Novel sinking and driving engineering freezing drill pipe

Abstract

The invention provides a novel sinking and driving engineering freezing drill pipe. The novel sinking and driving engineering freezing drill pipe comprises a water supply pipe and a freezing pipe, andwater in the water supply pipe is controlled by a water supply pipe opening and a water supply pipe gate valve. A dill bit is arranged on the end portion of the freezing pipe, and the drill bit is composed of a high-strength drilled core and a drill pipe body. A non-return gate valve outer pipe clamp covers the freezing pipe, a non-return gate valve inner pipe clamp is connected with a non-returngate valve through the connection of an outer pipe fixing bolt, and the non-return gate valve is connected with a non-return gate valve switch. The opening of a non-return device is controlled by thenon-return gate valve switch, and the drill bit passes through a roadway concrete formation. The novel sinking and driving engineering freezing drill pipe combines the freezing pipe and the drill pipe body into one, the process of completing the installation of a drill hole and the freezing pipe is formed, the purpose that freezing pipe can be frozen while drilling the drill pipe body is realizedin the construction process of a freezing method, a traditional construction technology is changed, the work efficiency is improved, and the structural safety of a well wall of a roadway is ensured.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a novel frozen drill pipe for tunnel engineering. Background technique [0002] With the increase of mine freezing depth, the application of deep hole drilling is more and more extensive. However, in deep hole drilling, the problem of large borehole deflection caused by the increase of ground pressure caused by borehole shrinkage and collapse, and the increase of drill pipe length after drilling depth is becoming more and more obvious. If the traditional construction method is used, the installation of ground fixed equipment, selection of drilling tools, construction technology, inclination measurement and correction of boreholes, mud wall protection, etc. should be designed during the construction process. The construction technology of the shaft wall is sometimes difficult to ensure the safety of the shaft structure, and the construction period is long. [0003] Th...

AI Technical Summary

Problems solved by technology

However, in deep hole drilling, the problem of large borehole deflection caused by the increase of ground pressure caused by the shrinkage of the borehole, the collapse of the hole, and the increase in the length of the drill pipe after the depth of the borehole increases is also becoming more and more obvious.

If the traditional construction method is used, the installation of ground fixed equipment, selection of drilling tools, construction technology, inclination measurement and correction of boreholes, mud wall protection, etc. should be designed during the construction process. The construction technology of the shaft wall is sometimes difficult to ensure the safety of the shaft structure, and the construction period is longer

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