Wellhead load supporting system

Details Wellhead load supporting system Wellhead load supporting system

1988-05-24

1989-06-27

Novosad, Stephen J.

Pipe joints or couplings

Pipe to discreet nipple or sleeve to plate

Expandable detent engages plate to hold nipple

2851332, E21B 33047, F16L 312, F16L 700

Patent

active

048423076

ABSTRACT:
A wellhead housing has features to increase the load carrying capabilities. The wellhead housing has a inclined load shoulder. A lower casing hanger which supports the outer string of casing is supported on the load shoulder. A landing profile locates between the load shoulder and the casing hanger. The landing ring has a cylindrical portion both above and below the load shoulder. These cylindrical portions restrain the material of the wellhead housing from yielding downward and inward. Also, a support ring encircles the wellhead housing on the exterior radially outward from the load shoulder. The support ring is fitted to the wellhead housing in an interference fit to provide a preload compressive force. Additional casing hangers for intermediate and inner strings are supported on the lower casing hanger.

REFERENCES:
patent: 2034698 (1936-03-01), Hild
patent: 2230421 (1941-02-01), Works
patent: 3062565 (1962-11-01), Word, Jr.
patent: 3080180 (1963-03-01), Rector
patent: 3105552 (1963-10-01), Haeber et al.
patent: 3190354 (1965-06-01), Stone
patent: 3209829 (1965-10-01), Haeber
patent: 3268242 (1966-08-01), Bishop et al.
patent: 3354962 (1967-11-01), Pierce, Jr.
patent: 3405956 (1968-10-01), Pierce, Jr.
patent: 3871449 (1975-03-01), Ahlstone
patent: 4109942 (1978-08-01), Morrill
"Mathematical Modelling of 15 M Subsea Wellheads" 9/24/82.

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