Three-blade wing mining exploration drill bit

Abstract

The application relates to the technical field of geological exploration, and discloses a three-blade mining exploration drill bit, which comprises a drill bit assembly, the drill bit assembly comprises a connecting column, the bottom of the connecting column is fixedly connected with four ball chain assemblies, the bottom of each of the four ball chain assemblies is fixedly connected with an extension assembly, the bottom of the extension assembly is fixedly connected with a driving assembly, the side surface of the connecting column is rotatably sleeved with a sleeve ring, the side surface of the sleeve ring is fixedly connected with a sleeve shell, the sleeve shell is sleeved with an air pipe inside, one end of the air pipe is fixedly connected with a connecting pipe, one end of each of movable rods is fixedly connected with a brake block, the connecting column is offset, the brake block adjusts the rotating speed of the driving assembly under the cooperation of the air pipe and the connecting pipe, and the rotating speed is automatically adjusted according to the offset amount of the connecting column; the ball chain assembly comprises a circular shell, and a spherical chain core is sleeved inside the circular shell, the drilling flexibility is improved, and the problem that the drill bit is damaged due to uneven force on the drill bit in complex strata is avoided.

Description

Technical Field

[0001] This invention relates to the field of geological exploration technology, and more specifically to a three-blade mining exploration drill bit. Background Technology

[0002] Three-blade mining exploration drill bits are key tools used for drilling deep underground geological structures, such as oil and gas reservoirs, geothermal resources, minerals, or scientific drilling. They need to operate under high temperature, high pressure, high wear, and complex geological conditions. Polycrystalline diamond composite (PDC) drill bits are one of the most widely used rock-breaking tools in oil and gas drilling engineering. PDC drill bits are mostly designed with a blade-type structure, with PDC teeth arranged on the crown of the blades on the drill bit body. They have high cutting efficiency and long service life, but are sensitive to hard interlayers or fractured formations. When the formation conditions change or complex formations are encountered, the stress on the drill bit will change, but the direction of the drill bit will not change. Drilling under such conditions is prone to damage to the drill bit. In addition, the rotation speed of the drill bit often does not change when exploring deep layers. When facing different rock layers, the same rotation speed is often used for drilling. When the drill bit encounters hard rock layers, high-speed rotation will reduce the service life of the drill bit. To address these issues, we have proposed a three-blade mining exploration drill bit. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a three-blade mining exploration drill bit to solve the problems existing in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a three-blade mining exploration drill bit, comprising a drill bit assembly, the drill bit assembly comprising a connecting column, four ball chain assemblies fixedly connected to the bottom of the connecting column, telescopic assemblies fixedly connected to the bottom of each of the four ball chain assemblies, a drive assembly fixedly connected to the bottom of each telescopic assembly, a collar rotatably sleeved on the side of the connecting column, a housing fixedly connected to the side of the collar, an air pipe sleeved inside the housing, a connecting pipe fixedly connected to one end of the air pipe, a movable rod slidably sleeved on the inner side of one end of the connecting pipe, and a brake block fixedly connected to one end of each movable rod;

[0005] The offset of the connecting post, with the cooperation of the air pipe and the connecting pipe, causes the brake block to adjust the speed of the drive component, and the speed is automatically adjusted according to the offset of the connecting post.

[0006] The ball chain assembly includes a circular shell, inside which a spherical chain core is fitted. A connecting rod is fixedly connected to the bottom of the spherical chain core. The connecting rod has an active angle of 0-45° and can flexibly shift according to the force under the cooperation of the telescopic component.

[0007] Furthermore, a deflection assembly is rotatably sleeved on the side of the drill bit assembly, and a speed change assembly is fixedly connected to the bottom of the deflection assembly.

[0008] Furthermore, a drive assembly is fixedly connected to the bottom of each of the four telescopic components, and a drill bit body is fixedly connected to the top of the connecting column.

