Hydraulic operated casing hanger running tool

Details Hydraulic operated casing hanger running tool Hydraulic operated casing hanger running tool

1977-04-04

1978-01-10

Leppink, James A.

Wells

Expansible anchor or casing

Liner hanger

166212, E21B 4310

Patent

active

040673880

ABSTRACT:
A well tool for running and landing underwater casing hangers. The tool includes a resilient split ring with external threads that engage complementary internal threads on the hanger, and an hydraulic system that is actuated through a control line at the surface, thereby facilitating release of the hanger from the tool by either hydraulic pressure or rotation of the running string to which the tool is attached.

REFERENCES:
patent: 3450421 (1969-06-01), Harwell, Jr.
patent: 3543847 (1970-12-01), Heaber
patent: 3827488 (1974-08-01), Piazza et al.
patent: 3885625 (1975-05-01), Ahlstone
patent: 3897823 (1975-08-01), Ahlstone
patent: 3918747 (1975-11-01), Putch

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