Means for relieving load on stacked casing hangers

Details Means for relieving load on stacked casing hangers Means for relieving load on stacked casing hangers

1996-11-14

1998-09-29

Neuder, William P.

Wells

Processes

Placing or shifting well part

166 893, 166208, 2851233, E21B 4310

Patent

active

058134700

ABSTRACT:
Using additional load shoulders on wellhead casing hangers when multiple casing hangers are needed increases the capacity of the casing hangers to withstand loads. The shoulders of the casing hangers are not required to land simultaneously. Either the upper or lower set of shoulders may contact prior to the other, with the first set to make contact plastically or elastically deforming to allow the other set to land. Other tubular members, such as a test plug may be inserted to pressure test the shoulders of the casing hanger for a casing string that is supported by the casing hanger.

REFERENCES:
patent: 3297344 (1967-01-01), Hanes
patent: 4167970 (1979-09-01), Cowan
patent: 4460042 (1984-07-01), Galle, Jr.
patent: 4826216 (1989-05-01), Hynes et al.
patent: 4842307 (1989-06-01), Sweeney et al.
patent: 4919460 (1990-04-01), Milberger et al.
patent: 5044432 (1991-09-01), Cunningham et al.
patent: 5327966 (1994-07-01), Reimert
patent: 5464063 (1995-11-01), Boehm, Jr.

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