A drilling mechanism

Abstract

The present application provides a drilling mechanism, which is arranged on a transport device through a frame, and an outer drilling tower is rotatably connected to the frame to realize the transportation of the frame and the outer drilling tower. At the same time, a retractable supporting device is provided on the frame to support the ground when extended; the outer drilling tower is used to rotate to the side of the frame when the supporting device is supported on the ground, so as to approach the plane to be drilled; a grabbing device is arranged on the outer drilling tower, and an inner drilling tower is movably arranged in the outer drilling tower, a first power head is arranged at the first end of the inner drilling tower, and a straightening and locking device and a second power head are arranged at the second end of the inner drilling tower. The first power head, the grabbing device and the straightening and locking device cooperate to realize the first power head drilling mode, and the first power head and the second power head cooperate to realize the double power head and pipe following drilling mode. Compared with the traditional single drilling method, it meets the drilling needs of different strata and different engineering projects, is suitable for complex geological conditions, and enhances the flexibility and adaptability of drilling operations.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly to a drilling mechanism. Background Art

[0002] With the continuous innovation of drilling technology, the iteration cycle of drilling equipment has been significantly shortened, and it is moving towards a higher degree of integration, modularization, and intelligentization. This series of technological leaps not only greatly enriches the drilling means but also significantly improves the efficiency and accuracy of drilling operations. At the same time, with the increasing demand for deep resource exploration, drilling technology pays more attention to environmental adaptability, cost control, and automation and intelligentization of the operation process to meet the urgent needs of the industry for efficient, safe, and sustainable exploration.

[0003] Although the existing drill tower technology plays an indispensable role in geological exploration operations, there are still problems of functional limitations and lack of flexibility. Most drill towers are designed for specific drilling purposes and are difficult to adapt to changing geological conditions and diverse exploration needs. This not only restricts the operation ability of the drill tower in complex terrains or special geological structures but also requires frequent replacement or adjustment of equipment during drilling, increasing costs and time consumption and affecting the overall exploration flexibility and response speed. Summary of the Invention

[0004] In order to overcome the defects of the above-mentioned prior art, the present application provides a drilling mechanism.

[0005] The specific technical solution is as follows:

[0006] A drilling mechanism includes a frame, a transportation device, an outer drill tower, an inner drill tower, a grasping device, and a feeding system. The frame is arranged on the transportation device, the outer drill tower is rotatably connected to the frame, and the transportation device is used to drive the frame and the outer drill tower to move when the outer drill tower rotates above the frame.

[0007] The frame is provided with a telescopic support device for supporting the ground when extended; the outer drill tower is used to rotate to the side of the frame and be perpendicular to the plane to be drilled when the support device supports on the ground.

[0008] The gripping device is arranged on the outer drill tower and is used to drive and grip the first drill pipe to be connected when the outer drill tower approaches the plane to be drilled; the inner drill tower is movably arranged in the outer drill tower, a first power head is arranged at the first end of the inner drill tower, and the first power head is configured to dock with the first drill pipe to be connected gripped by the gripping device; a centering and locking device is rotatably arranged at the second end of the inner drill tower, and the centering and locking device is used to center the first drill pipe to be connected and lock the first drill pipe to be connected with the first previously drilled pipe on the plane to be drilled; the feeding system is used to drive the first power head to drive the first drill pipe to be connected to drill downward when the first drill pipe to be connected is locked with the first previously drilled pipe.

[0009] The first power head is further configured to dock with an external second drill pipe to be connected, a second power head is movably arranged at the second end of the inner drill tower, and the second power head is used to lock the second drill pipe to be connected with the second previously drilled pipe on the plane to be drilled; the feeding system is further used to drive the first power head and the second power head to drive the second drill pipe to be connected to drill downward when the second drill pipe to be connected is locked with the second previously drilled pipe.

[0010] In a specific embodiment, the first power head includes a first seat body, a first adjusting device and a first connecting assembly, the first seat body is arranged at the first end of the inner drill tower, and the first connecting assembly is rotatably connected to the first seat body; the first adjusting device is arranged on the first seat body in a liftable manner and is connected to the first connecting assembly, and is used to drive the first connecting assembly to switch between a first docking position and a second docking position when lifting.

[0011] The first connecting assembly includes a drill pipe connector and a casing connector, the drill pipe connector passes through the casing connector and faces the plane to be drilled, and there is a preset height between the bottom of the drill pipe connector and the bottom of the casing connector, and the preset height is between 5 cm and 100 cm.

[0012] The first drill pipe to be connected includes a first drill pipe to be connected, the second drill pipe to be connected includes a second drill pipe to be connected and a casing to be connected, the second drill pipe to be connected is arranged in the casing to be connected, and the end of the second drill pipe to be connected exposes the casing to be connected; the first connecting assembly is configured to make the drill pipe connector dock with the first drill pipe to be connected at the first docking position; and make the drill pipe connector dock with the second drill pipe to be connected and make the casing connector dock with the casing to be connected at the second docking position.

