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Goodwyn "A" Jacket

Heerema Marine Contractors
Northwest shelf, Australia
Jacket piles
Special Pile Top Drill rig
Goodwyn index.jpg

In 1993 Woodside Offshore Petroleum Pty. Ltd completed construction of the Goodwyn “A” steel jacket offshore platform which is piled to the seafloor in 130 m deep water on the Northwest Shell of Australia.

Due to difficult soil conditions the jacket was primary founded with 2,65 m diameter piles driven to a depth of 116m below the mudline. Followed by 2,0 m diameter insert piles drilled and grouted to a depth of 181m below the mudline.

On request of Heerema a special top dril rig was designed by Wirth and DDC to meet the specified drill rig features. Such as:

  • stroke of 10m to suit 9m dril pipe.
  • top head drive with air, water & discharge swivels
  • 200mT pull capacity
  • reverse circulation principle
  • 300mm internal diameter water course
  • bottom hole assembly diameter 2500mm
  • tilting mast with hoist cylinders fully enclosed in mast legs
goodwyn jacket.jpg