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Patent
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G01V 5/12 (2006.01) E21B 36/00 (2006.01) E21B 47/01 (2006.01) F17C 3/08 (2006.01) G01T 1/24 (2006.01) G01V 5/04 (2006.01)
Patent
CA 1138129
BOREHOLE LOGGING TOOL CRYOSTAT ABSTRACT OF THE INVENTION A borehole logging tool and cryostat therefor to maintain a semiconductor detector at cryogenic temperatures. The cryostat has an elongate single-phase heat sink of solid, thermally conductive material on which the detector is removably mounted. The other end of the heat sink is arranged to receive a liquid cryogen or the cold finger of a helium refrigerator, which is removed before a logging run; the detector being maintained at cryogenic temperatures during the logging run by absorption and retention of heat in the solid, single-phase heat sink.
354500
Schlumberger Canada Limited
Smart & Biggar
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