Anti-jamming reaming type rotary wing drill

Abstract

The application discloses a kind of anti-sticking reaming type rotary wing drill tools, it is related to well drilling tool technical field, including rotary wing stabilizer, rotary wing block and center drill bit, rotary wing stabilizer top surface rotating hole, sliding slot and limiting block;Rotary wing block is slidably connected in sliding slot, and elastic member is tightly arranged between rotary wing block and sliding slot;The end face of rotary wing block towards rotating hole is formed support surface, transition surface and limiting surface in sequence;The rotating shaft of center drill bit is rotatably connected with rotating hole, and the top end of rotating shaft is fixedly sleeved with support disc, the side wall of support disc has protruding support claw, the end face of support claw is in contact with limiting surface, and is clamped and limited by transition surface and limiting block.This application uses centrifugal force to force rotary wing block to slide, cooperates with elastic member to form certain buffer, prevents damage caused by rigid cooperation, at the same time, the rotation of support disc forces rotary wing block to completely unfold, and serves as the final support structure, both ensure the stable rotary wing unfolding structure, and effectively prevent the jamming problem in unfolding process.

Description

Technical Field

[0001] This invention relates to the field of drilling tool technology, and more specifically to an anti-jamming reaming rotary drill bit. Background Technology

[0002] When existing rotary or sliding block reaming drills operate in complex conditions such as dry rock layers and sand layers, the dry rock layers and sand layers cannot provide sufficient compressive force to the drill bit, making it difficult for the rotor or sliding block to open and close. This can easily cause the drill bit to get stuck during operation, leading to premature drill bit failure. When rotary or sliding block reaming drills operate in different methods such as horizontal or inclined operations, the rotor or sliding block on different sides are subjected to different compressive forces, preventing them from opening and closing simultaneously. Uneven force distribution on the rotor or sliding block during operation can also lead to premature drill bit failure. Both of these situations can result in low hole quality, failure to form a hole, or excessively high hole formation costs.

[0003] To overcome the above technical problems, Changsha Tianhe Drilling Machinery Co., Ltd. filed an invention patent application with application number 202010914465.3 entitled "A Hole-Reaming Rotary Drill Tool". The invention includes a rotary stabilizer, a central drill bit, and a rotary block. The central drill bit is coaxially mounted on the rotary stabilizer. The central drill bit and the rotary stabilizer can rotate relative to each other around a rotation center. A circumferential limiting device limits the relative rotation angle between the central drill bit and the rotary stabilizer. An installation gap for mounting the rotary block is provided between the opposing surfaces of the central drill bit and the rotary stabilizer. The rotary block is mounted on the opposing surface of the central drill bit or the rotary stabilizer via a rotary shaft. The axial limiting device of the central drill bit and the rotary stabilizer confines the rotary block within the installation gap. A toggle element linked to the central drill bit or the rotary stabilizer is provided in the middle of the installation gap. This patent allows for flexible rotation of the rotary block, ensures that all rotors can open and retract synchronously, and prevents the rotary block from easily falling off.

[0004] Although the patent has a good action effect, the overall drive relies on the rigid action of the actuating component and the rotor block, which lacks a certain buffering effect. However, rotor drills with buffering function are generally prone to jamming due to their complex structure and insufficient stability.

[0005] Therefore, how to provide a simple and stable reaming rotor drill that can prevent jamming is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides an anti-jamming reaming rotary drill bit, which aims to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A type of anti-jamming reaming rotary drill bit, comprising:

[0009] A rotor stabilizer, wherein the rotor stabilizer has a rotating hole in the center of its top surface, and multiple sliding grooves are evenly formed around the rotating hole on the top surface of the rotor stabilizer, and the same number of limiting blocks as the sliding grooves are evenly fixed on the top surface of the rotor stabilizer;

[0010] The rotor blocks are numbered the same as the number of slide grooves, and are slidably connected to each slide groove. Each rotor block has a slider slidably connected to the slide groove. An elastic element is abutted between the end face of the slider away from the rotation hole and the inner wall of the corresponding slide groove. The end face of the rotor block facing the rotation hole forms a support surface, a transition surface, and a limiting surface in sequence. The distance between the support surface and the rotation hole is less than the distance between the limiting surface and the rotation hole.

