Diamond anti-deviation drill bit with regular and odd polygon bottom lip surfaces and drilling machine

Abstract

The invention provides a regular odd polygon bottom lip surface diamond anti-deviation drill bit and a drilling machine. The drill bit comprises a drill bit rigid body of a cylindrical structure; the diamond matrix is fixed on one end face of the drill bit steel body; the diamond matrix comprises a plurality of working matrix blocks and auxiliary matrix blocks which are the same in number, and the working matrix blocks and the auxiliary matrix blocks are arranged in a crossed mode and evenly arranged on one end face of the drill bit steel body at intervals. The bottom lip surfaces of the working tire body blocks and the auxiliary tire body blocks are planes; the adjacent side faces of the working matrix block and the auxiliary matrix block are planes, and the axis of the drill rigid body is located on the planes. A chip groove is formed in a gap between every two adjacent working tire body blocks and auxiliary tire body blocks; the number of the working tire body blocks and the number of the auxiliary tire body blocks are odd. The anti-deviation drill bit has the advantages of being excellent in anti-deviation effect, high in drilling efficiency, long in service life and wide in application range.

Description

Technical Field

[0001] This application belongs to the field of drilling tools used in geological exploration, oil drilling, mining and other fields, and specifically relates to a diamond anti-deviation drill bit with a regular polygonal bottom lip and a drilling rig. Background Technology

[0002] In geological exploration, resource extraction, and other engineering operations, drilling operations require extremely strict straightness of the borehole. Once the borehole deviates, it will not only lead to inaccurate exploration data and affect the judgment of underground resource distribution and stratigraphic structure, but may also increase drilling costs, prolong the construction period, and even cause drilling accidents.

[0003] In the prior art, the following methods are used to prevent borehole deviation: 1. Optimize the drill string structure; by optimizing the mechanical properties of the drill string assembly, reduce the tendency to tilt during drilling, requiring no additional equipment intervention, and suitable for shallow to medium-depth holes and simple formations. For example: Full-range drill bit assembly: Multiple sets of "stabilizers" (such as auger stabilizers and rigid stabilizers) are configured above the drill bit to make multiple points of contact between the drill bit and the borehole wall, limiting the radial swing of the drill bit and maintaining the straightness of the borehole.

[0004] Pendulum drill string assembly: It uses the gravity of the drill collar to form a "pendulum torque" to automatically correct slight tilts during drilling. It has a simple structure and low cost and is often used for conventional drilling of vertical wells.

[0005] Rigid full-eye drill string: It adopts large-diameter, high-rigidity drill collars and stabilizers to enhance the overall rigidity of the drill string, reduce drill string bending caused by formation heterogeneity, and is suitable for drilling in hard formations.

[0006] The above technology has the following drawbacks: Poor adaptability: The anti-slope effect of full-length drilling tools and pendulum drilling tools is limited in complex strata (such as interbedded soft and hard strata, fault-developed strata). When the lateral pressure of the strata is uneven or there are karst caves, it is difficult to resist the tilting trend.

[0007] Deep hole failure: As drilling depth increases, the rigidity of the drill bit decreases, the bending deformation caused by the weight of the drill pipe intensifies, and passive anti-deviation measures cannot correct the cumulative inclination. The risk of deviation exceeding tolerance in deep holes (>1000m) increases significantly.

[0008] Impact on drilling efficiency: Rigid full-gauge drills have high frictional resistance, requiring more power and increasing the difficulty of tripping in and out of the hole, resulting in a decrease in drilling speed; pendulum drills can only correct slight tilts and cannot effectively adjust larger tilts that have already occurred.

[0009] 2. Active guidance control technology: By monitoring the borehole trajectory in real time, it actively adjusts the drilling direction, achieving high anti-deviation accuracy. It is suitable for deep holes and complex formations (such as those containing faults or alternating layers of soft and hard rock). For example: Measurement While Drilling (MWD) + Guided Drilling: The MWD system collects borehole inclination and azimuth data in real time through sensors inside the drill pipe and transmits them to the ground control system. If the inclination is found to be out of tolerance, the drilling direction of the drill bit is adjusted by guiding tools (such as eccentric guides and rotary guides) to correct the deviation in real time.

[0010] Wired surveying while drilling: Surveying data is transmitted through a cable inside the drill pipe. The signal is stable and the measurement accuracy is high. It is suitable for ultra-deep holes (such as kilometer-level boreholes). However, the cable is prone to wear and affects drilling efficiency.

