Cone barrel-shaped drilling tool and construction method for circularly collecting slag in rock drilling

Abstract

The invention relates to the technical field of rock engineering construction, in particular to the technical field of rock stratum drilling construction, and particularly relates to a cone cylindrical drilling tool and a construction method for rock drilling circulating slag collection. The problems that a cone is seriously abraded, cost is increased and construction efficiency is low due to the fact that a conventional cone barrel-shaped drilling tool repeatedly crushes rock slag are solved, large-particle rock slag is prevented from being repeatedly crushed, the abrasion degree of the cone is reduced, the construction cost is reduced, and the construction efficiency is improved, the cone barrel comprises a barrel body with the cone arranged on the bottom edge, a precipitation bin is arranged on the upper portion of the barrel body, and a coring pipe is arranged on the lower portion of the barrel body; a slurry suction pipe for guiding slurry into the coring pipe is arranged at the top of the barrel; at least one inner rib for generating rotational flow in the coring pipe is arranged on the inner wall of the coring pipe, and at least one spiral slag discharging pipe for guiding slag slurry at the bottom into the precipitation bin is arranged in the side wall of the barrel; the lower end of the spiral slag discharge pipe is a lower slag slurry suction port and is positioned at the bottom edge of the coring pipe, and the upper end of the spiral slag discharge pipe is an upper rotational flow slag discharge port communicated with the precipitation bin.

Description

Technical Field

[0001] The present invention relates to the technical field of rock engineering construction, in particular to the technical field of rock stratum drilling construction, and in particular to a cone-shaped cylindrical drill tool and a construction method for rock drilling circulation slag collection. Background Art

[0002] As is well known, a rotary drill rig drills holes in rock formations using a cone-shaped cylindrical drill tool. For example, the utility model patent with prior art publication number CN217106832 U discloses a cone drill tool and a rotary drilling rig, which include a cylinder and a cone mechanism circumferentially arranged on the bottom surface of the cylinder, and a slag guide mechanism including a slag guide bar, which is spirally arranged around the outer wall of the cylinder.

[0003] Then, the conventional rotary drilling rig's cylindrical drill bit is immersed in mud for cooling during operation. Although there is an external slag guide to discharge the rock debris upward, after the cone drills the rock, large particles of rock debris will fall from the outer wall of the drill bit and then settle at the bottom of the drill bit. When drilling again, the large particles of rock debris in the hole will be ground into small particles of rock powder after multiple grindings, resulting in repeated crushing of large particles of rock debris and rapid wear of the cone, which not only increases costs but also reduces construction efficiency. Summary of the Invention

[0004] The present invention provides a roller cone cylindrical drill tool and a construction method for cyclic slag collection in rock drilling, which solves the problems of severe roller wear, increased costs and low construction efficiency caused by repeated crushing of rock slag by conventional roller cone cylindrical drill tools, avoids repeated crushing of large particles of rock slag, reduces the degree of roller wear, reduces construction costs and improves construction efficiency.

[0005] The present invention is achieved through the following technical solutions: A cone-shaped cylindrical drilling tool comprises a cylindrical body with a cone provided on the bottom edge, wherein the upper portion of the cylindrical body is a sedimentation chamber and the lower portion is a core tube; The upper part of the cylinder is provided with a slurry suction pipe for introducing slurry into the core tube; The inner wall of the core tube is provided with at least one internal rib for generating a vortex in the core tube, and the side wall of the cylinder is provided with at least one spiral slag discharge pipe for introducing the slurry at the bottom into the sedimentation bin. The lower end of the spiral slag discharge pipe is a lower slag suction port and is located at the bottom edge of the core tube, and the upper end is an upper vortex slag discharge port connected to the sedimentation bin.

[0006] Furthermore, the direction of the lower slag slurry suction port is the same as the forward rotation direction of the cylinder; The spiral slag discharge pipe is spirally distributed along the forward rotation direction of the cylinder.

[0007] Furthermore, the inner ribs are spirally distributed on the inner wall of the core pipe, and the spiral direction of the inner ribs is opposite to the spiral direction of the spiral slag discharge pipe.

[0008] Furthermore, a transverse partition is provided in the cylinder, and the sedimentation bin and the core tube are separated vertically by the partition; The partition is provided with a pipe hole, and the slurry suction pipe passes through the sedimentation bin from the top of the cylinder and is communicated with the pipe hole of the partition.

