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A fluid blade disablement (FBD) tool that forms both a focused fluid projectile that resembles a blade, which can provide precision penetration of a barrier wall, and a broad fluid projectile that functions substantially like a hammer, which can produce general disruption of structures behind the ba

A fluid blade disablement (FBD) tool that forms both a focused fluid projectile that resembles a blade, which can provide precision penetration of a barrier wall, and a broad fluid projectile that functions substantially like a hammer, which can produce general disruption of structures behind the barrier wall. Embodiments of the FBD tool comprise a container capable of holding fluid, an explosive assembly which is positioned within the container and which comprises an explosive holder and explosive, and a means for detonating. The container has a concavity on the side adjacent to the exposed surface of the explosive. The position of the concavity relative to the explosive and its construction of materials with thicknesses that facilitate inversion and/or rupture of the concavity wall enable the formation of a sharp and coherent blade of fluid advancing ahead of the detonation gases.

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1. A device for generating a fluid jet, comprising: a container for containing fluid, the container having a concavity in a front container side, wherein the container comprises a cavity for fluid and wherein the concavity has a concavity wall thickness sufficiently thin to allow at least partial in

1. A device for generating a fluid jet, comprising: a container for containing fluid, the container having a concavity in a front container side, wherein the container comprises a cavity for fluid and wherein the concavity has a concavity wall thickness sufficiently thin to allow at least partial inversion of a curvature of a bottom of the concavity in response to fluid pressure when the cavity contains fluid;an explosive assembly positioned within the container, the explosive assembly comprising an explosive holder and explosive held by the explosive holder, wherein a front side of the explosive is oriented toward the concavity and wherein the cavity for fluid is located between a plurality of walls of the container and the front side of the explosive; anda detonating means positioned for detonation of the explosive. 2. The device of claim 1, wherein the concavity comprises a trough with a trough shape and a trough bottom shape. 3. The device of claim 2, wherein the trough bottom shape is selected from the group consisting of a curved shape, a substantially flat surface, a substantially flat surface with filleted walls, a substantially flat surface with chamfered walls, a flared shape, and a wedge shape and wherein an end of the trough is selected from the group consisting of a curved surface, a filleted surface, a chamfered surface, a substantially flat surface, and an open end. 4. The device of claim 2, wherein a trough cross-sectional shape is selected from the group consisting of an elongate shape, an ellipse, a cross, and a shape comprising an intersection of a plurality of polygons. 5. The device of claim 1, further comprising a plurality of legs attached to the container and configured for reduction of variable tamping by environmental contacts with the container. 6. The device of claim 1, wherein the explosive is symmetrically disposed relative to the concavity. 7. The device of claim 1, wherein the container walls are made of a material selected from the group consisting of plastics and metals. 8. The device of claim 1, wherein at least a portion of a concavity wall comprises a material different from a material of a non-concavity wall of the container. 9. The device of claim 1, wherein the concavity wall thickness is less than approximately 0.5 inch. 10. The device of claim 1, wherein the explosive is a plastic explosive or a containerized liquid explosive. 11. The device of claim 1, wherein the explosive is selected from the group consisting of trinitrobenzene, trinitrotoluene, trinitrobenzoic acid, trinitroaniline, tetryl, ethyl tetryl, picric acid, ammonium picrate, methyl picrate, ethyl picrate, picryl chloride, trinitroxylene, trinitrocresol, styphnic acid, lead styphnate, triaminotrinitrobenzene, hexanitroazobenzene, hexanitrostilbene, tetranitrodibenzotetrazapentalene, tetranitrocarbazole, tetranitrodibenzotetrazapentalene, methyl nitrate, nitroglycol, nitroglycerine, erythritoltetranitrate, mannitol hexanitrate, pentaerythritol tetranitrate, pentaerythritol trinitrate, ethylenedinitramine, nitroguanidine, nitro urea, cyclo-1,3,5-trimethylene-2,4,6-trinitramine, cyclotetramethylenetetranitramine, tetranitroglycolurile, mercury fulminate, lead azide, silver azide, and ammonium nitrate, combinations thereof, combinations thereof with inert materials, nitromethane, and a binary liquid explosive. 12. The device of claim 1, further comprising a fluid within the cavity. 13. The device of claim 12, wherein the fluid is water, water containing a density-increasing constituent, a fluid solution, a fluid suspension, a solvent fluid, a solubilizing fluid, or a shock-impedance-matching fluid. 14. The device of claim 1, further comprising an outer tamping container at least partially surrounding the container for containing fluid. 15. The device of claim 1, wherein the detonating means comprises a detonator selected from the group consisting of detonating cord, a blasting cap, a non-electric detonator, an instantaneous non-electric detonator, a short period delay non-electric detonator, a long period delay non-electric detonator, an instantaneous electric detonator, a short period delay electric detonator, a long period delay electric detonator, an exploding-bridgewire detonator, a slapper detonator, a pencil detonator, a stab initiator detonator, a hot wire initiator detonator, and a direct laser initiator of high explosive. 16. The device of claim 1, wherein fluid overlays the top side of the explosive to a depth approximately equal to or greater than a distance between the front side of the explosive and the bottom of the concavity and optionally wherein a top side of the container is open. 17. The device of claim 1, the container comprising a fluid port, a front section comprising the concavity, and a back section comprising a detonator well for operably connecting the detonating means to the explosive, the front section and the back section each comprising a mating means to form a liquid-tight seal when mated. 18. The device of claim 17, wherein the mating means comprises a flange with a flange facing selected from the group consisting of a flat face, a raised face, a ring joint, a male-and-female joint, and a tongue-and-groove joint. 19. The device of claim 17, wherein the explosive holder comprises a flange edge configured for engagement with the mating means of the front section and the back section and wherein the front section and the back section are in fluidic communication. 20. The device of claim 17, wherein the explosive holder comprises an explosive receiving cavity wherein at least one layer of plastic explosive is positioned. 21. A method for penetrating a wall using a device for generating a fluid jet, the method comprising: loading the device of claim 1 with a blade-forming fluid;positioning the device adjacent to a wall at a separation distance;detonating an explosive within the device to generate a fluid blade and a secondarily impacting fluid body;accelerating the fluid blade and secondarily impacting fluid body toward the wall using detonation gases;penetrating the wall with the fluid blade to form a hole; andadmitting the secondarily impacting fluid body through the hole. 22. The method of claim 21, wherein the separation distance is between approximately zero and a maximum stand-off distance determined by a thickness and a material composition of the wall and an amount of explosive generating the fluid blade.