Dewatering of drilling mud using a filter press
US9138668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2010 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Apr 8, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/066
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of separating a mixture of liquid and insoluble solids in a filter press may comprise: diluting the mixture; adding a flocculating agent to the diluted mixture and stirring to form a chemically processed mixture; pumping the chemically processed mixture into a chamber between two filter plates in the filter press to form a filter cake, wherein the chamber is lined by filter cloths, and wherein, during the pumping, filtrate is forced through the filter cloths and out of the chamber; heating the filter cake in the chamber, wherein, during the heating, filtrate is forced through the filter cloths and out of the chamber; and releasing dried filter cake from the chamber. Furthermore, before the diluting, additional solids may be added to the mixture. The method may be used to dewater drilling mud, and mixtures of drilling mud with drill cuttings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.