The KOSUN SP Series stainless steel mixing pump provides instant hydration of polymers and bentonite. Discover how its axial turbine and pressure chamber eliminate “fish eyes” and reduce drilling fluid costs.
In modern drilling, whether onshore or offshore, drilling fluid quality determines everything. Its stability directly affects penetration rate, wellbore integrity, and overall project safety. However, preparing ideal fluid is not simply mixing powders with water. It is a complex process requiring powerful mechanical energy. This is where the KOSUN SP Series mixing pump excels.
Why a Conventional Pump Is Not Enough
Standard centrifugal pumps are designed for transfer, not mixing. When powdered polymers or bentonite are added to conventional flow, they form dense gel lumps,”fish eyes.” These lumps clog shakers, settle in tanks, and increase additive consumption. Solving this requires a fundamentally different approach.
Innovative Hydrodynamics: Turbine and Pressure Chamber
KOSUN engineers developed a design combining an axial-flow turbine pump with a horn-shaped pressure chamber.
How does it work? Fluid is accelerated by the turbine impeller to high velocity, then directed through nozzles toward an impact plate. At impact, intense mixing forces break molecular bonds, allowing polymers to fully hydrate. The result: complete elimination of “fish eyes” and perfect homogenization.
Materials That Ensure Long Service Life
Drilling fluid is aggressive, abrasive particles and chemicals quickly damage cast iron. For this reason, KOSUN uses precision-cast stainless steel for all wetted parts. Stainless steel provides corrosion resistance and strength to withstand continuous wear. The benefits: extended service intervals and reduced downtime.
Reliable Operation Under Any Conditions: Low NPSH
One main threat is cavitation, caused by insufficient suction pressure. Cavitation damages impellers and seals, leading to premature failure. The SP Series is optimized for low NPSH , maintaining stable operation even where conventional pumps fail.
Global Field Experience and Fast ROI
The KOSUN SP Series has proven itself worldwide, from Middle Eastern deserts to Russian winters and Southeast Asian humidity. A 75 kW configuration delivers 120–150 m³/h , ideal for large-scale systems. Improved chemical utilization and faster hydration reduce cost per cubic meter. Investment typically pays back within months through reduced material consumption and shorter mixing times. API compliance and a compact design simplify maintenance, even in remote locations.
Conclusion
The KOSUN SP Series mixing pump is a critical tool for maximizing drilling efficiency and minimizing non-productive time. With innovative hydrodynamics, durable stainless steel construction, and proven global performance, it delivers reliable, cost-effective mixing for the most demanding operations.