[0009] Furthermore, a semi-circular arc groove is provided on the inner side of the top of the circular shell, and a spherical chain core is placed in the semi-circular arc groove. The radius of the semi-circular arc groove is the same as the radius of the spherical chain core. The height of the internal space of the circular shell is the same as the radius of the spherical chain core. A cross-shaped groove is provided at the bottom of the circular shell, and the connecting rod moves within the cross-shaped groove.

[0010] Furthermore, the telescopic assembly includes a connector, a connecting block is rotatably connected to the bottom inner side of the connector, a telescopic rod is fixedly connected to the bottom of the connecting block, and a connecting rod is fixedly connected to the top of the connector. The telescopic rod is composed of a cylinder and a round rod, and the round rod is slidably sleeved on the inner side of the cylinder.

[0011] Furthermore, the drive assembly includes a turntable, a rotating roller is fixedly connected to the middle of the bottom of the turntable, a connecting pin is fixedly connected to the bottom end of the rotating roller, a metal strip is provided in the middle of the side of the rotating roller, and the metal strip is evenly distributed in the middle of the side of the rotating roller, and four telescopic rods are fixedly connected to the top of the turntable.

[0012] Furthermore, the deflection assembly includes a housing, a conical shell fixedly connected to the top of the housing, a plurality of partition assemblies fixedly connected to the inner side of the conical shell, four square grooves provided at the top of the inner side of the housing, a spring fixedly connected to the top of the inner wall of each of the four square grooves, a side block fixedly connected to one end of each of the four springs, a collar fixedly connected to one side of each of the four side blocks, and the four side blocks are evenly distributed on the side of the collar, a connecting post rotatably sleeved on the inner side of the collar, a short tube fixedly connected to the bottom of the inner wall of each of the four square grooves, a piston rod slidably sleeved on the inner side of one end of each of the four short tubes, and an air pipe fixedly connected to the top of each of the four short tubes, the four air pipes passing through the inner wall of the housing.

[0013] Furthermore, the partition assembly includes a fixing block, a slide rail on one side of the fixing block, a second spring fixedly connected to the bottom of the slide rail, a slider fixedly connected to the top of the second spring, and a baffle fixedly connected to one side of the slider.

[0014] Furthermore, the transmission assembly includes a fixed cylinder, an outer ring assembly is fixedly sleeved on the bottom side of the fixed cylinder, four connecting pipes are fixedly sleeved on the side of the fixed cylinder, and the connecting pipes pass through the side wall of the fixed cylinder, and one end of the four connecting pipes located outside the fixed cylinder is fixedly connected to an air pipe.

[0015] Furthermore, each of the movable rods is fixedly connected to a brake block, which is located on the side of the metal strip of the rotating roller. The side of the fixed cylinder is rotatably fitted with a protective shell, and the two protective shells wrap around one end of the connecting pipe. The bottom of the outer ring assembly is fixedly connected to a tapered threaded connecting post.

[0016] The technical effects and advantages of this invention are as follows:

[0017] When the force on the drill bit changes, the connecting column deflects in the direction of the force, which in turn causes the drill bit body to deflect in the same direction. As the connecting column deflects, the end of the connecting column furthest from the deflection direction lifts upward. Using a ball chain assembly, the lifting of the bottom end of the connecting column pulls the connecting head upward, thus extending the telescopic rod. At this time, the drill bit body and the rotary table remain connected. The rotary table drives the drill bit body to rotate. This process allows the drill bit to deflect and swing according to the force, improving drilling flexibility and avoiding drill bit damage caused by uneven force on the drill bit in complex formations.

