Cement set activators for set-delayed cement compositions and associated methods
US9920235B2 · kind B2 · utility
3Cited by
75References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 2016 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | May 23, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed herein are cement compositions and methods of using set-delayed cement compositions in subterranean formations. In one embodiment, a method of cementing in a subterranean formation is described. The method may comprise providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder; activating the set-delayed cement composition with a liquid additive to produce an activated cement composition, wherein the liquid additive comprises a monovalent salt, a polyphosphate, a dispersant, and water; and allowing the activated cement composition to set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.