Specifications - Maersk Drilling

Maersk
Discoverer
Ultra deepwater
drilling and development
semi-submersible

Maersk Drilling
Maersk Discoverer
Maersk
Discoverer
TYPE
DPS2/M, Column stabilised dynamically positioned semisubmersible
drilling rig with capability to attach to an 8-point
pre-installed mooring system; provisions to attach to a
12-point pre-installed mooring system
BUILT
KeppelFELS, Singapore , 2009
Maersk Drilling is a considerable player in the ultra deepwater
market with four newly built drillships and three Ultra
Deepwater Development semi-submersibles.
The three semi-subs are DP rigs designed for year-round
operation in areas such as Brazil, the Gulf of Mexico, West
Africa and Asia pacific at water depths up to 3,000 m
(10,000 ft).
CLASS
American Bureau of Shipping
FLAG
Singapore
Main advantages
• Exploratory, appraisal and development drilling
• Batch drilling and completion of multiple well clusters
• Installation of subsea facility components
• Derrick – 1,361 t (3,000,000 lbs) combined load rating
Max. 2,500,000 lbs single load rating
• Main hoisting system – 910 t (2,000,000 lbs) capacity
• Auxiliary hoisting system – 680 t (1,500,000 lbs) capacity
• Large 5-chair driller’s cabin with automated sequenced
pipe handling operations
• Automated and dust-free bulk, mud and chemical transfer
and mixing systems
• Hydraulic work baskets and service platforms providing
safe access for servicing of major drilling equipment
• Deck drainage, containment and treatment systems for
controlled discharge
• Large heave compensated knuckle-boom crane (165 t lift
capacity from deck to deck) with winch for deployment of
subsea trees and other components up to 100 t over the
side of the rig to 3,000 m water depth

Maersk Drilling
Maersk Discoverer
Main particulars
DIMENSIONS IMPERIAL METRIC
Length overall 384 ft 117 m
Width overall 256 ft 78 m
Length of pontoons 376 ft 115 m
Pontoon (width / height) 57 ft / 33 ft 18 m / 10 m
Columns 55 ft x 57 ft 17 m x 18 m
Upper hull (length / width) 259 ft / 258 ft 78.5 m / 78 m
Moonpool opening 108.3 ft x 29.5 ft 33 m x 9 m
Draft operational (max / min) 67.3 ft / 60.7 ft 20.5 m / 18.5 m
Draft transit 31.8 ft 9.7 m
PARTICULARS IMPERIAL METRIC
Rated drilling depth 40,000 ft 12,000 m
Hook load static (main) 2,500,000 lbs 1,134 t
Hook load static (aux) 1,500,000 lbs 680 t
Rotary load static (main) 2,756,000 lbs 1,250 t
Rotary load static (aux) 2,000,000 lbs 907 t
Setback load 2,646,000 lbs 1,200 t
Variable deck load (max / transit) 15,400,000 lbs / 10,120,000 lbs 7,000 t / 4,600 t
Variable column load (max / transit) 3,300,000 lbs / 880,000 lbs 1,500 / 400 t
Variable pontoon load (max / transit) 11,000,000 lbs / 4,400,000 lbs 5,000 t / 2,000 t
Total payload (max / transit) 29,900,000 lbs / 15,400,000 lbs 13,500 t / 7,000 t
Riser tensioner load 4,200,000 lbs 1,906 t
Pipe rack area 10,765 f t2 1,000 m2
WEATHER/DESIGN CRITERIA (SURVIVAL) IMPERIAL METRIC
Water depth (moored in less than 1,640 ft / 500 m) 328 ft – 10,000 ft 100 m – 3,000 m
Wind speed 56 knots 29 m/sec
Wave height (Hs) 26.2 ft 8 m
Wave period 12.3 s 12.3 s
Current (surface) 1.7 knots 0.9 m/sec
CAPACITIES IMPERIAL METRIC
Drill water 12,580 bbl 2,000 m³
Potable water 5,032 bbl 800 m³
Fuel oil 25,160 bbl 4,000 m³
Brine 4,718 bbl 750 m³
Base oil 4,718 bbl 750 m³
Liquid mud (surface pits) 9,435 bbl 1,500 m³
Liquid mud (pontoons) 9,435 bbl 1,500 m³
Bulk mud 24,000 ft³ 680 m³
Bulk cement 24,000 ft³ 680 m³
Sack material 2,160 f t³ 200 m³
Accommodation 180 people 180 people
Derrick rated for US GOM category 4 hurricane

