Non-ferromagnetic overburden casing
US7793722B2 · kind B2 · utility
94Cited by
814References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2007 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | May 9, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S166/902
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one system for electrically insulating an overburden portion of a heater wellbore is described. The system may include a heater wellbore located in a subsurface formation and an electrically insulating casing located in the overburden portion of the heater wellbore. The casing may include at least one non-ferromagnetic material such that ferromagnetic effects are inhibited in the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.