Durable reamer bit based on prospecting operation

Abstract

The durable reamer bit comprises a bit body, a diamond composite cone bit body is fixedly installed at the bottom of the bit body, a plurality of first PDC composite spherical teeth are inlaid in the outer side of the diamond composite cone bit body, and a plurality of spiral external expansion racks are fixedly installed on the outer side of the bit body; a liquid conveying groove is formed in the top end of the drill bit body, and a guide-in spiral plate is fixedly installed in the liquid conveying groove. When adjustment is needed, hydraulic oil is pressurized and poured into the filling port by opening the sealing cover, and the one-way valve in the filling port plays a role of an inlet at the moment, so that the hydraulic oil is accumulated in the pressure-resistant ring pipe and enters the hydraulic supporting seat through flow guide of the output pipe and the wear-resistant hydraulic hose, and the hydraulic supporting seat is promoted to extend out; therefore, the expansion angle of the roller bit is changed, the tunneling reaming position of the roller bit is changed, and expansion is conveniently carried out according to needs.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of reaming bits for prospecting operations, in particular to a durable reaming bit based on prospecting operations. BACKGROUND

[0002] Production prospecting refers to various roadway engineering and drilling engineering that are excavated to further prove or determine the shape and quality characteristics of a mineral body and the upgrading of reserves to meet the needs of mining and continued development and extension after the mine is handed over for production on the basis of geological prospecting. A reaming bit for prospecting operations is a drilling tool specially used for enlarging the diameter of a pilot hole in mineral exploration drilling. The core is broken by cutting components such as PDC composite blades and hard alloy ball teeth to obtain a large-diameter drill hole that meets the sampling and logging requirements. It will adapt to different materials (such as PDC, three roller bits, and diamond inlay) according to the prospecting strata (soft rock, hard rock, and fracture zone) and improve the operation stability and durability with the help of a multi-wing structure and a gauge tooth design. It is a key tool for ensuring the compliance of the size of the prospecting drill hole and efficiently advancing the exploration with the help of the drilling detection equipment.

[0003] A reaming bit is usually used in prospecting operations. It is a drilling tool specially used for enlarging the diameter of a pilot hole in mineral exploration drilling, which is convenient for exploring the drilling situation. The amount of debris during reaming is 3-5 times that of the pilot hole. However, the discharge channel of some drill bits is narrow and has an improper angle, which causes rock debris to accumulate around the cutting teeth (blockage). In addition, the uneven distribution of cooling holes causes poor fluidity, making it difficult to fully cooperate with the prospecting operation. Moreover, the drill bit that performs the reaming function cannot be adjusted, and the size requirement of the reaming cannot be adjusted according to actual needs, thereby causing certain inconvenience. Therefore, a durable reaming bit based on prospecting operations is proposed. SUMMARY

[0004] The purpose of the present application is to provide a durable reaming bit based on prospecting operations to solve the problems raised in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a durable reaming drill bit for prospecting operations, comprising a drill bit body, a diamond composite taper drill bit fixedly mounted at the bottom of the drill bit body, a plurality of PDC composite ball teeth inlaid on the outer side of the diamond composite taper drill bit, a plurality of spiral outward reaming racks fixedly mounted on the outer side of the drill bit body, a fluid infusion groove opened inside the top of the drill bit body, an inlet spiral plate fixedly mounted inside the fluid infusion groove, a discharge spiral plate fixedly mounted on the outer side of the top of the drill bit body, an outer slag discharge cylinder fixedly mounted on the outer side of the discharge spiral plate, a plurality of cutting teeth fixedly mounted at the bottom of the outer slag discharge cylinder, a connecting seat fixedly mounted inside the top of the outer slag discharge cylinder, a plurality of mounting support seats fixedly mounted on the outer side of the middle part of the drill bit body, a mounting seat hinged to the outer side of the mounting support seat, and a mounting seat at the bottom end of the mounting seat. A roller cone drill bit is rolled on the inner side of the mounting base. A hydraulic support base is hinged to the inner side of the mounting base. The input end of the hydraulic support base is connected to a wear-resistant hydraulic hose. The top end of the wear-resistant hydraulic hose is connected to an output pipe. The top end of the output pipe is connected to a pressure-resistant ring pipe. The top of the pressure-resistant ring pipe is connected to two filling ports. A one-way valve is installed inside each of the two filling ports. A sealing cap is installed on the top of each of the two filling ports. A conical ring is fixedly installed at the bottom of the mounting support base. A guide groove is opened inside the conical ring. Several discharge ball ports are connected to the outer side of the conical ring. Several discharge holes are connected to the outer side of the bottom end of the infusion tank. A cooling channel is opened inside the drill bit body. Several discharge holes are connected to the outer side of the cooling channel. A discharge hole is connected to the bottom of the cooling channel. An ultrasonic probe assembly is installed inside the diamond composite taper drill bit.

