Flat-bottom directional drill bit for extraction hole

Abstract

The utility model relates to the technical field of metal drill bits, and discloses a flat-bottomed directional drill bit for extraction holes, which comprises a flat-bottomed drill bit part, the middle of the end face of the flat-bottomed drill bit part is integrally connected with a drill bit connecting handle rod part, and the side surface of the flat-bottomed drill bit part is provided with an arc groove and a V-shaped groove. The arc-shaped grooves and the V-shaped grooves are crossed and distributed in a surrounding mode at equal intervals. By arranging the convex ball tooth cutter part and the directional convex tooth cutter part, the convex ball tooth cutter part located in the center is located at the position, closer to the axis, of the cutter, the stress range of the cutter is smaller in the rotating process, and the directional convex tooth cutter part is designed to be located at the position, close to the outer edge, of the end face of the bottoming drill head, so that in the long-term directional operation process of the bottoming drill head, the directional convex tooth cutter part is more stable. The combination of the directional resistance-reducing cutter support block and the directional tunneling cutter head can better bear abrasion and improve the support force, so that the effect of strengthening directional operation bearing is achieved, and the targets of reducing loss and improving the stability of propulsion operation are achieved.

Description

A flat-bottomed directional drill bit for extraction holes Technical Field

[0001] This utility model relates to the field of metal drill bit technology, and in particular to a flat-bottomed directional drill bit for extraction holes. Background Technology

[0002] A gas extraction drill bit is a tool used for drilling operations, particularly in the field of coal mine gas extraction. The main functions of a gas extraction drill bit include not only drilling operations—that is, drilling deep holes in environments such as coal mines to penetrate coal seams or rock strata—but also gas extraction: after drilling is completed, the gas from the coal seam and goaf is extracted to the surface through a pipeline system connected to the drill bit for utilization or safe disposal, preventing gas accumulation and potential safety accidents.

[0003] The structure of a pumping drill bit typically consists of two parts: the drill bit body and the drill rod. The front end of the drill bit body is equipped with cutting blocks, blades, etc., and flat-bottomed drill bits are also a commonly used type of pumping drill bit. Currently, the blade designs of the commonly used flat-bottomed directional drill bits for pumping are basically simple raised spheres or raised flat-mouth structures. In long-term directional drilling operations, a single blade structure is subjected to directional forces for a long time, which not only leads to rapid wear but also makes the operation unstable and lacks directional reinforcement design. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a flat-bottomed directional drill bit for extraction holes, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A flat-bottomed directional drill bit for extraction holes includes a flat-bottomed drill head. A drill bit connecting shank is integrally connected to the middle of the end face of the flat-bottomed drill head. An arc-shaped groove and a V-shaped groove are formed on the side surface of the flat-bottomed drill head. The arc-shaped groove and the V-shaped groove are intersecting and equidistantly distributed around the end face of the flat-bottomed drill head away from the drill bit connecting shank. A directional tooth cutting edge and a convex ball cutting edge are formed on the end face of the flat-bottomed drill head. The directional tooth cutting edge and the convex ball cutting edge are equidistantly distributed around the end face of the flat-bottomed drill head.

[0007] Preferably, the flat-bottomed drill bit includes a drill bit body, a cutting tooth carrier plate, and a base plate. The directional convex cutting tooth and the convex ball cutting tooth are both disposed on the surface of the cutting tooth carrier plate. The drill bit connecting shank is connected to the base plate. The cutting tooth carrier plate and the base plate are respectively distributed on both ends of the drill bit body.

[0008] Preferably, there are two of each of the arc-shaped grooves and V-shaped grooves, and the flat-bottomed drill head has an overall disc-shaped structure.

[0009] Preferably, the directional tooth cutting section includes a directional tunneling cutter head and a directional drag-reducing cutter support block, and the end faces of the directional tunneling cutter head and the directional drag-reducing cutter support block are integrally connected.

[0010] Preferably, the convex ball cutting tool includes a convex ball tool base and a convex ball tool head, the convex ball tool head being integrally connected to the end of the convex ball tool base, the convex ball tool head having a hemispherical structure, and the convex ball tool base having a frustum-shaped structure.

