Oil production
United States Patent 2214064

Inventors:
Niles, Joseph A.
Publication Date:
09/10/1940
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Assignee:
STANOLIND OIL & GAS CO
Primary Class:
166/54
Other Classes:
417/249, 116/106, 210/114, 210/123, 166/115, 210/532.100, 417/251
International Classes:
E21B43/12; E21B43/38; E21B43/34