Efficient back pressure blowout preventer for underground drilling

Abstract

The utility model discloses an efficient back-pressure blowout preventer for underground drilling, which comprises a connecting pipe connected with drilling equipment, a plurality of water drain pipes arranged on one side of the connecting pipe, a conical necking opening with a big lower part and a small upper part arranged at the upper end of the connecting pipe, and a drill rod of the drilling equipment entering and exiting from the conical necking opening; the blowout preventer is simple in structure, low in cost, convenient to install and use and remarkable in blowout prevention effect.

Description

Technical Field

[0001] The utility model relates to an anti - blowout device with high - efficiency back - pressure for underground drilling, belonging to the technical field of drilling safety in coal mines and similar underground projects. Background Technique

[0002] During the process of underground engineering drilling, especially when drilling in high - pressure aquifers or high - pressure gas layers, due to the extremely high fluid pressure, accidents of high - pressure fluid spraying and injuring people are likely to occur. In order to ensure the safety of construction personnel, effective back - pressure and anti - blowout measures must be taken. However, the existing blowout - prevention devices on the market often have complex structures, high costs, and are inconvenient to install and use.

[0003] Therefore, there is an urgent need for an anti - blowout device with a simple structure, low cost, convenient installation and use, and remarkable anti - blowout effect. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide an anti - blowout device with high - efficiency back - pressure for underground drilling, which has a simple structure, low cost, is convenient to install and use, and has a remarkable anti - blowout effect, and can overcome the deficiencies of the prior art.

[0005] The purpose of the utility model is realized through the following technical solutions:

[0006] The utility model discloses an anti - blowout device with high - efficiency back - pressure for underground drilling, which comprises a connecting pipe connected to a drilling device. A plurality of drain pipes are arranged on one side of the connecting pipe. A tapered constriction with a larger bottom and a smaller top is arranged at the upper end of the connecting pipe, and the drill pipe of the drilling device passes in and out through the tapered constriction.

[0007] In the above, the drain pipes are horizontally installed on one side of the connecting pipe or the water outlet of the drain pipe is installed with a downward inclination.

[0008] In the foregoing, an orifice pipe installed on the rock wall is arranged on the drilling device. Flanges are arranged at the connection ends of the orifice pipe and the connecting pipe, and the orifice pipe and the connecting pipe are connected through the flanges.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] 1. The multiple drain pipes of the utility model play the roles of pressure relief and drainage, guiding the high - pressure fluid to a safe area, and the tapered constriction can effectively block the direct spraying of the high - pressure fluid and force it to change direction, thereby improving the safety of the drilling operation. The structure is simple, the installation is convenient, and the anti - blowout effect is remarkable.

[0011] 2. The drain pipe is horizontally installed on one side of the connecting pipe or the outlet of the drain pipe is installed with a downward slope. With such a structure, a drain outlet is only opened on one side of the connecting pipe, and then the drain pipe is welded, so that it is convenient for workers to operate on the other side; or the drain pipe is installed with a slope on one side of the connecting pipe, making the outlet face downward, which can also improve safety.

[0012] 3. The drilling equipment is provided with an orifice pipe installed on the rock wall. Flanges are provided at the connection ends of the orifice pipe and the connecting pipe, and the orifice pipe and the connecting pipe are connected through the flanges, which facilitates the loading and unloading of the connecting pipe.

[0013] 4. The device has been widely applied in multiple underground engineering drilling projects and achieved remarkable results. The device effectively prevents accidents of high-pressure fluid suddenly spraying out and injuring people during drilling construction, ensuring the safety of drilling construction personnel. At the same time, due to simple processing materials, low cost, and convenient installation and use, it also has high economic benefits and practical value. Specifically: Safety improvement: Through the design of the conical necking and multi-directional drain ports, it effectively prevents the direct spraying and pressure relief of high-pressure fluid, greatly reducing the safety risks of drilling operations. Cost reduction: The processing materials are simple and easy to obtain, and the cost is much lower than that of complex blowout preventers purchased in the market, which is conducive to reducing drilling costs. Efficiency improvement: It is convenient for installation and use, without increasing the workload of construction personnel, which is conducive to improving drilling efficiency. Wide applicability: The device is not only applicable to coal mine drilling operations, but also can be popularized and applied to drilling operations in other similar underground projects.

