Case studies

Wire rope inspection and spooling services (WRISS)

Innovative wire rope inspection and tensioning techniques provide an efficient solution when deck space and time is tight and you need a safe and controlled spooling method.



Drilling vessel








Our customer required to increase the overall life of the wire ropes that are crucial to their operations and due to the diameter and length, 3 inch x 11,500 ft (76mm x 3,505m), proper means for inspection and tension were limited on-site.

Our specialists were tasked to inspect the wire rope on all four cranes to:

  • Ensure work was completed within an eight day timeframe
  • Establish baseline E-mag inspections of each wire rope (Internal and visual)
  • Reinstall each wire rope under 2%-3% minimum tension as per the wire rope manufacturer recommendations



Solution applied

  • We developed a system that used our 4-track 36 Te tensioner, a sub-frame with lead sheave assembly, a large reel system and a LMA 300 E-mag machine.
  • The large reel used allows collection of up to 13,000 ft (3,962 m) of 3 inch (76 mm) wire rope for the inspection and tensioning which suited the customer’s requirements.
  • We used the E-mag machine to perform a non-destructive inspection of the wire rope which looked for loss of metallic cross-sectional areas (LMA) such as external and internal corrosion, wear, changes to wire rope structure and localised flaws such as broken wires and corrosion pitting.
  • The comprehensive system applied proper back tension to the wire rope during re-installation, allowing our customer to improve their planned maintenance and their specific wire rope inspection and replacement criteria by allowing for on-site inspection.
  • The tensioner allowed us to apply a controlled tension while re-installing the wire rope. The sub-frame and lead sheaves enabled the system to act as support on the vessel decks and provided guidance for the wire rope from a zero degree (horizontal line pull) arrangement to 90 degrees (vertical line pull).



Summary of services/equipment deployed

  • LMA 300 E-mag machine and software
  • 36 Te tensioner
  • Lead sheave assembly & sub-frame for tensioner
  • 120 Ton spool reel system
  • Knuckle boom crane for level winding
  • Generator
  • Supply of inspection personnel




The solution applied by the Sparrows Group provides a number of benefits:

  • Knowledge about the internal and external condition of their ropes through advanced inspection techniques
  • Safe and accurate re-installation of wire rope with proper back tension as per manufacturer requirements
  • Confidence in project execution and delivery with complete on-site services
  • An efficient solution when space and turnaround time is tight





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