Rotary drilling combined drill bit for rock stratum
By designing a rotary drilling combination drill bit with multi-layer carbide blocks and drill body structures, the problem of the existing drill bits being single-function under complex geological conditions is solved, and efficient drilling in soft soil, pebbles and hard rock formations is achieved, and construction efficiency and drill bit stability are improved.
Patent Information
- Application Number
- CN202422362347.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-27
AI Technical Summary
Existing drill bits are often designed for specific geological conditions and have a relatively single function. Under complex and changing geological conditions, such as soft soil, pebbles and hard rocks are present in the strata. Existing drill bits cannot effectively cope with all these conditions and require frequent replacement of drill bits to reduce construction efficiency.
A rotary drilling combination drill bit for rock formations is designed, including a multi-layer cylinder drill with carbide blocks, with drill body structure, bucket teeth and tooth shaft teeth set, combined with inclined arc blocks and diversion grooves to enhance the cutting, toggling and grinding functions of the drill bit, reduce drill slag accumulation, and improve the adaptability and stability of the drill bit.
It improves the adaptability and construction efficiency of the drill bit under different geological conditions, reduces the frequency of drill bit replacement, enhances drilling speed and stability, extends the service life of the drill bit, prevents drilling slag blockage, and improves the overall construction efficiency.
Smart Images
Figure CN223190374U_ABST
Abstract
Description
Technical Field
[0001] The invention discloses a rotary drilling combination drill bit for rock formations, which is used for rotary drilling in rock formations and belongs to the technical field of combination drill bits. Background Art
[0002] A rotary drilling rig utilizes a rotating bucket, short spiral drill bit, or other actuating devices for both wet and dry drilling. It primarily drills holes by rotating the excavator to remove soil incrementally, repeatedly cyclically. Based on their functionality, rotary drilling rigs can be categorized as single-use rotary bucket rigs or multi-function rotary drilling rigs. These rigs are suitable for a variety of substrates, boasting fast drilling speeds, minimal pollution, and high maneuverability. They are primarily used in construction in sandy, clayey, and silty soils, and are widely used in various foundation construction applications, including cast-in-place piles, diaphragm walls, and foundation reinforcement.
[0003] Rotary drilling rigs are suitable for a variety of geological conditions, including strongly weathered rock formations and weathered bedrock. The maximum construction hole diameter can reach 4.0 meters and the depth can reach 90 meters. The strength and hardness of the rock are the main factors affecting the drilling performance of the rotary drilling rig. The strength of the rock is usually expressed in terms of uniaxial compressive strength, tensile strength, and shear strength. The load per unit area when the rock is compressed and damaged by longitudinal pressure in the absence of confining pressure is called uniaxial compressive strength. Rotary drilling rigs have certain capabilities in rock drilling, but at the same time, the drill bits used are also limited by the strength and hardness of the rock and the performance of the equipment. Therefore, the existing drill bits have the following technical problems:
[0004] 1. Existing drill bits are often designed for specific geological conditions and have relatively simple functions. In complex and changing geological conditions, such as the coexistence of soft soil, pebbles, and hard rock in the strata, existing drill bits cannot effectively cope with all these conditions, requiring frequent drill bit replacement, which reduces construction efficiency.
[0005] 2. When using inappropriate drill bits for different types of strata, it may lead to slow drilling speed and high energy consumption, thereby reducing the overall construction efficiency. Utility Model Content
[0006] The purpose of the utility model is to provide a rotary drilling combination drill bit for rock formations, which solves the problem that existing drill bits are often designed for specific geological conditions and have relatively single functions. Under complex and changeable geological conditions, such as the simultaneous presence of soft soil, pebbles and hard rocks in the formation, the existing drill bits cannot effectively cope with all these conditions, and the drill bits need to be frequently replaced, thereby reducing construction efficiency.
