Water Drilling Contracted Year depth depth location or entered capacity capacity standby Rig category and name Type service (in feet) (in feet) status Ultra-deepwater floaters (31) Deepwater Poseidon (a) (b) (c) (d) Drillship 2018 12,000 40,000 U.S. Gulf Deepwater Pontus (a) (b) (c) (d) Drillship 2017 12,000 40,000 U.S. Gulf Deepwater Conqueror (a) (b) (c) (d) Drillship 2016 12,000 40,000 U.S. Gulf Deepwater Proteus (a) (b) (c) (d) Drillship 2016 12,000 40,000 U.S. Gulf Deepwater Thalassa (a) (b) (c) (d) Drillship 2016 12,000 40,000 U.S. Gulf Ocean Rig Apollo (a) (b) Drillship 2015 12,000 40,000 Stacked Ocean Rig Athena (a) (b) Drillship 2014 12,000 40,000 Stacked Deepwater Asgard (a) (b) (d) Drillship 2014 12,000 40,000 Mexico Gulf Deepwater Invictus (a) (b) (d) Drillship 2014 12,000 40,000 Trinidad Ocean Rig Skyros (a) (b) Drillship 2013 12,000 40,000 Angola Ocean Rig Mylos (a) (b) Drillship 2013 12,000 40,000 Stacked Deepwater Champion (a) (b) Drillship 2011 12,000 40,000 Stacked Ocean Rig Corcovado (a) (b) Drillship 2011 10,000 35,000 Idle Ocean Rig Mykonos (a) (b) Drillship 2011 10,000 35,000 Idle Ocean Rig Poseidon (a) (b) Drillship 2011 10,000 35,000 Angola Ocean Rig Olympia (a) (b) Drillship 2011 10,000 35,000 Stacked Discoverer India (a) (b) (e) Drillship 2010 12,000 40,000 Ivory Coast Discoverer Luanda (a) (b) (e) Drillship 2010 7,500 40,000 Stacked Dhirubhai Deepwater KG2 (a) Drillship 2010 12,000 35,000 China Discoverer Inspiration (a) (b) (d) (e) Drillship 2010 12,000 40,000 U.S. Gulf Discoverer Americas (a) (b) (e) Drillship 2009 12,000 40,000 Stacked Development Driller III (a) (b) (f) Semisubmersible 2009 7,500 37,500 Equatorial Guinea Petrobras 10000 (a) (b) Drillship 2009 12,000 37,500 Brazil Discoverer Clear Leader (a) (b) (d) (e) Drillship 2009 12,000 40,000 Idle Dhirubhai Deepwater KG1 (a) Drillship 2009 12,000 35,000 India GSF Development Driller II (a) (b) (f) Semisubmersible 2005 7,500 37,500 Stacked GSF Development Driller I (a) (b) (f) Semisubmersible 2005 7,500 37,500 Australia Discoverer Deep Seas (a) (b) (e) Drillship 2001 10,000 35,000 Stacked Discoverer Spirit (a) (b) (e) Drillship 2000 10,000 35,000 Stacked Deepwater Nautilus (f) Semisubmersible 2000 8,000 30,000 Brunei Discoverer Enterprise (a) (b) (e) Drillship 1999 10,000 35,000 Stacked
Harsh environment floaters (14) Transocean Enabler (a) (f) Semisubmersible 2016 1,640 28,000 Norwegian N. Sea Transocean Encourage (a) (f) Semisubmersible 2016 1,640 28,000 Norwegian N. Sea Transocean Endurance (a) (f) Semisubmersible 2015 1,640 28,000 Norwegian N. Sea Transocean Equinox (a) (f) Semisubmersible 2015 1,640 28,000 Norwegian N. Sea Polar Pioneer (f) Semisubmersible 1985/2014 1,500 25,000 Stacked Songa Dee (f) Semisubmersible 1984/2014 1,500 30,000 Stacked Transocean Spitsbergen (a) (f) (g) Semisubmersible 2010 10,000 30,000 Norwegian N. Sea Transocean Barents (a) (f) (g) Semisubmersible 2009 10,000 30,000 Canada Henry Goodrich (f) Semisubmersible 1985/2007 5,000 30,000 Canada Eirik Raude (a) (h) Semisubmersible 2002 9,800 30,000 Stacked Leiv Eiriksson (a) (f) Semisubmersible 2001 7,500 25,000 Norwegian N. Sea Transocean Leader (f) Semisubmersible 1987/1997 4,500 25,000 U.K. N. Sea Paul B. Loyd, Jr. (f) Semisubmersible 1990 2,000 25,000 U.K. N. Sea Transocean Arctic (f) Semisubmersible 1986 1,650 25,000 Norwegian N. Sea
Midwater floaters (4) Sedco 714 (f) Semisubmersible 1983/1997 1,600 25,000 Stacked Transocean 712 (f) Semisubmersible 1983 1,600 25,000 U.K. N. Sea Actinia (f) Semisubmersible 1982 1,500 25,000 India Sedco 711 (f) Semisubmersible 1982 1,800 25,000 Stacked
(a) Dynamically positioned. (b) Patented dual activity. (c) Designed to accommodate a future upgrade to 20,000 pounds psi blowout preventers. (d) Two blowout preventers. (e) Enterprise-class or Enhanced Enterprise-class rig. (f) Moored. (g) Dual activity. (h) Later in February 2019, we committed to a plan to sell Eirik Raude and related assets.
AR-4