Directional drill bit convenient to replace quickly

Abstract

The invention discloses a directional drill bit convenient to quickly replace, which effectively facilitates the disassembly and assembly of the drill bit, and comprises a crushing part and a connecting part, the crushing part is detachably connected to the front side of the connecting part, and the rear side of the connecting part is fixedly connected with an end for connecting a drill rod. A rotatable operating ring is arranged in the middle of the connecting part, a plurality of limiting frames capable of moving front and back along with rotation of the operating ring are arranged on the front side of the operating ring, a disassembling mechanism is arranged on the front sides of the limiting frames, a plurality of fixing blocks are fixedly connected to the front side of the connecting part, and fixing grooves corresponding to the fixing blocks one to one are formed in the rear side of the crushing part. The device is novel in structure, ingenious in conception and easy and convenient to operate, the stability of the device in the running process is effectively improved, the better locking effect is achieved, operation of workers is facilitated, the better connecting effect is achieved, and the resistance of the device in the running process is reduced.

Description

Technical Field

[0001] This invention belongs to the field of horizontal directional drilling technology and relates to a directional drilling bit that is easy to change quickly. Background Technology

[0002] Horizontal directional drilling rigs are construction machines used to lay various underground utilities (pipelines, cables, etc.) without excavating the ground surface. They are widely used in the construction of flexible pipelines for water supply, electricity, telecommunications, natural gas, coal gas, and oil. They are suitable for sandy soil, clay, and other soil conditions.

[0003] During directional drilling operations, drill bits need to be replaced as needed, which is quite inconvenient. Existing directional drill bits are directly connected to the drill rod via threaded connections. When disassembling, this threaded locking structure is prone to locking up and is also inconvenient for workers to operate. Therefore, a directional drill bit that can be easily and quickly replaced is needed to solve the above problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a directional drilling bit that is easy to change quickly, effectively solving the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A directional drilling bit that is easy to change quickly includes a breaking section and a connecting section. The breaking section is detachably connected to the front side of the connecting section. An end for connecting a drill rod is fixedly connected to the rear side of the connecting section. A rotatable operating ring is provided in the middle of the connecting section. Multiple limiting frames that can move back and forth with the rotation of the operating ring are provided on the front side of the operating ring. A disassembly mechanism is connected to the front side of each limiting frame. The front side of each disassembly mechanism is connected to the rear end of the breaking section. Multiple fixing blocks are fixedly connected to the front side of the connecting section. A fixing groove corresponding to each fixing block is opened on the rear side of the breaking section.

[0007] Preferably, the disassembly mechanism includes a first connecting block, a second connecting block, and a third connecting block. A support block is fixedly connected to the outer side of the connecting part corresponding to the position of each first connecting block. Each first connecting block is rotatably connected to the corresponding support block. The second connecting block is rotatably connected to the end of the first connecting block away from the support block. The third connecting block is rotatably connected to the end of the second connecting block away from the first connecting block.

[0008] Preferably, the first connecting block has limit grooves on both the left and right sides, and each limit frame has two limit rods fixedly connected to its front side, with the front side of each limit rod slidably connected to the corresponding limit groove.

[0009] Preferably, the outer side of the connecting part is provided with a plurality of first connecting grooves, and the rear side of the breaking part is provided with a second connecting groove corresponding to the position of each third connecting block, and the front end of each first connecting groove is connected to the rear end of the corresponding second connecting groove.

[0010] Preferably, the first connecting groove includes an inclined portion and a first horizontal portion, the first horizontal portion is connected to the front side of the inclined portion, and the rear end of the third connecting block is provided with a first inclined surface adapted to the inclined portion.

[0011] Preferably, an anti-detachment block is fixedly connected inside the second connecting groove, and an anti-detachment groove adapted to the anti-detachment block is provided on the side of the third connecting block near the anti-detachment block. A second inclined surface is provided on the side of the third connecting block away from the second connecting block, and a second chamfer adapted to the second inclined surface is provided inside the second connecting groove.

[0012] Preferably, both the first connecting block and the second connecting block are fixedly connected with multiple connecting protrusions, and the first connecting block and the second connecting block are rotatably connected through the corresponding connecting protrusions. The third connecting block has a rotating groove at one end near the second connecting block, and the second connecting block is rotatably connected to the third connecting block through the rotating groove.

[0013] Preferably, the operating ring is provided with limiting rings fixedly connected to the connecting part on both the front and rear sides, and the front and rear ends of the operating ring are rotatably connected to the corresponding limiting rings. A sliding sleeve is slidably fitted on the outer side of the rear part of each limiting frame, and each sliding sleeve is fixedly connected to the corresponding limiting ring.

