A Guided Hole-Cleaning Drill Bit, Drilling Rig, and Method for Rotary Drilling of Inclined Piles

Abstract

This invention provides a guided hole-cleaning drill bit, a drilling rig, and a method for rotary drilling of inclined piles. The guided hole-cleaning drill bit includes a drill rod with a cutting head mounted at its bottom end; a guide pipe located inside the cutting head and detachably connected to the drill rod; and a flushing pipeline including a first mud pipe and a second mud pipe. The drilling rig includes a vehicle-mounted unit, a guiding device, a lifting device, a drive device, and the guided hole-cleaning drill bit. The method for rotary drilling of inclined piles includes: driving permanent steel pipe piles; constructing a drilling platform using the permanent steel pipe piles; controlling the drilling rig to drill downwards at an angle; cleaning the hole; lowering a reinforcing cage after cleaning; and pouring concrete using a guide pipe. Ultimately, this method achieves better air flotation to carry drill cuttings within a small area, improving the bottom cleaning efficiency of the borehole area; and simultaneously filtering and collecting the drill cuttings through the collection hood, maintaining the quality of circulating mud return and facilitating continuous mud circulation.

Description

Technical Field

[0001] This invention relates to the field of drill bit technology, and in particular to a guide-type hole-cleaning drill bit, a drilling rig, and a method for rotary drilling of inclined piles. Background Technology

[0002] Rotary drilling rigs, as highly efficient hole-forming equipment, have significant advantages in pile foundation construction. After drilling, mud cleaning is required in the borehole area. During drilling, mud, in conjunction with the drill bit, removes the soil and debris generated during drilling. After drilling is completed, higher-density mud is injected to thoroughly clean the bottom of the borehole. Once cleaning is finished and the borehole has reached the preset drilling depth, a reinforcing cage is placed into the borehole, followed by concrete pouring.

[0003] Current drill bit cleaning methods require filling the entire borehole area with higher-density mud. This consumes a large amount of mud and reduces mud utilization and cleaning efficiency during the process of mud removal and recycling. Further research is needed to explore how to reduce the injection space to improve mud utilization and cleaning efficiency during bottom cleaning of the borehole area.

[0004] Therefore, it is necessary to provide a new directional drilling bit, drilling rig, and rotary drilling method for inclined piles to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a guide-type hole-cleaning drill bit, which solves the technical problem in the prior art of how to improve the efficiency of mud utilization and slag removal and hole cleaning using drill bits.

[0006] To solve the above-mentioned technical problems, the present invention provides a guide-type hole-cleaning drill bit, comprising:

[0007] A drill rod, the bottom end of which is fitted with a cutting head;

[0008] A guide tube is located inside the cutting head and is detachably connected to the drill rod.

[0009] The flushing pipeline includes a first mud pipe and a second mud pipe. The first mud pipe and the second mud pipe extend parallel to each other from the drill pipe into the guide pipe. The bottom ends of the first mud pipe and the second mud pipe are connected to the guide pipe. The length of the first mud pipe is greater than the length of the second mud pipe.

[0010] A collection container includes a fixed cover, a collection cover, a filter cover, and a docking plate. The fixed cover covers the top of the collection cover, the filter cover is fixed to the top of the collection cover, and the docking plate is fixed to the bottom of the collection cover. A guide tube passes through the collection cover, the filter cover, and the fixed cover in sequence. The collection cover and the filter cover are slidably connected to the guide tube, the fixed cover is fixedly connected to the guide tube, and the docking plate is in contact with the guide tube.

[0011] An assembly hole is formed in the docking plate and the collecting hood. The assembly hole is located between the filter cover and the guide tube. An adjustment device is used to drive the collecting hood and the docking plate to descend, so as to connect the assembly hole with the bottom end of the second mud pipe.

[0012] Preferably, the flushing pipeline further includes an air pipe, which extends parallel to the drill pipe into the guide pipe, with the bottom end of the air pipe communicating with the guide pipe, and the bottom end of the first mud pipe located above the bottom end of the air pipe.

[0013] Preferably, the guide-type drill bit further includes a rotating cover, which is rotatably installed inside the guide tube via a rotating structure. The rotating cover has a first switch port, a second switch port, and a third switch port. The first switch port is at the same horizontal level as the bottom end of the second mud pipe, the second switch port is at the same horizontal level as the bottom end of the first mud pipe, and the third switch port is at the same horizontal level as the bottom end of the air pipe.

[0014] Preferably, the guide tube has a sliding hole;

[0015] The adjusting device includes a motor, a lead screw, and a sliding shaft. The motor is fixed inside the guide tube, the lead screw is fixed on the drive shaft of the motor, one end of the sliding shaft is threaded onto the lead screw, and the other end of the sliding shaft passes through the sliding hole and is fixedly connected to the collecting cover.

[0016] Preferably, the rotating cover also has a transmission inclined hole, and the sliding shaft passes through the transmission inclined hole and is connected to the rotating cover in a transmission manner.

[0017] Preferably, the guide tube has a movable groove.

[0018] The guide hole-cleaning drill bit also includes a rotary cutting device, which includes a rotating component and a rotary cutting blade. The rotary cutting blade is housed in the movable groove and is rotatably connected to the guide tube through the rotating component.

