Sonic drilling method and apparatus
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United States of America Patent
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-
May 23, 1995
Grant Date -
N/A
app pub date -
Sep 2, 1994
filing date -
Sep 2, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In combination with resonant sonic earth drilling components, and for particular use in retrieving a core sample in a core barrel seated against an internal shoulder in a sonically driven drill bit, a resilient axial loading device not only urges the bottom of the core barrel into continuous contact with the seat but also cushions the core barrel from the sonic energy in the drill bit, thereby minimizing damage to the core sample.
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