Reamer bit
By designing a retractable connecting block and jamming groove, the problem of inconvenient disassembly and assembly of the retractable drill bit is solved, the retractability accuracy and efficiency are improved, and the operation process is simplified.
Patent Information
- Application Number
- CN202510609501.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-07-29
AI Technical Summary
The disassembly and assembly of existing reaming drill bits affects the drilling and reaming efficiency, and conventional installation requires a large operating space and may lead to different centers of reaming.
A hole reaming drill bit is designed, adopting a detachable fixed connecting block structure, the connecting block abuts the drill rod, ensuring coaxial arrangement, and quickly disassemble and assemble through the clamping groove and limiting block, and is tied and fixed by wire.
It achieves high hole reaming accuracy and high disassembly and assembly efficiency, avoids drill rod retraction and large space operation, and ensures hole reaming quality.
Smart Images
Figure CN120384698A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of drilling equipment, and more particularly to a reaming bit. Background Art
[0002] Coal mine gas control drilling is a safety measure taken to eliminate gas accumulation or prevent gas explosion. By drilling holes in the coal seam, the gas in the coal seam can be extracted, thereby reducing the gas content in the coal seam and ensuring the safety of coal mine production.
[0003] For coal mine gas control drilling, drilling and reaming are required. The conventional method is to drill a certain distance (about 1 - 2 meters) at the opening of the hole, withdraw the original bit, replace it with a reaming bit, and then ream the base hole (about 0.7 meters), then withdraw the reaming bit, and then install a three-proof device to perform normal drilling. However, in the actual operation process, the disassembly and assembly of the drilling bit and the reaming bit are very inconvenient. The time required for single reaming is only about 3 minutes, but the time required for single disassembly and assembly of the reaming bit is at least 30 minutes. The long disassembly and assembly time of the reaming bit affects the drilling and reaming efficiency. In addition, when installing the conventional reaming bit, a large operating space is required, and the drill pipe needs to be retracted. After the reaming bit is installed, it is fed forward again. During this process, the reaming bit may be non-concentric with the previous base hole, thus affecting the reaming effect.
[0004] Therefore, how to provide a reaming bit that can overcome the above problems is an urgent problem to be solved by those skilled in the art. Summary of the Invention
[0005] In view of this, the present invention provides a reaming bit.
[0006] In order to achieve the above object, the present invention adopts the following technical scheme:
[0007] A reaming bit is connected to a drill pipe with a non-circular cross-sectional outer contour. An abutting surface is provided on the outer side wall of the drill pipe. The abutting surface is perpendicular to the center line of the drill pipe. The upper end of the drill pipe is connected to a drilling bit, and the lower end of the drill pipe is in transmission connection with the rotating output end of a drilling rig. It includes a bit body. The bit body includes drill teeth, drill wings, and a plurality of connecting blocks detachably fixed together. The drill teeth are fixed on the drill wings, the drill wings are fixed on the connecting blocks, and the plurality of connecting blocks jointly define an installation through hole. The shape of the installation through hole is the same as the cross-sectional outer contour of the drill pipe. The drill pipe is tightly inserted into the installation through hole. The connecting block can abut against the abutting surface. The maximum distance from the drill teeth to the center line of the drill pipe is greater than the drilling diameter of the drilling bit.
[0008] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a reaming bit. The drill bit body in the present invention includes a plurality of detachably fixed connection blocks. After the plurality of connection blocks are fixed together, they can be installed on the drill pipe. Therefore, when reaming, there is no need to disassemble the drilling bit on the drill pipe, and the drill pipe does not need to be completely withdrawn from the base hole. The drill pipe remains in the base hole. The above design ensures the reaming accuracy on the one hand, that is, the drill bit body can be coaxially arranged with the base hole drilled by the drilling bit, and on the other hand, the disassembly and assembly between the drill bit body and the drill pipe are very easy, and the disassembly efficiency of the drill bit body is high.
