Modified epoxy-amine compositions for oil field uses
US7723273B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2009 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Dec 23, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compressible and resilient sealing compositions for injection into oil or gas wells are provided, which are capable of forming effective seals adjacent well casings even at elevated downhole temperatures. The compositions comprise an epoxy component present in a predominant weight percentage, including an epoxy resin and a glycidyl ether modifier, as well as additional components rendering the cured compositions both compressive and resilient. The compositions are used as a partial or complete substitute for casing cements, and can be used to good effect with expandable casing installations or for sealing casing breaks. High set-up temperature (220-300° F.) compositions preferably include an ethoxylated alkyl (C10-C20) monoamine or diamine, and alkyl pyridine quaternary ammonium components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.