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Towage and Marine Operations

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  • ombugge
    replied
    Another major towing operation is under way. Ichthys Explorer, the "Central Processing Platform (CPP) for the Ichthys offshore gas field off Northern Territories, Australia has left from the building yard in Geoje, South Koran under tow by 4 AHTS belonging to POSH Terasea in Singapore, who will also be responsible for the installation in the field: http://www.offshoreenergytoday.com/video-ichthys-platform-sets-sail-to-australia/

    OK, I have to admit it, I do miss being part of such large operations once in a while. But then again, I also have to admit that I have become too old for those things.

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  • ombugge
    replied
    Marine Operation: Yes. Offshore: No
    This bridge element was constructed in Germany and transported to Kirkenes, Norway on a Dutch barge standing on two multi-wheeled linked transporters for installation across Bokfjorden in Sor-Varanger. Another example of multi-industrial, multi-discipline and multi-national operation: https://www.youtube.com/watch?v=E0joOQR8z-U

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  • ombugge
    replied
    Pioneering Spirit has done it's biggest lift yet: http://gcaptain.com/giant-pioneering...elta-platform/

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  • ombugge
    replied
    The Offshore Wind market is still booming in Western Europe at least.
    Here is how cables are laid on a Wind Farm in the North Sea: https://gcaptain.com/subsea-cable-in...Captain.com%29

    Leave a comment:


  • ombugge
    replied
    Pioneering Spirit has successfully done the first removal job off Norway: https://gcaptain.com/record-breaking...th-sea-photos/

    Now back to Rotterdam for additional "arms" to be fitted before the big one in the Brent Field, UK waters.

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  • Clipper
    replied
    From various BBC reports dated 8th to 22nd August 2016 ...

    Early Monday 8th August, the 17,000-tonne (deadweight presumably) semi-submersible drilling rig Transocean Winner, under tow from Norway to Turkey, via Malta, to be scrapped, ran aground on the Isle of Lewis, Western Isles Scotland, after towing line between the rig and its tow Alp Forward broke in stormy weather.

    The structure is reported to have been carrying more than 60,000 gallons of fuel, more than 12,000 gallons (56,000 litres) of which were reported on 11 Aug to be lost. On 20 Aug, it was reported that 280 tonnes [why the change of units?] of diesel oil was removed without [further] polution.

    22 Aug - TV news reports an attempt will be made to refloat the rig on this evening's high tide about 22:00. Presumably this attempt will be undertaken by salvage company Smit, which was earlier reported to have been appointed to deal with the incident.

    http://www.bbc.co.uk/news/uk-scotlan...lands-37158461 (follow links for earlier reposts)


    Addendum 1 (information also from BBC):

    22 Aug - Transocean Winner was refloated at 22:04, close to high tide, and is being towed by the two tugs Union Bear and Union Princess around Lewis to Broad Bay on the east side of the island. The journey will cover about 54 miles and could take up to 21 hours to complete.
    Last edited by Clipper; August 23rd, 2016, 10:29.

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  • Oistein
    commented on 's reply
    Sometimes it can be nice to be small

  • ombugge
    replied
    Small scale towing operation in Aalesund:


    Since the exit was closed he disappeared under Stornespiren, to reappear at the ro/ro ramp on the other side.

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  • ombugge
    replied
    Don't know if you have seen this on NatGeo Channel: https://www.youtube.com/watch?v=LQwa...&nohtml5=False
    I was not involved with this project, but I was once Marine Adviser on the LB 200, which laid the main section of the pipe and featured here.

    Leave a comment:


  • ombugge
    replied
    I also found a couple of pictures from the tow of the Argentine Jackup Rio Colorado I from Tierra del Fuego to Puerto Madryn, Argentina, a distance of about 800 n.miles.

