Conversion of oil-base mud to oil mud-cement
US5476144A · kind A · utility
83Cited by
23References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Sep 20, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A water-in-oil emulsion drilling fluid can be converted into an oil mud-cement slurry for use in oil well cementing procedures. Also, a universal fluid can be prepared using the water-in-oil emulsion drilling fluid by treating with an hydraulic material so that it will lay down a filter cake during drilling which can be triggered to set into a hard cement and bond to the formation after the above oil mud-cement slurry has been placed in the borehole at the conclusion of drilling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.