A double impact bullet with internal hammer and stabilization post.

A coaxial perforating charge includes a shaped charge and a container having a fracture explosive pack inside. The container is coaxially provided at a front end of the shaped charge; the fracture explosive pack is a ring-shaped explosive pack formed by impregnating a fracture explosive for eliminating a compacted zone into the container; the fracture explosive pack is coaxially arranged with the shaped charge. The fracture explosive includes ammonium perchlorate, aluminum powder, additive, and dioctyl sebacate; the additive is hydroxyl-terminated polybutadiene (HTPB), or a mixture of HTPB, N,N′-diphenyl-p-phenylenediamine and toluene di-isocyanate. A perforation method thereof, for self-eliminating a compacted zone, includes steps of: running a jet perforating gun downward; perforating while self-eliminating a compacted zone. The charge and its perforation method are reasonably designed, convenient, safe, reliable, well performed, and able to perforate while self-eliminating the compacted zone, which effectively eliminates an impact on rock permeability of the compacted zone.

A coaxial perforating charge includes a shaped charge and a container having a fracture explosive pack inside. The container is coaxially provided at a front end of the shaped charge; the fracture explosive pack is a ring-shaped explosive pack formed by impregnating a fracture explosive for eliminating a compacted zone into the container; the fracture explosive pack is coaxially arranged with the shaped charge. The fracture explosive includes ammonium perchlorate, aluminum powder, additive, and dioctyl sebacate; the additive is hydroxyl-terminated polybutadiene (HTPB), or a mixture of HTPB, N,N′-diphenyl-p-phenylenediamine and toluene di-isocyanate. A perforation method thereof, for self-eliminating a compacted zone, includes steps of: running a jet perforating gun downward; perforating while self-eliminating a compacted zone. The charge and its perforation method are reasonably designed, convenient, safe, reliable, well performed, and able to perforate while self-eliminating the compacted zone, which effectively eliminates an impact on rock permeability of the compacted zone.

A multi-warhead munition includes a first cylindrical warhead having a cavity filled with high explosive, and a second cylindrical warhead offset axially from the first cylindrical warhead. The second cylindrical warhead is a transformable, segmented warhead including a plurality of segments each having an outer segment face bounding a cavity of the segment filled with high explosive. The segments are elongated and mounted at one end for rotation away from an axis of the munition to an open position in which the segment faces are pointed in a forward direction for detonation. Rotation may generally be somewhere in a broad range from about 105 degrees to about 170 degrees, obtaining different effects in different sub-ranges. The munition includes first and second detonators for the first and second cylindrical warheads respectively, the second detonator simultaneously detonating the segments of the second cylindrical warhead.

A bullet projectile is described wherein an internal cylindrical sliding mechanical hammer mechanism provides secondary impact improving overall effectiveness in delivering a mechanical shock wave to a target.

A bullet projectile is described wherein an internal cylindrical sliding mechanical hammer mechanism provides secondary impact improving overall effectiveness in delivering a mechanical shock wave to a target.

According to an aspect of the invention, there is provided a system for reducing water-entry shock for a projectile entering the water, the system comprising: a first component, the first component being moveable to a target region for which water-entry shock is to be reduced, and arranged to interact with the water, for reducing water-entry shock for a second component; a second component in the form of the projectile, arranged to enter the water in the region for which water-entry shock has been reduced by the first component, functionality of the second projectile component being triggered by the water.

According to an aspect of the invention, there is provided a system for reducing water-entry shock for a projectile entering the water, the system comprising: a first component, the first component being moveable to a target region for which water-entry shock is to be reduced, and arranged to interact with the water, for reducing water-entry shock for a second component; a second component in the form of the projectile, arranged to enter the water in the region for which water-entry shock has been reduced by the first component, functionality of the second projectile component being triggered by the water.

A double impact bullet with internal hammer and stabilization post.

A double impact bullet with internal hammer and stabilization post.