Openable and closable guide drill bit for gas extraction

Abstract

The utility model discloses an openable and closable guide drill bit for gas extraction, which comprises a drill bit body and an opening and closing assembly, the drill bit body is integrally of an integrated structure, a drill bit groove is arranged at the top of the drill bit body, a hollow drill core is arranged inside the drill bit body, the opening and closing assembly is arranged on the inner side of the drill bit groove, and the opening and closing assembly is arranged on the inner side of the hollow drill core. And the opening and closing assembly comprises a fixing shaft, an opening and closing supporting piece, a closing plug, a fixing clamping groove and a semispherical clamping piece, the fixing shaft is arranged on the inner side of the drill bit groove, and the surface of the fixing shaft is rotationally connected with the opening and closing supporting piece. The opening and closing type guide drill bit is adopted for gas extraction, the device can achieve opening and closing of the whole drill bit according to needs through the opening and closing assembly, it is guaranteed that a gas channel is unblocked for a long time after drill lifting and hole forming are conducted, hole wall collapse can be reduced, the hole forming depth and the hole forming rate are improved, and the device reinforces the whole drill bit body through the protection assembly; and therefore, the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco planting, in particular to an openable and closable guide drill bit for gas extraction. Background Art

[0002] Gas extraction involves extracting gas from unmined coal seams or goafs directly to the surface through boreholes or dedicated extraction tunnels, pipelines, vacuum pumps, and other methods for utilization, thus turning a negative impact into a positive one. The primary goal of gas extraction is to reduce gas outbursts during the mining process, prevent gas overshoot and accumulation, and prevent gas explosions and coal-gas outburst accidents. Guide drill bits are essential for gas extraction. With their advanced geosteering technology and real-time monitoring capabilities, guide drill bits play a vital role in gas extraction, improving drilling efficiency and success rates while also enhancing safety and efficiency. Therefore, improvements are needed to address these issues and meet practical application needs. However, existing guide drill bits are prone to hole wall collapse after being pulled out of the drill, compromising the smooth flow of gas extraction channels and efficiency. Furthermore, in complex geological conditions, the drill bits are susceptible to wear and damage, resulting in a short service life and increased replacement costs. Utility Model Content

[0003] The utility model aims to provide an openable and closable guide drill bit for gas extraction, aiming to solve the technical problems in the prior art of easy collapse of the hole wall after the drill is lifted and the short service life of the drill bit.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas extraction adopts an openable and closable guide drill bit, comprising a drill bit body and an opening and closing assembly, the drill bit body as a whole is an integrated structure, and a drill bit groove is provided on the top of the drill bit body, a hollow drill core is provided inside the drill bit body, the opening and closing assembly is arranged on the inner side of the drill bit groove, and the opening and closing assembly includes a fixed shaft, an opening and closing support, a closing plug, a fixed clamping groove and a hemispherical clamping member, the fixed shaft is arranged on the inner side of the drill bit groove, and the surface of the fixed shaft is rotatably connected to the opening and closing support member, the lower surface of the opening and closing support member is installed with a closing plug, and the surface of the closing plug is clamped and connected with the inner side of the upper end of the hollow drill core, and the left end of the lower surface of the opening and closing support member is provided with a fixed clamping groove.

[0005] Preferably, a hemispherical clamping piece is clamped and connected to the inner side of the fixed clamping groove, and the lower surface of the hemispherical clamping piece is connected to the lower surface of the inner side of the drill bit groove.

[0006] Preferably, a hard protrusion is provided on the outer surface of the drill body, and a threaded fixing ring is provided on the upper surface of the drill body.

[0007] Preferably, an inner thread mounting ring is threadedly connected to the outer surface of the threaded fixing ring.

[0008] Preferably, the bottom of the internal thread mounting ring is connected to a drill bit connecting pipe, and the internal thread mounting ring and the drill bit connecting pipe are an integrated structure.

[0009] Preferably, the drill body is a hard metal structure, and a protective component for increasing strength is provided inside the drill body.

[0010] Preferably, the protective component includes a hard inner support tube, a highly elastic weather-resistant protective coating and a metal protective net, and the hard inner support tube is arranged on the inner surface of the drill bit body, the inner surface of the hard inner support tube is provided with a highly elastic weather-resistant protective coating, and the outer surface of the highly elastic weather-resistant protective coating is installed with a metal protective net.

