Bollsta Dolphin

general

Name Bollsta Dolphin
Flag Singapore
Owner Bollsta Dolphin Pte. Ltd
Manager Dolphin Drilling Ltd.
Year Built 2015
Builder Hyundai Heavy Industries, Ulsan/Gunsan, South-Korea
Design Moss CS 60 E, 6th generation semi-submersible
Classification 1A1, “Column Stabilised Unit”, Drilling Unit (N), DRILL (N), ISDS, DYNPOS AUTRO, DYNPOS ER, POSMOOR ATA, E0, HELDK-SH, CRANE (N), CLEAN DESIGN, BIS, DRILL(US), BWTS

drillingequipment

Derrick 210 x 49 x 52 ft, single drilling derrick with offline activity, 1250 st static capacity
Drawworks SSGD, 5750 hp drawworks,1000 st
Rotary table 60 ½”
Topdrive TDX-1000
Riser Tensioners Total 3,600,000 lb, 50 ft stroke
Motion Compensators CMC, 1000 st static / 500 st dynamic, 25 ft stroke
Mud Pumps 4 x NOV 2200 hp, 7500 psi, triplex
BOP system 2 set 18-3/4” 15M dual annular six rams BOP stack

operatingparameters

Water Depth 10,000 ft (3000 m) (equipped for 7,500 feet (2286 m))
Maximum Drilling Depth 40,000 ft (12,200 m)
Transit Speed 8-10 knots approx.
Survival Conditions 100 year design conditions
Drilling Conditions Hs = 9 m, Tz = 12 s, V(1min) = 30 m/s, Vc = 0,8 m
 
Length 403 ft (122.56 m)
Breadth 255 ft (77,76 m)
Depth (deck box) 28,2 ft (8,6 m)
 
Variable Deck Load 7,500 tons
Reserve Mud Tanks abt 1300 m3
Active Mud Tanks abt 950 m3
6 Dry Bulk mud tanks abt 430 m3 (total)
6 Dry Cement mud tanks abt 430 m3 (total)