Title:
Selective perforation and directional fracturing
United States Patent 3419070


Inventors:
Ernst, Edward A.
Application Number:
US51603865A
Publication Date:
12/31/1968
Filing Date:
12/23/1965
Assignee:
DOW CHEMICAL CO
Primary Class:
Other Classes:
166/281, 166/297, 166/308.1
International Classes:
E21B43/119; E21B43/26; E21B47/00; E21B47/10
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