[0011] Preferably, the protection assembly further includes a hard outer support tube and support side wings, and the hard outer support tube is installed on the outer surface of the metal protection net, and support side wings are installed on the upper and lower ends of the outer surface of the hard inner support tube.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the gas extraction device adopts an openable and closable pilot drill bit. By providing an opening and closing assembly, which includes a fixed shaft, an opening and closing support member, a closing plug, a fixed clamping groove, and a hemispherical clamping member, the device can realize the opening and closing of the drill bit as a whole as needed, which not only ensures the long-term unobstructed gas channel after the drill is lifted and the hole is drilled, but also reduces the collapse of the hole wall, thereby improving the hole depth and hole formation rate;

[0013] The gas extraction device adopts an openable and closable guide drill bit. By setting up a protective component including a hard inner support tube, a highly elastic and weather-resistant protective coating and a metal protective net, the protective component also includes a hard outer support tube and supporting side wings, so that the device can strengthen the drill bit body as a whole, making it less prone to damage and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the protective component of the device of the utility model;

[0015] Figure 2 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0016] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the device of the utility model;

[0017] Figure 4 This is a schematic diagram of the exploded structure of the device of the present utility model.

[0018] In the figure: 1. Drill bit body; 2. Drill bit groove; 3. Hollow drill core; 4. Opening and closing assembly; 401. Fixed shaft; 402. Opening and closing support; 403. Closing plug; 404. Fixed clamping groove; 405. Hemispherical clamping piece; 5. Hard protrusion; 6. Threaded fixing ring; 7. Internal thread mounting ring; 8. Drill bit connecting pipe; 9. Protection assembly; 901. Hard inner support tube; 902. High-elastic weather-resistant protective coating; 903. Metal protection net; 904. Hard outer support tube; 905. Support side wings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1 to 4 The utility model provides a technical solution: a gas extraction adopts an openable and closable guide drill bit, comprising a drill body 1 and an opening and closing component 4, the drill body 1 as a whole is an integrated structure, and a drill groove 2 is provided on the top of the drill body 1, a hollow drill core 3 is provided inside the drill body 1, the opening and closing component 4 is arranged on the inner side of the drill groove 2, and the opening and closing component 4 includes a fixed shaft 401, an opening and closing support 402, a closing plug 403, a fixed clamping groove 404 and a hemispherical clamping member 405, the fixed shaft 401 is provided on the inner side of the drill groove 2, and the surface of the fixed shaft 401 is rotatably connected to the opening and closing support 402, the lower surface of the opening and closing support 402 is installed with a closing plug 403, and the surface of the closing plug 403 is clamped and connected with the inner side of the upper end of the hollow drill core 3, and the left end of the lower surface of the opening and closing support 402 is provided with a fixed clamping groove 404.

[0021] When using the gas extraction with an openable and closable pilot drill bit, Figure 1 and Figure 2 As shown, first, through the rotation connection between the opening and closing support member 402 and the fixed shaft 401, the left end of the opening and closing support member 402 can be lifted, so that the right end of the opening and closing support member 402 can rotate around the surface of the fixed shaft 401, thereby driving the closing plug 403 to move out from the inside of the hollow drill core 3, thereby realizing the opening of the entire drill bit, pressing the left end of the opening and closing support member 402, so that the opening and closing support member 402 can be rotated and reset around the fixed shaft 401, and at the same time, the closing plug 403 is engaged with the inner side of the hollow drill core 3, and the opening and closing support member 402 is fixed by the engagement connection between the hemispherical clamping member 405 and the inner side of the fixed clamping groove 404.

[0022] At the same time, the inner side of the fixed clamping groove 404 is clamped and connected with a hemispherical clamping piece 405, and the lower surface of the hemispherical clamping piece 405 is connected to the inner lower surface of the drill groove 2. The outer surface of the drill body 1 is provided with a hard protrusion 5, and the upper surface of the drill body 1 is provided with a threaded fixing ring 6. The outer surface of the threaded fixing ring 6 is threadedly connected with an internal threaded mounting ring 7. The bottom of the internal threaded mounting ring 7 is connected to a drill connecting pipe 8, and the internal threaded mounting ring 7 and the drill connecting pipe 8 are an integrated structure. The drill body 1 is a hard metal structure, and a protective component 9 for improving strength is provided on the inner side of the drill body 1. The protective component 9 includes a hard inner support tube 901, a highly elastic weather-resistant protective coating 902 and a metal protective net 903, and the hard inner support tube 901 is arranged on the inner surface of the drill body 1, the inner surface of the hard inner support tube 901 is provided with a highly elastic weather-resistant protective coating 902, and the outer surface of the highly elastic weather-resistant protective coating 902 is installed with a metal protective net 903, the protective component 9 also includes a hard outer support tube 904 and support side wings 905, and the outer surface of the metal protective net 903 is installed with a hard outer support tube 904, and support side wings 905 are installed at the upper and lower ends of the outer surface of the hard inner support tube 901.

