Patent ID: 8783341

Claim:
A tool for use in a wellbore, comprising: an element system; a slip; a first back-up ring member positioned between the element system and the slip, wherein an outer surface of the first back-up ring member has a groove formed thereabout that allows a portion of the first back-up ring member to pivot radially outward during expansion; a housing having first, second, and third shoulders disposed on an inner surface thereof, wherein the shoulders are spaced axially apart from one another; and a collet disposed within the housing, the collet comprising: a body comprising a section having an enlarged outer diameter, the body adapted to slide between first and second positions, wherein a first axial end of the section abuts the second shoulder when the body is in the first position, and the section mates with the third shoulder when the body is in the second position; and two or more fingers coupled to the body, the end of each finger having an enlarged outer diameter, wherein the end mates with the first shoulder when the body is in the first position.