Title:
Apparatus for well drilling operations with explosives
United States Patent 3215074
US Patent References:
Fuse
- - 1474548

Casing perforating gun
- - 2543823

Cutting apparatus
- - 2984307


Inventors:
Robinson Jr., Leon H.
Friedman, Robert H.
Publication Date:
11/02/1965
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Assignee:
EXXON PRODUCTION RESEARCH CO
Primary Class:
175/4.500
Other Classes:
175/4.600, 102/308
International Classes:
E21B7/00
Foreign References:
AU155408B
FR999974A
GB645611A