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The Fleet  Our Rigs List by Location J. W. McLean
Fleet Specifications
| J. W. McLean |
| The J. W. McLean is a Zapata SS-3000 class semisubmersible, a propulsion assisted twin hulled sea barge catamaran with six stabilizing columns and a water tight working platform |
| Rig Type |
Other Floaters |
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| Design |
Zapata SS-3000 |
| Builder |
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| Year Built |
1974/1991/1996 |
| Classification |
1A1 Column Stabilized |
| Flag |
Marshall Islands |
| Accommodation |
Air-conditioned to accommodate 100 people |
| Helideck |
'D' value 22.5 m (72.8 ft.) 84 ft. x 83 ft. (25.6 m x 25.3 m) designed to DNV / Norwegian rules, to accommodate Sikorsky S-61. |
| Moonpool |
21 ft x 21 ft |
| Station Keeping |
Moored (Propulsion Assist) |
| Max Drill Depth |
25,000 ft / 7,620 m |
| Max Water Depth |
1,250 ft / 381 m |
| Operating Conditions |
55-knot winds, 30-foot waves at 10 seconds, current 1.4 knots |
| Storm Conditions |
123-knot winds, 100-foot waves maximum at 3 seconds, current 0.5 knots |
Technical Dimensions
| Length |
367 ft |
112 m |
| Breadth |
210 ft |
64 m |
| Depth |
25 ft |
8 m |
| Operating Draft |
80 ft |
24 m |
| Ocean Transit Draft |
25 ft |
8 m |
| VDL - Operating |
3,829 st |
3,475 mt |
Capacities
| Liquid Mud |
3,332 bbls |
18,708 cu ft |
529 cu m |
| Drill Water |
8,000 bbls |
44,916 cu ft |
1,271 cu m |
| Potable Water |
2,700 bbls |
15,159 cu ft |
429 cu m |
| Fuel Oil |
10,000 bbls |
56,145 cu ft |
1,589 cu m |
| Bulk Mud |
|
8,970 cu ft |
254 cu m |
| Bulk Cement |
|
10,350 cu ft |
293 cu m |
| Sack Material |
4,000 sacks |
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Drilling Equipment
| Derrick |
Lee C. Moore 180 ft. dynamic derrick with 40 ft. x 40 ft. base. Rated 1,300,000 lbs. gross nominal capacity, with 1,000,000 lb. hook load capacity with (12) lines. |
| Drawworks |
Oilwell E3000 with Crown-O-Matic and Baylor model 7838 electro-magnetic brake, sandline spool with 18,000 ft. of 9/16 |
| Motion Compensator |
Rucker Shaffer DSC-25-500 |
| Top Drive |
Varco TDS 4S complete with PH 85 and Raised Backup System (RBS), Hi-Torque GE 752 motor |
| Rotary |
- Oilwell A-495, 49-1/2 |
| Pipe Handling |
1 x Varco AR3200 Iron Roughneck |
| Mud Pumps |
Three (3) Oilwell 1,700 PT triplex mud pumps rated at 1,700 hp and at 120 SPM |
| Shale Shakers |
4 - Derrick Model 2000 with Hi G motors |
| Desander |
None |
| Desilter |
20 x 4-inch cones mounted above a shaker |
| Mud Cleaner |
One shaker configured as a mud cleaner |
| BOP |
Cameron Type U Model II, 18 ¾ in., 10,000 psi |
| LMRP |
Shaffer Type Annular 5K WP |
| Diverter |
Regan/KFDH, 500 psi WP, Bore size 24.5 inches |
| Control System |
Koomey Type 80 with 500 gallon reservoir |
| Riser |
Vetco MR-6C 20-1/2 (21-1/2-inch OD) |
Riser
Tensioners |
8 - Rucker Shaeffer MRT's each with (2) 40 ft. line travel x 80,000 lbs. tensioners, total 640,000 lbs. |
Guideline
Tensioners |
4 x Rucker Shaffer, 12.2m stroke travel & 7.3MT |
Podline
Tensioners |
None, lines are suspended off angel wings |
| Choke & Kill |
Cameron 3-1/8-inch x 10K |
| Cementing |
Halliburton HCS-250 |
Machinery
| Main Power |
4 - EMD Model 16-645-E8 marine diesel engines rated ABS continuous 1,950 bhp at 900 rpm each skid mounted unit includes: 1 EMD Model A20 AC alternator ABS rated and certified for 1,400 kw 2,000 KVA, for SCR system application |
| Emergency Power |
1 - Cummins turbocharged engine w/ 600 kw Marine AC Generator |
| Power Distribution |
6 x Ross Hill SCR, plus 1 Bauteil SCR |
| Deck Cranes |
1 - National OS-435, 41-ton, 10-m, 1 each Amclyde 35000, 68-ton, 10-m |
| Thrusters |
N/A |
| Propulsion |
Propulsion assist, 2 x 10 dia. propellers w/ Kort nozzles ea. driven by 4 x 850 hp electric motors |
Mooring Equipment
| Winches |
10 x Skagit rated for 159 mt |
| Wire/Chain |
10 x 3 inch stud linked ORQ, usefull length - 3608 ft |
| Anchors |
10 x Stevpis MKV each weighing 15mt |
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