Diamond drilling bit with detachable drill teeth

Abstract

The utility model relates to a diamond drilling bit with detachable drill teeth, which comprises a bit main body consisting of a threaded head, a connecting steel sleeve and a bit matrix which are connected in sequence, and a drilling cutting component capable of forming a drilling tooth structure distributed in a staggered dot matrix manner in a circular ring plane is detachably mounted at the bottom of the bit matrix. The outer side face of the drill bit matrix is further detachably provided with a broaching cutting assembly capable of constructing a broaching tooth structure distributed in a staggered dot matrix mode. A liquid drainage assembly which is communicated with the liquid conveying pipe cavity and located in the inner center area of the annular drilling tooth structure formed by the drilling cutting assembly is further inserted in the bottom face, away from the connecting steel sleeve, of the drill bit matrix. According to the drill bit, the drill teeth and the drill bit blank body are arranged to be of an assembly structure which can be conveniently disassembled and assembled and is stable in stress, so that the structural stability of the drill bit is guaranteed, and the disassembly, assembly and replacement efficiency and convenience of the drill teeth are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to detachable drilling bit technical field, especially relate to a kind of diamond drilling bit of detachable drill tooth. BACKGROUND

[0002] Drilling refers to the use of drilling tools from the ground down, to form a cylindrical borehole in the stratum, to identify and divide strata. As one of the most important drilling tools in drilling operations, the quality of the drill bit determines the drilling speed and drilling cost. With the development of drilling engineering, the drilling depth is getting deeper and deeper, so the quality requirements of drilling bits have improved, and the wear rate of drilling bits has also accelerated. In order to improve the durability of the drill bit, diamond drilling bits have been widely used in drilling processing field. Diamond drilling bits are sintered from diamond powder and hard alloy substrate under ultra-high pressure and high temperature, which has high hardness, wear resistance and thermal conductivity of diamond, and also has the strength and impact toughness of hard alloy, making it an ideal material for manufacturing cutting tools, drilling bits and other wear-resistant tools.

[0003] With the increase of stratum depth and the change of stratum composition, the pressurized feeding of continuous drilling of drilling tools can cause severe friction between the drill bit and high-hardness rock stratum. Long-term drilling work can cause the drill bit to wear, affecting drilling efficiency and service life. However, the existing drilling bits usually fix the drill bit blank and the drill tooth, so that when the drill bit wears, most of the drill bit blank and the drill tooth cannot be disassembled and replaced, and a small part of the drill tooth and the drill bit blank that can be disassembled use high-strength and high-stability connection methods to ensure the stability of the structure, which makes it difficult to disassemble and causes the connection structure to be easily damaged during drilling, so it cannot be effectively disassembled and replaced multiple times, greatly reducing the overall service life of the drill bit blank and increasing the maintenance and replacement cost. Moreover, the connection method of the existing drill tooth and drill bit blank also makes it difficult to disassemble and replace, greatly reducing the efficiency and convenience of disassembly and replacement. SUMMARY

[0004] The utility model aims at providing a kind of diamond drilling bit of detachable drill tooth, which sets drill tooth and drill bit blank as the assembly structure that can be conveniently disassembled and stressed stably to ensure the structural stability of the drill bit and improve the efficiency and convenience of disassembly and replacement of drill tooth, to solve the problem that the drill bit blank and drill tooth of the existing drilling bit are assembled by fixed connection method, which makes it impossible to disassemble, maintain and replace parts after the drill bit wears, resulting in high use cost, and the disassembly and replacement of the existing detachable assembly of drill tooth and drill bit blank are complicated and difficult, which is not convenient for disassembly and maintenance, and reduces the efficiency and convenience of disassembly and replacement.

[0005] The utility model discloses a technical scheme adopted is: a kind of drill bit of diamond drilling, including the drill bit main body by sequentially connected threaded head, connecting steel sleeve and drill bit matrix, drill bit matrix's bottom detachably install the drill bit cutting assembly of drill bit structure that can form staggered point array distribution in annular plane, and the outer side surface of drill bit matrix also detachably set up the reaming cutting assembly of reaming tooth structure that can construct staggered point array distribution;On the bottom surface of drill bit matrix, away from connecting steel sleeve, still insert and install with the drainage assembly that liquid delivery pipe cavity is communicated and is in the inner central area of annular drill bit structure formed by drill bit cutting assembly.

