Page 185 - Shale Shakers Drilling Fluid Systems
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168 SHALE SHAKERS AND DRILLING FLUID SYSTEMS
FIGURE 8-4. Effect of removal efficiency on drilling fluid requirements for maintaining a 4% volume of drilled solids.
FIGURE 8-5. Effect of removal efficiency on drilling fluid requirements for different discard wetness and target
drilled solids concentrations.
moval efficiencies (Figure 8-6). For example, as- after drilling 200 bbl of hole, the removal efficiency
sume that the surface volume is 1000 bbl and 2% is 60%. This same calculation can be made in terms
volume bentonite is added to the new drilling fluid. of the drilled solids concentration for any density
As shown in Figure 8-6, if the mud weight is 9.3 ppg drilling fluid as illustrated in Figure 8-7.
