Invert emulsions for well-drilling comprising a polydiorganosiloxane and method therefor
US4381241A · kind A · utility
48Cited by
12References
20Claims
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Key dates
| Filing date | Feb 23, 1981 |
| Grant date | Apr 26, 1983 |
| Priority date | — |
| Expiry date | Feb 23, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The preparation of emulsions of light and heavy brines in a liquid hydrocarbon is described, using a polydiorganosiloxane bearing at least one polyoxyalkylene radical and at least one monovalent hydrocarbon radical having from 6 to 18 carbon atoms. The emulsions are useful in the well-drilling art as drilling fluids, completion fluids, packer fluids, spacer fluids and workover fluids because of their thermal stability and because they can be formulated to have a relatively high density, with or without added weighting agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.