[0006] According to a preferred embodiment, two coaxial outer and inner embedded ring grooves are formed on the bottom surface of the drill bit matrix, and an insertion slot is centrally formed on the bottom surface of the drill bit matrix; a plurality of positioning side slot holes for positioning the installation positions of the reaming cone teeth of the reaming cutting assembly are formed on the outer side surface of the drill bit matrix in a staggered point array distribution manner.

[0007] According to a preferred embodiment, connecting screw holes for connecting the drill bit cutting assembly are formed on the groove bottom surfaces of the outer and inner embedded ring grooves; side drainage through holes that are distributed alternately with the positioning side slot holes and are communicated with the liquid delivery pipe cavity are formed on the outer side surface of the drill bit matrix.

[0008] According to a preferred embodiment, the drill bit cutting assembly includes outer ring drill teeth and inner ring drill teeth, wherein a plurality of the outer ring drill teeth are embedded in the outer embedded ring groove in a manner of forming a ring body structure by butt-jointing the first and last ones; a plurality of the inner ring drill teeth are also embedded in the inner embedded ring groove in a manner of forming a ring body structure by butt-jointing the first and last ones.

[0009] According to a preferred embodiment, the outer ring drill teeth include an outer tooth body, an outer fan ring bottom plate, and an outer connecting screw rod, wherein the outer tooth body is mounted on the outer fan ring bottom plate, and a plurality of the outer fan ring bottom plates can form a ring-shaped plate body capable of filling the outer embedded ring groove in a manner of butt-jointing the first and last ones; the outer connecting screw rod is inserted into the outer fan ring bottom plate.

[0010] According to a preferred embodiment, a plurality of inner fan ring bottom plates of the inner ring drill teeth are embedded in the inner embedded ring groove in a manner of cooperatively splicing into a ring-shaped plate body, and an inner tooth body is arranged on the surface of the inner fan ring bottom plate away from the inner embedded ring groove; an inner connecting screw rod capable of being placed into the connecting screw hole to define the working position of the inner fan ring bottom plate in the inner embedded ring groove is inserted into the inner fan ring bottom plate.

[0011] According to a preferred embodiment, the reaming cutting assembly comprises a limiting ring sleeve sleeved on the drill bit matrix and the reaming cone teeth embedded in the positioning side slot hole.

[0012] According to a preferred embodiment, the limiting ring sleeve comprises an inserted reaming slot corresponding to the positioning side slot hole and a through limiting slot, and the inserted reaming slot is below and in communication with the through limiting slot.

[0013] According to a preferred embodiment, the reaming cone teeth are composed of a coaxially butted embedded cylinder and a pyramid tooth body, and a side opening slot capable of defining an assembly station in cooperation with the through limiting slot is further formed on the side of the embedded cylinder.

[0014] The beneficial effects of the present application are:

[0015] The drilling cutting assembly and the reaming cutting assembly provided by the present application can be installed on the drill bit matrix in a detachable manner, so that individual disassembly and replacement can be performed according to the wear condition, the cost of drill bit wear replacement is reduced, the convenience of disassembly and replacement is improved, and the comprehensive service life of the drill bit matrix is improved. The outer ring drilling teeth and the inner ring drilling teeth provided by the present application form a ring tooth structure through head-to-tail connection, so that the stress of a single outer ring drilling tooth and a single inner ring drilling tooth is transmitted to the downstream outer ring drilling tooth and the downstream inner ring drilling tooth under the decomposition and guidance of the ring groove during the drilling rotation, so that the force decomposition is continuously reduced in a ring surface, thereby effectively ensuring the stability of the structure and the form retention of the embedded ring groove. Compared with the existing single-groove inserted assembly, the form retention capability of the outer embedded ring groove 1 and the inner embedded ring groove on the drill bit matrix is improved, the durability of the drill bit matrix is improved, so that only the single outer ring drilling tooth and / or the single inner ring drilling tooth need to be replaced according to the actual wear condition when the drill bit wears, the difficulty and maintenance cost of disassembly and replacement are reduced. The reaming cutting assembly provided by the present application can improve the convenience of disassembly and assembly through the clamping groove limiting manner, reduce the difficulty of disassembly and assembly, and realize the feasibility of single component replacement. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a preferred structure schematic view of the diamond drilling drill bit with detachable drill teeth provided by the present application;