[0013] In a specific embodiment, the second power head includes a second base body and a second adjusting device. The second base body is arranged on the inner drill tower, and the second adjusting device is respectively connected to the inner drill tower and the second base body, and is used to drive the second base body to move relative to the inner drill tower so as to approach or move away from the plane to be drilled;

[0014] The second base body is provided with a through hole for the prior casing to pass through. On one side of the second base body close to the first power head, a pad fork device is provided. The pad fork device has an opening, and the opening is used to clamp the second prior drill pipe;

[0015] The first connection assembly is connected to the inner drill tower through the first base body, and is used to drive the second drill pipe to be connected on the first connection assembly to contact the second prior drill pipe and drive the casing to be connected on the first connection assembly to contact the prior casing when the inner drill tower moves;

[0016] When the second drill pipe to be connected contacts the second prior drill pipe, the drilling system is used to drive the drill pipe connector to rotate so as to lock the second drill pipe to be connected and the second prior drill pipe, and when the casing to be connected contacts the prior casing, the drilling system is used to drive the casing connector to rotate so as to lock the casing to be connected and the prior casing, and then drill downward after locking.

[0017] In a specific embodiment, the grasping device includes a grasping part and a flipping part which are connected. The grasping part has at least one grasping end for grasping the first drill pipe to be connected, and the flipping part is used to drive the grasping part to switch between a grasping position and a delivering position so that the grasping end grasps the first drill pipe to be connected at the grasping position;

[0018] When the grasping part is at the delivering position, the drill pipe connector is used to move to the first docking position to dock with the end of the first drill pipe to be connected on the grasping part;

[0019] The straightening and locking device includes a straightening assembly and a tightening assembly. The straightening assembly is arranged on the side of the tightening assembly far from the plane to be drilled and is used to straighten the first drill pipe to be connected; the tightening assembly is used to clamp and tighten the first drill pipe to be connected and the first prior drill pipe after the first drill pipe to be connected is straightened;

[0020] When the first drill pipe to be connected is locked with the prior drill pipe, the drilling system is used to drive the drill pipe connector and the casing connector to drill downward.

[0021] In a specific embodiment, the tightening assembly includes a main clamp, a back clamp, and a tightening oil cylinder. The back clamp is closer to the plane to be drilled than the main clamp. The back clamp is used to clamp the end of the first previously drilled drill pipe, and the main clamp is used to clamp the tail of the first drill pipe to be connected.

[0022] The tightening oil cylinder is connected to the main clamp and is used to drive the first drill pipe to be connected to rotate when the main clamp clamps the first drill pipe to be connected, so that the first drill pipe to be connected is locked with the first previously drilled drill pipe.

[0023] In a specific embodiment, the centering assembly includes a first centering member and a second centering member. The first centering member is located on the side of the main clamp away from the back clamp and faces the jaws of the main clamp, and is used to center the first drill pipe to be connected on the main clamp for the first time.

[0024] The second centering member is farther away from the main clamp than the first centering member and is used to center the first drill pipe to be connected on the main clamp for the second time.

[0025] In a specific embodiment, the second centering member includes a first fitting portion and a second fitting portion. The first fitting portion and the second fitting portion are connected to form a preset angle, and elastic pads are provided on the sides of the first fitting portion and the second fitting portion facing each other.

[0026] A preset angle is formed between the first fitting portion and the second fitting portion, and the preset angle is between 40° and 60°; or an angle adjusting member is provided between the first fitting portion and the second fitting portion, and the first fitting portion and the second fitting portion are connected by the angle adjusting member, and the angle adjusting member is used to adjust the opening angle between the first fitting portion and the second fitting portion.

[0027] In a specific embodiment, an electric control system is further included. The electric control system is arranged on the frame and is electrically connected to the support device and the transportation device.

[0028] A lifting device is provided between the frame and the outer drill tower. The lifting device is respectively connected to the frame and the outer drill tower and is used to rotate the outer drill tower above the frame and tilt it relative to the frame, or rotate the outer drill tower to the side of the frame.

[0029] In a specific embodiment, the inner drill tower has a first side and a second side, and the second power head is detachably arranged on the first side; a rotating member is provided between the centering and locking device and the outer drill tower, and the centering and locking device is connected to the outer drill tower through the rotating member and is used to rotate relative to the outer drill tower to switch between the first side and the second side.

[0030] In a specific embodiment, the sleeve connector is provided with a detachable fastener, and the sleeve connector is connected to the sleeve to be connected via the fastener; or the inner wall of the sleeve connector is provided with a threaded structure for connecting to the sleeve to be connected.

[0031] This application has at least the following beneficial effects:

