Refrigeration – Refrigeration producer – Evaporator – e.g. – heat exchanger
Patent
1985-02-27
1987-04-21
Capossela, Ronald C.
Refrigeration
Refrigeration producer
Evaporator, e.g., heat exchanger
250352, F25B 1900
Patent
active
046586016
ABSTRACT:
A cryogenic cell comprises a sealed external annular chamber, adapted to be maintained under vacuum which chamber surrounds a heat shield. A section of the shield is exposed and is adapted to make contact with a closed cycle cooler. The shield encloses a sealed inner chamber adapted for the storage of a solid/liquid refrigerant. The shield has a relatively thin base and sidewall and the section which is exposed is a relatively thick upper collar which has a well leading to the top of the inner chamber immediately above and in contact with the top of the inner chamber. The inner chamber is connected at its lower end to a section containing an absorbent and the latter section is connected at its lower end to a further chamber suitable for the reception of a gamma radiation detector. The cryogenic cell is suitable for keeping the semi-conductor detector of a neutron borehole logging tool at the required low temperature.
REFERENCES:
patent: 3258602 (1966-06-01), Promish
patent: 3435629 (1969-04-01), Hallenberg
patent: 3702932 (1972-11-01), Tanner et al.
patent: 4241592 (1980-12-01), Tapphorn
patent: 4312192 (1982-01-01), Zarudiansky et al.
patent: 4313317 (1982-02-01), Janssen et al.
patent: 4340405 (1982-07-01), Steyert Jr. et al.
patent: 4375157 (1983-03-01), Boesen
Burchell Steven P.
Kerley Nicholas W.
Mellor David W.
Capossela Ronald C.
The British Petroleum Company p.l.c.
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