[0014] Preferably, the operating ring has a moving groove inside that corresponds to the limiting frame, and each moving groove has multiple guide grooves inside. Multiple guide blocks are fixedly connected to the upper and lower sides of the rear of the limiting frame, and each guide block is slidably connected to the corresponding guide groove.

[0015] Preferably, the outer side of the operating ring has multiple operating holes, the outer side of the operating ring is fixedly connected with multiple operating protrusions, the outer side of the connecting part is provided with threads, and the rear side of the connecting part is provided with a sealing ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention has a fixing block and a fixing groove. When the connecting part and the crushing part are in a cooperating state, the fixing block and the fixing groove cooperate to apply rotational torque and pushing force to the crushing part through their contact surfaces, thereby obtaining better strength.

[0018] 2. The present invention has a disassembly mechanism, which can tightly connect the connecting part and the crushing part, making it convenient for workers to operate. 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 exploded structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the connecting part in this invention.

[0022] Figure 4 This is a schematic diagram of the exploded structure of the connecting part and the fragmentation part in this invention.

[0023] Figure 5 This is a schematic diagram of the disassembly mechanism in this invention.

[0024] Figure 6 This is a schematic diagram of the guide groove in this invention.

[0025] In the diagram: 1. Crushing section; 2. Connecting section; 3. Operating ring; 4. Limiting frame; 5. Disassembly mechanism; 6. Fixing block; 7. Fixing groove; 8. First connecting block; 9. Second connecting block; 10. Third connecting block; 11. Support block; 12. Limiting groove; 13. Limiting rod; 14. First connecting groove; 15. Second connecting groove; 16. Inclined section; 17. First horizontal section; 18. First inclined surface; 19. Anti-detachment block; 20. Anti-detachment groove; 21. Second inclined surface; 22. Second chamfer; 23. Connecting protrusion; 24. Rotating groove; 25. Limiting ring; 26. Sliding sleeve; 27. Moving groove; 28. Guide groove; 29. ​​Guide block; 30. Operating hole; 31. Operating protrusion; 32. Sealing ring. Detailed Implementation

[0026] 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.

[0027] The following is in conjunction with the appendix Figures 1 to 6 The specific embodiments of the present invention will be described in further detail below.

[0028] Depend on Figures 1 to 6As shown, the present invention includes a crushing part 1 and a connecting part 2. In order to facilitate the assembly and disassembly of the drill bit, the crushing part 1 is detachably connected to the front side of the connecting part 2. The rear side of the connecting part 2 is fixedly connected to an end for connecting the drill rod. The middle part of the connecting part 2 is provided with a rotatable operating ring 3. The front side of the operating ring 3 is provided with multiple limiting frames 4 that can move back and forth with the rotation of the operating ring 3. The front side of each limiting frame 4 is connected to a disassembly mechanism 5. The front side of each disassembly mechanism 5 is connected to the rear end of the crushing part 1. The front side of the connecting part 2 is fixedly connected with multiple fixing blocks 6. The rear side of the crushing part 1 is provided with fixing grooves 7 that correspond one-to-one with the fixing blocks 6.

[0029] It should be noted that the crushing part 1 includes multiple cutting teeth and cutting wings, the material of which can be selected according to geological conditions, such as high-density polycrystalline diamond material. Multiple mud channels are provided at its front end. A circular hole is opened in the middle of the connecting part 2. The front end of the circular hole is connected to the mud channel, and the rear end of the circular hole is connected to the inside of the drill pipe for outputting high-pressure mud. The mud channel is used to flush the inside of the borehole under high pressure. This will not be described in detail here.

[0030] It should be noted that the end of the drill rod is connected to a horizontal directional drilling rig. The horizontal directional drilling rig can apply rotational torque and impact force to the drill rod for tunneling, which will not be described in detail here.

[0031] It should be understood that, in this embodiment, the breaking section 1 is equivalent to the drill bit of a conventionally known directional drill;

[0032] In use, the connecting part 2 can connect the crushing part 1 to the drill rod. The operating ring 3 can drive the limiting frame 4 to limit the disassembly mechanism 5, so that the connecting part 2 and the crushing part 1 can be tightly connected by the disassembly mechanism 5, which is convenient for the operator to operate. When it is necessary to disassemble the crushing part 1 and the connecting part 2, the operating ring 3 can be rotated to move the limiting frame 4, thereby releasing the limiting frame 4 from the disassembly mechanism 5. The crushing part 1 and the connecting part 2 can be quickly disassembled by the disassembly mechanism 5. When the connecting part 2 and the crushing part 1 are in the cooperating state, the fixing block 6 and the fixing groove 7 cooperate, and the contact surface of the two can apply the transmission torque and the pushing force to the crushing part 1.

