Double-wall reverse circulation drilling tool for horizontal coring drilling in mines
Patent Information
- Application Number
- CN202522741036.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-24
AI Technical Summary
在进行取芯时，需在地面打孔方可取样，然而，矿区地下情况复杂，时常会碰到较硬的矿石，这会致使在破碎过程中，钻杆表面的齿牙出现剧烈磨损，由于钻杆表面设置有多个齿牙，且每个齿牙的受损状况不尽相同，若整体更换，会增加资金投入，造成受损较轻的齿牙被浪费，此外，现有技术中齿牙与钻杆多采用螺栓连接，导致更换时颇为不便
[0012]与现有技术相比，本实用新型的有益效果是：在使用时，通过在钻杆表面圆周阵列开设插槽，进而方便第一齿牙板带动第二齿牙板，通过其后侧的定位插板与钻杆进行插接，以实现第一齿牙板的分散化，进而可以进行第一齿牙板的单独更换，且通过在钻杆表面设置旋转限位组件，进而可以对钻杆表面的第一齿牙板快速进行限位与分离，方便进行更换；
Smart Images
Figure CN224903149U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of double-wall reverse circulation drilling tools, and in particular relates to a double-wall reverse circulation drilling tool for mining horizontal coring. Background Technology
[0002] Double-wall reverse circulation drilling is a drilling device consisting of inner and outer tubes. The flushing medium (such as air, water or mud) is transported to the bottom of the hole through the annular space between the inner drill pipes, and then carries rock cuttings or core back to the surface along the central channel of the inner tube, thus forming a reverse circulation core sampling operation. When coring, it is necessary to drill holes in the ground to take samples. However, the underground conditions in the mining area are complex, and hard ores are often encountered. This causes severe wear on the teeth on the surface of the drill rod during the crushing process. Since there are multiple teeth on the surface of the drill rod, and the damage condition of each tooth is not the same, replacing the whole thing would increase the capital investment and waste the less damaged teeth. In addition, in the existing technology, the teeth and drill rod are mostly connected by bolts, which makes replacement quite inconvenient.
[0003] Therefore, how to provide a double-walled reverse circulation drilling tool for horizontal coring in mining is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0004] The purpose of this utility model is to provide a double-walled reverse circulation drilling tool for horizontal coring in mining, which aims to solve the problems mentioned in the background art.
[0005] This utility model is implemented as follows: a double-walled reverse circulation drilling tool for horizontal coring in mining, comprising; A drill rod, wherein an inner tube is provided on the inner side of the drill rod; Slots, the slots being arranged in a circumferential array on the surface of the drill rod; A positioning insert plate, wherein the positioning insert plate is inserted into the inside of a slot; The first toothed plate is fixedly installed on the outside of the positioning insert plate, and a second toothed plate is provided at the bottom. A rotation limiting assembly is disposed on the surface of the drill rod to limit the positioning insert plate.
[0006] Preferably, a positioning component is provided between the drill rod and the inner tube. The positioning component includes grooves and balls. The groove array is formed on the inner side of the drill rod. A first sliding groove is symmetrically formed in the middle of the upper and lower sides of the groove. A protrusion extending into the groove is arranged in an array on the outer side of the inner tube. A second sliding groove is symmetrically formed in the middle of the upper and lower sides of the protrusion and is arranged corresponding to the first sliding groove. The balls are arranged in a circumferential array between the first and second sliding grooves. A silicone sleeve is provided on the inner side of the drill rod to reduce the friction between the drill rod and the inner tube.
[0007] Preferably, the rotation limiting assembly includes a rotation handle and a ring belt. The top of the slot has a rotation groove and a slider. A rotation ring is fixedly installed on the outside of the slider. The rotation handle is fixedly installed on the outside of the rotation ring. The surface of the rotation ring has a circumferential array of limiting grooves and a limiting insert plate is inserted. The ring belt is fixedly installed on the top of the limiting insert plate so as to movably abut against the top of the rotation ring.
[0008] Preferably, the surface of the drill rod is provided with a threaded groove, and the inner side of the rotating ring is movably connected to the threaded groove.
[0009] Preferably, the rotating groove is arc-shaped, and the slider slides up and down along the rotating groove to limit the positioning plate.
[0010] Preferably, the height of the protrusion is less than the height of the groove, and the length of the protrusion is less than the length of the groove.
