Well drilling fluids and methods
US5380706A · kind A · utility
39Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Mar 26, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Improved well drilling fluids and methods which prevent damage to water sensitive formations while drilling are provided. The drilling fluids include a formation stabilizing compound which contains an organic quaternary ammonium cation and an inorganic, organic or combination anion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.