[0011] Directional drilling technology: By pre-setting the drilling trajectory, directional drill bits (such as PDC directional drill bits) and guiding tools are used to force the borehole to extend in a straight line. It is often used for high-precision resource extraction holes (such as oil and gas wells and coalbed methane wells).

[0012] The above technology has the following drawbacks: High cost and complexity: Equipment such as MWD systems and rotary guide tools are expensive (costing hundreds of thousands of yuan per set), and are difficult to maintain and calibrate, making them unaffordable for small and medium-sized projects; moreover, the technology relies on professional operating teams and is not widely adopted.

[0013] Signal transmission and lifespan issues: Wireless MWD signals are easily interfered with in deep holes or metal-bearing strata, resulting in data transmission delays or distortions; wired MWD cables are easily worn or broken by drilling tools, affecting the continuity of construction.

[0014] Limited formation adaptability: Directional drill bits and guide tools wear out severely in extremely hard formations (such as granite and basalt), resulting in a shortened lifespan. Drilling must be paused when adjusting the direction, affecting construction efficiency. In loose formations, guide tools are easily buried by sand and mud, making them unable to work properly.

[0015] 3. Optimization of process parameters: By adjusting drilling operation parameters, drilling deviation caused by human factors and improper processes can be reduced. This is usually used in conjunction with the first two types of techniques.

[0016] Control drilling speed: In hard or complex formations, adopt the "slow drilling speed, steady feed" mode to avoid the drill bit impacting the borehole wall and causing deviation; in soft formations, appropriately increase the drilling speed to reduce the sinking and tilting of the drill string.

[0017] Optimize drilling fluid performance: By adjusting the viscosity and shear force of the drilling fluid, enhance its support for the borehole wall and prevent borehole wall collapse that could lead to drill string deviation; at the same time, utilize the lubricity of the drilling fluid to reduce friction between the drill string and the borehole wall, thereby reducing the probability of inclination.

[0018] Standardized operating procedures: Avoid frequent tripping up and down of the drill string or sudden lifting and lowering of the drill string during drilling. Maintain uniform rotation and feed of the drill string to reduce drill deviation caused by instantaneous impact forces.

[0019] The above technology has the following drawbacks: Relying on experience-based judgment: The optimization of parameters such as drilling speed and drilling fluid performance needs to be based on the experience of on-site engineers. There is a lack of unified quantitative standards, and the difference in the technical level of different operators can lead to unstable anti-deviation effects.

[0020] Unable to cope with emergencies: When sudden faults, karst caves or borehole wall collapses occur in the strata, it is difficult to quickly correct the tilt by simply adjusting the process parameters. This can easily lead to the abandonment of the borehole or the need for secondary correction, increasing construction costs.

[0021] The above three existing technologies also share the following common drawbacks: Measurement accuracy is affected by environmental interference: Complex strata (such as strata with high magnetic permeability or strata containing radioactive minerals) can interfere with the signal of the inclinometer, leading to increased measurement errors in dip and azimuth angles, and affecting the accuracy of anti-incline control.

[0022] Lag in correction: Even with real-time monitoring technology, there is still a slight lag in data transmission, analysis, and guidance adjustment. In steeply dipped formations or rapid drilling scenarios, correction may only be carried out after the dip exceeds the tolerance, affecting the straightness of the borehole.

[0023] Poor cuttings removal: When drilling in complex formations, rock cuttings generated at the bottom of the hole tend to accumulate between the drill bit and the bottom of the hole, forming a "cutting pad" phenomenon. This phenomenon exacerbates the uneven stress on the drill bit, making the drill bit deflection problem even worse. At the same time, the breaking action of the drill bit on the rock at the bottom of the hole is relatively concentrated, which can easily create excessively deep or shallow cutting zones in some areas, further affecting the straightness of the borehole.

[0024] Therefore, developing an anti-deviation drill bit that can actively break the directional deviation trend, achieve dynamic deviation correction, and has a good chip removal effect has become a key requirement to solve the defects of existing technology and improve the quality and efficiency of drilling operations. Summary of the Invention

[0025] The purpose of this application is to overcome the shortcomings of existing diamond drill bits, such as poor anti-skewing effect and insufficient drilling straightness due to the symmetrical structure of the bottom lip.

