Nontoxic, nonchloride, water-base, inhibitive fluid to stabilize water sensitive shale
US5198415A · kind A · utility
22Cited by
11References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jan 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A nontoxic, nonchloride, water-base drilling fluid which stabilizes water sensitive shales is disclosed. This drilling fluid is comprised of the potassium or ammonium salt of an organic acid in combination with a polar organic liquid, so as to reduce shale swelling with mineral adverse impact on the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.