Heerema’s semisubmersible crane vessel Sleipnir has installed the platform at the Premier Oil-operated Tolmount gas field development in the UK southern North Sea.
(Courtesy Heerema Marine Contractors)
During the Tolmount platform installation, the Sleipnir ran on LNG.
The project consisted of installing the 2,350-metric ton (2,590-ton) jacket and 2,500-metric ton (2,756-ton) topsides constructed by Rosetti Marino.
The Tolmount field is 40 km (25 mi) off the coast of Hull, UK, in a water depth of about 51 m (167 ft).
The jacket and topsides arrived at the Tolmount field following a 5,390-km (3,349-mi) journey from Rosetti's yard in Ravenna, Italy.
(Courtesy Heerema Marine Contractors)
The Sleipnir installing the 2,500-metric ton (2,756-ton) topsides.
The Sleipnir traveled to the Tolmount field on Oct. 7. Installation began on Oct. 12 when the jacket was lifted from the Heerema barge H-408. After finalizing jacket and pile installation, the Sleipnir lifted and installed the topsides on Oct. 13, over five hours, to complete the Tolmount platform project.
(Courtesy Heerema Marine Contractors)
The Tolmount platform will be a normally unattended installation.
Rosetti managed the construction and installation of the low-carbon design jacket and topsides on behalf of Premier Oil. The project involved more than 1,100,000 manhours, was executed LTI free, and was completed in 26 months.
Tolmount is on track to deliver first gas in 2Q 2021.
