Abstract:
An initiator device, comprising an explosive foil initiator; an initiator shaped charge that is activated by the explosive foil initiator; the initiator shaped charge comprising an outer casing having an opening therein defining a volume, an explosive located inside the opening, the explosive defining a concave cavity therein; a metal liner lining the concave cavity; and a detonation cord that is activated by the initiator shaped charge.
Abstract:
Disclosed are thermite charges for use in well perforation and downhole fracing. The thermite charges have a core, and optionally a case, where at least one of the core and the case includes thermite material.
Abstract:
A shaped charge includes a casing defining an interior volume, wherein the casing is prepared by sintering a metal powder or a mixture of metal powders; a liner located in the interior volume; and an explosive between the liner and the casing. A method for manufacturing a shaped charge casing includes the steps of mixing a metal powder or a metal powder mixture with a binder to form a pre-mix; pressing the pre-mix in a mold to form a casing green body; heating the casing green body to a first temperature to vaporize the binder; raising the temperature to a second temperature in an inert or reducing atmosphere to sinter the metal powder or the metal powder mixture to produce the shaped charge casing.
Abstract:
A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.
Abstract:
A hollow-charge projectile is provided with a precision charge (12) which, on the one hand, is surrounded on the outside by a metallic jacket (11) and, on the other hand, is lined on the inside with an insert (13). During assembly there exists the danger of formation, due to thermal expansion, of cracks, cavities or fissures between the three components (11, 12, 13). This is avoided by first cooling down the precision charge (12), heating the jacket (11) and introducing the precision charge (12) into the jacket (11), and by subsequently heating the jacketed precision charge (12), cooling the insert (13) and pressing the insert into the precision charge (12). The thus assembled components (11, 12, 13) are brought to room temperature.
Abstract:
An explosive charge including a body and an insert disposed within the body and having given regions which are uniformly distributed around the center of the insert which differ from their respective immediately adjacent regions for forming, upon explosive conversion of the charge, a rod-shaped projectile which has a tail end with shaped portions for providing aerodynamic stabilization of the trajectory of the projectile. The insert is fastened to the body in an essentially band-shaped contact zone disposed between the insert and the body so that there exists between the insert and the body a strong force transfer capability at the given regions and a weaker to negligible force transfer capability between the given regions.
Abstract:
An ordnance device includes a submunition having a generally cylindrical case packed with an explosive charge. The rearmost end of the case is capped by a detonator that fires the explosive charge when a target is sensed. The front end of the case is capped by a liner that on detonation of the explosive charge converts to one or more explosively forged penetrators that speed toward the target at supersonic speed. By assembling the liner from a plurality of narrow metal strips arranged in parallel and weakly bonded together, the strips separate on detonation forming a plurality of aerodynamically stable slugs, each of which has undergone plastic deformation to form a projectile that is potentially lethal.
Abstract:
A plurality of disks with the outer shape of a circle has another circle ched non-concentrically in the disk. By stacking the proper assortment of disks about a symmetric warhead, the appropriate asymmetry profile can be obtained. Any asymmetry profile can be created through the proper stacking of disks even if the desired profile is non-linear. With an assortment of extra disks the confinement about a warhead can be quickly modified to provide another configuration based on the results of the test made on the previous warhead.
Abstract:
Apparatus for forming, from a generally conical billet, a hollow forging of desired wall thickness having a generally conical portion tapering to a smaller cylindrical extension, the inner and outer surfaces of the conical portion having minor predetermined and spatially related devisions from purely conical configurations, said apparatus comprising, in combination, a die having a concave conical configuration, with a cylindrical extension at the smaller end, to conform to the desired external configuration of said forging; a punch having a convex conical configuration to conform to the desired configuration of the inner surface of the conical portion of the forging; and means mounting the punch for movement coaxially into the die from the larger end thereof, to an extent which determines the wall thickness of the forging.