Well sealing system
US4288082A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1980 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Apr 30, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.