Specially-shaped-charges for focusing fluid jets

A shaped-charge comprising:

• a container having a plurality of curved walls, a top surface, and a bottom surface to form a container volume for containing a liquid, the container having a symmetry plane;
• the liquid positioned in the container volume;
• at least one explosive charge positioned in the container volume and immersed in the liquid, wherein at least one explosive charge is a geometrically-shaped-charge or is contained within a shell volume formed by shell walls;
• a detonator channel for receiving an explosive firing train to controllably detonate the at least one explosive charge;
• wherein the container walls, the at least one explosive charge and liquid are configured to provide a wedge-shaped liquid jet or a liquid jet having a circular cross-section upon detonation of the at least one explosive charge immersed in the liquid contained in the container volume;
• wherein at least one of the plurality of curved walls has a parabolic profile;
• and
• where the parabolic profile is a biaxial profile having a parabolic curvature along each of an axial direction and a radial direction relative to a container center-line.

A shaped-charge comprising:

• a container having a plurality of curved walls, a top surface, and a bottom surface to form a container volume for containing a liquid, the container having a symmetry plane;
• the liquid positioned in the container volume;
• at least one explosive charge positioned in the container volume and immersed in the liquid, wherein the at least one explosive charge is a geometrically-shaped-charge;
• a detonator channel for receiving an explosive firing train to controllably detonate the at least one explosive charge;
• wherein the container walls, the at least one explosive charge and liquid are configured to provide a wedge-shaped liquid jet or a liquid jet having a circular cross-section upon detonation of the one or more explosive charges immersed in the liquid contained in the container volume;
• wherein the at least one explosive charge comprises one or more geometrically-shaped-charges, including one, two or three geometrically-shaped-charges, wherein for a plurality of geometrically-shaped-charges the geometrically-shaped-charges form a linear or a triangular shape relative to each other;
• an explosives holder configured to support and position each of the geometrically-shaped-charges in the container volume, the explosive holder further comprising an explosives guide configured to support an explosive firing train;
• the explosive firing train positioned in the explosives guide, wherein the explosive firing train comprises a flexible explosive sheet or detonation cord having one or more termination ends that contact the geometrically-shaped-charges;
• and
• wherein the explosives guide is shaped to provide controllable detonation of each of the geometrically-shaped-charges, including with an explosives guide length.