Drilling fluids containing biodegradable organophilic clay treated with an amide-containing quaternary ammonium surfactant
US7781379B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2008 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Nov 8, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/91
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods are provided including methods of treating a well bore with drilling fluids comprising organophilic clays treated with quaternary ammonium surfactants having at least two amide linkages. In some embodiments, the methods comprise: providing a drilling fluid comprising a nonaqueous phase and an organophilic clay treated with a quaternary ammonium surfactant having at least two amide linkages; and placing at least a portion of the drilling fluid into the well bore. In other embodiments, the methods comprise combining an organophilic clay with a quaternary ammonium surfactant having at least one amide linkage to form a mixture, and combining the mixture with a fluid comprising a nonaqueous phase to form a drilling fluid. Additional methods are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.