heerema fabrication

Engineering, Procurement and Construction of Gina Krog Jacket and Pre-drilling Wellhead Module

Heerema Fabrication

Gina Krog Jacket

After successfully having conducted the FEED study of the Gina Krog jacket by Statoil, Heerema Vlissingen finished the construction of the 17,000 tons Gina Krog Jacket.

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At a glance

Engineering, procurement, and construction contract
Jacket weighing 17,000 tons, constructed within 17 months
The jacket was transported to the Gina Krog field, located on the Norwegian Continental Shelf in June 2015

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Equinor & Heerema:

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Feed study & Construction

In 2011 HFG Engineering was awarded the contract for the FEED Study of the Gina Krog (previously Dagny) jacket by Equinor. After the successful FEED study Equinor awarded Heerema Vlissingen the engineering, procurement and construction contract in February 2013 for the Launch jacket and pre-drilling wellhead module.

The FEED design study was performed in two phases. In the first phase a FEED study for a lift jacket has been developed. As the boundary conditions changed, the weight of the jacket became even more critical with regards to lift capacity. Reason for Equinor to decide for a second phase FEED study, being the development of a launch jacket concept. Equinor selected the launch jacket as the concept for the Gina Krog platform.

Heerema Vlissingen constructed the over 17,000 tons jacket within 17 months time and in June 2015 the Launch jacket started its journey for final destination, the Gina Krog field on the Norwegian Continental Shelf.

Key information

Contract type

FEED study
Engineering, Procurement & Construction

Location and Milestones

Location: Gina Krog field, Norwegian Continental Shelf

Project Completion: 2015

Structure and Characteristics

Structure:
Launch Jacket
Pre-drilling wellhead module

Jacket
Size (LxWxH): 60 x 50 x 142 m
Weight: 17,000 tons

Pre-drilling wellhead module
Size (LxWxH): 14 x 14 x 4 m
Weight: 265 tons
Length: 105 m per pile
Weight: 8,100 tons

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