[0009] Preferably, an annular abutting surface is coaxially provided on the outer side wall of the drill pipe. The plurality of connection blocks are evenly arranged along the circumferential direction of the drill pipe. The lower side walls of the plurality of connection blocks can simultaneously abut against the abutting surface. A drill wing is fixed on each connection block, and a plurality of drill teeth are provided and are respectively fixed on the plurality of drill wings. This reaming bit can reliably perform reaming with high reaming quality. The plurality of connection blocks can be reliably fixed together and simultaneously abut against the abutting surface, thereby ensuring that the plurality of connection blocks will not move randomly along the length direction of the drill pipe, preventing dislocation or detachment.
[0010] Preferably, a clamping groove and a clamping block are respectively provided at both ends of the connection block. The clamping groove penetrates through the upper and lower side walls of the connection block. The groove length direction of the clamping groove can be the same as the length direction of the drill pipe. A clamping block can be tightly fitted into an adjacent clamping groove. Each adjacent two connection blocks are clamped by the clamping block and the clamping groove. Each adjacent two connection blocks can be reliably connected and can be disassembled and assembled smoothly.
[0011] Preferably, there are three connection blocks. The three connection blocks can be disassembled and assembled smoothly, and the three connection blocks can be reliably installed on the drill pipe, which is beneficial to the dynamic balance when the drill bit body rotates while ensuring the reaming effect.
[0012] Preferably, a limiting block is fixed on each connection block, and a connection through hole is provided on the limiting block. The head end of the iron wire passes through the plurality of connection through holes in sequence and is tied to its tail end. After the plurality of connection blocks are assembled, the plurality of limiting blocks can be penetrated and tied by the iron wire. The iron wire can limit the plurality of connection blocks, that is, prevent the plurality of connection blocks from moving randomly along the length direction of the drill pipe and prevent the plurality of connection blocks from being misaligned. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.
[0014] Figure 1 is an overall axonometric view of a core drill bit;
[0015] Figure 2 is an axonometric view of a core drill bit on a drill pipe Figure 1 ;
[0016] Figure 3 is an axonometric view of a core drill bit on a drill pipe Figure 2 ;
[0017] Figure 4 is an axonometric view of a drill pipe adapted to a core drill bit.
[0018] In the figure:
[0019] 1 is the drill pipe, 10 is the abutting surface, 2 is the drill tooth, 3 is the drill wing, 4 is the connecting block, 40 is the clamping groove, 41 is the clamping block, 5 is the limiting block, 50 is the connecting through hole, and 6 is the iron wire. Specific embodiments
[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.
[0021] The present invention discloses a core drill bit. The drill bit body in the present invention includes a plurality of detachably fixed connecting blocks 4. After the plurality of connecting blocks 4 are fixed together, they can be installed on the drill pipe 1. Therefore, when reaming, there is no need to disassemble the drilling bit on the drill pipe 1, and the drill pipe 1 does not need to be completely withdrawn from the base hole. The drill pipe 1 remains in the base hole. The above design ensures the reaming accuracy on the one hand, that is, the drill bit body can be coaxially arranged with the base hole drilled by the drill, and on the other hand, the disassembly and assembly between the drill bit body and the drill pipe 1 are very easy, and the disassembly efficiency of the drill bit body is high;
[0022] By designing the clamping groove 40 and the clamping block 41, every two adjacent connecting blocks 4 can be reliably connected and disassembled smoothly. The plurality of connecting blocks 4 can be reliably fixed together and simultaneously abut against the abutting surface 10, thereby ensuring that the plurality of connecting blocks 4 do not move randomly along the length direction of the drill pipe 1 and preventing dislocation or detachment;
[0023] By designing the limiting block 5 and the iron wire 6, the iron wire 6 can tie the plurality of connecting blocks 4 together, prevent the plurality of connecting blocks 4 from shifting too much along the length direction of the drill pipe 1, and avoid the separation of the plurality of already clamped connecting blocks 4.