[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0008] A rotary drilling assembly drill bit for rock formations comprises multiple layers of drill barrels with carbide blocks. In two adjacent drill barrels, one side of the carbide blocks on the inner drill barrel is higher than the other side of the carbide blocks on the outer drill barrel. A drill body structure is provided on the drill barrel on one side of one or more layers of carbide blocks. Bucket teeth and tooth shaft teeth are provided on the drill body structure. The tooth shaft teeth are arranged between the bucket teeth and are lower than the bucket teeth.
[0009] Furthermore, the drill body structure includes a plurality of arc blocks obliquely arranged on the barrel drill from inside to outside and with diameters from small to large. The arc block on the side away from the carbide block is connected to the barrel drill, and the arc block on the side close to the carbide block is separated from the barrel drill.
[0010] Furthermore, the drill body includes a plurality of arc blocks with diameters from small to large from inside to outside, a drill cutting guide groove is provided outside the connection between two adjacent arc blocks, and a guide port connected to the drill cutting guide groove is provided on the outer arc block.
[0011] Furthermore, the bucket teeth and tooth shaft teeth are arranged on the side and / or surface and / or edge of each arc block.
[0012] Furthermore, a plurality of connected connecting rods are provided on the inner wall of the barrel drill at one end of the innermost cemented carbide block, and a plurality of cemented carbide blocks are respectively provided on each connecting rod.
[0013] Furthermore, an arc-shaped reinforcement rib for forming a drill cutting diversion is provided on the outermost barrel drill, and an auxiliary reinforcement block is provided on the arc-shaped reinforcement rib.
[0014] Furthermore, a slag discharge port is provided on the barrel drill located between the two arc-shaped reinforcement ribs.
[0015] Furthermore, a guide surface is obliquely provided on the barrel drill located between the cemented carbide blocks, and the inclination angle of the guide surface is 15°-30°.
[0016] Compared with the prior art, the advantages of the present invention are:
[0017] First, the utility model provides a drill body structure on a multi-layer barrel drill with carbide blocks, and provides bucket teeth and tooth shaft teeth on the drill body structure. The tooth shaft teeth are limited to be arranged between the bucket teeth and at a height lower than the bucket teeth, thereby avoiding a single function of the drill bit and enabling the drill bit to have cutting, shifting and grinding functions. It can adapt to various geological conditions, including mixed formations of soft soil, pebbles and hard rocks, thereby reducing the frequency of drill bit replacement due to changes in geological conditions, enabling the drill bit to work effectively in formations of different depths, improving the adaptability of the drill bit, and at the same time, the drill bit can adapt to different types of formations, thereby increasing the drilling speed, reducing energy consumption, and improving overall construction efficiency.
[0018] Second, the drill body structure of the present invention is composed of arc-shaped blocks of different diameters stacked from the inside to the outside, allowing the drill bit to work effectively in strata of different depths, thereby improving drilling efficiency. At the same time, the design of the inclined arc-shaped blocks can reduce the direct contact area between the drill bit and the stratum, thereby reducing the wear of the drill bit and extending the service life of the drill bit.
[0019] 3. The utility model can effectively guide the discharge of drill cuttings from the drill hole by arranging drill cutting guide grooves and guide ports on the arc-shaped block, thereby improving the efficiency of drill cutting treatment and reducing the accumulation of drill cuttings in the drill hole, which is conducive to the continuity and efficiency of the drilling process. It can effectively prevent drill cuttings from clogging the drill hole, especially when processing soft soil layers and silty soil layers, and can reduce the problem of drill hole clogging caused by drill cuttings accumulation;
[0020] Fourth, the utility model defines the arrangement positions of the bucket teeth and the tooth shaft teeth, so that the drill bit can cut and crush simultaneously during the drilling process, thereby improving the drilling efficiency and the stability of the drill bit;
[0021] 5. The utility model provides a plurality of connecting rods on the inner wall of the drill bit at one end of the innermost carbide block, and each connecting rod is provided with a plurality of carbide blocks. By providing the connecting rods and the plurality of carbide blocks, the strength and stability of the drill bit can be enhanced, especially when drilling into hard rock, which can provide better support and impact resistance.
