OIL & GAS CASE STUDY Spherical Butane Gas Tank Inspection ? Customer? Oil & Gas refinery (confidential) ? Inspection overview? Inspection of the inside of a spherical gas tank to verify the weldings and general condition. Pre-Planning / Planning / Process / Customer Need / Acceptance Criteria? The single tank to inspect was a 12 meters wide sphere under renovation. Instead of sending a technician inside the tank, which may have had residual dangerous gas in it even though it had been cleaned, the Skycopter indoor drone allowed to complete a visual inspection safely.? The only accessible manhole was on top of the tank. The flight plan was divided in two parts: a generic inspection from the center and a close up of part of the weldings. Service pipes run vertically down the tank, maki

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