[0018] When the connecting column deflects, the collar moves in the direction of deflection, causing the side block to squeeze the piston rod. This forces air from the air pipe into the connecting pipe, increasing the pressure within it. The air pressure then pushes the movable rod, which in turn drives the brake block to squeeze the rotating roller. The roller experiences friction, reducing its rotational speed. The greater the force on the drill bit assembly and the higher the degree of deflection, the greater the movement of the side block squeezing the piston rod, resulting in a greater degree of brake block squeezing the rotating roller. This increases the friction on the roller, leading to a lower drill bit rotational speed. Conversely, the less force on the drill bit assembly and the less deflection, the less the drill bit assembly's rotational speed decreases. This allows the drill bit assembly's rotational speed to be automatically adjusted according to the force applied to the drill bit, preventing high-speed rotation from reducing the drill bit's lifespan when encountering hard rock formations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the drill bit assembly structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the ball chain assembly structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the telescopic component structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the drive component structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the deflection component structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the partition assembly structure of the present invention;

[0027] Figure 9 This is a schematic diagram of the transmission component structure of the present invention;

[0028] Figure 10 This is a schematic diagram of the water inlet location of the drill bit assembly of the present invention.

[0029] The attached figures are labeled as follows: 1. Drill bit assembly; 101. Connecting post; 102. Ball chain assembly; 1021. Circular shell; 1022. Spherical chain core; 1023. Connecting rod; 103. Telescopic assembly; 1031. Connector; 1032. Connecting block; 1033. Telescopic rod; 104. Drive assembly; 1041. Turntable; 1042. Rotary roller; 1043. Connecting pin; 105. Drill bit body; 2. Deflection assembly; 201. Sleeve 202. Shell; 203. Conical shell; 204. Partition assembly; 205. Slider; 206. Collar; 207. Air pipe; 208. Transmission assembly; 301. Fixed cylinder; 302. Outer ring assembly; 303. Connecting pipe; 304. Brake block; 305. Protective shell; 4. Sealing surface; 5. Conical threaded connecting column; 6. Drilling fluid flow channel; 7. Cross-shaped groove; 8. Metal strip; 9. Water eye; 10. Cutting wing. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The three-blade mining exploration drill bit involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figure 1 and Figure 2 The present invention provides a three-blade mining exploration drill bit, including a drill bit assembly 1, wherein a deflection assembly 2 is rotatably sleeved on the side of the drill bit assembly 1, and a speed change assembly 3 is fixedly connected to the bottom of the deflection assembly 2.

[0032] In this embodiment, it is necessary to further explain that the drill bit assembly 1 enables the drill bit to deflect and oscillate according to the force applied, thereby improving drilling flexibility and avoiding the problem of drill bit damage caused by uneven force on the drill bit in complex strata. The deflection assembly 2 and the speed change assembly 3 enable the rotation speed of the drill bit assembly to be automatically adjusted according to the force applied to the drill bit, thereby avoiding the problem that high-speed rotation of the drill bit assembly will reduce the service life of the drill bit when it encounters hard rock strata. The specific structure and working principle of the above-mentioned components will be explained in detail later.

[0033] Reference Figure 3 The drill bit assembly 1 includes a connecting post 101. Four ball chain assemblies 102 are fixedly connected to the bottom of the connecting post 101. Telescopic assemblies 103 are fixedly connected to the bottom of each of the four ball chain assemblies 102. A drive assembly 104 is fixedly connected to the bottom of each of the four telescopic assemblies 103. The drill bit body 105 is fixedly connected to the top of the connecting post 101. A fluid inlet channel is provided inside the connecting post 101. A fluid inlet pipe is fixedly connected to the top of the connecting post 101, and the bottom end of the fluid inlet pipe is fixedly connected to the top of the drive assembly 104.

[0034] In this embodiment, it is necessary to further explain that the top of the drill bit body 105 is provided with three blades 10, and the crown of the blades 10 is provided with PDC teeth. The three blades 10 on the top of the drill bit body 105 are evenly distributed at 120° and adopt a spiral or straight blade design. In this embodiment, a spiral design is adopted, which can be set according to actual needs to balance cutting efficiency and stability. The back slope angle of the cutting surface of the blade 10 is 15-20°. The height of the blade 10 decreases from the crown to the shoulder, forming a stepped cutting structure to improve rock breaking efficiency. The end of the blade 10 is connected to the body at a 45° angle.

