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    • 2. 发明申请
    • DTH-HAMMER DRILLING DEVICE AND OVERBURDEN DRILLING METHOD
    • DTH-HAMMER钻孔设备和OVERBURDEN钻孔方法
    • WO2006131339A1
    • 2006-12-14
    • PCT/EP2006/005427
    • 2006-06-07
    • GEOMECHANIK WASSER- UND UMWELTTECHNIK GMBHABT, JohannesFLEISCHMANN, Frank
    • ABT, JohannesFLEISCHMANN, Frank
    • E21B21/12E21B7/20E21B33/126
    • E21B33/126E21B7/20E21B10/38E21B21/12
    • The invention relates to a DTH-hammer drilling device, comprising a down-the-hole- (DTH-) hammer (6) with a percussion drill bit (9), a drill pipe (2) with a waste conduit for the cuttings and at least one supply conduit for the flushing medium and a flushing medium supply device, wherein a seal (18) for sealing the borehole against the borehole opening is provided in a fixed distance from the drilling head (6), or wherein a casing tube (12) is connected to the drill bit (9). The invention further relates to an overburden drilling method, comprising rotating a drill bit (9), supplying an energy transfer medium through a drill pipe (2) to the rotating drill bit (9) for transmitting a percussive action thereonto, dragging a casing tube (12) along with the drill bit (9) and flushing away cuttings through the drill pipe (2).
    • 本发明涉及一种DTH锤式钻孔装置,其包括具有冲击钻头(9)的钻孔(DTH-)锤(6),具有用于切屑的废料管道的钻杆(2)和 用于冲洗介质的至少一个供应管道和冲洗介质供应装置,其中用于将井眼密封在钻孔开口处的密封件(18)设置在与钻头(6)固定的距离处,或者其中套管 12)连接到钻头(9)。 本发明还涉及一种覆盖层钻孔方法,包括旋转钻头(9),通过钻杆(2)将能量转移介质提供给旋转的钻头(9)以将冲击动作传递到其上,拖动套管 (12)以及钻头(9)并且通过钻杆(2)冲洗切屑。