Maersk Drilling
Maersk Discoverer
Key features
CROWN MOUNTED COMPENSATION
Main rotary: static / compensating load 2,500,000 lbs /
1,000,000 lbs (1,134 t / 454 t). Hydraulic locking with
25 ft stroke. Auxiliary rotary: static / compensating load
1,500,000 lbs / 750,000 lbs (680 t / 340 t). Hydraulic locking
with 25 ft stroke. Active heave compensation mode
available.
DERRICK AND HOISTING SYSTEMS
Rated drilling depth capacity 30, 000 ft. MAIN side equipped
with hoisting System capable of 2,500,000 lbs static hook
load. Drawworks: 6,000 hp. Top drive: 2,000,000 lbs capacity.
Rotary: 60 ½”. AUX side equipped with hoisting System
capable of 1,500,000 lbs hook load. Drawworks: 4,500 hp
Top Drive: 1,500,000 lbs capacity. Rotary: 60 ½”.
TUBULAR HANDLING SYSTEMS
Primary mover is one pipehandling knuckle-boom crane
feeding two horizontal pipe conveyor / skate systems. Two
V-door stand-building and tripping machines. Two column
rackers for pipe handling and two iron roughnecks. Offline
casing make-up capability drill string / casing vertical
setback designed for 3” – 16”. Tubulars racked in nominal
135 ft stand lengths. Marine riser vertical storage for 126 ea.
75 ft of riser joints. Total 9,450 ft plus two telescoping joints;
additional storage area for drilling riser on deck.
DRILL STRING AND TUBULARS
In excess of 50,000 ft setback capability for drill pipe, work
string and casing running string, capable of racking 25,000 ft
of 6 ⅝” drill pipe. Approximately 15,000 ft of 9 ⅝” casing
racking capacity in addition to drill string.
MARINE RISER AND TENSIONING SYSTEMS
Clip riser with two 15,000 psi choke & kill lines, one 7,500 psi
booster line, two hydraulic conduit lines total 10,000 ft of
riser, 75 ft length joints and 21” OD Riser tensioning system
consisting of 6 x 700,000 lbs N-line cylinder riser tensioners.
Tripsaver system to allow movement of BOP and riser to wet
storage position.
BOP AND SUBSEA TREE HANDLING SYSTEMS
At port side of the main deck: BOP overhead (gantry type)
crane: 2 x 125 t. In the moonpool: BOP transporter: 400 t.
Subsea tree overhead crane installed underneath drill floor +
subsea tree staging and skidding system. Subsea tree cart
underhull guide systems each rotary.
WELL CONTROL EQUIPMENT
18 ¾” BOP – 15,000 psi equipped with two annular + six ram
preventers. The lower ram can be configured as a test ram.
Multiplex BOP control system; redundancy to allow both
pods to operate with one MUX cable. 60 ½” diverter system
and riser gas handler, choke & kill manifold, 15,000 psi and
mud gas separator, 12 MMscfd.
HP MUD SYSTEM
Four 2,200 hp mud pumps rated for 7,500 psi.
MUD RETURN SYSTEM
System design to minimise time displacing mud system /
completion fluids and capable of handling more than one
mud system. Provisions for centrifuge and cuttings dryer
installation. Completion fluid capability. Eight shale shakers.
Cuttings blower system.
MUD AND BULK SYSTEM
Fitted with two automatic sack cutting machines in sack
store and one bigbag machine: One dual liquid additive
pump unit. Four surge tank outlet feeders, four automatic
mud mixing hoppers, one caustic mixing unit. Two HP mud
shearing devices.
PROVISIONS FOR 3 RD PARTY EQUIPMENT
Designed for two large work class ROV systems
(Oceaneering Millenium +) port forward and starboard aft for
flexibility of operation. Diesel cementing unit (Schlumberger).
Staging area for subsea completion equipment, including
subsea tree transport system. Completion equipment,
including well test equipment and coil tubing. Dedicated
control rooms, store rooms and offices for 3 rd party system
operators.
POWER SYSTEMS
8 generators x 4,800 kw(e), 11 kVAC, 60 Hz, divided into two
self-contained power plants. Power Distribution System:
690 VAC, 60 Hz IT. One emergency generator: 1,500 kW(e).
POSITIONING SYSTEMS
DP Class 2: power management system and position,
reference systems to DP Class 3. Azimuthing thrusters
8 x 4,000 kW(e) of min. 700 kN static thrust each. Optional
moored operation: four double drum windlasses for 3.”
K4 chains, 8 x 600 m K-4 chain for attachment to a preinstalled.
Space for additional windlasses and chain for
12-point mooring system.

