Blast furnace slag spacer
US5316083A · kind A · utility
37Cited by
39References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Dec 31, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A spacer fluid containing blast furnace slag is utilized in a well drilling operation. In one embodiment an oil emulsion drilling fluid is displaced using spacer fluid comprising water, blast furnace slag and a surfactant. In another embodiment a spacer fluid comprising blast furnace slag and water is used in the cementing of an annulus surrounding a pipe with a blast furnace slag cementitious slurry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.