Drilling Services
Key specifications of our jackup rigs: To Drilling Services

This jack-up drilling rig is the latest addition to our growing fleet of offshore drilling rigs. The COSL 941 is designed to provide first class drilling services in all weather environments. It holds ABS & CCS classification and is fully IMO compliance and certified. COSL has a proven track record in offshore drilling operations and assures its customers that our rigs will be operated according to stringent international and industry standards particularly in regards to Quality and HSE.

COSL 941
Design Criteria
Max/Min Operating Water Depth: 400/30 ft
Max Rated Drilling Depth: 30,000 ft
Storage Capacities
Fuel Oil: 23,307 ft3 (660 m3)
Lube oil: 198 ft3 (5.7 m3)
Drilling Water: 55,437 ft3 (1570 m3)
Potable Water: 19,423 ft3 (550 m3)
Bulk Mud: 8,962 ft3 (254 m3)
Bulk Cement: 8,962 ft3 (254 m3)
Heavy Mud Accepted: 847 ft3 (24 m3)
Total of Active Mud and Reserve Mud: (743 m3)
Main Dimensions
Length Overall£º 323.35¡¯ (100.08 meters)
Breadth Overall: 255.08¡¯ (77.75 meters)
Length of Hull: 230'-10" (70.4 meters)
Breadth of Hull: 249'-4" (76.0 meters)
Depth of Hull: 31'-0" (9.4 meters)
Overall Length of Leg: 548 ft including Spud Cans
Number of Legs: 3
Type of Legs: Independent/Triangular
Heli-Deck Diameter: 72'-10"x 72'-10"
Max. Cantilever Combined Load: 2,600 kips at 75ft/0ft
1,109 kips at 75ft/15ft
Living quarters: 120 persons per UK HSE
Maximum Gross Variable Load
Transit VL: 8,300kips (3765t)
Drilling VL: 10,000kips (4540t)
Survival VL: 6,600kips (2995t)
Jacking VL: 8,300kips (3765t)
Power Equipment
Main Diesel: Caterpillar 3516B-HD
Diesel Engines: 1603BKW x 5, 1200 rpm
Main Generators: 2000KVAx5, 60Hz,0.8pf
AC VFD Drilling System: 11EA,1200KW,Siemens
Drilling Equipment
Draw works: National SSGD-750-4600-50-82
Derrick: National D170 x 40-2000-JU-BN
Traveling Block: National HTB-750 7x60
Crown Block: National HL-CBC-750 6x60
Top Driver: National HPS 750-E-AC-1S-KT
Rotary Table: National D-495
BOP Equipment
BOP Stack: One Cameron 13-5/8¡± x 10000psi, DL type annular preventer
Two Cameron 13-5/8¡± x 15000psi, U type B model ram preventers
BOP Control System: ABB Offshore System Inc
Accommodation
Company Representative¡¯s Office: 3
Contractor¡¯s Representative¡¯s Office: 1
Control Room: 1
Radio Room: 1
Helicopter Assembly Room: 1
Hospital / No of Beds 1/2
Accommodations:  
Number of single rooms:
4
Number of double rooms:
58
Toilets: 64
Showers: 64
Galley: 2
Recreation Room: 2
Gym: 1
Changing Room: 2
Deck Crane
Crane: Three Seatrax 6024HD
Location: Port/Stb fwd/Stb Aft.
Boom Length: 120ft
Block capacities and hoisting speeds:  
Load/Radius/Speed(min.radius): 55.81/23 /1.1 t/ft (ft/sec)
Load/Radius/Speed (max. radius): 13.86/124.7/5.2 t/ft (ft/sec)
Jacking Systems and Rack chock system
Make/type: NOI-Nantes France/ BLM C150E
No. of jacks or pinions: 36 units
Maximum normal jacking capacity: 1,000kips (454T) /units
Maximum preload jacking capacity: 1,300kips (590T) /units
Jacking speed: 1.5 ft (0.45m) /min
Rack chocks available: Yes
 
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