters can selectively assemble different types of simulated wellbore 15. During the assembly process, the bottom pipe rack 20 and the top pipe rack 21 are used to support, position and lock the simulated wellbore 15. At the same time, the outer sealing sleeve 26, the inner sealing sleeve 27 and the outer sealing ring 28 work together to perform multi-layer sealing treatment on the splicing gaps of adjacent simulated wellbore 15, which effectively improves the structural stability and overall sealing performance of the multi-segment simulated wellbore 15 after assembly. After the simulated wellbore 15 is assembled, the moving platform 3 is moved to the end position of the simulated wellbore 15. By adjusting the working height and tilt angle of the drilling rig connector 8, the drilling rig connector 8 and the end of the simulated wellbore 15 are precisely assembled and connected. After that, according to the overall splicing contour of the simulated wellbore 15, drilling and completion simulation experiments of different wellbore paths can be carried out to realize multi-condition and multi-scenario experimental simulation, which greatly expands the experimental adaptability range of the device.

[0038] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An intelligent drilling and completion simulation experimental system, comprising a base, characterized in that, A gantry frame is slidably connected to the top of the base, and a movable drilling rig system is slidably connected to the top of the base. A rock sample loading system and a placement frame are fixedly connected inside the base. A simulated wellbore is arranged on the placement frame. The simulated wellbore is composed of a combination of straight and curved wellbore structures. The mobile drilling rig system includes a mobile platform and a support frame, the support frame being rotatably connected to the top of the mobile platform, and a drilling rig connector being installed on the support frame; The rock sample loading system includes a mounting frame and a rock sample loading cylinder, the rock sample loading cylinder being rotatably connected to the top of the mounting frame; It also includes a variable wellbore layout system, which is used for arbitrary splicing and combination of multi-specification simulated wellbores, and the variable wellbore layout system is connected to the base and the simulated wellbore respectively.

2. The intelligent drilling and completion simulation experimental system according to claim 1, characterized in that, A fixed base is fixedly connected to the top of the mobile platform. The fixed base is rotatably hinged to both sides of the bottom of the support frame. A first hydraulic telescopic rod is rotatably connected to the top of the mobile platform. The end of the first hydraulic telescopic rod away from the mobile platform is rotatably hinged to the support frame. Two second hydraulic telescopic rods are symmetrically arranged on the support frame. The telescopic ends of the second hydraulic telescopic rods are fixed to the drilling rig connector. A pneumatic clamp is fixedly connected to the top of the mobile platform. The pneumatic clamp is correspondingly engaged with the drilling rig connector.

3. The intelligent drilling and completion simulation experimental system according to claim 1, characterized in that, A drive mechanism is fixedly connected to the top of the mounting frame. The drive mechanism is used to drive the rock sample loading cylinder to rotate on the top of the mounting frame. A transition well cylinder is fixedly connected to the top of the rock sample loading cylinder.

4. The intelligent drilling and completion simulation experimental system according to claim 1, characterized in that, The variable wellbore layout system includes a guide rail fixedly connected to the base, a bottom pipe rack fixedly connected to the top of the guide rail, a top pipe rack correspondingly provided on the top of the bottom pipe rack, and the simulated wellbore being detachably inserted and clamped between the bottom pipe rack and the top pipe rack. The variable wellbore layout system also includes an outer sealing sleeve fitted at the end of the simulated wellbore. An inner sealing sleeve is fixedly connected to the side of the outer sealing sleeve away from the simulated wellbore. An outer sealing ring is fixedly connected between the outer sealing sleeve and the inner sealing sleeve. An inner sealing ring is fixedly connected to the inner wall of the outer sealing ring.

5. The intelligent drilling and completion simulation experimental system according to claim 4, characterized in that, A fixing bracket is fixedly connected to one side of the guide rail. Two side baffles are symmetrically arranged on the top of the guide rail. The distance between the two side baffles is adapted to and limited by the bottom width of the bottom tube frame. An installation groove is opened in the middle of the guide rail. The bottom tube frame is locked and fixed inside the installation groove by bolts and nuts.

6. The intelligent drilling and completion simulation experimental system according to claim 4, characterized in that, Adjusting cylinders are fixedly connected to both sides of the bottom tube frame and the top of the top tube frame. A clamping plate is slidably connected inside the adjusting cylinder. A first adjusting knob is threadedly connected to the end of the adjusting cylinder. A second adjusting knob is slidably connected to the outer wall of the adjusting cylinder. The second adjusting knob is threadedly connected to the clamping plate. An avoidance groove is provided on the adjusting cylinder for the second adjusting knob to slide and limit its movement. The bottom tube frame and the top tube frame are locked and fixed together by bolts and nuts.

7. The intelligent drilling and completion simulation experimental system according to claim 4, characterized in that, The inner wall of the outer sealing sleeve is in contact with the outer wall of the simulated wellbore, and the outer wall of the inner sealing sleeve is in contact with the inner wall of the simulated wellbore.

8. The intelligent drilling and completion simulation experimental system according to claim 4, characterized in that, Each of the two adjacent simulated wellbore joint ends is equipped with two sets of outer sealing sleeves and inner sealing sleeves. A sealing gap is reserved between the outer sealing sleeve and the inner sealing sleeve, and the outer sealing ring is embedded and clamped in the sealing gap on both sides.

9. The intelligent drilling and completion simulation experimental system according to claim 4, characterized in that, The outer sealing ring has a first hollow cavity, and the inner sealing ring has a second hollow cavity that matches its contour. The outer wall of the inner sealing ring is in contact with the inner wall of the inner sealing sleeve.

10. The intelligent drilling and completion simulation experimental system according to claim 4, characterized in that, An extrusion plate is installed on the outer side of the outer sealing sleeve. A third adjustment knob is passed through the extrusion plate. The third adjustment knob passes through the extrusion plate, the outer sealing sleeve, the inner sealing sleeve, and the outer sealing ring in sequence to achieve overall compression and fixation.

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