Working Principle and Application of Drilling Fluid DecanterCentrifuges

In oil drilling operations, the efficient operation of the drilling fluid circulation system directly impacts project progress and downhole safety. Within the entire solids control system, the drilling fluid decanter centrifuge serves as a key separation device, responsible for removing fine solid particles and optimizing the properties of the drilling fluid. Leveraging years of industry experience and technical expertise, Xi’an Kosun has continuously innovated in the field of centrifuge separation, offering a series of centrifuges known for high efficiency, low energy consumption, and reliable performance, widely applied across various drilling projects.

The working principle of a drilling fluid centrifuge is based on centrifugal separation technology. When drilling fluid containing solid particles enters the centrifuge bowl, high-speed rotation generates centrifugal force, causing substances with different densities to separate into layers. Heavier solid particles are forced toward the inner wall of the bowl, forming a solid layer, while the lighter liquid forms an inner liquid layer, which is discharged through the overflow port. By adjusting the bowl speed and differential speed, operators can flexibly control the solid-liquid separation precision, effectively removing micron-level fine solids and ensuring the stability and performance of the drilling fluid.


Compared with traditional equipment such as shale shakers, desanders, and desilters, the primary advantage of a centrifuge lies in its ability to handle smaller particles with closer density differences. This capability is crucial for maintaining the viscosity, density, and sand content of drilling fluid within optimal ranges. Particularly in complex formations such as deep wells, horizontal wells, and shale gas wells, centrifuges can effectively prevent drilling fluid degradation, reduce risks such as wellbore collapse and stuck pipe, and thereby significantly enhance drilling efficiency and operational safety.
Xi’an Kosun emphasizes structural optimization and material durability in its centrifuge designs. The equipment features a high-strength stainless steel bowl with excellent corrosion and wear resistance. The drive system is equipped with high-efficiency, energy-saving motors and imported bearings, ensuring stable and reliable operation. An intelligent control system allows real-time monitoring of bowl speed, vibration, and temperature, enabling precise adjustments and automatic protection.

In addition, Xi’an Kosun offers multiple centrifuge models tailored to different operational needs, including high-speed, high-viscosity, and complex fluid applications, suitable for oil and gas drilling, trenchless construction, and environmental sludge treatment. On drilling sites, the application of centrifuges not only optimizes drilling fluid recycling but also reduces resource consumption and operational costs. By continuously removing fine solids, drilling fluid can be reused significantly more times, reducing the need for new fluid preparation and minimizing waste discharge, thereby providing substantial economic and environmental benefits.

With over 30 years of industry experience, Xi’an Kosun has become a leading enterprise in the field of solids control and drilling fluid treatment equipment. The company adheres to the philosophy of “winning the market through technology and building the brand through quality”, continuously innovating in centrifugal separation technology to deliver high-performance, highly reliable drilling fluid centrifuges and integrated solutions. Looking forward, Xi’an Kosun will continue to advance solids control technologies, helping the global oil and gas drilling industry achieve more efficient and environmentally sustainable operations.