Patent ID: 7530397

Claim:
An apparatus for explosively severing a length of pipe, said apparatus comprising: (a) a tubular housing having an internal barrel space for receiving an axial column of explosive material between a resiliently biased detonator housing at one end of said tubular housing and a selectively removable end plug at an opposite end of said tubular housing; (b) a first electrically initiated detonator positioned in said detonator housing and disposed to bear upon one end of said column of explosive material by said detonator housing bias; (c) a second electrically initiated detonator positioned in said removable end plug and disposed to bear upon an opposite end of said column of explosive; (d) a capacitive firing cartridge within said tubular housing; and, (e) electrical conduits connecting said capacitive firing cartridge with said first and second detonators whereby said removable end plug may be detached from said tubular housing without disconnecting electrical continuity between said capacitive firing cartridge and said detonators.