Method and system for harvesting weighting agent fines
US7370820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | May 28, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C23/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for harvesting weighting agent fines includes milling weighting agent into a plurality of pieces, classifying the pieces based on size to extract those particles having a particle size less than an acceptable maximum diameter, reclassifying the pieces based on size to extract those particles having a particle size less than an acceptable minimum diameter, collecting the particles having a particle size between the standard acceptable minimum and maximum diameters, and collecting the particles having a particle size less than the acceptable minimum diameter. A system for harvesting weighting agent fines includes a mill to reduce the weighting agent particle size, a first classifier to extract particles having a particle size less than the acceptable maximum diameter, a second classifier to extract particles having a particle size less than the acceptable minimum diameter, a fine particle collection area, and a coarse particle collection area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.