[0006] Preferably, the PDC composite ball teeth are in two sets, with one set being spirally and linearly distributed on the outside of the diamond composite taper bit, and the other set being linearly and uniformly distributed on the outside of the diamond composite taper bit.

[0007] Preferably, a plurality of PDC composite ball teeth are fixedly installed on the outer side of the spiral expanding rack. The PDC composite ball teeth are linearly and uniformly distributed on the outer side of the spiral expanding rack. The spiral expanding rack is circumferentially spirally distributed on the outer side of the drill bit body. The spiral expanding rack is distributed on the outer side of the drill bit body with increasing size from bottom to top.

[0008] Preferably, the top of the drill bit body is provided with a plurality of threaded holes, which are evenly distributed circumferentially on the top of the drill bit body. The interior of the connecting seat is provided with a plurality of bolt holes, which are evenly distributed circumferentially inside the connecting seat. The cutting teeth are evenly distributed circumferentially at the bottom of the outer slag discharge cylinder. The outer slag discharge cylinder and the drill bit body are concentric circles. The spirals of the inlet spiral plate and the outlet spiral plate are arranged in opposite directions.

[0009] Preferably, the mounting support is evenly distributed circumferentially on the outside of the drill bit body, the end of the hydraulic support away from the mounting base is hinged to the outside of the drill bit body, the mounting base and the roller cone drill bit are located at the top of the spiral outward-expanding rack, the pressure-resistant ring tube is fixedly installed on the outside of the drill bit body, the output tube is fixedly inserted through the mounting support and the cone ring and extends to the inside of the pressure-resistant ring tube, the wear-resistant hydraulic hose is provided with a wear-resistant layer on the outside, the pressure-resistant ring tube, the output tube and the wear-resistant hydraulic hose are filled with hydraulic oil, and the one-way valve is installed in opposite directions inside the filling port.

[0010] Preferably, the conical ring is fixedly sleeved on the outside of the drill bit body, the output end of the discharge ball is inclined downward, the discharge hole is circumferentially opened inside the drill bit body, and the two ends of the discharge hole are respectively connected to the inside of the infusion tank and the guide tank.

[0011] Preferably, the top end of the cooling channel is connected to the bottom of the infusion tank cavity, the second discharge hole is circumferentially opened inside the drill bit body, the third discharge hole is circumferentially opened inside the diamond composite taper drill bit, and the ends of the second and third discharge holes away from the cooling channel are respectively connected to the outside of the drill bit body and the diamond composite taper drill bit.

