Swivel assembly

Details Swivel assembly Swivel assembly

1975-07-28

1977-06-21

Leppink, James A.

Wells

Expansible anchor or casing

Liner hanger

166177, 308 9, E21B 4310

Patent

active

040305465

ABSTRACT:
Disclosed is a swivel assembly with multiple fluid bearings. The embodiment shown is a rotatable liner swivel assembly to be used, in conjunction with a liner hanger, cam dog assembly, and setting tool, for placing and cementing a liner in a well. Fluid-filled annular bearing chambers in the swivel assembly support the load of the liner pipe string, and permit the rotation of the liner pipe string with respect to the liner hanger during the cementing process. The bearing chambers are interconnected to equalize the fluid pressure and distribute the load uniformly over the bearing chambers.

REFERENCES:
patent: 2609881 (1952-09-01), Warren
patent: 2883156 (1959-04-01), Davenport
patent: 3223170 (1965-12-01), Mott
patent: 3493273 (1970-02-01), Greenberg
patent: 3720271 (1973-03-01), Kern
patent: 3777819 (1973-12-01), Delano
patent: 3866988 (1975-02-01), Striegler
patent: 3920075 (1975-11-01), Braddick et al.

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