Project

Change out of CALM buoys at Berths 4 and 5 of Waha Oil Company offloading Terminal at Ras Es Sider - Libya

Client

Monobuoy

Main Client

Waha Oil Company

Rana Scope of Work

Old buoys removal:

  • Floating hose removal
  • Subsea hose disconnection and laydown on seabed
  • Mooring chain disconnection

New buoys connection:

  • Chain length sections change out
  • Chains legs hook-up
  • Chain tensioning
  • Excess mooring chain cutting
  • Subsea hose connection
  • Buoyancy tanks dewatering and configuration
  • Floating hoses installation
  • Flushing and leak test
  • Mooring hawsers installation
  • As left survey
  • Commissioning and handover of the installed CALM buoy to Client

 

Project Data

Location

Mediterranean Sea – Ras Es Sider terminal offshore Libya

Dates

29/08/2017 to 23/10/2017

Diving technique

Surface-supplied air diving

Duration

66 days

Resources

Vessels

  • MPSV Ievoli Ivory
  • AHV Asso Ventotto
  • Sarah barge
  • Tug boats

Diving Systems

  • Air Diving System

Personnel

Diving team: 27

Main equipment

  • Lifting and installation
  • Hydraulic tools
  • HP water jetting
  • Subsea welding/cutting