Wells – Expansible anchor or casing – Liner hanger
Patent
1989-03-16
1990-03-27
Novosad, Stephen J.
Wells
Expansible anchor or casing
Liner hanger
166212, E21B 2302
Patent
active
049112376
ABSTRACT:
A tool for running in a liner hanger and a depending lining string comprises a tubular body having telescopically related inner and outer tubular units which are shearably interconnected for co-rotation. A plurality of downwardly projecting tongues are provided on the periphery of the outer tubular unit and respectively engage upwardly facing grooves provided in the liner hanger to impart rotation in either direction to the liner hanger. A downwardly extending mandrel secured to the inner tubular unit extends through the outer tubular unit and provides a mounting for the ring portion of a collet. The collet has spring biased arms mounting head portions which respectively engage in an annular groove provided in the liner hanger to secure the running tool to the liner hanger for run-in purposes. The collet is normally released from the running tool by a fluid pressure actuated piston mounted on the mandrel. In an emergency, the inner tubular unit may be shearably released from the outer tubular unit and moved downwardly with respect to the outer tubular unit, thus permitting the release of the collet heads from the liner hanger.
REFERENCES:
patent: 4497371 (1985-02-01), Lindsey, Jr.
patent: 4562889 (1986-01-01), Braddick
patent: 4688642 (1987-08-01), Baker
patent: 4834185 (1989-05-01), Braddick
Baker Hughes Incorporated
Melius Terry Lee
Novosad Stephen J.
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