Wells – Expansible anchor or casing – Spring set
Patent
1979-10-10
1981-07-07
Leppink, James A.
Wells
Expansible anchor or casing
Spring set
166217, F16L 3900, E21B 4310
Patent
active
042769329
ABSTRACT:
A well casing hanger assembly for releasably connecting a first well casing to and from a second member by a resiliently self-expandable and contractible C-shaped spring support ring. The ring is positioned in a recess in the hanger body between stop shoulders for axially slideable movement thereon and is engageable with a locking means for locking the spring support in an expanded position. Coacting engagement between the hanger body and the support ring allows longitudinal movement of the support ring relative to the body but prevents rotational movement of the support ring relative to the body. A fluid flow slot is positioned in the periphery of the hanger body and is aligned with the split in the C-shaped spring support ring for providing a larger bearing area between the support spring and the hanger body without a loss in fluid flow area. Preferably the flow slot includes a single flow slot resulting in a higher load capacity for the hanger and the coacting engaging means includes a vertical pin connected to the support ring engaging a groove in the hanger body.
REFERENCES:
patent: 3420308 (1969-01-01), Putch
patent: 3590922 (1971-07-01), Slack
patent: 3893717 (1975-07-01), Nelson
patent: 4181331 (1980-01-01), Cowan
Jansen Martin B.
Saliger Kenneth C.
Leppink James A.
NL Industries Inc.
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