Apparatus for recovering core samples under pressure
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United States of America Patent
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May 15, 2001
Grant Date -
N/A
app pub date -
Jun 30, 2000
filing date -
Jul 29, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pressure and temperature core sampler comprises a tool for recovering cores specifically enabling the evaluation of methane hydrate resources. Because methane hydrate tends to decompose under conditions of pressure decrease and/or temperature increase as the samples are retrieved to the surface, a coring tool in accordance with the present invention provides a self-contained system for retrieving core samples at or near in situ pressure while cooling the core sample. The coring tool is preferably a wire line retrievable device that provides for nearly continuous coring during the drilling operation.
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