[0014] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings, where:

[0016] Figure 1 is the front view of the present utility model.

[0017] Figure 2 is the top view of the present utility model.

[0018] Among them, connecting pipe 1; drain pipe 2; conical necking 3; drill pipe 4; orifice pipe 5; flange 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present utility model and not for limiting the protection scope of the present utility model.

[0020] As Figure 1 - Figure 2 shown, a high-efficiency backpressure blowout preventer for underground drilling disclosed by the present utility model includes a connecting pipe 1 connected to a drilling device. A plurality of drain pipes 2 are provided on one side of the connecting pipe 1. A tapered constriction 3 with a larger bottom and a smaller top is provided at the upper end of the connecting pipe 1. The drill pipe 4 of the drilling device passes through the tapered constriction 3. With such a structure, there are no less than two drain pipes 2, and the plurality of drain pipes 2 can play a role in pressure relief and drainage, guiding the high-pressure fluid to a safe area. The tapered constriction 3 can effectively block the direct spraying of the high-pressure fluid and force it to change direction, thereby improving the safety of the drilling operation. This structure is simple, easy to install, and has a remarkable blowout prevention effect.

[0021] The drain pipe 2 is horizontally installed on one side of the connecting pipe 1 or the water outlet of the drain pipe 2 is installed with a downward inclination. With such a structure, only a drain opening is provided on one side of the connecting pipe 1, and then the drain pipe 2 is welded, so that the other side is convenient for workers to operate; or the drain pipe 2 is installed with an inclination on one side of the connecting pipe 1 to make the water outlet face downward, which can also improve safety.

[0022] An orifice pipe 5 installed on the rock wall is provided on the drilling device. Flanges 6 are provided at the connection ends of the orifice pipe 5 and the connecting pipe 1. The orifice pipe 5 and the connecting pipe 1 are connected through the flanges 6. The flanges 6 are connected to the orifice pipe 5 and the connecting pipe 1 by welding respectively. The flanges 6 on the orifice pipe 5 and the connecting pipe 1 are connected by screws and nuts. The flanges 6 facilitate the loading and unloading of the device.

[0023] In terms of technical effects, this device has been widely applied in multiple underground engineering drilling projects and achieved remarkable results. This device is not only applicable to coal mine drilling operations but also can be popularized and applied to drilling operations in other similar underground projects, and has high economic benefits and practical value.

[0024] The above is only a preferred embodiment of the present utility model and does not impose any form of confidentiality restrictions on the present utility model. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical content of the present utility model and the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An efficient backpressure blowout preventer for underground drilling, which comprises a connecting pipe (1) connected to drilling equipment, and is characterized in that, On one side of the connecting pipe (1), a plurality of drain pipes (2) are provided. At the upper end of the connecting pipe (1), a tapered constriction (3) with a larger lower part and a smaller upper part is provided, and the drill pipe (4) of the drilling equipment passes in and out through the tapered constriction (3).

2. The blowout preventer device with high-efficiency backpressure for downhole drilling according to claim 1, characterized in that, The drain pipe (2) is horizontally installed on one side of the connecting pipe (1) or the water outlet of the drain pipe (2) is installed with a downward inclination.

3. The blowout preventer device with high-efficiency backpressure for downhole drilling according to claim 1, characterized in that, On the drilling equipment, an orifice pipe (5) installed on the rock wall is provided. At the connecting ends of the orifice pipe (5) and the connecting pipe (1), flanges (6) are provided, and the orifice pipe (5) and the connecting pipe (1) are connected through the flanges (6).

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