World Fleet of Semi-Submersible Drilling Rigs

(as of August 13, 2008)

Sources: Operators' and Builders' SEC Filings and Web Sites, RigZone.com and others.

Operator Rig Name Design Builder Country Year Built Water Depth (ft.) Drilling Depth (ft.)
Aban Offshore Aban Pearl Aker H-3 enhanced FELS Singapore 1977 1,250 25,000
Aker Drilling A/S Aker Spitzbergen Aker H6e  Aker Stord Norway 2008 10,000 30,000
Atwood Oceanics Atwood Eagle New Era Alabama Shipyard USA 1982 2,000 30,000
Atwood Oceanics Atwood Falcon New Era Alabama Shipyard USA 1983 3,500 30,000
Atwood Oceanics Atwood Hunter New Era Alabama Shipyard USA 1981 3,500 30,000
Atwood Oceanics Atwood Southern Cross New Era Evans-Deakin Australia 1976 2,000 20,000
China Oilfield Services Nanhai II Aker H-3 Aker Oslo Norway 1974 1,000 25,000
China Oilfield Services Nanhai V F&G L-945 Framnaes Norway 1983 1,500 25,000
China Oilfield Services Nanhai VI F&G 9500 enhanced Gotaverken Arendal  Sweden 1982 1,500 25,000
Crosco Integrated Zagreb 1 Pentagone 91 Dunkerque France 1977 1,500 20,000
Delta Offshore Viner I Pentagone Dunkerque France 1974 660 20,000
Diamond Offshore Ocean Alliance Odyssey Class Modified Scott-Lithgow Scotland 1988 5,000 25,000
Diamond Offshore Ocean Ambassador Bethlehem SS-2000 Bethlehem Beaumont USA 1975 1,100 25,000
Diamond Offshore Ocean America Odyssey Class Hyundai  Korea 1988 5,000 30,000
Diamond Offshore Ocean Baroness Victory class Avondale USA 1973 1,200 25,000
Diamond Offshore Ocean Bounty Victory class enhanced Mitsubishi Hiroshima Japan 1977 1,500 25,000
Diamond Offshore Ocean Concord Zapata SS-2000 Avondale USA 1975 2,350 25,000
Diamond Offshore Ocean Confidence Aker H-3.2 Mitsui Tamano Japan 1987 7,500 30,000
Diamond Offshore Ocean Endeavor Victory class Transfield Australia 1975 2,000 25,000
Diamond Offshore Ocean Epoch New Era class Alabama Shipyard USA 1977 1,200 25,000
Diamond Offshore Ocean General New Era class Alabama Shipyard USA 1976 1,500 25,000
Diamond Offshore Ocean Guardian Sedco 700 Scott-Lithgow Scotland 1985 1,500 26,000
Diamond Offshore Ocean Lexington Zapata SS-2000 Avondale USA 1976 2,500 25,000
Diamond Offshore Ocean Monarch Victory class Nylands Norway 1974 3,300 25,000
Diamond Offshore Ocean New Era New Era class Alabama Shipyard USA 1974 1,500 25,000
Diamond Offshore Ocean Nomad Aker H-3 Aker Oslo Norway 1975 1,250 25,000
Diamond Offshore Ocean Patriot Bingo 3000 Dunkerque France 1983 3,000 25,000
Diamond Offshore Ocean Princess Aker H-3 Aker Oslo Norway 1975 1,500 25,000
Diamond Offshore Ocean Quest Victory class Mitsubishi Hiroshima Japan 1973 3,500 25,000
Diamond Offshore Ocean Rover Victory class Avondale USA 1973 2,000 25,000
Diamond Offshore Ocean Saratoga Zapata SS-2000 Avondale USA 1976 2,500 25,000
Diamond Offshore Ocean Star Victory class Avondale