How To Calculate Drilling Mud “ Lag Time “ & Wellbore Wall " Wash Out “ 

It is better to be: Dr. Helmi students, Drilling Fluids Engineering course: In this video,the 2 important equations of Lag time - in pump strokes - calculations are shown. One equation quantifies Lag In and the other Lag Up. Wash Out in Barrels/Mud is also calculated/explained. Lag Time in - Pump Strokes - is of daily use by the Drilling Rig Team, Wellsite Geologist, and Mud Logging Team. It accurately determines the "Wash Out" in Barrels. Part I of my Drilling Fluids Engineering Course. Enjoy the Video.