Drilling fluid processing
US9518435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2012 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Oct 1, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/262
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of processing a return oil-based drilling fluid includes centrifuging a primarily fluids phase at a first speed and separating the primarily fluids phase into a first effluent and a first residual, centrifuging the first effluent at a second speed and separating the first effluent into a second effluent and a second residual, and centrifuging the second effluent at a third speed and separating the second effluent into a third effluent and a third residual. A surfactant, a polymer, combinations of surfactant(s) and polymer(s) and/or a wash water may be added to one or more of the return oil-based drilling fluid, the primarily fluids phase, the primarily solids phase, the first effluent, the second effluent, and the third effluent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.