Drilling tool
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United States of America Patent
Stats
-
Sep 20, 2011
Grant Date -
Jul 2, 2009
app pub date -
Apr 4, 2007
filing date -
Apr 6, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a drilling tool comprising: two pairs of rotary drums in axial alignment on parallel axes; a motor mechanism for driving rotation of the drums; a support element; and a support structure on which the drums are mounted to rotate and serving to connect the drums to the support element; the tool being characterized in that the motor mechanism is mounted inside the drums and in that the support structure comprises a plate forming bearings at its bottom ends for the drums; and a mounting pad for fastening to the support element.
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