Accelerated cement compositions and methods for treating lost circulation zones
US11453816B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2020 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Oct 13, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of treating a lost circulation zone in a wellbore includes contacting an accelerant composition comprising triethanolamine with a cement composition in the lost circulation zone, the cement composition comprising at least: from 1 weight percent (wt. %) to 90 wt. % cement precursor based on the total weight of the cement composition; and from 5 wt. % to 70 wt. % water based on the total weight of the cement composition; where a weight ratio of triethanolamine to the cement precursor is from 0.1 percent (%) to 60%; and curing the cement composition in the lost circulation zone to form a cured cement, where the triethanolamine accelerates the curing rate of the cement composition and the cured cement seals the lost circulation zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.