Method and apparatus for pressure coring with non-invading gel
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United States of America Patent
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-
Jan 9, 1996
Issued Date -
N/A
app pub date -
Oct 25, 1994
filing date -
Apr 21, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pressure core barrel including an inner tube containing a non-invasive gel for encapsulating a core sample. An anti-whirl core bit is employed, and the core bit and inner tube pilot shoe are configured and arranged to prevent damage to the core from drilling fluid. A special high viscosity, low spurt loss coring fluid is employed in the coring operation. When the encapsulated, pressurized care sample is brought to the surface, pressure is bled off and the core sample's chemical and mechanical integrity are substantially preserved by the gel.
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