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US 5,176,218 AGranted
Adjustable mandrel well casing hanger
AssigneeFMC Corporation
InventorsRoy E. Singer, Richard C. Lalor, Kenneth G. Rountree, Marcus A. Smedley, John H. Miller
Life of this patent
Estimating the term…
Abstract
A three-component adjustable mandrel well casing hanger that can be attached to the upper end of a tie-back sub or string to effect a tensioned connection between a subsea location and a surface wellhead of an offshore well.
Claims10
An adjustable mandrel hanger for supporting a pipe in a wellhead, said hanger comprising an assembly including
- a) an elongated tubular mandrel having upper and lower ends, a set of internal threads and an external annular shoulder for supporting said assembly in the bore of a wellhead component;
- b) a tubular hanger body having external threads that mate with the internal threads of the mandrel to interconnect said body and mandrel, and means to connect said body to a pipe to run the assembly into a wellhead;
- and
- c) a hanger neck connectable to the hanger body for extending said body beyond the upper end of the mandrel to a position for cooperation with an annular sealing means to seal an annulus between the hanger assembly and said wellhead component.
1 more element
Dependencies are inferred from the claim text.