Noble Valiant Turndown Sheaves And Crane Boom Rams

21st February 2024
  • Projects


Noble Drilling approached DSL with a request for a IRATA Rope Access rig-building team to undertake the following tasks onboard the Noble Drillship “Valiant”

• Crown Assembly Removal
• Removal and re-installation of 16 Turndown Sheave
• NOV knuckle Boom Crane Ram change out

Completing the tasks within a specific time slot to meet client drilling programme
Completing complex rigging operations in very congested areas of the asset

Work-scope 1 Crown Removal

  • Create Lift Plans
  • Install certified rigging equipment to undertake the work scope activities
  • De-reeve of Drill Line and Travelling Block Removal
  • Fast Line & Dead Line Removal
  • Crown Block Assembly removal
  • Assist Rig Crew with Sheave Change-out
  • Re-Installation of Crown Cluster Assembly, Fast Line and Deadline
  • Assist Drill Crew with Re-Installation of Travelling Block and Re-Reeve drill line
  • Carry out Derrick DROPS sweep post installation

Work-scope 2 Turn-down Sheaves

  • Create Lift Plans
  • Install Certified Rigging Equipment to undertake the work-scope activities
  • Complete the removal of any clashes adjacent to the Sheave assembly
  • Removal of the turndown Sheave Fixings & Pin  Cross-haul & Lower Sheave to a safe lay down area
  • Remove Bearing Plate, Clean & Inspect Bearings
  • Reinstall Sheave into Sheave Housing
  • Reinstall Sheave Pin into Sheave Bore and Housing Bore by means of Jacking
  • Carry out DROPS sweep post installation

Work-scope 3 KBC Change out

  • Create Lift Plans & Rope Access Method Statements
  • Install certified rigging equipment to undertake the work-scope activities
  • Removal of NOV Knuckle Boom Crane Rams
  • Reinstatement of NOV Knuckle Boom Crane Rams
  • Carry out DROPS sweep post installation
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