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The Fleet Our Rigs List by Water Depth Discoverer Clear Leader
Fleet Specifications
Discoverer Clear Leader | The DISCOVERER CLEAR LEADER is a double hulled dynamically positioned drillship (Transocean Offshore enhanced Enterprise-class design), capable of operating in moderate environments and water depths up to 12,000 feet (3,657m) using a 18¾-inch 15000 psi BOP and a 21 in OD marine riser. | Rig Type | 6th Generation Deepwater | | Design | Transocean Offshore enhanced Enterprise-class, double hull, dual drilling activity. | Builder | 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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