Apparatus for perforating well casings
United States Patent 2779278

Inventors:
Klotz Jr., Robert L.
Publication Date:
01/29/1957
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Assignee:
Borg, Warner
Primary Class:
102/310
Other Classes:
89/1.150
International Classes:
E21B43/116; F42B3/08; E21B43/11; F42B3/00
US Patent References:
2358951Perforator gun
2399211Method of perforating well casings
2402153Gun perforator
2407093Method and apparatus for cutting or punching sheet material
2415814Cable cutting method and device
2494256Apparatus for perforating well casings and well walls
Foreign References:
GB573078A