[0011] A center drill bit, the shaft of which is rotatably connected to the rotating hole, the drill head of which forms a rotor block action gap with the top surface of the rotor stabilizer, a support plate that fits against the drill head is fixedly sleeved on the top of the shaft, the side wall of the support plate has protruding support claws, the number of support claws is the same as the number of rotor blocks, the end face of the support claw away from the shaft abuts against the limiting surface, and the support claw is clamped and limited by the transition surface and the limiting block.

[0012] Through the above technical solution, the reaming rotary drill provided by this invention generates centrifugal force through the rotation of the rotor stabilizer, forcing the slider of the rotor block to slide within the groove. This forces the elastic element to extend outwards from the rotor block's movement gap. As the rotor block extends, the central drill bit also rotates at a certain angle, causing the support plate to rotate accordingly. The support claw disengages from the limiting surface and ultimately forms an abutment with the support surface, serving as a stable support structure after the rotor block is deployed. The reaming rotary drill provided by this invention utilizes the principle of centrifugal force, combined with the elastic element to create a certain buffering effect, preventing damage caused by rigid contact. Simultaneously, the structure of the support claw helps the rotor block deploy, preventing jamming, and provides stable support after deployment. The overall structure is simple, reliable, and highly stable, effectively overcoming the problems of rotor block jamming and poor movement in existing technologies.

[0013] Preferably, in the above-mentioned anti-jamming reaming rotor drill bit, the end faces of the supporting surface, the limiting surface, and the supporting claw are all arc-shaped surfaces, and the curvature of the end faces of the supporting surface, the limiting surface, and the supporting claw is the same. This invention sets the end faces of the supporting surface, the limiting surface, and the supporting claw as arc-shaped surfaces. When the end face of the supporting claw separates from the limiting surface and crosses the transition surface under the action of centrifugal force, due to the effect of the arc-shaped structure, the end face of the supporting claw can form a sliding fit with the supporting surface. During the rotation of the supporting disk, the end face of the supporting claw can continuously push the supporting surface, causing the rotor block to expand outward, providing better deployment assistance and further preventing the rotor block from jamming.

[0014] Preferably, in the above-mentioned anti-jamming reaming rotor drill bit, the slope of the transition surface is the same as the slope of the contact surface of the support claw. By setting the same slope, a stable mating relationship can be formed between the support claw and the rotor block, ensuring a stable limiting relationship when the rotor block does not need to be deployed.

[0015] Preferably, in the above-mentioned anti-jamming reaming rotary drill bit, the elastic element is a spring. Using a spring results in a simple structure and good reset effect.

[0016] Preferably, in the above-mentioned anti-jamming reaming rotor drill bit, the end face of the slider connected to the spring has a limiting protrusion, and the spring is sleeved on the limiting protrusion. The limiting protrusion is provided to prevent excessive pressure on the spring, and the length of the limiting protrusion also ensures a precise fit between the end face of the support claw and the support surface.

[0017] Preferably, in the above-mentioned anti-jamming reaming rotor drill bit, the two side walls of the slide groove have recessed slide channels, and the two side walls of the slider have protruding slide rails, with the slide rails slidably connected to the slide channels. By setting the slide channels and slide rails, a stable sliding connection can be ensured, preventing the rotor block from dislodging during operation.

[0018] Preferably, in the above-mentioned anti-jamming reaming rotor drill bit, the chute penetrates the side wall of the rotor stabilizer, and the side wall of the rotor stabilizer has a countersunk groove corresponding to the open end of the chute. A sealing block is fastened to the countersunk groove with bolts. Designing the chute as an open structure and achieving a detachable sealing connection through the sealing block facilitates the installation of the rotor block and also makes it easy to disassemble and replace damaged rotor blocks.

[0019] Preferably, in the above-mentioned anti-jamming reaming rotary drill bit, the limiting block is arranged around the support plate and has an arc-shaped limiting surface that fits against the outer wall of the support plate. By setting the arc-shaped limiting surface, a circular limiting groove can be formed on the outside of the support plate by the limiting block, while ensuring the stability of the support plate's rotation, achieving two goals at once.

