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ARCTIC SSEMI-SUBMERSIBLE
DRILLING UNITHUISMAN PRODUCT BROCHURE
1. DESCRIPTION
1.1 Unit general
The Huisman designed Arctic S allows to operate at different
drafts resulting in three main operating modes. The unique
design combines the advantages of a conventional semi-
submersible resulting in very low motions in waves and a
heavily strengthened ice resistant unit when operating in ice
at deep draft afloat. In third operating mode the unit acts as a
gravity based structure.
The Arctic S drilling unit is designed to drill wells in arctic
conditions, moored in ice infested waters with ice thickness
up to approximately 1.0-1.5 meter. The unit consists of a
round floater, eight columns and a round deckbox.
When operating in ice the unit will ballast to ice draft (partly
submerged deckbox) to protect the riser against level ice,
rubble and ice ridges. The round conical shaped deckbox has
a heavily strengthened structure at waterline level to deflect
and break the ice.
Station keeping in ice infested waters is achieved by a sixteen
(16) point mooring system. The unit can operate in water-
depths between 35 and 1000m (115 and 3000ft). When no
ice is present the unit operates at its operating draft as a
conventional semi-submersible unit. The Arctic S is designed
for year round operations in the Arctic. Depending on ice
conditions, ice management can be required.
For shallow water with water depths between 12 and 30.5m
(40 and 100ft) the unit can be set on the sea bed. This depth
can be increased by using seabed templates to approx. 50m
water depth. Therefore also the columns and the round floater
are strengthened to withstand ice loads. Skirts are installed
under the pontoon for increasing lateral resistance of the
seabed.
ARCTIC S
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SEMI-SUBMERSIBLE DRILLING UNIT
ARCTIC S ADVANTAGES
Large drillers payload of 16000mt - efficiency
Excellent ice resistance due to round conical shape of deckbox - workability
Excellent motion characteristics when at open water draft - workability
In shallow water unit can be set on the seabed - workability
High mooring capacity utilising 16 point mooring system - workability
Drill floor flush with main deck allowing safe and easy operations - safety
Enclosed working and survival areas - safety, workability
Heat tracing on exposed walk ways, stairs and handrails - safety
ARCTIC S
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SEMI-SUBMERSIBLE DRILLING UNIT
The complete drilling system is enclosed to provide an
acceptable working environment. Because of the integrated
design of the BOP handling system, the substructure is flush
with the main deck of the vessel. Materials can therefore be
handled in a safe way.
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SEMI-SUBMERSIBLE DRILLING UNIT
1.2 Winterization
The design of the unit includes the following low temperature
features:
Enclosed derrick and working areas (approx. 2500 m2);
Enclosed lifeboats, life rafts and MOB boat, mooring
windlasses and loading hose stations;
Enclosed ROV areas and protected launching;
Enclosed riser storage and pipe rack area;
Heat tracing and snow covers on exposed escape ways;
Heat tracing of exposed pipes, sealing of exposed doors
and hatches;
Heat tracing of all exposed stairs, walkways and heli-
decks;
Insulation and/or heat tracing on all fluid piping which may
freeze;
Heating coils for exposed tanks;
Thermal insulation of upper hull.
Furthermore the vessel is designed for zero spill and
emissions to air according to Arctic requirements.
1.3 Accommodation
The unit has accommodation for 200 persons in single and
twin cabins. Further, the accommodation is outfitted with
offices, changing rooms and laundry facilities, mess room,
galley and provision stores, hospital, cinema, games room,
library, internet room, gymnasium and saunas.
1.4 Power
The unit will be fitted with two engine rooms. Each engine
room is fitted with four engines. The unit will be fitted out with
a vessel management system. Almost all equipment is AC
electric driven. Power regeneration and high efficiency result
in lower fuel consumption. Closed working areas
Transversal Cross section, FR0
Cylindrical Type Unit
Arctic S
ARCTIC S
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SEMI-SUBMERSIBLE DRILLING UNIT
1.5 Motions Characteristics
The Arctic S has excellent motion characteristics. The heave
motion of the Arctic S is even better than the heave motion of
a conventional semi-submersible.
Excellent seakeeping performance is confirmed by extensive
model testing in a seakeeping tank for a similar, larger design.
The tests are performed for operating, survival, transit and ice
drafts. The motions were monitored. The sufficiency of airgap
is verified.
