A high-efficiency drilling bit for soft soil drilling

Abstract

This invention discloses a high-efficiency drilling bit for soft soil drilling. Its structure includes a threaded connector, a water spraying device, and a drill bit. The bottom end of the connector is connected to the end face of the water spraying device, and the drill bit is connected to the bottom end face of the water spraying device. The water spraying device includes a water spray block, a water storage tank, a water guide tank, and a friction groove. The friction block is connected to the bottom end face of the threaded connector. The water storage tank is located on the inner end face of the water spray block, and the water guide tank is connected to the bottom end face of the water storage tank. This invention utilizes a concentrated groove to reduce water flow and increase water pressure. The water flow is then guided upwards through the groove, allowing it to impact the soil at the side of the borehole, softening the soil, reducing friction between the drill bit and the soil, increasing the drill bit's rotation speed, and accelerating drilling. Furthermore, when the drill bit drills downwards, the soil flows upwards along the end face of the water spray block, preventing soil from entering the groove and allowing the water to continuously spray outwards to soften the soil.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, specifically a high-efficiency drilling bit for drilling soft soil. Background Technology

[0002] Drilling is an engineering process that uses mechanical equipment to drill cylindrical holes of a certain depth into the formation. According to the rock breaking method and the type of tools used, it can be divided into percussion drilling and rotary drilling. In geological work, drilling equipment is used to drill cylindrical holes with a small diameter and a large depth into the ground. The diameter and depth of the well depend on the purpose of drilling and the depth of mineral deposits. The diameter of the well is larger when drilling for oil, natural gas and groundwater. The cutting or grinding action generated by the rotation of the drill bit to break the rock is the most common drilling method at present. It is faster than percussion drilling and easier to deal with complex situations such as well collapse and blowout.

[0003] Based on the above findings of the inventors, the existing high-efficiency drilling bit for soft soil drilling has the following main shortcomings. For example, when drilling in soft soil, the drill bit needs to rotate back and forth to drill holes in the soft soil. The deeper the drill bit drills in the soft soil, the greater the friction between the drill bit and the soil will gradually increase, which will slow down the rotation speed of the drill bit in the soil and thus affect the drilling speed. Summary of the Invention

[0004] To address the above problems, this invention provides a high-efficiency drilling bit for soft soil drilling.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a high-efficiency drilling bit for soft soil drilling, the structure of which includes a threaded connector, a water spraying device, and a drill bit, wherein the bottom end of the connector is connected to the end face of the water spraying device, and the drill bit is connected to the bottom end face of the water spraying device.

[0006] Furthermore, the water spraying device includes a water spray block, a water storage tank, a water guide tank, and a friction groove. The water spray block is connected to the bottom end face of the threaded connector. The water storage tank is located on the inner end face of the water spray block. The water guide tank is connected to the bottom end face of the water storage tank. There are four friction grooves arranged around the bottom side of the water spray block. The end faces of the water storage tank and the water guide tank are connected.

[0007] Furthermore, the water guiding channel includes a guiding channel, a guiding block, and a spraying channel. The guiding channel is located at the bottom of the water storage tank, the guiding block is installed in the middle of the guiding channel, and the spraying channel has four end faces connected to the guiding channel. The spraying channel is connected to the end face of the friction channel, and the spraying channel is arranged equidistantly around the end face of the guiding channel.

[0008] Furthermore, the spraying channel includes a concentrating channel, a channel body, and a retaining block. The concentrating channel is located on the side end face of the guide channel. One end of the channel body is connected to the concentrating channel, and the other end is connected to the end face of the friction channel. The retaining block is located in the middle of the channel body. The width of the concentrating channel gradually decreases from the inner end to the outer end. The channel body is inclined from bottom to top. The retaining block is located in the middle of the channel body.

[0009] Furthermore, the flow guide block includes a connecting seat, a flow guide, and partitions. The connecting seat is fixedly connected to the bottom center of the flow guide groove. The flow guide is connected to the top of the connecting seat. There are four partitions arranged around the end face of the flow guide. The flow guide is conical in shape.

[0010] Furthermore, the drill bit includes a threaded block, a drill bit, and an impact head. The threaded block is connected to the bottom end of the water spraying device, the drill bit is fixedly connected to the bottom end of the threaded block, and the impact head is disposed on the bottom end face of the drill bit. The drill bit is conical in shape, and the end face of the drill bit is threaded.

[0011] Furthermore, the impact head includes a fixed base, friction blocks, and recessed grooves. The fixed base is fixedly connected to the bottom end face of the drill bit. There are three friction blocks arranged around the bottom end face of the fixed base. There are four or more recessed grooves arranged on the bottom end face of the friction blocks. The end face of the recessed groove is arc-shaped. Beneficial effects

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes a centralized trough to reduce water flow and increase water pressure. The trough then guides the water flow upward, allowing it to impact the soil at the side of the borehole, softening the soil, reducing friction between the drill bit and the soil, increasing the drill bit's rotation speed, and accelerating the drilling process. Furthermore, as the drill bit drills downward, the soil flows upward along the end face of the water spray block, preventing soil from entering the trough and allowing the water to continuously spray outward to soften the soil.

