Fluid loss control agent with triggerable removal mechanism
US7947627B2 · kind B2 · utility
2Cited by
23References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2006 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Jan 1, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/5083
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A fluid loss control pill or solution includes a polymer having a functional group that can be hydrolyzed by a base or a nucleophile. A method for fluid loss control in a subterranean formation includes placing a fluid loss control pill or solution in a wellbore penetrating the subterranean formation, wherein the fluid loss control pill or solution comprises a polymer having a functional group that can be hydrolyzed by a base or a nucleophile; and converting the polymer into a soluble form by hydrolyzing the functional group with a base or a nucleophile, when fluid loss control is no longer needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.