In geotechnical engineering, drilling fluid 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 are also used for much simpler boreholes, such as water wells. Liquid drilling fluid 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 mud, usually called oil-based mud, and gaseous drilling fluid, in which a wide range of gases can be used.

The main functions of drilling fluids include providing hydrostatic pressure to prevent formation fluids from entering into the well bore, keeping the drill bit cool and clean during drilling, carrying out drill cuttings, and suspending the drill cuttings while drilling is paused and when the drilling assembly is brought in and out of the hole. The drilling fluid used for a particular job is selected to avoid formation damage and to limit corrosion.
 

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 75 μm, and 45~74 μm for desander, and 15~44 μm for desilter. Sometimes desander & desilter are combined as high efficient mud cleaner. When air enters into the drilling fluids, vacuum degasser is used to separate the air. If no air in the mud, the degasser would work as a big agitator. All these equipment are mounted on the top of the mud tank. After separating the solids, the clean mud would be pumped into the borehole again.

KOSUN exclusively handles oil & gas drilling fluids solid control equipment and solid control system, as well as varieties of chemical agent, such as drilling fluids shale shaker, desander, vacuum degasser, electrical ignition device, mud cleaner, sand pump, mud agitator, etc. KOSUN has been serving the oil & gas industry for 20 years since its establishment in 1992, and has obtained good experience on equipment manufacturing & oilfield service. Any further information, please feel free to contact us.