Thialf (ship)
 Thialf in a Norwegian fjord
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The Thialf was the most powerful floating crane in the world until the Sleipnir was commissioned in May 2019 . It is mainly used as a work ship for the construction of offshore structures . The ship belongs to the Dutch company Heerema Marine Contractors (HMC). The ship is also known as SSCV Thialf or DCV Thialf ; SSCV stands for S emi- S ubmersible C rane V essel ( German “semi-diving crane ship” ) and DCV for D eepwater C onstruction V essel ( German “deep sea construction ship” ). The name Thialf is derived from " Thialfi ", the servant of the Germanic thunder god Thor .
history
The Thialf was built in 1985 for McDermott by Mitsui Engineering & Shipbuilding , a company of the Japanese Mitsui Group . The keel was laid on April 12, 1985 and the ship was delivered on December 1, 1985. The ship sailed until November 22, 1996 as McDermott Derrick Barge No. 102 and then until March 6, 1998 as DB-102 ( D errick B arge 102).
Today the ship is officially operated by Thialf Shipping Inc., a company registered in the Netherlands Antilles , and sails under the flag of Panama .
Structure and performance
The ship is designed as a semi-submersible and can vary its draft between 11.8 and 31.6 meters (m). The hull of the Thialf consists of two floating bodies that support the deck structure via four pillars each.
Crane systems
The two cranes each have an approved capacity of 7,100 tons (t), which results in a total double-lift capacity of 14,200 tons with a radius of up to 31.2 m. The cranes were tested with a load of 7,810 t each. The Thialf thus achieves a maximum load torque of over 443,000 meter tonnes .
The Thialf set a world record for the highest load ever lifted with a floating crane in 2000 when the 11,800 t deck of the Shell Shearwater platform was installed. The record was surpassed in 2004 by the Saipem 7000 , which lifted a deck of the Sabratha drilling platform in the Mediterranean with a weight of 12,100 t. This record was exceeded in 2019 by the Sleipnir with the installation of the Leviathan platform in Israel and a load of 15,300 t.
Dynamic positioning, drive and anchor system
Using a class III dynamic positioning system , the Thialf can hold its position even under adverse environmental conditions. Two ADP 503 and ADP 311 systems manufactured by Kongsberg are used for this. It is positioned with six retractable propeller pods, each with an output of 5500 kilowatts (kW). The twelve 22.5 t “Flipper Delta” anchors , which are attached to 2400 m long and 80 millimeter thick anchor ropes, can be used to anchor the ship .
Others
The Thialf offers the possibility of accommodating up to 736 people who live in heated and air-conditioned cabins. The landing deck for helicopters is suitable up to the size of a Boeing CH-47 Chinook .
Well-known projects
- During the construction of the Erasmus Bridge in Rotterdam over the Nieuwe Maas, Thialf installed the almost 140 m high pylon.
- The dismantling of the floating oil tank Brent Spar , which was originally intended to be sunk, but then attracted worldwide attention due to the media-effective occupation by Greenpeace , was carried out in 1998 with the help of Thialf , among others .
- The second heaviest ever by the Thialf load lifted was a 10,470-tonne segment of an oil rig, when the block 14 Compliant Piled Tower (BBLT field) (CPT) in the "Benguela, Belize, Lobito and tomboco" field off the coast of Angola built has been.
- In September 2009, the Thialf anchored 40 nautical miles north of the island of Borkum foundations for the offshore wind farm " alpha ventus " in the bottom of the North Sea.
Technical specifications
- Load capacity of the deck: 15 t per m 2
- Total load capacity: 12,000 t
- Ballast pump capacity: 20,800 m 3 per hour
- Cruising speed: 6 knots with a payload of 12,000 t on deck and a draft of 12.5 m
See also
- Drilling platform
- Overview of the most powerful floating cranes
- List of the largest ships in the world
Web links
- Thialf on the Heerema Marine Contractors website
- Establishing the BBLT platform with support from the Thialf from offshore Technology (Engl.)
- 3Sat media library with the report “Tomorrow's electricity network” from the “hitec” series, installation of a substation for the Alfa Ventus wind farm with the help of Thialf.
Individual evidence
- ↑ ABS Eagle Vessel Record Thialf. eagle.org, accessed March 1, 2016 .
- ↑ Data, current position and pictures of the Thialf on Digital Seas (accessed on May 20, 2010)
- ^ Semi-submersible floating platform vessel Thialf. 4coffshore.com, accessed March 1, 2016 .
- ↑ a b Data on Thialf on ABS Record (accessed October 6, 2012)
- ↑ Data on the owner of the Thialf on ABS Record (accessed October 10, 2012)
- ↑ Data on the cranes on ABS Record (accessed on March 10, 2009)
- ↑ a b HMC website with information on the records (English, accessed on March 17, 2009) ( Memento of the original from November 19, 2008 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ HMC press release on the project (accessed on March 17, 2009) ( Memento of the original from April 20, 2009 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Information on installing the Sabratha on Lloyds Register (accessed March 20, 2009)
- ↑ World record: Heerema's crane vessel Sleipnir lifts 15,300 tons. Heerema, September 8, 2019, accessed March 31, 2020 .
- ↑ Offshore Technology with information on the BBLT platform project (accessed on March 12, 2009)
- ↑ Giant "Thialf" helps with the construction , Daily Port Report No. 175, September 10, 2009, p. 3
