A new large-diameter drilling pressure-relief device beneficial to rapid drilling

Abstract

This invention discloses a novel large-diameter drilling pressure relief device for rapid drilling, comprising a hydraulic telescopic drill bit, a powder-absorbing drill rod that rotates with the hydraulic telescopic drill bit, and a water injection pipe fitted over the powder-absorbing drill rod. The powder-absorbing drill rod has several powder-absorbing holes at its end near the hydraulic telescopic drill bit, which connect to the water injection pipe. A blower is installed on the inner side of the end of the powder-absorbing drill rod away from the hydraulic telescopic drill bit, and the powder-absorbing drill rod is connected to the top inlet of a storage tank. The end of the water injection pipe away from the hydraulic telescopic drill bit is connected to the outlet of a high-pressure water pump, and the inlet of the high-pressure water pump is connected to a water storage chamber. Several water injection holes are provided at the end of the water injection pipe near the hydraulic telescopic drill bit. This invention can absorb coal powder both during drilling and when drilling stops. Furthermore, when absorbing coal powder, the drilling pressure relief device does not need to be removed from the borehole, saving time and effort compared to existing technologies and improving drilling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of drilling equipment technology, specifically relating to a novel large-diameter drilling pressure relief device that facilitates rapid drilling. Background Technology

[0002] During coal mine operations, coal dust generated in the coal seam is a significant problem during the pressure relief process of large-diameter drilling. Firstly, coal dust is an abrasive substance that causes wear on the drill bit and drill rod, especially during dry drilling, where the lack of water lubrication and cooling exacerbates wear. This wear not only affects drilling efficiency but can also lead to equipment damage and increased maintenance costs. Secondly, if coal dust is not promptly removed during drilling, it can accumulate around the drill bit and drill rod, causing equipment jamming and malfunction.

[0003] Given the impact of coal dust, the current solution is usually to suspend drilling operations, remove the drilling equipment from the borehole, and then clean up the coal dust.

[0004] The existing method requires removing the drilling equipment from the borehole before processing pulverized coal, which is time-consuming and labor-intensive, increasing the workload of workers and affecting drilling efficiency.

[0005] To address the above issues, this application proposes a novel large-diameter drilling pressure relief device that facilitates rapid drilling. When coal powder needs to be processed, the drilling pressure relief device of this application does not need to be removed from the borehole. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new type of large-diameter drilling pressure relief device that facilitates rapid drilling.

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

[0008] A novel large-diameter drilling and pressure relief device that facilitates rapid drilling includes a hydraulic telescopic drill bit, a powder-absorbing drill rod that rotates with the hydraulic telescopic drill bit, and a water injection pipe fitted over the powder-absorbing drill rod.

[0009] The powder-absorbing drill rod is open at one end near the hydraulic telescopic drill bit and sealed at the other end away from the hydraulic telescopic drill bit; several powder-absorbing holes are provided at the end of the powder-absorbing drill rod near the hydraulic telescopic drill bit, and the powder-absorbing holes are connected to a water injection pipe along the radial direction of the powder-absorbing drill rod; a blower is provided on the inner side of the end of the powder-absorbing drill rod away from the hydraulic telescopic drill bit; the powder-absorbing drill rod between the powder-absorbing holes and the blower is connected to the top inlet of the storage tank; a filter assembly is provided inside the storage tank, and the filter assembly divides the inner cavity of the storage tank into an upper powder storage chamber and a lower water storage chamber;

[0010] The water injection pipe is sealed at one end near the hydraulic telescopic drill bit and connected to the outlet of the high-pressure water pump at the other end away from the hydraulic telescopic drill bit. The inlet of the high-pressure water pump is connected to the water storage chamber. Several water injection holes are provided at the end of the water injection pipe near the hydraulic telescopic drill bit.

[0011] Preferably, the hydraulic telescopic drill bit includes a rectangular drill cavity, and the drilling end of the rectangular drill cavity is provided with two drill cutting edges, which are symmetrically arranged;

[0012] The drill bit engages with the wall of the rectangular drill cavity through a rotational fit;

[0013] Each drill bit is connected to the piston rod of a corresponding hydraulic cylinder, which is fixedly installed inside a rectangular drill cavity;

[0014] Two hydraulic cylinders control the rotation of two drill bits to achieve the closing and opening of the rectangular drill cavity.

[0015] Preferably, the upper part of the end face of the drill bit facing the rectangular drill cavity is rotatably fitted with a rotating shaft, and the rotating shaft is fixedly connected to the cavity wall of the rectangular drill cavity.

