• Big Bag Unit

    NOV’s Big Bag Slitting Unit is specifically designed for emptying various types of big bags of mud-additive chemicals into the drilling fluid.

     

    Description

    NOV’s Big Bag Slitting Unit is specifically designed for emptying various types of big bags of mud-additive chemicals into the drilling fluid. The simplicity of the unit has been proven to give problem-free operation for those materials handled in Big Bags, whether emptying the bag or feeding the content at the desired rate into the drilling fluid.

     

    Features/Benefits

    Meets all relevant offshore requirements regarding health, safety and environment
    Integrated anti-dust system connected to external dust extraction system
    Hopper shaker system ensures maximum emptying of Big Bag and hopper
    Compact design
    Integrated metering screw conveyor

    Certified for operation in hazardous areas
    Built with materials and surface protections to withstand the roughest offshore environments

    Options:
    Load cells for weight and level monitoring
    System for handling both single-trip and multi-trip Big Bags
    Removable and interchangeable discharge hoppers with shut-off valve

    Specifications

     

    Design Temperature-10°C - +50°C (14°F - 122°F)
    Maximum Bag Weight2000 kg (4400 lbs)
    Slitting Hopper Capacity0.5 m³/h (17.6 ft³)
    Feedrate0 - 5 m³/h (0 - 176 ft³/h)
    Rec. Dust Extraction Capacity180 m³/h (106 ft³/m)
    Metering Screw Motor3.6 kW (4.8 hp)
    Air Driven Vibrator Motor18 Sm³/h @ 6 - 10 barg (660 ft³/h @ 87 - 145 PSI)
    Weightless Metering Screw (dry)600 kg (1320 lbs)
    Please note that the contents of this data sheet may be changed without warning. Drawings and measurements must not be used for construction. 

     

    Other

    Operation:
    The entire operation is controlled from a local control panel or optionally from a central control room.
    1. Big Bags are lifted onto the unit by forklift truck or overhead crane.
    2. As the bag is lowered down onto the slitting hopper, slitting of the bag is executed by an integrated knife system in the slitting hopper bottom.
    3. The knife cuts the bag to a special pattern to secure problem-free, complete, emptying of the bag.
    4. The double flexible membrane at the top of the slitting hopper creates a seal as the bag is lowered down onto the hopper.
    5. The vacuum outlet connection between the double membranes extracts any dust escaping fro the hopper beneath.
    6. The slitting hopper is suported on rubber mount assemblies. A vibrator shakes the hopper to assist in the emptying into the metering screw conveyor.