Drill pipe escape tool and tool assembly

Abstract

This utility model provides a milling tool for detaching drill rods to assist drilling rigs in more effectively detaching drill rods and improving overall construction efficiency. It includes a housing with a hollow cavity forming a hole for inserting the drill rod. One end of the hole has an open insertion port for inserting the drill rod, and a drilling tool is provided on the outer edge of the insertion port. The other end of the hole has a drilling rig connection portion configured similarly to the mating portion and allowing for a detachable threaded connection. This allows the drill shaft of the drilling rig to be threadedly connected to the drilling rig connection portion when the drill rod is inserted into the hole, driving the tool to rotate with the housing fitted onto the drill rod, thereby forming a drilling coverage area on the outer periphery of the drill rod.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, and more specifically to a tool for assisting drilling rigs in freeing drill rods from obstruction. Background Technology

[0002] In the field of tunnel construction, pre-reinforcement and geological exploration procedures such as advanced drilling and grouting are core technical means to ensure construction safety and project quality. By exploring the geological structure ahead of the tunnel face in advance and pre-reinforcing unfavorable strata, they provide key technical support for the safe and smooth excavation of the tunnel.

[0003] The aforementioned procedures must be carried out in complex and variable harsh geological environments (such as loose and fractured strata, high-pressure and water-rich strata), specifically requiring the drill pipe to be drilled tens to hundreds of meters into the target stratum. However, as the drilling depth increases, the strata are prone to instability phenomena such as necking and collapse due to drilling disturbances, causing the drill pipe and drill bit to be encased and stuck in the strata's rock and soil. This makes it difficult for the drill pipe to move axially as required, such as retracting and removing it. In this situation, simply driving the drill pipe to rotate continuously by the drilling rig is usually insufficient to overcome the static friction required to achieve the axial movement of the drill pipe, thus making it difficult to successfully free and remove it. This not only leads to the interruption of the construction process but may also cause secondary engineering risks such as landslides and water inrushes due to prolonged stagnation, significantly reducing construction efficiency. Utility Model Content

[0004] One of the purposes of this utility model is to address the shortcomings of the existing technology by providing a milling tool for untangling drill rods, which can assist drilling rigs in more effectively untangling drill rods and improve overall construction efficiency.

[0005] The second objective of this utility model is to provide a drill rod untangling milling tool assembly having the aforementioned drill rod untangling milling tool.

[0006] The overall technical solution of this utility model is as follows:

[0007] This utility model addresses the problem of poor untangling effect and low construction efficiency when using existing drilling rigs to free stuck drill rods. Specifically:

[0008] During tunnel construction, drill rods are often connected to the shaft of drilling rigs. These drill rods are driven into the ground or mountain strata to facilitate subsequent construction. However, during actual drilling operations, the drill rods can easily become stuck in the soil, making them impossible to remove. Simply rotating the drill rod by the rig is insufficient to free the rig, hindering construction and reducing efficiency. Therefore, auxiliary tools are needed to enhance the rig's ability to free itself from stuck positions.

[0009] Based on this, the present invention provides a milling tool for detaching drill rods to assist drilling rigs in more effectively detaching drill rods and thereby improving overall construction efficiency. The drill shaft of the drilling rig has a threaded connection at its end, and the tail end of the drill rod has a mating part that is detachably threaded to the threaded connection.

[0010] Specifically, the milling tool for untangling drill rods provided by this utility model includes a sleeve, the interior of which is hollow and has a sleeve hole for inserting the drill rod;

[0011] One end of the sleeve hole is formed with an open end for inserting a drill rod into the sleeve hole, and a drilling tool is provided on the outer edge of the insert.

[0012] The other end of the bushing is provided with a drill connection part, which is configured the same as the mating part and allows for a detachable threaded connection with the bolted part, so that:

[0013] When the drill rod is inserted into the sleeve hole, the drill shaft of the drill machine can be threaded to the drill machine connection part to drive the cutting tool to rotate with the sleeve mounted on the drill rod, so as to form a drilling coverage area on the outer periphery of the drill rod.