Model tests in irregular waves in survival condition meeting
the wave Hsig
=17.4m
Model tests in irregular waves at open water operating draft
JBF 14000 (typical semi)
1.6 Ice resistance
The investigation on the ice loads and the behaviour in ice is
conducted in an ice tank for a similar larger design. The unit
has been tested at two drafts. The tests at the operational ice
draft provided the global ice loads necessary for the design
of the mooring system. The tests at the transit draft allowed
checking the feasibility of the transit in ice.
1.8 Drilling equipment
Since the unit will operate in arctic conditions, the complete
drilling system is enclosed to provide an acceptable working
environment. The design of the drilling equipment set is
new but it is based on proven components. The complete
functioning package comprises:
2.4 million pound derrick system
Vertical pipe handling gear, capable of handling 135ft
stands
Substructure with 1.28 million pound riser tensioning
system
Electric and hydraulic power and control systems
Horizontal pipe handling gear (catwalk machines, pipe and
riser overhead cranes)
Skid systems, BOP overhead cranes and deck cranes
1.7 Mooring system
A 16 point mooring system is utilized. On the vessel side
16 chain lines are provided. Depending on the water depth
different pre-laid systems will be utilized. In shallow water the
chain lines will be sufficient. In deeper waters polyester lines
will be required for a chain/wire/chain configuration.
The mooring system is designed to withstand the forces from
the drifting ice with thickness up to approximately 1.0-1.5m
unbroken level ice.
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SEMI-SUBMERSIBLE DRILLING UNIT
Model tests in ice (ice draft and transit draft)
Efficiency
The Drilling Equipment Set (DES) contains the drilling system.
The system has dual drawworks allowing transferring of
the drill line from one drum to the other eliminating slip-cut
procedures, saving several hours each time the wire would
normally be cut. The system has splittable blocks on the
travelling block. The splittable blocks allow push button
reeving change from 16 to 12, 8 or 4 falls when handling
lighter loads, increasing the block speed and the effective
stroke of the passive heave compensation cylinders. Because
of the design of the BOP handling system, the substructure
can be flush with the main deck of the vessel, approximately
15m lower than on a conventional semisubmersible. The
reduced height of the substructure lowers the centre of
gravity.
Safety
Since the drill floor and catwalks are flush with the main
deck, materials can be handled much safer. Most machinery
(drawworks, heave compensators etc.) is located inside the
enclosed derrick providing a safe and protected area for
maintenance.
Redundancy
The complete system is designed with an extreme high
redundancy:
Dual drawworks, allowing 100% load to be handled at half
the speed with one drawworks drum out of order.
Dual Passive Heave Compensator cylinders, allowing 100%
load to be compensated at half the stroke with one cylinder
blocked.
Active Heave Compensation with Passive Heave
compensation as backup.
Four pipe rackers, providing redundant pipe handling.
Electrical and hydraulic power units split into two sections
and fed from two vessel switchboards, securing power at
all times.
Redundant PLC and SCADA network.
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SEMI-SUBMERSIBLE DRILLING UNIT
EQUIPMENT ADVANTAGES
The system has dual drawworks allowing transferring the
drill line from one drum to the other eliminating slip-cut
procedures - time saving
When one of the Dual drawworks drums is out of order,
the full load can still be hoisted although at half the speed -
redundancy
The system has Active Heave Compensation on the
drawworks as well as Passive compensation with Hydraulic
cylinders - efficiency, redundancy
The system has splittable blocks on the travelling block
allowing push button reeving change from 16 to 12, 8 or 4
falls when handling lighter loads, increasing the block speed
with a factor of maximal 4 - time saving
The system has four pipe rackers and a large setback -
redundancy, efficiency
1.9 Integrated control system
An in-house developed integrated control and monitoring
system ensures trouble free operation of the rig. This means
full control of all equipment from a single control system
without any third party interfaces.
The drilling system is controlled mainly from the driller’s cabin
and the aft driller’s cabin. However, in case of malfunction
of the control system, most equipment can be controlled
manually as well.
The control system consists of the following main
components:
Central PLC
Remote Input/Output stations
Operator chairs and SCADA screens
All regularly used controls, switches and joysticks are located
on the operator control chairs. To keep the control chairs as
simple as possible, the readout of process-measured values,
status, warning, alarms and job dependent settings are
incorporated in the SCADA system.
