Water braid device and method for self-disassembly of drill pipe

Abstract

The invention relates to a water braid device and method for self-dismounting a drill rod, and belongs to the field of drilling engineering. The device comprises a water braid, a clutch oil cylinder, an end cover, a connecting rod and a clutch assembly, the front end of a water braid shaft is meshed with an inner hole of a drill rod to transmit torque, the middle of the water braid shaft is matched with the clutch assembly to achieve power switching, and the rear end of the water braid shaft controls axial displacement; the clutch oil cylinder drives the load block of the clutch assembly to move through the synergistic effect of the inner oil cylinder and the outer oil cylinder so as to switch the rotating state or the static state of the water braid shaft. According to the method, oil is supplied to the clutch oil cylinder to drive the water braid shaft to be inserted into an inner cavity of the drill rod and complete meshing, and self-disassembly of the drill rod, disassembly of adjacent drill rods and threaded connection operation are achieved in combination with reverse rotation of the power head. Through integrated design, the drilling machine layout is simplified, and the automation level is improved; the design of meshing of the polygonal shaft and meshing of the clutch assembly ensures stable connection under the high-torque working condition, the hollow water braid shaft integrates the cooling liquid conveying function, and abrasion of an external pipeline is avoided; and the drilling efficiency, the equipment reliability and the operation intelligence degree are improved.

Description

Technical Field

[0001] The invention belongs to the field of drilling engineering and relates to a self-detachable drill pipe water braid device and method. Background Art

[0002] In the field of drilling engineering, the connection and disassembly technology of drill pipes has always been a core link that affects the work efficiency and automation level. At present, the traditional drill pipe connection generally adopts a male and female joint structure, relying on threads to achieve the extension of the drill pipe. In the prior art, there are mainly two typical modes: one is the structural design of the active drill pipe combined with a double clamp, which fixes the drill pipe through a double clamp to achieve connection. However, the structure is complex and the operation is cumbersome, especially during the disassembly process, the position of the clamp needs to be adjusted frequently, resulting in a significant reduction in the disassembly efficiency; the other adopts the method of combining a hydraulic chuck with a clamp. Although it simplifies the clamping action to a certain extent, the water braid device needs to be repeatedly disassembled and assembled every time a drill pipe is added or removed, making the entire process time-consuming and difficult to achieve automated operation. In addition, some improvement schemes try to use plug-in connections instead of threaded structures. Although the connection steps are simplified, they are limited by insufficient connection strength and can only adapt to drilling scenarios with low torque loads, and cannot meet high-load drilling requirements. In practical applications, the above technologies generally face problems such as complex connection processes, poor automation adaptability, and difficulty in balancing connection strength and efficiency, which seriously restrict the efficient and intelligent development of drilling equipment.

