They use wrenches to tighten connections and use grease guns to lubricate valves. In addition, gaugers take samples of oil from the tanks. Refinery operators are in charge of the oil processing. They figure out how to set the knobs and controls of the processing units. Refinery operators adjust the settings for each type of petroleum product.
Operators read processing schedules, operating logs, and test results.
They always monitor the machines while the crude oil is being processed. If they find a problem with equipment, then operators inspect the machinery. They may do the repair themselves or contact a repair person. Operators may perform basic maintenance, such as lubricating and cleaning the equipment. Control panel operators assist refinery operators.