Included in the control system is the Huisman Geolograph.
This system is used during drilling and evaluation of the drilling
data. The system is developed with the following features:
Monitoring of all relevant drilling parameters on the rig
Exporting of drilling data in Excel format for in-depth
evaluation enabling the driller and the company man to
make decisions during critical operations
Integration with the rig control system, making use of the
sensors already present.
The control system is prepared for a satellite/telephone
modem connection for service engineers to log on to the
system from the office. This utility can be used for providing
real time drilling data to the office, troubleshooting, software
updates, and for remote service assistance from Huisman’s
engineers. The layout of the control system links all devices
to one single network which is connected to the satellite /
telephone modem. To ensure safe operation, the connection
to the rig uses a secure VPN tunnel.
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SEMI-SUBMERSIBLE DRILLING UNIT
FEATURES
Complete control system from single supplier
Equipment outfitted with local backup controls
Remote access and troubleshooting
Huisman Geolograph included
Drillers cabin interior
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SEMI-SUBMERSIBLE DRILLING UNIT 2. TECHNICAL SPECIFICATION
GENERALGENERAL
MAIN DIMENSIONS
MARINE SYSTEMS
PAYLOAD
Maximum water depth (open water)
Maximum water depth (ice infested water)
Maximum water depth (sitting on the seabed)
Max. drilling depth from water line
Classification
Deckbox top diameter
Deckbox bottom diameter
Deckbox height
Column length
Column width
Lower hull outer diameter
Lower hull width
Lower hull height
Height of main deck above
base line
Deck area
Draught operational (ice)
Draught operational (open
water)
Draught survival
Draught transit
Lightweight
Displacement at transit
draught
Displacement at operational
open water draught
Displacement at operational
ice draught
Main engines
Total installed engine power
No. of independent engine rooms
Marine diesel oil tanks
Fresh water tanks
Drill water tanks
No. of ROV’s
Complement in one and two person cabins
Helicopter deck (1x), max. type helicopter
VDL operational (incl. drilling fluids in
pontoon, but excl. consumables and
mooring chain)
Transit payload (incl. drilling fluids in
pontoon, but excl. consumables and
mooring chain)
Mooring chain (16 x 300m / D = 102mm)
Mud tanks (pontoon)
Brine / Base oil tanks
Bulk silos
Bulk in sacks
1000 [m]
500 [m]
30.5 [m]
12190 [m]
ABS: ÀA1 Column Stabilized Drilling Unit Á
ÀAMS ÀACCU CDS HELIDK CRC
Ice Class PC 4
8 x 1.825 [eMW]
14.6 [MW]
2 [-]
4600 [cu m]
2000 [cu m]
2800 [cu m]
1 [-]
200 [-]
S-92, EH101 or similar
16000 [mt]
3500 [mt]
1600 [mt]
2200 [cu m]
2000 [cu m]
820 [cu m]
9000 [sacks]
17637 [st]
3858 [st]
1764 [st]
13836 [bbl]
12579 [bbl]
28958 [cu ft]
88.0 [m]
77.2 [m]
14.9 [m]
12.8 [m]
14.4 [m]
100.0 [m]
26.0 [m]
10.8 [m]
38.5 [m]
2500 [sq m]
29.2 [m]
18.5 [m]
17.0 [m]
10.3 [m]
47964 [mt]
57707 [mt]
79254 [mt]
108733[mt]
3280 [ft]
1640 [ft]
100 [ft]
40000 [ft]
8 x 2450 [eHP]
19597 [HP]
28931 [bbl]
12579 [bbl]
17610 [bbl]
288.7 [ft]
253.3 [ft]
48.9 [ft]
42.0 [ft]
47.2 [ft]
328.1 [ft]
85.3 [ft]
35.4 [ft]
126.3 [ft]
26910 [sq ft]
95.8 [ft]
60.7 [ft]
55.8 [ft]
33.8 [ft]
52871 [st]
63612 [st]
87362 [st]
119858 [st]
2.1 Unit
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TECHNICAL SPECIFICATION
DRILLING TOWER
HEAVE COMPENSATION
PIPE HANDLING SYSTEMS
SUBSTRUCTURE
RISER TENSIONERS
SKID CARTS
Static hook load
Clear height (under crown)
Free lifting height (under topdrive)
Stand length minimal, quad RII, 4 x 30 [ft]
Stand length maximal, triple RIII, 3 x 45 [ft]
Overall height above main deck
Power draw works
Power top drive
Max. capacity compensation system
Max. compensation stroke (AHC), 8 falls 550 [mt]
Based on regular waves with 15 [sec] period
Max. compensation stroke (PC), 8 falls 550 [mt]
Max. capacity total
Size of drill pipe
Size of casing or drill collar
Total length of drill pipe, triple RIII
Total length of casing, triple RIII
Height of drill floor above main deck (flush)
Rotary table internal diameter
Iron roughneck, type AR5000, max. torque
No. of riser tensioners
Total installed capacity
Max. total operation capacity
Maximum stroke on wire
Moonpool skid cart hang off capacity
Capacity SSBOP overhead crane
Capacity X-mas tree skid cart
Static hook load
Clear height (under crown)
Free lifting height (under topdrive)
Stand length minimal, quad RII, 4 x 30 [ft]
Stand length maximal, triple RIII, 3 x 45 [ft]
Overall height above main deck
Power draw works
Power top drive
1090 [mt]
61 [m]
48.0 [m]
Min.
