Adjustable speed drive applications as related to the Oil sands process

There are currently a number of existing mega-projects as well as several new projects planned and under construction in the Athabasca Oil sands which utilize open pit mining as the method for the extraction. This technique, as opposed to SAGD (Steam Assist Gravity Drainage) and other in-situ methods, involves the handling of large quantities of the oil sand materials by conveyors, apron feeders, rotary breakers, cyclofeeders and a variety of pumps.This paper will cover the strategic importance and an overview of the oil sands, summarize the open pit mining process and associated adjustable speed drive applications with the primary focus being on the slurry and tailings handling pumps. Both slurry and tailings are of relatively high density (specific gravity) which makes the pumping of this material somewhat unique particularly to the petroleum industry. There appears to be a limited understanding even within the industry as to the requirements of this application which has led to design practices that appear to be overly conservative and costly with respect to motor and drive design and rating selections.