Drilling rig and drilling method
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United States of America Patent
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-
Dec 4, 2012
Grant Date -
Dec 24, 2009
app pub date -
Jun 8, 2009
filing date -
Jun 13, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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. 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.
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