[0024] Embodiment
[0025] See the appendix Figures 1-4 It is a schematic diagram of the overall and partial structures of an embodiment of the present invention. The present invention specifically discloses a hole-expanding drill bit, which is connected to a drill pipe 1 with a non-circular cross-sectional outer contour. In this application, the cross-sectional outer contour of the drill pipe 1 is an equilateral triangle with rounded corners at all three angles. There are multiple drill pipes 1, and the multiple drill pipes 1 are connected end to end in sequence. Specifically, a screw rod is coaxially provided at one end of the drill pipe 1, and a threaded hole is coaxially provided at the other end of the drill pipe 1. Every two adjacent drill pipes 1 are spirally connected through the screw rod and the threaded hole; an annular abutting surface 10 is coaxially provided on the outer side wall of the drill pipe 1. The abutting surface 10 is arranged close to the threaded hole, and the abutting surface 10 is perpendicular to the central axis of the drill pipe 1. The upper end of the drill pipe 1 is connected to the drilling bit, and the lower end of the drill pipe 1 is drivingly connected to the rotational output end of the drilling rig. The drilling rig drives the drilling bit through the drill pipe 1 to drill a basic hole in the rock mass, and the drilling bit feeds upward;
[0026] The hole-expanding drill bit includes a bit body;
[0027] The bit body includes drill teeth 2, drill wings 3, and multiple connecting blocks 4 that are detachably fixed together. The drill teeth 2 are fixed on the drill wings 3, the drill wings 3 are fixed on the connecting blocks 4, and the multiple connecting blocks 4 jointly define an installation through hole. The shape of the installation through hole is the same as the cross-sectional outer contour of the drill pipe 1. The drill pipe 1 is tightly inserted into the installation through hole. The connecting block 4 can abut against the abutting surface 10. The maximum distance from the drill teeth 2 to the central axis of the drill pipe 1 is greater than the drilling diameter of the drilling bit; when the drilling bit feeds and drills the basic hole, the drill pipe 1 also moves along with the drilling bit, thereby driving the rotating drill teeth 2 to move. The drill teeth 2 contact the rock mass where the basic hole is located and realize hole expansion.
[0028] The multiple connecting blocks 4 are evenly arranged along the circumferential direction of the drill pipe 1. The lower side walls of the multiple connecting blocks 4 can simultaneously abut against the abutting surface 10. One drill wing 3 is fixed on each connecting block 4. There are multiple drill teeth 2, and each is fixed on the multiple drill wings 3. In this embodiment, there are three connecting blocks 4, and the abutting surface 10 tightly abuts against the multiple connecting blocks 4 at the same time. When the drill teeth 2 rotate and feed along the axial direction of the drill pipe 1, the abutting surface 10 can prevent the multiple connecting blocks 4 from moving randomly along the axial direction of the drill pipe 1, and prevent the multiple connecting blocks 4 from being misaligned or disengaged.
[0029] A clamping groove 40 and a clamping block 41 are respectively provided at both ends of the connecting block 4. The clamping groove 40 penetrates the upper and lower side walls of the connecting block 4, and the groove length direction of the clamping groove 40 can be the same as the axial direction of the drill pipe 1. A clamping block 41 can be tightly fitted into an adjacent clamping groove 40. Every two adjacent connecting blocks 4 are clamped through the clamping block 41 and the clamping groove 40. Every two adjacent connecting blocks 4 can be reliably clamped and fixed. At the same time, the above design also facilitates the disassembly and assembly of the connecting block 4.
[0030] A limiting block 5 is fixed to the lower side wall of each connecting block 4. A connecting through hole 50 is provided on the limiting block 5. The head end of the iron wire 6 passes through a plurality of connecting through holes 50 in sequence and is tied to its tail end; the iron wire 6 can tie a plurality of connecting blocks 4 together, preventing the plurality of connecting blocks 4 from shifting too much along the length direction of the drill pipe 1 and avoiding the separation of the plurality of connecting blocks 4 that have been clamped together.
