发明名称 Drilling rig and drilling method
摘要 The invention relates to a drilling rig and a drilling method, in which the drilling element is caused to rotate and is displaced along a mast by means of a drilling drive, which drilling element has a continuous screw auger disposed below the drilling drive, and an extension, which is connected to the continuous screw auger and extends upwardly through the drilling drive. According to the present invention, a displacement head is disposed between the continuous screw auger and the extension and is adapted to force earth material into the wall of a bore hole.
申请公布号 US2009317194(A1) 申请公布日期 2009.12.24
申请号 US20090457343 申请日期 2009.06.08
申请人 STOETZER ERWIN EMIL;HARTHAUSER WERNER JOSEF 发明人 STOETZER ERWIN EMIL;HARTHAUSER WERNER JOSEF
分类号 E21B7/00;E02D7/00;E21B3/02;E21B7/26;E21B15/00 主分类号 E21B7/00
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