Compositions and methods for well completions
US11299958B2 · kind B2 · utility
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12Claims
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Assignee
Inventor
Key dates
| Filing date | Aug 5, 2015 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Aug 5, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Expansive cements for use in cementing subterranean wells comprise water, an inorganic cement and one or more particulate materials that swell upon contact with a water-immiscible fluid. The cements may further comprise a water-immiscible fluid. Such cements are designed to seal microannuli arising from the presence of water-immiscible fluids on casing surfaces, borehole wall surfaces or both.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.