Degradable cement compositions containing degrading materials and methods of cementing in wellbores
US7677312B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2007 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Jul 30, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/487
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A temporary matrix is provided in treating a subterranean formation by providing a composition comprising a matrix forming material and a matrix degrading material. The matrix degrading material is capable of degrading the matrix after a period of time when subjected to existing or induced conditions of the subterranean formation. The composition is placed into a wellbore penetrating the subterranean formation. The composition is allowed to form a matrix within the wellbore, whereby the matrix at least one of significantly reduces the passage of fluid across or near the matrix or provides structural strength. A treatment operation is performed on the subterranean formation or wellbore and the degrading material is allowed to degrade the matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.