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The Fleet  Our Rigs List by Location Sovereign Explorer
Fleet Specifications
| Sovereign Explorer |
| The SOVEREIGN EXPLORER is an Enhanced GVA 4000 design semi-submersible drilling unit capable of operating in water depths up to 4,500 feet using 18¾in 15,000 psi BOP and 21" OD marine drilling riser. |
| Rig Type |
Other Deepwater |
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| Design |
Enhanced GVA 4000 Self Propelled Semi-Submersible |
| Builder |
Cammell Laird Shipbuilders Ltd., Birkenhead, UK |
| Year Built |
1984 |
| Classification |
DNV +1A-1 HELDK/DFS/DRL/CRANE/EO |
| Flag |
Liberia |
| Accommodation |
100 berths |
| Helideck |
Octagonal 82.7 ft x 82.7 ft, rated for S-61 |
| Moonpool |
20.3 ft x 58.6 ft |
| Station Keeping |
Moored |
| Max Drill Depth |
25,000 ft / 7,620 m |
| Max Water Depth |
4,500 ft / 1,372 m |
| Operating Conditions |
Wave: 50 ft @ 9 sec; Wind: 65 knots; Current: 1.5 knots |
| Storm Conditions |
Wave: 115 ft @ 16 sec; Wind: 100 knots; Current: 2 knots |
Technical Dimensions
| Length |
301 ft |
92 m |
| Breadth |
256 ft |
78 m |
| Depth |
135 ft |
41 m |
| Operating Draft |
80 ft |
24 m |
| Ocean Transit Draft |
36 ft |
11 m |
| VDL - Operating |
3,875 st |
3,516 mt |
Capacities
| Liquid Mud |
3,142 bbls |
17,641 cu ft |
499 cu m |
| Drill Water |
12,302 bbls |
69,070 cu ft |
1,955 cu m |
| Potable Water |
2,472 bbls |
13,879 cu ft |
393 cu m |
| Fuel Oil |
12,315 bbls |
69,143 cu ft |
1,957 cu m |
| Bulk Mud |
|
16,431 cu ft |
465 cu m |
| Bulk Cement |
|
7,561 cu ft |
214 cu m |
| Sack Material |
7,500 sacks |
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Drilling Equipment
| Derrick |
Branham 190 ft x 40 ft x 40 ft, 1400 kips GNC, 1000 kips static hook load |
| Drawworks |
National 1625 DE, 3000 hp input with Baylor 7838 auxiliary brake |
| Motion Compensator |
Rucker Shaffer 25/600, 25 ft stroke, 600 kips operating, 1000 kips locked |
| Top Drive |
Varco TDS-4, 650 st, 1000 hp |
| Rotary |
Nationall C495, 49½in opening, independent drive |
| Pipe Handling |
Maritime Hydraulics UPHS - Synchro system |
| Mud Pumps |
3 x National 12-P-160, 1600 hp each |
| Shale Shakers |
3 x Derrick MF6 shale shakers |
| Desander |
N/A |
| Desilter |
N/A |
| Mud Cleaner |
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| BOP |
2 x Cameron Type T 18¾in 15K double; 1 x Vetco H4HD 18¾in 15K connector |
| LMRP |
1 x Oil States 18¾in Flex Joint; 1 x Shaffer 18¾in 5K annular; 1 x Shaffer NL 18-3/4in 10K annular; 1 x Cameron HC 18 ¾in 10K connector |
| Diverter |
Hughes Regan KFDS, 24in bore, 500 psi |
| Control System |
Cameron Multiplex Control System |
| Riser |
Vetco MR-6D and Vetco MR-6E, 21in OD, 50 ft long |
Riser
Tensioners |
Rucker twin: 12 x 80 kips + 4 x 120 kips |
Guideline
Tensioners |
4 x Rucker 16 kips, 40 ft line travel |
Podline
Tensioners |
N/A |
| Choke & Kill |
CIW 15K H2S Trim manifold with 2 x 3-1/16in hydraulic choke & 1 x 3-1/16in manual choke |
| Cementing |
Dowell Schlumberger MD1000 15K (third party) |
Machinery
| Main Power |
4 x Wartsila 12-V-25 diesel engines rated 3698 hp each, driving 4 x 2640 kW ABB AC generators |
| Emergency Power |
1 x Cummins KT-2300 diesel engine rated 650 hp, driving 1 x 650 kW ABB Stromberg generator |
| Power Distribution |
Hill Graham SCR system, 7 units, 1200 amps, 720 V output |
| Deck Cranes |
2 x Wolffkran HDK 1100HM electro-hydraulic cranes, 131 ft boom, 55 mt @ 66 ft |
| Thrusters |
2 x 2400 kVA Kamewa azimuthing thrusters |
| Propulsion |
See Thrusters |
Mooring Equipment
| Winches |
8 x Hepburn, 615 mt hold, 227 mt stall |
| Wire/Chain |
8 x 4,500 ft x 3in ORQ chains; 8 x 6,500 ft x 3½in wire |
| Anchors |
8 x 12 mt Stevpris Mark V anchors |
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