[0013] 2. This invention utilizes a drill bit to drive friction blocks to rotate back and forth, allowing the three friction blocks to rub against the soil and rocks, enabling rapid drilling of the soil's end face. Furthermore, the friction blocks can rub against the rocks through arc-shaped grooves, breaking the rocks and increasing the drilling speed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of a high-efficiency drilling bit for soft soil drilling according to the present invention.

[0015] Figure 2 This is a front view structural schematic diagram of the water spray device of the present invention.

[0016] Figure 3 This is a top view of the water guide channel structure of the present invention.

[0017] Figure 4 This is a front view schematic diagram of the spray groove structure of the present invention.

[0018] Figure 5 This is a schematic diagram of the main structure of the guide block of the present invention.

[0019] Figure 6 This is a front view schematic diagram of the drill bit structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the main structure of the impact head of the present invention.

[0021] In the diagram: 1. Threaded connector; 2. Water spray device; 3. Drill bit; 21. Water spray block; 22. Water storage tank; 23. Water guide channel; 24. Friction channel; 231. Flow guide channel; 232. Flow guide block; 233. Spray channel; a1. Concentration channel; a2. Channel body; a3. Retaining block; b1. Connecting seat; b2. Flow guide; b3. Separator; c1. Threaded block; c2. Drill bit; c3. Impact head; c3. Fixed seat; c31. Friction block; c32. Recessed groove; c33. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] Example 1: Please refer to Figures 1-5 The specific embodiments of the present invention are as follows: Its structure includes a threaded connector 1, a water spraying device 2, and a drill bit 3. The bottom end of the connector 1 is connected to the end face of the water spraying device 2, and the drill bit 3 is connected to the bottom end face of the water spraying device 2.

[0024] The water spraying device 2 includes a water spraying block 21, a water storage tank 22, a water guiding channel 23, and a friction channel 24. The water spraying block 21 is connected to the bottom end face of the threaded connector 1. The water storage tank 22 is located on the inner end face of the water spraying block 21. The water guiding channel 23 is connected to the bottom end face of the water storage tank 22. There are four friction channels 24, which are arranged around the bottom side of the water spraying block 21. The end faces of the water storage tank 22 and the water guiding channel 23 are connected, which is beneficial for the drill bit 3 to rotate and drill holes through the water guiding pipe 1. Then, by introducing water into the water storage tank 22, the water can be sprayed out through the water guiding channel 23 to the friction channel 24 to soften the soil and reduce the friction between the drill bit 3 and the soil.

[0025] The water guide channel 23 includes a guide channel 231, a guide block 232, and a jet channel 233. The guide channel 231 is located at the bottom of the water storage tank 22. The guide block 232 is installed in the middle of the guide channel 231. The jet channel 233 has four end faces connected to the guide channel 231 and is connected to the end face of the friction groove 24. The jet channels 233 are arranged equidistantly around the end face of the guide channel 231, which is beneficial for concentrating the water flow through the water storage tank 22 and guiding it into the guide channel 231, so that the water flow can be concentrated and sprayed into the jet channel 233, allowing the water flow to impact the side of the borehole.

[0026] The spraying channel 233 includes a concentrating channel a1, a channel body a2, and a retaining block a3. The concentrating channel a1 is located on the side end face of the guide channel 231. One end of the channel body a2 is connected to the concentrating channel a1, and the other end is connected to the end face of the friction channel 24. The retaining block a3 is located in the middle of the channel body a2. The width of the concentrating channel a1 gradually decreases from the inner end to the outer end. The channel body a2 is inclined at 45 degrees from bottom to top. The retaining block a3 is located in the middle of the channel body a2, which helps to guide the water flow upward through the channel body a2, so that when the drill bit 3 drills downward, soil is prevented from entering the interior of the channel body a2.

[0027] The flow guide block 232 includes a connecting seat b1, a flow guide b2, and a separator b3. The connecting seat b1 is fixedly connected to the bottom center of the flow guide groove 231. The flow guide b2 is connected to the top of the connecting seat b1. There are four separators b3 arranged around the end face of the flow guide b2. The flow guide b2 is conical in shape, which facilitates the flow of water to the four spray grooves 233 through the separators b3, thereby increasing the speed of water flow.