[0020] Preferably, in the above-mentioned anti-jamming reaming rotary drill bit, the inclined surfaces of the limiting block and the supporting claw have the same inclination. By setting the same inclination, a stable mating relationship can be formed between the supporting claw and the limiting block, ensuring a stable limiting relationship when the support disc does not need to rotate.

[0021] Preferably, in the above-mentioned anti-jamming reaming rotor drill bit, the end of the rotor block away from the rotating hole has an arc-shaped working surface, which can ensure the machining strength of the rotor block during operation.

[0022] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an anti-jamming reaming rotary drill bit, which has the following beneficial effects:

[0023] 1. The reaming rotor drill provided by the present invention first uses centrifugal force to force the rotor block to slide, and at the same time, the rotation of the support plate forces the rotor block to fully unfold, which serves as the final support structure. This ensures a stable rotor unfolding structure and effectively prevents jamming during the unfolding process.

[0024] 2. The reaming rotary drill provided by this invention utilizes the principle of centrifugal force and, in conjunction with elastic elements, forms a certain buffering effect to prevent damage caused by rigid contact.

[0025] 3. The present invention provides matching contact surfaces for the cooperation between the rotor block and the support claw, the cooperation between the support claw and the limiting block, and the cooperation between the limiting block and the support plate, which not only ensures a stable limiting relationship but also makes the movement smoother.

[0026] 4. The rotor block provided by the present invention is easy to install. The slide groove is designed as an open structure and a detachable sealing connection is achieved through the sealing block, which can facilitate the installation of the rotor block and also facilitate the disassembly and replacement of damaged rotor blocks.

[0027] 5. The invention has high overall precision in its fit, and the rotor blocks are easy and sensitive to deploy and retract, resulting in good performance. Attached Figure Description

[0028] 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 The attached figure is a schematic diagram of the external structure of the anti-jamming reaming rotary drill provided by the present invention in the retracted state;

[0030] Figure 2 The attached figure is a schematic diagram of the internal structure of the anti-jamming reaming rotary drill provided by the present invention in its retracted state;

[0031] Figure 3 The attached figure is a schematic diagram of the external structure of the anti-jamming reaming rotary drill provided by the present invention in its deployed state.

[0032] Figure 4 The attached figure is a schematic diagram of the internal structure of the anti-jamming reaming rotary drill provided by the present invention in its deployed state;

[0033] Figure 5 The attached figure is an exploded view of the overall structure of the anti-jamming reaming rotor drill provided by the present invention;

[0034] Figure 6 The attached figure is an exploded view of the sealing block and chute structure provided by the present invention;

[0035] Figure 7 The attached figure is a bottom view of the rotor block provided by the present invention;

[0036] Figure 8 The attached figure is a top view of the rotor block provided by the present invention.

[0037] Figure 9 The attached figure is a schematic diagram of the support disk provided by the present invention.

[0038] in:

[0039] 1-Rotor stabilizer;

[0040] 11-Rotating hole; 12-Slide groove; 121-Slide track; 13-Limiting block; 131-Arc-shaped limiting surface; 14-Sink; 15-Bolt; 16-Sealing block;

[0041] 2-Rotor block;

[0042] 21-Slider; 211-Limiting protrusion; 212-Slide rail; 22-Elastic element; 23-Supporting surface; 24-Transition surface; 25-Limiting surface; 26-Arc-shaped working surface;

[0043] 3-Center drill bit;

[0044] 31-Shaft; 32-Drill head; 33-Rotor block movement clearance; 34-Support plate; 341-Support claw. Detailed Implementation

[0045] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] See appendix Figure 1 and attached Figure 5 This invention discloses an anti-jamming reaming rotary drill bit, comprising:

[0047] Rotor stabilizer 1 has a rotating hole 11 in the center of its top surface. Multiple grooves 12 are evenly distributed around the rotating hole 11 on the top surface of rotor stabilizer 1. Limiting blocks 13, the same number as the grooves 12, are evenly fixed on the top surface of rotor stabilizer 1.

