Method for reducing the rheology of high internal-phase-ratio emulsion wellbore fluids
US11634620B2 · kind B2 · utility
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26Claims
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Key dates
| Filing date | Apr 29, 2014 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Jul 3, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An invert emulsion fluid may include a oleaginous external phase, a nonoleaginous internal phase, wherein a ratio of the oleaginous external phase to nonoleaginous internal phase is less than 55:45, a emulsifier, a particulate weighting agent dispersed in the non-oleaginous internal phase, and a viscosifier stabilizing the dispersion of the particulate weighting agent in the non-oleaginous internal phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.