Well sealing system

Details Well sealing system Well sealing system

E - Fixed Constructions

21

B

166/64

E21B 33/128 (2006.01) E21B 33/12 (2006.01) E21B 33/129 (2006.01) F16J 15/28 (2006.01)

Patent

CA 1155389

WELL SEALING SYSTEM ABSTRACT OF THE DISCLOSURE 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 protec- tive cylinder is also provided to prevent damage to the pack- ing 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.

374894

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