Polymers for use in drilling muds
US5032295A · kind A · utility
36Cited by
39References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1989 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Apr 25, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer for use as a deflocculant in drilling muds comprising at least one unsaturated carboxylic acid or its anhydride or salt, at least one unsaturated sulfonic acid or its salt, at least one unsaturated cationic-containing monomer, and optionally, one or more unsaturated non-ionic monomer and/or one mono or di phosphate ester of an unsaturated alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.