Patent ID: 8950509
Filing Date: 2015-02-10
Classification: E21B

Abstract:
1. A firing assembly for detonating charges of a perforating gun, the firing assembly comprising: one or more casings connected together to form a containment body configured to fit within a recess formed within a tubular wall of well bore subassembly effective to operate without obtruding on fluid flow within the central core of the subassembly; the containment body comprising a detonation chamber and an actuation chamber; a detonator configured in the detonation chamber; a moveable actuator configured in the actuation chamber and operatively connected to the detonator, wherein the actuator is retained in a first position in the actuation chamber by a retention detent; a coupler operatively connected to the actuator opposite the detonator, wherein the coupler comprises a channel for communicating pressure through the coupler to the actuator effective to overcome the retention detent and to allow the actuator to move in the actuation chamber to a second position, wherein the actuator contacts the detonator in the second position, effective to activate the detonator.