[0014] The above solution provides a drill rod freeing milling tool that can be detachably connected to the drill rig spindle and fitted onto the locked drill rod. When using this drill rod freeing milling tool, by fitting the sleeve onto the drill rod and connecting the drill rig connection part to the drill rig spindle, the rotation of the drill rig spindle and its advancement towards the drill rod will drive the sleeve to rotate, thereby driving the cutting tool to perform drilling feed and drill the soil or rock layer around the drill rod. This more effectively expands the space in which the drill rod can move, allowing the drill rod to be freed more quickly and improving the overall construction efficiency.

[0015] In some embodiments, there are multiple cutting tools arranged at intervals around the circumference of the bore. Configuring multiple cutting tools allows the drilling action to be performed uniformly along the entire circumference of the drill rod, ensuring a continuous and complete drilling coverage area. This more efficiently expands the working space around the drill rod, improving drilling efficiency and obstacle removal capabilities.

[0016] In some embodiments, the sleeve has a section of channel near the insertion port. In the direction from the drill connection to the insertion port, this section of channel has a gradually increasing diameter, so that the inner wall of the sleeve is formed with an inclined guide wall to guide the drill rod into the sleeve. By providing a channel section with a gradually increasing diameter to form an inclined guide wall, the drill rod can be smoothly guided into the sleeve. Even if the drill rod is slightly deviated, the guide wall can quickly complete the insertion, reducing operational difficulty and improving the convenience and efficiency of sleeve installation.

[0017] In some implementations, the casing includes:

[0018] The sleeve has insertion channels that are through-holes at both ends inside;

[0019] A drill bit sleeve that is detachably connected to one end of the sleeve body has an insertion channel with both ends being through-holes inside.

[0020] A drilling rig connecting sleeve is detachably connected to the other end of the sleeve body, and a drilling rig connecting part is provided on the side facing away from the sleeve body;

[0021] One end of the socket channel is open and connected to the port of the insertion channel, so that:

[0022] The insertion channel and the socket channel together form a sleeve hole, and the other end of the socket channel is open to form an insertion port;

[0023] The tool adapter insertion port is set on the drill bit sleeve.

[0024] The casing is divided into a casing body, a drill bit sleeve, and a drill rig connecting sleeve, and the three can be detachably connected: on the one hand, the cutting tool is set on the drill bit sleeve, and when the cutting tool wears out, only the drill bit sleeve needs to be replaced, without replacing the entire casing; moreover, the drill rig connecting sleeve can also be replaced separately when damaged, reducing maintenance costs; on the other hand, different cutting tool sleeves or connecting sleeves of different specifications can be flexibly replaced according to construction needs (such as drilling needs of different formations), improving the adaptability and economy of the tool.

[0025] Furthermore, in some embodiments, the drill bit sleeve is inserted into the sleeve body along the axial direction of the sleeve hole;

[0026] Furthermore, a threaded structure is formed between the insertion part of the drill bit sleeve and the sleeve body, allowing the drill bit sleeve to be detachably threadedly connected to the sleeve body. The connection is achieved through "axial insertion + threaded structure," which not only ensures the connection strength between the drill bit sleeve and the sleeve body, preventing loosening or falling off during drilling and ensuring drilling stability, but also allows for convenient and quick disassembly via the thread, facilitating the replacement of the drill bit sleeve and balancing stability and maintenance efficiency.

[0027] Furthermore, in some embodiments, the sleeve body is provided with a limiting part. This limiting part is located on the side of the drill bit sleeve facing the drilling rig connecting sleeve in the axial direction of the sleeve hole, and abuts against the drill bit sleeve connected to the sleeve body on this side. The limiting part on the sleeve body abuts against the drill bit sleeve in the axial direction, which can limit the displacement of the drill bit sleeve towards the drilling rig connecting sleeve, avoiding positional shift or loosening of the connection due to axial force, ensuring that the tool is always in a stable drilling position, and improving drilling accuracy and reliability.

