Emergency casing hanger system

Details Emergency casing hanger system Emergency casing hanger system

1991-12-13

1993-06-29

Dang, Hoang C.

Wells

Expansible anchor or casing

Liner hanger

166217, 285141, 285144, 285323, E21B 3304

Patent

active

052225550

ABSTRACT:
An emergency casing hanger can be lowered over casing collars and into a wellhead housing to support a string of casing. The casing hanger has a slip bowl which is slotted so that it can be radially expanded to insert over the casing collar. Slips are carried in the interior of the bowl for gripping the casing once the slip bowl is in position. The running tool has an inner sleeve that holds the slips in a retracted position and holds the slip bowl in an expanded position until the slip bowl clears the collar. Once the running tool has been removed, a honing tool is then lowered over the casing. The honing tool has honing stones mounted in a housing and biased inward for smoothing the exterior of the casing to receive a seal.

REFERENCES:
patent: 2624413 (1953-01-01), Mueller et al.
patent: 2880806 (1959-04-01), Davis
patent: 3179448 (1965-04-01), Jones
patent: 3437356 (1969-04-01), Todd et al.
patent: 4465133 (1984-08-01), Bridges
patent: 4678209 (1987-07-01), Guice
patent: 4790379 (1988-12-01), Vanderford, Jr.
patent: 4982795 (1991-01-01), King

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