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Objects can be lifted and lowered using the main hoist from 20 m (66 ft) below the waterline to 135 m (443 ft) above it when SSCV Sleipnir is operating at its maximum 32 m (105 ft) draft. [7] The main hoists were tested to 110% of rated load using the modified barge H-408 during sea trials in June 2019.
The Saipem 7000 is the world's third largest semi-submersible crane vessel, after the SSCV Sleipnir and the SSCV Thialf. It is owned by the Italian oil and gas industry contractor Saipem S.p.A. History
In 1978, HMC commissioned Mitsui to construct the two sister semi-submersible crane vessels, DCV Balder and SSCV Hermod. These vessels could lift 5,400 tonnes with the twin cranes, and were later upgraded to 8,200 tonnes. [2] In 1988 HMC formed a joint venture with McDermott called HeereMac. [3] "Thialf" in a Norway fjord
The main hoist could lift 92 m (302 ft) above the work deck. The auxiliary hoists could lower to a depth of 3,000 metres (9,800 ft) below the work deck. A tandem lift using the main hoists could lift 9,000 short tons (8,200 t) at a 39 m (128 ft) radius.
These semi-submersible crane vessels (SSCV) consist of two lower hulls (pontoons), three columns on each pontoon and an upper hull. Shortly after J. Ray McDermott and Saipem also introduced SSCVs, resulting in two new enormous vessels DB-102 (now Thialf) and Saipem 7000, capable of lifting respectively 14,200 and 14,000 tons.
SSCV Thialf is a huge semi-submersible crane vessel operated by the Netherlands-based Heerema Marine Contractors; it was the largest crane vessel in the world until the SSCV Sleipnir became the largest in 2019.
The crane's hook is kept level by automatically paying out enough extra cable to compensate for this. This is also a purely mechanical linkage, arranged by the reeving of the hoist cables to the jib over a number of pulleys at the crane's apex above the cab, so that luffing the jib upwards allows more free cable and lowers the hook to compensate.
To protect the hoist(s) and winches and the sensitive electronics which are used to control their operation they are normally installed inside a build called a hoist (or winder) house. Commissioning Sinking Set-Up. The Sinking set-up must then be commissioned to ensure that all parts are operating as planned. Full Sink. The activities of the ...