Patent ID: 9145755
Filing Date: 2015-09-29
Classification: E21B

Abstract:
1. A well tool for sealing against a wall of a well, comprising: an elongate mandrel; a seal assembly encircling the mandrel, the seal assembly changeable while on the well tool between an unset state and an axially compressed, set state, the seal assembly comprising: an annular, elastomer seal element encircling the mandrel and configured to radially deform into contact with the wall of the well when the seal assembly is changed to the set state; an annular anti-extrusion ring encircling the mandrel and comprising a first annular wall toward an axial end of the seal element and a second, opposing annular wall, the first and second walls configured to stand radially outward toward, but leaving a gap with, the wall of the well when the seal assembly is changed to the set state; a garter spring embedded in the seal element adjacent the axial end of the seal element and configured to span the gap between the anti-extrusion ring and the wall of the well when the seal assembly is changed to the set state; where the first and second annular walls define an interior annular cavity; an elastomer ring encircling the mandrel and substantially filling the annular cavity; and an annular wedge in the elastomer ring and encircling the mandrel, the annular wedge constructed substantially of a more rigid material than the elastomer of the ring.