Aqueous cement compositions incorporating particles that are activated to control rheology when water soluble portions of the particles are released in the presence of water
US10858570B2 · kind B2 · utility
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12References
1Claims
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Key dates
| Filing date | Jul 13, 2013 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | May 29, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides strategies for improved control of fluid loss, hydration, settling, and separation of aqueous cementing compositions over a wide temperature and time range. The present invention is based at least in part upon water-effusing particles used as additives for the compositions, wherein the particles are activated to control rheology when water soluble portions of the particles are released in the presence of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.