[0012] Preferably, the ultrasonic probe assembly includes a protective unit, which is fixedly installed inside the diamond composite taper drill bit. A plurality of ultrasonic probe arrays are embedded in the sidewall of the protective unit. Sound-insulating structural plates are provided on opposite sides of the ultrasonic probe arrays. The ultrasonic probe arrays and sound-insulating structural plates are evenly distributed circumferentially on the sidewall of the protective unit. A data processing unit is fixedly installed inside the protective unit. A transmission module is fixedly installed inside the protective unit. A power supply assembly is fixedly installed inside the protective unit. The power supply assembly includes a thermal management system power supply and a protective battery. The battery is protected inside the protective unit by a pressure vessel combined with shock absorption and potting structure. A wireless charging unit is fixedly installed inside the protective unit. The wireless charging unit is embedded in an annular slot on the inner wall of the protective unit and fixed with non-magnetic epoxy resin.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. During operation, the device rotates along with the rod, causing the entire structure to rotate. First, the diamond composite cone drill bit is inserted into the borehole and performs initial drilling to reduce the impact of debris from the original borehole. Then, the original borehole is gradually enlarged by using a spiral expanding rack. As the spiral distributes, drilling debris accumulates upwards through the gaps in the spiral expanding rack. Then, the roller cone drill bit drills at the position where the borehole needs to be enlarged. Finally, the borehole is corrected by the cutting teeth, and the debris is discharged through the inner side of the outer slag discharge cylinder. The discharge spiral plate discharges the drilling fluid, and during the drilling process, the fluid delivery tank and the inner side of the guide spiral plate introduce drilling fluid. As the guide spiral plate rotates, it applies a downward rotating force to the fluid. The fluid flows through the guide of the delivery tank and the guide of the cooling channel, allowing the fluid to flow into the discharge holes 2 and 3. During the drilling process, it plays a role in cooling and mixing the slurry. The mixed slurry is then evenly discharged due to the spiral excavation of the spiral expansion rack and the spiral transmission of the discharge spiral plate, reducing accumulation and improving the overall usability of the structure. 2. When adjustment is required, hydraulic oil is injected into the filling port under pressure by opening the sealing cap. The one-way valve inside the filling port acts as an inlet, allowing the hydraulic oil to accumulate inside the pressure-resistant ring pipe and then flow into the hydraulic support seat through the output pipe and wear-resistant hydraulic hose. This causes the hydraulic support seat to extend and the mounting seat to open, thereby changing the expansion angle of the roller cone drill bit. This makes it easier to change the reaming position of the roller cone drill bit and expand as needed, increasing the adjustability during the reaming process. The one-way valve ensures the injection and discharge functions, facilitating temperature and pressure regulation to stabilize the extension and contraction of the hydraulic support seat, and indirectly increasing the effectiveness of the operation in conjunction with drilling and reaming operations. 3. During the reaming operation, it is necessary to explore the reaming location. The ultrasonic probe array group explores the outer side of the diamond composite taper bit and the borehole wall, which facilitates the exploration operation during the reaming process. This makes it easier to understand the internal situation during the reaming drilling and rod extraction process, and facilitates the pre-exploration work for mineral exploration reaming. It also makes it easier to control the reaming operation and indirectly improves the efficiency of use. Attached Figure Description

[0014] Figure 1 This is a front-view stereoscopic structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the three-dimensional appearance structure of the present invention from a rear-view or upward-view perspective.

[0016] Figure 3 This is a schematic diagram of the front appearance structure of the present invention.

[0017] Figure 4 This is a front sectional view of the internal structure of the present invention.

[0018] Figure 5 This is a schematic diagram of the internal structure of the present invention, viewed from the right side.

[0019] Figure 6 This is a top-view cross-sectional schematic diagram of the internal structure of the present invention.

[0020] Figure 7 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0021] Figure 8 For the present invention Figure 4 Enlarged structural diagram at point B.

[0022] Figure 9 This is a schematic diagram of the internal structure of the ultrasonic probe assembly of the present invention.

[0023] In the diagram: 1. Drill bit body; 2. Spiral expanding rack; 3. Diamond composite cone drill bit; 4. PDC composite ball tooth one; 5. PDC composite ball tooth two; 6. External slag discharge cylinder; 7. Cutting teeth; 8. Connecting seat; 9. Infusion tank; 10. Inlet spiral plate; 11. Discharge spiral plate; 12. Threaded hole; 13. Mounting seat; 14. Roller cone drill bit; 15. Cone ring; 16. Bolt hole; 17. Discharge ball port; 18. Pressure-resistant ring tube; 19. Hydraulic support seat; 20. Discharge hole one; 2 1. Mounting support; 22. Output pipe; 23. Wear-resistant hydraulic hose; 24. Filling port; 25. Sealing cap; 26. Flow guide groove; 27. One-way valve; 28. Ultrasonic probe assembly; 2801. Protection unit; 2802. Ultrasonic probe array group; 2803. Sound insulation structure plate; 2804. Power supply assembly; 2805. Data processing unit; 2806. Transmission module; 2807. Wireless charging unit; 29. ​​Cooling channel; 30. Drain hole two; 31. Drain hole three. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-9This invention provides a technical solution: a durable reaming drill bit for mineral exploration operations, comprising a drill body 1, a diamond composite taper drill bit 3 fixedly mounted at the bottom of the drill body 1, a plurality of PDC composite ball teeth 4 inlaid on the outer side of the diamond composite taper drill bit 3, a plurality of spiral outward expanding racks 2 fixedly mounted on the outer side of the drill body 1, a fluid infusion groove 9 opened inside the top of the drill body 1, an inlet spiral plate 10 fixedly mounted inside the fluid infusion groove 9, a discharge spiral plate 11 fixedly mounted on the outer side of the top of the drill body 1, an outer slag discharge cylinder 6 fixedly mounted on the outer side of the discharge spiral plate 11, a plurality of cutting teeth 7 fixedly mounted at the bottom of the outer slag discharge cylinder 6, a connecting seat 8 fixedly mounted inside the top of the outer slag discharge cylinder 6, a plurality of mounting support seats 21 fixedly mounted on the outer side of the middle part of the drill body 1, a mounting seat 13 hinged to the outer side of the mounting support seat 21, and a roller cone drill bit 14 rollingly mounted on the inner side of the bottom end of the mounting seat 13. A hydraulic support seat 19 is hinged to the inner side of the mounting base 13. The input end of the hydraulic support seat 19 is connected to a wear-resistant hydraulic hose 23. The top end of the wear-resistant hydraulic hose 23 is connected to an output pipe 22. The top end of the output pipe 22 is connected to a pressure-resistant ring pipe 18. The top of the pressure-resistant ring pipe 18 is connected to two filling ports 24. A one-way valve 27 is installed inside each of the two filling ports 24. A sealing cap 25 is installed on the top of each of the two filling ports 24. A conical ring 15 is fixedly installed at the bottom of the mounting support 21. A guide groove 26 is opened inside the conical ring 15. Several discharge ball ports 17 are connected to the outer side of the conical ring 15. Several discharge holes 1 20 are connected to the outer side of the bottom end of the infusion tank 9. A cooling channel 29 is opened inside the drill bit body 1. Several discharge holes 2 30 are connected to the outer side of the cooling channel 29. A discharge hole 31 is connected to the bottom of the cooling channel 29. An ultrasonic probe assembly 28 is installed inside the diamond composite taper drill bit 3.