Max.
66 [m]
4600 [kW]
860 [kW]
1090 [mt]
7.0 [m]
6.0 [m]
950 [mt]
3 1/2 up to
5 up to
10370 [m]
2880 [m]
0 [m]
1536 [mm]
216931 [Nm]
8 [-]
580 [mt]
457 [mt]
15.24 [m]
400 [mt]
400 [mt]
80 [mt]
0 [m]
60.5 [inch]
160000 [ft*lbs]
1280 [kips]
1008 [kips]
50 [ft]
880 [kips]
880 [kips]
176 [kips]
2400 [kips]
200 [ft]
157 [ft]
119 [ft]
141 [ft]
217 [ft]
6160 [HP]
1150 [HP]
2400 [kips]
23 [ft]
19.7 [ft]
2100 [kips]
6 5/8 [inch]
14 [inch]
34020 [ft]
9450 [ft]
2.2 Drilling Equipment
ARCTIC S
11
TECHNICAL SPECIFICATION
SUBSEA BOP
MARINE DRILLING RISER
CHOKE AND KILL MANIFOLD
DIVERTER
MUD SYSTEM
Internal diameter
Pressure rating
Number of ram preventers
Number of annular preventers
Control system
Diameter main tube
Outer diameter buoyancy
Depth rating
Riser joint length
Number of joints simultaneous on board
Stroke telescopic joint
Outer diameter telescopic joint
Pressure rating
Number of chokes
Diverter housing internal diameter
Diverter internal diameter
Diverter pressure rating
Outlet ball valves size
Gumbo box
Number of shakers (one mud cleaner)
Number of degasser
Mud treatment tanks, total volume (7 tanks)
Active mud tanks, total volume (10 tanks)
Reserve mud tanks, total volume
Number of mud pumps
Mud pump power (each)
Mud pump pressure
Dual stand pipe manifold pressure rating
Cement manifold pressure rating
1034 [bar]
6 [-]
2 [-]
MUX type
1270 [mm]
1220 [m]
22.86 [m]
48 [-]
19.81 [m]
1499 [mm]
21 [inch]
50 [inch]
4000 [ft]
75 [ft]
65 [ft]
59 [inch]
1034 [bar]
2 remote, 2 manual
1536 [mm]
540 [mm]
69 [bar]
406 [mm]
1 [-]
6 [-]
2 [-]
256 [cu m]
850 [cu m]
2400 [cu m]
4 [-]
1640 [kW]
520 [bar]
517 [bar]
1034 [bar]
60.5 [inch]
21 1/4 [inch]
1000 [psi]
16 [inch]
1600 [bbl]
5100 [bbl]
15000 [bbl]
2200 [HP]
7500 [psi]
7500 [psi]
15000 [psi]
18 3/4 [inch]
15000 [psi]
15000 [psi]
2.3 Well control equipment
2.4 Mud system
Note: Specifications might be subject to changes as the design progresses
HUISMAN EQUIPMENT BV
Admiraal Trompstraat 2
3115 HH Schiedam
P.O. Box 150
3100 AD Schiedam
The Netherlands
Harbour no. 561
Phone: +31 (0)88 070 2222
Fax: +31 (0)88 070 2220
E-mail: [email protected]
www.huismanequipment.com
102015