[0017] Figure 2 is a preferred bottom plane schematic view of the drill bit matrix of the diamond drilling drill bit with detachable drill teeth provided by the present application;

[0018] Figure 3 is a preferred partial expanded plane schematic view of the limiting ring sleeve of the diamond drilling drill bit with detachable drill teeth provided by the present application;

[0019] Figure 4 The utility model provides a kind of preferred structure diagram of reaming cone tooth of detachable diamond drilling drill head of drill tooth.

[0020] List of reference signs

[0021] 1: drill head body;2: drilling cutting assembly;3: reaming cutting assembly;4: liquid discharge assembly;11: threaded head;12: connecting steel sleeve;13: drill head matrix;14: liquid delivery lumen;131: outer embedded ring groove;132: inner embedded ring groove;133: plug-in slot;134: positioning side slot hole;135: connecting screw hole;136: side liquid discharge through hole;21: outer ring drilling tooth;22: inner ring drilling tooth;211: outer tooth body;212: outer fan ring bottom plate;213: outer connecting screw;221: inner tooth body;222: inner fan ring bottom plate;223: inner connecting screw;31: limiting ring sleeve;32: reaming cone tooth;311: plug-in reaming groove;312: through limiting groove;313: V-shaped inclined groove;321: embedded column;322: pyramid tooth body;3211: side opening groove;41: hollow threaded column;42: liquid discharge hemispherical head;43: one-way liquid discharge nozzle. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the utility model will be briefly introduced with the description of the drawings and embodiments or prior art, and obviously, the following description of the structure of the drawings is only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for the ordinary skilled in the art.

[0023] The technical scheme provided by the utility model will be described in detail by embodiment mode with reference to the drawings. It needs to be explained here that the description of these embodiment modes is used to help understanding the utility model, and does not constitute the limitation to the utility model. In some examples, since some embodiments belong to prior art or conventional technology, they are not described or not described in detail.

[0024] The following will be described in detail with reference to the drawings.

[0025] Embodiment 1

[0026] The application provides a kind of detachable diamond drilling drill head of drill tooth, it includes drill head body 1, drilling cutting assembly 2, reaming cutting assembly 3 and liquid discharge assembly 4.

[0027] According to Figures 1-4In the shown specific embodiment, the drill bit body 1 is composed of a threaded head 11, a connecting steel sleeve 12 and a drill bit matrix 13 connected in sequence. A drilling cutting assembly 2 capable of forming a staggered point array distribution in the annular plane is detachably installed at the bottom of the drill bit matrix 13. A reaming cutting assembly 3 capable of constructing a staggered point array distribution in the annular plane is also detachably arranged on the outer side of the drill bit matrix 13. A drainage assembly 4 communicating with the fluid delivery lumen 14 is also inserted on the bottom surface of the drill bit matrix 13 away from the connecting steel sleeve 12. The drainage assembly 4 is arranged in the inner central area of the annular drilling tooth structure formed by the drilling cutting assembly 2 in a manner of outputting drilling fluid radially outward in the cross-sectional circular plane to cool the drilling cutting assembly 2. The drilling cutting assembly 2 and the reaming cutting assembly 3 provided in the present application can be detachably installed on the drill bit matrix 13, so that they can be individually disassembled and replaced according to the wear condition, thereby reducing the cost of drill bit wear replacement, improving the convenience of disassembly and replacement, and improving the overall service life of the drill bit matrix 13.