[0019] Preferably, the rotating component includes a rotating shaft, a first bevel gear, and a second bevel gear. One end of the rotating shaft is fixedly connected to the rotary cutting blade, and the other end of the rotating shaft passes through the guide tube and is fixedly connected to the first bevel gear. The second bevel gear is fixedly disposed at the bottom of the rotating cover and meshes with the first bevel gear.

[0020] Preferably, a sealing baffle is fixedly provided on the top of the sliding shaft component, the top of the sealing baffle is inserted into the guide tube component, and the connection between the two is slidably sealed, and the size of the sealing baffle matches the size of the sliding hole.

[0021] The present invention also provides a drilling rig, including a vehicle-mounted device, a guiding device, a lifting device, a driving device, and the guiding hole-clearing drill bit;

[0022] The guide device is mounted on the vehicle-mounted device, the lifting device is slidably mounted on the guide device, the drive device is fixed at the bottom of the guide device, the drill rod is keyed to the drive device, and the drill rod is mounted on the lifting device through a movable joint.

[0023] This invention also provides a method for rotary drilling of inclined piles, comprising the following steps:

[0024] Step S1: Drive steel pipe piles;

[0025] Step S2: Construct a drilling platform using the steel pipe piles;

[0026] Step S3: Install the drilling rig on the drilling platform and control the drilling rig to drill a hole at an angle downwards;

[0027] Step S4: After drilling is completed, inject mud to clean the hole, and then lower the reinforcing cage.

[0028] Step S5: Concrete is poured using a conduit.

[0029] Compared with related technologies, the guide-type hole-cleaning drill bit provided by the present invention has the following beneficial effects:

[0030] The guide tube is connected to the drill rod only after drilling is completed and before cleaning the hole.

[0031] After the cutting head is inserted into a borehole area, the bottom of the cutting head abuts against the bottom of the borehole area to form a hole clearing space.

[0032] After the collection hood is lowered and opened, a reflux opening is formed between the collection hood and the fixed hood, and the assembly hole connects the second mud pipe and the inside of the filter screen cover;

[0033] The drilling mud is injected into the drilling space through the first mud pipe. The mud mixes with the drilling waste and rises. After being filtered and collected by the filter screen cover, it enters the second mud pipe for circulation back.

[0034] During the mud circulation process, the drilling waste is filtered through the filter screen cover and trapped within the collection range of the collection hood.

[0035] By installing the collection hood within the range of the cutting head, a cleaning space is formed between the cutting head and the bottom of the borehole area after the cutting head penetrates deep into the borehole area. This facilitates mud cleaning within the cleaning space, reducing the mud injection range and eliminating the need to fill the entire borehole area with cleaning mud, thus reducing mud usage and improving mud utilization efficiency. Furthermore, the effect of suspending and removing borehole debris within a small area is better, improving the bottom cleaning efficiency of the borehole area. Simultaneously, the collection hood achieves the filtration and centralized collection of drill cuttings, maintaining the quality of circulating mud return and facilitating continuous mud circulation. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 A three-dimensional view of the guide hole-cleaning drill bit provided by the present invention;

[0038] Figure 2 for Figure 1 The AA section view shown;

[0039] Figure 3 for Figure 2 The enlarged schematic diagram of section B is shown below;

[0040] Figure 4 for Figure 2 Left view of a partial cross-section of the rotating cover shown;

[0041] Figure 5 for Figure 4 The schematic diagram of the rotating cover shown is shown.

[0042] Figure 6 A schematic diagram illustrating the mud delivery principle of the guide-type hole-cleaning drill bit in its installation and use state, as provided by the present invention.

[0043] Figure 7 This is a diagram illustrating the working state of the guide-type hole-cleaning drill bit provided by the present invention, wherein... Figure 7 (a) is a front view of the collection hood in its unfolded state. Figure 7 (b) is Figure 7 (a) A partial enlarged schematic diagram; Figure 7 (c) is Figure 7 (a) An enlarged schematic diagram of another part;

[0044] Figure 8 for Figure 2 The front view of the external structure of the guide tube shown;

[0045] Figure 9 for Figure 2 The enlarged schematic diagram of section C is shown below;

[0046] Figure 10 for Figure 9 The top view of the second bevel gear shown;

[0047] Figure 11 for Figure 8 The diagram shows a front view of the rotary cutter blade in use.

[0048] Figure 12 An assembly diagram of the guide hole cleaning drill bit provided by the present invention;

[0049] Figure 13 for Figure 12 The diagram shows a cross-sectional view of the movable joint.

[0050] Explanation of icon numbers:

[0051] 100. Drilling area; 200. Hole cleaning space; 300. Return opening;

[0052] 1. Drill pipe;

[0053] 2. Cutting head;

[0054] 3. Guide tube; 31. Assembly ring; 301. Sliding hole; 302. Movable groove;

[0055] 4. Flushing pipeline; 41. First mud pipe; 42. Second mud pipe; 43. Air pipe;

[0056] 5. Rotating cover; 501. First switch port; 502. Second switch port; 503. Third switch port; 504. Drive oblique hole;

[0057] 6. Collection container; 61. Fixing cover; 62. Collection cover; 621. Sealing baffle; 63. Filter screen cover; 64. Connecting plate; 640. Assembly hole;

[0058] 7. Adjusting device; 71. Motor; 72. Lead screw; 73. Sliding shaft;

[0059] 8. Rotary cutting device; 81. Rotating component; 82. Rotary cutting blade;

[0060] 811. Shaft; 812. First bevel gear; 813. Second bevel gear;

[0061] 400. Guiding device; 500. Lifting device; 600. Driving device; 700. Movable joint; 701. Fixed plate; 702. Movable plate.

