Drilling fluids with redispersible polymer powders
US8053394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2010 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Feb 18, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/516
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A drilling fluid has a redispersible polymer powder introduced as a water dispersion that is capable of providing a deformable latex film on at least a portion of a subterranean sand formation and which inhibits or controls fluid loss and acts as a sealing agent when used to drill in sand formations for hydrocarbon recovery operations. The redispersible polymer powder may be made by drying the emulsion in which they are formed and then grinding into a powder or by spray drying. The polymer particles of suitable size precipitate or collect or assemble onto the pores of a subterranean sand formation to at least partial seal the formation with a deformable polymer film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.