[0011] Preferably, the drill rod is split in half, and the inner side of the drill rod is adhered to the surface of the silicone sleeve.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, by opening slots in a circumferential array on the surface of the drill rod, the first tooth plate can drive the second tooth plate, and the positioning plate on its rear side can be inserted into the drill rod to realize the dispersion of the first tooth plate, so that the first tooth plate can be replaced individually. Furthermore, by setting a rotation limiting component on the surface of the drill rod, the first tooth plate on the surface of the drill rod can be quickly limited and separated, making it convenient for replacement. Meanwhile, by setting a positioning component between the drill pipe and the inner tube, the friction between the inner tube and the drill pipe is reduced, and the position of the inner tube can be constrained. As a result, when the inner tube is pumping mud and water, it can rotate in place, thereby reducing the impact damage to the inner tube caused by the mineral cuttings contained in the mud and water. Attached Figure Description
[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0014] Figure 1 A schematic diagram of the overall appearance structure of a double-walled reverse circulation drilling tool for horizontal coring in mining, provided for an embodiment of this utility model; Figure 2 A schematic diagram showing the overall appearance of a double-walled reverse circulation drilling tool for horizontal coring in mining, provided for an embodiment of this utility model; Figure 3A schematic diagram of the main view cross-sectional structure of a double-walled reverse circulation drilling tool for horizontal coring in mining, provided for an embodiment of this utility model; Figure 4 A schematic diagram of the main view section of a double-walled reverse circulation drilling tool for horizontal coring in mining, provided for an embodiment of this utility model; Figure 5 Provided for the embodiments of this utility model Figure 4 A magnified structural diagram of part A.
[0015] In the diagram: 1-Drill rod, 2-Inner tube, 3-Slot, 4-Positioning plate, 5-First toothed plate, 6-Rotating groove, 7-Threaded groove, 8-Rotating ring, 9-Rotating handle, 10-Slider, 11-Limiting groove, 12-Limiting plate, 13-Ring belt, 14-Second toothed plate, 15-Groove, 16-First sliding groove, 17-Ball, 18-Silicone sleeve, 19-Second sliding groove, 20-Protrusion. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.
[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The diagram shown is a structural schematic of a double-walled reverse circulation drilling tool for horizontal coring in mining, provided in one embodiment of the present invention, comprising: Drill rod 1, with an inner tube 2 installed on the inner side of drill rod 1; Slot 3, a circular array of slots 3 is formed on the surface of drill rod 1; Positioning plate 4 is inserted into the slot 3; The first toothed plate 5 is fixedly installed on the outside of the positioning insert plate 4, and a second toothed plate 14 is provided at the bottom. A rotary limiting component is disposed on the surface of drill rod 1 to limit the positioning plate 4.
[0019] In this embodiment of the invention, when in use, slots 3 are provided in a circumferential array on the surface of the drill rod 1, which facilitates the first tooth plate 5 to drive the second tooth plate 14. The second tooth plate 14 is then inserted into the drill rod 1 via the positioning plate 4 on its rear side, thereby dispersing the first tooth plate 5 and allowing for individual replacement of the first tooth plate 5. Furthermore, by providing a rotation limiting component on the surface of the drill rod 1, the first tooth plate 5 on the surface of the drill rod 1 can be quickly limited and separated for easy replacement.
[0020] like Figure 3 , Figure 4 and Figure 5 As shown, in a preferred embodiment of the present invention, a positioning component is provided between the drill rod 1 and the inner tube 2. The positioning component includes a groove 15 and balls 17. The groove 15 is arrayed on the inner side of the drill rod 1. The first sliding groove 16 is symmetrically provided in the middle of the upper and lower sides of the groove 15. The outer side of the inner tube 2 is arrayed with protrusions 20 extending into the groove 15. The middle of the upper and lower sides of the protrusions 20 is symmetrically provided with second sliding grooves 19, which are corresponding to the first sliding grooves 16. The balls 17 are circumferentially arrayed between the first sliding grooves 16 and the second sliding grooves 19. A silicone sleeve 18 is provided on the inner side of the drill rod 1 to reduce the friction between the drill rod 1 and the inner tube 2.