Maersk Drilling
Maersk Discoverer
CRANES
Port deck crane: Knuckle-boom crane with 3,000 m, 3” wire
for deployment of subsea trees and other modules up to
100 t heave compensated over the side of the rig. 165 t lift
capability from supply boat. Auxiliary whipline hoist 15 t SWL
@ 50 m. Starboard deck crane: 50 m max. reach, SWL 60 t @
20 m dynamic. One pipehandling knuckle-boom crane: 30 m
max. reach, SWL 12 t @ 10 m.
HELICOPTER DECK
Helicopter deck suitable for an EH101 helicopter or Sikorsky
S61.
SAFETY EQUIPMENT
Lifesaving and firefighting equipment in accordance with
Singapore flag state requirements and the IMO MODU code
2001. The rig holds a vessel specific safety case which has
been approved by HSE UK.
ACCOMMODATION
Accommodation for 180 people in 10 one-man rooms and 85
two-men rooms. Ample office spaces and conference rooms
for clients and 3rd party service contractors. Recreation
rooms, total area of 270 m2.

Maersk Drilling
Maersk Discoverer
Drilling features
The rig includes a number of innovative features, which enhance the capacity and flexibility for
multiple concurrent activities and improve the drilling efficiency. Back-up facilities and solutions
are generally provided to reduce the impact of equipment failures.
Rig Floor
FLEXIBILITY FOR MULTIPLE ACTIVITIES
• Two hoisting / rotary systems
• Large setback area for drill pipe, casing and completion
riser outside of derrick / drillfloor
• Offline pipe handling capability : standbuilding, casing
make-up and rack back
• Transfer of drill string, casing and riser from outside of
derrick / drillfloor
Moonpool
LARGE MOONPOOL;
FLEXIBILITY FOR MULTIPLE ACTIVITIES
• N-Line riser tensioner system with tripsaver
• Transfer of equipment across the moonpool
• Dedicated off-line ‘wet parking’ position for BOP / drilling
riser
• BOP handling area (starboard side)
• Subsea tree staging area (port side)
OPTIMUM LAYOUT FOR SUBSEA COMPLETION
• Capability for large umbilical and services (tubing hanger
running tool or subsurface test tree)
• Additional space for small umbilicals for completion
accessories
Optimised layout
The hull design and layout are based on the operational experience of various deepwater operators
and third party system suppliers and incorporate a number of innovative ideas from our potential
customers. Great emphasis has been made on optimising the rig’s layout to facilitate flexibili ty in
installation and operation of third party equipment.
Subsea completions
FLEXIBLE SYSTEM FOR
MULTIPLE WELL SUBSEA DEVELOPMENTS
• Option to deploy equipment through the main well centre
or over the side by large knuckle-boom crane
• Large staging area for multiple subsea trees and
accessories
• Flexibility in subsea tree handling area for various subsea
system designs
• High load capacity for flatbed transporter and tree cart
• High vertical clearance in moonpool for subsea system
stack-up and transport
Logistics
MAXIMUM USUABLE DECK SPACE FOR OPTIMUM
LAYOUT OF DRILLING AND COMPLETION EQUIPMENT
• 9,600 ft (2,926 m) vertical riser storage
• Large vertical drill pipe and casing setback area
• Large pipe rack area (aft) for deepwater completion
equipment layout
• Well test equipment
• Tubing / downhole tools
• Completion riser accessories
• Completion fluids / filtration
• Stimulation
• Coil tubing
• Primary ROV within upper hull ; 2 nd ROV location on aft deck

Maersk Drilling
Maersk Discoverer
Drilling features
TOP VIEW AND DRILL FLOOR
TANK TOP

Maersk Drilling
Maersk Discoverer
SIDE VIEW

October 2014
Head office:
Maersk Drilling
50, Esplanaden
1098 Copenhagen K
Denmark
Telephone: +45 3363 3363
Telefax: +45 3363 3182
E-mail: copenhagen@maerskdrilling.com
www.maerskdrilling.com
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of service or equipment or performance that might be available (ii) intended to be no more than an invitation to treat (iii) subject to contract and possible change or alteration at our discretion and without notice to you (iv) not to be relied
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