[0028] Preferably, two coaxial outer embedded ring grooves 131 and inner embedded ring grooves 132 are formed on the bottom surface of the drill bit matrix 13 to install the drilling cutting assembly 2. Preferably, a plug-in slot 133 for installing the drainage assembly 4 is also centrally formed on the bottom surface of the drill bit matrix 13. Preferably, a plurality of positioning side slot holes 134 for positioning the installation position of the reaming bevel teeth 32 of the reaming cutting assembly 3 are formed on the outer side of the drill bit matrix 13 in a staggered point array distribution. Preferably, the slot hole bottom surface of the positioning side slot hole 134 is provided with a magnetic piece. Preferably, a plurality of connecting screw holes 135 for connecting the drilling cutting assembly 2 are formed on the bottom surface of the outer embedded ring groove 131 and the inner embedded ring groove 132. Preferably, a plurality of side drainage through holes 136 staggered with the positioning side slot holes 134 and communicating with the fluid delivery lumen 14 are also formed on the outer side of the drill bit matrix 13. Specifically, a limiting screw hole is also formed on the outer side of the drill bit matrix 13. The drill bit matrix 13 provided in the present application can ensure the stability of the connection and the convenience of disassembly through embedding and auxiliary bolt limiting, especially improving the simplicity of drill bit disassembly, facilitating individual replacement when the drill bit is worn, thereby reducing maintenance and replacement costs. In addition, the ring groove structure provided on the drill bit matrix 13 greatly reduces the impact of the drill bit on the drill bit matrix 13 during drilling, so that the force on the drill bit is sequentially transmitted on a ring structure to attenuate the impact on the ring groove wall, reducing the risk of ring groove deformation.

[0029] Preferably, the cavity forming the delivery pipe cavity 14 is constructed in a manner that penetrates through the threaded head 11 and the connecting steel sleeve 12 and extends into the reaming cutting assembly 3. Further preferably, the delivery pipe cavity 14 can be in communication with the insertion slot 133 provided on the bottom surface of the drill bit blank 13 for mounting the discharge assembly 4, so as to deliver the drilling fluid to the discharge assembly 4. When the threaded head 11 is connected with the drill rod, the delivery pipe cavity 14 can be connected with the external drilling fluid supply system through the internal pipe of the drill rod, so as to continuously and controllably deliver the drilling fluid, so that the drilling fluid can be output from the discharge assembly 4 and the side discharge through hole 136, so as to continuously lubricate and cool the drill bit, improve the stability and temperature of the drill bit during drilling, and prolong the service life of the drill bit.

[0030] Preferably, the drilling cutting assembly 2 comprises outer ring drilling teeth 21 and inner ring drilling teeth 22. Preferably, a plurality of outer ring drilling teeth 21 are embedded in the outer embedded ring groove 131 in a manner that the first and the last are connected to form a ring structure. Preferably, a plurality of inner ring drilling teeth 22 are also embedded in the inner embedded ring groove 132 in a manner that the first and the last are connected to form a ring structure. The outer ring drilling teeth 21 and the inner ring drilling teeth 22 provided in the present application form a ring body drill bit structure by connecting the first and the last, so that the force of a single outer ring drilling tooth 21 and an inner ring drilling tooth 22 during drilling rotation is transmitted to the downstream outer ring drilling tooth 21 and the inner ring drilling tooth 22 under the decomposition guidance of the ring groove, so as to realize continuous force decomposition in a ring surface, thereby effectively ensuring the stability of the structure and the form retention of the embedded ring groove. Compared with the existing single groove insertion assembly, the form retention ability of the outer embedded ring groove 131 and the inner embedded ring groove 132 on the drill bit blank 13 is improved, so that the durability of the drill bit blank 13 is improved, thereby only the replacement of a single outer ring drilling tooth 21 and / or an inner ring drilling tooth 22 is needed according to the actual wear condition when the drill bit wears, which reduces the difficulty of disassembly and replacement and the maintenance cost. The present application constructs the outer ring drilling tooth 21 and / or the inner ring drilling tooth 22 into a ring body drill bit structure, thereby effectively reducing the impact strength of the conventional drill bit single clamping groove embedded on the drill bit blank 13, so that the deformation speed of the drill bit blank 13 is slowed down, the service life is improved, and the replacement frequency of the drill bit blank 13 is reduced.

