A shaped lens for minimizing differences in time of arrival at the output surface of an explosive assembly. The lens is plano-convex with the convex shape oriented towards the explosive charge. The lens becomes monotonically thicker as the center of the lens is radially approached from the edge, according to a formula accounting for the detonation velocity of the explosive and velocity of the shockwave through the lens. The lens is preferably incorporated into a test fixture using a liquid explosive, such as nitromethane. The test fixture may be assembled on site, at the test location.

A shaped lens for minimizing differences in time of arrival at the output surface of an explosive assembly. The lens is plano-convex with the convex shape oriented towards the explosive charge. The lens becomes monotonically thicker as the center of the lens is radially approached from the edge, according to a formula accounting for the detonation velocity of the explosive and velocity of the shockwave through the lens. The lens is preferably incorporated into a test fixture using a liquid explosive, such as nitromethane. The test fixture may be assembled on site, at the test location.

There is a shaped charge for making an asymmetrical perforation into a casing. The shaped charge includes a case extending along a symmetry axis X and having a back wall and an open end; an explosive material located within the case; a liner located within the case, over the explosive material; a booster material; and an asymmetrical feature. The asymmetrical feature is selected to generate an asymmetrical perforation into the casing.

There is a shaped charge for making an asymmetrical perforation into a casing. The shaped charge includes a case extending along a symmetry axis X and having a back wall and an open end; an explosive material located within the case; a liner located within the case, over the explosive material; a booster material; and an asymmetrical feature. The asymmetrical feature is selected to generate an asymmetrical perforation into the casing.

Provided herein are shaped charges for focusing a fluid mass and related methods of using the shaped charges for disruption of an explosive target. The shaped charge comprises a plastic shell having a special geometric shape configured to support a shape-conforming explosive. A cylindrical plastic body has an interior volume for containing a fluid and the plastic shell. The plastic body closed distal end has a geometric shape that is substantially matched to the shape of the plastic shell.

Provided herein are shaped charges for focusing a fluid mass and related methods of using the shaped charges for disruption of an explosive target. The shaped charge comprises a plastic shell having a special geometric shape configured to support a shape-conforming explosive. A cylindrical plastic body has an interior volume for containing a fluid and the plastic shell. The plastic body closed distal end has a geometric shape that is substantially matched to the shape of the plastic shell.

A fuze booster includes a first explosive charge having a cavity with an annular portion of the first explosive charge encircling a first axial portion of the cavity and a semi-annular portion partially encircling a second axial portion of the cavity. The annular portion abuts the semi-annular portion. An explosively-inert material abuts the semi-annular portion, abuts the annular portion, and partially encircles the second axial portion of the cavity. A second explosive charge abuts the explosively-inert material, abuts the semi-annular portion, and partially encircles the second axial portion of the cavity. The second axial portion of the cavity is thus completely encircled by a combination of the semi-annular portion, the explosively-inert material, and the second explosive charge.

A fuze booster includes a first explosive charge having a cavity with an annular portion of the first explosive charge encircling a first axial portion of the cavity and a semi-annular portion partially encircling a second axial portion of the cavity. The annular portion abuts the semi-annular portion. An explosively-inert material abuts the semi-annular portion, abuts the annular portion, and partially encircles the second axial portion of the cavity. A second explosive charge abuts the explosively-inert material, abuts the semi-annular portion, and partially encircles the second axial portion of the cavity. The second axial portion of the cavity is thus completely encircled by a combination of the semi-annular portion, the explosively-inert material, and the second explosive charge.

The disclosure relates to perforating systems for perforating the casing of a wellbore. The perforating systems contain insensitive high explosives. The disclosure also relates to shaped charges containing insensitive high explosives for use in such perforating systems. The disclosure further relates to methods of using such perforating systems to perforate the casing of a wellbore.

The disclosure relates to perforating systems for perforating the casing of a wellbore. The perforating systems contain insensitive high explosives. The disclosure also relates to shaped charges containing insensitive high explosives for use in such perforating systems. The disclosure further relates to methods of using such perforating systems to perforate the casing of a wellbore.