Methods and oil-based settable spotting fluid compositions for cementing wells
US6668929B2 · kind B2 · utility
115Cited by
40References
54Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Dec 16, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods for cementing a pipe string in a well bore containing oil-based drilling fluid using oil-based settable spotting fluid compositions are provided. The oil-based settable spotting fluid compositions basically comprise an oil external emulsion comprising oil, water and an emulsifying surfactant; a hydraulically settable component; and a de-emulsifying surfactant for de-emulsifying the oil-external emulsion when the emulsion is cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.