[0011] Preferably, the convex ball cutting edge is distributed around the center of the cutting edge carrier surface, and the directional convex cutting edge is distributed around the edge of the cutting edge carrier surface, with the directional convex cutting edge positioned between the arc groove and the V-shaped groove opening.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This flat-bottomed directional drill bit for extraction holes features a convex ball cutter head and a directional convex cutter head structure. The convex ball cutter head, located at the center, is positioned closer to the axis of the cutter, resulting in a smaller force range during rotation. The directional convex cutter head structure is designed near the outer edge of the flat-bottomed drill head end face. This allows the combination of the directional drag-reducing cutter support block and the directional tunneling cutter head to better withstand wear and increase support force during long-term directional operations. This enhances the load-bearing capacity of directional operations and achieves the goals of reducing wear and improving the stability of the propulsion operation. Attached Figure Description

[0014] Figure 1 is a three-dimensional view of the structure of this utility model;

[0015] Figure 2 is another perspective view of the structure of this utility model;

[0016] Figure 3 is a perspective view of the convex ball tooth cutting part of this utility model;

[0017] Figure 4 is a perspective view of the directional tooth cutting tool of this utility model.

[0018] In the diagram: 1. Flat-bottomed drill head; 2. Drill bit connecting shank; 3. Arc groove; 4. V-shaped groove; 5. Convex ball cutting tool; 6. Directional convex cutting tool.

[0019] 101. Drill bit disc body; 102. Cutter tooth carrier disc; 103. Base disc; 501. Convex ball cutter seat; 502. Convex ball cutter head; 601. Directional tunneling cutter head; 602. Directional drag-reducing cutter support block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Referring to Figures 1-4, a flat-bottomed directional drill bit for extraction holes includes a flat-bottomed drill head 1. A drill bit connecting shank 2 is integrally connected to the middle of the end face of the flat-bottomed drill head 1. An arc groove 3 and a V-shaped groove 4 are formed on the side surface of the flat-bottomed drill head 1. The arc groove 3 and the V-shaped groove 4 are intersected and equidistantly distributed around the end face of the flat-bottomed drill head 1 away from the drill bit connecting shank 2. A directional toothed cutter 6 and a convex ball toothed cutter 5 are formed on the end face of the flat-bottomed drill head 1. The directional toothed cutter 6 and the convex ball toothed cutter 5 are equidistantly distributed around the end face of the flat-bottomed drill head 1.

[0022] In this utility model, the flat-bottomed drill head 1 includes a drill head body 101, a cutting tooth carrier 102, and a base plate 103. The directional convex cutting tooth part 6 and the convex ball cutting tooth part 5 are both disposed on the surface of the cutting tooth carrier 102. The drill bit connecting shank part 2 is connected to the base plate 103. The cutting tooth carrier 102 and the base plate 103 are respectively distributed on the two end faces of the drill head body 101.

[0023] More specifically, by setting the cutting tooth carrier 102, and according to the description in Figures 1 and 2, the chamfer design of its edge can advance more smoothly, which is beneficial to drilling operations.

[0024] In this utility model, there are two circular arc grooves 3 and two V-shaped grooves 4, and the flat bottom drill head 1 has an overall disc-shaped structure.

[0025] More specifically, by setting two of each of the arc-shaped groove 3 and the V-shaped groove 4, propulsion can be improved and resistance reduced.

[0026] In this utility model, the directional tooth cutter part 6 includes a directional tunneling cutter head 601 and a directional drag-reducing cutter support block 602, and the end faces of the directional tunneling cutter head 601 and the directional drag-reducing cutter support block 602 are integrally connected.

[0027] More specifically, by setting the end faces of the directional tunneling cutter head 601 and the directional drag-reducing cutter support block 602 to be integrally connected, the overall structural stability is ensured.

[0028] In this utility model, the convex ball cutting tool part 5 includes a convex ball cutting tool base 501 and a convex ball cutting tool ball head 502. The convex ball cutting tool ball head 502 is integrally connected to the end of the convex ball cutting tool base 501. The convex ball cutting tool ball head 502 has a hemispherical structure, and the convex ball cutting tool base 501 has a frustum-shaped structure.

[0029] More specifically, by setting the convex ball tool holder 501 to a frustum-shaped structure, it provides better support for the ball head 502 of the convex ball tool and has better resistance to deformation.

