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  2. Submersible drilling rig - Wikipedia

    en.wikipedia.org/wiki/Submersible_drilling_rig

    Blue Water Rig No. 1. The first offshore mobile drilling platform was the Hayward-Barnsdall Breton Rig 20, first operated in 1949. [2] This rig had evolved from the inland drilling barges which were used to drill in marshes and protected waters in up to 10 feet of water. The Breton Rig 20 was 160 feet by 85 feet, and could work in 20 feet water ...

  3. Semi-submersible platform - Wikipedia

    en.wikipedia.org/wiki/Semi-submersible_platform

    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.

  4. SSCV Sleipnir - Wikipedia

    en.wikipedia.org/wiki/SSCV_Sleipnir

    SSCV Sleipnir is a semi-submersible crane vessel (SSCV) owned and operated by the Netherlands-based Heerema Marine Contractors. It was ordered in 2015 and built in Singapore by Sembcorp Marine . It was named for Sleipnir , the eight-legged horse ridden by Odin in Norse mythology .

  5. Transocean John Shaw - Wikipedia

    en.wikipedia.org/wiki/Transocean_John_Shaw

    Transocean John Shaw was a semi-submersible drilling rig designed by Friede & Goldman as a self-propelled modified & enhanced pacesetter, built and delivered in 1982 by Mitsui Engineering & Shipbuilding Ltd. in Japan. The Panama-convenience flagged vessel was designed and outfitted to operate in harsh environments.

  6. Offshore concrete structure - Wikipedia

    en.wikipedia.org/wiki/Offshore_concrete_structure

    Semi-Submersible platforms have pontoons and columns, typically two parallel spaced apart pontoons with buoyant columns upstanding from those pontoons to support a deck. Some of the semi-submersible vessels only have a single caisson, or column, usually denoted as a buoy while others utilize three or more columns extended upwardly from buoyant ...

  7. Ocean Ranger - Wikipedia

    en.wikipedia.org/wiki/Ocean_Ranger

    Ocean Ranger was a semi-submersible mobile offshore drilling unit that sank in Canadian waters on 15 February 1982. It was drilling an exploration well on the Grand Banks of Newfoundland, 267 kilometres (166 mi) east of St. John's, Newfoundland, for Mobil Oil of Canada, Ltd. (MOCAN) with 84 crew members on board when it sank.

  8. Scarabeo 8 - Wikipedia

    en.wikipedia.org/wiki/Scarabeo_8

    Scarabeo 8 is an ultra deepwater 6th generation semi-submersible drilling rigs. It is designed by Moss Maritime and its design type is CS50 MKII. [2] The rig is able to operate at the water depth up to 10,000 feet (3,000 m), which is classified by the oil industry as "ultra-deepwater", and its drilling depth is 10,660 metres (34,970 ft). [2]

  9. Transocean Marianas - Wikipedia

    en.wikipedia.org/wiki/Transocean_Marianas

    Transocean Marianas was an Earl & Wright Sedco 700 design semi-submersible platform drilling unit capable of operating in harsh environments and water depths up to 7,000 feet (2,100 m) using a 47.6 cm (18.75 in), 15,000 psi blowout preventer (BOP), and a 53 cm (21 in) outside diameter (OD) marine riser.

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