Method for applying remedial cement to a wellbore
US8163679B2 · kind B2 · utility
1Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2009 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Nov 12, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cement composition and method of applying remedial cement to a downhole perforation is described. The method involves the sequential delivery of a phosphate acid activator and a silicate suspension to the perforation to allow in situ reaction of the activator with the binder within the perforation, thereby forming a phosphosilicate plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.