[0030] In this utility model, the convex ball tooth cutter 5 is distributed around the center of the tooth carrier plate 102, and the directional convex tooth cutter 6 is distributed around the edge of the tooth carrier plate 102. The directional convex tooth cutter 6 is located between the arc groove 3 and the V-shaped groove 4.

[0031] More specifically, by positioning the directional toothed cutter 6 between the arc groove 3 and the V-shaped groove 4, the gap between the arc groove 3 and the V-shaped groove 4 can be better utilized to pass through the drilled slag.

[0032] Working principle: During operation, the cutter carrier plate 102 of the flat-bottom drill head 1 partially contacts the borehole surface, while the convex ball cutter part 5 and the directional convex cutter part 6 combine to form the cutting edge structure of the tool. The convex ball cutter part 5 is located at the center of the cutter carrier plate 102, which is closer to the axis. During its rotation, it experiences a smaller force range and is less prone to deformation. The directional convex cutter part structure 6 is designed near the outer edge of the end face of the flat-bottom drill head, so that during long-term directional operation, the combination of the directional drag-reducing tool support block and the directional tunneling tool head provides reinforced support and reduces wear.

[0033] By designing a convex ball cutter head and a directional convex cutter head structure, the centrally located convex ball cutter head is positioned closer to the axis of the cutter, resulting in a smaller force range during rotation. Meanwhile, the directional cutter head structure is designed near the outer edge of the flat-bottomed drill head end face. This allows the combination of the directional drag-reducing cutter support block and the directional tunneling cutter head to better withstand wear and increase support force during long-term directional operations. This achieves the effect of strengthening the load-bearing capacity of directional operations, reducing wear, and improving the stability of propulsion operations.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A flat-bottomed directional drill bit for extraction holes, comprising a flat-bottomed drill head (1), characterized in that, The flat-bottomed drill head (1) has a drill bit connecting shank (2) integrally connected to the middle of its end face. The side surface of the flat-bottomed drill head (1) is provided with an arc groove (3) and a V-shaped groove (4). The arc groove (3) and the V-shaped groove (4) are intersecting and equidistantly distributed around the drill bit connecting shank (2). The end face of the flat-bottomed drill head (1) away from the drill bit connecting shank (2) is provided with a directional convex tooth cutter (6) and a convex ball tooth cutter (5). The directional convex tooth cutter (6) and the convex ball tooth cutter (5) are equidistantly distributed around the end face of the flat-bottomed drill head (1).

2. The flat-bottomed directional drill bit for extraction holes according to claim 1, characterized in that, The flat-bottomed drill head (1) includes a drill bit body (101), a cutting tooth carrier (102), and a base plate (103). The directional convex cutting tooth part (6) and the convex ball cutting tooth part (5) are both disposed on the surface of the cutting tooth carrier (102). The drill bit connecting shank part (2) is connected to the base plate (103). The cutting tooth carrier (102) and the base plate (103) are respectively distributed on the two end faces of the drill bit body (101).

3. A flat-bottomed directional drill bit for extraction holes according to claim 1, characterized in that, The number of the arc groove (3) and the V-shaped groove (4) are both two, and the flat bottom drill head (1) has an overall disc-shaped structure.

4. A flat-bottomed directional drill bit for extraction holes according to claim 1, characterized in that, The directional tooth cutting section (6) includes a directional tunneling cutter head (601) and a directional drag-reducing cutter support block (602), and the end faces of the directional tunneling cutter head (601) and the directional drag-reducing cutter support block (602) are integrally connected.

5. A flat-bottomed directional drill bit for extraction holes according to claim 1, characterized in that, The convex ball cutting tool part (5) includes a convex ball cutting tool base (501) and a convex ball cutting tool head (502). The convex ball cutting tool head (502) is integrally connected to the end of the convex ball cutting tool base (501). The convex ball cutting tool head (502) has a hemispherical structure, and the convex ball cutting tool base (501) has a frustum-shaped structure.

6. A flat-bottomed directional drill bit for extraction holes according to claim 2, characterized in that, The convex ball cutting edge (5) is distributed around the center of the cutting edge carrier plate (102), and the directional convex cutting edge (6) is distributed around the edge of the cutting edge carrier plate (102). The directional convex cutting edge (6) is located between the arc groove (3) and the V-shaped groove (4).

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