Dong Energy has informed that the third deck of the Hejre platform’s topside has been lifted into place.
The topside for the Hejre platform is under construction in South Korea.
Dong Energy says there are lots of details and challenges in connection with the construction of the Hejre platform. The platform’s topside will consist of more than 13,000 tonnes of structural steel, 600km of cables, 40km of pipes, three lifts and more than 100 supplier packages (pumps, compressors, tanks, etc) arriving regularly from all over the world. The company says it is a large and complex task to put all these things together, and it is expected to take more than 1.8 million working hours to produce the platform’s topside.
A milestone at the middle
The company says its subcontractors are working hard on completing the project and they have just reached a major milestone, i.e. the installation of the intermediate deck. This is the third deck out of the topside’s five decks.
Building the decks upside down
The Hejre platform is under construction at DSME’s shipyard in South Korea. The shipyard is building the platform’s deck upside down.
As most of the structural components, cables, pipes and support elements are installed under the ceiling, it is safer and more efficient to install these components while the decks are upside down. Subsequently, the decks are turned over and installed. The building process can be compared to building with LEGO bricks. The only difference being that these ‘LEGO bricks’ weigh several hundred tonnes, the company explains in the release.
A block for the intermediate deck, that weighs 385 tonnes, is turned over so that it can be installed on the platform.
The release further notes that the company has set up a site team to monitor the progress and ensure that the work performed meets DONG Energy’s safety standard.
Watch the time-lapse video showing the construction of the topside from the start and until now where the intermediate deck has been installed. The video covers the construction period from 18 April to 11 October 2014 and lasts approximately 7 minutes.