Retrievable packoff with an embedded flexible, metallic band
US4900067A · kind A · utility
12Cited by
22References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1989 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Jul 21, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A packoff (10) with an elastomeric seal ring (16) interposed between two metallic seal rings (12) and (14) with retrievable characteristics in the form of a relatively thin apertured curved cylindrical band (50) extending between the two metallic seal rings (12) and (14). The metallic band (50) is such that it does not interfere with the deformability of the elastomeric material when the packoff is set, but provides a mechanical connection between the upper and lower metallic rings (12) and (14) thus providing the packoff with retrievable capabilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.