Title:
Apparatus for perforating casing
United States Patent 2799224


Inventors:
Long, Thomas L.
Application Number:
US40602054A
Publication Date:
07/16/1957
Filing Date:
01/25/1954
Assignee:
JOHNSTON TESTERS INC
Primary Class:
Other Classes:
89/1.15, 102/310, 102/321, 175/4.6
International Classes:
E21B43/116; E21B43/117
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