Explosively actuated well tool having improved disarmed configur

Details Explosively actuated well tool having improved disarmed configur Explosively actuated well tool having improved disarmed configur

1974-12-23

1977-02-15

Purser, Ernest R.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

Independent firing of plural charges

102 21, 200 1R, E21B 43116

Patent

active

040077969

ABSTRACT:
There is disclosed a single wire multiple shot selective fire perforating gun for piercing oil field tubular goods, typically during the process of completing an oil or gas well. A switch in the gun electrically isolates an associated blasting cap and short circuits the terminals thereof until the associated blasting cap and perforating element are armed. A plurality of blasting cap-perforating element assemblages are vertically disposed on the tool with the detonation of one perforating element arming the next adjacent blasting cap.

REFERENCES:
patent: 2543823 (1951-03-01), Barry
patent: 2620029 (1952-12-01), Turechek et al.
patent: 3208378 (1965-09-01), Boop
patent: 3327792 (1967-06-01), Boop
patent: 3768408 (1973-10-01), Hallmark
patent: 3773120 (1973-11-01), Stroud et al.

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