[0009] Furthermore, the upper swirl flow slag discharge port is located on the side wall of the sedimentation bin near the top, and the top of the sedimentation bin is provided with a slag discharge port baffle facing the upper swirl flow slag discharge port.

[0010] Furthermore, a slag collection and cleaning port that can be opened and closed is provided on the side wall of the sedimentation bin near the bottom, and an overflow opening is provided on the top of the sedimentation bin.

[0011] Furthermore, the outer side of the spiral slag discharge pipe protrudes from the outer surface of the cylinder.

[0012] Furthermore, the number of the spiral slag discharge pipes and internal ribs is 4-6.

[0013] A construction method for rock drilling with cyclic slag collection, using the above-mentioned cone-shaped cylindrical drill tool to drill holes, comprises the following steps: S10, connecting the drill rod to the cone-shaped drill tool; S20, inserting the cone-shaped drill bit into the pile hole to perform drilling operation; S30, the cone-shaped cylindrical drill bit rotates forward to drill into the rock formation, and the cone-shaped cylindrical drill bit is immersed in the mud for cooling; S40, as the cone-shaped drill bit rotates forward, the slurry suction pipe sucks the slurry in the borehole, and under the action of the rotational force, it rushes into the core barrel, forms a vortex along the internal ribs, and is guided to the bottom of the core barrel; S50: The rock slag generated by the cone crushing the rock formation is mixed with mud to form mud slag. Under the positive rotation force of the cone cylindrical drill bit and the swirling force in the core barrel, the mud slag enters the spiral slag discharge pipe from the lower slag suction port, and then enters the sedimentation bin through the upper swirling flow discharge port; the rock slag is settled in the sedimentation bin. S60. When the lower slag slurry suction port is blocked, the cone-shaped cylindrical drill bit is reversed to allow the mud and slag in the spiral slag discharge pipe to flow back and flush the blocked lower slag slurry suction port.

[0014] Furthermore, the rotation speed of the cone-shaped drill bit is 30-40 r / min.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The cone-shaped cylindrical drill tool of the present invention is designed with a settling bin and a core tube. A suction pipe for introducing mud into the core tube is provided at the top of the cylinder. The inner wall of the core tube is provided with at least one inner rib for generating a vortex in the core tube. The side wall of the core tube is provided with at least one spiral slag discharge pipe for introducing the slurry at the bottom into the settling bin. Under the positive rotation force of the cone-shaped cylindrical drill tool and the vortex force in the core tube, the mud and rock debris enter the spiral slag discharge pipe from the lower slag suction port and then enter the settling bin through the upper vortex slag discharge port; the rock debris settles in the settling bin, thereby carrying large rock debris away from the bottom of the hole and entering the settling bin for sedimentation, reducing repeated crushing and reducing wear on the cone. The rock drilling cycle slag collection construction method of the present invention uses the above-mentioned cone cylindrical drill tool to drill holes, thereby avoiding the repeated crushing of large particles of rock slag, reducing the degree of cone wear, reducing construction costs, and improving construction efficiency. 2. A slag discharge port baffle is provided on the top of the sedimentation bin, facing the upper slag discharge port. The slag discharge port baffle can quickly settle the mud slag to the bottom of the sedimentation bin; 3. An openable and closable slag collection and cleaning port is provided on the side wall of the sedimentation bin near the bottom to facilitate the cleaning of the rock slag in the sedimentation bin. An overflow opening is provided on the top of the sedimentation bin to facilitate the smooth discharge of the stratified mud in the sedimentation bin to the outside of the drilling tool, realizing the mud circulation flow. The rock slag mud can be continuously introduced into the sedimentation bin to settle the rock slag, thereby improving the efficiency of the circulating slag collection. 4. The outer side of the spiral slag discharge pipe protrudes from the outer surface of the cylinder, which can guide part of the rock slag slurry outside the drill tool along the outer wall of the spiral slag discharge pipe to the top of the sedimentation bin, and enter the sedimentation bin through the overflow opening for slag collection, thereby improving the slag collection efficiency and fully collecting slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of the cone-shaped drilling tool of the present invention; Figure 2 This is a schematic diagram of the interior of the cone-shaped drill tool of the present invention; Figure 3 This is a schematic diagram of the interior of the settling chamber of the cone-shaped drill bit of the present invention; Figure 4 Schematic diagram of the bottom of the cone-shaped drill bit of the present invention; In the figure: 1. Slurry suction pipe, 2. Cylinder, 3. Slag collection and cleaning port, 4. Spiral slag discharge pipe, 5. Coring pipe, 6. Cone, 7. Lower slag suction port, 8. Internal ribs, 9. Sedimentation chamber, 10. Upper slag discharge port, 11. Slag discharge port baffle, 12. Overflow opening. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] In the description of the invention, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0019] Example 1 like Figure 1-4 As shown, this embodiment discloses a roller cone-shaped drill tool, which mainly includes a grouting pipe 1, a barrel 2, a roller cone 6, and a spiral slag discharge pipe 4. Multiple roller cones 6 are evenly distributed along the circumference on the bottom edge of the barrel 2, and a square head is installed at the top of the barrel 2 to connect with the drill pipe.

