Hanger apparatus for suspending pipes with positive retrieval ca

Details Hanger apparatus for suspending pipes with positive retrieval ca Hanger apparatus for suspending pipes with positive retrieval ca

1979-09-17

1981-05-26

Leppink, James A.

Wells

Expansible anchor or casing

Liner hanger

166214, 285141, E21B 4310, E21B 2300

Patent

active

042692687

ABSTRACT:
A hanger apparatus for suspending an upright inner pipe from an outer pipe including a hanger body carried by the outer pipe, a hanger mandrel carried by the inner pipe, and a split locking ring carried in a recess in the hanger mandrel, the hanger body having a groove for receiving a rib on the locking ring and the hanger mandrel having a load-bearing shoulder received on a corresponding shoulder on the locking ring. The locking ring has a thick main body portion and a thin, flexible skirt depending therefrom. A rib on the hanger mandrel has an upwardly facing lifting surface for contacting a downwardly facing lifting surface formed as an upper wall in a transverse groove in the locking ring main body portion to provide a positive engagement during retrieval of the inner pipe. A guard rib below the lifting rib is releasably coupled to the hanger mandrel so the locking ring can be slipped into the mandrel with a minimum of distortion.

REFERENCES:
patent: 3227218 (1966-01-01), Fisher, Jr. et al.
patent: 3420308 (1969-01-01), Putch
patent: 3472530 (1969-10-01), Fowler
patent: 3625283 (1971-12-01), Ahlstone
patent: 3736984 (1973-06-01), Garrett
patent: 3800869 (1974-04-01), Herd et al.
patent: 3893717 (1975-07-01), Nelson
patent: 3918747 (1975-11-01), Putch
patent: 3944273 (1976-03-01), Ahlstone

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