Isolation packer extension
US4296808A · kind A · utility
6Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1980 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Aug 4, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/146
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An isolation packer extension doubles the distance between upper and lower packer assemblies of an isolation packer so that less accurate positioning thereof is required when performing cementing operations from a floating vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.