[0022] 6. The arc-shaped reinforcement ribs in the present invention not only enhance the stability of the drill bit, but also guide the discharge of drill cuttings from the drill hole, thereby improving the efficiency of drill cuttings treatment and reducing the accumulation of drill cuttings in the drill hole. The provision of auxiliary reinforcement blocks can further enhance the stability of the drill bit to provide better support and impact resistance.
[0023] 7. The present invention provides a slag discharge port on the drill barrel located between the two arc-shaped reinforcement ribs, which can enhance the discharge path of drill slag to avoid blockage and affect drilling efficiency;
[0024] 8. The inclined configuration of the guide surface in the present invention facilitates faster and more direct removal of drill cuttings from the borehole, reducing the time drill cuttings remain in the borehole and improving the efficiency of drill cutting removal. Limiting the inclination angle ensures that drill cuttings are removed from the borehole at a faster rate while maintaining the forward speed of the drill bit. If the angle is too small, the drill cuttings may not be removed smoothly. If the angle is too large, the forward speed of the drill bit may be affected, resulting in reduced drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0026] Figure 1 It is a structural diagram of the utility model;
[0027] Figure 2 for Figure 1 sectional view of
[0028] Figure 3 for Figure 2 Schematic diagram of part of the structure;
[0029] Figure 4 This is a schematic diagram of the structure in which auxiliary reinforcement blocks are provided on some of the arc-shaped reinforcement ribs in the present invention;
[0030] In the figure: 1-carbide block, 2-drill barrel, 3-drill body structure, 4-bucket tooth, 5-shaft tooth, 6-arc block, 7-drill slag guide groove, 8-guide port, 9-connecting rod, 10-arc reinforcement rib, 11-auxiliary reinforcement block, 12-slag discharge port, 13-guide surface. DETAILED DESCRIPTION
[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.
[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0033] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0034] In addition, the terms "first", "second", "third", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.
[0035] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0036] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0037] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.
[0038] Example 1
[0039] In order to solve the problem that existing drill bits are often designed for specific geological conditions and have relatively single functions, under complex and changing geological conditions, such as the coexistence of soft soil, pebbles and hard rocks in the strata, existing drill bits cannot effectively cope with all these conditions, and the drill bits need to be frequently replaced, thereby reducing construction efficiency. Figure 1-4As shown, a rotary drilling assembly drill bit for rock formations is provided, including a multi-layer barrel drill 2 with a carbide block 1, which can be two or three layers. In two adjacent barrel drills 2, the carbide block 1 on the inner barrel drill 2 is higher than the carbide block 1 on the outer barrel drill 2. A drill body structure 3 is provided on the barrel drill 2 on one side of one or more layers of carbide blocks 1. Bucket teeth 4 and tooth shaft teeth 5 are provided on the drill body structure 3. The tooth shaft teeth 5 are provided between the bucket teeth 4 and are lower in height than the bucket teeth 4. The tooth shaft teeth 5 can be 2mm-5mm lower than the height of the bucket teeth 4, and can also be selected according to actual needs. When the drill body structure 3 is provided on the barrel drill 2 on one side of the multi-layer carbide blocks 1, the drill body structures 3 on the adjacent layers are staggered (such as Figure 1 The purpose is to facilitate better cutting, stirring and grinding, and to facilitate the diversion of drill cuttings.
