Slurry comprising an encapsulated expansion agent for well cementing
US10941329B2 · kind B2 · utility
1Cited by
54References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2017 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | Apr 10, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods to prepare a well cementing slurry include coating particles comprising an expanding agent with a component selected from the group consisting of a phenolic resin, a silica, a calcination product of a polysiloxane oil, and a combination thereof; and combining the coated particles with mix water and hydraulic cement to form a cement slurry for cementing a well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.