Additive for drilling fluid used as a shale stabilizing agent in subterranean wellbores
US9550932B1 · kind B1 · utility
0Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2015 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Jun 10, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An additive for drilling fluid used as both a sealing agent to prevent seepage loss and a shale stabilizing agent in subterranean wellbores. The additive includes ground bituminous coal having a selected particle size distribution wherein the bituminous coal is between 60% to 80% of the additive by weight. The additive also includes solvent extracted ground flaxmeal which is between 20% to 40% of the additive by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.