Apparatus for raise drilling
    7.
    发明授权
    Apparatus for raise drilling 失效
    钻井装置

    公开(公告)号:US3905430A

    公开(公告)日:1975-09-16

    申请号:US39260273

    申请日:1973-08-29

    CPC classification number: E21D9/1066 E21B7/18 E21B7/28 E21D3/00

    Abstract: An apparatus for forming large diameter shafts between the roof of a mine tunnel and the surface of the earth. A pilot hole is drilled between the surface of the earth and the roof of the mine. A pipe is inserted through a pilot hole to the roof of the mine, and an arm is connected to the lower end of the pipe. The arm has a plurality of jets mounted facing toward the roof and in fluid communication with the inside of the pipe. The upper end of the pipe is connected to a high pressure pump which in turn is connected to a source of fluid, such as water. Apparatus is provided for rotating the upper end of the pipe and for pulling the pipe toward the surface of the earth as the roof is eroded by fluids from the jets impinging on the roof of the mine.

    Abstract translation: 一种用于在矿井隧道的屋顶与地表之间形成大直径轴的装置。 在地球表面和矿山屋顶之间钻一个导孔。 管子通过导孔穿过矿井顶部插入,臂连接到管子的下端。 臂具有面向屋顶安装并与管内部流体连通的多个喷射。 管的上端连接到高压泵,高压泵又连接到诸如水的流体源。 设置用于旋转管道的上端并且用于将管道朝向地球的表面拉动,因为屋顶被来自冲击在矿山顶部上的喷气的流体侵蚀。

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