Application of muds containing scleroglucan to drilling large diameter wells
US5525587A · kind A · utility
2Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Nov 3, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present inventors found that the addition of scleroglucan, in particular of unrefined scleroglucan, to the water employed as drilling fluid for drilling wells requiring a high flow rate made it possible to limit formation leaching and improved the removal of cuttings. The invention may be applied to drilling of large-diameter wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.