HDD Drilling Fluid Calculator Based on a 100 gallon mix tank 1 Enter Bore Diameter in inches 2 Enter length in feet 3 Formation Funnel Viscosity ----Select---- COBBLE SAND & GRAVEL SANDY CLAY CLAY REACTIVE CLAY 4 Choose Your Fluid Make-up ----Select---- Tru-Bore Tru-Bore & Uni-Drill Tru-Bore & Wyo-Vis LVP Extra High Yield & Claymaster Ext Hi Yield & Uni-Drill Ext Hi Yield & Wyo-Vis LVP Wyo-Vis DP Wyo-Vis HP Wyo-Vis LVP Borzan Kwik-Vis D