Well sealing system

Details Well sealing system Well sealing system

1980-04-30

1981-09-08

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

166118, F16J 1528

Patent

active

042880823

ABSTRACT:
A well sealing system for blocking fluid flow through an annulus partially defined by a tubing string disposed within a casing string. A metal seal ring is compressed and radially expanded to form a primary metal to metal seal between the exterior of the tubing string and the interior of the casing string. A production well packer and packing rings are carried by the tubing string to form secondary elastomeric to metal seals between the tubing string and casing string. Backup rings are provided to control the extrusion of the metal seal ring while it is compressed and radially expanded. A protective cylinder is also provided to prevent damage to the packing rings and the metal seal ring while the tubing string is lowered through the bore of the casing string. The protective cylinder assists in setting the production packer while the metal seal ring is being compressed.

REFERENCES:
patent: 609752 (1898-08-01), Angell
patent: 1246957 (1917-11-01), Lindsay
patent: 1336738 (1920-04-01), Fletcher
patent: 1826967 (1931-10-01), Thomas
patent: 1882230 (1932-10-01), Nixon
patent: 2315921 (1943-04-01), Baker
patent: 3531236 (1970-09-01), Braddick et al.
patent: 4106565 (1978-08-01), Braddick
patent: 4127168 (1978-11-01), Hanson et al.
patent: 4178992 (1979-12-01), Regan et al.

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