METAL TO METAL POLISHED BORE RECEPTACLE SEAL FOR LINER HANGER/SEAL ASSEMBLIES

A liner string has a hanger/packer near its upper end for connection and sealing to a surrounding tubular. A polished bore assembly is located above the packer and is pushed down after the liner hanger is set to slide over a metal to metal seal on the packer body. A surface string is then tied into the polished bore with another metal to metal seal against the polished bore. The liner string has just metal to metal seals going up to the surface for well pressure containment. Elastomer seals to the polished bore are eliminated. Placement of the polished bore above the packer body allows for a larger diameter polished bore so as to minimize restriction to future production flow. The liner top packer seal is also metal to metal as offered by Baker Hughes Incorporated under the ZX trademark.