Importance

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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.

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First Claim