[0031] Preferably, the outer ring drilling teeth 21 comprise outer tooth bodies 211, outer fan ring bottom plates 212, outer connecting screw rods 213. Preferably, the outer tooth bodies 211 are mounted on the outer fan ring bottom plates 212. Further preferably, a plurality of outer fan ring bottom plates 212 can form a ring-shaped plate body capable of filling the outer embedded ring groove 131 in a head-to-tail manner, so that a plurality of outer tooth bodies 211 form a ring-shaped outer drilling tooth structure in a ring-directional interval arrangement. Preferably, the outer connecting screw rods 213 are inserted in a concealed mounting manner on the outer fan ring bottom plates 212. Specifically, the outer connecting screw rods 213 can be inserted into the connecting screw holes 135 to define the working position of the fan-shaped bottom plate 212 on the bit body 13. Preferably, the concealed mounting refers to that the plate body of the outer fan ring bottom plate 212 is provided with a slot hole accommodating the outer connecting screw rod 213, so that the outer connecting screw rod 213 is embedded in the plate body to avoid collision between the outer connecting screw rod 213 and the rock mass during rotation, reduce the risk and possibility of deformation of the outer connecting screw rod 213, and improve the service life of the accessory.

[0032] Preferably, a plurality of inner fan ring bottom plates 222 of the inner ring drilling teeth 22 are embedded in the inner embedded ring groove 132 in a manner of being cooperatively spliced into a ring-shaped plate body. Further preferably, the inner fan ring bottom plates 222 are provided with inner tooth bodies 221 away from the surface of the inner embedded ring groove 132, so that a plurality of inner tooth bodies 221 form a ring-shaped inner drilling tooth structure in a ring-directional interval arrangement. Preferably, the inner connecting screw rods 223 are inserted on the inner fan ring bottom plates 222 and can be placed into the connecting screw holes 135 to define the working position of the inner fan ring bottom plate 222 in the inner embedded ring groove 132. Preferably, the inner fan ring bottom plates 222 are also provided with slot holes accommodating the inner connecting screw rods 223. Specifically, the inner ring drilling teeth 22 have a similar structure to the outer ring drilling teeth 21, thereby effectively decomposing the impact force in the drilling rotation direction and achieving the same effect.

[0033] Preferably, the inner tooth bodies 221 and the outer tooth bodies 211 are arranged in a staggered manner according to different radius lines on the plane of the circular ring, so that the outer tooth bodies 211 are located in the fan-shaped area defined by the radius line corresponding to the interval gap between two adjacent inner tooth bodies 221, and the inner tooth bodies 221 are also located in the fan-shaped area defined by the radius line corresponding to the interval gap between two adjacent outer tooth bodies. Preferably, the radially outer side of the inner tooth body 221 and the radially inner side of the outer tooth body 211 are provided with an additive structure body capable of being located between adjacent two outer tooth bodies 211 or inner tooth bodies 221, thereby improving the stability of the structure and the stability of the tooth body shape, ensuring the durability of drilling, and reducing the risk of deformation of the drilling teeth.

