E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/114 (2006.01) F42B 1/028 (2006.01)
Patent
CA 2182409
A shaped charge for efficiently transferring energy from an explosive material to create a jet while reducing the effect of shock reverberations on the jet. The shaped charge incorporates a first liner adjacent the explosive material and a second liner having a hollow center. The combination of two liners reduces the effect of shock reverberations on the charge, thereby increasing thejet's cohesiveness and target penetration capability. The first and second liners can be formed as a single liner having at least two liner elements extending outwardly from the liner apex. Multiple liners can be similarly placed adjacent to the other liners in a cascading fashion, or a gap can be incorporated betweenadjacent liners. A shock absorbing material can be positioned between liners to further attenuate the shock reverberations. Alternatively, such gap can be filled with an explosive material to increase the jet mass. The first liner can be smaller than the second liner to produce a segmented pulse in the jet.
Ridout & Maybee Llp
Western Atlas International Inc.
LandOfFree
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