[0020] A partition is welded transversely inside the cylinder 2, which divides the space inside the cylinder 2 into a sedimentation bin 9 and a core sampling tube 5 in the upper and lower parts. A pipe hole is reserved on the partition, and the slurry suction pipe 1 passes through the sedimentation bin 9 from the top of the cylinder 2 and is connected to the pipe hole of the partition. Such a design enables the slurry suction pipe 1 to guide the mud outside the drilling tool into the core sampling tube 5. A slag collection and cleaning port 3 that can be opened and closed from the outside is provided near the bottom of the side wall of the sedimentation bin 9. Such a design facilitates the cleaning of the slag collected in the sedimentation bin 9. A plurality of overflow openings 12 are provided at the top of the sedimentation bin 9. Such a design facilitates the overflow of the mud in the sedimentation bin 9. It is worth noting that due to its relatively high density, the rock slag will settle to the bottom of the sedimentation bin 9 and will not be discharged from the overflow opening 12.

[0021] 4-6 spiral slag discharge pipes 4 are evenly arranged along the circumference of the side wall of the cylinder 2. The lower end of the spiral slag discharge pipe 4 is a lower slag slurry suction port 7 and is located at the bottom edge of the core tube 5. The outline size of the lower slag slurry suction port 7 is smaller than the outline size of the gear 6. The upper end of the spiral slag discharge pipe 4 is an upper slag discharge port 10. The upper slag discharge port is located near the top of the side wall of the sedimentation bin 9, and a slag discharge port baffle 11 facing the upper slag discharge port is installed on the top of the sedimentation bin 9. It is worth noting that the upper slag discharge port can also be located in the middle or lower part of the sedimentation bin. The spiral slag discharge pipe 4 is spirally distributed along the forward rotation direction of the cylinder 2. The direction of the lower slag slurry suction port 7 is the same as the forward rotation direction of the cylinder 2. When the cylinder 2 rotates forward, the rock slag can smoothly pass through the lower slag slurry suction port 7 into the spiral slag discharge pipe 4, thereby guiding the slag slurry at the bottom into the sedimentation bin 9. In this solution, the outer side of the spiral slag discharge pipe 4 protrudes from the outer surface of the cylinder 2, so that the outer side of the cylinder 2 can have a certain slag guiding function, so that part of the rock slag mud outside the drill bit is guided along the outer wall of the spiral slag discharge pipe to the top of the sedimentation bin, and enters the sedimentation bin through the overflow opening for slag collection.

[0022] The inner wall of the core tube 5 is machined with 4-6 internal ribs 8, which are arranged in a spiral pattern. The spiral direction of the internal ribs 8 is opposite to that of the spiral slag discharge tube 4. When the drilling rig rotates, the mud in the core tube 5 is swirled. At the same time, the internal ribs 8 can straighten the core and reduce the impact of the core on the inner wall of the cylinder 2.

[0023] Taking the Yantai Airport project as an example, a hole with a diameter of 1 meter needs to be drilled on the ground. Based on the above-mentioned cone-shaped drill bit, this solution also provides a construction method for rock drilling circulation slag collection, including the following steps: S10, the outer diameter of the cone-shaped drill bit is 1 meter, and the drill rod is connected to the square head of the cone-shaped drill bit; S20, inserting the cone-shaped cylindrical drill into the pile hole to perform drilling operation, the rotation speed of the cone-shaped cylindrical drill is 30-40 r / min, and the drilling speed is 0.9 m / h; S30, the cone-shaped cylindrical drill bit rotates forward to drill into the rock formation, and the cone-shaped cylindrical drill bit is immersed in the mud for cooling; S40, as the cone-shaped drill bit rotates forward, the slurry suction pipe 1 sucks the slurry in the borehole, and under the action of the rotational force, it rushes into the core tube 5, forms a vortex along the inner ribs 8, and is guided to the bottom of the core tube 5; S50: The rock slag generated by the cone crushing the rock formation is mixed with the mud to form mud slag. Under the positive rotation force of the cone cylindrical drill bit and the swirling force in the core tube 5, the mud slag enters the spiral slag discharge pipe 4 from the lower slag suction port 7, and then enters the sedimentation bin 9 through the upper swirling flow slag discharge port 10; At the same time, since the outer side of the spiral slag discharge pipe 4 protrudes from the outer surface of the cylinder 2, the outer side of the cylinder 2 can have a certain slag guiding function, so that part of the rock slag mud outside the drill bit is guided along the outer wall of the spiral slag discharge pipe to the top of the sedimentation bin, and enters the sedimentation bin through the overflow opening for slag collection.

