Process of removing viscous oil from a well bore
United States Patent 2819761

Inventors:
Popham, Jack L.
Shock, Arcy D. A.
Publication Date:
01/14/1958
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Assignee:
CONTINENTAL OIL CO
Primary Class:
Other Classes:
166/259
International Classes:
E21B36/00; E21B43/247; E21B43/16
Foreign References:
CA481151A