[0026] The working principle of the above technical solution is as follows: During operation, the operator installs the equipment on the drill rod through the threaded hole 12 and the connecting seat 8, and the entire unit rotates with the rotation of the rod. First, the diamond composite cone drill bit 3 is inserted into the borehole to perform initial drilling and reduce the impact of debris from the original borehole. Then, the original borehole is gradually enlarged by the spiral expanding rack 2. As the spiral distributes, the drilling debris accumulates upwards through the gaps of the spiral expanding rack 2. Then, the roller cone drill bit 14 drills at the position where the borehole needs to be enlarged. Finally, the cutting teeth 7 correct the borehole and increase the wear resistance of the bottom of the outer slag discharge cylinder 6. The slag is then spirally discharged through the discharge spiral plate 11 on the inner side of the outer slag discharge cylinder 6. During the drilling process, the infusion tank 9... Drilling fluid is introduced into the inner side of the inlet spiral plate 10. As the inlet spiral plate 10 rotates, it applies a downward rotating force to the fluid. The fluid flows through the guide of the fluid delivery tank 9 and through the guide of the discharge hole 1 20 and the cooling channel 29 into the guide channel 26 and the discharge hole 2 30 respectively. The guide channel 26 guides the fluid into the discharge ball port 17. With the guidance of the discharge ball port 17, the fluid mixes with the drill cuttings. The guide of the cooling channel 29 causes the fluid to flow into the discharge hole 2 30 and the discharge hole 3 31. During the drilling process, the fluid is cooled and mixed. The mixed fluid is evenly discharged by the spiral excavation of the spiral outward expansion rack 2 and the spiral transmission of the discharge spiral plate 11, reducing accumulation and improving the overall performance of the structure.

[0027] In another implementation scheme, such as Figures 1-8 As shown, the PDC composite ball teeth 4 are in two groups, with one group being spirally and linearly distributed on the outside of the diamond composite taper bit 3, and the other group being linearly and uniformly distributed on the outside of the diamond composite taper bit 3.

[0028] The spiral of the PDC composite ball tooth 4 facilitates the process of removing drill cuttings from the original drill hole during drilling with the diamond composite taper drill bit 3, and can also meet the needs of initial hole enlargement. The distributed gaps provide detection and installation positions for the internal ultrasonic structure, making it convenient to work with the structure.

[0029] In another implementation scheme, such as Figures 1-8 As shown, several PDC composite ball teeth 25 are fixedly installed on the outer side of the spiral expanding rack 2. The PDC composite ball teeth 25 are linearly and evenly distributed on the outer side of the spiral expanding rack 2. The spiral expanding rack 2 is distributed in a circumferential spiral on the outer side of the drill bit body 1. The spiral expanding rack 2 is distributed on the outer side of the drill bit body 1 with its size increasing from bottom to top.

