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

1986-03-31

1987-07-07

Novosad, Stephen J.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

With wall engaging packer or anchor

175 454, E21B 431185

Patent

active

046780440

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: 3064733 (1962-11-01), Bourne, Jr.
patent: 3189094 (1965-06-01), Hyde
patent: 3800705 (1974-04-01), Tamplen
patent: 4509604 (1985-04-01), Upchurch
patent: 4531590 (1985-07-01), Peterson
patent: 4554981 (1985-11-01), Davies

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