[0021] In this embodiment of the utility model, when using the inner tube 2 to extract yellow mud water, under the impact and entrainment of the yellow mud water and mineral chips, the inner tube 2 rotates against the silicone sleeve 18. With the cooperation of the ball 17 between the second sliding groove 19 in the middle of the protrusion 20 at the outer end of the inner tube 2 and the first sliding groove 16 in the inner cavity groove 15 of the drill rod 1, not only is the inner tube 2 limited, but the friction between the inner tube 2 and the drill rod 1 is also reduced, thereby allowing the inner tube 2 to rotate smoothly and reducing the impact damage of mineral chips to the inner tube 2. By setting a positioning component between the drill rod 1 and the inner tube 2, the friction between the inner tube 2 and the drill rod 1 is reduced, and the position of the inner tube 2 can be constrained. When the inner tube 2 is pumping mud and water, it can rotate in place, thereby reducing the impact damage to the inner tube 2 caused by the mineral cuttings contained in the mud and water.
[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment of the present invention, the rotating limiting assembly includes a rotating handle 9 and a ring belt 13. The top of the slot 3 is provided with a rotating groove 6 and a slider 10. A rotating ring sleeve 8 is fixedly installed on the outside of the slider 10. The rotating handle 9 is fixedly installed on the outside of the rotating ring sleeve 8. A limiting groove 11 is formed in a circumferential array on the surface of the rotating ring sleeve 8, and a limiting insert plate 12 is inserted and provided. The ring belt 13 is fixedly installed on the top of the limiting insert plate 12 so as to movably abut against the top of the rotating ring sleeve 8.
[0023] In this embodiment of the utility model, when the first toothed plate 5 and the second toothed plate 14 are replaced, the ring belt 13 drives the limiting plate 12 to move upward, thereby separating it from the limiting groove 11 on the surface of the rotating ring sleeve 8. Then, the rotating ring sleeve 8 can rotate upward with the help of the rotating handle 9, thereby driving the slider 10 on its inner side to spiral upward along the surface of the drill rod 1. This causes the slider 10 to move away from the top of the positioning plate 4, allowing the positioning plate 4 on the rear side of the first toothed plate 5 to move upward and separate along the slot 3 on the surface of the drill rod 1. Then, the first toothed plate 5 and the second toothed plate 14 at any position can be replaced. By setting a rotation limit component, the limit on the first tooth plate 5 can be loosened simply by moving the limit plate 12 upward and rotating the rotating ring 8, thus facilitating the maintenance and replacement of the first tooth plate 5.
[0024] like Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the surface of the drill rod 1 is provided with a threaded groove 7, and the inner side of the rotating ring 8 is movably connected to the threaded groove 7.
[0025] In this embodiment of the utility model, when in use, a threaded groove 7 is provided on the surface of the drill rod 1, so that the inner side of the rotating ring sleeve 8 is movably connected with the threaded groove 7, so that the rotating ring sleeve 8 can only move up and down in a spiral manner, and with the cooperation of the limiting insert plate 12, the rotating ring sleeve 8 is prevented from moving under the impact of mud and water.
[0026] like Figure 2 As shown, in a preferred embodiment of the present invention, the rotating groove 6 is set in an arc shape, and the slider 10 slides up and down along the rotating groove 6 to limit the positioning plate 4.
[0027] In this embodiment of the invention, when in use, by setting the rotating groove 6 to an arc shape, the slider 10 can slide up and down along the rotating groove 6 to limit the positioning plate 4, thereby facilitating the replacement of the first toothed plate 5.
[0028] like Figure 3 , Figure 4 and Figure 5 As shown, in a preferred embodiment of the present invention, the height of the protrusion 20 is less than the height of the groove 15, and the length of the protrusion 20 is less than the length of the groove 15.
[0029] In this embodiment of the invention, when in use, by making the height of the protrusion 20 less than the height of the groove 15 and the length of the protrusion 20 less than the length of the groove 15, the contact and frictional resistance between the protrusion 20 and the groove 15 is reduced.
[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in a preferred embodiment of this utility model, the drill rod 1 is arranged in half, and the inner side of the drill rod 1 is attached to the surface of the silicone sleeve 18.
[0031] In this embodiment of the utility model, when in use, the drill rod 1 is split in half to facilitate the removal and placement of the internal structure, and the inner side of the drill rod 1 is attached to the surface of the silicone sleeve 18 to facilitate the replacement of the silicone sleeve 18.