[0032] The present application proposes a drilling mechanism, including a frame, a transport device, an outer drilling tower, an inner drilling tower, a grabbing device and a feeding system. The frame is arranged on the transport device, and the outer drilling tower is rotatably connected to the frame. The transport device is used to drive the frame and the outer drilling tower to move when the outer drilling tower rotates to the top of the frame; a retractable supporting device is provided on the frame to support the ground when extended; the outer drilling tower is used to rotate to the side of the frame and be perpendicular to the plane to be drilled when the supporting device is supported on the ground; the grabbing device is arranged on the outer drilling tower, and is used to drive the outer drilling tower to grab the first drilling tool to be connected when it is close to the plane to be drilled; the inner drilling tower is movably arranged in the outer drilling tower, and a first power head is provided at the first end of the inner drilling tower, and the first power head is configured to dock with the grabbing device The first drill tool to be connected is grasped; the second end of the inner drilling tower is rotatably provided with a straightening and locking device, which is used to straighten the first drill tool to be connected and lock the first drill tool to be connected with the first previous drill tool on the plane to be drilled; the feeding system is used to drive the first power head to drive the first drill tool to be connected to drill downward when the first drill tool to be connected is locked with the first previous drill tool; the first power head is also configured to dock with the second external drill tool to be connected, and the second end of the inner drilling tower is also movably provided with a second power head, which is used to lock the second drill tool to be connected with the second previous drill tool on the plane to be drilled; the feeding system is also used to drive the first power head and the second power head to drive the second drill tool to be connected to drill downward when the second drill tool to be connected is locked with the second previous drill tool. This application realizes the transportation of the inner drilling tower to quickly reach the plane to be drilled through the cooperation between the transport device, the frame, the outer drilling tower, the support device and the inner drilling tower, and the first power head and the second power head are both set on the inner drilling tower, and the inner drilling tower drives the first power head and the second power head to move up and down. This design makes the drilling mechanism compact and easy to operate, and enhances the stability and accuracy during the drilling process. Further, according to the drilling requirements of different strata and different engineering projects, this application provides two drilling methods, namely, drill rod drilling (first power head drilling mode) and drill rod and casing drilling at the same time (dual power head and pipe drilling mode). Compared with the traditional method of relying only on drill rod drilling, the drilling cycle is greatly shortened, the cost is reduced, and the safety and efficiency of the drilling operation are improved. In addition, the presence of casing improves the well control condition. This technology is particularly suitable for complex geological conditions, such as loose strata and quicksand layers, and can effectively prevent the collapse of the hole wall and improve the drilling efficiency. It can be seen that the combined application of the two drilling modes not only enhances the flexibility and adaptability of drilling operations, but also significantly improves the efficiency and safety of resource exploration.

[0033] Furthermore, the first power head includes a first base body, a first adjusting device, and a first connecting component. The first base body is disposed at the first end of the inner drill tower, and the first connecting component is rotatably connected to the first base body. The first adjusting device is vertically movably disposed on the first base body and connected to the first connecting component, and is configured to drive the first connecting component to switch between a first docking position and a second docking position during lifting. The first connecting component includes a drill pipe connector and a casing connector. The drill pipe connector passes through the casing connector and faces the plane to be drilled, and there is a preset height between the bottom of the drill pipe connector and the bottom of the casing connector, and the preset height is between 5 cm and 100 cm. The first drill pipe to be connected includes a first drill pipe to be connected, and the second drill pipe to be connected includes a second drill pipe to be connected and a casing to be connected. The second drill pipe to be connected is disposed inside the casing to be connected, and the end of the second drill pipe to be connected protrudes from the casing to be connected. The first connecting component is configured to dock the drill pipe connector with the first drill pipe to be connected at the first docking position, and to dock the drill pipe connector with the second drill pipe to be connected and dock the casing connector with the casing to be connected at the second docking position. Based on the method provided in this application for simultaneous drilling of drill pipes and casings, the structure of the first power head is specially designed in this application. Through the cooperation of the first base body, the first adjusting device, and the first connecting component, the drill pipe connector and the casing connector can be flexibly switched between the first docking position and the second docking position, thereby meeting the requirements of different drilling modes. At the first docking position, the drill pipe connector can smoothly dock with the first drill pipe to be connected to perform traditional drill pipe drilling operations. At the second docking position, while the drill pipe connector docks with the second drill pipe to be connected, the casing connector can also dock with the casing to be connected, realizing double power head pipe-following drilling, which greatly improves the flexibility and efficiency of the drilling operation. Further, the height difference between the bottom of the drill pipe connector and the bottom of the casing connector in this application is between 5 cm and 100 cm, ensuring a reasonable space between the drill pipe connector and the casing connector, enabling better connection of the casing to be connected and the second drill pipe to be connected, and enabling the tail of the second drill pipe to be connected to protrude from the tail of the casing to be connected, so as to facilitate the subsequent docking of the tail of the second drill pipe to be connected with the end of the second previously drilled drill pipe.

[0034] Furthermore, the second power head includes a second seat body and a second adjusting device, the second seat body is arranged on the inner drilling tower, the second adjusting device is respectively connected to the inner drilling tower and the second seat body, and is used to drive the second seat body to move relative to the inner drilling tower to approach or move away from the plane to be drilled; the second seat body is provided with a through hole for the previous casing to pass through, and the second seat body is provided with a fork device on a side close to the first power head, and the fork device has an opening, and the opening is used to clamp the second previous drill rod; the first connecting assembly is connected to the inner drilling tower through the first seat body, and is used to drive the second drill rod to be connected on the first connecting assembly to contact with the second previous drill rod, and drive the casing to be connected on the first connecting assembly to contact with the previous casing when the inner drilling tower moves; the drilling system is used to drive the drill rod connector to rotate when the second drill rod to be connected contacts the second previous drill rod, so as to lock the second drill rod to be connected and the second previous drill rod, and when the casing to be connected contacts the previous casing, drive the casing connector to rotate so as to lock the casing to be connected and the previous casing, and drill downward after locking. The present application drives the second seat body to move relative to the inner drilling tower through the second adjustment device, thereby more accurately adjusting the distance between the second power head and the plane to be drilled, ensuring that the second drill rod to be connected and the second previous drill rod, and the casing to be connected and the previous casing can be accurately connected during the drilling process. In addition, by providing a through hole for the previous casing to pass through, and then clamping the second previous drill rod passing through the previous casing through the pad fork device, the second drill rod to be connected and the second previous drill rod, and the casing to be connected and the previous casing can be better connected during the subsequent drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A first schematic diagram of a drilling mechanism provided in this embodiment;

[0037] Figure 2 A second schematic diagram of the drilling mechanism provided in this embodiment;

[0038] Figure 3 A third schematic diagram of the drilling mechanism provided in this embodiment;

[0039] Figure 4 A schematic diagram of the structure of the righting and locking device provided in this embodiment;

[0040] Figure 5 A schematic diagram of the structure of the grabbing device provided in this embodiment;

[0041] Figure 6A schematic diagram of the structure of the first power head provided in this embodiment;

[0042] Figure 7 A schematic diagram of the structure of the second power head provided in this embodiment;

[0043] Figure 8 A schematic diagram of the modules of the feeding system, the first power head and the second power head provided in this embodiment.

