Inflatable packer with roughened mandrel
US4871179A · kind A · utility
10Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1983 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Jan 24, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1277
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An inflatable packer including a tubular mandrel, a pair of collars secured to the mandrel, and an inflatable sleeve connected between the collars about the mandrel. The exterior surface of the mandrel underlying the sleeve is roughened to increase the coefficient of friction between the mandrel and the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.