The invention relates to a test and/or practice ammunition having at least one projectile with a projectile head and a fin which can be found at the end of the projectile for example or a projectile with a projectile base and a projectile ogive. A cartridge shell is used to receive a drive and has a shell base, wherein an interface is attached in or on the shell base. The test and/or practice ammunition is characterized by a programmable fuze which is arranged in the projectile head or the projectile ogive. The projectile head/projectile ogive is equipped with at least one fuze amplifier and an electronic fuze system and optionally a separating charge.

An initiator head assembly may include a body and an electrical contact component positioned proximal to the body. The body may include a head extending from a base, and a platform extending from the head, and the body may be injection molded as a unitary component. The electrical contact component may include a line-in portion positioned proximal to the platform and a ground portion positioned proximal to the head. The electrical contact component may be formed integrally with the body such that it is anchored in a fixed position in the body. An initiator for a perforating gun assembly may include the initiator head assembly and a shell coupled to the initiator head assembly.

An initiator head assembly may include a body and an electrical contact component positioned proximal to the body. The body may include a head extending from a base, and a platform extending from the head, and the body may be injection molded as a unitary component. The electrical contact component may include a line-in portion positioned proximal to the platform and a ground portion positioned proximal to the head. The electrical contact component may be formed integrally with the body such that it is anchored in a fixed position in the body. An initiator for a perforating gun assembly may include the initiator head assembly and a shell coupled to the initiator head assembly.

A perforating gun assembly may include a first housing extending along a longitudinal axis and a tandem seal adapter (TSA). The first housing may include a coupling provided at a first end of the first housing. The TSA may include a TSA body and a seal element provided on an outer surface of the TSA body. At least part of the TSA may be positioned inside the first housing such that the seal element and the coupling intersect with a common plane that is perpendicular to the longitudinal axis.

A perforating gun assembly may include a first housing extending along a longitudinal axis and a tandem seal adapter (TSA). The first housing may include a coupling provided at a first end of the first housing. The TSA may include a TSA body and a seal element provided on an outer surface of the TSA body. At least part of the TSA may be positioned inside the first housing such that the seal element and the coupling intersect with a common plane that is perpendicular to the longitudinal axis.

A munition with redundant safety features to return the munition to a safe, unarmed state, the munition includes an encasement, an energetic within the encasement, an electronic initiator configured to initiate a detonation of the energetic, wherein the electronic initiator is configured to be discharged to prevent detonation of the energetic, and a mechanical safety assembly configured to be selectively moved from an unarmed position to an armed position, wherein in the armed position the mechanical safety assembly provides a physical barrier between the energetic and the electronic initiator to prevent detonation of the energetic, wherein in the armed position in the mechanical safety assembly provides a pathway between the energetic and the electronic initiator.

A munition with redundant safety features to return the munition to a safe, unarmed state, the munition includes an encasement, an energetic within the encasement, an electronic initiator configured to initiate a detonation of the energetic, wherein the electronic initiator is configured to be discharged to prevent detonation of the energetic, and a mechanical safety assembly configured to be selectively moved from an unarmed position to an armed position, wherein in the armed position the mechanical safety assembly provides a physical barrier between the energetic and the electronic initiator to prevent detonation of the energetic, wherein in the armed position in the mechanical safety assembly provides a pathway between the energetic and the electronic initiator.

A device including: a body having one or more walls defining an internal cavity, the wall(s) having one or more grooves extending in a longitudinal direction of the internal cavity and extending at least partially along a periphery of the wall(s); a mass movable in the longitudinal direction within the internal cavity, the mass having one or more holes extending in a direction offset from the longitudinal direction; a ball partially disposed in the groove(s) and partially disposed in each hole(s); and an elastic material for biasing the ball towards the groove(s). The groove(s) having a shape such that the acceleration greater than a predetermined acceleration profile causes the ball to first move opposite to the direction of the acceleration and then bounce to move in the direction of the acceleration until the ball(s) moves into the hole(s) to free the mass to move longitudinally opposite to the acceleration.

A device including: a body having one or more walls defining an internal cavity, the wall(s) having one or more grooves extending in a longitudinal direction of the internal cavity and extending at least partially along a periphery of the wall(s); a mass movable in the longitudinal direction within the internal cavity, the mass having one or more holes extending in a direction offset from the longitudinal direction; a ball partially disposed in the groove(s) and partially disposed in each hole(s); and an elastic material for biasing the ball towards the groove(s). The groove(s) having a shape such that the acceleration greater than a predetermined acceleration profile causes the ball to first move opposite to the direction of the acceleration and then bounce to move in the direction of the acceleration until the ball(s) moves into the hole(s) to free the mass to move longitudinally opposite to the acceleration.

A tandem seal adapter (TSA) for use with a wellbore tool may include a TSA body including a first end and a second end opposite the first end in an axial direction, a bore extending through the TSA body from the first end to the second end, an electrical contact assembly provided within the bore, the electrical contact assembly being configured to provide electrical connectivity through the bore. The electrical contact assembly may include a bulkhead provided within the bore. An axial position of a maximum outer diameter of the TSA body may overlap with the bulkhead in the axial direction. A portion of the bore overlapping in the axial direction with an entirety of the TSA body having an outer diameter equal to the maximum outer diameter may have a constant bore diameter.