[0044] Reference numerals:

[0045] 1-frame; 2-external drilling tower; 3-transportation device; 4-inner drilling tower; 5-grabbing device; 6-feeding system; 7-rightening and locking device; 8-first power head; 9-second power head; 10-support device; 11-electric control system; 12-lifting device; 13-first drilling tool to be connected; 14-second drilling tool to be connected;

[0046] 401 - first side; 402 - second side; 403 - first end; 404 - second end;

[0047] 501-grasping part; 502-turning part;

[0048] 701- tightening assembly; 702- straightening assembly; 703- rotating part;

[0049] 7011-back-up clamp; 7012-main clamp; 7013-tightening cylinder;

[0050] 70121- Jaws;

[0051] 7021-second righting piece; 7022-first righting piece;

[0052] 70211-first laminating portion; 70212-second laminating portion;

[0053] 801-first seat body; 802-first adjustment device; 803-first connecting assembly;

[0054] 8031-drill pipe connector; 8032-casing connector;

[0055] 901 second seat body; 902- second adjustment device; 903- limiting structure;

[0056] 9031-through hole; 9032-fork device. DETAILED DESCRIPTION

[0057] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0058] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0059] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0060] As Figure 1 、 2 、shown in 8, a drilling mechanism includes a frame 1, an outer drill tower 2, a transportation device 3, an inner drill tower 4, a grasping device 5, and a feeding system 6. The frame 1 is arranged on the transportation device 3, and the outer drill tower 2 is rotatably connected to the frame 1. The transportation device 3 is used to drive the frame 1 and the outer drill tower 2 to move when the outer drill tower 2 rotates to the upper part of the frame 1.

[0061] A telescopic support device 10 is provided on the frame 1 for supporting the ground when extended. The outer drill tower 2 is used to rotate to the side of the frame 1 and be perpendicular to the plane to be drilled when the support device 10 supports on the ground.

[0062] The grabbing device 5 is arranged on the outer drilling tower 2, and is used to drive the outer drilling tower 2 to grab the first drilling tool 13 to be connected when it is close to the plane to be drilled (not shown in the figure); the inner drilling tower 4 is movably arranged in the outer drilling tower 2, and the first end 403 of the inner drilling tower 4 is provided with a first power head 8, and the first power head 8 is configured to dock the first drilling tool 13 to be connected grabbed by the grabbing device 5; the second end 404 of the inner drilling tower 4 is rotatably provided with a straightening and locking device 7, and the straightening and locking device 7 is used to straighten the first drilling tool 13 to be connected and lock the first drilling tool 13 to be connected with the first previous drilling tool of the plane to be drilled; the feeding system 6 is used to drive the first power head 8 to drive the first drilling tool 13 to be connected to drill downward when the first drilling tool 13 to be connected is locked with the first previous drilling tool;

[0063] The first power head 8 is also configured to dock with an external second drill tool 14 to be connected. The second end 404 of the inner drilling tower 4 is also movably provided with a second power head 9, and the second power head 9 is used to lock the second drill tool 14 to be connected with the second prior drill tool on the plane to be drilled; the feeding system 6 is also used to drive the first power head 8 and the second power head 9 to drive the second drill tool 14 to be connected to drill downward when the second drill tool 14 to be connected is locked with the second prior drill tool.

[0064] The present application realizes the transportation of the inner drilling tower 4 to reach the plane to be drilled through the cooperation between the transport device 3, the frame 1, the outer drilling tower 2, the support device 10 and the inner drilling tower 4, and the first power head and the second power head are both arranged on the inner drilling tower 4, and the inner drilling tower 4 drives the first power head and the second power head to move up and down. This design makes the drilling mechanism compact and easy to operate, and enhances the stability and precision during the drilling process. Further, the present application provides two drilling modes according to the drilling requirements of different strata and different engineering projects, namely, drill rod drilling (first power head 8 drilling mode) and drill rod and casing drilling at the same time (dual power head and pipe drilling mode). Compared with the traditional method of relying only on drill rod drilling, the drilling cycle is greatly shortened, the cost is reduced, and the safety and efficiency of the drilling operation are improved. In addition, the presence of the casing improves the well control condition. This technology is particularly suitable for complex geological conditions, such as loose strata and quicksand layers, and can effectively prevent the collapse of the hole wall and improve the drilling efficiency. It can be seen that the combined application of the two drilling modes not only enhances the flexibility and adaptability of drilling operations, but also significantly improves the efficiency and safety of resource exploration.

[0065] The plane to be drilled is the ground on which the first prior drilling tool and the second prior drilling tool are pre-installed.

