Variable time delay firing head

Details Variable time delay firing head Variable time delay firing head

1989-03-09

1991-11-05

Neuder, William P.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 63, 102312, E21B 431185

Patent

active

050624857

ABSTRACT:
The device of the present invention comprises first means for initiating a first combustive reaction which is actuated in response to a first pressure condition in at least a portion of the well bore, means to initiate any desired number of additional combustive reactions, and means for actuation an explosive charge to actuate perforating guns, or the like, in the well bore.

REFERENCES:
patent: 4572288 (1986-02-01), Kinley
patent: 4614156 (1986-09-01), Colle, Jr. et al.
patent: 4619333 (1986-10-01), George

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