Abstract: A robot for servicing metal equipment in a hydrocarbon refinery includes a robot. The robot includes a body and a plurality of magnetic wheels operatively attached to the body. The plurality of magnetic wheels are operable to attached the robot to a metal surface of the metal equipment. The robot also includes a plurality of propellers coupled to the body of the robot.

Abstract: A system for chemical processing includes a hollow structure including a side wall having an exterior surface and an interior surface defining an internal volume. The hollow structure has a center axis, a length, and an outer perimeter. The outer perimeter is a shape of the exterior surface of the side wall of the hollow structure in a plane perpendicular to the center axis. The system includes a metallic object positioned within the internal volume of the hollow structure. The system also includes at least two magnets slidably coupled to the exterior surface of the side wall, where the magnets guide movement of the at least one metallic object within the hollow structure. The magnets operate to impact the metallic object against the solid deposits to loosen the solid deposits from the interior surface of the side wall.