[0066] like Figure 1 , 2, as shown in FIGS. 6, the first power head 8 includes a first base body 801, a first adjusting device 802 and a first connecting assembly 803. The first base body 801 is arranged at the first end 403 of the inner drill tower 4; the first adjusting device 802 is arranged on the first base body 801 and connected to the first connecting assembly 803, and is used to drive the first connecting assembly 803 to switch between a first docking position and a second docking position;

[0067] The first connecting assembly 803 includes a drill pipe connector 8031 and a casing connector 8032. The drill pipe connector 8031 passes through the casing connector 8032 and faces the plane to be drilled, and there is a preset height between the bottom of the drill pipe connector 8031 and the bottom of the casing connector 8032, and the preset height is between 5 cm and 100 cm;

[0068] The first drill tool to be connected 13 includes a first drill pipe to be connected, the second drill tool to be connected 14 includes a second drill pipe to be connected and a casing to be connected. The second drill pipe to be connected is arranged inside the casing to be connected, and the end of the second drill pipe to be connected exposes the casing to be connected; the first connecting assembly 803 is configured to make the drill pipe connector 8031 dock with the first drill pipe to be connected at the first docking position; and make the drill pipe connector 8031 dock with the second drill pipe to be connected and make the casing connector 8032 dock with the casing to be connected at the second docking position.

[0069] In this embodiment, the first adjusting device 802 is an oil cylinder. The oil cylinder moves downward to push the first connecting assembly 803 to rotate relative to the first base body 801, so as to realize the tilting of the first connecting assembly 803.

[0070] Based on the method provided in this application for simultaneous drilling of drill pipes and casings, the structure of the first power head 8 is specially designed in this application. Through the cooperation of the first base body 801, the first adjusting device 802 and the first connecting assembly 803, the drill pipe connector 8031 and the casing connector 8032 can be flexibly switched between the first docking position and the second docking position, thus meeting the requirements of different drilling modes. At the first docking position, the drill pipe connector 8031 can smoothly dock with the first drill pipe to be connected for traditional drill pipe drilling operations; while at the second docking position, when the drill pipe connector 8031 docks with the second drill pipe to be connected, the casing connector 8032 can also dock with the casing to be connected to realize double power head pipe-following drilling, greatly improving the flexibility and efficiency of the drilling operation. Further, the height difference between the bottom of the drill pipe connector 8031 and the bottom of the casing connector 8032 in this application is between 5 cm and 100 cm, ensuring a reasonable space between the drill pipe connector 8031 and the casing connector 8032, enabling better connection of the casing to be connected and the second drill pipe to be connected, and making the tail of the second drill pipe to be connected expose the tail of the casing to be connected, so as to facilitate the subsequent docking of the tail of the second drill pipe to be connected with the end of the second previously drilled drill pipe.

[0071] In this embodiment, the casing connector 8032 and the first housing 801 are detachably connected. During traditional drill pipe drilling operations, the casing connector 8032 can be removed from the first housing 801, and the first connection assembly 803 (drill pipe connector 8031) is switched to the first docking position so that the drill pipe connector 8031 can successfully dock with the first drill pipe to be connected. During double-rotary-head pipe-following drilling, the casing connector 8032 is reinstalled on the first housing 801, and the first connection assembly 803 (drill pipe connector 8031, casing connector 8032) is switched to the second docking position. While the drill pipe connector 8031 docks with the second drill pipe to be connected, the casing connector 8032 can also dock with the casing to be connected.

[0072] Among them, the structures of the first drill pipe to be connected and the second drill pipe to be connected are the same, and the lengths of the second drill pipe to be connected and the casing to be connected are the same. In one embodiment, the lengths of the second drill pipe to be connected and the casing to be connected are both 6 m.

[0073] As Figure 1 、 2 、6, and 7 show, the second rotary head 9 includes a second housing 901 and a second adjusting device 902. The second housing 901 is arranged on the inner drill tower 4. The second adjusting device 902 is respectively connected to the inner drill tower 4 and the second housing 901 and is used to drive the second housing 901 to move relative to the inner drill tower 4 to approach or move away from the plane to be drilled;

[0074] The second housing 901 has a through hole 9031 for the prior casing to pass through. On the side of the second housing 902 close to the first rotary head 8, there is a pad fork device 9032. The pad fork device 9032 has an opening for clamping the second prior drill pipe;

[0075] The first connection assembly 803 is connected to the inner drill tower 4 through the first housing 801 and is used to drive the second drill pipe to be connected on the first connection assembly 803 to contact the second prior drill pipe when the inner drill tower 4 moves, and drive the casing to be connected on the first connection assembly 803 to contact the prior casing;

[0076] The drilling system is used to drive the drill pipe connector 8031 to rotate to lock the second drill pipe to be connected and the second prior drill pipe when the second drill pipe to be connected contacts the second prior drill pipe, and drive the casing connector 8032 to rotate to lock the casing to be connected and the prior casing when the casing to be connected contacts the prior casing, and drill downward after locking.

[0077] In this application, the second adjusting device 902 drives the second seat body 901 to move relative to the inner drill tower 4, so as to more precisely adjust the distance between the second power head 9 and the plane to be drilled. Moreover, by providing a through hole 9031 for the prior casing to pass through, and then clamping the second prior drill pipe passing out of the prior casing through the pad fork device 9032, it is convenient for the second drill pipe to be connected and the second prior drill pipe, and the casing to be connected and the prior casing to be accurately docked during subsequent drilling.

