Patent ID: 6941871
Filing Date: 2005-09-13
Classification: E21B

Abstract:
1. A well perforating device comprising a tubular body member having a plurality of inwardly shaped hole penetration areas of reduced thickness formed on the outer surface thereof, and a plurality of perforating charges positioned within said body member, each of said perforating charges containing a hollow cone shaped explosive charge aligned with one of said hole penetration areas so that upon detonation of the hollow cone shaped charge said body member is penetrated through said aligned hole penetration areas, an improvement comprising: a plurality of inwardly shaped connected faceted areas formed on the outer surface of said body member so as to extend around a portion of said body member at the level of said hole penetration areas and excluding said hole penetration areas, such that upon detonation of said hollow cone shaped charges of said perforating charges said inwardly shaped connected faceted areas are expanded to substantially correspond to the outside diameter of said body member.