Tower-shaped guide hole-cleaning bit device suitable for treating deposits in borehole inclination tubes

Abstract

The utility model discloses a tower shape guide sweeps hole drill bit device suitable for handling the silting up in borehole inclinometer pipe, relates to composite sheet drill bit technical field, it includes from right to left in proper order screw thread connection's front drill bit, middle layer drill bit, rear layer drill bit, stabilizing pipe and cap head, the inside interval of front drill bit right -hand tip is provided with a plurality of first front cutting edge, and the recessed hole is provided to the left end in the inside of first front cutting edge of front drill bit, and the left end of front drill bit is first hollow structure, the outside interval of middle layer drill bit right -hand tip is provided with a plurality of second front cutting edge, and the right -hand tip of middle layer drill bit is provided with first protective cutting edge outside surface, the outside interval of rear layer drill bit right -hand tip is provided with a plurality of third front cutting edge, and the right -hand tip of rear layer drill bit is provided with second protective cutting edge outside surface, the first front cutting edge of the utility model is welded in the inside of front drill bit right -hand tip, and front drill bit does not have the blade, avoids cutting the inclinometer pipe in the inclinometer pipe, guarantees the pilot effect, and the combination of stabilizing pipe and cap head guarantees stability.

Description

Technical Field

[0001] This utility model relates to the field of composite drill bit technology, and more specifically, it is a tower-shaped guide sweeping drill bit device suitable for treating the silt inside the borehole inclination tube. Background Technology

[0002] During the installation of borehole inclinometers, especially deep-hole inclinometers, problems such as poor sealing of the inclinometer joints and weak pipe quality can easily lead to cement slurry seeping into the pipe and accumulating and solidifying during the grouting and backfilling process. To ensure the normal use of the inclinometer, it is necessary to clean the sludge inside the pipe (such as mud and grouting pipe).

[0003] Currently, drilling rigs are commonly used for borehole cleaning operations. The conventional drill bits used primarily include flat-bottomed, multi-step, conical, and umbrella-shaped types. However, with the passage of time and the influence of the working environment, conventional drill bits have revealed many drawbacks. On the one hand, conventional flat-bottomed drill bits exhibit significant lateral runout when cutting plastic components inside inclinometer tubes, making it easy for the borehole to deviate from its original trajectory. This not only significantly increases the difficulty of drilling but also raises repair costs considerably. On the other hand, drilling plastic inclinometer tubes produces coarse, ribbon-like drill chips, and conventional drill bits have insufficient chip removal capabilities, resulting in the drill chips... Large amounts of slurry buildup inside the borehole not only affect drilling speed but can also lead to drilling accidents in severe cases. Meanwhile, the injection of pure cement slurry into the borehole can cause drill bit jamming, further hindering the operation. Furthermore, the installation of the borehole inclination gauge is often misaligned, making it difficult for conventional drilling tools to adapt to the guide clearance, significantly reducing the accuracy of the operation. These problems become even more pronounced under complex geological conditions or variable borehole environments, severely impacting the efficiency and quality of borehole inclination gauge cleaning operations and becoming a major factor restricting the long-term stable operation of borehole inclination gauge maintenance.

[0004] Therefore, it is necessary to develop a tower-shaped guide drilling bit device that can adapt to complex drilling environments and efficiently clean the silt inside the borehole inclination tube. Utility Model Content

[0005] The purpose of this invention is to overcome the problems faced by conventional drill bits in the above-mentioned background art when dealing with silt in borehole survey tubes, such as borehole deviation, drill cuttings accumulation, drill bit clogging, and survey tube installation misalignment, and to provide a tower-shaped guide sweeping drill bit device suitable for dealing with silt in borehole survey tubes.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: a tower-shaped guide drilling bit device suitable for treating silt inside borehole inclinometer tubes, characterized in that it includes a front drill bit, a middle layer drill bit, a rear layer drill bit, a stabilizing tube, and a cap connected in sequence from right to left;

[0007] The front drill bit has multiple first front cutting edges spaced apart on the inner side of the right end. The front drill bit has a concave hole on the inner side of the first front cutting edges towards the left end. The left end of the front drill bit is a first hollow structure.

[0008] A first water channel is provided between adjacent first front cutting edges, and an intermediate cutting edge is provided in the concave hole. The first hollow structure is connected to the concave hole through a first water passage.

[0009] The middle layer drill bit has multiple second front cutting edges spaced apart on the outer side of the right end, and a first protective cutting edge is provided on the outer surface of the right end of the middle layer drill bit.

