In geo-technical engineering, drilling fluids is used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling rigs, drilling fluids is also used for much simpler boreholes, such as water wells. Liquid drilling fluids is often called drilling mud. The three main categories of drilling fluids are water-based muds ( which can be dispersed and non-dispersed ), non-aqueous muds, usually called oil-based mud, and gaseous drilling fluids, in which a wide range of gases can be used.

Solids control is a technique used in drilling rig to separate the solids in the drilling fluids that are crushed by the drill bits and carried out of the well surface. Normally solids control system is consisted of five stages, including mud tank, shale shaker, vacuum degasser, desander, desilter, centrifuge. Shale shaker is used to separate the big solids with diameter above 75μm, and 45~74μm for desander, and 15~44μm for desilter. Sometimes desander & desilter are combined as highly efficient mud cleaner. When air enters the drilling fluids, vacuum degasser is used to separate the air. If no air is found in the mud, the degasser will work as a big agitator. All these equipment are mounted on the top of the mud tank. After separating the solids, the clean mud will be pumped into the borehole again.

We always need some different pumps in drilling fluid solids control to pump the drilling fluids in different processes.Now, let's see those pumps.
 

Centrifugal Pump

KOSUN CP Series Centrifugal Pump is used for transporting drilling mud. It can be used as feeding pump for desander, desilter, or used as mixing pump for jet mud mixer. Also it can be used as trip pump and supercharging pump for rig mud pump.

Shear Pump

KOSUN SP Shear Pump is mainly used for a quick concoction of high-performance mud so that the time spent on it will be greatly shortened and economic benefits of wells increased.
 

Submersible Slurry Pump

KOSUN LSP Series Submersible Slurry Pump is mainly used for environmental protection, new type building materials, coal washing, municipal projects, thermal power generation, coal gas coking plant, refinery, steel mills, mining, paper making, cement plant, food products factory and other fields to perform pumping of thick oil, oil residue, dirty oil, mud, mortar, running sand and other liquids from the municipal sewerage. It is also suitable for pumping liquids with silt particle and corrosive liquid.

Screw Pump

The screw pump is an ideal pump to feed drilling fluids to decanter centrifuge since drilling fluids is pushed to proceed along axial direction evenly. Therefore, the inner flow speed is kept low, volume unchanged and pressure stable so that vortex and agitation are prevented. Screw Pump is useful for wet mud drilling waste management and cuttings transportation.