Abstract: A shaped charge for use in a well perforating tool includes a jet blocker disposed in an apex of a parabolic or cone-shaped liner. The jet blocker limits the velocity and/or length of a jet that forms upon discharging an explosive in the shaped charge. The jet blocker may include an inert cast-cure type of material such as an epoxy or a flowable plastic that can be readily inserted into an existing shaped charge to fill an external concavity in the liner to any desired height. The height and material selected for the jet blocker determines the degree to which the penetration achieved by the shaped charge is limited, and thus, determines which targeted annulus in the wellbore may be penetrated in operation.

Abstract: A shaped charge for use in a well perforating tool includes a jet blocker disposed in an apex of a parabolic or cone-shaped liner. The jet blocker limits the velocity and/or length of a jet that forms upon discharging an explosive in the shaped charge. The jet blocker may include an inert cast-cure type of material such as an epoxy or a flowable plastic that can be readily inserted into an existing shaped charge to fill an external concavity in the liner to any desired height. The height and material selected for the jet blocker determines the degree to which the penetration achieved by the shaped charge is limited, and thus, determines which targeted annulus in the wellbore may be penetrated in operation.

Abstract: The disclosed embodiments include a perforating gun assembly. The perforating gun assembly includes a housing and at least one perforating charge disposed within the housing. Additionally, the perforating gun assembly includes a detonating cord disposed within the housing and ballistically coupled to the at least one perforating charge. Also included in the perforating gun assembly is a detonator assembly disposed in line or adjacent to the detonating cord. The detonator assembly includes a detonator, a ballistic interrupt, an actuator to remove the ballistic interrupt from a line of fire of the detonator, and a detonator control board to control the actuator and firing of the detonator.

Abstract: The disclosed embodiments include a perforating gun assembly. The perforating gun assembly includes a housing and at least one perforating charge disposed within the housing. Additionally, the perforating gun assembly includes a detonating cord disposed within the housing and ballistically coupled to the at least one perforating charge. Also included in the perforating gun assembly is a detonator assembly disposed in line or adjacent to the detonating cord. The detonator assembly includes a detonator, a ballistic interrupt, an actuator to remove the ballistic interrupt from a line of fire of the detonator, and a detonator control board to control the actuator and firing of the detonator.