[0030] The spiral distribution and upward increasing dimensions of the spiral expanding rack 2 facilitate the gradual enlargement of the original borehole through the spiral expanding rack 2. As the spiral distribution progresses, drilling debris accumulates upward through the gaps in the spiral expanding rack 2, which is convenient for use in hole enlargement operations, increases the design's usability, and facilitates coordinated operations.

[0031] In another implementation scheme, such as Figures 1-8 As shown, the top of the drill bit body 1 is provided with several threaded holes 12, which are evenly distributed in a circle on the top of the drill bit body 1. The inside of the connecting seat 8 is provided with several bolt holes 16, which are evenly distributed in a circle on the inside of the connecting seat 8. The cutting teeth 7 are evenly distributed in a circle on the bottom of the outer slag discharge cylinder 6. The outer slag discharge cylinder 6 and the drill bit body 1 are concentric circles. The spirals of the guide spiral plate 10 and the discharge spiral plate 11 are arranged opposite to each other.

[0032] The threaded hole 12 and the connecting seat 8 facilitate the installation and connection of the drill rod, making it easy to coordinate with the operation. The function of the guide spiral plate 10 is to apply a downward transmission force to the liquid when the drilling fluid is introduced into the fluid delivery tank 9, which indirectly increases the flow effect and assists in water flow guidance. The function of the discharge spiral plate 11 is to apply an upward transmission force to the slurry and debris as it rotates, which facilitates the uniformity of the liquid flow and discharge, and facilitates the guidance and discharge of the liquid, indirectly increasing the use effect and facilitating the auxiliary slurry discharge.

[0033] In another implementation scheme, such as Figures 1-8 As shown, the mounting support 21 is evenly distributed circumferentially on the outside of the drill bit body 1. The hydraulic support 19 is hinged to the outside of the drill bit body 1 at one end away from the mounting base 13. The mounting base 13 and the roller cone drill bit 14 are located at the top of the spiral outward-expanding rack 2. The pressure-resistant ring tube 18 is fixedly installed on the outside of the drill bit body 1. The output tube 22 is fixedly inserted through the mounting support 21 and the cone ring 15 and extends to the inside of the pressure-resistant ring tube 18. The wear-resistant hydraulic hose 23 is provided with a wear-resistant layer on the outside. The pressure-resistant ring tube 18, the output tube 22 and the wear-resistant hydraulic hose 23 are filled with hydraulic oil. The one-way valve 27 is installed in opposite directions inside the filling port 24.

[0034] The mounting support 21 serves to install and increase the structural force in conjunction with the mechanism. It is used in conjunction with the mounting base 13 and the roller cone drill bit 14, increasing the structural stress. When adjustment is needed, hydraulic oil is pressurized and injected into the filling port 24 by opening the sealing cap 25. The one-way valve 27 inside the filling port 24 acts as an inlet, allowing hydraulic oil to accumulate inside the pressure-resistant ring pipe 18 and then flow into the hydraulic support 19 through the output pipe 22 and the wear-resistant hydraulic hose 23, causing the hydraulic support 19 to extend. This allows the mounting base 13 to open, thereby changing the expansion angle of the roller cone drill bit 14. This makes it easier to change the position of the roller cone drill bit 14 during drilling and reaming, expanding as needed. This increases the adjustability during the reaming process. When shrinking is required, the sealing cap 25 of the other filling port 24 can be removed. At this time, the one-way valve 27 inside acts as an outlet, ensuring the filling and discharge functions. This facilitates temperature and pressure regulation, stabilizes the extension and retraction of the hydraulic support base 19, and indirectly increases the effectiveness of the operation in conjunction with drilling and reaming.

[0035] In another implementation scheme, such as Figures 1-8 As shown, the cone ring 15 is fixedly sleeved on the outside of the drill bit body 1, the output end of the discharge ball port 17 is inclined downward, and the discharge hole 20 is circumferentially opened inside the drill bit body 1. The two ends of the discharge hole 20 are respectively connected to the inside of the infusion tank 9 and the guide tank 26.

[0036] The shape of the cone ring 15 ensures structural stability, facilitates the installation of the support base 21 and the pressure-resistant ring tube 18, increases structural stability, and provides a channel for the internal drilling fluid flow. This allows the fluid to flow steadily through the discharge ball port 17. The discharge hole 20 connects the fluid delivery tank 9 and the flow guide tank 26, facilitating the circumferential flow of the drilling fluid as it rotates. This makes it easier to use and indirectly increases the effectiveness of the application.

