Method of increasing the yield of oil wells
United States Patent 1457479

Inventors:
Wolcott, Edson R.
Publication Date:
06/05/1923
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Assignee:
Wolcott, Edson R.
Primary Class:
166/256
Other Classes:
166/272.100, 166/60
International Classes:
E21B43/24; E21B43/16