Troll A Future Development – Pulling equipment

Client: Aibel A/S - Statoil A/S
Location: Troll A Platform, Norwegian Continental Shelf
Project description

Bezemer had been contacted by Aibel who was acting as engineering company for Statoil, to supply a linear winch system suitable to operate on a life platform (Gas producing). Also there were some limits to weights and special rules applicable such as DNV lifting appliances, Norsok Z-015 and ATEX.


Furthermore very strict sound levels had to be met, which is, in combination with low weight and DNV 2.7-1, a challenge. Bezemer has designed and ordered the components as required for this project. The winch was built in 4 sections of each less than 20 tonnes (platform crane limit) which were easy to assemble without hydraulic oil spill. The diesel driven hydraulic power unit, storage winch and winch frame including a deflection sheave, were also designed and built with the same weight limitation and compliant with DNV lifting appliances to safely lift it on board of the platform.


The operation also had some challenges due to the fact that the water depth at location was more than 300 meters and that the vessel equipment had to be suitable to lower and install the pull wire at this water depth. The vessel equipment consisted of a powered storage winch and special build hydraulic power unit, with low exhaust temperature and rig saver mounted.


The pull operation turned out to be the easiest of this whole project, with the pipeline pulled from the lay vessel.

Used products in this project

Continuous linear winch KTC 500

Linear winch type KTC 500


  • Continuous linear winch KTC 500 @ Troll A - drop test HPU frame
  • Continuous linear winch KTC 500 @ Troll A - test setup
  • Continuous linear winch KTC 500 @ Troll A - spooling of wire
  • Continuous linear winch KTC 500 @ Troll A - spooling of wire
  • Continuous linear winch KTC 500 @ Troll A - HPU ready for transport
  • Continuous linear winch KTC 500 @ Troll A - HPU ready for transport
  • Continuous linear winch KTC 500 @ Troll A - Winch ready for transport
  • Continuous linear winch KTC 500 @ Troll A
  • Continuous linear winch KTC 500 @ Troll A
  • Continuous linear winch KTC 500 @ Troll A - overview
  • Continuous linear winch KTC 500 @ Troll A - at location
  • Continuous linear winch KTC 500 @ Troll A - Hagglund on location
  • Continuous linear winch KTC 500 @ Troll A - Hagglund on location

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