[0037] In another implementation scheme, such as Figures 1-8 As shown, the top of the cooling channel 29 is connected to the bottom of the inner cavity of the infusion tank 9. The second discharge hole 30 is circumferentially opened inside the drill body 1, and the third discharge hole 31 is circumferentially opened inside the diamond composite taper drill bit 3. The ends of the second discharge hole 30 and the third discharge hole 31 away from the cooling channel 29 are respectively connected to the outside of the drill body 1 and the diamond composite taper drill bit 3.

[0038] Cooling channel 29 guides the liquid inside the liquid tank 9 out and discharges it to the hole enlargement position through discharge hole 2 30 and discharge hole 31. This indirectly helps to keep the coolant stable, and the hole enlargement operation has a low drilling intensity, which can meet the needs of drainage and cooling, and facilitates the hole enlargement operation, thus indirectly increasing the demand for use.

[0039] In another implementation scheme, such as Figure 4 ,Figure 5 and Figure 9 As shown, the ultrasonic probe assembly 28 includes a protective unit 2801, which is fixedly installed inside the diamond composite taper drill bit 3. Several ultrasonic probe array groups 2802 are embedded and enclosed in the sidewall of the protective unit 2801. Sound-insulating structural plates 2803 are arranged on opposite sides of the ultrasonic probe array groups 2802. The ultrasonic probe array groups 2802 and the sound-insulating structural plates 2803 are evenly distributed circumferentially on the sidewall of the protective unit 2801. A data processing unit 2805 is fixedly installed inside the protective unit 2801. The transmission module 2806 is fixedly installed inside the protective unit 2801. The power assembly 2804 is fixedly installed inside the protective unit 2801. The power assembly 2804 includes a thermal management system power supply and a protective battery. The battery is protected and installed inside the protective unit 2801 by a pressure vessel combined with a shock absorption and potting structure. The wireless charging unit 2807 is fixedly installed inside the protective unit 2801. The wireless charging unit 2807 is embedded in an annular slot on the inner wall of the protective unit 2801 and is fixed with non-magnetic epoxy resin.

