Temperature sensitive viscoelastic well-treatment fluids
US9228123B2 · kind B2 · utility
5Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Oct 26, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to fracturing fluids having temperature-sensitive viscosities. The fracturing fluids may include a mixture of a hydrophobically associative polymer (HAP) and a surfactant in an aqueous medium, wherein the surfactant imparts a critical solution temperature (CST) to the fluid. The fluid is more viscous at temperatures lower than the CST as compared to temperatures above the CST.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.