[0028] Furthermore, in some embodiments, the drilling rig connecting sleeve is inserted into the sleeve body along the axial direction of the sleeve hole;

[0029] Furthermore, a threaded structure is formed between the insertion part of the drilling rig connecting sleeve and the sleeve body, allowing the drilling rig connecting sleeve to be detachably threadedly connected to the sleeve body. By connecting the drilling rig connecting sleeve and the sleeve body through "axial insertion + threaded structure", the connection strength is guaranteed, ensuring that the rotational power of the drilling rig is stably transmitted to the sleeve and preventing loosening; at the same time, the threaded connection allows for easy disassembly and replacement of damaged drilling rig connecting sleeves, improving power transmission efficiency and maintenance convenience.

[0030] Furthermore, in some embodiments, the drilling rig connecting sleeve has a guide channel, one end of which communicates with the insertion channel, and the other end extends to the surface of the drilling rig connecting sleeve and is open. The guide channel of the drilling rig connecting sleeve can discharge drilling debris from the sleeve hole through the open opening, reducing debris accumulation, preventing it from hindering the advance of the sleeve, ensuring smooth drilling process, and improving drilling efficiency and the stability of the sleeve operation.

[0031] For drill rods with internal grouting channels, drilling debris can easily enter these channels during drilling, affecting their subsequent reuse. Therefore, this invention further provides a milling tool assembly for untangling drill rods. Specifically:

[0032] The present invention relates to a milling tool assembly for detaching drill rods, which is used to assist a drilling machine in detaching drill rods. The end of the drill shaft of the drilling machine has a threaded part, and the tail end of the drill rod also has a mating part that is detachably threaded to the threaded part. The drill rod also has a grouting channel with both ends being through, and one end of the grouting channel extends to the outer surface of the mating part.

[0033] The drill pipe untangling milling tool assembly includes: the drill pipe untangling milling tool as described in any of the above embodiments, and a plug connecting sleeve for connecting to the tail end of the drill pipe;

[0034] The plug connector sleeve has a drill pipe mating part, which is adapted to allow for a detachable threaded connection.

[0035] The plug connector sleeve is also configured as follows:

[0036] When connecting the drill pipe joints, the ports of the grouting channels in the drill pipe are sealed.

[0037] Furthermore, the outer diameter of the plug connecting sleeve is no larger than the outer diameter of the drill rod, so that when the drill rod is connected to the drill rod, the plug connecting sleeve can be inserted into the sleeve hole along with the drill rod. By setting the plug connecting sleeve, the grouting channel port of the drill rod can be sealed, preventing drill debris from entering the channel, avoiding blockage, and reducing subsequent cleaning procedures.

[0038] In some embodiments, the plug connector sleeve has a side facing away from the drill pipe mating portion, and this side is provided with a pull-out portion configured identically to the mating portion. By making the pull-out portion of the plug connector sleeve structurally identical to the drill pipe mating portion, it can be directly connected to the threaded connection of the drilling rig. The pulling force of the drilling rig drives the plug connector sleeve, thereby pulling the drill pipe out without the need for additional tools, simplifying the drill pipe extraction operation and improving construction efficiency.

[0039] The main beneficial effects of the above technical solution are as follows:

[0040] By setting a sleeve with a bushing, a drill rod is inserted through an insertion port at one end of the bushing, and a drilling tool is provided on the outer edge of the insertion port. The other end of the bushing has a drilling machine connection part that is the same as the drill rod docking part, so as to be detachably threaded to the drill shaft of the drilling machine. In this way, when the drill rod is inserted into the bushing and the drill shaft of the drilling machine is connected to the drilling machine connection part, the tool can be driven to rotate with the bushing, forming a drilling coverage area on the outer periphery of the drill rod, so as to drill the soil or rock layer on the outer periphery of the drill rod, effectively expanding the drill rod's movement space, assisting the drilling machine to more efficiently get the drill rod out of trouble, and thus improving the overall construction efficiency. Attached Figure Description

[0041] The present invention will be further described below with reference to the accompanying drawings:

[0042] Figure 1 A cross-sectional view of a milling tool used to free a drill pipe from a tangled hole.

