Device for washing oil wells
United States Patent 1436058

Inventors:
Smith, Edward D.
Tillery, Smith Rebah
Publication Date:
11/21/1922
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Assignee:
Theodore, Guy E.
Primary Class:
166/57
Other Classes:
166/222, 137/543.150, 239/453, 166/325
International Classes:
E21B43/24; E21B43/16