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Slurry pipeline systems are used for the extraction of bitumen from mined ore in the oil sands industry in Alberta, Canada. Most of these extraction processes are open to atmosphere resulting in significant air ingress and entrainment within the slurry pipelines used to transport mined ore and tailings. In addition, for short hydrotransport slurry pipelines, the slurry is conditioned by air to create bubbles coated with a bitumen film called “air-sacks”.
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Close interval surveys (CIS) and remote monitoring units (RMUs) can be used as complimentary technologies, essential for validating safe operation of a cathodic protection (CP) system. CIS on a pipeline is typically performed once every few years due to the high cost and time commitment of the process, but the benefit is a high spatial resolution of measurements, with typical spacings between reading locations on the metre length-scale. RMUs installed at test posts with a typical spacing of multiple kilometres between units can be used to measure comparable electrical readings year-round without requiring a human to physically travel to each location.