[0016] Preferably, the piston rod end of the hydraulic cylinder is hinged with a connecting ball;

[0017] The back of the drill bit is provided with a groove for the corresponding connecting ball to slide.

[0018] Preferably, the filtering component is a filter screen.

[0019] Preferably, a waterproof valve is installed inside the powder suction drill rod between the storage tank and the blower.

[0020] Preferably, the waterproof valve is a solenoid valve.

[0021] Preferably, a dustproof mesh cover is installed inside the powder-absorbing drill rod between the storage tank and the waterproof valve.

[0022] The beneficial effects of this invention are:

[0023] This invention relates to a drilling pressure relief device. Through its overall structural design, during drilling, the powder suction hole and the powder suction drill rod form a coal powder suction channel, which, under the action of a blower, draws the coal powder into a storage tank. When drilling stops, the drill bit rotates to form a through hole. The through hole, the rectangular drill cavity, the open end of the powder suction drill rod, and the powder suction drill rod form a first coal powder suction channel, while the powder suction hole and the powder suction drill rod form a second coal powder suction channel. Under the water pressure of a high-pressure water pump, a mixture of coal powder and water is transported to the storage tank. Therefore, this application can achieve coal powder suction both during drilling and when drilling stops. Moreover, when suctioning coal powder, the drilling pressure relief device of this application does not need to be removed from the borehole. Compared with the prior art, this saves time and effort and improves drilling efficiency. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0025] Figure 1 This is a schematic diagram of the structure of the novel large-diameter drilling and pressure relief device of the present invention, which facilitates rapid drilling;

[0026] Figure 2 This is a schematic diagram of the hydraulic telescopic drill bit in the drilling process of this invention;

[0027] Figure 3 This is a schematic diagram of the structure of the hydraulic telescopic drill bit after the drill bit rotates in this invention;

[0028] Figure 4 This is a schematic diagram of the structure of the hydraulic telescopic drill bit after drilling is completed in this invention;

[0029] Figure 5 This is a schematic diagram of the structure of the filter component in this invention;

[0030] Figure 6 This is a schematic diagram of the dustproof mesh cover in this invention;

[0031] Figure 7 This is a schematic diagram of the structure of the novel large-diameter drilling and pressure relief device of the present invention, which facilitates rapid drilling, during drilling in a coal seam;

[0032] Figure 8 This is a schematic diagram of the structure of the novel large-diameter drilling and pressure relief device of the present invention, which facilitates rapid drilling, when drilling is stopped in a coal seam;

[0033] in:

[0034] 1-Hydraulic telescopic drill bit, 11-Rectangular drill cavity, 12-Drill bit, 121-Rotating shaft, 122-Slot, 13-Hydraulic cylinder, 14-Through hole, 15-Connecting ball;

[0035] 2-Powder suction drill rod, 21-Powder suction hole, 22-Open end;

[0036] 3-Water injection pipe, 31-Water injection hole,

[0037] 4-Storage tank, 41-Filter assembly, 42-Powder storage chamber, 43-Water storage chamber;

[0038] 5-High-pressure water pump;

[0039] 6-Fan, 7-Waterproof valve, 8-Dustproof mesh cover. Detailed Implementation

[0040] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements of this invention, and do not specifically refer to any component or element in this invention, and should not be construed as limiting this invention.

[0043] In this invention, terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0045] like Figure 1 As shown, a novel large-diameter drilling and pressure relief device that facilitates rapid drilling includes a hydraulic telescopic drill bit 1, a powder-absorbing drill rod 2 that rotates with the hydraulic telescopic drill bit 1, and a water injection pipe 3 that is sleeved on the outside of the powder-absorbing drill rod 2.

[0046] The powder-absorbing drill rod 2 is open at one end near the hydraulic telescopic drill bit 1 and sealed at the other end away from the hydraulic telescopic drill bit 1, wherein the open end 22 of the powder-absorbing drill rod 2 forms a large powder-absorbing hole; the powder-absorbing drill rod 2 is provided with several powder-absorbing holes 21 at the end near the hydraulic telescopic drill bit 1, and the powder-absorbing holes 21 penetrate the water injection pipe 3 radially along the powder-absorbing drill rod 2; a blower 6 is provided on the inner side of the end of the powder-absorbing drill rod 2 away from the hydraulic telescopic drill bit 1; the powder-absorbing drill rod 2 between the powder-absorbing holes 21 and the blower 6 is connected to the top inlet of the storage tank 4; a filter assembly 41 is provided inside the storage tank 4, and the filter assembly 41 divides the inner cavity of the storage tank 4 into an upper powder storage chamber 42 and a lower water storage chamber 43;

[0047] The end of the water injection pipe 3 near the hydraulic telescopic drill bit 1 is blocked, and the end away from the hydraulic telescopic drill bit 1 is connected to the outlet of the high-pressure water pump 5. The inlet of the high-pressure water pump 5 is connected to the water storage chamber 43. Several water injection holes 31 are provided at the end of the water injection pipe 3 near the hydraulic telescopic drill bit 1.