[0035] Reference Figure 4 The ball chain assembly 102 includes a circular shell 1021. A semi-circular arc groove is provided on the inner side of the top of the circular shell 1021. A spherical chain core 1022 is placed in the semi-circular arc groove. The radius of the semi-circular arc groove is the same as the radius of the spherical chain core 1022. The height of the internal space of the circular shell 1021 is the same as the radius of the spherical chain core 1022. A cross-shaped slot 7 is provided at the bottom of the circular shell 1021. A connecting rod 1023 is fixedly connected to the bottom of the spherical chain core 1022. The connecting rod 1023 moves within the cross-shaped slot 7, and the angle of movement is between 0-45°. The cross-shaped slot 7 forms a physical limit of 0-45°.

[0036] The spherical chain core 1022 can achieve rolling and rotational dual-degree-of-freedom motion within the semi-circular arc groove, compensating for the angular deviation when the drill bit is unbalanced. The 45° swing range of the connecting rod 1023 is adapted to the axial displacement of the telescopic component 103, avoiding stress concentration caused by rigid connection.

[0037] In this embodiment, it should be specifically noted that the surface of the spherical chain core 1022 is coated with a lubricating material, such as molybdenum disulfide, which has a low coefficient of friction between 0.03 and 0.06 and is resistant to high temperatures of 400°C, or graphite, which is resistant to high temperatures of 600°C. However, it requires water or gas as a lubricating medium and can be designed according to actual needs. The spherical chain core 1022 is located in a semi-circular arc groove, and the bottom of the circular shell 1021 is exactly against the bottom of the spherical chain core 1022, so that it does not produce displacement when rotating in the semi-circular arc groove.

[0038] Reference Figure 5 The telescopic assembly 103 includes a connector 1031, a connecting block 1032 rotatably connected to the bottom inner side of the connector 1031, a telescopic rod 1033 fixedly connected to the bottom of the connecting block 1032, and a connecting rod 1023 fixedly connected to the top of the connector 1031. The telescopic rod 1033 is composed of a cylinder and a round rod, and the round rod is slidably sleeved on the inner side of the cylinder.

[0039] Reference Figure 6 The drive assembly 104 includes a turntable 1041, a rotating roller 1042 fixedly connected to the middle of the bottom of the turntable 1041, a connecting pin 1043 fixedly connected to the bottom end of the rotating roller 1042, a metal strip 8 provided in the middle of the side of the rotating roller 1042, and the metal strip 8 evenly distributed in the middle of the side of the rotating roller 1042, and four telescopic rods 1033 fixedly connected to the top of the turntable 1041. The rotating roller 1042 and the connecting pin 1043 are hollow, and the hollow part is a liquid inlet channel.

[0040] In this embodiment, it should be specifically noted that drilling fluid channels 6 are provided inside the rotating roller 1042, the turntable 1041 and the drill bit body 105 for drilling fluid circulation.

[0041] When the force on the drill bit body 105 changes, the connecting column 101 deflects in the direction of the force, which in turn causes the drill bit body 105 to deflect in the direction of the force. When the connecting column 101 deflects, the end of the connecting column 101 away from the direction of deflection will lift upward. Using the ball chain assembly 102, when the bottom end of the connecting column 101 is lifted, it pulls the connecting head 1031 to lift simultaneously, thereby extending the telescopic rod 1033. At this time, the drill bit body 105 and the rotary table 1041 are still in a connected state. The rotary table 1041 drives the drill bit body 105 to rotate. This process enables the drill bit to deflect and swing according to the force, improving drilling flexibility and avoiding the problem of drill bit damage caused by uneven force on the drill bit in complex formations.