[0026] To achieve the above objectives, this application proposes a diamond anti-skew drill bit with a regular odd polygonal bottom lip, comprising: A cylindrical drill bit rigid body; A diamond matrix is ​​fixed to one end face of the drill bit body; the diamond matrix comprises: Multiple working body blocks and auxiliary body blocks of the same number are arranged in a cross pattern and at even intervals on one end face of the drill bit body; The bottom lip surfaces of the working body block and the auxiliary body block are planes; the adjacent side surfaces of the working body block and the auxiliary body block are all planes, and the axis of the drill bit body is located on this plane; The gap between every two adjacent working tire blocks and auxiliary tire blocks forms a chip removal groove; The number of working tire blocks and auxiliary tire blocks is odd.

[0027] As an improvement to the aforementioned drill bit, the inner side of the working body block has the same arc surface as the inner side of the drill bit steel body; the outer side of the working body block is an arc surface and protrudes beyond the outer side of the drill bit steel body.

[0028] As an improvement to the aforementioned drill bit, the inner and outer sides of the auxiliary matrix block have the same arc surface as the inner and outer sides of the drill bit steel body.

[0029] As an improvement to the aforementioned drill bit, the height of the working body block is 2-5 mm higher than the height of the auxiliary body block.

[0030] As an improvement to the aforementioned drill bit, the depth of the chip removal groove gradually increases from the outer edge to the inner edge.

[0031] As an improvement to the aforementioned drill bit, the number of the working body block and the auxiliary body block is 5, 7, or 9.

[0032] As an improvement to the aforementioned drill bit, the working matrix block is made of a mixture of diamond particles and a metal binder in a set ratio; the working matrix block is made of a metal binder. The metal binder is composed of copper, iron, and cobalt mixed in a mass ratio of 4:3:3; The diamond particles are selected from diamonds with a particle size of 30-50 mesh.

[0033] As an improvement to the aforementioned drill bit, the assembly method of the working body block and the drill bit body is as follows: the working body block is fixed to one end of the drill bit body, and then placed in a sintering furnace at a temperature of 850-900℃ and a pressure of 15-20MPa for sintering for 40-60 minutes. After sintering, it is cooled to room temperature.

[0034] As an improvement to the aforementioned drill bit, the end of the drill bit body away from the diamond matrix has a threaded joint.

[0035] This application also provides a drilling rig, comprising: The power system provides power to all components of the drilling rig; The tracked walking device, located at the bottom of the drilling rig, is used to support the movement of the drilling rig; The operation control box, located on one side of the drilling rig body, integrates control buttons and instruments for controlling the start, stop and adjustment of drilling parameters of the drilling rig; The drill arm, a long rod structure, is used to support and adjust the position and angle of the drill string to achieve drilling at different depths and directions; and The drilling tool, installed at the front end of the drill arm, includes a drill bit and a drill rod; The drill bit is the aforementioned regular odd polygonal bottom lip diamond anti-deviation drill bit. Compared with existing technologies, the advantages of this application are: 1. Excellent anti-deviation effect: This invention breaks through the defect of traditional symmetrical drill bits that are prone to directional deviation by using a regular odd polygonal bottom lip structure. It achieves automatic deviation correction by using dynamic mechanical balance, effectively controlling the borehole deviation and ensuring the accuracy of exploration data.

[0036] 2. High drilling efficiency: The regular polygonal matrix layout and optimized chip removal structure reduce rock cuttings accumulation at the bottom of the hole and avoid the "chipping" phenomenon. At the same time, the reasonable design of the working matrix blocks improves rock cutting efficiency, resulting in a significant increase in drilling speed compared to traditional drill bits.

[0037] 3. Long service life: The drill bit body is made of high-strength alloy steel, combined with a high-quality diamond matrix and a strong sintering connection method, which improves the overall strength and wear resistance of the drill bit, reduces problems such as matrix block detachment and wear, and extends the service life of the drill bit.

