Emergency casing hanger

Details Emergency casing hanger Emergency casing hanger

1989-04-07

1990-08-21

Neuder, William P.

Wells

Expansible anchor or casing

Liner hanger

166217, 285145, E21B 2300, E21B 3304

Patent

active

049497863

ABSTRACT:
An emergency casing hanger and packoff allows casing to be set when it has been stuck. The hanger has a slip body that slides over the casing after the casing is cut. The slip body lands in a wellhead housing. The slip body has a bowl which carries slips for gripping the casing. A split ring carried by the body engages a recess in the wellhead housing to lock the hanger in place. A wedge moves the split ring outward when rotated by a running tool. An energizing ring carried by the slip body moves the slips downward to energize them. The packoff has a metal seal ring with an annular cavity, defining inner and outer faces. The inner face contains a plurality of deformable bands. A wedge member urges the faces apart, causing the bands to deform and seal against the casing.

REFERENCES:
patent: 2692066 (1954-10-01), Conrad
patent: 4750559 (1988-06-01), Greenlee et al.
patent: 4791987 (1988-12-01), Cassity et al.
patent: 4832125 (1989-05-01), Taylor

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