Heather Alpha topsides removal

Platform decommissioning
Pioneering Spirit
Heather Alpha platform

Engineering, preparation & single-lift removal of the 15,300-tonne Heather Alpha production and drilling topsides from the UK North Sea.

Company: EnQuest

Location: UK North Sea

Water depth: 143 metres

Engineering, preparation, removal and disposal of 14,000-tonne topsides

 

Scope of work

  • Engineering, preparation & removal of the 15,300-tonne Heather Alpha topsides
  • Pre-lift preparation work (incl. underdeck removal of structures)
  • Design, fabrication & installation of under deck lift points
  • Cutting of platform legs
  • Design & fabrication of support stool interfaces & grillage
  • Topsides lift by Pioneering Spirit and transport to dismantling yard
  • Transfer of topsides from Pioneering Spirit to Iron Lady
  • Load-in topsides from Iron Lady to dismantling yard (M.A.R.S, Denmark)
  • Dismantling and disposal of topsides
Oceanic assisting platform preps
Installing custom-made lifting brackets
Welding the brackets to the platform legs
Leg cutting and padeye welding
Completion of platform preps
Moving in around the platform
Connecting the TLS levers to the lifting points
Fast lift of the 15,300-tonne topsides
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