[0003] In this context, a new type of drill pipe connection and disassembly device is urgently needed, which can break through the bottleneck of existing technology and take into account structural simplification, efficient operation and high torque bearing capacity. The ideal technical solution needs to realize the automatic and rapid connection and disassembly of the drill pipe, avoid the dependence on complex clamping structure, and ensure stable connection under high pressure and high load conditions. In the prior art, although some literatures mention that the operation efficiency of the drill pipe can be improved by optimizing the water braid device or improving the clutch mechanism, its design is mostly limited to single function optimization, and fails to systematically solve comprehensive problems such as structural redundancy, cumbersome process and insufficient automation adaptability. For example, although some devices try to simplify the operation through hydraulic drive, they still need to rely on multi-step manual intervention; although other solutions introduce sliding engagement structure, they do not effectively coordinate the power transmission and sealing requirements between the water braid and the drill pipe, resulting in limited practicality. Therefore, the development of an integrated and highly reliable drill pipe water braid device has become a key technical direction to improve the automation level and operation efficiency of drilling equipment. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a self-detachable drill pipe water braid device and method, which simplifies the drill pipe disassembly and connection process through integrated design, combines hydraulic drive and mechanical linkage control to achieve automated operation; at the same time, through the polygonal meshing structure and hollow water braid shaft design, takes into account high torque bearing and coolant delivery functions, and significantly improves drilling efficiency and equipment reliability.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a self-detachable drill pipe water braid device, comprising a water braid, a clutch oil cylinder, an end cover, a connecting rod and a clutch assembly. The water braid consists of a water inlet sleeve, a fixing ring, a water braid body and a water braid shaft. The water inlet sleeve is arranged at the end of the water braid and fixed on the water braid body through a fixing ring; the water braid body is slidably connected with the piston inner cavity of the clutch oil cylinder; the water braid shaft is a hollow structure, the front end of which cooperates with the drill pipe, the middle part is meshed with the clutch block of the clutch assembly, and the rear end is fixed in the water braid body. The clutch oil cylinder comprises an inner cylinder and an outer cylinder, the inner cylinder is connected to the water braid housing, and the outer cylinder is connected to the load block of the clutch assembly through a connecting rod. The clutch assembly comprises a load block, a slider, a fixing frame, a bearing and a clutch block, the clutch block is connected to the end cover through the fixing frame, the interior of the clutch block is meshed with the middle section of the water braid shaft, and the load block cooperates with the meshing teeth of the clutch block through the slider to achieve circumferential fixation and axial sliding. The clutch cylinder drives the load block to move, controls the meshing state of the clutch block and the power head main shaft or end cover, and switches the water braid shaft to rotate or stop.

[0007] Optionally, the water braid body is slidably connected to the piston inner cavity of the clutch cylinder through a sealing ring.

[0008] Optionally, a polygonal shaft is provided at the front end of the water braid shaft to match the polygonal inner hole at the rear end of the drill pipe.

[0009] Optionally, a polygonal shaft section is provided in the middle of the water braid shaft for engaging with a clutch block of the clutch assembly.

[0010] Optionally, the rear end of the water braid shaft is fixed in the water braid body through a flange and a bearing.

[0011] Optionally, a polygonal inner hole is provided inside the clutch block to engage with the middle section of the water braid shaft.

[0012] Optionally, the water hole of the water braid shaft runs through its axial direction and is used to transport coolant to the inner cavity of the drill pipe.

[0013] Optionally, the outer cylinder of the clutch cylinder includes an outer piston cylinder and an inner piston cylinder, which are tightly matched to form a sealed cavity and are connected to a connecting rod via a connecting block to drive the axial movement of the load block.

[0014] The present invention also provides a self-disassembly method for a drill pipe based on the above device, the method comprising the following steps:

[0015] Drill pipe self-disassembly steps:

[0016] a. Turn off the cooling water supply to the water pipe;

[0017] b. Supply oil to the right chamber of the inner cylinder of the clutch oil cylinder to drive the water braid shaft to insert into the inner chamber of the drill pipe and mesh with the polygonal inner hole at the rear end of the drill pipe; c. Supply oil to the right chamber of the outer cylinder of the clutch oil cylinder to drive the load block to slide, so that the clutch block meshes with the end cover and locks the circumferential movement of the water braid shaft;

[0018] d. Start the power head main shaft to reverse and drive the drill rod to separate from the active drill rod.

[0019] Adjacent drill pipe disassembly steps:

[0020] a. Turn off the cooling water supply to the water pipe;

[0021] b. Supply oil to the right chamber of the inner cylinder of the clutch cylinder to drive the water braid shaft to insert into the inner chamber of the adjacent drill pipe;

[0022] c. Supply oil to the left chamber of the outer cylinder of the clutch cylinder to drive the load block to slide, so that the clutch block engages with the main shaft of the power head, and the water braid shaft rotates synchronously with the main shaft;

[0023] d. Start the power head main shaft to reverse and drive the adjacent drill rods to detach.

[0024] Drill pipe connection steps:

[0025] The automatic connection of the drill rod is completed through the thread at the front end of the active drill rod.

[0026] Drilling status control steps:

[0027] Keep the clutch assembly load block disengaged and move the water braid shaft to the far right to reduce rotational wear.

