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The Fleet  Our Rigs  List by Location  D.R. Stewart

Fleet Specifications

D.R. Stewart
The D.R. STEWART is a 3 leg Marathon LeTourneau 116-C cantilever Jackup 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 
Design Marathon LeTourneau Class C-116 
Builder Marathon LeTourneau Pte Ltd., Singapore 
Year Built 1980 
Classification ABS +A1 Self Elevating Drilling Unit 
Flag Marshall Islands 
Accommodation 86 berths 
Helideck 70 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: 40 ft @ 15 sec; Wind: 70 knots; Current: 2 knots 
Storm Conditions Wave: 40 ft @ 15 sec; Wind: 70 knots; Current: 2 knots 

Technical Dimensions

Length 243 ft  74 m 
Breadth 200 ft  61 m 
Depth 26 ft  8 m 
Ocean Transit Draft 15 ft  5 m 
VDL - Operating 2,477 st  2,248 mt 

Capacities

Liquid Mud 1,467 bbls  8,236 cu ft  233 cu m 
Drill Water 10,878 bbls  61,075 cu ft  1,728 cu m 
Potable Water 1,280 bbls  7,187 cu ft  203 cu m 
Fuel Oil 3,120 bbls  17,517 cu ft  496 cu m 
Bulk Mud   4,050 cu ft  115 cu m 
Bulk Cement   4,050 cu ft  115 cu m 
Sack Material 2,500 sacks     

Drilling Equipment

Derrick Dreco 160 ft x 30 ft x 30 ft; 1,330 kips GNC; 1,000 kips static hook load 
Drawworks Oilwell E-3000 double drum, 2000 HP input with Elmagco 7838 auxiliary brake 
Top Drive Varco TDS-4S with PH-85 pipehandler 
Rotary National C-495, 49½in with independent drive 
Pipe Handling Manual 
Mud Pumps 2 x Oilwell A1700-PT, 1600 hp each 
Shale Shakers 1 x Brandt Dual Tandem ATL-CS; 2 x Brandt Linear Shakers 
Desander N/A 
Desilter 1 x Brandt SE-16 
Mud Cleaner 1 x Brandt ATL-MC16 Mud Cleaner 
BOP 2 x Cameron Type U Double 13-5/8in 10K; 1 x Hydril GK 13-5/8in 5K Annular; 1 x Type Q Double 21¼ in 2K; 1 x Hydril MSP 21¼ in 2K Annular 
Diverter 30in Regan KFL 2K Diverter System with two 12in outlets; 21¼ in 2K Diverter System with two 12in outlets 
Control System Koomey, Tseries Interface Module Model IT2-EPPRB09/03 
Choke & Kill 4-1/16in 10K choke manifold, 3-1/16in 10K remote choke, 2 x 2-1/16in 10K manual adjust chokes 
Cementing Halliburton SKE-4 (third party equipment) 

Machinery

Main Power 2 x EMD 16-645-E8 & 1 x EMD 12-645-E8 engines driving EMD AB20-6 1400 kW generator each 
Emergency Power 1 x Caterpillar 3408A, 275 kW, 480 V turbocharged generator set 
Power Distribution Ross Hill 1600 SCR, 3 generator controls, 4 x 1800 amps SCR bridges 
Deck Cranes 3 x MLT PCM-120AS electric cranes, 100 ft boom 50 st @ 24 ft; 1 x National OS-45, 100 ft boom 30 st @ 15 ft 

Jackup Specifications

Legs Square, 3 x 443 ft; Usable below hull 388 ft 
Leg Spacing Longitudinal 129 ft, Transverse 142 ft 
Spud Cans 46 ft diameter x 24 ft high 
Jacking System Electric rack and pinion system, 16 pinions per leg 
Cantilever/Slot Cantilever 

Mooring Equipment

Winches 4 x LeTourneau W-1500 electric winches 
Wire/Chain 4 x 2,000 ft x 1½in wirerope 
Anchors 2 x 10,000 lbs & 2 x 15,000 lbs Danforth anchors