Rotary slip is a circular wedge-shaped device made of steel with teeth or other gripping devices that fits into the slip bowl of a rotary table. Rotary slip is designed to hold the string of drill pipe in the well when it is not suspended from the traveling block and hook or elevators. This slip is made with three or more segments of cast iron honeycomb that is hinged to fit around the pipe. The outer diameter of the rotary slip has an inward angle of about 9.5°. The inner surface has a set of jaws for biting the pipe.
Rotary soot blower is used to clean convection surfaces of boiler tubes, economizers or tubular reheaters of field erected or packaged industrial boilers. It is suited for environments with temperatures up to 800° C. It is supplied with either a mass blowing or lane blowing arrangement.