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The Fleet  Our Rigs List by Name C.E. Thornton
Fleet Specifications
| C.E. Thornton |
| The C. E. THORNTON is a Marathon LeTourneau Class 53-SC cantilever Jackup with skid-off capability and capable of operating in water depths up to 300 ft. A 13-5/8in 10,000 psi BOP is used to obtain maximum drilling depths up to 25,000 ft. |
| Rig Type |
Non-U.S. Jackups |
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| Design |
Marathon LeTourneau Class 53-SC |
| Builder |
Marathon LeTourneau, Vicksburg, Mississippi |
| Year Built |
1974; Upgraded in 1984 |
| Classification |
ABS +A1 Self Elevating Drilling Unit |
| Flag |
Marshall Islands |
| Accommodation |
88 berths |
| Helideck |
71 ft diameter, rated for S-61 helicopter |
| Max Drill Depth |
25,000 ft / 7,620 m |
| Max Water Depth |
300 ft / 91 m |
| Operating Conditions |
Wave: 35 ft @ 14 sec; Wind: 100 knots; Surface Current: 2 knots |
| Storm Conditions |
Wave: 30 ft @ 12 sec; Wind: 50 knots, Surface Current: 2 knots |
Technical Dimensions
| Length |
231 ft |
70 m |
| Breadth |
200 ft |
61 m |
| Depth |
26 ft |
8 m |
| Ocean Transit Draft |
17 ft |
5 m |
| VDL - Operating |
2,605 st |
2,364 mt |
Capacities
| Liquid Mud |
1,411 bbls |
7,922 cu ft |
224 cu m |
| Drill Water |
11,054 bbls |
62,063 cu ft |
1,756 cu m |
| Potable Water |
1,640 bbls |
9,208 cu ft |
261 cu m |
| Fuel Oil |
2,640 bbls |
14,822 cu ft |
419 cu m |
| Bulk Mud |
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4,160 cu ft |
118 cu m |
| Bulk Cement |
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3,120 cu ft |
88 cu m |
| Sack Material |
2,820 sacks |
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Drilling Equipment
| Derrick |
Lee C. Moore 147 ft x 30 ft x 30 ft T-Leg derrick; 1300 kips GNC |
| Drawworks |
Oilwell E-3000, 2000 hp input; Elmagco 7838 electric brake |
| Top Drive |
Varco TDS-3, 1000 hp shunt |
| Rotary |
Oilwell A-375, 37½in opening, independent drive |
| Pipe Handling |
Manual |
| Mud Pumps |
2 x Oilwell A-1700 PT, 1600 hp each |
| Shale Shakers |
4 x Thule VSM-100; 1 x Brandt Dual Tandem Shaker |
| Desander |
1 x Derrick with 2 x 10in cones, 1000 gpm |
| Desilter |
1 x Derrick with 20 x 4in cones, 1000 gpm |
| Mud Cleaner |
1 x Derrick HiG Dryer |
| BOP |
1 x 13-5/8in Hydril GL 5K annular; 1 x 13-5/8in Cameron U 10K single; 1 x 13-5/8in Cameron U 10K double |
| Diverter |
1 x 20in Hydril MSP 2K 21¼in bore BOP diverter system with two Demco 12 x 12 Series V ball valves and Shaffer Model 9 x 7 hydraulic actuator |
| Control System |
Stewart Stevenson Model SSD280-3S11-X, 3000 psi |
| Choke & Kill |
1 x 4-1/16in 10K choke manifold with 1 x 3-1/16in 10K positive choke, 1 x 3-1/16in 10K manual choke and 1 x 2-9/16in 10K Swaco superchoke |
| Cementing |
BJ Cementing Unit (third party) |
Machinery
| Main Power |
5 x Caterpillar D-399 diesel engines, 6375 hp total, two sets are 480V and three sets 600V |
| Emergency Power |
1 x Caterpillar D-3408, 536 hp engine driving 370 kW 480V Caterpillar AC generator |
| Power Distribution |
Ross Hill 1600 SCR, 3 generator controls, 4 x 1800amps SCR bridges |
| Deck Cranes |
3 x MLT RD120 electric, 100 ft boom, 45 st @ 25 ft; 1 x Mariner 480H diesel/hydraulic, 85 ft boom, 20 st @ 20 ft |
Jackup Specifications
| Legs |
Square; 3 x 410 ft; Usable below hull 355 ft |
| Leg Spacing |
Longitudinal 123 ft, Transverse 142 ft |
| Spud Cans |
45 ft diameter x 24 ft high. |
| Jacking System |
Marathon LeTourneau electric rack and pinion system, 16 pinions per leg |
| Cantilever/Slot |
Cantilever |
Mooring Equipment
| Winches |
4 x MLT W-1500TS electric winches |
| Wire/Chain |
4 x 2,000 ft x 1½ in wirerope, EIPS, IWRC |
| Anchors |
4 x 10,000 lbs Baldt Stockless anchors |
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