Noble Valiant Turndown Sheaves And Crane Boom Rams

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

CHALLENGES

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