Patent ID: 7469750

Claim:
A sealing apparatus for use in a wellbore tubular, comprising: (a) radially expandable sleeve member having a groove having an arcuate portion; (b) a radially expandable seal member disposed in the groove, the seal member having a radially outward sealing surface that increases surface contact area with the wellbore tubular as the seal member expands, wherein the seal member has a seating surface complementary to the arcuate portion; and (c) at least one expandable anchor element that includes a plurality of circumferential ribs, wherein expanding the expandable sleeve member compresses the radially expandable seal member against the wellbore tubular to form a substantially gas tight seal and expands the at least one expandable anchor element into anchoring engagement with the wellbore tubular to form a substantially liquid tight seal, the substantially liquid tight seal being formed of the plurality of ribs.