[0043] Figure 2 A schematic diagram of a split-type milling tool for untangling drill rods.

[0044] Figure 3 A cross-sectional schematic diagram of a split-type milling tool for untangling drill pipes.

[0045] Figure 4 A cross-sectional schematic diagram of a milling tool assembly for untangling drill pipes.

[0046] Figure 5 Diagram of drill pipe freeing action Figure 1 .

[0047] Figure 6 Diagram of drill pipe freeing action Figure 2 .

[0048] Figure 7 Diagram of drill pipe freeing action Figure 3 .

[0049] Figure 8 Diagram of drill pipe freeing action Figure 4 . Detailed Implementation

[0050] The present invention will be illustrated with specific examples below: Example 1:

[0051] Milling tool 1 for freeing drill pipe from tangles, as attached Figure 1 To be continued Figure 3 This is used to assist the drilling rig in freeing the drill rod 2 from its entrapment. The drilling rig has a drill shaft for outputting rotational power, and the end of the drill shaft has a threaded connection. In this embodiment, the threaded connection is a threaded hole with the opening facing outward.

[0052] The tail end of the drill rod 2 is provided with a mating part 2.1. In this embodiment, the mating part 2.1 is a column adapted to be inserted into the threaded hole. The surface of the column has an external thread that is screwed into the internal thread in the threaded hole to form a stud structure. By turning the drill rod 2, the mating part 2.1 on the drill rod 2 can be driven into the threaded hole to achieve a threaded connection, or the mating part 2.1 can be unscrewed from the threaded hole to achieve the disassembly between the drill rod 2 and the drill shaft.

[0053] Matching the above structure, as shown in the appendix. Figure 1 As shown, the milling tool 1 for untangling the drill rod in this embodiment includes a housing 1.1, the interior of which is hollow and has a sleeve hole 1.2 for inserting the drill rod 2.

[0054] The sleeve hole 1.2 is formed with an open end, providing an insertion port 1.21 for inserting the drill rod 2 into the sleeve hole 1.2; a drilling tool 1.3 is provided on the outer edge of the insertion port 1.21. The tool 1.3 is a protruding cutting head structure provided on the outer surface of the sleeve 1.1. In this embodiment, there may be several tools 1.3 (meaning two or more), and the tools 1.3 are arranged at intervals in the circumferential direction of the sleeve hole 1.2.

[0055] The other end of the bushing 1.2 is provided with a drill connection part 1.4, which is configured to be the same as the mating part 2.1 and allows for a detachable threaded connection with the threaded part. For example, the mating part 2.1 matches the stud structure, and the drill connection part 1.4 is a stud structure of the same size that can be threaded to the threaded hole of the drill shaft.

[0056] At this time, when the drill rod 2 is inserted into the sleeve hole 1.2, the drill spindle of the drilling rig can drive the sleeve 1.1 mounted on the drill rod 2 to rotate, thereby driving the cutting tool 1.3 on the sleeve 1.1 to rotate synchronously, so as to form a drilling coverage area on the outer periphery of the drill rod 2, that is, the area that the cutting tool 1.3 can cover for drilling when it rotates. When the drilling coverage area comes into contact with the rock or soil layer surrounding the drill rod 2, drill cuttings can be removed from the rock or soil layer surrounding the drill rod 2, thereby expanding the space on the outer periphery of the drill rod that allows the drill rod to move.