[0023] Through the threaded connection between the internal threaded mounting ring 7 and the outer side of the threaded fixing ring 6, the drill body 1 and the drill connecting tube 8 are quickly connected and installed. The hard inner support tube 901 can improve the support stability of the inner side of the drill body 1. The high-elastic weather-resistant protective coating 902 can improve the corrosion resistance of the inner side of the hard inner support tube 901 and extend its service life. The metal protective net 903 can improve the overall hardness of the drill body 1, thereby improving its impact resistance and making it less prone to breakage or damage. The hard outer support tube 904 supports the stability of the outer side of the drill body 1, and the support flanks 905 support the internal structure, thereby strengthening the drill body 1 as a whole, making it less prone to damage and extending its service life. This is the working principle of the gas extraction using an openable and closable guide drill bit.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas extraction device using an openable and closable pilot drill bit, comprising a drill bit body (1) and an opening and closing assembly (4), characterized in that: The drill bit body (1) is an integrated structure as a whole, and a drill bit groove (2) is provided on the top of the drill bit body (1), and a hollow drill core (3) is provided inside the drill bit body (1). The opening and closing assembly (4) is arranged on the inner side of the drill bit groove (2), and the opening and closing assembly (4) comprises a fixed shaft (401), an opening and closing support (402), a closing plug (403), a fixed clamping groove (404) and a hemispherical clamping member (405). The fixed shaft (401) is arranged on the inner side of the drill bit groove (2), and the surface of the fixed shaft (401) is rotatably connected to the opening and closing support (402). The lower surface of the opening and closing support (402) is provided with a closing plug (403), and the surface of the closing plug (403) is clamped and connected with the inner side of the upper end of the hollow drill core (3). The left end of the lower surface of the opening and closing support (402) is provided with a fixed clamping groove (404).

2. A gas extraction method using an openable and closable pilot drill according to claim 1, characterized in that: A hemispherical clamping piece (405) is clamped and connected to the inner side of the fixed clamping groove (404), and the lower surface of the hemispherical clamping piece (405) is connected to the lower surface of the inner side of the drill bit groove (2).

3. The gas extraction method according to claim 1, wherein the openable and closable pilot drill bit is characterized in that: The outer surface of the drill body (1) is provided with a hard protrusion (5), and the upper surface of the drill body (1) is provided with a threaded fixing ring (6).

4. A gas extraction method using an openable and closable pilot drill according to claim 3, characterized in that: The outer surface of the threaded fixing ring (6) is threadedly connected to an internal threaded mounting ring (7).

5. The gas extraction method according to claim 4 is characterized in that: The bottom of the internal thread mounting ring (7) is connected to a drill bit connecting pipe (8), and the internal thread mounting ring (7) and the drill bit connecting pipe (8) are an integrated structure.

6. The gas extraction method according to claim 1, wherein the openable and closable pilot drill bit is characterized in that: The drill bit body (1) is a hard metal structure, and a protective component (9) for increasing strength is provided on the inner side of the drill bit body (1).

7. A gas extraction method using an openable and closable pilot drill according to claim 6, characterized in that: The protective assembly (9) comprises a hard inner support tube (901), a highly elastic weather-resistant protective coating (902) and a metal protective net (903), wherein the hard inner support tube (901) is arranged on the inner surface of the drill bit body (1), the highly elastic weather-resistant protective coating (902) is arranged on the inner surface of the hard inner support tube (901), and the metal protective net (903) is installed on the outer surface of the highly elastic weather-resistant protective coating (902).

8. The gas extraction method according to claim 7, wherein the openable and closable pilot drill bit is characterized in that: The protection assembly (9) further comprises a hard outer support cylinder (904) and support wings (905), and the outer surface of the metal protection net (903) is mounted with the hard outer support cylinder (904), and the outer surface of the hard inner support cylinder (901) is mounted with support wings (905) at both upper and lower ends.

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