Tubing pressure operated initiator for perforating in a well bor

Details Tubing pressure operated initiator for perforating in a well bor Tubing pressure operated initiator for perforating in a well bor

1985-05-28

1986-12-16

Novosad, Stephen J.

Wells

Processes

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

175 452, 175 456, E21B 43116

Patent

active

046290010

ABSTRACT:
In a tubing conveyed perforating gun assembly having shaped charges to perforate a well, an improved pressure sequence shaped charge detonator is included. The preferred form of device is appended to the bottom of the assembly to function as a backup detonator. First and second piston and cylinder assemblies in an elongate body provide pressure initiated arming and subsequent pressure initiated firing pin movement to achieve primer cord detonation for perforation of the well. The pressure sequence is controllable, selectively to a specified pressure to arm and thereafter to fire.

REFERENCES:
patent: 3800705 (1974-04-01), Tamplen
patent: 4484632 (1984-11-01), Vann
patent: 4531590 (1985-07-01), Peterson
patent: 4554981 (1985-11-01), Davies
patent: 4557331 (1985-12-01), Stout

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