[0057] As attached Figure 1As shown, in this embodiment, the sleeve hole 1.2 has a section of channel near the insertion port 1.21. In the direction from the drill connection part 1.4 to the insertion port 1.21, this section of channel has a gradually increasing diameter, so that the inner wall of the sleeve hole 1.2 is formed with a guide wall 1.22 that is inclined to guide the drill rod 2 to be inserted into the sleeve hole 1.2.

[0058] In the above scheme, the casing 1.1 can be an integral structure or a modular assembly structure.

[0059] As attached Figure 2 To be continued Figure 3 In this embodiment, the casing 1.1 includes: a casing body 1.1a, a drill bit sleeve 1.1b, and a drill connecting sleeve 1.1c.

[0060] The sleeve 1.1a has an insertion channel 1.1a1 with both ends connected.

[0061] The drill bit sleeve 1.1b is detachably connected to the right end of the sleeve body 1.1a. The drill bit sleeve 1.1b has an internal insertion channel 1.1b1 with both ends being through-holes. (See attached...) Figure 3 As shown, the left end opening of the insertion channel 1.1b1 is connected to the right end of the insertion channel 1.1a1, so that the insertion channel 1.1a1 and the insertion channel 1.1b1 together form a sleeve hole 1.2, and the right end opening of the insertion channel 1.1b1 forms an insertion port 1.21. At this time, the cutting tool 1.3 is adapted to the insertion port 1.21 and is mounted on the drilling tool sleeve 1.1b.

[0062] The drilling rig connecting sleeve 1.1c is detachably connected to the left end of the sleeve body 1.1a. The drilling rig connecting sleeve 1.1c is provided with a drilling rig connecting part 1.4 on the side facing away from the sleeve body 1.1a (i.e., the left end of the drilling rig connecting sleeve 1.1c).

[0063] In this embodiment, along the axial direction of the sleeve hole 1.2 (attached) Figure 3 (Extending in the direction shown by the central axis X), the drill connecting sleeve 1.1c has a portion that inserts into the sleeve body 1.1a; at this time, the outer periphery of the insertion portion of the drill connecting sleeve 1.1c has external threads, and the inner wall of the sleeve body 1.1a for the insertion portion of the drill connecting sleeve 1.1c is provided with internal threads that are threadedly connected to the external threads of the drill connecting sleeve 1.1c; so that the drill connecting sleeve 1.1c is detachably threadedly connected to the sleeve body 1.1a. The thread direction of the thread structure between the drill connecting sleeve 1.1c and the sleeve body 1.1a is preferably set according to the rotation direction of the drill shaft, so that when the drill shaft drives the drill connecting sleeve 1.1c to rotate, the sleeve body 1.1a and the drill connecting sleeve 1.1c are in a threaded tight state, thereby driving the sleeve body 1.1a to rotate synchronously.

[0064] In the axial direction of the sleeve 1.2 (attached) Figure 3 (Extending in the direction shown by the central axis X), the sleeve 1.1a has a portion that inserts into the drill bit sleeve 1.1b; at this time, the outer periphery of the insertion portion of the sleeve 1.1a has external threads, and the inner wall of the drill bit sleeve 1.1b for the insertion portion of the sleeve 1.1a is provided with internal threads that are threadedly connected to the external threads of the sleeve 1.1a; so that the drill bit sleeve 1.1b is detachably threadedly connected to the sleeve 1.1a. The thread direction of the thread structure between the sleeve 1.1a and the drill bit sleeve 1.1b is preferably set according to the rotation direction of the drill spindle, so that when the drill spindle drives the sleeve 1.1a to rotate, the sleeve 1.1a and the drill bit sleeve 1.1b are in a threaded tight state, thereby driving the drill bit sleeve 1.1b to rotate.

[0065] As attached Figure 3 As shown, a limiting part 1.1a2 may also be protruding on the sleeve 1.1a, along the axial direction of the sleeve hole 1.2 (see attached diagram). Figure 3 (Extending in the direction shown by the central axis X), the limiting part 1.1a2 is located on the side of the drill sleeve 1.1b facing the drill connecting sleeve 1.1c, and abuts against the drill sleeve 1.1b connected to the sleeve body 1.1a on this side.

