Water-based drilling fluids containing crosslinked polyacrylic acid
US9803129B2 · kind B2 · utility
2Cited by
6References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2014 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Nov 14, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water-based drilling fluid containing high molecular weight crosslinked polyacrylic acid as viscosifying agent exhibits stability at well temperatures in excess of 150° C. The drilling fluid may further contain a lubricant, weighting agent and/or a wetting agent as well as laponite clay. The aqueous based drilling fluid exhibits a coefficient of friction which is substantially close to the coefficient of friction of oil based drilling muds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.