Polymeric microspheres as degradable fluid loss additives in oilfield applications
US7748452B2 · kind B2 · utility
37Cited by
7References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2008 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Feb 19, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/426
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of plugging a fracture in a subterranean formation which includes placing into the fracture a composition comprising microspheres or microbeads, wherein the microspheres are created by surface crosslinking of droplets in a water-in-water emulsion. Such microspheres may form a filter cake in the formation. The microspheres may include a chemical agent to be released when the microspheres dissolve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.