[0066] As attached Figure 2 To be continued Figure 3 As shown, the drilling rig connecting sleeve 1.1c may also have a guide channel 1.1c1, one end of which is connected to the insertion channel 1.1a1, and the other end extends to the surface of the drilling rig connecting sleeve 1.1c and is open.

[0067] When using milling tool 1 to free drill rod 2 from entrapment on auxiliary drilling rig:

[0068] First, align the insertion port 1.21 with the tail end of the drill rod 2, and push the sleeve 1.1 forward to insert the drill rod 2 into the sleeve hole 1.2. Then, connect the drill rig connection part 1.4 to the drill rig shaft to complete the connection action.

[0069] Subsequently, the drilling rig is turned on to drive the drilling rig's shaft to rotate. This shaft drives the casing 1.1 to rotate, which in turn drives the cutting tool 1.3 to rotate around the drill rod 2 to form a drilling action. Simultaneously, the drilling rig is driven to advance towards the drill rod 2, which drives the cutting tool 1.3 to drill cuttings from the soil or rock layers around the drill rod 2, thereby expanding the drill rod's movement space and freeing the drill rod from obstruction.

[0070] The specific distance the drilling rig advances is set based on the locked position of drill rod 2; when drill rod 2 can move, the drilling rig can drive the casing 1.1 to retreat synchronously.

[0071] When the casing 1.1 is composed of the casing 1.1a, the drill bit sleeve 1.1b, and the drill connecting sleeve 1.1c, the rotating shaft first drives the drill connecting sleeve 1.1c to rotate around the rotating shaft X as the rotation center, then drives the casing 1.1a to rotate around the rotating shaft X as the rotation center, and finally drives the drill bit sleeve 1.1b with the cutting tool 1.3 to rotate around the rotating shaft X as the rotation center. Example 2:

[0072] A milling tool assembly for freeing drill rods is used to assist the drilling rig in freeing the drill rod 2. The drill shaft of the drilling rig has a threaded connection at its end, and the tail end of the drill rod 2 also has a mating part 2.1 that is detachably threaded to the threaded connection. The drill rod 2 has a grouting channel with both ends being through. One end of the grouting channel extends to the outer surface of the mating part 2.1, and the other end extends to the end of the drill rod 2 that is inserted into the soil or rock layer.

[0073] As attached Figure 4 As shown, the drill pipe untangling milling tool assembly in this embodiment includes: the drill pipe untangling milling tool 1 described in any of the schemes in Embodiment 1, and the plug connecting sleeve 3 for connecting to the tail end of the drill pipe 2.

[0074] As attached Figure 4 As shown, the plug connecting sleeve 3 has a drill rod mating part 3.1, which is adapted to allow a detachable threaded connection with the mating part 2.1. For example, the drill rod mating part 3.1 is a threaded hole that is identical to the threaded hole at the end of the drill shaft, and is adapted to allow a threaded connection with the stud-structured mating part 2.1.

[0075] When the drill rod docking part 3.1 is connected to the docking part 2.1, the port of the grouting channel in the drill rod 2 is blocked; and the outer diameter of the plug connecting sleeve 3 is not greater than the outer diameter of the drill rod 2, so that when the drill rod docking part 3.1 is connected to the docking part 2.1, the plug connecting sleeve 3 can be inserted into the sleeve hole 1.2 along with the drill rod 2.

[0076] As attached Figure 4 As shown, the plug connecting sleeve 3 also has a side facing away from the drill pipe mating portion 3.1, which is provided with a pull-in portion 3.2, configured to be identical to the mating portion 2.1. The mating portion 2.1 is matched with a stud structure, and the pull-in portion 3.2 is a stud structure of the same size that can be threadedly connected to the threaded hole of the drill shaft.

