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Title:
Well casing seals
United States Patent 3387656
Inventors:
John, Guest
Knox, John A.
Application Number:
US51990566A
Publication Date:
06/11/1968
Filing Date:
01/11/1966
Assignee:
HALLIBURTON CO
Primary Class:
Other Classes:
277/312, 277/336
International Classes:
E21B33/14
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