[0033] In this embodiment, the multiple fixing grooves 7 are circular arc grooves evenly arranged around the circumference. The fixing block 6 is adapted to the fixing grooves 7, which can transmit a larger torque.

[0034] Furthermore, by Figures 1 to 6As shown, in order to facilitate the disassembly and assembly operations of the staff, the disassembly mechanism 5 includes a first connecting block 8, a second connecting block 9 and a third connecting block 10. A support block 11 is fixedly connected to the outer side of the connecting part 2 corresponding to the position of each first connecting block 8. Each first connecting block 8 is rotatably connected to the corresponding support block 11. The second connecting block 9 is rotatably connected to the end of the first connecting block 8 away from the support block 11. The third connecting block 10 is rotatably connected to the end of the second connecting block 9 away from the first connecting block 8.

[0035] It should be noted that when the disassembly mechanism 5 is in the locked state, the first connecting block 8 and the second connecting block 9 are at a negative angle. That is, during the locking process, the angle between the first connecting block 8 and the second connecting block 9 in the disassembly mechanism 5 changes from a positive angle protruding outwards to a zero angle where the first connecting block 8 and the second connecting block 9 are on the same plane, and finally stays in a self-locking state where the first connecting block 8 and the second connecting block 9 are at a negative angle. At this time, the second connecting block 9 is pressed against the third connecting block 10. When the third connecting block 10 is subjected to a backward force, there is a tendency for the negative angle between the first connecting block 8 and the second connecting block 9 to increase. The connection between the second connecting block 9 and the third connecting block 10 will prevent this tendency, thereby realizing the self-locking of the structure.

[0036] In use, the support block 11 can provide a rotation center for the first connecting block 8. The connection between the support block 11 and the connecting part 2 is chamfered, which can reduce the stress concentration between the two.

[0037] Furthermore, by Figures 1 to 6 As shown, in order to increase the stability of the device during operation, a limiting groove 12 is provided on both the left and right sides of the first connecting block 8, and two limiting rods 13 are fixedly connected to the front side of each limiting frame 4, and the front side of each limiting rod 13 is slidably connected to the corresponding limiting groove 12.

[0038] When in use, when the disassembly mechanism 5 is in the locked state, the limit frame 4 can be moved by rotating the operating ring 3, so that each limit rod 13 can cooperate with the corresponding limit groove 12, thus ensuring that the first connecting block 8 and the second connecting block 9 are always locked at a negative angle, reducing the probability of them disengaging when the connecting part 2 and the breaking part 1 are rotating together.

[0039] Furthermore, by Figures 1 to 6 As shown, in order to achieve a better locking effect, a plurality of first connecting grooves 14 are provided on the outer side of the connecting part 2, and a second connecting groove 15 is provided on the rear side of the breaking part 1 corresponding to the position of each third connecting block 10. The front end of each first connecting groove 14 is connected to the rear end of the corresponding second connecting groove 15.

[0040] Furthermore, by Figures 1 to 6 As shown, in order to facilitate operation by staff, the first connecting groove 14 includes an inclined part 16 and a first horizontal part 17. The first horizontal part 17 is connected to the front side of the inclined part 16, and the rear end of the third connecting block 10 is provided with a first inclined surface 18 that is adapted to the inclined part 16.

[0041] When in use, with the disassembly mechanism 5 in the locked state, the first inclined surface 18 contacts the inclined part 16 to limit the third connecting block 10.

[0042] Furthermore, by Figures 1 to 6 As shown, in order to facilitate the operation of the staff, an anti-detachment block 19 is fixedly connected inside the second connecting groove 15. An anti-detachment groove 20 adapted to the anti-detachment block 19 is opened on the side of the third connecting block 10 close to the anti-detachment block 19. A second inclined surface 21 is opened on the side of the third connecting block 10 away from the second connecting block 9. A second chamfer 22 adapted to the second inclined surface 21 is opened inside the second connecting groove 15.

[0043] In use, by setting the second inclined surface 21 and the second chamfer 22, when the disassembly mechanism 5 is in the locked state, the second inclined surface 21 and the second chamfer 22 are in close contact, which can make the third connecting block 10 have a downward force, thereby making the connection between the connecting part 2 and the breaking part 1 tighter. Under the action of the anti-detachment block 19, the probability of the third connecting block 10 detaching from the second connecting groove 15 can be reduced.