[0077] When using milling tool 1 to free drill rod 2 from entrapment on auxiliary drilling rig:

[0078] As attached Figure 5 As shown, first connect the drill rod mating part 3.1 of the plug connecting sleeve 3 with the mating part 2.1 at the tail end of the drill rod 2 by threading.

[0079] Then, the insertion port 1.21 is aligned with the tail end of the drill rod 2, and the sleeve 1.1 is pushed forward so that the plug connecting sleeve 3 and the drill rod 2 are both inserted into the sleeve hole 1.2. Subsequently, the drilling rig connection part 1.4 is connected to the drilling rig shaft to complete the connection action.

[0080] Subsequently, the drilling rig is started to drive the drilling rig's shaft to rotate. This shaft first drives the drilling rig connecting sleeve 1.1c to rotate around the shaft X, then drives the sleeve 1.1a to rotate around the shaft X, and finally drives the drill bit sleeve 1.1b with the cutting tool 1.3 to rotate around the shaft X. The cutting tool 1.3 rotates around the outer periphery of the drill rod 2 to form a drilling action. Simultaneously, the drilling rig is driven to advance towards the drill rod 2, which drives the cutting tool 1.3 to drill cuttings from the soil or rock layers around the drill rod 2, thereby expanding the drill rod's movement space and freeing the drill rod from obstruction.

[0081] The specific distance the drilling rig advances is set based on the locked position of drill rod 2. When drill rod 2 can move, the drilling rig connecting sleeve 1.1c can be directly disassembled, and the drilling rig's shaft can be inserted into sleeve 1.1a to connect with the drill rod docking part 3.1, thereby driving the drilling rig to rotate and move backward. The drill rod 2 can be rotated and pulled out without disassembling sleeve 1.1a. Alternatively, other shafts similar to the shaft can be used to insert into sleeve 1.1a and connect with drill rod docking part 3.1 to pull out drill rod 2.

[0082] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Furthermore, the terms "vertical," "horizontal," "front," and "rear," etc., mentioned in the embodiments of the present utility model, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. It should be further noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" in the description should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model according to the specific circumstances.

[0083] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A milling tool (1) for detaching drill rods, used to assist the drilling machine in detaching the drill rod (2). The end of the drill shaft of the drilling machine has a threaded connection, and the tail end of the drill rod (2) has a mating part (2.1) that is detachably threaded to the threaded connection. Its features are, The milling tool (1) for getting the drill rod out of trouble includes a sleeve (1.1), the inside of which is hollow and has a sleeve hole (1.2) for the drill rod (2) to be inserted. The sleeve hole (1.2) is formed with an open end, which is a fitting port (1.21) for inserting the drill rod (2) into the sleeve hole (1.2). A drilling tool (1.3) is provided on the outer edge of the fitting port (1.21). The other end of the bushing (1.2) is provided with a drill connection part (1.4), which is configured to be the same as the mating part (2.1) and provides a detachable threaded connection for the screw connection part, so that: When the drill rod (2) is inserted into the sleeve hole (1.2), the drill shaft of the drill can be threadedly connected to the drill connection part (1.4) to drive the cutting tool (1.3) to rotate with the sleeve (1.1) mounted on the drill rod (2) so as to form a drilling coverage area on the outer periphery of the drill rod (2).

2. The milling tool for freeing drill pipes according to claim 1, characterized in that: The cutting tool (1.3) is a plurality of such cutting tools (1.3) are arranged at intervals in the circumferential direction of the sleeve hole (1.2).

3. The milling tool for freeing drill pipes according to claim 1, characterized in that: The sleeve (1.2) has a section of channel near the insertion port (1.21). In the direction from the drill connection (1.4) to the insertion port (1.21), this section of channel has a gradually increasing diameter, so that the inner wall of the sleeve (1.2) is formed with an inclined guide wall (1.22) to guide the drill rod (2) to be inserted into the sleeve (1.2).

