Drilling fluids, the circulating fluid for drilling operations, is a mixture of the fluid, the solid and chemical agents. It is usually known as the “mud” or the “blood of drilling” deriving from its distinctive significance.

The solid in mud primarily includes concocting clay, weighting materials, drill cuttings and other solid substances. In terms of sources, it then comprises concocting clay, debris, weighting materials, solids from agents, etc.

Besides, different types of action of solids and ions in water can further categorize low-density solids into active and inert ones.

Active solids: Active solids tends to hydrate or react with other solids in the mud, They have higher surfactivity, larger specific surface area and more active electrochemical properties. And usually a closer unity exists between clays, clay and ions, clay and polymers. Active solids are also known as useful solids for their roles in mud property adjustment.
 

Inert solids: Inert solids refer to such inactive solids without any surface charge or possibility of electrochemical reaction as sands, flints, limestones, dolomites, some shales and various mineral mixtures. When they integrate, they can improve the mud properties by compressing active solids and increasing the viscosity, However, Inert solids are usually of no use, which another name“useless solids”derives from, and are corrosive to circulating equipment when the diameters are beyond 15μm, thus they are also known as harmful solids.

Rock cuttings, the major harmful solids in mud, can exert great influence on the mud properties as they add to the density, viscosity, yield point, water loss, abrasiveness, treacliness and flow resistance, and can trigger various bore hole complications like damage of formations, reduction of drilling velocity, increase of table torque, resistance of each trip, sticking drilling, leakage, blowout, etc.

About KOSUN

Established in 1992, KOSUN is the professional manufacturer of solids control system in China. KOSUN is a vital part of the world hydrocarbon exploration and production industry, as well as one of top three solids control equipment suppliers in China, which offers its products for CNPC, CNOOC, HH, Gazprom, RG, etc.

KOSUN is the professional manufacturer of solids control equipment, which is specialized in drilling decanter centrifuge,shale shaker, desander, desilter, mud cleaner, centrifugal pump, shear pump, mud tank, submersible slurry pump, mud agitator, jet mud mixer, mud gun and complete solids control system. As the professional advanced decanter centrifuge supplier, KOSUN has won high recognition and praise from domestic and abroad with science core technique and a lot of innovative patents. At present, KOSUN's business scope mainly covers China mainland, Commonwealth of Independent States, North Africa, Australia, U.S.A., etc.