[0048] The rotor blocks 2 are the same number as the slide grooves 12, and are slidably connected to the slide grooves 12 respectively. Each rotor block 2 has a slider 21 that is slidably connected to the slide groove 12. An elastic element 22 is pressed between the end face of the slider 21 away from the rotation hole 11 and the inner wall of the corresponding slide groove 12. The end face of the rotor block 2 facing the rotation hole 11 forms a support surface 23, a transition surface 24 and a limiting surface 25 in sequence. The distance between the support surface 23 and the rotation hole 11 is less than the distance between the limiting surface 25 and the rotation hole 11.

[0049] The center drill bit 3 has a rotating shaft 31 that is rotatably connected to the rotating hole 11. The drill head 32 of the center drill bit 3 forms a rotor block action gap 33 between the top surface of the rotor stabilizer 1 and the drill head 32. A support plate 34 that fits against the drill head 32 is fixedly sleeved on the top of the rotating shaft 31. The side wall of the support plate 34 has protruding support claws 341. The number of support claws 341 is the same as the number of rotor blocks 2. The end face of the support claws 341 away from the rotating shaft 31 abuts against the limiting surface 25, and the support claws 341 are clamped and limited by the transition surface 24 and the limiting block 13.

[0050] See appendix Figure 8 and attached Figure 9 The end faces of the support surface 23, the limiting surface 25 and the support claw 341 are all arc-shaped, and the curvature of the end faces of the support surface 23, the limiting surface 25 and the support claw 341 is the same.

[0051] See appendix Figure 2 and attached Figure 8 The slope of the transition surface 24 is the same as the slope of the mating surface of the support claw 341.

[0052] In this embodiment, the elastic element 22 is a spring.

[0053] See appendix Figure 5 and attached Figure 7 The end face of the slider 21 connected to the spring has a limiting protrusion 211, and the spring is sleeved on the limiting protrusion 211.

[0054] See appendix Figure 6 and attached Figure 7 The two side walls of the slide groove 12 have recessed slide channels 121, and the two side walls of the slider 21 have protruding slide rails 212, which are slidably connected to the slide channels 121.

[0055] To further optimize the above technical solution, the slide 12 penetrates the side wall of the rotor stabilizer 1, and the side wall of the rotor stabilizer 1 has a recess 14 corresponding to the opening end through which the slide 12 penetrates. A sealing block 16 is fastened in the recess 14 by bolts 15.

[0056] See appendix Figure 2 and attached Figure 5 The limiting block 13 is arranged around the support plate 34 and has an arc-shaped limiting surface 131 that fits against the outer wall of the support plate 34.

[0057] To further optimize the above technical solution, the slopes of the inclined surfaces of the limiting block 13 and the support claw 341 that fit together are the same.

[0058] See appendix Figure 8 The end of the rotor block 2 away from the rotating hole 11 has an arc-shaped working surface 26.

[0059] The working principle of the anti-jamming reaming rotary drill provided in this embodiment is as follows:

[0060] See appendix Figure 1 and attached Figure 2 This is a reference diagram of the retracted state of the anti-jamming reaming rotary drill provided in this embodiment. At this time, under the action of the spring, the rotor block 2 retracts into the rotor block action gap 33, the end face of the support claw 341 away from the rotating shaft 31 abuts against the limiting surface 25, and the support claw 341 is clamped and limited between the transition surface 24 and the limiting block 13.

[0061] See appendix Figure 3 and attached Figure 4The reference diagram of the anti-jamming reaming rotary drill bit in this embodiment shows the deployed state. The rotor stabilizer 1 is driven to rotate. Under centrifugal force, the rotor block 2 begins to move outwards from the rotor block action gap 33, and the slider 21 compresses the spring. When the end face of the support claw 341 away from the rotating shaft 31 disengages from the limiting surface 25 and crosses the transition surface 24, it abuts against the support surface 23. Then, under the friction between the drill head 32 and the outside, the drill head 32 rotates in the opposite direction to the rotor stabilizer 1, producing a certain angle of reverse rotation. Then, the end face of the support claw 341 away from the rotating shaft 31 pushes against the support surface 23, continuing to push the rotor block 2 outwards from the rotor block action gap 33 until the limiting protrusion 211 abuts against the wall of the slide groove 12 and stops. At this point, the end face of the support claw 341 away from the rotating shaft 31 abuts against the support surface 23, forming support. The rotor block 2 can deploy quickly and without jamming during rotation.

