Subsea casing hanger suspension system

Details Subsea casing hanger suspension system Subsea casing hanger suspension system

1983-09-26

1986-06-17

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166217, 285141, E21B 4301, F16L 3500

Patent

active

045950636

ABSTRACT:
A subsea well casing suspension system whereby each of a plurality of concentric casing strings and its hanger is directly and totally supported on the wellhead housing, independently of all the other strings and their hangers, by a plurality of load ring slips that are components of a packoff assembly for an earlier installed casing string. When the packoff assembly is pressure tested following its installation, the load ring slips rise off the assembly and expand into their mating wellhead housing groove wherein they function to transmit the total hang load of the next casing string and hanger directly to that housing.

REFERENCES:
patent: 3090438 (1963-05-01), Raulins
patent: 3105552 (1963-11-01), Haeber et al.
patent: 3913670 (1975-10-01), Ahlstone
patent: 4295665 (1981-10-01), Pierce
patent: 4422507 (1983-12-01), Reimert

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