[0048] Preferred, such as Figure 2-4 As shown, the hydraulic telescopic drill bit 1 includes a rectangular drill cavity 11, and the drilling end of the rectangular drill cavity 11 is provided with two drill edges 12, which are symmetrically arranged.

[0049] The drill bit 12 rotates with the cavity wall of the rectangular drill cavity 11;

[0050] Each drill bit 12 is connected to the piston rod of a corresponding hydraulic cylinder 13, which is fixedly installed inside a rectangular drill cavity 11;

[0051] Two hydraulic cylinders 13 control the rotation of two drill bits 12 to achieve the closing and opening of the rectangular drill cavity 11.

[0052] In this application, when the hydraulic telescopic drill bit 1 rotates for drilling, if Figure 2 As shown, the two drill bits 12 rotate to the contact state, thereby closing the rectangular drill cavity 11;

[0053] When drilling is complete and coal dust needs to be removed, the piston rod of the hydraulic cylinder 13 retracts, causing the drill bit 12 to rotate into the rectangular drill cavity 11, so that the two drill bits 12 are no longer in contact, forming a through hole 14 between the two drill bits 12, connecting the rectangular drill cavity 11 to the outside. Figure 4 As shown, this forms a channel for pulverized coal absorption.

[0054] Preferably, the upper part of the end face of the drill bit 12 facing the rectangular drill cavity 11 is rotatably fitted with a rotating shaft 121, and the rotating shaft 121 is fixedly connected to the cavity wall of the rectangular drill cavity 11.

[0055] Preferably, the piston rod end of the hydraulic cylinder 13 is hinged with a connecting ball 15;

[0056] The back of the drill bit 12 is provided with a slot 122 for the corresponding connecting ball 15 to slide.

[0057] When the piston rod of the hydraulic cylinder 13 extends or retracts, the drill bit 12 rotates around the rotating shaft 121 through the sliding engagement of the connecting ball 15 and the slot 122.

[0058] Preferably, the filter component 41 is a filter screen, with the structure as follows: Figure 5As shown, filter screens with different pore diameters can be used according to different working environments. During liquid filtration, gravity allows the liquid to flow naturally through the filter screen, reducing the possibility of clogging and also lowering the pump's workload. The filter screen and storage tank 4 are connected by a slot, making filter screen replacement and cleaning simple and convenient, greatly shortening the workflow, improving work efficiency, and achieving optimal filtration results.

[0059] Preferably, a waterproof valve 7 is installed inside the powder suction drill rod 2 between the storage tank 4 and the fan 6.

[0060] Preferably, the waterproof valve 7 is a solenoid valve.

[0061] Preferably, a dustproof mesh cover 8 is installed inside the powder-absorbing drill rod 2 between the storage tank 4 and the waterproof valve 7.

[0062] In this application, the dustproof mesh cover 8 achieves ventilation and dustproof functions, and its structure is as follows: Figure 6 As shown, the dustproof netting is made of plastic material, which can be easily folded or rolled up, making it easy to carry and install.

[0063] A novel large-diameter drilling and pressure relief device that facilitates rapid drilling is described in the following specific implementation method:

[0064] like Figure 7 As shown, during the drilling operation, the two drill bits 12 are connected, the rectangular drill cavity 11 is closed, the waterproof valve 7 is in the open state, and the blower 6 inside the borehole works continuously, sucking the coal powder generated in the borehole into the dust suction drill rod 2 through the dust suction hole 21 of the water injection pipe 3. Due to the obstruction of the dustproof net cover 7, it is deposited in the dust storage cavity 42.