[0062] When it is time to retract, simply rotate in the opposite direction to disengage the support claw 341 from the support surface 23, and the rotor block 2 will retract under the action of the spring.

[0063] See appendix Figure 6 To be continued Figure 8 To remove the sealing block 16, simply unscrew bolt 15. Then, slide the slider 21 of the rotor block 2 into the groove 12, install the spring on the limiting protrusion 211, and finally tighten the sealing block 16 with bolt 15. When disassembly and replacement are required, simply unscrew bolt 15 to remove the sealing block 16. Then, first remove the rotor block 2 to be replaced from the groove 12, and then install the new rotor block 2. The connection is simple and convenient.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A type of anti-jamming reaming rotary drill, characterized in that, include: The rotor stabilizer (1) has a rotating hole (11) in the center of its top surface. Multiple sliding grooves (12) are evenly opened around the rotating hole (11) on the top surface of the rotor stabilizer (1). The rotor stabilizer (1) has a number of limiting blocks (13) that are the same as the number of sliding grooves (12) evenly fixed on its top surface. The rotor blocks (2) are the same number as the number of the slide grooves (12) and are slidably connected in the slide grooves (12). Each rotor block (2) has a slider (21) that is slidably connected to the slide groove (12). An elastic element (22) is pressed between the end face of the slider (21) away from the rotating hole (11) and the inner wall of the slide groove (12). The end face of the rotor block (2) facing the rotating hole (11) is formed with a support surface (23), a transition surface (24) and a limiting surface (25) in sequence. The distance between the support surface (23) and the rotating hole (11) is less than the distance between the limiting surface (25) and the rotating hole (11). A central drill bit (3) has a rotating shaft (31) rotatably connected to a rotating hole (11). A rotor block action gap (33) is formed between the drill head (32) of the central drill bit (3) and the top surface of the rotor stabilizer (1). A support plate (34) that fits against the drill head (32) is fixedly sleeved on the top of the rotating shaft (31). The side wall of the support plate (34) has protruding support claws (341). The number of support claws (341) is the same as the number of rotor blocks (2). The end face of the support claw (341) away from the rotating shaft (31) abuts against the limiting surface (25). The support claw (341) is clamped and limited by the transition surface (24) and the limiting block (13).

2. The anti-jamming reaming rotary drill bit according to claim 1, characterized in that, The end faces of the support surface (23), the limiting surface (25), and the support claw (341) are all arc-shaped surfaces, and the curvature of the end faces of the support surface (23), the limiting surface (25), and the support claw (341) is the same.

3. The anti-jamming reaming rotary drill bit according to claim 2, characterized in that, The slope of the transition surface (24) is the same as the slope of the mating surface of the support claw (341).

4. The anti-jamming reaming rotary drill bit according to claim 1, characterized in that, The elastic element (22) is a spring.

5. The anti-jamming reaming rotary drill bit according to claim 4, characterized in that, The end face of the slider (21) connected to the spring has a limiting protrusion (211), and the spring is sleeved on the limiting protrusion (211).

6. The anti-jamming reaming rotary drill bit according to claim 1, characterized in that, The two side walls of the slide groove (12) have recessed slides (121), and the two side walls of the slider (21) have protruding slide rails (212), which are slidably connected to the slides (121).

7. The anti-jamming reaming rotary drill bit according to claim 1, characterized in that, The groove (12) passes through the side wall of the rotor stabilizer (1), and the side wall of the rotor stabilizer (1) has a recess (14) corresponding to the opening end of the groove (12). A sealing block (16) is fastened in the recess (14) by bolts (15).

8. The anti-jamming reaming rotary drill bit according to claim 1, characterized in that, The limiting block (13) is arranged around the support plate (34) and has an arc-shaped limiting surface (131) that fits against the outer wall of the support plate (34).

9. A rotary drill bit for preventing jamming and reaming according to claim 8, characterized in that, The slope of the inclined surfaces of the limiting block (13) and the supporting claw (341) that are in contact with each other is the same.

10. The anti-jamming reaming rotary drill bit according to claim 1, characterized in that, The rotor block (2) has an arc-shaped working surface (26) at the end away from the rotating hole (11).

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