[0038] 4. Wide range of applications: This drill bit can adapt to various harsh drilling scenarios such as deep hard rock and complex strata, solving the problem of poor drilling performance of existing drill bits in complex strata, and has a wide range of applications. Attached Figure Description

[0039] Figure 1 The image shown is a top view of the anti-skew drill bit; Figure 2 The image shown is a longitudinal section of the anti-skew drill bit. Figure 3 The diagram shown is a near-pentagonal bottom lip surface of the anti-skew drill bit; Figure 4 The diagram shown is a schematic of the drilling rig structure. Detailed Implementation

[0040] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0041] Through long-term observation and research on existing technologies and drilling processes, the applicant has discovered that existing diamond drill bits typically employ a symmetrical structure on their bottom lip, such as a circle or a regular hexagon. During drilling, these symmetrical drill bits are highly susceptible to stable directional deviation when encountering external forces such as uneven formation hardness or eccentric drilling pressure. This is because the cutting reaction force of a symmetrical structure is evenly distributed, making it difficult to generate a corrective force to counteract the deviation trend when subjected to external interference, resulting in poor anti-deviation performance.

[0042] Furthermore, in traditional symmetrical drill bit designs, rock cuttings generated at the bottom of the hole accumulate between the drill bit and the hole bottom during drilling in complex formations, creating a "cutting pad" phenomenon. This phenomenon further exacerbates the uneven stress distribution on symmetrical drill bits, worsening the deflection problem. Simultaneously, the consistent cutting angles of the symmetrical structure concentrate the rock-breaking action at the bottom of the hole, easily creating excessively deep or shallow cutting zones in certain areas, further affecting the straightness of the borehole.

[0043] Example 1 Based on this, this application provides a diamond anti-deviation drill bit with a regular polygonal bottom lip surface. Through the regular polygonal bottom lip surface design, combined with the optimized matrix layout and chip removal structure, it achieves active anti-deviation and dynamic correction, while improving the cleanliness of the bottom of the hole, thereby improving drilling stability and efficiency and extending the service life of the drill bit.

[0044] like Figures 1-3 As shown, this application provides a diamond anti-skew drill bit with a regular odd polygonal bottom lip, including a drill bit body 1, a diamond matrix, and a chip removal groove 4. The specific structure and connection relationship of each component are as follows: The drill bit body 1 is a cylindrical structure forged from high-strength alloy steel. Its material possesses excellent compressive and impact resistance, enabling it to withstand the enormous drilling pressure and torque during drilling, ensuring the overall stability of the drill bit structure. One end of the drill bit body is equipped with a threaded connector 5. The specifications of the threaded connector 5 match the drill pipe, ensuring a secure connection between the drill bit and the drill pipe, guaranteeing stable power transmission during drilling. The other end of the drill bit body 1 is sintered and fixedly connected to the working matrix block 2 and auxiliary matrix block 3 within the diamond matrix. This connection method features high connection strength and good sealing, effectively preventing the matrix blocks from detaching or loosening during drilling. Between the working matrix block 2 and the auxiliary matrix block 3, a space is reserved for a cuttings removal groove 4. The cuttings removal groove 4 allows drilling fluid to flow through and carries away rock cuttings generated at the bottom of the hole.

[0045] The diamond matrix is ​​evenly distributed at one end of the drill bit body 1, comprising a total of 10 matrix blocks, of which 5 are working matrix blocks 2 and the other 5 are auxiliary matrix blocks 3. The inner side of the working matrix block 2 has the same arc shape as the inner side of the drill bit body 1, while the outer side has an arc shape protruding beyond the outer side of the drill bit body 1; that is, the diameter of the outer arc surface of the working matrix block 2 is larger than the diameter of the outer side of the drill bit body 1. The inner and outer sides of the auxiliary matrix blocks 3 both have the same arc shape as the inner and outer sides of the drill bit body 1. The bottom lip surfaces of both the working matrix blocks 2 and the auxiliary matrix blocks 3 are flat. The adjacent side surfaces of the working matrix blocks 2 and the auxiliary matrix blocks 3 are also flat, and the axis of the drill bit body 1 lies on this plane.

[0046] The working matrix block 2 is the core component of the drill bit for rock cutting and fracturing, and its interior is uniformly distributed with diamond particles. These diamond particles possess extremely high hardness, enabling them to effectively break up hard rock formations. The auxiliary matrix block 3 primarily serves to support the drill bit, maintain the shape of the bottom lip, and assist in chip removal.

