Drilling fluid comprising a vinyl neodecanoate polymer and method for enhanced suspension
US7572755B2 · kind B2 · utility
4Cited by
97References
22Claims
0Family size
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Key dates
| Filing date | Sep 5, 2003 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Dec 26, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/925
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An efficient oil based drilling fluid is provided that includes a polymer additive effective at imparting suspension characteristics without the presence of organophilic clays, while also providing filtration control. The fluid is shear thinning and has good fluid rheology over a broad temperature range. A preferred polymer for the additive is substantially linear and comprises mostly hydrophobic monomers and some hydrophilic monomers such as, for example, an emulsion copolymer of 2-ethylhexyl acrylate and acrylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.