Nine distinct mud systems are defined here. The first seven are water-based, while the eighth is oil-based. The ninth category is a specialized one in which air or gas is the continuous fluid. The 9 categories are:
Cyclone, A liquid-solids separation device which utilizes centrifugal force to speed up settling. Drilling fluid is pumped tangentially into a cone and the rotation of the fluid provides centrifugal force to separate particles by mass weight – the heavier solids being separated from the light solids and liquid.
A mud cleaner is a combination of desanders and/or desilters to remove drilled solids from mud. -wiki
Mud cleaners can be leased, rented, purchased as independent units, or assembled on location. When mud cleaners were invented in 1971, main shale shakers on drilling rigs were either unbalanced elliptical or circular motion machines.
Discrete Element Method (DEM) is attracting increasing interest for the simulation of Drilling fluid flow, much of the previous DEM modelling has considered two-dimensional (2D) flows and used circular solids particles in drilling fluid. The flow of particulate materials plays a critical role in dilling mud processes.