Drill rod for underground drilling of automatic blowout preventer

Abstract

The utility model discloses an automatic blowout preventer drill rod for tunnel drilling, which relates to the technical field of drill rods for tunnel drilling, and comprises a drill rod main body, the top of the drill rod main body is fixedly connected with a connecting block, a piston piece is fixedly connected in the connecting block, a piston ball is movably connected in the piston piece, and the piston ball is movably connected in the drill rod main body. And a group of holes are formed in the surface of the piston piece. When the drill rod is used for drilling an underground tunnel, fluid can be conveyed into the drill rod main body from the top of the drill rod main body, and the piston ball is pushed to move downwards, so that a group of holes are opened, the fluid can be discharged conveniently, and the drilling effect can be enhanced; the piston ball is pushed to move upwards to block the top of the piston piece and a group of holes by circulating into the drill rod main body, so that the fluid is prevented from being sprayed out of the piston piece, the blowout prevention effect on the drill rod main body is achieved, drilling accidents are avoided, and the drill rod main body can be better used.

Description

Technical Field

[0001] This utility model relates to the field of drill rods for tunnel drilling, specifically an automatic blowout preventer drill rod for tunnel drilling. Background Technology

[0002] Drill rods for tunnel drilling are drilling tools specifically designed for drilling operations within mine tunnels. These drill rods play a vital role in geological exploration, mineral resource extraction, and tunnel construction, helping engineers and geologists obtain underground information, understand geological structures, and provide crucial data for mineral resource extraction.

[0003] Drill rods used for tunnel drilling have many characteristics, such as being made of high-strength alloy steel to ensure their wear resistance and service life; the drill rods are connected by threads or other special joints to ensure the stability and continuity of drilling operations; the surface of the drill rods is usually specially treated to improve their corrosion resistance and extend their service life, which helps to ensure the efficiency and safety of drilling operations.

[0004] Currently, when using drill rods for tunnel drilling, the drill rods need to be placed into the tunnel first, and then drilling is carried out by mechanical rotation. During the drilling process, fluid is simultaneously transported to increase the drilling effect.

[0005] However, when drilling tunnels, the fluid delivery pipeline of the drill rod is independent of the drill rod and cannot work in coordination with the drill rod. Furthermore, during the drilling process, the pressure inside the tunnel may increase, causing the liquid inside the tunnel to spray out through the drill rod, which can easily lead to drilling accidents. Utility Model Content

[0006] Therefore, the purpose of this utility model is to provide an automatic blowout preventer drill rod for tunnel drilling to solve the technical problem.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic blowout preventer for tunnel drilling, comprising a drill rod body, a connecting block fixedly connected to the top of the drill rod body, a piston fixedly connected inside the connecting block, a piston ball movably connected inside the piston, and a set of holes provided on the surface of the piston.

[0008] By adopting the above technical solution, when the drill pipe body enters the tunnel for drilling, fluid can be supplied from the top of the drill pipe body into its interior. This fluid then enters the piston assembly and pushes the piston ball downwards, opening a set of orifices to facilitate fluid discharge and enhance drilling efficiency. Simultaneously, when the pressure inside the tunnel abnormally increases, causing fluid to rush into the drill pipe body and onto the piston assembly, it pushes the piston ball upwards, blocking the top of the piston assembly and the set of orifices. This prevents fluid from gushing out of the piston assembly, thus providing a blowout protection for the drill pipe body and avoiding drilling accidents. Therefore, the drill pipe body can be used more effectively.

[0009] The present invention is further provided that a fixing rod is fixedly connected to the bottom of the piston component.

[0010] By adopting the above technical solution, the piston ball can be prevented from falling out of the piston. At the same time, the design of the fixing rod does not block the bottom of the piston. Therefore, after the fluid used in the tunnel drilling process enters the drill pipe, it pushes the piston ball upward to block the top of the piston and the hole, thereby preventing the fluid from spraying out.

[0011] The present invention is further provided that the connecting block is provided with an internal thread.

[0012] By adopting the above technical solution, an external pipeline device can be connected via an internal thread, thereby allowing water to be supplied to the drill rod body during the drilling process, which can improve the drilling effect.

[0013] The present invention is further configured such that the surface of the drill rod body is provided with external threads.

[0014] By adopting the above technical solution, the drill pipe body can be equipped with appropriate external devices according to the actual situation, which can be connected by external threads, thereby increasing the flexibility of the drill pipe device.

[0015] The present invention is further configured such that the inner wall of the piston component is configured as a structure that is narrow at the top and wide at the bottom, and the piston ball is matched with the position of the wide structure of the inner wall of the piston component.

[0016] By adopting the above technical solution, the piston ball can be driven to move according to the water pressure of the fluid flowing at both ends of the drill pipe body. When fluid is delivered from the top of the drill pipe body and pushes the piston ball downward, a set of holes can be opened, which can facilitate the increase of drilling effect. When fluid is injected from the bottom of the drill pipe body, it can push the piston ball upward, thereby blocking the top of the piston and a set of holes, which can facilitate better blowout prevention.

[0017] The present invention is further provided that the inner wall of the piston component is provided with a rubber layer.

[0018] By adopting the above technical solution, the sealing between the piston and the piston ball can be increased, allowing it to fill the small gaps between the piston and the piston ball, thereby preventing fluid in the tunnel from spraying out from their connection.

