Directional through-the-hole rock reamer

Abstract

The utility model provides a directional crossing positive expansion rock hole expander belongs to rock hole expanding technical field, including the hole expander body still includes: connecting mechanism, the connecting mechanism includes the clamping block of inlaying in the outer wall of hole expander body, the top of clamping block is fixed with the supporting arm, the bottom of supporting arm is inlayed with the top of hole expander body, the side of supporting arm is rotatably connected with the cone, the outer wall of hole expander body is fixed with a plurality of clamping strip, two adjacent clamping strips are a group, clamping block is clamped in two adjacent clamping strips of the same group, and clamping block is fixed on the outer wall of hole expander body through bolt. The utility model discloses through setting clamping block and clamping strip, clamping block inserts between two adjacent clamping strips and is fixed on the outer wall of hole expander body through bolt, thereby realizes the fixation of supporting arm, can realize the disassembly of supporting arm with bolt disassembly, and the operation is simple, need not complicated welding and finishing step, thereby improved the convenience of supporting arm replacement.

Description

Technical Field

[0001] This utility model relates to the field of rock borehole enlargement technology, and in particular to a directional borehole enlarger for traversing positive rock. Background Technology

[0002] Directional drilling reamers are reaming tools used when drilling horizontally through rock formations. The reamer is equipped with a carbide or diamond cone. The high-pressure mud delivered by the drill pipe drives the motor to rotate, which in turn drives the reamer to rotate and break the rock. It expands the hole diameter from the starting end to the end along the pre-drilled guide hole, while simultaneously clearing rock cuttings, thus meeting the reaming requirements for directional drilling through rock formations.

[0003] In common directional rock reamers, the pressure roller is mounted on a support arm, which is welded to the reamer. When the support arm is damaged, it must first be cut off from the reamer using a cutting device, then the corresponding welded position on the reamer must be repaired, and a new support arm must be welded to the reamer using a welding device. Although the above method allows for the replacement of the support arm, there is a need for further optimization in terms of ease of replacement. Therefore, this application provides a directional rock reamer to meet this need. Utility Model Content

[0004] This invention provides a directional rock reamer to address the issue of insufficient ease of replacing the reamer's support arm.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A directional reamer for penetrating positively oriented rock includes a reamer body and further comprises:

[0007] The connecting mechanism includes a locking block that fits against the outer wall of the reamer body. A support arm is fixed to the top of the locking block, and the bottom of the support arm fits against the top of the reamer body. A toothed wheel is rotatably connected to the side of the support arm. Multiple locking strips are fixed to the outer wall of the reamer body. Two adjacent locking strips form a group, and the locking block is locked in two adjacent locking strips in the same group. The locking block is fixed to the outer wall of the reamer body by bolts.

[0008] Preferably, the bottom of the card block has an inclined guide surface, which is used to guide the card block to be inserted between the two card strips.

[0009] Preferably, the side of the card strip away from the card block is fixed with an extension, which is fixed to the outer wall of the expander body.

[0010] Preferably, the bottom of the support arm is provided with a plurality of positioning holes, and a positioning block inserted into the positioning hole is fixed on the top of the reamer body.

[0011] Preferably, the positioning block is frustum-shaped, and the shape of the positioning hole is adapted to the shape of the positioning block.

[0012] Preferably, a protruding strip is fixed to the side of the card block, and the protruding strip is fixed to the side of the support arm.

[0013] Preferably, the top of the protrusion has an inclined surface, and a cutting head is fixedly connected to both the protrusion and the inclined surface, with an indicator block pre-embedded in one of the cutting heads.

[0014] Preferably, a protrusion is integrally formed on the circumferential surface of the indicator block, and the protrusion is located inside the cutting head.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects:

[0016] In the above solution, by setting a locking block and a locking strip, the locking block is inserted between two adjacent locking strips and fixed to the outer wall of the expander body with bolts, thereby fixing the support arm. The support arm can be disassembled by removing the bolts. The operation is simple and does not require complicated welding and repair steps, thus improving the convenience of support arm replacement.

