Well treating method to prevent or cure lost-circulation
US7331391B2 · kind B2 · utility
15Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2004 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | May 10, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of preventing or treating lost circulation during the drilling of a well comprises the addition, at concentration ranging between about 0.5 and 6 pounds per barrel, of water-dispersible fibers having a length between about 10 and 25 mm, for instance glass or polymer fibers, to a pumped aqueous base-fluid including solid particles having an equivalent diameter of less than 300 μm The base-fluid with the solid particles can be the drilling fluid or a small-volume pill specially pumped for curing lost circulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.