[0019] In summary, the present invention has the following main advantages:

[0020] When drilling a tunnel using this invention, fluid can be introduced from the top of the drill rod body into the interior of the drill rod body. This fluid enters the piston and pushes the piston ball downward, opening a set of holes to facilitate fluid discharge and enhance drilling efficiency. Simultaneously, when the pressure inside the tunnel abnormally increases, causing fluid to rush into the drill rod body and onto the piston, it pushes the piston ball upward, blocking the top of the piston and the set of holes, preventing fluid from spraying out of the piston. This provides a blowout prevention function for the drill rod body, avoiding drilling accidents and thus improving the usability of the drill rod body. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention;

[0023] Figure 3 This is a detailed diagram of the internal structure of this utility model;

[0024] Figure 4 This is a cross-sectional view of the internal structure of this utility model.

[0025] In the diagram: 1. Drill rod body; 2. Connecting block; 3. Piston; 4. Piston ball; 5. Fixing rod; 6. Hole; 7. Internal thread; 8. External thread. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] An automatic blowout preventer drill rod for tunnel drilling, such as Figures 1-4As shown, the drill rod body 1 is provided with an external thread 8 on its surface. Therefore, an appropriate external device can be selected according to the actual situation of the tunnel and connected through the external thread 8, which facilitates better use of the drill rod body 1. At the same time, a connecting block 2 is fixedly connected to the top of the drill rod body 1, and an internal thread 7 is provided in the connecting block 2. An external pipe can be connected through the internal thread 7 to deliver fluid into the drill rod body 1, which can improve the drilling effect.

[0029] A piston 3 is then fixedly connected inside the connecting block 2, and a piston ball 4 is movably connected inside the piston 3. A set of holes 6 are provided on the surface of the piston 3. By changing the position of the piston ball 4 inside the piston 3, the top of the piston 3 and the set of holes 6 can be opened and blocked. At the same time, a fixing rod 5 is fixedly connected to the bottom of the piston 3. The fixing rod 5 can prevent the piston ball 4 from falling out of the piston 3 and will not block the bottom of the piston 3. Therefore, the fluid entering the drill pipe body 1 can enter the piston 3, thereby pushing the piston ball 4 to move, and the fluid entering the piston 3 can also be discharged.

[0030] The inner wall of the piston component 3 is designed to be narrow at the top and wide at the bottom, and the piston ball 4 is positioned to match the wide section of the inner wall of the piston component 3. Therefore, the pressure of the fluid flowing into both ends of the drill rod body 1 can push the piston ball 4 to move, thereby changing the position of the piston ball 4. When fluid is delivered from the top of the drill rod body 1, it can push the piston ball 4 downward, causing a set of holes 6 to open and drain, thus increasing the drilling effect. When fluid enters the drill rod body 1 from the tunnel, it pushes the piston ball 4 upward, thereby blocking the top of the piston component 3 and the set of holes 6, thus preventing fluid from gushing out.

[0031] In this embodiment, a rubber layer is provided on the inner wall of the piston component 3, which can increase the sealing between the piston component 3 and the piston ball 4. The rubber layer fills the small gaps at their connection, preventing the backflow of fluid into the drill pipe body 1 from being ejected.

[0032] Therefore, during use, when the drill pipe body 1 enters the tunnel for drilling, fluid can be supplied from the top of the drill pipe body 1 into its interior. This fluid then enters the piston 3 and pushes the piston ball 4 downward, opening a set of holes 6 to facilitate fluid discharge and enhance drilling efficiency. Simultaneously, when the pressure inside the tunnel abnormally increases, causing fluid to flow into the drill pipe body 1 and rush towards the piston 3, it can push the piston ball 4 upward, blocking the top of the piston 3 and the set of holes 6. This prevents fluid from spraying out of the piston 3, thus providing a blowout prevention function for the drill pipe body 1 and avoiding drilling accidents. Therefore, the drill pipe body 1 can be used more effectively.

[0033] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A drill rod for tunnel drilling using an automatic blowout preventer, comprising a drill rod body (1), characterized in that: A connecting block (2) is fixedly connected to the top of the drill rod body (1), a piston component (3) is fixedly connected inside the connecting block (2), a piston ball (4) is movably connected inside the piston component (3), and a set of holes (6) are provided on the surface of the piston component (3).

2. The drill rod for tunnel drilling using the automatic blowout preventer according to claim 1, characterized in that: The bottom of the piston component (3) is fixedly connected to a fixing rod (5).

3. The drill rod for tunnel drilling using the automatic blowout preventer according to claim 1, characterized in that: The connecting block (2) is provided with an internal thread (7).

4. The drill rod for tunnel drilling using the automatic blowout preventer according to claim 1, characterized in that: The surface of the drill rod body (1) is provided with external threads (8).

5. The drill rod for tunnel drilling using the automatic blowout preventer according to claim 1, characterized in that: The inner wall of the piston (3) is configured to be narrow at the top and wide at the bottom, and the piston ball (4) is positioned to match the wide inner wall of the piston (3).

6. The drill rod for tunnel drilling using the automatic blowout preventer according to claim 1, characterized in that: The piston component (3) has a rubber layer on its inner wall.

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