[0028] Based on the above embodiments, the specific working principle is as follows: A threaded connector 1 is connected to a water pipe 1. The water pipe 1 drives the drill bit 3 to rotate for drilling. The water spraying device 2 can rub against the soil, and water is guided into the water storage tank 22, allowing the water flow to be sprayed from the water guide 23 to the friction groove 24. This allows the water flow to impact the soil, softening it and reducing the friction between the drill bit 3 and the soil, thus increasing the drilling speed. The water storage tank 22 then concentrates the water flow and directs it into the guide groove 231, allowing the water flow to impact the end face of the guide block 232 and disperse it, concentrating the water flow and spraying it into the spray groove 233. This allows the water flow to impact the side of the borehole, softening the soil at the borehole end and accelerating the drilling speed. Finally, the concentration groove a1 reduces the water flow... The flow of water increases the water pressure, and the water is then guided upwards through the trough a2. When the drill bit 3 drills downwards, the soil flows upwards along the end face of the water spray block 21, preventing soil from entering the interior of the trough a2. The soil retaining block a3, located on the end face of the trough a2, blocks the soil, preventing it from clogging the port of the trough a2 and improving the softening effect of the water flow on the soil. Finally, the water flows vertically downwards in the water storage tank 22, and is guided to the side by the end face of the guide fluid b2. Then, it is guided to the four spray slots 233 by the separator b3, which increases the speed of the water flow and the intensity of the water spray, softening the soil at the borehole end face, reducing the friction between the drill bit 3 and the soil, and improving the drilling efficiency.

[0029] Example 2: Please refer to Figures 6-7 The specific embodiments of the present invention are as follows: The drill bit 3 includes a threaded block c1, a drill bit c2, and an impact head c3. The threaded block c1 is connected to the bottom end of the water spray device 2. The drill bit c2 is fixedly connected to the bottom end of the threaded block c1. The impact head c3 is located on the bottom end face of the drill bit c2. The drill bit c2 is conical in shape and has threads on its end face, which facilitates downward impact by the impact head c3, allowing the threaded block c1 to drill downward along with the rotation of the drill bit 3.

[0030] The impact head c3 includes a fixed base c31, friction blocks c32, and recessed grooves c33. The fixed base c31 is fixedly connected to the bottom end face of the drill bit c2. There are three friction blocks c32 arranged around the bottom end face of the fixed base c31. There are four or more recessed grooves c33 arranged on the bottom end face of the friction blocks c32. The end face of the recessed groove c33 is arc-shaped, which facilitates the friction between the friction blocks c32 and the rock through the arc-shaped recessed grooves c33.

[0031] Based on the above embodiments, the specific working principle is as follows: The impact head c3 is used to impact and break the rock when drilling, and the threaded block c1 can impact the soil downward along with the rotation of the drill bit 3, increasing the drilling speed of the drill bit 3. Then, the drill bit c2 drives the friction block c32 to rotate back and forth, so that the three friction blocks c32 can rub against the soil and rock, which can quickly drill the end face of the soil. The friction block c32 can rub against the rock through the arc-shaped groove c33, breaking the rock, so that the drill bit 3 can drill downward and increase the drilling speed.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-efficiency drilling bit for soft soil drilling, the structure of which includes a threaded connector (1), a water spraying device (2), and a drill bit (3), wherein the bottom end of the threaded connector (1) is connected to the end face of the water spraying device (2), and the drill bit (3) is connected to the bottom end face of the water spraying device (2). The water spraying device (2) includes a water spray block (21), a water storage tank (22), a water guide channel (23), and a friction groove (24). The water spray block (21) is connected to the bottom end face of the threaded connector (1). The water storage tank (22) is located on the inner end face of the water spray block (21). The water guide channel (23) is connected to the bottom end face of the water storage tank (22). There are four friction grooves (24), and the friction grooves (24) are arranged around the bottom side of the water spray block (21). The water guide channel (23) includes a guide channel (231), a guide block (232), and a spray channel (233). The guide channel (231) is located at the bottom of the water storage tank (22). The guide block (232) is installed in the middle of the guide channel (231). The spray channel (233) has four sections and is connected to the end face of the guide channel (231). The spray channel (233) is connected to the end face of the friction channel (24). The spraying channel (233) includes a concentrator channel (a1), a channel body (a2), and a retaining block (a3). The concentrator channel (a1) is located on the side end face of the guide channel (231). One end of the channel body (a2) is connected to the concentrator channel (a1), and the other end is connected to the end face of the friction channel (24). The retaining block (a3) ​​is located in the middle of the channel body (a2). The flow guide block (232) includes a connecting seat (b1), a flow guide (b2), and a separator (b3). The connecting seat (b1) is fixedly connected to the bottom center of the flow guide groove (231). The flow guide (b2) is connected to the top of the connecting seat (b1). There are four separators (b3), which are arranged around the end face of the flow guide (b2).

2. The high-efficiency drilling bit for soft soil drilling according to claim 1, characterized in that: The drill bit (3) includes a threaded block (c1), a drill bit body (c2), and an impact head (c3). The threaded block (c1) is connected to the bottom end face of the water spray device (2), the drill bit body (c2) is fixedly connected to the bottom end of the threaded block (c1), and the impact head (c3) is located on the bottom end face of the drill bit body (c2).

3. The high-efficiency drilling bit for soft soil drilling according to claim 2, characterized in that: The impact head (c3) includes a fixed base (c31), friction blocks (c32), and recessed grooves (c33). The fixed base (c31) is fixedly connected to the bottom end face of the drill bit body (c2). There are three friction blocks (c32), which are arranged around the bottom end face of the fixed base (c31). There are four or more recessed grooves (c33), which are arranged on the bottom end face of the friction blocks (c32).

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