Water-based drilling fluids with high temperature fluid loss control additive
US5789349A · kind A · utility
49Cited by
33References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1996 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Mar 13, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to an improved water based drilling fluid containing a controlled cross-linked polymeric fluid loss control agent. The novel polymeric fluid loss control agent of this invention exhibits improved thermal stability and other enhanced drilling fluid additive properties. The controlled cross-linking of the polymer of this invention results from the addition of specific amounts and types of cross-linking agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.