[0065] like Figure 8As shown, when the drilling reaches a certain depth, the rotation of the hydraulic telescopic drill bit 1 is stopped, the blower 6 and the waterproof valve 7 are turned off, and then the piston rod of the hydraulic cylinder 13 is controlled to retract. Through the cooperation of the connecting ball 15 and the slot 122, the drill bit 12 is driven to rotate into the rectangular drill cavity 11, so that the two drill bits 12 are no longer in contact. A through hole 14 is formed between the two drill bits 12, connecting the rectangular drill cavity 11 and the outside, thus forming a channel for pulverized coal to be absorbed. At the same time, the high-pressure water pump 5 is turned on to inject water into the drill hole through the water injection pipe 3 and the water injection hole 31. Water is injected, and the coal dust and water in the borehole form a mixture. Under the action of high-pressure water, part of the mixture enters the suction drill rod 2 through the through hole 14, the rectangular drill cavity 11, and the open end 22 of the suction drill rod 2. The other part of the mixture enters the suction drill rod 2 through the suction hole 21 of the water injection pipe 3. The closure of the waterproof valve 7 allows the mixture in the suction drill rod 2 to enter the storage tank 4. The filter assembly 41 in the storage tank 4 keeps the coal dust in the dust storage chamber 42, while the water falls into the water storage chamber 43. The high-pressure water pump 5 can transport the water in the water storage chamber 43 to the water injection pipe 3, which then enters the borehole through the water injection hole 31, thus realizing the recycling of water. When the dust storage chamber 42 is full, a new storage tank 4 is replaced.

[0066] During the drilling process, the coal powder suction hole 21 and the coal powder suction drill rod 2 form a coal powder suction channel, which is drawn into the storage tank 4 by the blower 6. When drilling stops, the drill bit 12 rotates to form a through hole 14. The through hole 14, the rectangular drill cavity 11, the open end 22 of the coal powder suction drill rod, and the coal powder suction drill rod 2 form the first coal powder suction channel, and the coal powder suction hole 21 and the coal powder suction drill rod 2 form the second coal powder suction channel. Under the water pressure of the high-pressure water pump 5, the mixture of coal powder and water is transported to the storage tank 4. Therefore, this application can achieve coal powder suction both during drilling and when drilling stops. Moreover, when suctioning coal powder, the drilling pressure relief device of this application does not need to be removed from the borehole. Compared with the prior art, it saves time and effort and improves drilling efficiency.

[0067] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are not intended to limit the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A new type of large diameter borehole pressure relief device that facilitates fast drilling, characterized by, Includes a hydraulic telescopic drill bit, a powder-absorbing drill rod that rotates with the hydraulic telescopic drill bit, and a water injection pipe fitted over the powder-absorbing drill rod; The powder-absorbing drill rod is open at one end near the hydraulic telescopic drill bit and sealed at the other end away from the hydraulic telescopic drill bit; several powder-absorbing holes are provided at the end of the powder-absorbing drill rod near the hydraulic telescopic drill bit, and the powder-absorbing holes are connected to a water injection pipe along the radial direction of the powder-absorbing drill rod; a blower is provided on the inner side of the end of the powder-absorbing drill rod away from the hydraulic telescopic drill bit; the powder-absorbing drill rod between the powder-absorbing holes and the blower is connected to the top inlet of the storage tank; a filter assembly is provided inside the storage tank, and the filter assembly divides the inner cavity of the storage tank into an upper powder storage chamber and a lower water storage chamber; The water injection pipe is sealed at one end near the hydraulic telescopic drill bit and connected to the outlet of the high-pressure water pump at the other end away from the hydraulic telescopic drill bit. The inlet of the high-pressure water pump is connected to the water storage chamber. Several water injection holes are provided at the end of the water injection pipe near the hydraulic telescopic drill bit. The hydraulic telescopic drill bit includes a rectangular drill cavity, and the drilling end of the rectangular drill cavity is provided with two drill edges, which are symmetrically arranged. The drill bit engages with the wall of the rectangular drill cavity through a rotational fit; Each drill bit is connected to the piston rod of a corresponding hydraulic cylinder, which is fixedly installed inside a rectangular drill cavity; Two hydraulic cylinders control the rotation of two drill bits to achieve the closing and opening of the rectangular drill cavity; The upper part of the end face of the drill bit facing the rectangular drill cavity is rotatably fitted with a rotating shaft, and the rotating shaft is fixedly connected to the cavity wall of the rectangular drill cavity. The piston rod end of the hydraulic cylinder is hinged with a connecting ball; The back of the drill bit is provided with a groove for the corresponding connecting ball to slide.

2. The novel large diameter borehole pressure-relief apparatus for facilitating rapid drilling as claimed in claim 1, wherein, The filtering component is a filter screen.

3. The novel large diameter borehole pressure-relief apparatus for facilitating rapid drilling as claimed in claim 1 wherein, A waterproof valve is installed inside the dust-absorbing drill rod between the storage tank and the blower.

4. The novel large-diameter drilling and pressure relief device for rapid drilling as described in claim 3, characterized in that, The waterproof valve is a solenoid valve.

5. The novel large diameter borehole pressure-relief apparatus for facilitating rapid drilling as claimed in claim 3 wherein, A dustproof mesh cover is installed inside the powder-absorbing drill rod between the storage tank and the waterproof valve.

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