[0040] During the reaming operation, it is necessary to explore the reaming location. At this time, the ultrasonic probe array group 2802 of the ultrasonic probe assembly 28 explores the outer side of the diamond composite taper drill bit 3 and the borehole wall. The data is processed by the data processing unit 2805 and transmitted to the data receiving end through the transmission module 2806. The power supply assembly 2804 provides power to the ultrasonic probe array group 2802, the data processing unit 2805 and the transmission module 2806, and facilitates the exploration operation during the reaming process. This makes it easier to understand the internal situation during the reaming drilling and rod extraction process, and facilitates the pre-exploration exploration operation for mineral exploration reaming. After the operation is completed, the whole assembly is disassembled and the power supply assembly 2804 is charged through the wireless charging unit 2807, which facilitates the stable use of the drill bit in the drilling operation, increases the exploration function, and the exploration effect is not limited to ultrasonic mode. It is easy to change the exploration principle according to the drilling needs of mineral exploration, facilitates the operation, and makes it easier to control the reaming operation, indirectly improving the efficiency of use. The battery pack is located in the central axis area of ​​the protection unit 2801 via a pressure vessel. The battery pack is flexibly connected to the protection wall via shock-absorbing springs, shock absorbers, or elastic supports to avoid resonance damage caused by drilling vibration. High-strength flexible connections are used between the batteries to allow for minor displacement to disperse impact. The entire battery assembly is encapsulated in the pressure vessel using special thermally conductive epoxy resin or silicone, which not only fixes the battery units to prevent displacement but also dissipates heat for thermal management, while providing electrical insulation and waterproof protection. The battery pack is encapsulated in a sealed cylinder made of high-strength stainless steel or titanium alloy, with both ends sealed by threaded caps. The internal PEEK retaining rings and O-rings form multiple seals, which can withstand high pressures of over 200MPa and high temperatures of over 200℃ in the drilling environment. The probe's acoustic waves are mainly directed at the well wall at an angle of 30-60° rather than axially forward to avoid direct interaction with the PDC. At the same time, the "V" design of the PDC cutting teeth also reduces the reflection of lateral acoustic waves.The power supply assembly 2804 also integrates a battery management system, which monitors the battery status in real time through a temperature sensor. It automatically cuts off the circuit in case of abnormal temperature, overvoltage, or overcurrent, ensuring safety and extending battery life. The ultrasonic probe array 2802 is located in the gap area of ​​the PDC composite ball tooth 4, evenly distributed along the circumference of the diamond composite taper bit 3, and positioned directly behind the PDC tooth gap, ensuring that the sound wave propagation path does not directly face the PDC. The probe window (sound transmission area) is offset from the PDC cutting edge by ≥15° in the circumferential direction, forming a "sound shadow area." Furthermore, the ultrasonic probe array 2802 employs a three-layer protection system: the inner layer (sound window) uses wave-transmitting materials such as sapphire and silicon carbide with acoustic impedance close to diamond to reduce interface reflection; the middle layer (isolation) is filled with sound-absorbing damping materials (such as special silicone) to isolate vibration and absorb stray sound waves; and the outer layer (protective shell) is made of high-strength stainless steel / titanium alloy with a compressive strength ≥250MPa to prevent mechanical impact and uses phased array technology to transmit sound waves through the gap area. By combining shape synthesis and signal enhancement, the ultrasonic probe suppresses PDC reflection interference. The emitted acoustic wave frequency (typically 0.5-5MHz) and the characteristic size of PDC (diamond grain <50μm) form a non-resonant relationship, reducing scattering. The software algorithm automatically identifies and removes PDC reflection signals, focusing on analyzing formation echoes. Through spatial isolation, acoustic optimization, and signal processing, the mutual interference problem has been successfully solved. The two have a clear division of labor: the PDC is responsible for efficient rock breaking, and the ultrasonic probe focuses on measuring formation characteristics. Together, they constitute the "eyes" and "teeth" of the "smart drill bit," significantly improving the efficiency of borehole enlargement exploration. When the diamond composite cone drill bit 3 is used for drilling and enlargement operations, the optimal low-speed safe rotation speed is 50-100RPM. Within this range, it can be ensured that the ultrasonic probe assembly 28, battery, and wireless charging system are not damaged, while maintaining reasonable drilling efficiency. If the drill bit diameter is greater than 8 inches, it is recommended to reduce the upper limit of the safe rotation speed to 80RPM and closely monitor the working status of the components.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A durable reaming drill bit for prospecting operations, comprising a drill bit body (1), characterized in that: A diamond composite taper drill bit (3) is fixedly installed at the bottom of the drill bit body (1). Several PDC composite ball teeth (4) are inlaid on the outer side of the diamond composite taper drill bit (3). Several spiral outward-expanding racks (2) are fixedly installed on the outer side of the drill bit body (1). An infusion groove (9) is opened inside the top of the drill bit body (1). An inlet spiral plate (10) is fixedly installed inside the infusion groove (9). A discharge spiral plate (11) is fixedly installed on the outer side of the top of the drill bit body (1). An external slag discharge cylinder (6) is fixedly installed on the outside. Several cutting teeth (7) are fixedly installed at the bottom of the external slag discharge cylinder (6). A connecting seat (8) is fixedly installed inside the top of the external slag discharge cylinder (6). Several mounting support seats (21) are fixedly installed on the outer side of the middle part of the drill bit body (1). A mounting seat (13) is hinged to the outer side of the mounting support seat (21). A roller cone drill bit (14) is rolled on the inner side of the bottom end of the mounting seat (13). A hydraulic support seat (19) is hinged to the inner side of the mounting seat (13). The input end of the hydraulic support base (19) is connected to a wear-resistant hydraulic hose (23), the top end of the wear-resistant hydraulic hose (23) is connected to an output pipe (22), the top end of the output pipe (22) is connected to a pressure-resistant ring pipe (18), the top end of the pressure-resistant ring pipe (18) is connected to two filling ports (24), each of the two filling ports (24) is equipped with a check valve (27), the top of each of the two filling ports (24) is sealed with a sealing cap (25), and a cone ring is fixedly installed at the bottom of the mounting support base (21). 15), the conical ring (15) has a flow guide groove (26) inside, the outer side of the conical ring (15) is connected to several discharge ball ports (17), the outer side of the bottom end of the infusion tank (9) is connected to several discharge holes one (20), the drill bit body (1) has a cooling channel (29) inside, the outer side of the cooling channel (29) is connected to several discharge holes two (30), the bottom of the cooling channel (29) is connected to discharge holes three (31), and the diamond composite conical drill bit (3) is equipped with an ultrasonic probe assembly (28).

