System for the initiation of downhole explosive and propellant s

Details System for the initiation of downhole explosive and propellant s System for the initiation of downhole explosive and propellant s

1991-08-12

1994-06-21

Nelson, Peter A.

Ammunition and explosives

Blasting

Patterned blasting

102313, 102201, F42B 300, F42C 1900

Patent

active

053220196

ABSTRACT:
The present invention is included in an operating assembly for lowering into a wellbore on a wireline, tubular conveyance, or the like, or for use in a horizontal application, for initiating or setting off pyrotechnic, explosive, or propellant elements of that operating assembly, and comprises a firing head and an initiation assembly that are arranged for lowering into the wellbore, from a well head. The firing head provides for the extension of a striker plunger therefrom that travels into the initiating assembly to both arm it and to impact a piezoelectric device therein whose deformation generates an electrical current which fires an array of flashbulbs that excite a laser rod. The excited laser rod produces a laser beam that is passed through a fiberoptic cable or is split to pass through a plurality of fiberoptic cables to detonate initiation charges or to provide a cascading initiation of a number of initiation devices that each fire single or multiple pyrotechnic, explosive or propellant elements individually or in a cascading action.

REFERENCES:
patent: 4237972 (1980-12-01), Lanmon, II
patent: 4870902 (1989-10-01), Simon et al.
patent: 5022324 (1991-06-01), Rice, Jr.
patent: 5148748 (1992-09-01), Yarrington
patent: 5204490 (1993-04-01), Soltz et al.
United States S.I.R. #H1214, Liva et al., Aug. 3, 1993.

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