Borehole logging tool cryostat

Details Borehole logging tool cryostat Borehole logging tool cryostat

1980-06-19

1982-01-26

Capossela, Ronald C.

Refrigeration

Refrigeration producer

Evaporator, e.g., heat exchanger

250261, F25B 1900

Patent

active

043121926

ABSTRACT:
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. A rigid tube having similar thermal capacity and similarly pre-cooled to cryogenic temperatures, surrounds but is spaced from the heat sink.

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