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“Ocean Rig Skyros”號...2013-06-20
“Ocean Rig Athena”號“Ocean Rig Poseidon”號...2012-11-08
巴西Synergy Group建造...2012-02-15
合同價6.5億美元...2012-02-08
每艘造價8億美元...2011-11-10
巴西國油Petrobras租賃兩船...2011-05-23
