Patent ID: 7762323

Claim:
A downhole plug, comprising: a body; an element system disposed about a first end of the body; first and second back-up ring members, each having two or more tapered wedges, wherein the tapered wedges are at least partially separated by two or more radial grooves that are offset from one another and disposed about opposite ends of a circumferential groove disposed therebetween, wherein a first radial groove of the first back-up ring member extends to an outer diameter thereof, and a second radial groove of the first back-up ring member extends to an inner diameter thereof; first and second cones disposed adjacent the first and second back-up ring members; a collet valve assembly disposed about a second end of the body, the collet valve assembly comprising: a housing having a first and second shoulders disposed on an inner surface, thereof and one or more ports formed therethrough; a collet disposed within the housing, the collet having a body and two or more fingers disposed thereon, the fingers having a first end with an enlarged outer diameter adapted to engage the first shoulder of the housing, wherein the body includes a section having an enlarged outer diameter adapted to engage the second shoulder of the housing.