Title:
Apparatus for perforating well casing
United States Patent 2990773


Inventors:
Toelke, Lester W.
Application Number:
US65861257A
Publication Date:
07/04/1961
Filing Date:
05/13/1957
Assignee:
GREAT LAKES CARBON CORP
Primary Class:
Other Classes:
89/1.15, 166/55.2
International Classes:
E21B43/117
View Patent Images:
US Patent References:
2764938Open hole carrier1956-10-02
2756677Well perforating device1956-07-31
2543914Bow shuttle1951-03-06
Foreign References:
AU200153B