Water-selective cementing composition
US6616751B1 · kind B1 · utility
9Cited by
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24Claims
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Key dates
| Filing date | Nov 13, 2000 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Nov 25, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/506
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cementing composition comprising a hydraulic cement powder dispersed in a solvent that is miscible both with water and hydrocarbons to make a slurry. The cement powder can be made up simply of hydraulic cement materials or can be a mixture of such materials with particles that are inert or reactive with cement. The composition can also include surfactants or retarders. The composition is used to plug water production in a well while leaving hydrocarbon production unaffected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.