Longest Uncased, Drill Mud-filled Bore

Jul 11th, 2013
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The longest, roughly 2,800 feet/800 meters, uncased, drill mud-filled bore was grouted in summer 2011 in Vancouver, British Columbia. The project, called Vancouver Central City Transmission (VCCT), was drilled by Michels Corp. of Canada. (The opening photo also represents this project.)

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