Drilling fluids
US4605505A · kind A · utility
1Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1985 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Apr 2, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A drilling fluid is described, consisting essentially of sodium carboxymethyl cellulose, bentonite, water, and at least one compound selected from 2-mercaptobenzimidazole compounds, 2-mercaptobenzothiazole compounds, 2-mercaptothiazoline and 2-thioimidazolidone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.