[0034] Preferably, the reaming cutting assembly 3 comprises a limiting ring 31 sleeved on the drill bit matrix 13 and a reaming cone 32 penetrating through the limiting ring 31 and embedded in the positioning side slot hole 134. Preferably, the limiting ring 31 comprises a plug-in reaming slot 311 corresponding to the positioning side slot hole 134 and a penetrating limiting slot 312. Preferably, the plug-in reaming slot 311 is below the penetrating limiting slot 312 and communicates with the penetrating limiting slot 312. Preferably, a V-shaped inclined slot 313 capable of communicating with the side liquid discharge through hole 136 is further formed on the shell wall of the limiting ring 31. Preferably, a stepped penetrating hole capable of inserting a limiting screw is further formed on the top side wall of the limiting ring 31, so that the limiting screw embedded in the stepped penetrating hole defines the relative assembly position of the limiting ring 31 and the drill bit matrix 13 in the manner of being inserted into the limiting screw hole formed on the outer side of the drill bit matrix 13. The limiting ring 31 provided in the application can define the assembly position of the reaming cone 32 by axial movement, thereby improving the convenience and efficiency of batch disassembly of the reaming cone 32. The limiting ring 31 provided in the application can be moved so that the middle section of the reaming cone 32 is inserted into the plug-in reaming slot 311 and the penetrating limiting slot 312 to define the disassembly working condition and the limiting connection working condition of the reaming cone 32. The V-shaped inclined slot 313 is provided with a penetrating hole in the groove bottom surface to communicate with the side liquid discharge through hole 136 to controllably output drilling fluid from the side of the drill bit matrix 13 to lubricate and cool the reaming cone 32. The gradually converging groove cavity of the V-shaped inclined slot 313 can reduce the risk of rock layer adhering to the groove cavity to block the drilling fluid output hole and improve the smoothness of drilling fluid output. In addition, the stepped penetrating hole is provided to define the relative position between the limiting ring 31 and the reaming cone 32 embedded in the positioning side slot hole 134, so that the limiting ring 31 can clamp the reaming cone 32 to ensure the stability of the reaming cone 32 installation.

[0035] Preferably, the reaming cone 32 is composed of a coaxially butted embedded cylinder 321 and a pyramid tooth body 322. Preferably, a side opening slot 3211 capable of defining an assembly station in cooperation with the penetrating limiting slot 312 is further formed on the side surface of the embedded cylinder 321. Preferably, a magnetic metal sheet capable of facilitating positioning and inserting the embedded cylinder 321 into the positioning side slot hole 134 is arranged on the bottom surface of the embedded cylinder 321 away from the pyramid tooth body 322.

[0036] The dismounting mode of the reaming cutting assembly 3 is that the limiting ring sleeve 31 is sleeved on the drill bit body 13, and the plug-in reaming groove 311 of the limiting ring sleeve 31 is aligned and communicated with the positioning side groove hole 134. Then, the reaming bevel gear 32 is inserted into the plug-in reaming groove 311 so that the embedded cylinder 321 part is embedded into the positioning side groove hole 134, and the magnetic metal sheet on the embedded cylinder 321 is magnetically adsorbed with the magnetic sheet on the groove hole bottom surface of the positioning side groove hole 134, so as to keep the embedded posture of the reaming bevel gear 32. The limiting ring sleeve 31 is lowered so that the embedded cylinder 321 slides into the through limiting groove 312, thereby realizing the limiting plug-in of the reaming bevel gear 32, and then the relative position of the limiting ring sleeve 31 on the drill bit body 13 is locked by the screw, so that the limiting ring sleeve 31 limits the assembly position of the reaming bevel gear 32.

[0037] Preferably, the liquid discharge assembly 4 comprises a hollow threaded column 41, a liquid discharge hemispherical head 42 and a one-way liquid discharge nozzle 43. Preferably, the hollow threaded column 41 is detachably plugged into the plug-in groove 133. The bottom end of the hollow threaded column 41 is connected with the liquid discharge hemispherical head 42. Further preferably, the liquid discharge hemispherical head 42 is provided with a hemispherical cavity communicated with the hollow threaded column 41 and a divergent liquid discharge pipe cavity communicated with the hemispherical cavity and formed on the circumferential path of the interval liquid discharge port, so that the liquid discharge hemispherical head 42 can realize the divergent annular output of the liquid discharge channel. Preferably, the one-way liquid discharge nozzle 43 capable of limiting the one-way flow of the drilling fluid is further embedded at the outlet of the divergent liquid discharge pipe cavity of the liquid discharge hemispherical head 42.

