Method and apparatus for firing borehole perforating apparatus

Details Method and apparatus for firing borehole perforating apparatus Method and apparatus for firing borehole perforating apparatus

1984-09-10

1986-12-16

Levy, Stuart S.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

Firing control mechanically actuated in bore

166 551, 166297, 175299, 175304, E21B 43116, E21B 2900

Patent

active

046290095

ABSTRACT:
Method and apparatus for firing perforating apparatus in a borehole. A mechanically operated firing assembly is run into the borehole on the end of a cable and latched onto a perforating apparatus. Tension is pulled on the cable. At a predetermined tension force a firing rod is automatically released and as a result of force exerted by a compression spring driven into impactment with a percussion firing head to thereby detonate the perforating apparatus. Additionally, the firing assembly can be reset by application of downward force thereto.

REFERENCES:
patent: 2155322 (1939-04-01), McCullough
patent: 2305139 (1942-12-01), Collins
patent: 2621025 (1952-12-01), Denning
patent: 2873675 (1959-01-01), Lebourg
patent: 3706344 (1972-12-01), Vann
patent: 3800705 (1974-04-01), Tamplen
patent: 4041865 (1977-08-01), Evans et al.
patent: 4484639 (1984-11-01), Ayers
patent: 4512406 (1985-04-01), Vann et al.
Johnston Perforating Services, advertising brochure, Johnston Testers, Inc., 1953.

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