Method and device for boring holes in soil or rock
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United States of America Patent
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Mar 27, 2007
Issued Date -
N/A
app pub date -
Apr 3, 2006
filing date -
Oct 1, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method and device for boring or drilling, in particular percussion drilling or rotary percussion drilling, holes in soil or rock, wherein a borehole is formed by a percussive and/or rotary movement carried out by a drill bit (2) mounted on a drill rod assembly (3) and a jacket tube (6) coupled with the drill bit (2) is introduced into the borehole, it is provided that the jacket tube (6) is received in a socket (5) provided on the end facing away from the drill bit working surface, of an envelope tube (4) coupled with the drill bit (2), and that the jacket tube (6) is subjected to a percussive and/or compressive stress on its end facing away from the drill bit, whereby directionally precise boring or drilling is rendered feasible.
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