[0042] Reference Figure 7The deflection assembly 2 includes a housing 201, a conical shell 202 fixedly connected to the top of the housing 201, a plurality of partition assemblies 203 fixedly connected to the inner side of the conical shell 202, four square grooves provided at the top of the inner side of the housing 201, a spring 1 fixedly connected to the top of the inner wall of each of the four square grooves, a side block fixedly connected to one end of each of the four springs, a collar 204 fixedly connected to one side of each of the four side blocks, and the four side blocks are evenly distributed on the side of the collar 204, a connecting post 101 rotatably sleeved on the inner side of the collar 204, a short tube fixedly connected to the bottom of the inner wall of each of the four square grooves, a piston rod slidably sleeved on the inner side of one end of each of the four short tubes, and an air pipe 205 fixedly connected to the top of each of the four short tubes, the four air pipes 205 passing through the inner wall of the housing 201.

[0043] In this embodiment, it should be specifically explained that the baffle assembly 203 covers the inner side of the top of the conical shell 202. Both the baffle assembly 203 and the conical shell 202 are used to prevent large particles such as rock cuttings and well wall debris generated during drilling by the drill bit body 105 from entering the deflection assembly 2.

[0044] Reference Figure 8 The partition assembly 203 includes a fixing block 2031, a slide rail is provided on one side of the fixing block 2031, a spring is fixedly connected to the bottom of the slide rail, a slider 2032 is fixedly connected to the top of the spring, and a baffle is fixedly connected to one side of the slider 2032.

[0045] In this embodiment, it is necessary to further explain that, in the original state, the bottom end of the drill bit body 105 is horizontally connected to the connecting post 101, and the bottom edge of the drill bit body 105 is in a state of slight compression of the baffle. When the drill bit body 105 shifts, the bottom of the side of the drill bit body 105 that shifts will further compress the baffle, while the side of the drill bit body 105 opposite to the shift will lift up to release the baffle that was originally compressed. After the baffle is released, it moves up under the action of the second spring to make up for the gap generated after the side of the drill bit body 105 is lifted up, thus preventing rock cuttings from entering.

[0046] Reference Figure 2 and Figure 9The transmission assembly 3 includes a fixed cylinder 301. An outer ring assembly 302 is fixedly sleeved on the bottom side of the fixed cylinder 301. Four connecting pipes 303 are fixedly sleeved on the side of the fixed cylinder 301, and the connecting pipes 303 pass through the side wall of the fixed cylinder 301. One end of the four connecting pipes 303 located outside the fixed cylinder 301 is fixedly connected to an air pipe 205. Movable rods are slidably sleeved on the inner side of the one end of the four connecting pipes 303 located inside the fixed cylinder 301. Brake blocks 304 are fixedly connected to one end of each of the four movable rods. The four brake blocks 304 are located on the side of the metal strip 8 of the rotating roller 1042. Protective shells 305 are rotatably sleeved on the side of the fixed cylinder 301. Two of the protective shells 305 wrap around one end of the connecting pipes 303. A tapered threaded connecting post 5 is fixedly connected to the bottom of the outer ring assembly 302. A horizontal sealing surface 4 is provided at the connection between the outer ring assembly 302 and the tapered threaded connecting post 5 for placing a rubber gasket.

[0047] When the connecting column 101 deflects, the collar 204 moves in the direction of deflection, causing the side block to squeeze the piston rod. This forces the air in the air pipe 205 into the connecting pipe 303, increasing the pressure in the connecting pipe 303. The air pressure pushes the movable rod to move, and the movable rod drives the brake block 304 to squeeze the rotating roller 1042. The rotating roller 1042 experiences friction, resulting in a decrease in rotational speed. The greater the force on the drill bit assembly 1 and the higher the degree of deflection, the greater the movement of the side block squeezing the piston rod, resulting in a greater degree of squeezing of the rotating roller by the brake block 304. The greater the friction received by the rotating roller 1042, the lower the rotational speed of the drill bit body 105. Conversely, the less force on the drill bit body 105 and the less deflection, the less the rotational speed of the drill bit body 105 decreases. This achieves automatic adjustment of the rotational speed of the drill bit body 105 according to the force on the drill bit body 105, avoiding the problem that high-speed rotation of the drill bit body 105 assembly will reduce the service life of the drill bit when it encounters hard rock formations.