[0017] By setting a positioning block, after the card block is inserted between the two card strips, the support arm fits against the top of the reamer body. The positioning block is inserted into the positioning hole at the bottom of the support arm, which improves the tightness of the connection between the support arm and the reamer body, thereby improving the stability of the support arm.

[0018] By setting a protruding strip, which is fixed at the connection position between the card block and the support arm, the contact area between the card block and the support arm is increased, thereby improving the connection strength between the card block and the support arm.

[0019] By setting a cutting head, the cutting head rotates synchronously during the rotation of the reamer body. In conjunction with the pressure roller, it can also realize multi-stage reaming of the hole, which can correct the hole diameter accuracy. At the same time, through the cooperation of multiple cutting heads, it can achieve fine cutting and finishing of the inner wall of the hole after reaming by the roller, making the inner wall of the reamed hole smoother, improving the reaming quality, and reducing subsequent construction errors.

[0020] By setting an indicator block and a protrusion, the indicator block is pre-embedded inside one of the cutting heads. During use, the cutting head will gradually wear down. Once the indicator block is exposed, the cutting head can be replaced. The protrusion on the indicator block can reduce the space occupied by the indicator block inside the cutting head. The wear degree of the cutting head can be accurately indicated without the need for a large-diameter indicator block, thereby ensuring the structural strength of the cutting head itself. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the card strip of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the protruding strip of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the support arm of this utility model;

[0025] Figure 5 This is a cross-sectional view of the indicator block of this utility model.

[0026] In the figure: 1. Hole expander body; 2. Connecting mechanism; 3. Support arm; 4. Locking block; 5. Locking strip; 6. Extension; 7. Guide surface; 8. Positioning block; 9. Positioning hole; 10. Protrusion; 11. Inclined surface; 12. Cutting head; 13. Indicator block; 14. Protrusion; 15. Toothed wheel. Detailed Implementation

[0027] The present invention provides a directional rock reamer with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0028] like Figures 1-5 As shown, an embodiment of this utility model provides a directional rock reamer, including a reamer body 1, and further comprising:

[0029] The connecting mechanism 2 includes a locking block 4 that fits against the outer wall of the reamer body 1. A support arm 3 is fixed to the top of the locking block 4, and the bottom of the support arm 3 fits against the top of the reamer body 1. A toothed wheel 15 is rotatably connected to the side of the support arm 3. Multiple locking strips 5 are fixed to the outer wall of the reamer body 1. Two adjacent locking strips 5 form a group. The locking block 4 is locked in the two adjacent locking strips 5 in the same group. The locking block 4 is fixed to the outer wall of the reamer body 1 by bolts. The locking block 4 and the locking strips 5 cooperate to realize the quick positioning and installation of the support arm 3. The bolt fixation ensures a stable connection and prevents the support arm 3 from loosening during the reaming operation. When disassembling, the support arm 3 can be removed by simply unscrewing the bolts. No welding or repair is required, which greatly improves the convenience of replacing the support arm 3. The toothed wheel 15 rotates with the reamer body 1 and realizes the forward reaming of the rock hole through revolution and rotation.

[0030] like Figure 4As shown in this embodiment, the bottom of the card block 4 is provided with an inclined guide surface 7. The guide surface 7 is used to guide the card block 4 to be inserted between the two card strips 5. The inclined guide surface 7 reduces the difficulty of aligning the card block 4 between the card strips 5, and guides the card block 4 to be inserted quickly and smoothly between the two card strips 5 without the need for precise alignment, which simplifies the installation operation and improves the installation efficiency of the support arm 3.

[0031] like Figure 2 As shown in this embodiment, the side of the locking strip 5 away from the locking block 4 is fixed with an extension 6. The extension 6 is fixed to the outer wall of the reamer body 1. The extension 6 increases the connection area between the locking strip 5 and the reamer body 1, improves the connection stability and structural strength of the locking strip 5, prevents the locking strip 5 from deforming due to excessive force during the reaming operation, and ensures the installation stability of the support arm 3.