[0062] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0063] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0064] This invention provides a guide-type hole-cleaning drill bit.

[0065] Please refer to the following: Figures 1 to 3 In one embodiment of the present invention, the guided hole-cleaning drill bit includes:

[0066] Drill rod 1, with a cutting head 2 mounted at its bottom end;

[0067] Guide tube 3, which is located inside the cutting head 2 and is detachably connected to the drill rod 1;

[0068] The flushing pipeline 4 includes a first mud pipe 41 and a second mud pipe 42. The first mud pipe 41 and the second mud pipe 42 extend parallel to the drill pipe 1 into the guide pipe 3. The bottom ends of the first mud pipe 41 and the second mud pipe 42 are connected to the guide pipe 3. The length of the first mud pipe 41 is greater than the length of the second mud pipe 42.

[0069] A collection container 6 includes a fixing cover 61, a collection cover 62, a filter cover 63, and a docking plate 64. The fixing cover 61 covers the top of the collection cover 62, the filter cover 63 is fixed to the top of the collection cover 62, and the docking plate 64 is fixed to the bottom of the collection cover 62. A guide tube 3 passes through the collection cover 62, the filter cover 63, and the fixing cover 61 in sequence. The collection cover 62 and the filter cover 63 are slidably connected to the guide tube 3, the fixing cover 61 is fixedly connected to the guide tube 3, and the docking plate 64 is in contact with the guide tube 3.

[0070] An assembly hole 640 is formed in the docking plate 64 and the collecting cover 62. The assembly hole 640 is located between the filter cover 63 and the guide tube 3. An adjusting device 7 is used to drive the collecting cover 62 and the docking plate 64 to descend, so as to drive the assembly hole 640 to connect with the bottom end of the second mud pipe 42.

[0071] Please see Figure 7 In this embodiment, the connection between the bottom end of the first mud pipe 41 and the guide pipe 3 means that the guide pipe 3 has a through hole, and the bottom end of the first mud pipe 41 is connected to the corresponding through hole. The connection principle of the second mud pipe 42 is the same as that of the first mud pipe 41, and will not be described in detail here.

[0072] The guide tube 3 is connected to the drill rod 1 only after drilling is completed and before cleaning the hole.

[0073] Please see Figure 6 After the cutting head 2 is inserted into a borehole area 100, the bottom of the cutting head 2 abuts against the bottom of the borehole area 100 to form a hole clearing space 200.

[0074] After the collection cover 62 is lowered and opened, a return opening 300 is formed between the collection cover 62 and the fixed cover 61, and the assembly hole 640 connects the second mud pipe 42 and the inside of the filter screen cover 63.

[0075] The drilling mud is injected into the drilling space 200 through the first mud pipe 41. The mud mixes with the drilling waste and rises, then is collected by the filter screen cover 63 and enters the second mud pipe 42 for circulation back. Figure 6 The diagram shows the formation of a mud circulation system;

[0076] During the mud circulation process, the drilling waste is filtered through the filter screen cover 63 and trapped within the collection range of the collection cover 62.

[0077] By installing the collection hood 62 within the range of the cutting head 2, after the cutting head 2 penetrates into the borehole area 100, a cleaning space 200 is formed between the cutting head 2 and the bottom of the borehole area 100. This facilitates mud cleaning within the cleaning space 200, reducing the mud injection range and eliminating the need to fill the entire borehole area 100 with cleaning mud, thus reducing mud usage and improving mud utilization efficiency. Furthermore, the effect of suspending and removing drilling waste in a small area is better, improving the bottom cleaning efficiency of the borehole area 100. Simultaneously, the collection hood 62 achieves the filtration and centralized collection of drilling waste, maintaining the return quality of circulating mud and facilitating continuous mud circulation.

[0078] After the borehole cleaning is completed, the first mud pipe 41 can be switched from the mud discharge state to the mud extraction state. The circulating mud within the borehole cleaning space 200 is extracted using the first mud pipe 41. After extraction, the first mud pipe 41 and the second mud pipe 42 are closed. The guide pipe 3 and the collection hood 62 are then lifted upwards and removed from the borehole area 100 using the drill pipe 1 and the cutting head 2. The drill cuttings collected by the collection hood 62 are then centrally disposed of and transported. This avoids the pollution around the borehole caused by mud discharge and significantly improves the efficiency of borehole cleaning.

[0079] Please refer to it again. Figure 2 The top of the guide tube 3 can be threaded onto the bottom end of the drill rod 1 via an assembly ring 31, and the top of the guide tube 3 is connected to the assembly ring 31 via a threaded structure.

[0080] The guide tube 3 is conveniently assembled with the drill rod 1 via the assembly ring 31, and the guide tube 3 can be removed from the drill rod 1 during drilling.

[0081] Please refer to the following: Figure 2 and Figure 3 The flushing pipeline 4 also includes an air pipe 43, which extends parallel to the drill rod 1 into the guide pipe 3. The bottom end of the air pipe 43 is connected to the guide pipe 3, and the bottom end of the first mud pipe 41 is located above the bottom end of the air pipe 43.

[0082] The conduction principle of the air pipe 43 is the same as that of the first mud pipe 41, and will not be described in detail here.

