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The Fleet  Our Rigs List by Rig Type Transocean Leader
Fleet Specifications
| Transocean Leader |
| The TRANSOCEAN LEADER is a Aker H-4.2 self-propelled semi-submersible drilling unit capable of operating in harsh environments and water depths up to 4500 feet using a 18¾in, 15,000 psi BOP and a 21 in OD marine riser. |
| Rig Type |
Other Deepwater |
 |
| Design |
Aker H-4.2 self-propelled semi-submersible |
| Builder |
Hyundai, South Korea |
| Year Built |
1987/1997 |
| Classification |
DnV + 1A1, Column Stabilized Unit, ICE T, HELDK, CRANE, POSMOOR ATA, EO.DRILL (N) |
| Flag |
Bahamas |
| Accommodation |
100 berths |
| Helideck |
27m x 27m; rated for Chinook |
| Moonpool |
|
| Station Keeping |
Moored |
| Max Drill Depth |
25,000 ft / 7,620 m |
| Max Water Depth |
4,500 ft / 1,372 m |
| Operating Conditions |
Significant Wave: 35ft; Wind: 50 knots; Current: 1.5 knot |
| Storm Conditions |
Maximum Wave: 105ft; Wind: 106 knots; Current: 1.4 knots |
Technical Dimensions
| Length |
253 ft |
77 m |
| Breadth |
220 ft |
67 m |
| Depth |
131 ft |
40 m |
| Operating Draft |
77 ft |
23 m |
| Ocean Transit Draft |
25 ft |
8 m |
| VDL - Operating |
5,069 st |
4,600 mt |
Capacities
| Liquid Mud |
13,730 bbls |
77,087 cu ft |
2,182 cu m |
| Drill Water |
6,787 bbls |
38,106 cu ft |
1,078 cu m |
| Potable Water |
4,233 bbls |
23,766 cu ft |
673 cu m |
| Fuel Oil |
15,102 bbls |
84,790 cu ft |
2,400 cu m |
| Bulk Mud |
|
8,228 cu ft |
233 cu m |
| Bulk Cement |
|
8,228 cu ft |
233 cu m |
| Sack Material |
0 sacks |
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Drilling Equipment
| Derrick |
Dreco 52 x 12 x 12m ; 860mt nominal capacity, Continental Emsco C3 w/ 1 5/8in drill line, disc brake, , , , , , , , , , , , |
| Drawworks |
|
| Motion Compensator |
NL Shaffer (crown mounted), 300mt operating (750mt pinned) with MH active heave |
| Top Drive |
Varco TDS-4H, 590mt |
| Rotary |
Continental Emsco with 49½in opening |
| Pipe Handling |
Maritime Hydraulics handling machine |
| Mud Pumps |
3 x Continental Emsco FB-1600 (1,600 hp) |
| Shale Shakers |
5 x Swaco LF3CF Full -Flo |
| Desander |
1 x Swaco 312D w/ (3) 12in cones (1400gpm) |
| Desilter |
1 x Swaco T4 w/ (20) 4in cones (1400gpm) |
| Mud Cleaner |
|
| BOP |
2 x Cameron 18¾in 15,000 psi double rams; Vetco H4HD 15,000 psi wellhead connector |
| LMRP |
Hydril GX 18¾in 10,000 psi annular; Cameron 70 10,000 psi riser connector |
| Diverter |
Hughes Offshore 18¾in 500 psi |
| Control System |
Cameron Multiplex control system for 4,500 ft water depth; 5000 psi |
| Riser |
77 x Cameron 21in OD riser, (35 x 50ft joints; 42 x 60ft joints) w/15,000 psi 3in ID C&K lines |
Riser
Tensioners |
653mt max. tensioning capacity |
Guideline
Tensioners |
4 x NL Shaffer 7.25mt |
Podline
Tensioners |
N/A |
| Choke & Kill |
2 x 3 1/16in Cameron 15,000psi systems with 2 adjustable and 2 power chokes. |
| Cementing |
BJ Hughes, electric driven 15,000 psi unit |
Machinery
| Main Power |
4 x Bergen KVGB-16 diesels (4440 hp) each driving 1 x Siemens 3100 kw AC generator |
| Emergency Power |
1 x MTU diesel driving a 1420 kw emergency generator |
| Power Distribution |
8 x Bauteil C85/2649 SCR units |
| Deck Cranes |
2 x Hagglunds OP-4115/1045, 47m boom, 40mt @ 10m |
| Thrusters |
4 x 3500 hp Niigata Liaaen compass thrusters, fully azimuthing, fixed prop, w/o nozzels. |
| Propulsion |
Thrusters |
Mooring Equipment
| Winches |
4 x double Pusnes anchor windlasses |
| Wire/Chain |
8 x 11,100ft x 3 5/8in wire; 8 x 6561ft x 3 5/16in K4 chain |
| Anchors |
8 x 15mt Bruce MK4 (FFTS) |
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