Compositions and methods for maintaining zonal isolation in a subterranean well
US9284477B2 · kind B2 · utility
0Cited by
5References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 16, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Mar 6, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Well cementing compositions comprise water, an inorganic cement and flexible particles having an average density higher than 1.5 g/cm3. The flexible particles may be elastomers. The flexible particles and cement particles may be present in a trimodal particle size distribution. The compositions may be placed in subterranean wells in the context of primary or remedial cementing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.