• PowerBlade

    NOV PowerBlade is an innovative technology suitable for drilling and hoisting systems.


    Description

    Kinetic Energy Recovery Systems (KERS) are a proven technology widely used in Formula One racing vehicles and NASA exploration spacecraft, recovering a moving vehicle’s kinetic energy while braking, storing it in a reservoir (flywheel) for later use under acceleration.

    On most drilling rigs, the load on the hook is raised and lowered by the drawworks. During active heave compensation, tripping, and all block movement, the AC drawworks motors generate electricity when slowing and stopping the load. The “excess” energy is dissipated in braking resistors as heat.

    The NOV PowerBlade is a KERS system that preserves that lost energy to cut fuel costs and cut emissions while increasing operational safety and reliability.

    During operation, the PowerBlade system captures regenerated electrical energy when the drawworks, crane or winch slows and stops the load on the hook. The PowerBlade stores this as kinetic energy using a flywheel that accelerates and gathers speed, capturing energy from vessel rising and block lowering during active heave compensation. This energy is then recycled and utilized to put power back onto the power grid when needed. The spinning flywheel is housed inside a PowerBlade unit and rotates between 1,000 and 2,000 RPMs, charging and discharging energy in a safe fashion.

    powerblade-test-results

    Features/Benefits

    Features

    • PowerBlade is easily integrated into the power grid and recaptured energy can be distributed as both DC and AC power
    • Modular design allows flexibility to adapt to varying rig equipment capacities and vessel configurations
    • Seamless interface with rig generator control, power management system, equipment controls and the driller operation system

    Benefits

    • Preserve energy to reduce operating costs by lowering peak power demand and leveling load
    • Reduce generator/engine maintenance cost as a result of less consumption demand
    • Provide full power supply if one main generator fails and a full power backup in case of ship black out
    • Recover up to 65%-70% system energy from vessel rising and block lowering in active heave compensation

    Testing

    • Three-step testing process: computer simulation, lab environment setup testing and full scale prototype testing
    • Computer simulation and testing of power scenarios including: active heave compensation mode, constant tension mode, power boost at tripping, and operation in the case of ship black out
    • Full scale testing employs (2) 50-ton multilayer winches, flywheel modules, drives and control & measurement equipment (refer to the above curve for results)