[0028] Optionally, in the drill rod self-disassembly and adjacent drill rod disassembly steps, the engagement of the water braid shaft with the drill rod realizes circumferential torque transmission and axial sliding through the polygonal shaft.

[0029] The beneficial effects of the present invention are:

[0030] The self-detachable drill pipe water braid device provided by the present invention significantly improves the efficiency, automation and reliability of drilling operations through innovative structural design and functional integration, which is specifically reflected in the following technical advantages:

[0031] 1. The unity of simplified structure and efficient operation

[0032] Traditional drill pipe connection and removal devices rely on complex double clamps or hydraulic chuck systems, resulting in bulky equipment and cumbersome operation. This solution integrates coolant delivery, torque transmission, drill pipe locking and release functions into a single device through the collaborative design of the water braid shaft, clutch cylinder and clutch assembly. The polygonal shaft at the front end of the water braid shaft directly engages with the polygonal inner hole at the rear end of the drill pipe to achieve efficient transmission of circumferential torque and axial sliding freedom, and the drill pipe can be fixed without an additional clamping mechanism; the clutch assembly cooperates with the meshing teeth of the load block and the clutch block, and is driven by the clutch cylinder to switch the water braid shaft between rotation or static state. This design abandons the traditional multi-component step-by-step operation mode, greatly simplifies the mechanical structure, reduces the failure rate, and significantly shortens the process time of drill pipe connection and removal.

[0033] 2. High torque bearing and stable connection capability

[0034] Existing plug-in drill pipes are difficult to adapt to high-load drilling scenarios due to their insufficient connection strength. In this solution, the water braid shaft adopts a hollow polygonal shaft structure, and its front polygonal shaft is tightly engaged with the inner cavity of the drill pipe to ensure that the contact area is maximized during torque transmission and effectively improve the torsional strength; at the same time, the middle polygonal shaft section of the water braid shaft cooperates with the polygonal inner hole of the clutch block to further enhance the stability of power transmission. In addition, the clutch cylinder accurately adjusts the displacement of the load block through independent control of the inner and outer cylinders to ensure the tight engagement of the meshing teeth under high-pressure conditions to avoid slipping or disengagement. This design enables the device to withstand high-torque drilling loads while adapting to high-frequency vibrations and impacts under complex geological conditions.

[0035] 3.Automation adaptability and process optimization

[0036] Traditional drill pipe operation requires frequent disassembly of the water braid device or relies on manual intervention, which seriously restricts the level of automation. This solution realizes the full process automation of drill pipe connection, disassembly and drilling status through the linkage control of the hydraulic drive of the clutch cylinder and the main shaft of the power head. During the self-disassembly process of the drill pipe, the inner cylinder of the clutch cylinder drives the water braid shaft to insert into the inner cavity of the drill pipe and complete the engagement. The outer cylinder synchronously controls the locking of the clutch block and the end cover or the main shaft of the power head, and the separation action can be automatically completed by coordinating the reversal of the power head; when adjacent drill pipes are disassembled, the synchronous rotation of the water braid shaft and the main shaft of the power head is achieved by switching the oil supply direction of the cylinder, ensuring that the threads between the drill pipes are quickly loosened. The process is completely controlled by hydraulic and mechanical linkage, without the need for manual intervention, which significantly improves the continuity of operations and the level of equipment intelligence.

[0037] 4. Cooling system integration and durability improvement

[0038] The hollow water hole of the water braid shaft runs through its axial direction, directly connecting the external cooling water source and the inner cavity of the drill pipe, so as to realize the continuous and stable delivery of coolant during drilling. Compared with the traditional split cooling system, this solution integrates the cooling channel into the water braid shaft to avoid the risk of wear and leakage caused by external pipelines; at the same time, the water braid body is designed with sliding cooperation between the sealing ring and the clutch cylinder, which effectively isolates the external mud and impurities from intrusion while ensuring the freedom of movement of the water braid shaft forward and backward, thereby extending the service life of key components. In addition, in the drilling state, the water braid shaft can be moved to the far right to disengage from the rotating contact, further reducing friction loss and reducing maintenance frequency.

