Patent ID: 8375859
Filing Date: 2013-02-19
Classification: F42B

Abstract:
1. A shaped charge device having a front, a rear and an axis of symmetry, the device comprising: an explosive charge; a liner lining a front of the explosive charge, the liner having a recess in the form of a groove encircling the axis of symmetry; and the groove arranged to provide an axis of projection for the liner at an angle relative to the axis of symmetry, wherein the angle is in the range of 1 degree to 45 degrees; and a core plug; and wherein the explosive charge arranged to form the liner into a jet ring upon detonation of the shaped charge device to form a ring shaped cut pattern in a structure contacted by the jet ring, and, after the jet ring has formed the ring shaped cut pattern, impact a portion of the structure within the ring shaped cut pattern with the core plug.