Drilling fluid component
US7220708B2 · kind B2 · utility
33Cited by
104References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2003 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Sep 8, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/5083
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method and composition is provided for a relative permeability modifying polymer for use with drilling fluids that comprises a water soluble polymer formed from a hydrophobic or hydrophobically modified hydrophilic monomer and a hydrophilic monomer. In an alternative embodiment, a method is provided for producing a water soluble polymer formed from a hydrophilic monomer for use as a relative permeability modifying polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.