[0039] 5. Enhanced compatibility and versatility

[0040] The device is modularly designed to be compatible with active drill pipes and self-detachable drill pipes of various specifications. The size of the polygonal shaft at the front end of the water braid shaft can be flexibly adjusted to meet the matching requirements of different drill pipe cavities; the fixed frame and end cover of the clutch assembly adopt standardized interfaces, which is convenient for rapid integration with the existing drilling rig power head. This design not only improves the compatibility of the device with conventional drilling rigs, but also provides a low-cost solution for the upgrading and transformation of drilling equipment, and has broad application prospects.

[0041] In summary, the present invention systematically solves the problems of structural redundancy, inefficient operation, insufficient connection strength and poor automation adaptability of traditional drill pipe devices through structural innovation and functional integration, providing reliable technical support for the efficient and intelligent development of drilling projects.

[0042] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0044] Figure 1 An axonometric diagram of an embodiment of the present scheme;

[0045] Figure 2 A cross-sectional view of an embodiment of the present invention;

[0046] Figure 3 This is the main view of the water braid;

[0047] Figure 4 This is a cross-sectional view of the water braid;

[0048] Figure 5 This is the axonometric view of the clutch cylinder;

[0049] Figure 6 It is a cross-sectional view of the clutch cylinder;

[0050] Figure 7 It is an axonometric view of the piston outer cylinder;

[0051] Figure 8 This is the axonometric drawing of the connection block;

[0052] Fig. 9 It is an axonometric view of the clutch assembly;

[0053] Fig.10 A cross-sectional view of the clutch assembly.

[0054] Figure numerals: 1 water braid, 11 water inlet sleeve, 12 fixing ring, 13 sealing strip, 14 flange, 15 bearing, 16 water braid body, 161 groove, 17 water braid shaft, 171 polygonal shaft, 172 water hole, 2 clutch cylinder, 21 connecting block, 22 piston outer cylinder, 23 combination ring, 24 piston inner cylinder, 3 end cover, 4 connecting rod, 5 clutch assembly, 51 load block, 511 polygonal shaft, 52 slider, 53 fixing frame, 54 bearing, 55 clutch block, 532 polygonal inner hole, 533 meshing teeth. DETAILED DESCRIPTION

[0055] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0056] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0057] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0058] See also Figures 1 to 10 The specific implementation of the self-detachable drill pipe water braid device of the present invention is as follows:

[0059] The device structure is implemented as follows Figure 1 As shown, the device is mainly composed of a water braid 1, a clutch cylinder 2, an end cover 3, a connecting rod 4 and a clutch assembly 5. The water braid 1 includes a water inlet sleeve 11, a fixing ring 12, a sealing strip 13, a flange 14, a bearing 15, a water braid body 16 and a water braid shaft 17. The water braid body 16 is slidably connected with the piston inner cavity of the clutch cylinder 2 through a sealing ring, and a groove 161 is provided inside the water braid shaft 17 for installing the sealing ring. The water braid shaft 17 is a hollow shaft body, and a polygonal shaft 171 is provided at the front end for meshing with the inner hole of the rear end of the drill pipe. The middle section cooperates with the clutch block 55 of the clutch assembly 5 through a polygonal shaft section, and the rear end is fixed in the water braid body 16 through the flange 14 and the bearing 15. The water hole 172 runs through its axial direction to realize the delivery of coolant.

[0060] The clutch oil cylinder 2 is composed of an inner oil cylinder and an outer oil cylinder. The inner oil cylinder is integrated with the water braid housing, and drives the water braid shaft 17 to move forward and backward through the piston inner cylinder 24; the outer oil cylinder includes a piston outer cylinder 22, a piston inner cylinder 24 and a connecting block 21, and the two are sealed and matched through a combination ring 23 to form an independent piston chamber. The outer oil cylinder is connected to the load block 51 of the clutch assembly 5 through a connecting rod 4, and the axial displacement of the load block 51 is driven by hydraulic control.

