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US 5,330,002 AGranted
Hanger assembly
AssigneeCooper Industries, Inc.
InventorBrian Saunders
Life of this patent
Estimating the term…
Abstract
A hanger (3) is suspended and sealed within a wellhead housing (5) by means of a landing ring which engages teeth (8) on the hanger, and a sealing device consisting of wedge rings (15 and 16) which seal respectively against the teeth (8) and the wall of the housing (5).
Claims8
A hanger assembly for a wellhead, comprising:
- a tubular housing having a landing face on an inside surface thereof;
- a tubular metal hanger disposed coaxially within said housing and spaced radially inwardly therefrom to form therewith a space, said hanger having axially spaced, circumferentially extending external teeth;
- a supporting device disposed in said space and seated on said landing face, said supporting device engaging at least one of said teeth for suspending said hanger in said housing;
- sealing means comprising an annular metal sealing ring disposed in said space in surrounding relationship to at least one of said teeth and in sealing engagement therewith;
- and
- actuating means urging said sealing ring into said sealing engagement with said at least one tooth, comprising:
- a wedge disposed in said space and oriented to apply a radial inward force to said sealing ring in response to relative axial movement between said sealing ring and said wedge, and
- means for producing said relative axial movement.
5 more elements
A hanger assembly for a wellhead, comprising:
- a tubular housing having an inner surface;
- a tubular metal hanger suspended coaxially within said housing and spaced radially inwardly therefrom such that an outer surface of said housing and an inner surface of said housing form a space therebetween;
- a pack-off ring mounted in said space;
- and
- sealing means sealingly engaging said inner and outer surfaces, comprising:
- a first metal seal comprising an annular ring sealingly engaging said outer surface and including a radially outwardly facing first wedge surface,
- a second metal seal comprising an annular ring sealingly engaging said inner surface and including a radially inwardly facing second wedge surface,
- a sleeve including a portion interposed between said first and second wedge surfaces, said sleeve portion having first and second sleeve surfaces extending parallel to, and in engagement with, said first and second wedge surface, respectively,
- one of said first and second metal seals being seated on said pack-off ring, and
- a tool engaging the other of said first and second metal seals and applying thereto a downward force transmitted to said second metal seal through said sleeve portion, for wedging said second metal seal between said inner surface and said first sleeve surface, and wedging said first metal sleeve between said outer surface and said second sleeve surface.
7 more elements
Dependencies are inferred from the claim text.