MaerskDiscoverer

Ultra deepwater drilling and development

semi-submersible

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Maersk Drilling Maersk Discoverer

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 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

MaerskDiscovererTYPE

DPS2/M, Column stabilised dynamically positioned semi-

submersible 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

CLASS

American Bureau of Shipping

FLAG

Singapore

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).

• 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

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Maersk Drilling Maersk Discoverer

Main particulars

Derrick rated for US GOM category 4 hurricane

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 ft2 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 ft³ 200 m³

Accommodation 180 people 180 people

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Maersk Drilling Maersk Discoverer

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 3RD 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 3rd 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 pre-

installed. Space for additional windlasses and chain for

12-point mooring system.

Key features

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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.

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Maersk Drilling Maersk Discoverer

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.

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.

Drilling features

Optimised layout

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

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

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

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)

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 ; 2nd ROV location on aft deck

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Maersk Drilling Maersk Discoverer

Drilling featuresTOP VIEW AND DRILL FLOOR

TANK TOP

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SIDE VIEW

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“DISCLAIMER: This brochure is for promotional purposes only. All descriptions, specifications and other information contained in this brochure and/or in any accompanying material is: (i) intended to give only a general indication of the sorts 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 upon by you for any purposes whatsoever when entering into any legally binding agreement with us.”

Head office:

Maersk Drilling50, Esplanaden1098 Copenhagen KDenmark

Telephone: +45 3363 3363Telefax: +45 3363 3182

E-mail: copenhagen@maerskdrilling.comwww.maerskdrilling.com

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October 2014

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