[0083] While the mud is circulating, compressed air is injected from the bottom of the hole cleaning space 200 through the air pipe 43, so that the mud and gas form a mixture, which can effectively carry larger drill cuttings to float to the range of the collection hood 62, thus speeding up the hole cleaning and collection efficiency. The purified mud can be recycled for drilling operations, which not only reduces the amount of mud discharged and saves material costs, but also greatly improves the cuttings removal efficiency.

[0084] During the hole cleaning process of the cutting head 2, the hole cleaning height can be determined according to the depth of the cutting head 2 descending relative to the ground. Thus, the hole depth can be measured by the descent depth of the cutting head 2 during hole cleaning, thereby realizing the measurement and positioning of the hole depth.

[0085] In this embodiment, the collection cover 62 has two usage states:

[0086] Please see Figure 2 In the retracted state, the collection cover 62 is completely housed within the fixed cover 61, and the docking plate 64 covers the input end of the second mud pipe 42, facilitating the storage of the equipment;

[0087] Please see Figure 7 In the unfolded state, the collecting cover 62 moves down and opens relative to the fixed cover 61, forming a return opening 300 between the collecting cover 62 and the fixed cover 61. The assembly hole 640 of the docking plate 64 is connected to the input end of the second mud pipe 42, facilitating the entry and return of circulating mud.

[0088] When the collection hood 62 is in the unfolded state, one end of the assembly hole 640 is located between the filter screen cover 63 and the guide tube 3, which facilitates the slurry entering the collection hood 62 to be filtered first, and then returned through the assembly hole 640 and the second slurry pipe 42.

[0089] Please refer to the following: Figure 2 , Figure 3 and Figure 4 The guide hole cleaning drill bit also includes a rotating cover 5, which is rotatably installed inside the guide tube 3 via a rotating structure. The rotating cover 5 has a first switch port 501, a second switch port 502 and a third switch port 503. The first switch port 501 is at the same horizontal level as the bottom end of the second mud pipe 42, the second switch port 502 is at the same horizontal level as the bottom end of the first mud pipe 41, and the third switch port 503 is at the same horizontal level as the bottom end of the air pipe 43.

[0090] As mentioned above, the guide tube 3 is provided with a through hole.

[0091] Please see Figure 7 (b) and Figure 7 (c) When the rotating cover 5 is closed, the rotating cover 5 simultaneously blocks and closes the first mud pipe 41, the second mud pipe 42, the air pipe 43 and the corresponding through hole;

[0092] When the rotating cover 5 is opened, the rotating cover 5 simultaneously enables the first mud pipe 41, the second mud pipe 42 and the air pipe 43 to be connected to the corresponding through holes.

[0093] The rotating cover 5 is rotatably installed inside the guide pipe 3. When the rotating cover 5 is closed, the first mud pipe 41, the second mud pipe 42 and the air pipe 43 slide and seal with the inner surface of the rotating cover 5, so that the rotating cover 5 can be stably rotated and adjusted relative to the output end of the first mud pipe 41, the second mud pipe 42 and the air pipe 43.

[0094] In this embodiment, the rotating cover 5 includes two usage states:

[0095] In the closed state, the rotating cover 5 sequentially blocks the outlets of the first mud pipe 41, the second mud pipe 42, and the air pipe 43. The first switch port 501 is staggered with the second mud pipe 42, the second switch port 502 is staggered with the first mud pipe 41, and the third switch port 503 is staggered with the air pipe 43, making it convenient to close all pipe outlets.

[0096] In the open state, the first switch port 501 is connected to the second mud pipe 42, the second switch port 502 is connected to the first mud pipe 41, and the third switch port 503 is connected to the air pipe 43, making it convenient to open all the pipe outlets.

[0097] In an optional embodiment of this example, the adjusting device 7 can be an independent hydraulic telescopic cylinder. The two ends of the adjusting device 7 are respectively fixedly connected to the fixed cover 61 and the collecting cover 62. The adjusting device 7 directly drives the collecting cover 62 to adjust its height relative to the fixed cover 61 through the hydraulic telescopic cylinder.

[0098] In another optional implementation of this embodiment, please refer to the following: Figure 2 and Figure 3 The guide tube 3 is provided with a sliding hole 301;

[0099] The adjusting device 7 includes a motor 71, a lead screw 72, and a sliding shaft 73. The motor 71 is fixed inside the guide tube 3, the lead screw 72 is fixed on the drive shaft of the motor 71, one end of the sliding shaft 73 is threaded onto the lead screw 72, and the other end of the sliding shaft 73 passes through the sliding hole 301 and is fixedly connected to the collecting cover 62.

[0100] Please refer to the following: Figure 3 and Figure 7 When the lead screw 72 rotates counterclockwise (view from above), the sliding shaft 73 drives the collecting cover 62 to move downward, thereby providing power for the downward movement of the collecting cover 62 relative to the fixed cover 61, so that the collecting cover 62 can switch from the retracted state to the unfolded state.

[0101] When the lead screw 72 rotates clockwise (viewed from above), the sliding shaft 73 drives the collecting cover 62 to move upward, thereby providing power for the upward movement of the collecting cover 62 relative to the fixed cover 61, so that the collecting cover 62 can switch from the unfolded state to the retracted state.

[0102] The motor 71 can be used to drive the collection cover 62 to adjust its height, making it easy to switch and adjust the usage state of the collection cover 62.

