Drilling and protecting integrated blowout prevention one-way device

Abstract

The utility model provides a drilling and protecting integrated blowout prevention one-way device, which belongs to the technical field of coal mine safety equipment and comprises a drill rod male head, a one-way duckbill valve and a drill rod female head. The drill rod male head is of a hollow cylindrical structure, external threads are arranged on the outer wall close to the first end, and internal threads are arranged on the inner wall close to the second end. The drill rod female head is of a hollow cylindrical structure, external threads are arranged on the outer wall close to the first end, and internal threads are arranged on the inner wall close to the second end. The external thread of the drill rod female head is connected with the internal thread of the drill rod male head; the one-way duckbill valve is fixedly installed in the drill rod male head and located between the first end of the drill rod male head and the first end of the drill rod female head, the first end of the one-way duckbill valve is an outlet, and the second end of the one-way duckbill valve is an inlet. The device can effectively prevent the mixture of gas and coal in the drill hole from generating reverse flow during gas eruption, and the risk of blockage of the drill rod and the drill bit is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine safety equipment, and specifically discloses a drilling and protecting integrated blowout prevention one-way device. Background Technique

[0002] During the coal mine mining process, with the increase of the mining depth, the gas content and pressure also gradually increase. In the traditional gas drainage drilling process, due to the action of the gas pressure and in-situ stress in the hole, the reverse flow generated by the gas and coal mixture in the hole during gas eruption is likely to block the drill bit and drill pipe, resulting in construction interruption and low efficiency. Content of the Utility Model

[0003] The utility model provides a drilling and protecting integrated blowout prevention one-way device to improve the technical problems described in the background technique.

[0004] The above-mentioned drilling and protecting integrated blowout prevention one-way device includes a male drill pipe head, a one-way duckbill valve, and a female drill pipe head; the male drill pipe head is a hollow cylindrical structure, with an external thread provided on the outer wall near the first end and an internal thread provided on the inner wall near the second end; the female drill pipe head is a hollow cylindrical structure, with an external thread provided on the outer wall near the first end and an internal thread provided on the inner wall near the second end; the external thread of the female drill pipe head is connected to the internal thread of the male drill pipe head; the one-way duckbill valve is fixedly installed inside the male drill pipe head, between the first end of the male drill pipe head and the first end of the female drill pipe head, the first end of the one-way duckbill valve is the outlet, and the second end of the one-way duckbill valve is the inlet.

[0005] In the above-mentioned drilling and protecting integrated blowout prevention one-way device, a pressure ring and a hole-type snap ring are further included; a first installation hole, a second installation hole, and a third installation hole are provided inside the male drill pipe head; the first installation hole, the second installation hole, and the third installation hole are arranged in sequence from the first end to the second end of the male drill pipe head, and the diameters increase in sequence; the one-way duckbill valve includes a first valve body and a second valve body, the first valve body is located inside the first installation hole, the second valve body is located inside the second installation hole, and the second valve body presses the connection surface between the first installation hole and the second installation hole; the pressure ring is installed inside the second installation hole and presses the second valve body; the hole-type snap ring is installed inside the third installation hole and presses the pressure ring.

[0006] In the above-mentioned drilling and protecting integrated blowout prevention one-way device, the opening diameter of the one-way duckbill valve is larger than the diameter of the screen pipe.

[0007] In the above-mentioned drilling and protecting integrated blowout prevention one-way device, the opening diameter of the one-way duckbill valve includes two specifications of 36 mm and 56 mm.

[0008] In the above-mentioned drilling and protecting integrated blowout prevention one-way device, the one-way duckbill valve is a silica gel one-way duckbill valve.

[0009] Compared with the prior art, the utility model has the following beneficial effects.

[0010] ①. Connect the above-mentioned integrated drilling and protection blowout prevention one-way device between the drill bit and the drill pipe. The water flow can pass through the female head of the drill pipe, the one-way duckbill valve, and the male head of the drill pipe. The coal slag water at the bottom of the hole is cut off in the reverse direction, effectively preventing the backflow of the gas and coal mixture in the drill hole during gas eruption, and reducing the risk of blockage of the drill pipe and the drill bit.

[0011] ②. Reduce the shutdown and repetitive labor caused by the blockage of the drill pipe and the drill bit, and improve the construction efficiency.

[0012] ③. The above device can be installed on drill pipes of different specifications and has wide applicability.

[0013] ④. The opening diameter of the one-way duckbill valve is larger than the diameter of the screen pipe, so that the screen pipe can be smoothly lowered, and the screen pipe can be smoothly lowered to protect the hole after drilling. Description of the Drawings

[0014] In order to more clearly illustrate the specific implementation manners of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific implementation manners or the prior art. Obviously, the drawings in the following description are some implementation manners of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a structural schematic diagram of the integrated drilling and protection blowout prevention one-way device.