[0010] A second water passage is provided between adjacent second front cutting edges;

[0011] The outer side of the right end of the rear layer drill bit is provided with multiple third front cutting edges at intervals, and the outer surface of the right end of the rear layer drill bit is provided with a second protective cutting edge.

[0012] A third water channel is provided between adjacent third front cutting edges.

[0013] In the above technical solution, the diameter of the right end of the front drill bit is smaller than the diameter of the right end of the middle drill bit, and the diameter of the right end of the middle drill bit is smaller than the diameter of the right end of the rear drill bit.

[0014] In the above technical solution, the outer surface of the left end of the front drill bit is provided with a plurality of side water passage holes that communicate with the first hollow structure at intervals; the side water passage holes are located on the right side of the second front cutting edge, and the side water passage holes correspond one-to-one with the second front cutting edge.

[0015] In the above technical solution, the first water channel includes a first end face water inlet and a first outer water groove. The first end face water inlet is recessed from the right end of the front drill bit to the left end, and the first outer water groove is recessed from the outer surface of the right end of the front drill bit to the inner surface.

[0016] In the above technical solution, the second water channel includes an end face chip discharge port and a first outer spiral water groove. The end face chip discharge port is recessed from the right end of the middle layer drill bit to the left end. The first outer spiral water groove is disposed on the outer surface of the right end of the middle layer drill bit and communicates with the end face chip discharge port.

[0017] In the above technical solution, the angle between the third front cutting edge and the axis of the rear drill bit is 40°-60°.

[0018] In the above technical solution, the left end of the rear drill bit is a second hollow structure, and the third water channel includes a second water passage, a second end face water outlet, and a second outer spiral water groove. The second water passage is connected to the second hollow structure, the second end face water outlet is recessed from the right end of the rear drill bit to the left end, and the second outer spiral water groove is set on the outer surface of the right end of the rear drill bit and is connected to the second end face water outlet.

[0019] In the above technical solution, an external water groove is provided on the outer surface of the left end of the cap.

[0020] In the above technical solution, the width of the first outer spiral water trough is 15-25mm and the depth is 5-10mm; the width of the second outer spiral water trough is 20-40mm and the depth is 8-20mm; and the width of the outer water trough is 30-50mm and the depth is 10-20mm.

[0021] In the above technical solution, the outer surface of the left end of the front drill bit is provided with a first connecting thread, the inner wall of the right end of the middle drill bit is provided with a second connecting thread and the outer surface of the left end is provided with a third connecting thread, the inner wall of the right end of the rear drill bit is provided with a fourth connecting thread and the outer surface of the left end is provided with a fifth connecting thread, the inner walls of both ends of the stabilizing tube are provided with internal threads, and the outer surface of the right end of the cap is provided with a sixth connecting thread; the first connecting thread matches the second connecting thread, the third connecting thread matches the fourth connecting thread, the fifth connecting thread matches the internal thread of the right end of the stabilizing tube, and the sixth connecting thread matches the internal thread of the left end of the stabilizing tube.

[0022] Compared with the prior art, this utility model has the following advantages:

[0023] 1) This utility model addresses the challenge of cleaning silt deposits inside borehole inclinometer tubes by designing a tower-shaped guided drilling bit device. Through a unique tower-shaped composite drill bit structure, this utility model precisely guides the drill bit along its original trajectory during drilling, preventing borehole deviation due to drill bit bouncing. Furthermore, it optimizes the cuttings discharge channel, achieving efficient removal of cuttings from the plastic inclinometer tube. This utility model utilizes high-strength, wear-resistant special composite materials, ensuring excellent durability and stability even in complex and harsh drilling environments such as cement slurry drilling and cuttings accumulation. Through repeated testing and continuous optimization in multiple actual borehole inclinometer tube cleaning projects, the structure and parameters of this utility model were specifically adjusted, ultimately resulting in a drill bit device with an ingenious design, outstanding cleaning effect, and convenient installation, providing an innovative solution for cleaning silt deposits inside borehole inclinometer tubes.

[0024] 2) Guiding and stabilizing function: The first front cutting edge of this utility model is welded to the inner side of the right end of the front drill bit. The front drill bit has no external cutting edge, which avoids cutting the inclinometer tube inside the inclinometer tube and ensures the guiding function; the combination of the stabilizing tube and the cap ensures stability.

[0025] 3) Cutting of plastic materials: The second front cutting edge is set on the outside of the right end of the middle layer drill bit. The middle layer drill bit is a flat-bottomed drill bit, which is convenient for cutting plastic inclinometer tubes.