[0032] like Figure 2 and Figure 4 As shown in this embodiment, the bottom of the support arm 3 is provided with a number of positioning holes 9, and the top of the reamer body 1 is fixed with a positioning block 8 inserted into the positioning hole 9. The positioning block 8 cooperates with the positioning hole 9 to accurately position the relative position of the support arm 3 and the reamer body 1, avoid the support arm 3 from being installed off-center, and at the same time enhance the connection tightness between the support arm 3 and the reamer body 1 to prevent the support arm 3 from shaking when the reamer rotates.

[0033] like Figure 2 As shown in this embodiment, the positioning block 8 is frustum-shaped, and the shape of the positioning hole 9 is adapted to the shape of the positioning block 8. The frustum-shaped positioning block 8 and the adapted positioning hole 9 form a guide structure, which facilitates the quick insertion of the positioning block 8 into the positioning hole 9, simplifies the installation operation, and at the same time, the frustum structure makes the fit tighter, further improving the connection stability, dispersing the force during operation, and avoiding local stress concentration.

[0034] like Figure 3 and Figure 4 As shown in this embodiment, a protrusion 10 is fixed to the side of the locking block 4. The protrusion 10 is fixed to the side of the support arm 3. The protrusion 10 increases the contact area between the locking block 4 and the support arm 3, improves the connection strength between the two, and prevents the connection between the locking block 4 and the support arm 3 from breaking during the hole enlarging operation.

[0035] like Figure 5As shown in this embodiment, the top of the protrusion 10 is provided with an inclined surface 11. Both the protrusion 10 and the inclined surface 11 are fixedly connected to cutting heads 12. The cutting heads 12 are made of cemented carbide or diamond. One of the cutting heads 12 has an indicator block 13 embedded in it. The cutting head 12 rotates with the hole expander body 1 and cooperates with the roller cone 15 to realize multi-stage hole expansion and correct the hole diameter accuracy. The cutting head 12 performs fine finishing on the inner wall of the hole after the roller cone 15 expands the hole, making the inner wall smoother and improving the hole expansion quality. The cutting head 12 on the inclined surface 11 first contacts the inner wall of the hole to realize the initial cutting of hole diameter change and prevent the end of the protrusion 10 from getting stuck with the inner wall of the hole. Then the cutting head 12 on the protrusion 10 finally finishes the hole diameter. The indicator block 13 is used to judge the wear degree of the cutting head 12. When the indicator block 13 is exposed, it prompts to replace it to avoid the hole expansion effect being affected by excessive wear of the cutting head 12.

[0036] like Figure 5 As shown in this embodiment, a protrusion 14 is integrally formed on the circumferential surface of the indicator block 13. The protrusion 14 is located inside the cutting head 12. The protrusion 14 reduces the space occupied by the indicator block 13 in the cutting head 12. The wear condition of the cutting head 12 can be accurately indicated without the need for a large-diameter indicator block 13. At the same time, the structural strength of the cutting head 12 is guaranteed, and the cutting performance is prevented from decreasing due to the embedding of an excessively large indicator block 13. This ensures that the cutting head 12 can stably perform the fine dressing function.

[0037] Working principle: Align the locking block 4 with the two adjacent locking strips 5 of the same group on the outer wall of the reamer body 1. The inclined guide surface 7 at the bottom of the locking block 4 will guide it to be smoothly inserted between the two locking strips 5. At this time, the bottom of the support arm 3 is in contact with the top of the reamer body 1. The frustum-shaped positioning block 8 at the top of the reamer body 1 is inserted into the positioning hole 9 at the bottom of the support arm 3, which improves the connection tightness between the support arm 3 and the reamer body 1. Then, the locking block 4 is fixed to the outer wall of the reamer body 1 with bolts, which can realize the stable installation of the support arm 3. The protrusion 10 on the side of the locking block 4 is fixed to the side of the support arm 3, which increases the contact area between the locking block 4 and the support arm 3 and improves the connection strength between the locking block 4 and the support arm 3. The extension 6 on the side of the locking strip 5 away from the locking block 4 enhances the connection stability between the locking strip 5 and the reamer body 1, thereby improving the connection strength between the locking strip 5 and the reamer body 1 and preventing the locking strip 5 from deforming under force.