    The towing vessel was the South African Salvage Tug WALRAAD WOLTEMADE, one of the world's most powerful tugs at the time: http://www.leithshipyards.com/ships-built-in-leith/1946-to-1984/501-sawolraad-woltemade-yard-no-516-ocean-salvage-tug-safmarine-built-1976.html

    Seen here approaching to make up tow in Baia San Sebastian, Tierra del Fuego on a bleak autumns day
    in 1985:


    On the way we got caught in a storm that was not forecasted (not an unusual occurrence in that area at that time):


    The dedicated forecast was for a force 4 so we decided to cross the mouth of Golfo San Jorge, in stead of following the coastline as originally planned.
    When I called the Duty forecaster to report that we were experiencing a force 10-11 storm, his answer was; No, that is not possible. I shall not quote my reply here.
    Luckily we made it without any serious damages. I was thankful for having only 8 riding crew on the rig and a helicopter following our progress up along the coast, just in case.

    It is not a very nice area to operate rigs, especially not small jackups, or anything else afloat for that matter.

    Leave a comment:


  • ombugge
    replied
    Finally the "Chesapeake Seahorse" loaded with three 52" diam. x 52 m. long piles, also bound for Cabinda, Angola:


    The fwrd. end was held down with this construction:


    While the middle rested on triple steel boxes at the stern:


    The bending was calculated by an engineer in advance, therefore the extra high support at the stern:


    I found the height above still water unacceptable, even for the short trip to Cabinda. The prevailing long swells in the area could result in the ends dipping into water and flooding the pipes, thus causing a lot of extra weight. To alleviate that we got hold of three large Norwegian Buoys from an arrested Tuna Seiner sitting at anchor in Point Noire. These were partly deflated, placed into the end of the pipes and re-inflated.

    I also loaded a small Tripod Jacket onto one of these boat, standing upright and with one leg outside the deck at one side. (Sorry, no picture found)

    PS> The Chesapeake Seahorse length o.a. is 56.40 m. (Lpp: 51.80 m.) Still in existence, but in layup.

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  • ombugge
    replied
    Next up was the "Vigilante Service" loaded with three smaller diam. piles for installation of a Tripod Platform offshore Cabinda, Angola:




    Here is a typical Tripod Jacket on it's way to the field:

    Leave a comment:


  • ombugge
    replied
    Clearing out old stuff I came across some pictures from way back in the 1980s.
    First from loading of long piles on small Supply vessels for BOS Congo in Point Noir in 1984.

    First, the Zapata owned AHTS "Viking Service" loaded with a single large diam., long and heavy pile for transportation to Crane Barge "BOS 355":


    "Gun boat" Viking Service departing Point Noir:




    If I remember right this was for a Mono-pod Platform to be constructed in the Congo River Estuary, in what was then Zaire. (Now DR Congo):

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  • ombugge
    replied
    Here is a video of an anchor handling operation as seen from the wheelhouse on the AHT Balder: https://www.youtube.com/watch?v=OeGiaBK0Cas

    The barge they are handling anchors for is the Castoro 7, ex Agercy Piper, ex LB200, ex Viking Piper. (I was Marine Adviser on this one back in 1981)
    This was one of the lay barges that laid the Langeled pipeline, from Nyhamna on Aukra to the UK: https://en.wikipedia.org/wiki/Langeled_pipeline

    The operation shown here is resetting one anchor. The barge has 12 anchors and use two AHTs to do this operation over and over again 24/7. It moves ahead 80 ft. every few minutes while laying pipe and is held in position only by anchors.
    The pipe has to be kept in tension at all times, otherwise it will buckle, or even break. In bed weather the pipe end is laid down on the seabed for safety.

    Maybe the most tiring job there is for the Master, Officers and Deck crew. It never stops for weeks on end.

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  • ombugge
    replied
    Here is Marine Operation I don't think has been featured here before. Towing and upending a Spar in the GOM: https://gcaptain.com/watch-heidelber...fc43-139840365

    Like all the spars in the GOM this spare was produced in Finland, : http://www.offshoreenergytoday.com/t...l-to-anadarko/

    It was transported from Finland to Corpus Christi, Tx. on the Mighty Servant I: http://www.veristarnews.com/en/may-2...t-607_607.html

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