[0044] Furthermore, by Figures 1 to 6 As shown, in order to achieve a better connection effect, multiple connecting protrusions 23 are fixedly connected to the first connecting block 8 and the second connecting block 9. The first connecting block 8 and the second connecting block 9 are rotatably connected through the corresponding connecting protrusions 23. A rotating groove 24 is provided at one end of the third connecting block 10 near the second connecting block 9. The second connecting block 9 is rotatably connected to the third connecting block 10 through the rotating groove 24.

[0045] In use, by setting multiple connecting protrusions 23, the rotational connection between the first connecting block 8 and the second connecting block 9 is made more stable, and at the same time, the two can withstand greater force transmission and increase the connection strength between them.

[0046] Furthermore, by Figures 1 to 6 As shown, in order to reduce the resistance during operation of the device, a limiting ring 25 is provided on both the front and rear sides of the operating ring 3 and is fixedly connected to the connecting part 2. Both the front and rear ends of the operating ring 3 are rotatably connected to the corresponding limiting ring 25. A sliding sleeve 26 is slidably fitted on the outer side of the rear part of each limiting frame 4. Each sliding sleeve 26 is fixedly connected to the corresponding limiting ring 25.

[0047] Furthermore, by Figures 1 to 6 As shown, in order to facilitate the operation of the staff, the inside of the operating ring 3 is provided with a moving groove 27 that corresponds one-to-one with the limit frame 4. Each moving groove 27 is provided with multiple guide grooves 28. Multiple guide blocks 29 are fixedly connected to the upper and lower sides of the rear of the limit frame 4. Each guide block 29 is slidably connected to the corresponding guide groove 28.

[0048] In use, by setting a limiting ring 25, and by setting an inclined transition between the limiting ring 25 and the connecting part 2, the travel resistance during the operation of the device can be reduced. By setting a sliding sleeve 26, the forward and backward movement of the limiting frame 4 can be limited, and the bending moment resistance of the limiting frame 4 can be strengthened. By setting a moving groove 27, the forward and backward movement of the limiting frame 4 can be accommodated. By setting a guide groove 28 and a guide block 29, when the guide groove 28 moves under the rotation of the operating ring 3, the guide block 29 can move along the guide groove 28, and then the limiting frame 4 can move in the forward and backward direction through the guide block 29.

[0049] The guide groove 28 is also provided with elastic protrusions at both ends. When the guide block 29 is at the end of the guide groove 28, the elastic protrusions can limit the position of the guide block 29, thereby reducing the probability of its displacement.

[0050] Furthermore, by Figures 1 to 6 As shown, in order to reduce the probability of the device jamming, multiple operating holes 30 are provided on the outer side of the operating ring 3, multiple operating protrusions 31 are fixedly connected to the outer side of the operating ring 3, the outer side of the connecting part 2 is provided with threads, and a sealing ring 32 is provided on the rear side of the connecting part 2.

[0051] In use, by setting the operating hole 30, when there is a jam between the operating ring 3 and the limit ring 25, a steel rod can be inserted into the operating hole 30 to increase the rotation power arm and facilitate the rotation of the operating ring 3. By setting the operating protrusion 31, it is convenient for the operator to operate. A slot is opened at the rear of the connecting part 2, and the sealing ring 32 is connected to the slot, which can increase the sealing of the connection with the drill rod and reduce the probability of mud flowing out from the gap.

[0052] It should be noted that the connecting part 2 is connected to the drill rod by a thread, and the direction of the thread is adapted to the rotation direction of the drill rod. This allows the thread to be continuously tightened during operation, thereby reducing the probability of the connecting part 2 and the drill rod becoming loose. Similarly, the guide groove 28 is also inclined, and the inclination direction is adapted to the rotation direction of the drill rod. During the rotation of the connecting part 2, the friction of foreign objects such as soil and rocks in the drilling process on the operating ring 3 can keep the operating ring 3 continuously tightening the limiting frame 4, so that the limiting rod 13 at the front end of the limiting frame 4 can always maintain a fit with the limiting groove 12, reducing the probability of the disassembly mechanism 5 becoming loose.

