Alternative method to cementing casing and liners
US6848505B2 · kind B2 · utility
71Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2003 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Jan 29, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of sealing casing or liners in a wellbore is described. The stands of casing or liner receive a jacket bonded to the outer surface. Preferably, the jacket is a rubber compound bonded to the outer wall. The formulation responds to well fluids to swell at a predetermined rate. The casing or liner can also be expanded with a swage preferably prior to the onset of significant jacket swelling. Packers and sealing hangers can be optionally added at the extremes of the casing or liner string to further secure against channeling between adjacent formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.