[0024] When the mud slag enters the sedimentation bin 9, the slag will settle in the sedimentation bin 9 because the density of the slag is greater than that of the mud; and the stratified mud will be smoothly discharged to the outside of the drilling tool through the overflow opening, realizing the circulation of the mud; S60. When the footage efficiency of the cone-shaped cylindrical drill bit is significantly reduced, it can be determined that the lower slag slurry suction port 7 is blocked. When the lower slag slurry suction port 7 is blocked, the cone-shaped cylindrical drill bit is reversed to allow the mud and slag in the spiral slag discharge pipe 4 to flow back and clear the blocked lower slag slurry suction port 7. S70. After the cone-shaped drill bit is pulled out of the borehole, the slag collection and cleaning port is opened to clean the slag in the sedimentation bin.

[0025] The rock drilling cyclic slag collection method described in this invention utilizes the aforementioned cone-shaped cylindrical drill tool for drilling, thereby avoiding the repeated crushing of large rock slag particles, reducing cone wear, lowering construction costs, and improving efficiency. Compared to conventional cone-shaped cylindrical drill tools, this method increases efficiency by 2.5 times, saving costs by as much as 50%.

[0026] Example 2 Taking the Xiamen project as an example, it is necessary to drill a hole with a diameter of 1.2 meters on the ground. This solution provides a construction method for rock drilling circulation slag collection, including the following steps: S10, the outer diameter of the cone-shaped drill bit is 1.2 meters, and the drill rod is connected to the square head of the cone-shaped drill bit; S20, inserting the cone-shaped cylindrical drill into the pile hole to perform drilling operation, the rotation speed of the cone-shaped cylindrical drill is 40 r / min, and the drilling speed is 1.1 m / h; S30, the cone-shaped cylindrical drill bit rotates forward to drill into the rock formation, and the cone-shaped cylindrical drill bit is immersed in the mud for cooling; S40, as the cone-shaped drill bit rotates forward, the slurry suction pipe 1 sucks the slurry in the borehole, and under the action of the rotational force, it rushes into the core tube 5, forms a vortex along the inner ribs 8, and is guided to the bottom of the core tube 5; S50: The rock slag generated by the cone crushing the rock formation is mixed with the mud to form mud slag. Under the positive rotation force of the cone cylindrical drill bit and the swirling force in the core tube 5, the mud slag enters the spiral slag discharge pipe 4 from the lower slag suction port 7, and then enters the sedimentation bin 9 through the upper swirling flow slag discharge port 10; At the same time, since the outer side of the spiral slag discharge pipe 4 protrudes from the outer surface of the cylinder 2, the outer side of the cylinder 2 can have a certain slag guiding function, so that part of the rock slag mud outside the drill bit is guided along the outer wall of the spiral slag discharge pipe to the top of the sedimentation bin, and enters the sedimentation bin through the overflow opening for slag collection.

[0027] When the mud slag enters the sedimentation bin 9, the slag will settle in the sedimentation bin 9 because the density of the slag is greater than that of the mud; and the stratified mud will be smoothly discharged to the outside of the drilling tool through the overflow opening, realizing the circulation of the mud; S60. When the footage efficiency of the cone-shaped cylindrical drill bit is significantly reduced, it can be determined that the lower slag slurry suction port 7 is blocked. When the lower slag slurry suction port 7 is blocked, the cone-shaped cylindrical drill bit is reversed to allow the mud and slag in the spiral slag discharge pipe 4 to flow back and clear the blocked lower slag slurry suction port 7. S70. After the cone-shaped drill bit is pulled out of the borehole, the slag collection and cleaning port is opened to clean the slag in the sedimentation bin.