[0026] 4) Enhanced diameter protection: The intermediate drill bit is equipped with a first protective cutting edge, and the rear drill bit is equipped with a second protective cutting edge, which reduces the wear of the outer diameter of the intermediate drill bit and the rear drill bit. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the front drill bit.

[0029] Figure 3 This is a right-side view of the front drill bit.

[0030] Figure 4 This is a schematic diagram of the structure of the first end face water inlet.

[0031] Figure 5 This is a schematic diagram of the structure of a mid-level drill bit.

[0032] Figure 6 This is a right-side view of the intermediate drilling bit.

[0033] Figure 7 This is a schematic diagram showing the outer surface of the intermediate drilling bit.

[0034] Figure 8 This is a schematic diagram of the structure of the subsequent drill bit.

[0035] Figure 9 This is a right-side view of the drill bit in the rear section.

[0036] Figure 10 This is a schematic diagram showing the arrangement of the third front cutting edge and the second protective cutting edge.

[0037] Figure 11 This is a schematic diagram of the hat head structure.

[0038] Among them, 100-front drill bit, 110-first front cutting edge, 120-recessed hole, 130-first hollow structure, 140-first water channel, 141-first end face water inlet, 142-first outer water groove, 150-middle cutting edge, 160-first water passage, 170-side water passage, 180-first connecting thread, 200-middle layer drill bit, 210-second front cutting edge, 220-first protective cutting edge, 230-second water channel, 231-end face chip removal port, 232-first outer side Spiral water channel, 241-Second connecting thread, 242-Third connecting thread, 300-Rear layer drill bit, 310-Third front cutting edge, 320-Second protective cutting edge, 330-Third water channel, 331-Second water passage, 332-Second end face water inlet, 333-Second outer spiral water channel, 340-Second hollow structure, 351-Fourth connecting thread, 352-Fifth connecting thread, 400-Stabilizing tube, 500-Cap, 510-Outer water channel, 520-Sixth connecting thread. Detailed Implementation

[0039] The following detailed description, in conjunction with the accompanying drawings, illustrates the implementation of this utility model. However, these descriptions do not constitute a limitation of the present utility model and are merely illustrative. Furthermore, the advantages of this utility model will become clearer and easier to understand through this description.

[0040] like Figure 1-11 As shown, a tower-shaped guide drilling bit device suitable for treating silt inside borehole inclinometer tubes is characterized by comprising a front drill bit 100, a middle drill bit 200, a rear drill bit 300, a stabilizing tube 400, and a cap 500, which are threaded together from right to left.

[0041] The front drill bit 100 has a plurality of first front cutting edges 110 spaced apart on the inner side of the right end. The front drill bit 100 has a concave hole 120 on the inner side of the first front cutting edges 110 towards the left end. The left end of the front drill bit 100 is a first hollow structure 130.

[0042] A first water passage 140 is provided between adjacent first front cutting edges 110, and an intermediate cutting edge 150 is provided in the concave hole 120. The first hollow structure 130 and the concave hole 120 are connected through a first water passage 160.

[0043] The middle layer drill bit 200 has multiple second front cutting edges 210 spaced apart on the outer side of the right end, and a first protective cutting edge 220 is provided on the outer surface of the right end of the middle layer drill bit 200.

[0044] A second water passage 230 is provided between adjacent second front cutting edges 210;

[0045] The rear drill bit 300 has multiple third front cutting edges 310 spaced apart on the outer side of the right end, and a second protective cutting edge 320 is provided on the outer surface of the right end of the rear drill bit 300.

[0046] A third water passage 330 is provided between adjacent third front cutting edges 310.

[0047] The diameter of the right end of the front drill bit 100 is smaller than the diameter of the right end of the middle drill bit 200, and the diameter of the right end of the middle drill bit 200 is smaller than the diameter of the right end of the rear drill bit 300.

[0048] The outer surface of the left end of the front drill bit 100 is provided with a plurality of side water passage holes 170 that communicate with the first hollow structure 130 at intervals; the side water passage holes 170 are located to the right of the second front cutting edge 210, and the side water passage holes 170 correspond one-to-one with the second front cutting edge 210.

[0049] The first waterway 140 includes a first end face water inlet 141 and a first outer water groove 142. The first end face water inlet 141 is recessed from the right end of the front drill bit 100 to the left end, and the first outer water groove 142 is recessed from the outer surface of the right end of the front drill bit 100 to the inner surface.