[0047] Each block is equipped with a chip removal groove 4 to ensure smooth chip removal. The working block 2 is 2-5mm higher than the auxiliary block 3. This height difference design allows the working block 2 to preferentially contact the rock at the bottom of the hole for effective cutting. Meanwhile, the auxiliary block 3 provides stable support during the cutting process of the working block 2, preventing damage due to excessive force. Both the inner and outer surfaces of the working block 2 are designed with arc surfaces. This shape reduces rock wear on the block during drilling, lowers drilling fluid flow resistance, and improves chip removal efficiency. The inner and outer surfaces of the auxiliary block 3 are also arc surfaces. Figure 3 As shown, the lines connecting the outer vertices of two adjacent working tire blocks 2 form a regular pentagonal structure. Each working tire block is opposite an auxiliary tire block. This structure is the key to achieving the anti-tilt function.

[0048] Ten cuttings removal channels 4 are provided, located between every two adjacent working blocks 2 and auxiliary blocks 3. The depth of the cuttings removal channels 4 gradually increases from the outer edge to the inner edge of the drill bit, forming an inclined channel structure. This gradual depth design guides the drilling fluid to form a stable flow gradient within the cuttings removal channels 4, improving the drilling fluid's ability to carry cuttings, while preventing the cuttings removal channels 4 from weakening the overall structural strength of the drill bit due to excessive depth. Through efficient cuttings removal channels, the accumulation of cuttings at the bottom of the hole can be reduced, avoiding the "cutting edge" phenomenon, further suppressing drill bit deflection, and ensuring the stability of the drilling process.

[0049] The diamond anti-deviation drill bit with a regular odd polygonal bottom lip provided in this application uses a regular odd polygonal lip structure to actively disrupt the stable tendency of the drill bit to "easily deviate to one side" during drilling. It achieves anti-deviation by utilizing mechanical balance and cutting feedback. The specific principle can be explained in detail through the following three points: 1. Break the symmetrical cutting pattern to avoid directional deviation; Traditional drill bits with circular or even polygonal (such as regular hexagonal or octagonal) lips are prone to developing a stable "skewed cutting direction" when subjected to external forces during drilling, such as increased cutting resistance in some areas due to uneven formation hardness or unbalanced drill pressure. In contrast, the pentagonal bottom lip in this application has an asymmetrical structure, with differences in cutting angle and contact length with the formation on each of the five sides. When the drill bit cuts the rock at the bottom of the hole, the cutting reaction forces generated by each side are dispersed and have no fixed direction, preventing a continuous skew trend and thus fundamentally reducing the possibility of "active skew" of the drill bit.

[0050] 2. Utilize the "fulcrum effect" for automatic adjustment; During drilling, the five vertices and five sides of the pentagonal lip alternately contact the rock at the bottom of the hole. This contact method is equivalent to the drill bit always being supported at the bottom of the hole by multiple "temporary fulcrums." When the drill bit shows signs of deflection, such as a tendency to deflect to the left, the contact pressure between the right lip and the rock at the bottom of the hole increases, and the cutting resistance also increases, thus generating a reverse corrective force to the right. Conversely, when the drill bit tends to deflect to the right, the left lip generates a reverse corrective force. Through this dynamic mechanical balance, the tendency of the drill bit to deflect can be suppressed in real time, achieving automatic adjustment and ensuring the straightness of the borehole.

[0051] 3. Enhance hole bottom cleaning and cutting stability; The pentagonal bottom lip, combined with 10 chip removal grooves 4 extending along the edge of the lip, creates a more dispersed and efficient chip removal channel at the bottom of the hole. When the drilling fluid flows within the chip removal grooves 4, it can fully contact the rock cuttings at the bottom of the hole and quickly carry them out, effectively reducing the accumulation of rock cuttings at the bottom and avoiding uneven drill bit stress caused by the "padded" phenomenon resulting from rock cuttings accumulation. Simultaneously, the pentagonal lip ensures a more uniform cutting action of the drill bit on the rock at the bottom of the hole, avoiding the formation of excessively deep or shallow cutting areas in localized areas due to concentrated cutting action, as is common in traditional symmetrical drill bits. This further improves the stability of the drilling process and ensures the straightness of the borehole.

[0052] The fabrication process of the diamond anti-skew drill bit with a regular odd polygonal bottom lip provided in this application is as follows: 1. Drill bit rigid body preparation; High-strength alloy steel is selected and forged according to the design dimensions to form the initial shape of the drill bit body. Subsequently, threads are machined at one end of the drill bit body to create a threaded joint conforming to the drill pipe connection specifications. The thread machining accuracy must meet relevant national standards to ensure the sealing and firmness of the connection. The area at the other end of the drill bit body used to connect to the matrix block undergoes surface treatment to remove the oxide layer and impurities, preparing for subsequent sintering and joining.

