Selective fire perforating gun switch

Details Selective fire perforating gun switch Selective fire perforating gun switch

1978-04-24

1980-11-18

Scott, James R.

Electricity: circuit makers and breakers

Special application

200 16C, 200 82R, H01H 900, H01H 1500

Patent

active

042347688

ABSTRACT:
A multiple shot selective fire perforating gun for piercing oil field tubular goods, typically during the process of completing an oil or gas well. The perforating gun includes a multiplicity of shaped charges which are fired individually by an associated blasting cap and switch. The switch of all but the lowermost shaped charge is configured to disarm its associated blasting cap until the next lower shaped charge has detonated. The generation of the pressure pulse from detonation of the next lower shaped charge causes a piston in the switch to move to express a stream of flowable material onto a switch actuator which manipulates the switch to place it in an armed condition ready to fire.

REFERENCES:
patent: 2671893 (1954-03-01), Van Scoy et al.
patent: 2837609 (1958-06-01), Clayton et al.
patent: 3309474 (1967-03-01), Heinrich
patent: 3363715 (1968-01-01), Langdon
patent: 3855708 (1974-12-01), Tann et al.
patent: 3912893 (1975-10-01), Stoler

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