[0103] In an optional embodiment of this example, the rotation structure of the rotating cover 5 is an independent rotary motor, which is installed at the bottom of the guide tube 3, and the rotation shaft of the rotary motor is fixedly connected to the bottom of the rotating cover 5. The rotary motor provides power for the individual rotation control of the rotating cover 5.

[0104] In another optional implementation of this embodiment, please refer to the following: Figure 4 , Figure 5 and Figure 7 (b) The rotating cover 5 is also provided with a transmission inclined hole 504, and the sliding shaft 73 passes through the transmission inclined hole 504 and is connected to the rotating cover 5 in a transmission manner.

[0105] That is, the adjusting device 7 and the transmission inclined hole 504 are the rotating structure.

[0106] It is understood that when the collection cover 62 is retracted, the rotating cover 5 is in a closed state; when the collection cover 62 is opened, the rotating cover 5 is in an open state.

[0107] Specifically, the transmission inclined hole 504 is inclined around the rotating cover 5, and the rotating cover 5 is in a closed state when the sliding shaft 73 is located at the top of the transmission inclined hole 504;

[0108] When the sliding shaft 73 moves from top to bottom, the sliding shaft 73 moves along the top of the transmission inclined hole 504 toward the bottom of the transmission inclined hole 504. The sliding shaft 73 drives the rotating cover 5 to adaptively rotate counterclockwise (view angle) through the structure of the inclined surface of the transmission inclined hole 504.

[0109] When the sliding shaft 73 moves to the bottom of the transmission inclined hole 504, the rotating cover 5 completely switches from the closed state to the open state.

[0110] Similarly, when the sliding shaft 73 moves from bottom to top, the sliding shaft 73 synchronously drives the rotating cover 5 to adaptively rotate clockwise (view angle) through the transmission inclined hole 504.

[0111] By connecting the sliding shaft 73 through the transmission inclined hole 504 and then to the collection cover 62, the sliding shaft 73 is used to drive the collection cover 62 to move downward and unfold, and also to drive the rotating cover 5 to rotate and open synchronously during the downward movement of the sliding shaft 73; this facilitates the automatic opening of the rotating cover 5 while the collection cover 62 unfolds.

[0112] During the upward movement of the sliding shaft 73, it is used to drive the collection cover 62 to move upward and retract, and also to drive the rotating cover 5 to rotate and close synchronously, so that the collection cover 62 can be retracted while the rotating cover 5 is automatically closed.

[0113] Driven by the motor 71, the collecting cover 62 is switched from the retracted state to the unfolded state, and the rotating cover 5 is switched from the closed state to the open state. This allows the collecting cover 62 to be unfolded for use while controlling the rotating cover 5 to open automatically.

[0114] Please refer to the following: Figure 8 and Figure 10 The guide tube 3 has a movable groove 302.

[0115] The guide hole-cleaning drill bit also includes a rotary cutting device 8, which includes a rotating component 81 and a rotary cutting blade 82. The rotary cutting blade 82 is housed in the movable groove 302 and is rotatably connected to the guide tube 3 through the rotating component 81.

[0116] During the inclined drilling process of the cutting head 2, it is difficult to flatten the bottom plane of the drilling well area 100; the bottom of the drilling well area 100 may have a bulge on one side, affecting the flatness of the bottom. Therefore, flattening and correcting the inside of the drilling well area 100 helps the subsequent construction, especially the smooth lowering of the reinforcing cage to the preset elevation.

[0117] In this embodiment, the rotation range of the rotary cutting blade 82 corresponds to the inner wall range of the cutting head 2, and the rotary cutting blade 82 will not come into contact with the cutting head 2 during rotation, thus ensuring the stability of the rotation adjustment of the rotary cutting blade 82.

[0118] In this embodiment, the rotary cutting blade 82 has two usage states:

[0119] Please see Figure 8 In the folded state, all the rotary cutting blades 82 are stored within the range of the movable slot 302, which facilitates the folding and storage of the equipment and reduces the space occupied by the guide tube 3 when the rotary cutting blades 82 are not needed.

[0120] Please see Figure 11 In use, the rotary cutting blade 82 is detached from the movable groove 302 and is perpendicular to the guide tube 3, which facilitates the opening and use of the rotary cutting blade 82. When in use, the rotation of the drill rod 1 itself is used as a power source to drive the guide tube 3 and the rotary cutting blade 82 to rotate synchronously, which is used to scrape the bottom plane of the drilling well area 100, so that the bottom surface of the drilling well area 100 is flat after the hole is cleaned.

[0121] When it is necessary to clean the bottom of the inner wall of the borehole area 100, the rotary cutting blade 82 is driven to rotate by the rotating component 81. The rotary cutting blade 82 switches from the folded state to the use state, and the rotation range of the rotary cutting blade 82 is aligned with the bottom of the inner wall of the borehole area 100, which can achieve the scraping treatment of the bottom of the borehole area 100 after inclined drilling. At the same time as scraping, the mud and drilling cuttings mixture is transported, filtered and collected, so that the bottom of the borehole area 100 is flat after the hole cleaning treatment, which is convenient for subsequent construction.

[0122] In an optional embodiment of this example, the rotating component 81 can be an independent motor structure. The motor structure of the rotating component 81 is fixed inside the guide tube 3. The rotation shaft of the rotating component 81 passes through the guide tube 3 and is connected to the rotary cutting blade 82, so that the rotary cutting blade 82 can be directly driven to rotate and adjust through the motor structure. The rotary cutting blade 82 can be adjusted independently.