[0061] The clutch assembly 5 comprises a load block 51, a slider 52, a fixing frame 53, a bearing 54 and a clutch block 55. The load block 51 is provided with meshing teeth and a polygonal shaft 511 meshing with the clutch block 55. The clutch block 55 is provided with a polygonal inner hole 532 meshing with the middle section of the water braid shaft 17, and the end portion cooperates with the load block 51 through the meshing teeth 533. The fixing frame 53 is connected to the end cover 3 through a connecting rod to ensure that the clutch assembly 5 is stationary in the circumferential direction.

[0062] Operational process implementation

[0063] Drill rod self-disassembly

[0064] Turn off the cooling water supply to water braid 1;

[0065] Supply oil to the right chamber of the inner cylinder of the clutch cylinder 2 to push the water braid shaft 17 into the inner chamber of the drill pipe, so that the polygonal shaft 171 is meshed with the rear end of the drill pipe;

[0066] Supply oil to the right chamber of the outer cylinder of the clutch cylinder 2 to drive the load block 51 to slide, so that the clutch block 55 engages with the end cover 3 and locks the circumferential movement of the water braid shaft 17;

[0067] Start the power head main shaft to reverse and drive the drill rod to separate from the active drill rod.

[0068] Adjacent drill pipe removal

[0069] Turn off the cooling water of water braid 1;

[0070] The right chamber of the clutch cylinder 2 supplies oil to allow the water braid shaft 17 to be inserted into the inner chamber of the adjacent drill pipe;

[0071] The left chamber of the outer oil cylinder supplies oil, driving the load block 51 to slide, causing the clutch block 55 to mesh with the main shaft of the power head, and the water braid shaft 17 to rotate synchronously with the main shaft;

[0072] Start the spindle to reverse and release the adjacent drill rod from the drill rod fixed by the clamp.

[0073] Drill pipe connection

[0074] The thread at the front end of the active drill pipe is automatically screwed into the drill pipe to be connected to complete the connection.

[0075] Drilling status control

[0076] Keep the load block 51 of the clutch assembly 5 out of engagement, and move the water braid shaft 17 to the rightmost end to avoid contact with rotating parts and reduce wear.

[0077] Key components work together

[0078] Water braid shaft 17: transmits torque through polygonal shaft 171 and delivers coolant through water hole 172 to achieve functional integration;

[0079] Clutch cylinder 2: The inner and outer cylinders are independently controlled to accurately adjust the displacement of the water braid shaft 17 and the meshing state of the clutch assembly 5;

[0080] Clutch assembly 5: The meshing teeth 533 of the load block 51 and the clutch block 55 are designed to ensure stable power transmission under high torque conditions.

[0081] Implementation Effect

[0082] Through the above-mentioned structural design and operation process, this device realizes the automatic and rapid disassembly and connection of the drill rod, simplifies the complex clamping mechanism in the traditional drilling rig, significantly improves the operating efficiency and equipment reliability, and is suitable for high-load drilling scenarios.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A self-disassembling drill pipe water braid device, characterized in that: include: A water braid (1), a clutch oil cylinder (2), an end cover (3), a connecting rod (4) and a clutch assembly (5); The water braid (1) comprises a water inlet sleeve (11), a fixing ring (12), a water braid body (16) and a water braid shaft (17); The water inlet sleeve (11) is arranged at the end of the water braid (1) and is fixed to the water braid body (16) via a fixing ring (12); The water braid body (16) is slidably connected to the piston inner cavity of the clutch oil cylinder (2); The water braid shaft (17) is a hollow structure, the front end of which cooperates with the drill rod, the middle part of which meshes with the clutch block (55) of the clutch assembly (5), and the rear end of which is fixed in the water braid body (16); The clutch cylinder (2) comprises an inner cylinder and an outer cylinder, the inner cylinder is connected to the water braid housing, and the outer cylinder is connected to the load block (51) of the clutch assembly (5) via a connecting rod (4); The clutch assembly (5) comprises a load block (51), a slider (52), a fixing frame (53), a bearing (54) and a clutch block (55); the clutch block (55) is connected to the end cover (3) via the fixing frame (53); the interior of the clutch block (55) is meshed with the middle section of the water braid shaft (17); the load block (51) cooperates with the meshing teeth (533) of the clutch block (55) via the slider (52) to achieve circumferential fixation and axial sliding; The clutch oil cylinder (2) controls the meshing state of the clutch block (55) and the power head main shaft or the end cover (3) by driving the load block (51) to move, so as to switch the rotation or stillness of the water braid shaft (17).

