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Logging-while-coring method and apparatus

United States Patent

January 30, 2007
View the Complete Patent at the US Patent & Trademark Office
A method and apparatus for downhole coring while receiving logging-while-drilling tool data. The apparatus includes core collar and a retrievable core barrel. The retrievable core barrel receives core from a borehole which is sent to the surface for analysis via wireline and latching tool The core collar includes logging-while-drilling tools for the simultaneous measurement of formation properties during the core excavation process. Examples of logging-while-drilling tools include nuclear sensors, resistivity sensors, gamma ray sensors, and bit resistivity sensors. The disclosed method allows for precise core-log depth calibration and core orientation within a single borehole, and without at pipe trip, providing both time saving and unique scientific advantages.
Goldberg; David S. (New York, NY), Myers; Gregory J. (Cornwall, NY)
The Trustees of Columbia University in the City of New York (New York, NY)
10/ 850,691
May 21, 2004
STATEMENT AS TO FEDERALLY SPONSORED RESEARCH OF DEVELOPMENT The invention described herein was made at least in part with U.S. government support under Contract No. JSC 2-94, which was awarded by the U.S. National Science Foundation to Joint Ocean Institutions, Inc. and subcontracted to the assignee and under Contract No. JSC 2-06, which was awarded by the U.S. Department of Energy to Joint Ocean Institutions, Inc. and subcontracted to the assignee. Accordingly, the government may have certain rights in the subject invention.