Method and composition for curing lost circulation
US8946133B2 · kind B2 · utility
7Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2009 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | May 14, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition made of fibers and a material able to exhibit reverse solubility has utility for treating subterranean wells. The composition may used to cure lost circulation. The composition may be added to drilling fluids, spacer fluids or cement slurries. As the fluid temperature increases in a well, the reverse solubility material may precipitate and migrate to the fibers, causing the fibers to stick to each other and form a network, thereby forming a barrier that reduces further egress of treatment fluid from the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.