[0040] In practice, the drill bit in this embodiment is installed on a rotary drilling rig. After installation, holes are drilled at fixed locations. The barrel drill serves as the main body of the drill bit, and a cemented carbide is provided on it, which is suitable for grinding hard rock layers. The bucket teeth can be used to cut softer formations, such as soil, silt and fine sand layers. When encountering pebbles or gravel, the bucket teeth can play a shifting role to help loosen and remove these hard particles, thereby avoiding direct cutting of hard materials. The tooth shaft teeth are located between the bucket teeth and are less in height than the bucket teeth. While the bucket teeth are cutting and shifting, the rock can be ground at a deeper level. In this embodiment, a drill body structure is provided on a multi-layer barrel drill with carbide blocks, bucket teeth and tooth shaft teeth are provided on the drill body structure, and the tooth shaft teeth are limited to be provided between the bucket teeth and at a height lower than the bucket teeth, thereby avoiding a single function of the drill bit and enabling the drill bit to have cutting, shifting and grinding functions, and being able to adapt to a variety of geological conditions, including mixed formations of soft soil, pebbles and hard rocks, thereby reducing the frequency of drill bit replacement due to changes in geological conditions, enabling the drill bit to work effectively in formations of different depths, improving the adaptability of the drill bit, and at the same time, the drill bit can adapt to different types of formations, thereby increasing the drilling speed, reducing energy consumption, and thus improving the overall construction efficiency.
[0041] Example 2
[0042] Based on Example 1, the drill body structure 3 includes a plurality of arcuate blocks 6 arranged obliquely on the drill bit 2 from the inside out and with increasing diameters. These blocks can be partially arcuate structures within a circle or ellipse. In the case of an ellipse, the diameter can be arbitrarily selected as needed, extending from a straight line passing through the center of the ellipse. The arcuate blocks 6 on the side away from the carbide block 1 are connected to the drill bit 2, while the arcuate blocks 6 on the side closer to the carbide block 1 are separated from the drill bit 2. The drill body structure is formed by stacking arcuate blocks of varying diameters from the inside out, allowing the drill bit to operate effectively in formations of varying depths, thereby improving drilling efficiency. Furthermore, the obliquely arranged arcuate blocks reduce the area of direct contact between the drill bit and the formation, thereby reducing wear on the drill bit and extending its service life.
[0043] Example 3
[0044] On the basis of Example 2, a drill cutting guide groove 7 is provided outside the connection between two adjacent arc-shaped blocks 6, and a guide port 8 connected to the drill cutting guide groove 7 is provided on the outer arc-shaped block 6. By providing the drill cutting guide groove and the guide port on the arc-shaped block, the drill cuttings cut, moved and ground on the carbide block 1, bucket teeth and tooth shaft teeth are effectively guided and discharged from the borehole, thereby improving the efficiency of drill cutting treatment, reducing the accumulation of drill cuttings in the borehole, and facilitating the continuity and efficiency of the drilling process. It can effectively prevent the blockage of drill cuttings in the borehole, especially when processing soft soil layers and silty soil layers, and can reduce the problem of borehole blockage caused by the accumulation of drill cuttings.
[0045] Example 4
[0046] Based on Example 3, the bucket teeth 4 and the tooth shaft teeth 5 are arranged on the side and / or surface and / or edge of each arc-shaped block 6. This defined placement of the bucket teeth and the tooth shaft teeth enables the drill bit to simultaneously cut and crush during drilling, improving drilling efficiency and enhancing drill bit stability. Of course, other arrangements are possible in practice.
[0047] Example 5
[0048] On the basis of Example 4, a plurality of connected connecting rods 9 are provided on the inner wall of the barrel drill 2 at one end of the innermost carbide block 1, and a plurality of carbide blocks 1 are provided on each connecting rod 9. By providing the connecting rods and the plurality of carbide blocks, the strength and stability of the drill bit can be enhanced, especially when drilling into hard rock, which can provide better support and impact resistance.
[0049] Example 6
[0050] On the basis of Example 5, an arc-shaped reinforcement rib 10 for forming a drill cutting diversion is provided on the outermost barrel drill 2, and an auxiliary reinforcement block 11 is provided on the arc-shaped reinforcement rib 10. The arc-shaped reinforcement rib can not only enhance the stability of the drill bit, but also guide the drill cuttings to be discharged from the drill hole, thereby improving the efficiency of drill cutting treatment and reducing the accumulation of drill cuttings in the drill hole. The setting of the auxiliary reinforcement block can further enhance the stability of the drill bit to provide better support and impact resistance.
