Long distance reaming device for horizontal directional drilling machine

Abstract

The utility model belongs to the horizontal directional drilling machine technical field, concretely relates to a long -distance reaming device for horizontal directional drilling machine, a long -distance reaming device for horizontal directional drilling machine, including the tubulature, the one end of tubulature is provided with the drill bit, the drill bit includes a plurality of drill blocks, is seted up with the recess between adjacent drill blocks, be provided with first nozzle in the recess, the drill bit still includes the annular groove of top end opening, be provided with second nozzle in the annular groove, the tubulature is close to the annular boss of drill bit a segment and is provided with, through the recess between drill blocks first nozzle setting, and the second nozzle is configured in the annular groove of drill bit top end, forms double -channel coolant injection system, wherein the second nozzle can accurate impact drill bit front end rock bed, and the first nozzle is responsible for the debris of flush drill block gap, significantly improves the chip removal efficiency when long -distance reaming, can avoid the problem of the blockage caused by the accumulation of debris, and effectively reduces the drill bit high temperature wear through the continuous coolant coverage.

Description

Technical Field

[0001] This utility model belongs to the field of horizontal directional drilling technology, specifically relating to a long-distance hole-reaming device for horizontal directional drilling. Background Technology

[0002] Horizontal directional drilling rigs are construction machines used to lay various underground utilities (such as pipelines and cables) without excavating the ground surface. They are widely used in the construction of pipelines for water supply, electricity, telecommunications, natural gas, coal gas, and oil. They are suitable for sandy soil, clay, gravel, and other soil conditions. They have the advantages of fast construction speed, high construction accuracy, and low cost. A horizontal directional drilling rig consists of a drilling system, a power system, a directional control system, a mud system, drilling tools, and auxiliary tools.

[0003] In the prior art, a utility model patent with publication number CN 205638227 U discloses a horizontal directional drilling rig reamer, which includes a body with a mounting hole in the middle and a frustum-shaped first outer surface at the front end, which is smaller at the front and larger at the rear. Multiple drill bits are uniformly welded onto the first outer surface, and the body is integrally cast. This utility model has an integrally formed body, and the mounting hole is located in the middle of the body, ensuring good coaxiality with the front drill bit, facilitating the laying of pipes, cables, and other equipment. However, this reamer has significant shortcomings in long-distance reaming operations. During long-distance operation, the drill bit's chip removal is poor, easily leading to blockage and reduced efficiency. Furthermore, it cannot effectively cope with the continuous high temperatures generated over long distances, resulting in rapid drill bit wear and a short lifespan. Utility Model Content

[0004] To address the aforementioned shortcomings in the existing technology, this utility model provides a long-distance borehole reaming device for horizontal directional drilling rigs, thereby solving the problems mentioned in the background technology.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a long-distance hole-reaming device for a horizontal directional drilling machine, comprising a pipe body, a drill bit provided at one end of the pipe body, the drill bit comprising a plurality of drill blocks, a groove being provided between adjacent drill blocks, and a first nozzle being provided in the groove; the drill bit further comprises an annular groove opened at the top end, and a second nozzle being provided in the annular groove; an annular boss is provided on a section of the pipe body near the drill bit.

[0006] Preferably, the outer surface of the annular boss is provided with raised texture, the raised texture is equidistant and spiral-shaped; the spiral raised texture rotates closely against the hole wall during operation, reducing the radial offset of the device, and can provide a more stable support structure, thereby improving the accuracy and stability of the hole enlargement process and ensuring the reliability of long-distance construction.

[0007] Preferably, the inner diameter of the second nozzle is smaller than that of the first nozzle, and the first and second nozzles are connected to the external coolant supply system through a channel inside the pipe body. The spray direction of the second nozzle is the same as the feed direction of the drill bit. The directional spray of the small inner diameter second nozzle enhances the impact force on the rock formation and optimizes the coolant distribution. At the same time, combined with the debris removal function of the large inner diameter first nozzle, it improves drilling efficiency and cooling coverage, and prevents drill bit damage caused by high temperature.

[0008] Preferably, the drill block is provided with threaded posts; the threaded posts strengthen the drill block, reduce operation interruptions, and extend the service life of the overall device.

[0009] Preferably, the drill bit and drill block are integrally formed and made of cemented carbide; the integral forming design combined with the cemented carbide material can improve the overall hardness and wear resistance of the drill bit, making it suitable for long-distance, high-intensity reaming operations, reducing wear and extending the life of the drill bit.

[0010] Preferably, the diameter of the annular boss is the same as the maximum outer diameter of the drill bit; this ensures that the annular boss provides uniform radial support, prevents the drill bit from deflecting or vibrating during hole enlargement, improves construction accuracy and hole wall quality, and avoids offset problems in long-distance operations.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] 1. By setting a first nozzle in the groove between the drill blocks and a second nozzle in the annular groove at the top of the drill bit, a dual-channel coolant injection system is formed. The second nozzle has a smaller inner diameter and sprays in the same direction as the feed direction, which can accurately impact the rock layer at the front end of the drill bit. The first nozzle is responsible for flushing the debris between the drill blocks. This design significantly improves the chip removal efficiency when reaming long distances, avoids the blockage problem caused by chip accumulation, and effectively reduces the high temperature wear of the drill bit through continuous coolant coverage.

