Well sealing assembly having resilient seal ring with metal end caps

Claim 1

A well sealing assembly for sealing between the interior surface of a housing and the exterior of a tubular body, said tubular body having a first exterior surface, a second exterior surface which has a larger diameter than said first exterior surface and a tapered surface between said first and second surfaces, comprising a seal ring assembly having a resilient ring with upper and lower flat surfaces, an interior convex surface and an exterior flat surface and annular metal end caps having flat portions bonded on said upper and lower flat surfaces of said resilient ring, inner legs tapering with the convex interior surface of said resilient ring and outer legs on the flat exterior surface of said resilient ring, the interior surface of said resilient ring being in close spaced relationship to said first surface of said tubular member when said seal ring assembly surrounds said first surface, and means for moving said seal ring assembly axially from its position surrounding said first surface of said tubular member, over said tapered surface and into its set position surrounding said second surface, said resilient ring having sufficient resiliency and volume to expand outward when moved to said set position to seal against said interior housing surface and to move the exterior legs of said end caps into metal-to-metal sealing engagement with said interior housing surface and to seal against said second surface with said interior legs in metal-to-metal sealing engagement with said second surface.