Table 2 Slurry characteristics

Density of primary phase: CMC-Bentonite solution

1200 kg/m.³

Non-Newtonian Rheology parameters of CMC-Bentonite solution

Consistency index (K) 2.191728

Power law index (n) 0.46

Yield stress threshold 7.5168 Pa

Critical shear rate 100 s⁻¹

Density of secondary phase: sand

2650 kg/m.³

Particle sizes (mm)

1, 0.95, 0.93, 0.9, 0.87, 0.85, 0.8, 0.75, 0.72, 0.7, 0.68, 0.65, 0.6, 0.5

Inlet cuttings concentration

8%, 10%, 12%, and 14%

Slurry inlet axial velocity

1 m/s and 3.5 m/s

Inner wall rotation

50 rpm and 100 rpm