2. A durable reaming drill bit for prospecting operations according to claim 1, characterized in that: The PDC composite ball teeth (4) are in two groups, one group is spirally distributed on the outside of the diamond composite taper bit (3), and the other group is linearly and uniformly distributed on the outside of the diamond composite taper bit (3).

3. A durable reaming drill bit for prospecting operations according to claim 1, characterized in that: Several PDC composite ball teeth (5) are fixedly installed on the outer side of the spiral expanding rack (2). The PDC composite ball teeth (5) are linearly and uniformly distributed on the outer side of the spiral expanding rack (2). The spiral expanding rack (2) is circumferentially spirally distributed on the outer side of the drill bit body (1). The spiral expanding rack (2) is distributed on the outer side of the drill bit body (1) with its size increasing from bottom to top.

4. A durable reaming drill bit for prospecting operations according to claim 1, characterized in that: The top of the drill bit body (1) is provided with several threaded holes (12), which are evenly distributed in a circle on the top of the drill bit body (1). The inside of the connecting seat (8) is provided with several bolt holes (16), which are evenly distributed in a circle on the inside of the connecting seat (8). The cutting teeth (7) are evenly distributed in a circle on the bottom of the outer slag discharge cylinder (6). The outer slag discharge cylinder (6) and the drill bit body (1) are concentric circles. The spirals of the inlet spiral plate (10) and the outlet spiral plate (11) are arranged opposite to each other.

5. A durable reaming drill bit for prospecting operations according to claim 1, characterized in that: The mounting support (21) is evenly distributed around the outside of the drill body (1). The hydraulic support (19) is hinged to the outside of the drill body (1) at one end away from the mounting base (13). The mounting base (13) and the roller cone drill bit (14) are located at the top of the spiral outward-expanding rack (2). The pressure-resistant ring tube (18) is fixedly installed on the outside of the drill body (1). The output tube (22) is fixedly inserted through the mounting support (21) and the cone ring (15) and extends to the inside of the pressure-resistant ring tube (18). The wear-resistant hydraulic hose (23) is provided with a wear-resistant layer on the outside. The pressure-resistant ring tube (18), the output tube (22) and the wear-resistant hydraulic hose (23) are provided with hydraulic oil. The one-way valve (27) is installed in opposite directions inside the filling port (24).

6. A durable reaming drill bit for prospecting operations according to claim 1, characterized in that: The cone ring (15) is fixedly sleeved on the outside of the drill bit body (1). The output end of the discharge ball (17) is inclined downward. The discharge hole one (20) is circumferentially opened inside the drill bit body (1). The two ends of the discharge hole one (20) are respectively connected to the inside of the infusion tank (9) and the guide tank (26).

7. A durable reaming drill bit for prospecting operations according to claim 1, characterized in that: The top of the cooling channel (29) is connected to the bottom of the inner cavity of the infusion tank (9). The second discharge hole (30) is circumferentially opened inside the drill body (1). The third discharge hole (31) is circumferentially opened inside the diamond composite taper drill bit (3). The ends of the second discharge hole (30) and the third discharge hole (31) away from the cooling channel (29) are respectively connected to the outside of the drill body (1) and the diamond composite taper drill bit (3).

8. A durable reaming drill bit for prospecting operations according to claim 1, characterized in that: The ultrasonic probe assembly (28) includes a protective unit (2801), which is fixedly installed inside the diamond composite taper bit (3). Several ultrasonic probe array groups (2802) are embedded in the sidewall of the protective unit (2801). Sound insulation structural plates (2803) are provided on opposite sides of the ultrasonic probe array groups (2802). The ultrasonic probe array groups (2802) and the sound insulation structural plates (2803) are evenly distributed circumferentially on the sidewall of the protective unit (2801). A data processing unit (2805) is fixedly installed inside the protective unit (2801). A transmission module (2806) is fixedly installed inside the protective unit (2801). A power supply assembly (2804) is fixedly installed inside the protective unit (2801). The power supply assembly (2804) includes a thermal management system power supply and a protective battery. The battery is installed inside the protective unit (2801) with protection through a pressure vessel combined with shock absorption and potting structure. A wireless charging unit (2807) is fixedly installed inside the protective unit (2801). The wireless charging unit (2807) is embedded in an annular slot on the inner wall of the protective unit (2801) and fixed with non-magnetic epoxy resin.

Images