GENERAL
Name : North Dragon
Flag : Bahamas
Builder : Yantai CIMC Raffles Offshore Limited
Designer : Global Maritime & CIMC Raffles
Class : DNV GL
Notations : +1A1 Column Stabilized Drilling Unit (N), DRILL(N), HELDK-SH,CRANE(N),DYNPOS-AUTRO, POSMOOR-ATA, E0, CLEAN, ICE-T, WINTERIZED BASIC
PRINCIPAL DIMENSIONS
LOA  Pontoon : 106,75m
Beam : 73,70m
Elevation of main deck : 42.0m
Deck Box
Length : 88,15m
Width : 73,10m
Elevation of box bottom : 34,00m
Draft
Operation Draft : 21,0m
Survival Draft : 19,0m
Transit Draft : 10,1m
Displacement
Displacement : 32,700-45,700T
DESIGN ENVIROMENT
Survival condition : Hs=17,3m
Operation condition : Hs=8,0m
Transit condition : Hs=5m
Sea water temperature : 0°C to 32° C
Outside air temperature : -20°C to 35°C
Strukture design temperature : -25°C
Fatigue life : 20 years
OPERATION AREA
World wide including NCS & UKCS
OPERATING PARAMETTERS
Water depth : 500m (can etend to 1200m)
Drilling Depth : 8000m
VDL : 4100T
TANK CAPACITY
Bulk barite/tank : 362㎥
Bulk Cement tank : 356㎥
Liquid mud (columns) : 641㎥
Mud pit : 674㎥
Brine tank : 1,105㎥
Base oil tank : 632㎥
Drilling water storage tank : 1,737㎥
Potable Water Tank : 579㎥
Fuel oil tank : 4,681㎥
Stop tank : 298㎥
DRILLING   PACKAGE NOV
Derrick capacity : 680mT (1,500,000Ibs/750 short ton)
Base : 15m x 16m
Rotary table : 60-1/2″
Top Drive :1x680mT, 2x746kW, Break out 170 kNm, 7,500 psi
Draw work Dynamic : 680mT, 4600 HP
Catwalk machine : 1 x main catwalk

: 1 x aux catwalk

Finger board : Triple 3 x Range2 (or 2xRange3)
– 273 stands of 5 7/8″DP and
– 56 stands of 13 3/8″ CSG and
– 11 stands of 9 1/2″ DC and
– 1 BHA
Vertical pipe handler : NOV Hydraracker (column racker)
BOP handling : 300T SWL BOP Trolley/Elevator
Crown block
Passive comp.(CHC)
Active comp. for CHC
: 680mT

: 454mT (1,000 kips), 25′

: 25mT, 25′

Aux. Roughneck : Break out torgque 200 kNm
Main roughneck : Break out torque 200 kNm
Knuckle boom   Crane : Rigging: 35T @ 6.5-30m
Riser tensioner : 8 x 54.5T
BOP/WELL CONTROL
BOP : 18¾” 15000psi 5 rams, 1 annular.

(space for second annular)

Marine riser : 50`length, total of 500 m
Slip joint : 50` stroke length
MUD PUMPS
 3 x 2200 HP 9″ x 14″ single acting triplex pumps, 7,500 psi
HELIDECK
1 x Helideck suitable for Sikorsky S-61N, Super Puma,Sikorsky S92
ACCOMMODATION
130 single cabins (According to NORSOK requirements)
MAIN POWER SYSTEM
Main Generator Set : 6x 5,535kWe
Emergency Generator Two main genarators are outfitted as emergency generator
THRUSTER
Thruster : 6 x 4,500 kW fully azimuth thruster
(86mT thrust each)
STATION KEEPING
Dynamically Positioned : DP3 (IMO)
8 Point Mooring system : 750m, 96mm wire, 385 mT Stall pull on 5’Th layer
MAIN CRANE
Main Deck Crane : 2 x 80 mT offshorecrane
(Whip 17 mT)