[0050] The second water channel 230 includes an end face chip discharge port 231 and a first outer spiral water channel 232. The end face chip discharge port 231 is recessed from the right end to the left end of the intermediate drill bit 200. The first outer spiral water channel 232 is disposed on the outer surface of the right end of the intermediate drill bit 200 and communicates with the end face chip discharge port 231.

[0051] The angle between the third front cutting edge 310 and the axis of the rear drill bit 300 is 40°-60°.

[0052] The left end of the rear drill bit 300 is a second hollow structure 340. The third water passage 330 includes a second water passage 331, a second end face water inlet 332, and a second outer spiral water groove 333. The second water passage 331 is connected to the second hollow structure 340. The second end face water inlet 332 is recessed from the right end of the rear drill bit 300 to the left end. The second outer spiral water groove 333 is disposed on the outer surface of the right end of the rear drill bit 300 and is connected to the second end face water inlet 332.

[0053] An outer water trough 510 is provided on the outer surface of the left end of the cap 500.

[0054] The first outer spiral water trough 232 has a width of 15-25mm and a depth of 5-10mm; the second outer spiral water trough 333 has a width of 20-40mm and a depth of 8-20mm; the outer water trough 510 has a width of 30-50mm and a depth of 10-20mm.

[0055] The front drill bit 100 has a first connecting thread 180 on its left outer surface, the middle drill bit 200 has a second connecting thread 241 on its right inner wall and a third connecting thread 242 on its left outer surface, the rear drill bit 300 has a fourth connecting thread 351 on its right inner wall and a fifth connecting thread 352 on its left outer surface, the stabilizing tube 400 has internal threads on both its left and right inner walls, and the cap 500 has a sixth connecting thread 520 on its right outer surface. The first connecting thread 180 matches the second connecting thread 241, the third connecting thread 242 matches the fourth connecting thread 351, the fifth connecting thread 352 matches the internal thread on the right end of the stabilizing tube 400, and the sixth connecting thread 520 matches the internal thread on the left end of the stabilizing tube 400.

[0056] This invention addresses the challenge of cleaning silt deposits inside borehole inclinometer tubes by designing a tower-shaped guided drilling bit device. This device utilizes a unique tower-shaped composite drill bit structure to precisely guide the drill bit along its original trajectory during drilling, preventing borehole deviation due to drill bit bouncing. Furthermore, it optimizes the cuttings discharge channel, achieving efficient removal of cuttings from the plastic inclinometer tube. The device employs high-strength, wear-resistant special composite materials, ensuring excellent durability and stability even in complex and harsh drilling environments such as cement slurry drilling and cuttings accumulation. Through repeated testing and continuous optimization in multiple actual borehole inclinometer tube cleaning projects, the device's structure and parameters were specifically adjusted. This patent ultimately resulted in a drill bit device with an ingenious design, outstanding cleaning effect, and convenient installation. It is a dedicated device that can adapt to complex drilling environments and efficiently clean silt deposits inside borehole inclinometer tubes, providing an innovative solution for cleaning silt deposits inside borehole inclinometer tubes.

[0057] In practical use, the drill bit of this utility model is a three-layer composite drill bit formed by a front drill bit 100, a middle drill bit 200, and a rear drill bit 300; the stabilizing tube 400 is a circular tube with a length of 1.5-3m, and the diameter of the stabilizing tube 400 is 8-15mm smaller than the diameter of the rear drill bit 300; the cap 500 is an internal hollow joint with an outer diameter 3-8mm smaller than that of the rear drill bit 300.

[0058] The first front cutting edge 110 is welded to the right end of the front drill bit 100 and must not have an outward cutting edge; the middle cutting edge 150 is set in a concave hole 120 with a depth of 25-50mm.

[0059] The cap head 500 is an external spline-shaped cylinder with an external water groove 510. The external water groove 510 is 20-50mm wide and 5-15mm deep. It can be a straight groove with the same axis or a spiral groove. The inner surface of the left end of the cap head 500 is provided with a drill rod connecting thread 530.

[0060] All other unspecified parts belong to the prior art.

