Ammunition and explosives – Igniting devices and systems – Heat – friction – or chemical primers or ignitors
Reexamination Certificate
2008-04-29
2008-04-29
Hayes, Bret (Department: 3641)
Ammunition and explosives
Igniting devices and systems
Heat, friction, or chemical primers or ignitors
C102S304000, C102S315000, C102S275110
Reexamination Certificate
active
11290180
ABSTRACT:
Methods and apparatus for detonating explosives or igniting flammables are disclosed. According to some embodiments of the invention, initiators include an initiating component holding an exploding bridgewire (EBW) or an exploding foil initiator (EFI) and a flammable component housing thermite. An end of the flammable component mates with a corresponding end of the initiating component. A method of initiating the explosives or flammables includes connecting the two components to assemble the initiator, disposing the initiator proximate the explosives or flammables, and activating the initiator to cause ignition of the thermite that then initiates the explosives or flammables. Additionally, a non-explosive kit for the initiator includes the two components with the EBW or EFI initially spaced from the thermite within the flammable component to make the initiator disarmed until final assembly thereof. Cutting torches and perforating guns provide examples of downhole tools that benefit from aspects of the invention.
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Gray Kevin L.
Wilson Paul
Hayes Bret
Patterson & Sheridan L.L.P.
Weatherford / Lamb, Inc.
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