[0123] In another optional implementation of this embodiment, please refer to the following: Figure 9 and Figure 10 The rotating component 81 includes a rotating shaft 811, a first bevel gear 812, and a second bevel gear 813. One end of the rotating shaft 811 is fixedly connected to the rotary cutting blade 82, and the other end of the rotating shaft 811 passes through the guide tube 3 and is fixedly connected to the first bevel gear 812. The second bevel gear 813 is fixedly disposed at the bottom of the rotating cover 5 and meshes with the first bevel gear 812.

[0124] When the collection cover 62 is opened, the rotating cover 5 opens simultaneously, and the rotary cutting blade 82 unfolds simultaneously.

[0125] In this embodiment, the rotary cutting blade 82 is connected to the rotating cover 5 via a rotating shaft 811, the first bevel gear 812, and the second bevel gear 813.

[0126] During the process of switching the rotating cover 5 from the closed state to the open state (e.g.) Figure 10 (From a perspective of counterclockwise rotation), the rotating cover 5 synchronously drives the second bevel gear 813 to rotate counterclockwise (as shown in the image). Figure 10 From a certain perspective, the second bevel gear 813 drives the first bevel gear 812 to rotate clockwise (e.g., ...). Figure 8 From the perspective of the first bevel gear 812, the first bevel gear 812 drives the rotary cutting blade 82 to rotate clockwise through the rotating shaft 811, so that the rotary cutting blade 82 switches from the folded state to the working state, so that the rotary cutting blade 82 can be opened while cleaning the hole with mud, and the bottom of the borehole 100 can be scraped flat.

[0127] Similarly, during the process of the rotating cover 5 switching from the open state to the closed state, the rotary cutting blade 82 switches from the use state to the folded state, so as to facilitate the synchronous folding of the equipment after the hole cleaning is completed;

[0128] Driven by the motor 71, the expansion of the collection cover 62, the opening of the rotating cover 5, and the state switching of the rotary cutting blade 82 are realized simultaneously. While facilitating mud injection, the rotational power of the drill rod 1 drives the rotary cutting blade 82 to scrape the bottom of the hole. While scraping, the mud and drill cuttings are floated to the surface through mud and air flotation. After floating, they enter the collection cover 62 for filtration, collection, and mud circulation.

[0129] Please refer to the following: Figure 3 and Figure 7 (b) A sealing baffle 621 is fixedly provided on the top of the sliding shaft 73. The top of the sealing baffle 621 is inserted into the guide tube 3, and the connection between the two is slidably sealed. The size of the sealing baffle 621 matches the size of the sliding hole 301.

[0130] When the collection cover 62 is in the retracted state, the sliding shaft 73 can drive the sealing baffle 621 to be stably stored on the guide tube 3 to maintain the stability of the lifting and lowering adjustment of the collection cover 62.

[0131] When the collection cover 62 is in the unfolded state, the sliding shaft 73 drives the sealing baffle 621 to unfold synchronously. After unfolding, the top of the sealing baffle 621 remains connected to the guide tube 3, and the sealing baffle 621 covers the area of ​​the sliding hole 301 to prevent mud from entering the guide tube 3.

[0132] In a preferred embodiment, the fixing cover 61 is detachably mounted on the guide tube 3, and the filter cover 63 is detachably mounted on the collection cover 62.

[0133] After the guide tube 3 and the assembly ring 31 are disassembled, the fixing cover 61 can be easily removed from the guide tube 3.

[0134] After the fixing cover 61 and the guide tube 3 are removed, the filter cover 63 is exposed from above, and the filter cover 63 can be easily disassembled, maintained or replaced from the collection cover 62.

[0135] Specifically, the fixing cover 61 and the guide tube 3 are detachably connected by screws; the filter cover 63 and the collection cover 62 are detachably connected by screws.

[0136] As a preferred embodiment, please refer to [the relevant documentation / reference]. Figure 12 and Figure 13 The drill rod 1 is provided with a movable joint 700 at its top; the movable joint 700 includes a fixed plate 701 and a movable plate 702, the movable plate 702 being rotatably installed inside the fixed plate 701; the fixed plate 701 is fixedly installed on the lifting device 500 of the drilling rig, and the movable plate 702 is fixedly installed on the top of the drill rod 1.

[0137] The fixed disk 701 and the movable disk 702 form two annular chambers and one cylindrical chamber, which are used for mud input, mud output and air supply, respectively.

[0138] The fixed disk 701 does not rotate synchronously with the drill pipe 1. The fixed disk 701 and the movable disk 702 are rotatably sealed. Two annular chambers can be connected to an external mud circulation system, and one cylindrical chamber can be connected to an air supply system.

[0139] The movable disc 702 can be connected to the flushing pipe 4. Specifically, the two annular chambers can be connected to the first mud pipe 41 and the second mud pipe 42, and the cylindrical chamber can be connected to the air pipe 43.

[0140] The movable disc 702 rotates synchronously with the drill rod 1, ensuring that the drill rod 1 rotates while maintaining the connection between pipelines; so as to maintain the stability of mud input, output and air supply when the drill rod 1 is rotated and adjusted.

