Solid material comminution or disintegration – Processes – With classifying or separating of material
Reexamination Certificate
2008-05-13
2008-05-13
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Processes
With classifying or separating of material
C241S029000, C241S079000, C241S080000
Reexamination Certificate
active
07370820
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.
REFERENCES:
patent: 6180573 (2001-01-01), Nattier et al.
patent: 6548452 (2003-04-01), Nattier et al.
Browne Neale
Kapila Mukesh
M-I L.L.C.
Rosenbaum Mark
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