Discoverer Clear Leader The DISCOVERER CLEAR LEADER is a double hull dynamically positioned Enhanced Enterprise class drillship capable of operating in moderate environments and water depths up to 12,000 feet (3,657m) using 18¾in 15000 psi BOP and 21in OD marine riser. Rig Type 6th Generation Deepwater Design Transocean Offshore Enhanced Enterprise class, double hull, dual drilling activity. Builder Daewoo Shipbuilding & Marine Engineering, Okpo, South Korea Year Built 2009 Classification DNV Drill Class 1A1, ship-shaped drilling unit, EO DYNPOS, AUTR, DRIL, HELDK, CRANE, TEMPSTORE Flag Marshall Islands Accommodation 200 berths Helideck Sized for Chinook 234 helocopter. Moonpool 72 1/2 ft. x 30 ft Station Keeping Dynamically Positioned Max Drill Depth 40,000 ft / 12,191 m Max Water Depth 12,000 ft / 3,657 m Operating Conditions Wind 60 knots, Wave 30 ft Storm Conditions Wind 100 knots, Wave 50 ft Technical Dimensions Length 835 ft 255 m Breadth 125 ft 38 m Depth 62 ft 19 m Operating Draft 42 ft 13 m Ocean Transit Draft 0 ft 0 m VDL - Operating 22,046 st 20,000 mt Capacities Liquid Mud 20,000 bbls 86,463 cu ft 2,447 cu m Drill Water 13,700 bbls 112,292 cu ft 3,179 cu m Potable Water 5,000 bbls 28,072 cu ft 794 cu m Fuel Oil 36,000 bbls 202,125 cu ft 5,723 cu m Bulk Mud 16,000 cu ft 453 cu m Bulk Cement 16,000 cu ft 453 cu m Sack Material 16,000 sacks of 50 lbs Drilling Equipment Derrick 226 ft x 80 ft x 80 ft base with 20 ft x 60 ft top dual-activity derrick Drawworks 2 x NOV active heave compensating, rated 1,000 ST with 2-inch line Motion Compensator 2 x NOV active heave compensating, rated 1,000 ST with 2-inch line Top Drive 2 x Maritime Hydraulics MDDM 1,250 ST with 2 each AC variable frequency driver motors Rotary 1 x NOV 75 1/2 inch hyrdraulic forward, 1 x NOV 60 1/2 inch aft Pipe Handling 2 Varco PRS-5 pipe racking systems, 1 PLS Mud Pumps 5 NOV Hex 240 pumps 7,500 psi, each powered by 2 AC electric motors Shale Shakers 10 x Brandt LCM-3D/CM-2 linear motion cascade shakers Desander Desilter Mud Cleaner 1 x Vortext Venture Model VV-VMH-468 with 3 x 4 inch hydrocyclones each BOP 3 x Hydril 18¾ inch 15K compact double ram preventer; Vetco 18 3/4 inch 15K Super HD wellhead connector LMRP 1 x Hydril 18¾in 10K Annuflex annular preventer; 1 x Vetco 18 3/4 inch 15K HAR H4 riser connector Diverter Vetco CSO 72 inch bore, 500 psi Control System Hydril multiplex control system. Riser 134 x Vetco HMF 21 inch OD, 75ft joints with Class G couplings and 2 x 4 1/2 inch ID 15k CK lines Riser Tensioners 6 x Hydralift 400 ST direct acting cylinders with 50 ft stroke or equivalent Guideline Tensioners Podline Tensioners Choke & Kill 3 1/16 inch x 15K C&K Manifold H2S Service Cementing Third Party Equipment Machinery Main Power 6 x MAN B&W V32/40 14 cylinder engines rated 7,000 kW each, driving 6 x LDW-Siemens S5E 1250-10SE+wk generators rated 6,456 kW Emergency Power 1 x MAN B&W 7L27/38 engine rated 2,310 kW driving 1 x Hyundai 2,100 kW 480V generator Power Distribution Siemens 11 kV switchboard feeding Siemens Blue variable speed drive, PWM type Deck Cranes 4 x 100 MT electro-hydraulic knuckle-boom cranes, lift radius 7.8m to 45m Thrusters Used for propulsion; 6x Rolls Royce Aquamaster 7,000 HP fully azimuthing Propulsion 6 x Siemens Siplink Thruster Drives driving 6 x LDW Siemens 5,500 kW A5L900S54-10KV=VK Thruster Motors Mooring Equipment Winches N/A - DP Vessel Wire/Chain N/A - DP Vessel Anchors N/A - DP Vessel
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