Patent ID: 6772844
Filing Date: 2004-08-10
Classification: E21B

Abstract:
A seal apparatus for sealing an annulus between a mandrel with an outer diameter and an outer tubular, the apparatus comprising:a first seal ring moveably engaging the outer diameter of the mandrel; a second seal ring engaging the outer diameter of the mandrel; a double-ramp cylinder moveably engaging the outer diameter of the mandrel, the double-ramped cylinder being positioned between the first seal ring and the second seal ring; a means for limiting the movement of the second seal ring in the axial direction away from the double-ramped cylinder; wherein the seal apparatus is operable in a running-in position wherein the first and second seal rings are maintained out of contact with the outer tubular; and wherein the seal apparatus is operable in a sealing position wherein the first and second seal rings form at least one fluid seal with the outer tubular.