4. The milling tool for freeing drill pipes according to any one of claims 1 to 3, characterized in that: The casing (1.1) includes: The sleeve (1.1a) has an insertion channel (1.1a1) with both ends connected through it. A drill bit sleeve (1.1b) is detachably connected to one end of the sleeve (1.1a), and has an insertion channel (1.1b1) with both ends being through. A drilling rig connecting sleeve (1.1c) is detachably connected to the other end of the sleeve (1.1a), and the drilling rig connecting part (1.4) is provided on the side facing away from the sleeve (1.1a). One end of the insertion channel (1.1b1) is connected to the port of the insertion channel (1.1a1) so that: The insertion channel (1.1a1) and the socket channel (1.1b1) together form the sleeve hole (1.2), and the other end of the socket channel (1.1b1) opens to form the insertion port (1.21). The cutting tool (1.3) is adapted to the insertion port (1.21) and disposed on the drilling tool sleeve (1.1b).

5. The milling tool for freeing drill pipes according to claim 4, characterized in that: In the axial direction of the bushing (1.2), the drill bit bushing (1.1b) is inserted into the bushing body (1.1a); Furthermore, a threaded structure is formed between the insertion portion of the drill bit sleeve (1.1b) and the sleeve body (1.1a) so that the drill bit sleeve (1.1b) is detachably threadedly connected to the sleeve body (1.1a).

6. The milling tool for freeing drill pipes according to claim 5, characterized in that: The sleeve (1.1a) is provided with a limiting part (1.1a2). In the axial direction of the sleeve hole (1.2), the limiting part (1.1a2) is located on the side of the drill bit sleeve (1.1b) facing the drill connecting sleeve (1.1c), and abuts against the drill bit sleeve (1.1b) connected to the sleeve (1.1a) on this side.

7. The milling tool for freeing drill pipes according to claim 4, characterized in that: In the axial direction of the sleeve hole (1.2), the drilling rig connecting sleeve (1.1c) is inserted into the sleeve body (1.1a); Furthermore, a threaded structure is formed between the insertion portion of the drilling rig connecting sleeve (1.1c) and the sleeve body (1.1a), so that the drilling rig connecting sleeve (1.1c) is detachably threadedly connected to the sleeve body (1.1a).

8. The milling tool for freeing drill pipes according to claim 4, characterized in that: The drilling rig connecting sleeve (1.1c) has a flow guide channel (1.1c1), one end of which is connected to the insertion channel (1.1a1), and the other end extends to the surface of the drilling rig connecting sleeve (1.1c) and is open.

9. A milling tool assembly for detaching drill rods, used to assist a drilling machine in detaching a drill rod (2). The drill shaft of the drilling machine has a threaded connection at its end. The tail end of the drill rod (2) has a mating part (2.1) that is detachably threaded to the threaded connection. The drill rod (2) also has a grouting channel with both ends being through. One end of the grouting channel extends to the outer surface of the mating part (2.1). Its features are, The drill pipe untangling milling tool assembly includes: a drill pipe untangling milling tool (1) as described in any one of claims 1 to 8, and a plug connecting sleeve (3) for connecting to the tail end of the drill pipe (2); The plug connecting sleeve (3) has a drill rod mating part (3.1), which is adapted to allow the mating part (2.1) to be detachably threadedly connected; The plug connecting sleeve (3) is also configured as follows: When the drill rod connecting part (3.1) is connected to the connecting part (2.1), the port of the grouting channel in the drill rod (2) is blocked; Furthermore, the outer diameter of the plug connecting sleeve (3) is not greater than the outer diameter of the drill rod (2), so that when the drill rod mating part (3.1) is connected to the mating part (2.1), the plug connecting sleeve (3) can be inserted into the sleeve hole (1.2) along with the drill rod (2).

10. The milling tool assembly for freeing drill pipes according to claim 9, characterized in that: The plug connecting sleeve (3) has a side facing away from the drill pipe docking part (3.1), and a pull-up part (3.2) is provided on this side, which is configured to be the same as the docking part (2.1).

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