[0078] In this embodiment, the through hole 9031 is provided in the middle of the second seat body 901, and the pad fork device 9032 is telescopically arranged on one side of the second seat body 901 facing the first power head 8, and is used to clamp the second prior drill pipe when extending, and retract when the second drill pipe to be connected is locked with the second prior drill pipe.

[0079] As Figure 1 、 2 As shown in FIGS. 4, 5, and 8, the grasping device 5 includes a connected grasping part 501 and a flipping part 502. The grasping part 501 has at least one grasping end for grasping the first drill pipe to be connected, and the flipping part 502 is used to drive the grasping part 501 to switch between the grasping position and the delivering position, so that the grasping end grasps the first drill pipe to be connected at the grasping position;

[0080] The drill pipe connector 8031 is used to move to the first docking position to dock with the end of the first drill pipe to be connected on the grasping part 501 when the grasping part 501 is in the delivering position;

[0081] The centering and locking device 7 includes a tightening assembly 701 and a centering assembly 702. The centering assembly 702 is arranged on the side of the tightening assembly 701 away from the plane to be drilled, and is used to center the first drill pipe to be connected; the tightening assembly 701 is used to clamp and tighten the first drill pipe to be connected and the first prior drill pipe after the first drill pipe to be connected is centered;

[0082] When the drilling system is used for locking the first drill pipe to be connected and the prior drill pipe, it drives the drill pipe connector 8031 and the casing connector 8032 to drill downward.

[0083] With the combined action of the grasping part 501, the flipping part 502 and the drill pipe connector 8031 in this application, the efficient grasping and precise delivery of the first drill pipe to be connected are realized. The whole process is mechanized and automated without manual intervention, which not only simplifies the operation process, but also significantly improves the operation efficiency. Further, through the combined cooperation of the tightening assembly 701 and the centering assembly 702 in the centering and locking device 7, the alignment between the first drill pipe to be connected and the first prior drill pipe is realized, ensuring the tight locking between the first drill pipe to be connected and the first prior drill pipe, thereby improving the stability of the first drill pipe to be connected and the first prior drill pipe during drilling.

[0084] As Figure 4As shown, specifically, the tightening assembly 701 includes a back clamp 7011, a main clamp 7012, and a tightening oil cylinder 7013. The back clamp 7011 is closer to the plane to be drilled than the main clamp 7012. The back clamp 7011 is used to clamp the end of the first previously drilled drill pipe, and the main clamp 7012 is used to clamp the tail of the first drill pipe to be connected.

[0085] The tightening oil cylinder 7013 is connected to the main clamp 7012 and is used to drive the first drill pipe to be connected to rotate when the main clamp 7012 clamps the first drill pipe to be connected, so that the first drill pipe to be connected is locked with the first previously drilled drill pipe.

[0086] After the centralizing assembly 702 of the present application centralizes the first drill pipe to be connected, the main clamp 7012 clamps the tail of the first drill pipe to be connected, and the tightening oil cylinder 7013 drives the main clamp 7012 to rotate so that the first drill pipe to be connected is locked with the first previously drilled drill pipe. This design not only simplifies the locking process, improves the operation efficiency, but also ensures the firmness and reliability of the drill pipe connection, effectively avoiding potential safety hazards caused by loose connection.

[0087] Specifically, as Figure 4 shown, the centralizing assembly 702 includes a first centralizing member 7022 and a second centralizing member 7021. The first centralizing member 7022 is located on the side of the main clamp 7012 away from the back clamp 7011 and faces the jaw 70121 of the main clamp 7012, and is used to centrally position the first drill pipe to be connected on the main clamp 7012 for the first time; the second centralizing member 7021 is farther away from the main clamp 7012 than the first centralizing member 7022, and is used to centrally position the first drill pipe to be connected on the main clamp 7012 for the second time. In the present application, the first drill pipe to be connected is centrally positioned multiple times by the first centralizing member 7022 and the second centralizing member 7021, so that the first drill pipe to be connected can be better docked with the first previously drilled drill pipe, improving the firmness and reliability of the drill pipe connection.

[0088] As Figures 1-8 shown, the second centralizing member 7021 includes a first fitting portion 70211 and a second fitting portion 70212. The first fitting portion 70211 and the second fitting portion 70212 are connected to form a preset angle, and elastic pads are provided on the sides of the first fitting portion 70211 and the second fitting portion 70212 facing each other.

[0089] A preset angle is formed between the first fitting portion 70211 and the second fitting portion 70212, and the preset angle is between 40° and 60°; or an angle adjusting member is provided between the first fitting portion 70211 and the second fitting portion 70212, and the first fitting portion 70211 and the second fitting portion 70212 are connected by the angle adjusting member, and the angle adjusting member is used to adjust the opening angle between the first fitting portion 70211 and the second fitting portion 70212.

[0090] In the present application, the first fitting portion 70211 and the second fitting portion 70212 are connected to form a preset included angle, enabling the second centering member 7021 to closely fit the surface of the first drill pipe to be connected, thereby improving the centering effect. Moreover, by providing elastic pads on both the first fitting portion 70211 and the second fitting portion 70212, the friction between the first drill pipe to be connected and the fitting portion is effectively reduced, and the wear of the equipment is decreased. Further, the present application also provides two implementation manners for connecting the first fitting portion 70211 and the second fitting portion 70212. In one embodiment, the first fitting portion 70211 and the second fitting portion 70212 are integrally formed to form a preset included angle, and the preset angle is between 40° and 60°. The selection of this range not only ensures good support of the centering assembly 702 for the drill pipe but also avoids inconvenient operation caused by an excessive angle. In addition, in another embodiment, when the centering assembly 702 uses an angle adjusting member to connect the first fitting portion 70211 and the second fitting portion 70212, the opening angle between the two can be flexibly adjusted to adapt to drill pipes with different diameters or under different drilling conditions, further enhancing the applicability and flexibility of the centering assembly 702.

