To pull the pump rods out of the well and hang them in the derrick on rod hangers. On portable pulling units, the rods are hung outside the derrick. On shallow wells with short strings of rods, they may be pulled from the well by a simple pulling unit consisting only of a guyed mast. If this is the case, the rods are pulled, unscrewed and layed down, i.e., layed out horizontal on a rack.
