Patent ID: 6763882
Filing Date: 2004-07-20
Classification: E21B

Abstract:
An insulated hanger for suspending at least one inner pipe string within a wellhead comprising:an internal suspension means for suspending said at least one inner pipe string; an inner body fixedly secured around said internal suspension means, said inner body comprising an upper cylindrical section, a lower cylindrical section, and a middle cylindrical section; an upper annular insulating member slidingly engaged around said upper cylindrical section of said inner body, said upper annular insulating member having a top end and a bottom end, said top end having a first diameter and said bottom end having a second diameter greater than said first diameter; a lower annular insulating member slidingly engaged around said lower cylindrical section of said inner body, said lower annular insulating member having a top end and a bottom end, said bottom end having a first diameter and said top end having a second diameter greater than said first diameter; a sealing ring slidingly engaged around said middle cylindrical section of said inner body, said sealing ring having a top face engaged with said bottom end of said upper annular insulating member and a bottom face engaged with said top end of said lower annular insulating member; and an outer body fixedly secured around said top end of said lower annular insulating member, said sealing ring and said bottom end of said upper annular insulating member, said outer body having an exterior face and said exterior face of said outer body comprising a means for sealing said exterior face within said wellhead.