Device for cleaning well perforations
United States Patent 2816612
US Patent References:
Method of and apparatus for treating wells
- - 2437456

Earth boring apparatus
- - 2554005


Inventors:
Hutchison, John S.
Freeman Jr., William A.
Publication Date:
12/17/1957
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Assignee:
EXXON RESEARCH ENGINEERING CO
Primary Class:
166/177.600
Other Classes:
166/173
International Classes:
E21B37/08; E21B37/00