• DWU-250 Dewatering Unit

    FluidControl offers the BRANDT™ DWU-250 Dewatering Unit, a self contained, portable system that minimizes waste volume from “closed loop” drilling operations, reserve pit closures, and site remediation projects.




    FluidControl offers the BRANDT DWU-250 Dewatering Unit, a self contained, portable system that minimizes waste volume from “closed loop” drilling operations, reserve pit closures, and site remediation projects. As part of the family of proven liquid/solids separation products and services available from NOV, the DWU-250 provides dependable service and simple operation in a variety of applications and locations.

    The DWU-250 is used with one or more Decanting Centrifuges as part of the Chemically Enhanced Dewatering (CED) process to treat from 50 to 350 barrels of fluid per hour. The liquid phase can be less than 1% total suspended solids to relatively solids free, depending on the type of feed fluid and degree of clarity required.


    The Chemically Enhanced Dewatering (CED) process consists of injecting pre-mixed conditioning and/or flocculating chemicals with the feed mud entering a decanting centrifuge. This increases the amount of ultrafine solids that can be separated from the liquid phase of the fluid. The process can be used on weighted and unweighted “closed loop” drilling mud systems. The CED process is also an important part of waste pit closures and other site remediation projects.

    For best results, high performance solids separation equipment should be installed upstream from the DWU-250. After the fluid is processed by these units, it is routed to the DWU-250 and one or more decanting centrifuges. The number of centrifuges used is determined by the processing requirements.


    The DWU-250 has mixing tanks, pumps, piping and connection points, controls, quality check point, and test facilities. All are permanently installed in a weatherized enclosure.

    The mixing and aging tanks are equipped with educators and mechanical agitators for mixing bulk flocculants, coagulants, and other conditioning chemicals. The DWU-250 uses powdered or liquid chemical concentrates. The tanks are calibrated for easy reference when mixing specific volumes or concentrations of chemical solutions. A pre-plumbed water distribution system allows simple and efficient mixing.

    Positive displacement, metering, and injection pumps provide accurate addition of fresh water and chemical solutions from the mixing tanks to the centrifuge. Piping and addition points are acid resistant to reduce corrosion and provide long, dependable service. Connections and operating controls are conveniently located and clearly labeled to simplify installation, operation, and repair. Each unit includes a quality check tank to monitor centrifuge effluent. Online adjustments may be made as the mud is being processed. If preferred, the mud may be batch treated (dewatered) and returned to reserve tankage before being transferred to the active system. The lab area/work bench provides a convenient place to pilot test chemical type and concentration for a specific project. Usually the same chemical solutions are used throughout a job. However, some of the chemical solutions require adjustments due to changes in feed slurry, water source, or other factors.

    All equipment is mounted on a skid or a trailer mounted enclosure with large access doors. The DWU-250 can be supplied with air conditioning, arctic heaters or both, depending on anticipated operating condition. All units are insulated and feature a master control panel, environmental controls, and interior lighting. All components are easily accessible and provide dependable performance in remote locations. A wide variety of custom options include: door and window placement, interior and exterior finishes, lab/test area, and detail and placement are available to meet specific application requirements.




    Weatherized enclosure

    Continuous or batch mixing

    Eductors and mechanical agitators

    Provides water for reuse or disposal

    Pre-plumbed water distribution system

    Recycles dissolved chemicals

    Calibrated tanks

    Improves drilling fluid properties

    Acid resistant piping and addition points

    Reduces drilling fluid cost

    Quality check tank for monitoring

    Reduces disposal volume

    Lab area/workbench

    Produces “paint filter specification” solids

    Skid or trailer mounted

    Improves effluent clarity

    Arctic heaters, AC or both

    Reduces water requirements

    Master control panel

    Allows smaller location

    Wide variety of custom options

    Reduces cleanup cost


    Dimensions (L x W x H)

    20 ft x 8 ft x 8 ft


    12500 lbs (5681 kg)

    Process Rate

    50-350 bbl/hr


    230/460 VAC, 60 Hz or 190/380 VAC, 50 Hz


    Standard, Arctic, Tropical or Custom

    Electrical Requirements

    6.26 HP 84.0 FLa