[0013] 2. The annular boss located near the drill bit section of the pipe body has the same diameter as the maximum outer diameter of the drill bit, forming a stable radial support structure. The spiral textured surface of the boss allows it to rotate close to the hole wall, reducing radial offset during operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the drill bit structure of this utility model;

[0016] Figure 3 This is a front view of the present invention.

[0017] The reference numerals in the accompanying drawings include:

[0018] Pipe body (1), drill bit (2), drill block (21), threaded column (211), groove (22), first nozzle (221), annular groove (23), second nozzle (231), annular boss (3), raised pattern (31). Detailed Implementation

[0019] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1-3 As shown, a long-distance reaming device for a horizontal directional drilling rig includes a pipe body 1, a drill bit 2 at one end of the pipe body 1, the drill bit 2 includes a plurality of drill blocks 21, a groove 22 is formed between adjacent drill blocks 21, and a first nozzle 221 is provided in the groove 22; the drill bit 2 also includes an annular groove 23 formed at the top end, and a second nozzle 231 is provided in the annular groove 23; an annular boss 3 is provided on the section of the pipe body 1 near the drill bit 2.

[0024] In this embodiment, the outer surface of the annular boss 3 is provided with raised patterns 31, which are arranged at equal intervals and are spiral protrusions; wherein the annular boss 3 is located in the end region of the tube body 1 near the drill bit 2 and is adjacent to the drill bit 2.

[0025] In this embodiment, the inner diameter of the second nozzle 231 is smaller than that of the first nozzle 221, and the first nozzle 221 and the second nozzle 231 are connected to the external coolant supply system through the channel inside the pipe body 1. The spray direction of the second nozzle 231 is the same as the feed direction of the drill bit 2.

[0026] In this embodiment, a threaded post 211 is embedded on the drill block 21.

[0027] In this embodiment, the drill bit 2 and the drill block 21 are integrally formed and made of cemented carbide.

[0028] In this embodiment, the diameter of the annular boss 3 is the same as the maximum outer diameter of the drill bit 2; wherein the maximum outer diameter of the drill bit 2 refers to the diameter formed by the outer edge of the drill block 21, and the diameter of the annular boss 3 is the same.

[0029] The working principle of this utility model is as follows: When the horizontal directional drilling rig drives the pipe body 1 to rotate and advance, the drill block 21 of the drill bit 2 contacts the rock layer to cut. The pipe body 1 is connected and fixed to the external hollow drill rod. Coolant is delivered to the dual nozzles through the internal channel. Several second nozzles 231 in the annular groove 23 at the top of the drill bit 2 spray coolant in the direction of the drill bit 2's advance, impacting the rock layer in front to reduce drilling resistance. At the same time, it reduces the high temperature generated by friction at the front end of the drill block 21. Several first nozzles 221 in the groove 22 between adjacent drill blocks 21 spray coolant synchronously to flush away the rock cuttings accumulated between the drill blocks 21 and prevent blockage during long-distance hole enlargement. At the same time, the annular boss 3 of the pipe body 1 near the section of the drill bit 2 rotates close to the hole wall during operation. The spiral ridges 31 on its surface enhance the meshing with the hole wall, reduce the radial offset of the pipe body 1, and increase the feed accuracy of the drill bit 2.

[0030] The above are merely embodiments of this utility model. The circuits, electronic components, and modules involved are all prior art, fully achievable by those skilled in the art, and require no further explanation. The content protected by this application does not involve improvements to the software or methods. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field to which this utility model pertains prior to the application date or priority date, are able to access all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in conjunction with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A long-distance reaming device for a horizontal directional drilling rig, characterized in that: The tube (1) includes a pipe body (1), one end of which is provided with a drill bit (2). The drill bit (2) includes several drill blocks (21), and a groove (22) is provided between adjacent drill blocks (21). A first nozzle (221) is provided in the groove (22). The drill bit (2) also includes an annular groove (23) opened at the top end, and a second nozzle (231) is provided in the annular groove (23). An annular boss (3) is provided on a section of the pipe body (1) near the drill bit (2).

2. The long-distance reaming device for a horizontal directional drilling rig according to claim 1, characterized in that: The outer surface of the annular boss (3) is provided with raised patterns (31), which are equidistantly arranged and spirally raised.

3. The long-distance reaming device for a horizontal directional drilling rig according to claim 1, characterized in that: The inner diameter of the second nozzle (231) is smaller than that of the first nozzle (221), and the first nozzle (221) and the second nozzle (231) are connected to the external coolant supply system through the channel inside the pipe body (1). The spray direction of the second nozzle (231) is the same as the feed direction of the drill bit (2).

4. A long-distance reaming device for a horizontal directional drilling rig according to claim 1, characterized in that: The drill block (21) is fitted with a threaded post (211).

5. A long-distance reaming device for a horizontal directional drilling rig according to claim 1, characterized in that: The drill bit (2) and drill block (21) are integrally formed and made of cemented carbide.

6. A long-distance reaming device for a horizontal directional drilling rig according to claim 1, characterized in that: The diameter of the annular boss (3) is the same as the maximum outer diameter of the drill bit (2).

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