Patent ID: 8555959

Claim:
A compression assembly for actuating packing elements of a through tubing bridge plug in a casing string of a wellbore, the compression assembly comprising: a support assembly having a plurality link arm assemblies each including a short arm pivotably mounted to a long arm, the support assembly having a running configuration in which the link arm assemblies are substantially longitudinally oriented and an operating configuration in which the short arms are pivoted relative to the long arms such that the short arms form a support platform; and an anti extrusion assembly operably associated with the support assembly, the anti extrusion assembly including a base member and a plurality of petals rotatably mounted to the base member, the anti extrusion assembly having a running configuration in which the petals are substantially perpendicular to the base member and nested relative to one another and an operating configuration in which the petals are radially outwardly disposed substantially filling gaps between the short arms, the anti extrusion assembly including a plurality of webbing elements each attached to one of the petals wherein at least a portion of each webbing element overlaps an adjacent webbing element when the anti extrusion assembly is in the operating configuration such that the webbing elements substantially fill gaps between the petals.