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Logging-while-coring method and apparatus

United States Patent

7,293,613
November 13, 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 (New York, NY)
11/ 639,551
20070107939
December 15, 2006
STATEMENT AS TO FEDERALLY SPONSORED RESEARCH OR 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.