Aqueous well-drilling fluids
US4230586A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1978 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Aug 7, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Aqueous well-drilling fluids treated with additives comprising a non-Newtonian colloidal disperse system containing metal-containing particles, a dispersing medium and an organic compound having both a hydrophobic and a polar substituent in combination with at least one emulsifier are disclosed. Specific examples of the disperse system comprise calcium carbonate particles predispersed in a mineral oil dispersing medium in the presence of a calcium petrosulfonate; useful emulsifiers include alkylene oxide/fatty amine condensates. Well-drilling fluids containing such additives reduce the torque requirements in rotary drilling operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.