[0048] In this embodiment, it should be specifically noted that the brake block 304 is made of steel plate. The brake block 304 brakes the rotating roller 1042 through friction with the metal strip 8. The friction between the brake block 304 and the metal strip 8 causes the drilling fluid temperature to rise, thereby reducing the viscosity and shear force of the drilling fluid, improving fluidity, effectively reducing the structural viscosity formed by clay particles, polymer treatment agents and other components, making the drilling fluid easier to flow and reducing circulation resistance.

[0049] Reference Figure 10 The drill bit body 105 has three water holes 9 between each blade 10 on the top, and the water holes 9 are connected to the drilling fluid flow channel 6.

[0050] The working principle of this invention is as follows: When the force on the drill bit body 105 changes, the connecting column 101 will deflect in the direction of the force, thereby causing the drill bit body 105 to deflect in the direction of the force. When the connecting column 101 deflects, the end of the connecting column 101 away from the direction of deflection will be lifted upward. Using the ball chain assembly 102, when the bottom end of the connecting column 101 is lifted, the connecting head 1031 is pulled up at the same time, thereby extending the telescopic rod 1033. At this time, the drill bit body 105 and the rotary table 1041 are still in a connected state. The rotary table 1041 drives the drill bit body 105 to rotate. This process enables the drill bit to deflect and swing according to the force, improving drilling flexibility and avoiding the problem of drill bit damage caused by uneven force on the drill bit in complex formations.

[0051] When the connecting column 101 deflects, the collar 204 moves in the direction of deflection, causing the side block to squeeze the piston rod. This forces air from the air pipe 205 into the connecting pipe 303, increasing the pressure in the connecting pipe 303. The air pressure pushes the movable rod to move, which in turn drives the brake block 304 to squeeze the rotating roller 1042. The rotating roller 1042 experiences friction, resulting in a decrease in its rotational speed. The greater the force on the drill bit assembly 1 and the higher the degree of deflection, the greater the movement of the side block squeezing the piston rod. This results in a greater degree of pressure from the brake block 304 on the rotating roller, increasing the friction on the rotating roller 1042 and consequently reducing the rotational speed of the drill bit body 105. Conversely, the less force on the drill bit body 105 and the less deflection, the less the rotational speed of the drill bit body 105 decreases. This allows the rotational speed of the drill bit body 105 to be automatically adjusted according to the force on the drill bit body 105, preventing the high-speed rotation of the drill bit body 105 assembly from reducing its service life when encountering hard rock formations.