[0053] When this invention is used, the connecting part 2 can connect the crushing part 1 to the drill rod. The operating ring 3 can drive the limiting frame 4 to limit the disassembly mechanism 5, thereby connecting the connecting part 2 and the crushing part 1 tightly through the disassembly mechanism 5, which is convenient for the operator. When it is necessary to disassemble the crushing part 1 and the connecting part 2, the operating ring 3 can be rotated to move the limiting frame 4, thereby releasing the limiting frame 4 from limiting the disassembly mechanism 5. Then the crushing part 1 and the connecting part 2 can be quickly disassembled through the disassembly mechanism 5. When the connecting part 2 and the crushing part 1 are in the cooperating state, the fixing block 6 and the fixing groove 7 cooperate, and the contact surface of the two can apply the transmission torque and the pushing force to the crushing part 1.

[0054] This invention features a novel structure, ingenious design, and simple and convenient operation. This design effectively facilitates the assembly and disassembly of drill bits, increases the stability of the device during operation, achieves a better locking effect, facilitates operator operation, achieves a better connection effect, and reduces the resistance during device operation.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 directional drilling bit that is easy to change quickly, comprising a breaking section and a connecting section, characterized in that: The crushing part is detachably connected to the front side of the connecting part. The rear side of the connecting part is fixedly connected to an end for connecting a drill rod. The middle part of the connecting part is provided with a rotatable operating ring. The front side of the operating ring is provided with multiple limiting frames that can move back and forth with the rotation of the operating ring. The front side of each limiting frame is connected to a disassembly mechanism. The front side of each disassembly mechanism is connected to the rear end of the crushing part. The front side of the connecting part is fixedly connected with multiple fixing blocks. The rear side of the crushing part is provided with fixing grooves that correspond one-to-one with the fixing blocks.

2. The directional drilling bit that is easy to quickly change according to claim 1, characterized in that: The disassembly mechanism includes a first connecting block, a second connecting block, and a third connecting block. A support block is fixedly connected to the outer side of the connecting part corresponding to the position of each first connecting block. Each first connecting block is rotatably connected to the corresponding support block. The second connecting block is rotatably connected to the end of the first connecting block away from the support block. The third connecting block is rotatably connected to the end of the second connecting block away from the first connecting block.

3. A directional drilling bit that is easy to quickly change according to claim 2, characterized in that: The first connecting block has limit grooves on both its left and right sides, and two limit rods are fixedly connected to the front side of each limit frame. The front side of each limit rod is slidably connected to the corresponding limit groove.

4. A directional drilling bit that is easy to quickly change according to claim 2, characterized in that: The outer side of the connecting part is provided with a plurality of first connecting grooves, and the rear side of the breaking part is provided with a second connecting groove corresponding to the position of each third connecting block. The front end of each first connecting groove is connected to the rear end of the corresponding second connecting groove.

5. A directional drilling bit that is easy to quickly change according to claim 4, characterized in that: The first connecting groove includes an inclined portion and a first horizontal portion. The first horizontal portion is connected to the front side of the inclined portion, and the rear end of the third connecting block has a first inclined surface adapted to the inclined portion.

6. A directional drilling bit that is easy to quickly change according to claim 4, characterized in that: An anti-detachment block is fixedly connected inside the second connecting groove. An anti-detachment groove adapted to the anti-detachment block is provided on the side of the third connecting block near the anti-detachment block. A second inclined surface is provided on the side of the third connecting block away from the second connecting block. A second chamfer adapted to the second inclined surface is provided inside the second connecting groove.

7. A directional drilling bit that is easy to quickly change according to claim 2, characterized in that: Both the first connecting block and the second connecting block are fixedly connected with multiple connecting protrusions. The first connecting block and the second connecting block are rotatably connected through the corresponding connecting protrusions. The third connecting block has a rotating groove at one end near the second connecting block. The second connecting block is rotatably connected to the third connecting block through the rotating groove.

8. A directional drilling bit that is easy to quickly change according to claim 1, characterized in that: The operating ring is provided with limiting rings on both the front and rear sides, which are fixedly connected to the connecting part. The front and rear ends of the operating ring are rotatably connected to the corresponding limiting rings. A sliding sleeve is slidably fitted on the outer side of the rear part of each limiting frame, and each sliding sleeve is fixedly connected to the corresponding limiting ring.

9. A directional drilling bit that is easy to quickly change according to claim 1, characterized in that: The operating ring has a moving groove inside that corresponds to the limiting frame. Each moving groove has multiple guide grooves inside. Multiple guide blocks are fixedly connected to the upper and lower sides of the rear of the limiting frame. Each guide block is slidably connected to the corresponding guide groove.

10. A directional drilling bit that is easy to quickly change according to claim 1, characterized in that: The operating ring has multiple operating holes on its outer side, and multiple operating protrusions are fixedly connected to the outer side of the operating ring. The outer side of the connecting part is threaded, and a sealing ring is provided on the rear side of the connecting part.

Images