[0141] The working principle of the guide-type hole-cleaning drill bit provided in this embodiment is as follows:

[0142] like Figure 2 , Figure 3 and Figure 8 As shown, it can be defined that in the initial state, the cutting head 2 is inserted to the bottom of the borehole area 100, the collecting cover 62 is in the retracted state, the rotating cover 5 is in the closed state, and the rotary cutting blade 82 is in the folded state.

[0143] Please refer to the following: Figure 2 and Figure 7 of (a) Figure 3 and Figure 7 (b) and Figure 8 and Figure 11 Before cleaning the hole, start the motor 71. The motor 71 drives the sliding shaft 73 to move down through the lead screw 72. The sliding shaft 73 drives the collection cover 62 to move down, so that the collection cover 62 switches from the retracted state to the open state. At the same time as the collection cover 62 moves down, it also drives the filter screen cover 63 to move down, which facilitates the filtration of subsequent circulating mud.

[0144] As the collection cover 62 moves downward, the docking plate 64 is also moved downward. The assembly hole 640 on the docking plate 64 connects the collection cover 62 and the second mud pipe 42, which facilitates the opening and use of the collection cover 62 and the filtration before returning the mud.

[0145] As the collection cover 62 moves downward, the sliding shaft 73 drives the rotating cover 5 to rotate adaptively through the transmission inclined hole 504, so that the rotating cover 5 is adjusted from the closed state to the open state, which facilitates grouting, grout return and air supply.

[0146] While the rotating cover 5 is rotating, the rotating cover 5 drives the first bevel gear 812 to rotate through the second bevel gear 813. The first bevel gear 812 drives the rotary cutting blade 82 to rotate through the rotating shaft 811, so that the rotary cutting blade 82 is adjusted from the folded state to the use state, which is convenient for scraping the bottom of the borehole area 100.

[0147] like Figure 7 and Figure 11 As shown, the collection cover 62 is in the unfolded state, the rotating cover 5 is in the open state, and the rotary cutter 82 is in the use state.

[0148] Driven by the motor 71, the collection cover 62 is expanded, the rotating cover 5 is opened, and the state switching of the rotary cutting blade 82 is achieved simultaneously. This facilitates mud injection while the rotational power of the drill rod 1 drives the rotary cutting blade 82 to scrape the bottom of the hole.

[0149] The present invention also provides a drilling rig.

[0150] Please see Figure 12 The drilling rig includes a vehicle-mounted unit, a guiding device 400, a lifting device 500, a driving device 600, and the guiding hole-cleaning drill bit;

[0151] The guide device 400 is mounted on the vehicle-mounted device, the lifting device 500 is slidably mounted on the guide device 400, the drive device 600 is fixedly mounted on the bottom of the guide device 400, the drill rod 1 is keyed to the drive device 600, and the drill rod 1 is mounted on the lifting device 500 through a movable joint 700.

[0152] The lifting device 500 is used to drive the drive device 600 and the guide hole-cleaning drill bit to lift and adjust as a whole; preferably, the lifting device 500 is folded and installed on the vehicle-mounted device through a hydraulic system; the drive device 600 is used to drive the drill rod 1 and the cutting head 2 to rotate in a drilling manner.

[0153] This drilling rig structure can be used for both vertical pile construction and inclined pile construction.

[0154] The specific structure of the guide hole cleaning drill bit is as described in the above embodiments. Since the drilling rig adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0155] The present invention also provides a method for rotary drilling of inclined piles.

[0156] The method for constructing inclined piles by rotary drilling specifically includes the following steps:

[0157] Step S1: Drive steel pipe piles;

[0158] Step S2: Construct a drilling platform using the steel pipe piles;

[0159] Step S3: Install the drilling rig on the drilling platform and control the drilling rig to drill a hole at an angle downwards;

[0160] Step S4: After drilling is completed, mud is injected to clean the hole, and then the steel cage is lowered.

[0161] Step S5: Concrete is poured using a conduit.

[0162] The rotary drilling method for inclined piles can be equipped with specialized drilling rigs. It utilizes rotary drilling for guided construction of inclined piles, employing a "pull-out antenna" type drill rod directly connected to the drill bit. Through a precise hydraulic control system, the inclination of the guide frame can be quickly adjusted according to the designed inclined pile angle during construction, ensuring the rotary drill maintains an accurate inclined trajectory throughout the drilling process and effectively preventing borehole deviation. Furthermore, it increases the drilling rig's hoisting and slewing unloading rates, significantly improving borehole efficiency. This method can shorten the construction cycle, reduce construction costs, and improve the bearing capacity and durability of inclined pile foundations, providing a highly reliable and efficient technical solution for inclined pile construction in ports, bridges, and marine engineering fields, with broad application prospects and significant economic benefits.