[0038] The utility model is not limited to the above optional implementation, anyone can draw other various forms of product under the enlightenment of the utility model, but no matter make any change in its shape or structure, all technical schemes falling into the scope defined by the claims of the utility model, fall into the protection scope of the utility model. The person skilled in the art should understand that the utility model specification and its drawings are illustrative and not constitute the limitation of the claims. The protection scope of the utility model is defined by the claims and its equivalents. In the full text, the features guided by "preferably" are only an optional way, and should not be understood as necessarily setting, therefore the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A detachable diamond drilling bit, comprising a bit body (1) composed of a threaded head (11), a connecting steel sleeve (12) and a bit matrix (13) connected in sequence, characterized in that, a drilling cutting assembly (2) capable of forming a dislocation lattice distribution in a circular plane is detachably mounted on the bottom of the bit matrix (13), and a reaming cutting assembly (3) capable of constructing a dislocation lattice distribution of reaming tooth structure is also detachably arranged on the outer side of the bit matrix (13); a drainage assembly (4) communicating with the liquid delivery lumen (14) and located in the inner central area of the annular drilling tooth structure formed by the drilling cutting assembly (2) is also inserted into the bottom surface of the bit matrix (13) away from the connecting steel sleeve (12).

2. The detachable diamond drill bit of claim 1, wherein, Two coaxial outer and inner embedded ring grooves (131) and (132) are provided on the bottom surface of the bit matrix (13), and a plug-in slot (133) is also centrally provided on the bottom surface of the bit matrix (13); A plurality of positioning side slot holes (134) for positioning the installation position of the reaming bevel teeth (32) of the reaming cutting assembly (3) are also provided in a dislocation lattice distribution manner on the outer side of the bit matrix (13).

3. The detachable diamond drill bit of claim 2, wherein, Connecting screw holes (135) for connecting the drilling cutting assembly (2) are provided on the groove bottom surfaces of the outer and inner embedded ring grooves (131) and (132) at intervals; Side drainage through holes (136) staggered with the positioning side slot holes (134) and communicating with the liquid delivery lumen (14) are also provided on the outer side of the bit matrix (13).

4. The detachable diamond drill bit of claim 3, wherein, The drilling cutting assembly (2) comprises outer ring drilling teeth (21) and inner ring drilling teeth (22), wherein, A plurality of the outer ring drilling teeth (21) are embedded in the outer embedded ring groove (131) in a ring structure formed by butt jointing the first and last ends; A plurality of the inner ring drilling teeth (22) are also embedded in the inner embedded ring groove (132) in a ring structure formed by butt jointing the first and last ends.

5. The detachable diamond drill bit of claim 4, wherein, The outer ring drilling teeth (21) comprise an outer tooth body (211), an outer fan ring bottom plate (212) and an outer connecting screw (213), wherein, The outer tooth body (211) is mounted on the outer fan ring bottom plate (212), and a plurality of the outer fan ring bottom plates (212) can form a ring-shaped plate body capable of filling the outer embedded ring groove (131) by butt jointing the first and last ends; The outer connecting screw (213) is inserted into the outer fan ring bottom plate (212).

6. The detachable diamond drill bit of claim 5, wherein, A plurality of inner fan ring bottom plates (222) of the inner ring drilling teeth (22) are embedded in the inner embedded ring groove (132) in a manner of cooperatively splicing into a ring-shaped plate body, and the inner fan ring bottom plate (222) is provided with an inner tooth body (221) on the surface away from the inner embedded ring groove (132); An inner connecting screw (223) capable of being placed into the connecting screw hole (135) to define the working position of the inner fan ring bottom plate (222) in the inner embedded ring groove (132) is inserted into the inner fan ring bottom plate (222).

7. The detachable diamond drill bit of claim 6, wherein, The reaming cutting assembly (3) comprises a limiting ring sleeve (31) sleeved on the drill bit matrix (13) and the reaming cone teeth (32) penetrating through the limiting ring sleeve (31) and embedded in the positioning side slot hole (134).

8. The detachable diamond drill bit of claim 7, wherein, The limiting ring sleeve (31) comprises a plug-in reaming slot (311) corresponding to the positioning side slot hole (134) and a penetrating limiting slot (312), the plug-in reaming slot (311) being below the penetrating limiting slot (312) and communicating with the penetrating limiting slot (312).

9. The detachable diamond drill bit of claim 8, wherein, The reaming cone teeth (32) are composed of a coaxially butted plug-in cylinder (321) and a pyramid tooth body (322), and a side opening slot (3211) capable of defining an assembly station in cooperation with the penetrating limiting slot (312) is further formed on the side surface of the plug-in cylinder (321).

Images