The one-circulation method is a well-control procedure. To implement this method certain guidelines must be followed to ensure a safe kick-killing exercise. Although the procedure is relatively simple, its mastery demands basic knowledge of the practical steps taken during the process. A kill sheet is normally used during conventional operations. It contains prerecorded data, formulas for the various calculations, and a graph--or other means--for determining the required pressures on the drillpipe as the kill mud is pumped.