2. The self-detachable drill pipe water braid device according to claim 1, characterized in that: The water braid body (16) is slidably connected to the piston inner cavity of the clutch oil cylinder (2) via a sealing ring.

3. The self-detachable drill pipe water braid device according to claim 1, characterized in that: The front end of the water braid shaft (17) is provided with a polygonal shaft (171) which matches with the polygonal inner hole at the rear end of the drill rod.

4. The self-detachable drill pipe water braid device according to claim 1, characterized in that: A polygonal shaft section is provided in the middle of the water braid shaft (17) and is engaged with a clutch block (55) of the clutch assembly (5).

5. The self-detachable drill pipe water braid device according to claim 1, characterized in that: The rear end of the water braid shaft (17) is fixed in the water braid body (16) via a flange (14) and a bearing (15).

6. The self-detachable drill pipe water braid device according to claim 1, characterized in that: The clutch block (55) is provided with a polygonal inner hole (532) therein for engaging with the middle section of the water braid shaft (17).

7. The self-detachable drill pipe water braid device according to claim 1, characterized in that: The water hole (172) of the water braid shaft (17) runs through the axial direction thereof and is used for conveying cooling liquid to the inner cavity of the drill rod.

8. The self-detachable drill pipe water braid device according to claim 1, characterized in that: The outer cylinder of the clutch cylinder (2) comprises an outer piston cylinder (22) and an inner piston cylinder (24), which are tightly matched to form a sealed cavity and are connected to the connecting rod (4) via a connecting block (21) to drive the axial movement of the load block (51).

9. A method for self-disassembly of a drill pipe based on the device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Drill pipe self-disassembly steps: a. Turn off the cooling water supply of the water braid (1); b. supplying oil to the right inner chamber of the clutch cylinder (2) to drive the water braid shaft (17) into the inner chamber of the drill pipe and engage with the polygonal inner hole at the rear end of the drill pipe; c. supplying oil to the right chamber of the outer cylinder of the clutch cylinder (2) to drive the load block (51) to slide, so that the clutch block (55) engages with the end cover (3) to lock the circumferential movement of the water braid shaft (17); d. Start the power head main shaft to reverse and drive the drill rod to separate from the active drill rod; Adjacent drill pipe disassembly steps: a. Turn off the cooling water supply of the water braid (1); b. supplying oil to the right inner chamber of the clutch cylinder (2) to drive the water braid shaft (17) into the adjacent drill pipe cavity; c. Supply oil to the left chamber of the outer cylinder of the clutch cylinder (2), drive the load block (51) to slide, so that the clutch block (55) engages with the main shaft of the power head, and the water braid shaft (17) rotates synchronously with the main shaft; d. Start the power head main shaft to reverse and drive the adjacent drill rods to disengage; Drill pipe connection steps: The automatic connection of the drill pipe is completed through the thread at the front end of the active drill pipe; Drilling status control steps: Keep the load block (51) of the clutch assembly (5) out of engagement and move the water braid shaft (17) to the rightmost end to reduce rotational wear.

10. The method according to claim 9, characterized in that: In the "drill rod self-disassembly step" and the "adjacent drill rod disassembly step", the engagement between the water braid shaft (17) and the drill rod realizes circumferential torque transmission and axial sliding through the polygonal shaft (171).

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