Patent ID: 8870186

Claim:
A seal assembly for use with a casing hanger comprising: an upper ring; a lower compressible ring coaxially disposed with the upper ring; a bore axially extending through the upper ring and compressible ring; an elongated fastener inserted in the bore having threads on a lower end; first and second annular support grommets on opposing surfaces of the compressible ring, the first and second support grommets each comprising, an aperture registered with the bore and a protrusion projecting into the compressible ring, so that when the fastener is torqued to axially compress the lower compressible ring, a sealing interface is formed between the first and second support grommets and the lower compressible ring; and O-rings in sealing contact between the fastener and inner surfaces of the first and second support grommets, and that each have an inner diameter greater than an outer diameter of the lower end of the elongated fastener.