Patent ID: 8424606
Filing Date: 2013-04-23
Classification: E21B

Abstract:
1. A perforating system, comprising: a perforating gun for being positioned within a well bore; a tubular gun housing of the perforating gun extending in an axial direction; an exterior surface of the tubular gun housing; an inner volume of the gun housing sealed by the exterior surface of the gun housing having an inner volume pressure thereof and configured to receive fluid and debris therein; a perforating portion of the gun housing configured to be perforated to provide fluid access to the inner volume; a plurality of shaped charges located in the inner volume of the tubular gun housing adjacent the perforating portion and extending along the axial direction configured to perforate the perforating portion of the gun housing and a wellbore wall to provide fluid communication between the inner volume of the gun housing and the formation located beyond the perforated wellbore wall; a firing direction of the plurality of shaped charges substantially perpendicular to the axial direction and towards the perforating portion of the gun housing; an eccentralizer member extending from the external surface of the tubular gun housing of the perforating gun in a second direction that is substantially opposite to the firing direction; a first flow restrictor connected to the exterior surface of the gun housing and extending in the axial direction adjacent to the perforating portion; a second flow restrictor connected to the exterior surface of the gun housing and extending in the axial direction adjacent to the perforating portion opposite from the first flow restrictor; a third flow restrictor extending circumferentially along the exterior surface of the gun housing above the plurality of the shaped charges; and a fourth flow restrictor extending circumferentially along the exterior surface of the gun housing below the plurality of shaped charges; and wherein the first and second flow restrictors are configured to extend from the exterior surface of the gun housing to engage an inner wall of a wellbore and further restrict fluid flow from within the wellbore through the perforated portion of the gun housing after the shaped charges have been detonated.