[0163] The specific structure of the guide hole cleaning drill bit is as described in the above embodiments. Since the inclined pile rotary drilling construction method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0164] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A guide-type hole-cleaning drill bit, characterized in that, include: A drill rod, the bottom end of which is fitted with a cutting head, the cutting head being in the shape of an inverted barrel; A guide tube is located inside the cutting head and is detachably connected to the drill rod; the guide tube is connected to the drill rod only after drilling is completed and before cleaning the hole. The flushing pipeline includes a first mud pipe and a second mud pipe. The first mud pipe and the second mud pipe extend parallel to each other from the drill pipe into the guide pipe. The bottom ends of the first mud pipe and the second mud pipe are connected to the guide pipe. The length of the first mud pipe is greater than the length of the second mud pipe. A collection container includes a fixed cover, a collection cover, a filter cover, and a docking plate. The fixed cover covers the top of the collection cover, the filter cover is fixed to the top of the collection cover, and the docking plate is fixed to the bottom of the collection cover. A guide tube passes through the collection cover, the filter cover, and the fixed cover in sequence. The collection cover and the filter cover are slidably connected to the guide tube, the fixed cover is fixedly connected to the guide tube, and the docking plate is in contact with the guide tube. An assembly hole is formed in the docking plate and the collecting hood. The assembly hole is located between the filter screen cover and the guide tube. An adjustment device is used to drive the collecting hood and the docking plate to descend so that the assembly hole can be connected to the bottom end of the second mud pipe. The collection cover has two usage states: In the retracted state, the collection cover is completely housed within the fixed cover area, and the docking plate covers the input end of the second mud pipe to facilitate the storage of the equipment; In the unfolded state, the collecting cover moves down and opens relative to the fixed cover, forming a return opening between the collecting cover and the fixed cover. The assembly hole of the docking plate is connected to the input end of the second mud pipe to facilitate the entry and return of circulating mud. When the collection hood is in the unfolded state, one end of the assembly hole is located between the filter screen cover and the guide tube, which facilitates the slurry entering the collection hood to be filtered first, and then returned through the assembly hole and the second slurry pipe. After the cutting head penetrates deep into the borehole area, a cleaning space is formed between the cutting head and the bottom of the borehole area to facilitate mud cleaning within the cleaning space and reduce the mud injection range. The guide tube is provided with a sliding hole; The adjusting device includes a motor, a lead screw, and a sliding shaft. The motor is fixed inside the guide tube, the lead screw is fixed on the drive shaft of the motor, one end of the sliding shaft is threaded onto the lead screw, and the other end of the sliding shaft passes through the sliding hole and is fixedly connected to the collecting cover. A sealing baffle is fixedly provided on the top of the sliding shaft component. The top of the sealing baffle is inserted into the guide tube component, and the connection between the two is slidably sealed. The size of the sealing baffle matches the size of the sliding hole. When the collection cover is in the retracted state, the sliding shaft can drive the sealing baffle to be stably housed on the guide tube, so as to maintain the stability of the lifting and lowering adjustment of the collection cover; When the collection cover is in the unfolded state, the sliding shaft drives the sealing baffle to unfold synchronously. After unfolding, the top of the sealing baffle remains connected to the guide tube, and the sealing baffle covers the area of ​​the sliding hole to prevent mud from entering the guide tube. The guide-type hole-cleaning drill bit also includes a rotating cover, which is rotatably installed inside the guide tube via a rotating structure. The rotating cover also has a transmission inclined hole, and the sliding shaft passes through the transmission inclined hole and is connected to the rotating cover in a transmission manner. A movable groove is provided on the guide tube; The guide hole-cleaning drill bit also includes a rotary cutting device, which includes a rotating component and a rotary cutting blade. The rotary cutting blade is housed in the movable groove and is rotatably connected to the guide tube through the rotating component. The sliding shaft drives the collecting cover to move downward, switching the collecting cover from a retracted state to an open state. While the collecting cover moves downward, the sliding shaft drives the rotating cover to rotate adaptively through the transmission oblique hole, adjusting the rotating cover from a closed state to an open state. While the rotating cover rotates, the rotary cutting blade is adjusted from a folded state to a usable state.

2. The guide-type hole-cleaning drill bit according to claim 1, characterized in that, The flushing pipeline also includes an air pipe, which extends parallel to the drill pipe into the guide pipe. The bottom end of the air pipe is connected to the guide pipe, and the bottom end of the first mud pipe is located above the bottom end of the air pipe.

3. The guide-type hole-cleaning drill bit according to claim 2, characterized in that, The rotating cover has a first switch port, a second switch port, and a third switch port. The first switch port is at the same horizontal level as the bottom end of the second mud pipe, the second switch port is at the same horizontal level as the bottom end of the first mud pipe, and the third switch port is at the same horizontal level as the bottom end of the air pipe.

4. The guide-type hole-cleaning drill bit according to claim 1, characterized in that, The rotating component includes a rotating shaft, a first bevel gear, and a second bevel gear. One end of the rotating shaft is fixedly connected to the rotary cutting blade, and the other end of the rotating shaft passes through the guide tube and is fixedly connected to the first bevel gear. The second bevel gear is fixedly disposed at the bottom of the rotating cover and meshes with the first bevel gear.

5. A drilling rig, characterized in that, Includes vehicle-mounted equipment, guiding device, lifting device, driving device, and the guided hole-clearing drill bit as described in any one of claims 1-4; The guide device is mounted on the vehicle-mounted device, the lifting device is slidably mounted on the guide device, the drive device is fixed at the bottom of the guide device, the drill rod is keyed to the drive device, and the drill rod is mounted on the lifting device through a movable joint.

6. A method for constructing inclined piles by rotary drilling, characterized in that, Includes the following steps: Step S1: Drive steel pipe piles; Step S2: Construct a drilling platform using the steel pipe piles; Step S3: Install the drilling rig as described in claim 5 on the drilling platform and control the drilling rig to drill a hole at an angle downwards; Step S4: After drilling is completed, inject mud to clean the hole, and then lower the reinforcing cage. Step S5: Concrete is poured using a conduit.

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