[0091] As Figures 1-8 shown, the drilling mechanism of the present application further includes an electric control system 11, which is arranged on the frame 1 and electrically connected to the support device 10 and the transportation device 3;

[0092] There is a lifting device 12 between the frame 1 and the outer drill tower 2. The lifting device 12 is respectively connected to the frame 1 and the outer drill tower 2 and is used to rotate the outer drill tower 2 above the frame 1 and incline it relative to the frame 1, or rotate the outer drill tower 2 to the side of the frame 1 and make it perpendicular to the plane to be drilled.

[0093] Among them, the electric control system 11 includes a control console, an electric control cabinet, etc.

[0094] By separately arranging the electric control system 11 and the drilling system on different frames in the drilling mechanism of the present application, the space allocation is made more reasonable. Moreover, there is a lifting device 12 between the frame 1 and the outer drill tower 2. The design of the lifting device 12 enables the outer drill tower 2 to flexibly switch between the inclined position above the frame 1 and the side position. This function not only facilitates the layout and adjustment of the drilling mechanism in different operating environments but also greatly improves the flexibility and adaptability of the equipment. For example, when it is necessary to cross an obstacle or perform special-angle drilling, the lifting device 12 can quickly adjust the position of the outer drill tower 2 to ensure the smooth progress of the drilling operation. In addition, the lifting device 12 also simplifies the transportation and storage process of the drilling mechanism, reducing the operation difficulty and cost.

[0095] As Figures 1-8As shown, the second power head 9 is detachably arranged on the inner drill tower 4. The inner drill tower 4 has a first side 401 and a second side 402. A rotating member 703 is provided between the centering and locking device 7 and the outer drill tower 2. The centering and locking device 7 is connected to the outer drill tower 2 through the rotating member 703 and is used to rotate relative to the outer drill tower 2 so as to switch between the first side 401 and the second side 402. In this application, by detachably arranging the second power head 9 on the inner drill tower 4, the drilling mechanism can quickly replace or adjust the power head according to different operation requirements, improving the versatility and flexibility of the equipment. Secondly, the centering and locking device 7 is connected to the outer drill tower 2 through the rotating member 703, realizing the rotating function relative to the outer drill tower 2, being located on the first side 401 during centering and locking and on the second side 402 when the power head is drilling.

[0096] A detachable fastener (not shown in the figure) is provided on the casing connector 8032. The casing connector 8032 is connected to the casing to be connected through the fastener; or a threaded structure (not shown in the figure) for connecting with the casing to be connected is provided on the inner wall of the casing connector 8032. The detachable connection between the casing connector 8032 and the casing to be connected is realized through the fastener or the threaded structure, with a simple structure and enhanced versatility and flexibility of the equipment.

[0097] Among them, the fastener can be one of a screw, a bolt, and a bolt pin.

[0098] Note that the above is only a preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments here, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments only. Without departing from the concept of the present application, more other equivalent embodiments can be included, and the scope of the present application is determined by the scope of the appended claims.

[0099] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drilling mechanism, characterized in that: It comprises a frame, a transport device, an outer drilling tower, an inner drilling tower, a grabbing device and a feeding system, wherein the frame is arranged on the transport device, the outer drilling tower is rotatably connected to the frame, and the transport device is used for driving the frame and the outer drilling tower to move when the outer drilling tower rotates to the upper part of the frame; The frame is provided with a retractable support device for supporting the ground when extended; the outer drilling tower is used to rotate to the side of the frame and perpendicular to the plane to be drilled when the support device is supported on the ground; The grabbing device is arranged on the outer drilling tower, and is used for driving the outer drilling tower to grab the first drilling tool to be connected when the outer drilling tower approaches the plane to be drilled; the inner drilling tower is movably arranged in the outer drilling tower, and the first end of the inner drilling tower is provided with a first power head, and the first power head is configured to dock with the first drilling tool to be connected grabbed by the grabbing device; the second end of the inner drilling tower is rotatably provided with a straightening and locking device, and the straightening and locking device is used for straightening the first drilling tool to be connected and locking the first drilling tool to be connected with the first previous drilling tool of the plane to be drilled; the feeding system is used for driving the first power head to drive the first drilling tool to be connected to drill downward when the first drilling tool to be connected is locked with the first previous drilling tool; The first power head is also configured to dock with an external second drill tool to be connected, and the second end of the inner drilling tower is also movably provided with a second power head, and the second power head is used to lock the second drill tool to be connected with the second previous drill tool of the plane to be drilled; the feeding system is also used to drive the first power head and the second power head to drive the second drill tool to be connected to drill downward when the second drill tool to be connected is locked with the second previous drill tool; The first power head includes a first seat body, a first adjustment device and a first connection assembly, wherein the first seat body is arranged at the first end of the inner drilling tower, and the first connection assembly is rotatably connected to the first seat body; the first adjustment device is liftably arranged on the first seat body and connected to the first connection assembly, and is used to drive the first connection assembly to switch between the first docking position and the second docking position during lifting; The first connection assembly includes a drill rod connector and a casing connector, the drill rod connector passes through the casing connector and faces the plane to be drilled, and there is a preset height between the bottom of the drill rod connector and the bottom of the casing connector, and the preset height is between 5 cm and 100 cm; The first drill tool to be connected includes a first drill rod to be connected, the second drill tool to be connected includes a second drill rod to be connected and a casing to be connected, the second drill rod to be connected is arranged in the casing to be connected, and the end of the second drill rod to be connected is exposed from the casing to be connected; the first connecting assembly is configured to make the drill rod connector dock with the first drill rod to be connected in the first docking position; and to make the drill rod connector dock with the second drill rod to be connected and the casing connector dock with the casing to be connected in the second docking position.

