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The Fleet  Our Rigs Discoverer Clear Leader
Fleet Specifications
| 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 |
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| 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 |
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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 |
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| Desilter |
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| 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 |
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Podline
Tensioners |
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| 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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