Heerema Marine Contractors (HMC) is a world leading marine contractor in the offshore oil & gas industry. HMC excels at transporting, installing and removing offshore facilities. This includes fixed and floating structures in shallow waters, deep and ultra-deep waters.

HMC manages the entire supply chain of offshore construction, from design to completion. Headquartered in Leiden, HMC’s services encompass engineering, planning, logistics, project management and execution of projects all over the world. The company owns four of the world’s largest crane vessels: semi-submersible crane vessels (SSCV) Sleipnir, Thialf and Balder, and mono hull crane vessel Aegir. The Aegir is a monohull crane vessel with a large open deck space.

HMC’s new-generation semi-submersible crane vessel Sleipnir is equipped with two cranes of 10,000 metric tonnes lifting capacity each and a reinforced deck area of 220 meters in length and 102 meters in width, which makes it the largest crane vessel in the world.

The dual cranes provide for heavy lifting capacity, both to install and remove jackets and topsides. Furthermore, the cranes can be utilized for installation of foundations, moorings and structures in deep water. The Sleipnir is self-propelled with a minimum service speed of 10 knots, with power generated by dual fuel engines – MGO & LNG. Station-keeping is done by means of dynamic positioning (DP3) or mooring system.

HMC’s crane vessels have large deck areas and unique capacities in the areas of heavy lifting and motion behaviour. This has earned them a reputation for superior workability and excellent station-keeping. Harsh environments and great water depths demand an innovative approach, experience, and, of course, the right equipment. The versatile fleet and sound project management ensure a smooth marine operation.

Text and photo: courtesy of HMC