Rotation release two-way well casing hanger

Details Rotation release two-way well casing hanger Rotation release two-way well casing hanger

1975-07-21

1976-12-28

Leppink, James A.

Wells

Expansible anchor or casing

166214, E21B 4310

Patent

active

039996042

ABSTRACT:
A well casing hanger for suspending a string of tubing from an outer casing landing nipple, with the hanger structure automatically engaging the nipple structure and latched to a locked state withstanding either suspended weight or upward pull in tension. Hanger structure release is provided by rotation of a member operating a threaded coupling on the upper end of the hanger-operating mandrel through providing a recess to accommodate internal lugs of locking keys so they can be cammed inwardly and unlocked with lifting upward movement of the hanger structure from the landing nipple.

REFERENCES:
patent: 2871947 (1959-02-01), Fredd
patent: 3105556 (1963-10-01), Raulins
patent: 3507329 (1970-04-01), Stone, Jr.
patent: 3543847 (1958-11-01), Haeber

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