[0053] 2. Preparation of diamond matrix; Preparation of the working matrix block: Diamond particles (30-50 mesh diamond) and a metal binder (a mixture of copper, iron, and cobalt in a mass ratio of 4:3:3) are mixed evenly in a mass ratio of 1:5 to form a matrix mixture. The mixture is filled into a pre-made working matrix block mold and hot-pressed at 900-950℃ and 20-25MPa for 60-90 minutes. After sintering, it is cooled to room temperature, and the working matrix block blank is removed. The blank is then polished to ensure a smooth surface and dimensional accuracy meeting design requirements, while ensuring the working matrix block's height is 2-5mm higher than the auxiliary matrix block, as per design standards.

[0054] Preparation of auxiliary matrix blocks: An auxiliary matrix block mixture is prepared using the same metal binder as the working matrix block (copper, iron, and cobalt in a mass ratio of 4:3:3), without the addition of diamond particles. This mixture is filled into the auxiliary matrix block mold and sintered under the same hot-pressing sintering conditions as the working matrix block (temperature 900-950℃, pressure 20-25MPa, holding time 60-90 minutes). After cooling, the blank is removed. The blank is then polished to ensure dimensional accuracy matches that of the working matrix block.

[0055] 3. Chip conveyor groove machining; In the area where the drill bit's rigid body connects to the matrix block, a chip removal groove is machined using CNC milling according to the designed position and dimensions. The depth of the chip removal groove gradually increases from the outer edge to the inner edge. During machining, it is necessary to ensure that the groove wall is smooth and avoid burrs or protrusions to prevent obstruction of rock cuttings discharge.

[0056] The assembly process of the diamond anti-skew drill bit with a regular polygonal bottom lip provided in this application includes: Five working matrix blocks and five auxiliary matrix blocks, after being prepared, are evenly arranged in the corresponding areas at the bottom of the drill bit body according to the designed positions, ensuring that the gap between the working and auxiliary matrix blocks meets the design requirements of the chip removal groove. Then, the assembled drill bit is placed in a sintering furnace for secondary sintering at a temperature of 850-900℃ and a pressure of 15-20MPa for 40-60 minutes, ensuring a firm connection between the matrix blocks and the drill bit body. After the secondary sintering is completed, the drill bit is cooled to room temperature and removed.

[0057] After assembly, appearance and performance testing are required.

[0058] Visual inspection: Using a combination of visual inspection and caliper measurement, check the overall appearance of the drill bit for defects such as cracks and deformation, and check whether the specifications of the threaded joint, the size of the matrix block, and the depth and shape of the chip removal groove meet the design requirements.

[0059] Performance Testing: Deep hard rock formation samples similar to actual drilling scenarios were selected, and the drill bit was mounted on drilling equipment for simulated drilling tests. During the tests, the borehole deviation, drilling speed, and drill bit wear were monitored in real time. Test results showed that the drill bit controlled the borehole deviation within 0.5° / 100m during drilling, increased the drilling speed by 15%-20% compared to traditional symmetrical diamond drill bits, and exhibited minimal wear on the matrix blocks after 100 hours of continuous drilling, significantly extending its service life.

[0060] In this embodiment, the drill bit lip is a regular pentagon. The pentagonal lip can ensure the drill bit rotational balance, improve guidance stability, and adapt to varying rock properties.

[0061] In other embodiments, other regular odd polygons (such as heptagons, nonagons, etc.) can also serve as anti-deviation drilling tools. However, among the anti-deviation, efficiency, and strength requirements for hard rock drilling, the pentagon is the most widely applicable and adaptable solution. Regarding anti-deviation requirements, the five cutting edges of the pentagon can form a more uniform radial support force, and the "gripping force" on the borehole wall during rotation is moderate. It avoids insufficient stability due to too few sides (such as triangles) and excessive stability due to too many sides (such as heptagons and above), thus preventing difficulties in guide adjustment. The flexibility is reduced; in terms of efficiency requirements, hard rock drilling requires sufficient single-edge cutting force. Each cutting edge of the pentagon can be distributed with a more reasonable load, avoiding the problem of insufficient single-edge force and low cutting efficiency when there are too many edges, and also avoiding the problem of excessive force on a single edge when there are too few edges, which can lead to wear or chipping; in terms of strength requirements, the 10 chip removal grooves of the pentagon are of moderate size, which can quickly remove rock chips generated by hard rock drilling and prevent chip blockage, while ensuring that the drill bit itself has sufficient structural strength. At the same time, the heat dissipation path is more balanced, reducing the shortened life caused by local overheating.