2. The drilling mechanism according to claim 1, characterized in that: The second power head includes a second seat body and a second adjustment device, the second seat body is arranged on the inner drilling tower, and the second adjustment device is respectively connected to the inner drilling tower and the second seat body, and is used to drive the second seat body to move relative to the inner drilling tower to approach or move away from the plane to be drilled; The second seat body has a through hole for the first casing to pass through, and the second seat body is provided with a pad fork device on a side close to the first power head, and the pad fork device has an opening, and the opening is used to clamp the second first drill rod; The first connecting assembly is connected to the inner drilling tower through the first seat body, and is used to drive the second drill rod to be connected on the first connecting assembly to contact with the second previous drill rod, and drive the casing to be connected on the first connecting assembly to contact with the previous casing when the inner drilling tower moves; The feeding system is used to drive the drill rod connector to rotate so as to lock the second drill rod to be connected and the second prior drill rod when the second drill rod to be connected contacts the second prior drill rod, and to drive the casing connector to rotate so as to lock the casing to be connected and the prior casing when the casing to be connected contacts the prior casing, and to drill downward after locking.

3. The drilling mechanism according to claim 1, characterized in that: The grabbing device comprises a grabbing portion and a flipping portion connected to each other, the grabbing portion having at least one grabbing end for grabbing the first drill rod to be connected, and the flipping portion is used to drive the grabbing portion to switch between a grabbing position and a delivery position, so that the grabbing end grabs the first drill rod to be connected at the grabbing position; The drill rod connector is used to move to the first docking position to dock the end of the first drill rod to be connected on the grabbing part when the grabbing part is at the delivery position; The straightening and locking device comprises a straightening assembly and a tightening assembly, wherein the straightening assembly is arranged on a side of the tightening assembly away from the plane to be drilled, and is used to straighten the first drill rod to be connected; the tightening assembly is used to clamp and tighten the first drill rod to be connected and the first preceding drill rod after the first drill rod to be connected is straightened; The feeding system is used to drive the drill rod connector and the casing connector to drill downward when the first drill rod to be connected is locked with the previous drill rod.

4. The drilling mechanism according to claim 3, characterized in that: The tightening assembly comprises a main tong, a backup tong and a tightening cylinder, wherein the backup tong is closer to the plane to be drilled than the main tong, the backup tong is used to clamp the end of the first preceding drill rod, and the main tong is used to clamp the tail of the first drill rod to be connected; The tightening oil cylinder is connected to the main tongs, and is used for driving the first drill rod to be connected to rotate when the main tongs clamp the first drill rod to be connected so as to lock the first drill rod to be connected with the first preceding drill rod.

5. The drilling mechanism according to claim 4, characterized in that: The straightening assembly comprises a first straightening member and a second straightening member, wherein the first straightening member is located at a side of the main tong away from the backup tong and faces the jaws of the main tong, and is used for straightening the first drill rod to be connected on the main tong. The second straightening member is further away from the main tongs than the first straightening member, and is used for second straightening the first drill rod to be connected on the main tongs.

6. The drilling mechanism according to claim 5, characterized in that: The second straightening member comprises a first fitting portion and a second fitting portion, the first fitting portion and the second fitting portion are connected to form a preset angle, and the first fitting portion and the second fitting portion both have elastic pads on one side facing each other; A preset angle is formed between the first fitting portion and the second fitting portion, and the preset angle is between 40° and 60°; or an angle adjustment member is provided between the first fitting portion and the second fitting portion, and the first fitting portion and the second fitting portion are connected via the angle adjustment member, and the angle adjustment member is used to adjust the opening angle between the first fitting portion and the second fitting portion.

7. The drilling mechanism according to claim 1, characterized in that: It also includes an electric control system, which is arranged on the frame and is electrically connected to the supporting device and the transporting device; A lifting device is provided between the frame and the outer drilling tower, and the lifting device is connected to the frame and the outer drilling tower respectively, and is used to rotate the outer drilling tower to the top of the frame and tilt it relative to the frame, or rotate the outer drilling tower to the side of the frame.

8. The drilling mechanism according to claim 1, characterized in that: The inner drilling tower has a first side and a second side, and the second power head is detachably arranged on the first side; a rotating member is provided between the straightening and locking device and the outer drilling tower, and the straightening and locking device is connected to the outer drilling tower through the rotating member, and is used to rotate relative to the outer drilling tower to switch between the first side and the second side.

9. The drilling mechanism according to claim 1, characterized in that: The sleeve connector is provided with a detachable fastener, and the sleeve connector is connected to the sleeve to be connected via the fastener; or the inner wall of the sleeve connector is provided with a threaded structure for connecting to the sleeve to be connected.

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