Abstract: An apparatus for conditioning drilling fluid on a drilling rig or other location having a housing defining at least one inner chamber having a fluid inlet and a fluid outlet. At least one rotating ring, which is operationally attached to a drive shaft, and at least one stationary ring, are positioned in the inner chamber. The rotating ring further has movable geometric protrusions extending therefrom, while the stationary ring has stationary geometric protrusions extending therefrom. Selective rotation of the drive shaft causes the rotating ring and attached geometric protrusions to rotate. Drilling mud is pumped through the housing and is mixed at a very high rate without shearing or degrading entrained solids in the mud.