[0028] The rock drilling cyclic slag collection method described in this invention utilizes the aforementioned cone-shaped cylindrical drill tool for drilling, thereby avoiding the repeated crushing of large rock slag particles, reducing cone wear, lowering construction costs, and improving efficiency. Compared to conventional cone-shaped cylindrical drill tools, this method increases efficiency by three times, saving costs by at least 50%.

Claims

1. A cone-shaped cylindrical drilling tool, comprising a cylindrical body (2) with a cone (6) provided on the bottom edge, characterized in that: The upper part of the cylinder (2) is a sedimentation chamber (9), and the lower part is a core tube (5); The upper portion of the cylinder (2) is provided with a slurry suction pipe (1) for introducing slurry into the core tube (5); The inner wall of the core tube (5) is provided with at least one inner rib (8) for generating a vortex in the core tube (5), and the side wall of the cylinder (2) is provided with at least one spiral slag discharge pipe (4) for introducing the slag slurry at the bottom into the sedimentation bin (9), the lower end of the spiral slag discharge pipe (4) is a lower slag slurry suction port (7) located at the bottom edge of the core tube (5), and the upper end is an upper vortex slag discharge port (10) connected to the sedimentation bin (9).

2. The cone-shaped drill according to claim 1, characterized in that: The direction of the lower slag slurry suction port (7) is the same as the forward rotation direction of the cylinder (2); The spiral slag discharge pipe (4) is spirally distributed along the forward rotation direction of the cylinder (2).

3. The cone-shaped drill according to claim 2, characterized in that: The inner ribs (8) are spirally distributed on the inner wall of the core tube (5), and the spiral direction of the inner ribs (8) is opposite to the spiral direction of the spiral slag discharge tube (4).

4. The cone-shaped drill according to claim 1, characterized in that: A transverse partition is provided in the cylinder (2), and the sedimentation bin (9) and the core tube (5) are separated vertically by the partition; The partition is provided with a pipe hole, and the slurry suction pipe (1) passes through the sedimentation bin (9) from the top of the cylinder (2) and is connected to the pipe hole of the partition.

5. The cone-shaped drill according to claim 2, characterized in that: The upper swirl flow slag discharge port is located on a side wall of the sedimentation bin (9) near the top, and a slag discharge port baffle (11) facing the upper swirl flow slag discharge port is provided on the top of the sedimentation bin (9).

6. The cone-shaped drill according to claim 2, characterized in that: A slag collection and cleaning port (3) that can be opened and closed is provided on the side wall of the sedimentation bin (9) near the bottom, and an overflow opening is provided on the top of the sedimentation bin (9).

7. The cone-shaped drill according to claim 2, characterized in that: The outer side of the spiral slag discharge pipe (4) protrudes from the outer surface of the cylinder (2).

8. The cone-shaped drill according to any one of claims 1 to 7, characterized in that: The number of the spiral slag discharge pipe (4) and the inner ribs (8) is 4-6; The upper swirl discharge port (10) is located at the upper part of the sedimentation bin (9).

9. A construction method for rock drilling cycle slag collection, characterized in that: Drilling with the cone-shaped drill bit according to any one of claims 1 to 8 comprises the following steps: S10, connecting the drill rod to the cone-shaped drill tool; S20, inserting the cone-shaped drill bit into the pile hole to perform drilling operation; S30, the cone-shaped cylindrical drill bit rotates forward to drill into the rock formation, and the cone-shaped cylindrical drill bit is immersed in the mud for cooling; S40, as the cone-shaped drill bit rotates forward, the slurry suction pipe (1) sucks the slurry in the borehole, and under the action of the rotation force, it rushes into the core tube (5), forms a vortex along the inner ribs (8) and guides the slurry to the bottom of the core tube (5); S50, the rock slag generated by the cone crushing the rock layer is mixed with mud to form mud slag. Under the positive rotation force of the cone cylindrical drill bit and the cyclonic force in the core tube (5), the mud slag enters the spiral slag discharge pipe (4) from the lower slag suction port (7), and then enters the sedimentation bin (9) through the upper cyclonic slag discharge port (10); the rock slag is precipitated in the sedimentation bin (9); S60, when the lower slag slurry suction port (7) is blocked, the cone-shaped cylindrical drill bit is reversed to allow the mud and slag in the spiral slag discharge pipe (4) to flow back and flush the blocked lower slag slurry suction port (7).

10. The rock drilling cycle slag collection construction method according to claim 9, characterized in that: The rotation speed of the cone-shaped drill bit is 30-40 r / min.

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