Drilling mud viscosifier
US4255268A · kind A · utility
16Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1978 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Jul 14, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water-based, clay-free drilling fluid for use in drilling bore holes into subterranean formations having an aqueous mixture therein comprising water and a ferric hydroxide compound. The aqueous phase of the drilling fluid has the ferric hydroxide agent therein in an amount sufficient to impart non-Newtonian, pseudoplastic properties to the fluid at a pH of at least about 8. The present invention further relates to an improved process of drilling bore holes into subterranean formations using the subject drilling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.