Patent ID: 7690436

Claim:
A wellbore pressure isolation apparatus, comprising: a body having a distal body portion and an adjacent body portion, the distal body portion having a first outside diameter, the adjacent body portion having a second outside diameter that is greater than the first outside diameter; a sealing element disposed about the body and activatable to seal against an interior surface of a surrounding tubular of a wellbore; a plurality of rollers positioned on the distal body portion; and a ring disposed about the body between the distal body portion and the adjacent body portion, the ring having a third outside diameter that is at least greater than the second outside diameter of the adjacent body portion, wherein the rollers are positioned around the first outside diameter of the distal body portion and extend to a fourth outside diameter around the distal body portion, the fourth outside diameter being greater than the first outside diameter of the distal body portion and being less than the second outside diameter of the adjacent body portion.