Abstract: An assembly for perforating a downhole formation includes a perforating gun, coupled to a downhole conveyance system, the perforating gun including an explosive charge and an uphole contact. The assembly also includes a tandem, coupled to the perforating gun proximate the uphole contact, the tandem including a cartridge assembly communicatively coupled to the downhole contact and a primary igniter communicatively coupled to the cartridge assembly. The assembly further includes an intermediate sub, coupled to the tandem opposite the perforating gun, the intermediate sub receiving at least a portion of the primary igniter, the intermediate sub having a fuse and secondary igniter. The assembly also includes a setting tool coupled to the intermediate sub, the setting tool receiving a setting signal via the secondary igniter.

Abstract: A pressure impulse mitigating barrier which includes a water gel sheet having an array of protrusions formed from the water gel; and/or a layer having a plurality of disruptor particles is provided. Such a structure may protect an entity from the effects of pressure impulse, e.g. from damage caused by projectiles or from explosive blast.

Abstract: A method for protecting an entity from the effects of an explosion or from the effects of contact with a projectile by covering at least a part of the entity in a barrier which includes a cross-linked water gel.

Abstract: A method for protecting an entity from the effects of an explosion or from the effects of contact with a projectile by covering at least a part of the entity in a barrier which includes a cross-linked water gel.

Abstract: A pressure impulse mitigating barrier which includes a water gel sheet having an array of protrusions formed from the water gel; and/or a layer having a plurality of disruptor particles is provided. Such a structure may protect an entity from the effects of pressure impulse, e.g. from damage caused by projectiles or from explosive blast.

Abstract: One embodiment of the present invention discloses a shot indication device that indicates the orientation of a downhole tool that is inside of a wellbore at a particular time. The shot indication device can also be used to determine the orientation of a perforating gun with shaped charges at the instant the shaped charges are detonated. The shot indication device is comprised of an indicator housing secured within the downhole tool. Formed within the indicator housing is an annulus whose axis is parallel to the axis of the downhole tool. Disposed inside of the annulus is an indicator element that freely moves about the circumference of the annulus.