Title:
Oil recovery by steam injection and pressure reduction
United States Patent 3367419


Inventors:
Lookeren, Johannes Van
Application Number:
US48857865A
Publication Date:
02/06/1968
Filing Date:
09/20/1965
Assignee:
SHELL OIL CO
Primary Class:
Other Classes:
166/271, 166/272.3
International Classes:
E21B43/20; E21B43/24
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US Patent References:
Foreign References:
GB511768A1939-08-24