[0032] The above embodiments of this utility model provide a double-walled reverse circulation drill for horizontal coring in mining. When the first tooth plate 5 and the second tooth plate 14 are replaced, the ring belt 13 drives the limiting plate 12 to move upward, thereby separating it from the limiting groove 11 on the surface of the rotating ring sleeve 8. Then, the rotating ring sleeve 8 can rotate upward with the cooperation of the rotating handle 9, which in turn drives the slider 10 on its inner side to move upward along the rotating groove 6 at the thread groove 7 on the surface of the drill rod 1, thereby moving the slider 10 away from the top of the positioning plate 4. This allows the positioning insert 4 on the rear side of the first tooth plate 5 to move upward and separate along the slot 3 on the surface of the drill rod 1, so that the first tooth plate 5 and the second tooth plate 14 at the bottom can be replaced at any position. When in use, water is added to the holes opened by the first tooth plate 5 and the second tooth plate 14. With the help of mud and sand, the water forms yellow mud water, which is then carried out by the inner pipe 2 and discharged into the sedimentation tank for sedimentation and separation. The separated yellow mud water is then discharged back into the holes to achieve reverse circulation. When extracting muddy water through the inner tube 2, the inner tube 2 rotates against the silicone sleeve 18 under the impact and entrainment of the muddy water and mineral cuttings. With the cooperation of the ball bearings 17 between the second sliding groove 19 in the middle of the protrusion 20 at the outer end of the inner tube 2 and the first sliding groove 16 in the inner cavity groove 15 of the drill rod 1, the inner tube 2 is not only limited, but the friction between the inner tube 2 and the drill rod 1 is also reduced, thereby allowing the inner tube 2 to rotate smoothly and reducing the impact damage of mineral cuttings on the inner tube 2.
[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A double-walled reverse circulation drilling tool for horizontal coring in mining, characterized in that, include; Drill rod (1), with an inner tube (2) provided on the inner side of the drill rod (1); Slots (3), the slots (3) are arranged in a circumferential array on the surface of the drill rod (1); Positioning insert (4), which is inserted into the slot (3); The first toothed plate (5) is fixedly installed on the outside of the positioning insert plate (4), and a second toothed plate (14) is provided at the bottom. A rotation limiting assembly is disposed on the surface of the drill rod (1) to limit the positioning insert (4).
2. The double-walled reverse circulation drilling tool for horizontal coring in mining according to claim 1, characterized in that, A positioning component is provided between the drill rod (1) and the inner tube (2). The positioning component includes a groove (15) and balls (17). The groove (15) is arrayed on the inner side of the drill rod (1). A first sliding groove (16) is symmetrically opened in the middle of the upper and lower sides of the groove (15). A protrusion (20) extending into the groove (15) is arrayed on the outer side of the inner tube (2). A second sliding groove (19) is symmetrically opened in the middle of the upper and lower sides of the protrusion (20) and is corresponding to the first sliding groove (16). The balls (17) are circumferentially arrayed between the first sliding groove (16) and the second sliding groove (19). A silicone sleeve (18) is provided on the inner side of the drill rod (1) to reduce the friction between the drill rod (1) and the inner tube (2).
3. The double-walled reverse circulation drilling tool for horizontal coring in mining according to claim 1, characterized in that, The rotating limiting assembly includes a rotating handle (9) and a ring belt (13). The top of the slot (3) is provided with a rotating groove (6) and a slider (10). A rotating ring sleeve (8) is fixedly installed on the outside of the slider (10). The rotating handle (9) is fixedly installed on the outside of the rotating ring sleeve (8). The rotating ring sleeve (8) has a circumferential array of limiting grooves (11) on its surface and a limiting insert plate (12) is inserted. The ring belt (13) is fixedly installed on the top of the limiting insert plate (12) so as to movably abut against the top of the rotating ring sleeve (8).
4. A double-walled reverse circulation drilling tool for horizontal coring in mining according to claim 3, characterized in that, The drill rod (1) has a threaded groove (7) on its surface, and the inner side of the rotating ring (8) is movably connected to the threaded groove (7).
5. A double-walled reverse circulation drilling tool for horizontal coring in mining according to claim 3, characterized in that, The rotating groove (6) is set in an arc shape, and the slider (10) slides up and down along the rotating groove (6) to limit the positioning plate (4).
6. A double-walled reverse circulation drilling tool for horizontal coring in mining according to claim 2, characterized in that, The height of the protrusion (20) is less than the height of the groove (15), and the length of the protrusion (20) is less than the length of the groove (15).
7. A double-walled reverse circulation drilling tool for horizontal coring in mining according to claim 2, characterized in that, The drill rod (1) is split in half, and the inner side of the drill rod (1) is attached to the surface of the silicone sleeve (18).