[0016] In the figure: 1. Male head of the drill pipe; 2. One-way duckbill valve; 3. Pressure ring; 4. Hole retaining circlip; 5. Female head of the drill pipe. Specific Embodiments

[0017] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0018] This embodiment provides an integrated drilling and protection blowout prevention one-way device, which is a new type of blowout prevention and screen pipe (hole protection) one-way device. It is connected to the drill pipe to realize drilling, and includes a male head 1 of the drill pipe, a one-way duckbill valve 2, a pressure ring 3, a hole retaining circlip 4 and a female head 5 of the drill pipe.

[0019] The male drill pipe head 1 is a hollow cylindrical structure. The outer wall near the first end is provided with external threads, and the inner wall near the second end is provided with internal threads. Inside the male drill pipe head 1, there are a first mounting hole, a second mounting hole, and a third mounting hole. The first mounting hole, the second mounting hole, and the third mounting hole are arranged in sequence from the first end to the second end of the male drill pipe head 1, and their diameters increase in sequence.

[0020] The female drill pipe head 5 is a hollow cylindrical structure. The outer wall near the first end is provided with external threads, and the inner wall near the second end is provided with internal threads.

[0021] The external threads of the female drill pipe head 5 are connected to the internal threads of the male drill pipe head 1. The internal threads of the female drill pipe head 5 are connected to the drill pipe, and the external threads of the male drill pipe head 1 are connected to the drill bit.

[0022] The one-way duckbill valve 2 is fixedly installed inside the male drill pipe head 1, between the first end of the male drill pipe head 1 and the first end of the female drill pipe head 5. The first end of the one-way duckbill valve 2 is the outlet, and the second end is the inlet, so that the fluid can only flow from the female drill pipe head 5 to the male drill pipe head 1 and cannot flow in the reverse direction.

[0023] The specific installation method of the one-way duckbill valve 2 is as follows: The one-way duckbill valve 2 includes a first valve body and a second valve body. The first valve body is located inside the first mounting hole, and the second valve body is located inside the second mounting hole. The second valve body presses the connection surface of the first mounting hole and the second mounting hole. The retaining ring 3 is installed inside the second mounting hole to press the second valve body. The hole-type snap ring 4 is installed inside the third mounting hole to press the retaining ring 3.

[0024] The opening diameter of the one-way duckbill valve 2 is larger than the diameter of the screen pipe, so as to smoothly lower the screen pipe and achieve smoothly lowering the screen pipe to protect the hole after drilling. The common specifications of the screen pipe are 32mm and 52mm, and the corresponding opening diameters of the one-way duckbill valve 2 include two specifications of 36mm and 56mm.

[0025] The one-way duckbill valve 2 is a silicone one-way duckbill valve, which has elasticity and realizes the function of opening during forward drilling and closing during reverse hole spraying.

[0026] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drilling and protection integrated blowout preventer one-way device, comprising a drill pipe male head, a one-way duckbill valve and a drill pipe female head; The drill pipe male head is a hollow cylindrical structure, with an external thread provided on the outer wall near the first end and an internal thread provided on the inner wall near the second end; The drill pipe female head is a hollow cylindrical structure, with an external thread provided on the outer wall near the first end and an internal thread provided on the inner wall near the second end; It is characterized in that The external thread of the drill pipe female head is connected to the internal thread of the drill pipe male head; The one-way duckbill valve is fixedly installed in the drill pipe male head, located between the first end of the drill pipe male head and the first end of the drill pipe female head. The first end of the one-way duckbill valve is the outlet, and the second end of the one-way duckbill valve is the inlet.

2. The integrated drilling and protection blowout preventer one-way device according to claim 1, characterized in that It further includes a pressure ring and a hole-type snap ring; A first installation hole, a second installation hole and a third installation hole are provided in the drill pipe male head; The first installation hole, the second installation hole and the third installation hole are arranged in sequence from the first end to the second end of the drill pipe male head, and the diameters increase in sequence; The one-way duckbill valve includes a first valve body and a second valve body. The first valve body is located in the first installation hole, the second valve body is located in the second installation hole, and the second valve body presses the connection surface between the first installation hole and the second installation hole; The pressure ring is installed in the second installation hole and presses the second valve body; The hole-type snap ring is installed in the third installation hole and presses the pressure ring.

3. The integrated drilling and protection blowout preventer one-way device according to claim 2, wherein The opening diameter of the one-way duckbill valve is larger than the diameter of the sieve hole pipe.

4. The integrated drilling and protection blowout preventer one-way device according to claim 3, wherein, The opening diameter of the one-way duckbill valve includes two specifications of 36 mm and 56 mm.

5. The integrated drilling and protection blowout preventer one-way device according to claim 2 or 3, characterized in that, The one-way duckbill valve is a silicone one-way duckbill valve.

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