[0038] During the reaming operation, the reamer body 1 is mounted on the drill rod. The rotation of the drill rod drives the reamer body 1 to rotate, which in turn drives the support arm 3 and the roller wheel 15 on the side to rotate synchronously. After the roller wheel 15 contacts the rock, it both revolves and rotates, thus achieving the initial reaming of the rock hole. At the same time, the multiple cutting heads 12 on the convex strip 10 and the inclined surface 11 rotate with the reamer body 1 and cooperate with the roller wheel 15 to achieve multi-stage reaming and correct the hole diameter accuracy. The cutting heads 12 perform fine cutting and trimming on the inner wall of the hole after the roller wheel 15 has reamed, making the inner wall of the hole smoother, improving the reaming quality, and reducing subsequent construction errors.

[0039] During use, the cutting head 12 will gradually wear down. One of the cutting heads 12 has an indicator block 13 embedded in it to determine the degree of wear. When the cutting head 12 wears down to the point that the indicator block 13 is exposed, it means that the cutting head 12 has reached the end of its service life and needs to be replaced in time. The protrusion 14 on the circumferential surface of the indicator block 13 is embedded in the cutting head 12, which reduces the space occupied by the indicator block 13 in the cutting head 12. It is not necessary to use a large-diameter indicator block 13 to accurately indicate the wear state, thus ensuring the structural strength of the cutting head 12 itself and preventing its cutting performance from being reduced due to the embedding of the indicator block 13.

[0040] When the outrigger 3 needs to be replaced, simply unscrew the bolts of the fixing block 4, pull the block 4 out from between the two locking strips 5, and the outrigger 3 can be removed for replacement. No welding or repair steps are required during replacement, which greatly improves the convenience of replacing the outrigger 3.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A directional borehole reamer for traversing positively expanding rock, comprising a reamer body (1), characterized in that, Also includes: The connecting mechanism (2) includes a locking block (4) that fits against the outer wall of the expander body (1). A support arm (3) is fixed to the top of the locking block (4). The bottom of the support arm (3) fits against the top of the expander body (1). A toothed wheel (15) is rotatably connected to the side of the support arm (3). Multiple locking strips (5) are fixed to the outer wall of the expander body (1). Two adjacent locking strips (5) form a group. The locking block (4) is locked in two adjacent locking strips (5) in the same group. The locking block (4) is fixed to the outer wall of the expander body (1) by bolts.

2. The directional rock reamer according to claim 1, characterized in that, The bottom of the card block (4) is provided with an inclined guide surface (7), which is used to guide the card block (4) to be inserted between the two card strips (5).

3. The directional rock reamer according to claim 1, characterized in that, The card strip (5) has an extension (6) fixed on the side away from the card block (4), and the extension (6) is fixed to the outer wall of the expander body (1).

4. The directional rock reamer according to claim 1, characterized in that, The bottom of the support arm (3) is provided with several positioning holes (9), and the top of the hole expander body (1) is fixed with a positioning block (8) inserted into the positioning hole (9).

5. The directional rock reamer according to claim 4, characterized in that, The positioning block (8) is frustum shaped, and the shape of the positioning hole (9) is adapted to the shape of the positioning block (8).

6. The directional rock reamer according to claim 1, characterized in that, The side of the card block (4) is fixed with a protrusion (10), and the protrusion (10) is fixed to the side of the support arm (3).

7. The directional rock reamer according to claim 6, characterized in that, The top of the protrusion (10) is provided with a slope (11), and a cutting head (12) is fixedly connected to both the protrusion (10) and the slope (11), and an indicator block (13) is pre-embedded in one of the cutting heads (12).

8. The directional rock reamer according to claim 7, characterized in that, The indicator block (13) has an integrally formed protrusion (14) on its circumferential surface, and the protrusion (14) is located inside the cutting head (12).

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