Gallery: Heerema's Thialf Removes Sable Offshore Platforms (Canada)

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December 23, 2020
Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Credit: Heerema Marine Contractors

Heerema Marine Contractors' giant semi-submersible crane vessel Thialf has recently completed the eight-month long campaign to remove the Sable Project’s offshore platforms for ExxonMobil in Canada.

The vessel Thialf arrived in Canada in early April and mobilized to the Sable Field on May 1 to begin executing a sequence of separate lifts of platform components using a reverse-installation method, Heerema Marine Contractors said Wednesday, sharing the photos of the project.

The campaign entailed the Engineering, Preparation, Removal, and Disposal (EPRD) of seven platform topsides, seven jackets and 22 conductors. A total of five barge loads carrying Sable platform components, weighing approximately 48,000 metric tons, were towed across the Atlantic by the Heerema tugs Kolga and Bylgia.

Components were typically transported from the Sable Field to Chedabucto Bay to be prepared (sea-fastened) before their transatlantic voyage. After dismantling at the ABLE UK decommissioning yard in Hartlepool, England approximately 99 percent of the material will be recycled primarily into steel.

"Following a project delay due to the global pandemic in early 2020, an onboard crew of approximately 300 international and domestic workers, aided by support vessels and helicopters, completed the work. The removals campaign involved multiple crew changes and was completed safely and without a single case of COVID-19," Heerema said.

The Sable Offshore Energy Project was developed in the late 1990s, and produced more than two trillion cubic feet of natural gas and liquids before production finished on December 31, 2018.

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