[0031] When installing this reaming bit:
[0032] First, keep the first connecting block 4 close to the outer side wall of the drill pipe 1 and immobile;
[0033] Then, keep the second connecting block 4 close to the outer side wall of the drill pipe 1, and then move the second connecting block 4 along the length direction of the drill pipe 1 so that the clamping block 41 on the second connecting block 4 is fitted into the clamping groove 40 on the first connecting block 4;
[0034] Then, keep the first connecting block 4 and the second connecting block 4 immobile, keep the third connecting block 4 close to the outer side wall of the drill pipe 1, and then move the third connecting block 4 along the length direction of the drill pipe 1 so that the clamping block 41 on the third connecting block 4 is fitted into the clamping groove 40 on the second connecting block 4, and at the same time, the clamping block 41 on the first connecting block 4 is fitted into the clamping groove 40 on the third connecting block 4. After completion of the installation, all three connecting blocks 4 are tightly pressed against the abutting surface 10 below them;
[0035] Finally, pass the head end of the iron wire 6 through a plurality of connecting through holes 50 in sequence and tie it to its tail end.
[0036] When disassembling this reaming bit, first cut the iron wire 6, and then move two connecting blocks 4 in sequence along the length direction of the drill pipe 1 so that the clamping block 41 is separated from the clamping groove 40, thereby completing the disassembly of the two connecting blocks 4, and the remaining one connecting block 4 can be directly separated from the drill pipe 1.
[0037] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other.
[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A reaming bit is connected to a drill pipe (1) with a non-circular cross-sectional outer contour. An abutting surface (10) is provided on the outer side wall of the drill pipe (1). The abutting surface (10) is perpendicular to the central axis of the drill pipe (1). The upper end of the drill pipe (1) is connected to a drilling bit, and the lower end of the drill pipe (1) is drivingly connected to the rotational output end of a drilling rig. It is characterized in that, It includes a drill bit body, and the drill bit body includes drill teeth (2), drill wings (3) and a plurality of connecting blocks (4) detachably fixed together. The drill teeth (2) are fixed on the drill wings (3), the drill wings (3) are fixed on the connecting blocks (4), and the plurality of connecting blocks (4) jointly define an installation through hole. The shape of the installation through hole is the same as the outer contour of the cross section of the drill pipe (1). The drill pipe (1) is tightly inserted into the installation through hole. The connecting block (4) can be in contact with the contact surface (10). The maximum distance from the drill teeth (2) to the rod center line of the drill pipe (1) is greater than the drilling diameter of the drilling bit.
2. The reaming bit according to claim 1, wherein An annular contact surface (10) is coaxially provided on the outer side wall of the drill pipe (1). The plurality of connecting blocks (4) are evenly arranged along the circumferential direction of the drill pipe (1). The lower side walls of the plurality of connecting blocks (4) can be in contact with the contact surface (10) simultaneously. One drill wing (3) is fixed on each connecting block (4). The drill teeth (2) are provided in plurality and are respectively fixed on the plurality of drill wings (3).
3. The reaming bit according to claim 2, characterized in that, At both ends of the connecting block (4), a clamping groove (40) and a clamping block (41) are respectively provided. The clamping groove (40) penetrates through the upper and lower side walls of the connecting block (4). The groove length direction of the clamping groove (40) can be the same as the rod length direction of the drill pipe (1). A clamping block (41) can be tightly fitted into an adjacent clamping groove (40). Every two adjacent connecting blocks (4) are clamped through the clamping block (41) and the clamping groove (40).
4. The reaming bit according to claim 2, wherein, There are three connecting blocks (4).
5. The reaming bit according to claim 2, wherein, One limiting block (5) is fixed on each connecting block (4). A connecting through hole (50) is opened on the limiting block. The head end of the iron wire (6) is tied to its tail end after sequentially passing through the plurality of connecting through holes (50).