Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent
1981-09-08
1983-12-27
Novosad, Stephen J.
Wells
Submerged well
Connection or disconnection of submerged members remotely...
166 75A, 285141, E21B 4301
Patent
active
044225075
ABSTRACT:
There is disclosed apparatus for use in suspending concentric strings of casing of an offshore well at the ocean floor, wherein at least one hanger for suspending an intermediate casing string is provided with a plurality of vertically spaced, upwardly facing seating surfaces which extend radially inwardly from its bore, and the outer side of such hanger body has a recess thereabout in which a radially expandable ring having a plurality of vertically spaced, downwardly facing landing surfaces is received. As the intermediate hanger body is lowered into the bore of an outer hanger having vertically spaced, upwardly facing seating surfaces extending radially outwardly from its bore, the ring expands radially outwardly to move its landing surfaces into supported positions on the seating surfaces of the outer hanger. As an inner hanger is lowered into the bore of the intermediate hanger, landing surfaces on a radially expandible ring carried within a recess about the outer side of its body are caused to expand with the ring into supported positions on the seating surfaces of the intermediate hanger body. The seating surfaces within the bore of the intermediate hanger body and the recess about its outer side in which the expandible ring is received are on generally the same vertical line.
REFERENCES:
patent: 3492026 (1970-01-01), Ahlstone
patent: 3837684 (1974-09-01), Hynes
patent: 3913670 (1975-10-01), Ahlstone
patent: 4046405 (1977-09-01), Bonds
patent: 4053023 (1977-10-01), Herd et al.
patent: 4167971 (1979-09-01), Cowan
patent: 4171018 (1979-10-01), Walker
patent: 4232889 (1980-11-01), Potch
patent: 4295665 (1981-10-01), Pierce
patent: 4343495 (1982-08-01), Nobileau et al.
Dril-Quip Inc.
Neuder William P.
Novosad Stephen J.
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