[0062] Example 2 like Figure 4 As shown, this application also provides a drilling rig that performs drilling operations using the drill bit described in Embodiment 1. The drilling includes: The power system 14 is equipped with an engine and other power devices to provide power to various parts of the drilling rig and ensure the normal operation of the drilling rig.

[0063] The tracked walking device 15, located at the bottom of the drilling rig, enables the drilling rig to move flexibly on complex open terrain (such as gravel and soil sites in mines), facilitating the adjustment of the working position.

[0064] The operation control box 12 is located on one side of the drilling rig body and integrates various control buttons, instruments, etc. The operator uses it to control the drilling rig to start, stop, and adjust drilling parameters.

[0065] Drill arm 11 is a long rod structure used to support and adjust the position and angle of the drill bit to achieve drilling at different depths and directions.

[0066] The drill string 13, mounted at the front end of the drill arm 11, is the part used for drilling operations and includes components such as the drill bit and drill rod. The drill rod is used to transmit torque and axial pressure, connects the drill bit to the power system 14, and can be extended according to the drilling depth.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.

Claims

1. A positive odd polygonal base lip face diamond milled bit, characterized by, The drill bit rigid body comprises: a cylindrical drill bit rigid body; and a diamond matrix fixed on one end face of the drill bit rigid body, the diamond matrix comprising: a plurality of working matrix blocks and auxiliary matrix blocks with the same number, cross-arranged and uniformly spaced on one end face of the drill bit rigid body; the bottom lip surface of the working matrix blocks and the auxiliary matrix blocks is a plane; the adjacent side surface of the working matrix blocks and the auxiliary matrix blocks is also a plane, and the axis of the drill bit rigid body is located on the plane; the gap between every two adjacent working matrix blocks and auxiliary matrix blocks forms a chip flute; the number of the working matrix blocks and the auxiliary matrix blocks is odd.

2. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the inner side surface of the working matrix blocks has the same circular arc surface as the inner side surface of the drill bit rigid body; the outer side surface of the working matrix blocks is a circular arc surface and protrudes from the outer side surface of the drill bit rigid body.

3. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the inner and outer side surfaces of the auxiliary matrix blocks have the same circular arc surface as the inner and outer side surfaces of the drill bit rigid body.

4. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the height of the working matrix blocks is 2-5 mm higher than the height of the auxiliary matrix blocks.

5. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the depth of the chip flute gradually increases from the outer edge to the inner edge.

6. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the number of the working matrix blocks and the auxiliary matrix blocks is 5, 7 or 9.

7. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the material of the working matrix blocks is a mixture of diamond particles and metal binder in a set ratio; the material of the working matrix blocks is metal binder; the metal binder is a mixture of copper, iron and cobalt in a mass ratio of 4:3:3; the diamond particles are selected from diamond with a particle size of 30-50 mesh.

8. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the assembly method of the working matrix blocks and the drill bit rigid body is as follows: the working matrix blocks are fixed on one end of the drill bit rigid body, and then put into a sintering furnace with a temperature of 850-900 ℃ and a pressure of 15-20 MPa for sintering for 40-60 minutes, and then cooled to room temperature.

9. The positive odd polygonal base lip face diamond milled bit according to claim 1, wherein, the end of the drill bit rigid body away from the diamond matrix has a threaded joint.

10. A drilling machine comprising: a power system for providing power to various components of the drilling machine; a crawler walking device located at the bottom of the drilling machine for supporting the movement of the drilling machine; an operation control box located on one side of the main body of the drilling machine, integrated with control buttons and instruments, for controlling the start, stop and adjustment of the drilling machine and drilling parameters; a drill arm, a long rod structure, for supporting and adjusting the position and angle of the drilling tool to realize drilling at different depths and directions; and a drilling tool installed at the front end of the drill arm, comprising a drill bit and a drill rod; characterized in that the drill bit is the regular polygonal bottom lip surface diamond anti-inclination drill bit according to any one of claims 1-9.

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