[0051] Example 7
[0052] Based on Example 6, a slag discharge port 12 is provided on the drill shank 2 between the two arc-shaped reinforcement ribs 10. The slag discharge port provided on the drill shank between the two arc-shaped reinforcement ribs can enhance the discharge path of the drill slag to avoid blockage and affect the drilling efficiency.
[0053] Example 8
[0054] Based on Example 7, a guide surface 13 is provided on the drill bit 2 between the cemented carbide blocks 1, with an inclination angle of 15°-30°, such as 18°, 20°, 22°, 25°, or 28°. The inclined guide surface facilitates faster and more direct removal of drill cuttings from the borehole, reducing the dwell time of the cuttings in the borehole and improving the efficiency of cuttings handling. Limiting the inclination angle ensures that the cuttings are removed from the borehole at a faster rate while maintaining the forward speed of the drill bit. If the angle is too small, the cuttings may be difficult to remove smoothly. If the angle is too large, the forward speed of the drill bit may be affected, resulting in reduced drilling efficiency.
Claims
1. A rotary drilling assembly drill bit for rock formations, characterized by: The invention comprises a barrel drill (2) with multiple layers of hard alloy blocks (1). In two adjacent barrel drills (2), one side of the hard alloy block (1) on the inner barrel drill (2) is higher than one side of the hard alloy block (1) on the outer barrel drill (2). A drill body structure (3) is provided on the barrel drill (2) on one side of one or more layers of hard alloy blocks (1). Bucket teeth (4) and tooth shaft teeth (5) are provided on the drill body structure (3). The tooth shaft teeth (5) are provided between the bucket teeth (4) and are lower in height than the bucket teeth (4).
2. The rotary drilling assembly drill bit for rock formations according to claim 1, characterized in that: The drill body structure (3) comprises a plurality of arc-shaped blocks (6) arranged obliquely on the drill tube (2) from the inside to the outside and with diameters from small to large. The arc-shaped block (6) on the side away from the carbide block (1) is connected to the drill tube (2), and the arc-shaped block (6) on the side close to the carbide block (1) is separated from the drill tube (2).
3. The rotary drilling assembly drill bit for rock formations according to claim 2, characterized in that: A drill cutting guide groove (7) is provided outside the connection between two adjacent arc-shaped blocks (6), and a guide port (8) connected to the drill cutting guide groove (7) is provided on the outer arc-shaped block (6).
4. The rotary drilling assembly drill bit for rock formations according to claim 3, characterized in that: The bucket teeth (4) and the tooth shaft teeth (5) are arranged on the side surface and / or the surface and / or the edge of each arc block (6).
5. The rotary drilling assembly drill bit for rock formations according to claim 4, characterized in that: A plurality of connected connecting rods (9) are arranged on the inner wall of the barrel drill (2) at one end of the innermost hard alloy block (1), and a plurality of hard alloy blocks (1) are respectively arranged on each connecting rod (9).
6. A rotary drilling assembly drill bit for rock formations according to any one of claims 1 to 5, characterized in that: An arc-shaped reinforcement rib (10) for forming a drill cutting diversion is provided on the outermost barrel drill (2), and an auxiliary reinforcement block (11) is provided on the arc-shaped reinforcement rib (10).
7. The rotary drilling assembly drill bit for rock formations according to claim 6, characterized in that: A slag discharge port (12) is provided on the barrel drill (2) located between the two arc-shaped reinforcement ribs (10).
8. The rotary drilling assembly drill bit for rock formations according to claim 1, characterized in that: A guide surface (13) is obliquely provided on the barrel drill (2) located between the hard alloy blocks (1), and the inclination angle of the guide surface is 15°-30°.