Claims

1. A tower-shaped guide drilling bit device suitable for processing silt deposits inside borehole inclinometer tubes, characterized in that: It includes a front drill bit (100), a middle drill bit (200), a rear drill bit (300), a stabilizing tube (400), and a cap (500) that are threaded together from right to left; The front drill bit (100) has a plurality of first front cutting edges (110) spaced apart on the inner side of the right end. The front drill bit (100) has a concave hole (120) on the inner side of the first front cutting edges (110) towards the left end. The left end of the front drill bit (100) is a first hollow structure (130). A first water passage (140) is provided between adjacent first front cutting edges (110), and an intermediate cutting edge (150) is provided in the concave hole (120). The first hollow structure (130) and the concave hole (120) are connected through a first water passage (160). The middle layer drill bit (200) has multiple second front cutting edges (210) spaced apart on the outer side of the right end, and a first protective cutting edge (220) is provided on the outer surface of the right end of the middle layer drill bit (200); A second water passage (230) is provided between adjacent second front cutting edges (210); The rear drill bit (300) has multiple third front cutting edges (310) spaced apart on the outer side of the right end, and a second protective cutting edge (320) is provided on the outer surface of the right end of the rear drill bit (300). A third water passage (330) is provided between adjacent third front cutting edges (310).

2. The tower-shaped guide drilling bit device for treating silt deposits inside borehole survey tubes according to claim 1, characterized in that: The diameter of the right end of the front drill bit (100) is smaller than the diameter of the right end of the middle drill bit (200), and the diameter of the right end of the middle drill bit (200) is smaller than the diameter of the right end of the rear drill bit (300).

3. The tower-shaped guide drilling bit device for treating silt deposits inside borehole inclinometers according to claim 1, characterized in that: The outer surface of the left end of the front drill bit (100) is provided with a plurality of side water passage holes (170) that communicate with the first hollow structure (130); the side water passage holes (170) are located on the right side of the second front cutting edge (210), and the side water passage holes (170) correspond one-to-one with the second front cutting edge (210).

4. The tower-shaped guide drilling bit device for treating silt deposits inside borehole survey tubes according to claim 3, characterized in that: The first water channel (140) includes a first end face water inlet (141) and a first outer water groove (142). The first end face water inlet (141) is recessed from the right end of the front drill bit (100) to the left end, and the first outer water groove (142) is recessed from the outer surface of the right end of the front drill bit (100) to the inner surface.

5. The tower-shaped guide drilling bit device for treating silt deposits inside borehole inclinometers according to claim 4, characterized in that: The second water channel (230) includes an end face chip discharge port (231) and a first outer spiral water groove (232). The end face chip discharge port (231) is recessed from the right end to the left end of the intermediate drill bit (200). The first outer spiral water groove (232) is disposed on the outer surface of the right end of the intermediate drill bit (200) and communicates with the end face chip discharge port (231).

6. The tower-shaped guide drilling bit device for treating silt deposits inside borehole survey tubes according to claim 5, characterized in that: The angle between the third front cutting edge (310) and the axis of the rear drill bit (300) is 40°-60°.

7. The tower-shaped guide drilling bit device for treating silt deposits inside borehole survey tubes according to claim 6, characterized in that: The left end of the rear drill bit (300) is a second hollow structure (340). The third water channel (330) includes a second water passage (331), a second end face water outlet (332), and a second outer spiral water groove (333). The second water passage (331) is connected to the second hollow structure (340). The second end face water outlet (332) is recessed from the right end of the rear drill bit (300) to the left end. The second outer spiral water groove (333) is located on the outer surface of the right end of the rear drill bit (300) and is connected to the second end face water outlet (332).

8. The tower-shaped guide drilling bit device for treating silt deposits inside borehole survey tubes according to claim 7, characterized in that: An outer water trough (510) is provided on the outer surface of the left end of the cap (500).

9. The tower-shaped guide drilling bit device for treating silt deposits inside borehole survey tubes according to claim 8, characterized in that: The first outer spiral water trough (232) has a width of 15-25mm and a depth of 5-10mm; the second outer spiral water trough (333) has a width of 20-40mm and a depth of 8-20mm; the outer water trough (510) has a width of 30-50mm and a depth of 10-20mm.

10. The tower-shaped guide drilling bit device for treating silt deposits inside borehole survey tubes according to claim 1, characterized in that: The front drill bit (100) has a first connecting thread (180) on the outer surface of its left end. The middle drill bit (200) has a second connecting thread (241) on the inner wall of its right end and a third connecting thread (242) on its outer surface of its left end. The rear drill bit (300) has a fourth connecting thread (351) on the inner wall of its right end and a fifth connecting thread (352) on its outer surface of its left end. The stabilizing tube (400) has internal threads on the inner walls of both ends. The cap (500) has a sixth connecting thread (520) on its outer surface of its right end. The first connecting thread (180) matches the second connecting thread (241), the third connecting thread (242) matches the fourth connecting thread (351), the fifth connecting thread (352) matches the internal thread on the right end of the stabilizing tube (400), and the sixth connecting thread (520) matches the internal thread on the left end of the stabilizing tube (400).

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