Patent ID: 7975592

Claim:
An apparatus for perforating a casing string comprising: a first pressure chamber and a second pressure chamber, each first and second pressure chamber comprising a gun assembly contained therein, the first pressure chamber being positioned longitudinally adjacent the second pressure chamber on the casing string; a firing assembly for igniting the gun assembly in the first pressure chamber comprising: a detonator; a remote signaler to remotely detonate the firing assembly; a ballistic transfer assembly for igniting the gun assembly in the second pressure chamber, wherein said ballistic transfer assembly comprises a booster charge at one end of said first pressure chamber adjacent a receiver charge at one end in said second pressure chamber; an independent power source for supplying a voltage necessary to activate said detonator; said independent power source comprising; a low voltage power source; and a high-voltage device, said high-voltage device elevating a low voltage delivered from said low voltage power source to a higher voltage sufficient to activate said detonator.