Cementing with blast furnace slag using spacer
US5333690A · kind A · utility
8Cited by
41References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Dec 31, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/10
- WIPO fieldMaterials, metallurgy
- 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.