[0052] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0053] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0054] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-blade wing mining exploration drill bit, comprising a drill bit assembly (1), the drill bit assembly (1) comprising a connecting column (101), the bottom of the connecting column (101) being fixedly connected with four ball chain assemblies (102), the bottom of each of the four ball chain assemblies (102) being fixedly connected with a telescopic assembly (103), the bottom of the telescopic assembly (103) being fixedly connected with a driving assembly (104), characterized in that, The side of the connecting column (101) is rotationally sleeved with a sleeve ring (204), the side of the sleeve ring (204) is fixedly connected with a sleeve shell (201), the inside of the sleeve shell (201) is sleeved with an air pipe (205), one end of the air pipe (205) is fixedly connected with a connecting pipe (303), the inside of one end of the connecting pipe (303) is slidably sleeved with a movable rod, one end of the movable rod is fixedly connected with a brake block (304); The side of the drill bit assembly (1) is rotationally sleeved with a deflection assembly (2), the bottom of the deflection assembly (2) is fixedly connected with a speed change assembly (3); The bottom of the four telescopic assemblies (103) is fixedly connected with a driving assembly (104), the top of the connecting column (101) is fixedly connected with a drill bit main body (105); The deflection assembly (2) comprises a sleeve shell (201), the top of the sleeve shell (201) is fixedly connected with a conical shell (202), the inside of the conical shell (202) is fixedly connected with a plurality of baffle assemblies (203), the top end of the inside of the sleeve shell (201) is provided with four square grooves, the top end of the inner wall of each of the four square grooves is fixedly connected with a spring one, one end of each of the four spring ones is fixedly connected with a side edge block, one side of each of the four side edge blocks is fixedly connected with a sleeve ring (204), the inside of the sleeve ring (204) is rotationally sleeved with a connecting column (101), the bottom end of the inner wall of each of the four square grooves is fixedly connected with a short pipe, the inside of one end of each of the four short pipes is slidably sleeved with a piston rod, the top of each of the four short pipes is fixedly communicated with an air pipe (205), the four air pipes (205) pass through the inner wall of the sleeve shell (201); The speed change assembly (3) comprises a fixed cylinder (301), the side bottom end of the fixed cylinder (301) is fixedly sleeved with an outer ring assembly (302), the side of the fixed cylinder (301) is fixedly sleeved with four connecting pipes (303), and the connecting pipes (303) pass through the side wall of the fixed cylinder (301), one end of each of the four connecting pipes (303) fixedly communicates with an air pipe (205) outside the fixed cylinder (301); The connecting column (101) is offset, under the cooperation of the air pipe (205) and the connecting pipe (303), the brake block (304) adjusts the rotating speed of the driving assembly (104), and the rotating speed is automatically adjusted according to the offset amount of the connecting column (101); The ball chain assembly (102) comprises a circular shell (1021), the inside of the circular shell (1021) is sleeved with a spherical chain core (1022), the bottom of the spherical chain core (1022) is fixedly connected with a connecting rod (1023), the active angle of the connecting rod (1023) is 0-45°, under the cooperation of the telescopic assembly (103), the connecting rod (1023) is flexibly offset according to the stress condition.

2. A three-winged mine exploration drill bit according to claim 1, characterized in that: The inner side of the top of the round shell (1021) is provided with a semicircular arc groove, a spherical chain core (1022) is placed in the semicircular arc groove, the radius of the semicircular arc groove is the same as the radius of the spherical chain core (1022), the height of the internal space of the round shell (1021) is the same as the radius of the spherical chain core (1022), and the bottom of the round shell (1021) is provided with a cross-shaped slot (7).

3. A three-winged mine exploration drill bit according to claim 2, characterized in that: The telescopic assembly (103) comprises a connecting head (1031), a connecting block (1032) is rotatably connected to the inner bottom of the connecting head (1031), a telescopic rod (1033) is fixedly connected to the bottom of the connecting block (1032), the connecting head (1031) is fixedly connected with a connecting rod (1023) at the top, and the telescopic rod (1033) is composed of a cylinder and a round rod.

4. A three-winged mine exploration drill bit according to claim 3, characterized in that: The driving assembly (104) comprises a rotating disc (1041), a rotating roller (1042) is fixedly connected to the middle of the bottom of the rotating disc (1041), a connecting pin (1043) is fixedly connected to the bottom end of the rotating roller (1042), metal strips (8) are arranged on the middle of the side face of the rotating roller (1042), and the metal strips (8) are evenly distributed on the middle of the side face of the rotating roller (1042), and four telescopic rods (1033) are fixedly connected to the top of the rotating disc (1041).

5. A three-winged mine exploration drill bit according to claim 4, characterized in that: The partition plate assembly (203) comprises a fixed block (2031), one side of the fixed block (2031) is provided with a slide, a spring two is fixedly connected to the bottom of the slide, the top end of the spring two is fixedly connected with a sliding block (2032), and the sliding block (2032) is fixedly connected with a baffle on one side.

6. A three-winged mine exploration drill bit according to claim 5, characterized in that: One end of the movable rod is fixedly connected with a brake block (304), the brake block (304) is located on the side face of the metal strip (8) of the rotating roller (1042), a protective shell (305) is rotatably sleeved on the side face of the fixed cylinder (301), two protective shells (305) wrap one end of the connecting pipe (303), and the bottom of the outer ring assembly (302) is fixedly connected with a tapered threaded connecting column (5).

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