PRIMER OF OFFSHORE DRILLING OPERATIONSAn Introduction to Transocean Offshore Drilling and Operations
We’re Never Out of Our Depth.
MAJOR TOPICSMAJOR TOPICS
Company OverviewCompany Overview Transocean Heritage and LegacyTransocean Heritage and Legacy Assets (People and Equipment)Assets (People and Equipment)
Drilling Offshore WellsDrilling Offshore Wells Arrival on LocationArrival on Location Primary Drilling EquipmentPrimary Drilling Equipment Offshore Well ConstructionOffshore Well Construction Life OffshoreLife Offshore
The Transocean AdvantageThe Transocean Advantage What makes Transocean THE PREMIER What makes Transocean THE PREMIER
OFFSHORE DRILLEROFFSHORE DRILLER
MISSION STATEMENTMISSION STATEMENT
Our mission is to be the premier offshore drilling Our mission is to be the premier offshore drilling company providing worldwide rig-based, well-company providing worldwide rig-based, well-construction services to our customers through construction services to our customers through the integration of the integration of MOTIVATED PEOPLE, QUALITY MOTIVATED PEOPLE, QUALITY EQUIPMENT AND INNOVATIVE TECHNOLOGYEQUIPMENT AND INNOVATIVE TECHNOLOGY, , with a particular focus on technically demanding with a particular focus on technically demanding environments.environments.
WHO IS TRANSOCEANWHO IS TRANSOCEAN
SEDCO FOREX
SONAT
TRANSOCEAN ASA
FALCON
READING & BATES
CLIFFS DRILLING
1996Q1 Q2 Q3 Q4
1997Q1 Q2 Q3 Q4
1998Q1 Q2 Q3 Q4
1999Q1 Q2 Q3 Q4
2000Q1 Q2 Q3 Q4
2001Q1 Q2 Q3 Q4
2002Q1 Q2 Q3 Q4
2003Q1 Q2 Q3 Q4
TRANSOCEAN
The Transocean we know today is the result of the merger of six (6) legacy companies.
Literally thousands of man-years experience in offshore operations.
Industry’s largest offshore contract driller
13 Fifth-Generation Deepwater Floaters capable of 7,000+ feet water depths
15 Other Deepwater Floaters capable of 4,500-7,000 feet water depths
4 Other High-Specification Floaters capable of harsh environ. operations
3 ultra-deepwater rigs in construction, 2 deepwater DP upgrades
COMPANY OVERVIEWCOMPANY OVERVIEW
LARGEST OFFSHORE RIG FLEETLARGEST OFFSHORE RIG FLEET
53
14 13
32
14
1
25
4541
13
2843
24
3
3
0
10
20
30
40
50
60
70
80
90
Transocean GlobalSantaFe Noble Diamond Pride Ensco Rowan
Semisubmersibles & Drillships Jackups Other MODU's
(1) Excludes ownership in barges, MOPU’s, platform rigs, land rigs, equity ownership positions and new rig construction
(2) Excludes a drillship utilized in a research mode
Source: SEC Form 8-K filings
78
59 54
4545
(2)
24
44
(1)
Total Fleet – 80 Rigs
Market Cap. - $31 Billion (1)
Total Assets - $10.6 Billion (2)
(1) As of July, 2007
(2) As of June 2006
DIVERSE GEOGRAPHIC DISTRIBUTIONDIVERSE GEOGRAPHIC DISTRIBUTION
TRANSOCEAN TECHNOLOGY FIRST’STRANSOCEAN TECHNOLOGY FIRST’S
1954: World’s First Offshore Jackup Drilling Rig – 1954: World’s First Offshore Jackup Drilling Rig – Rig 51Rig 51 1963:1963: World’s First Turret-Moored Drill ship – World’s First Turret-Moored Drill ship – Discoverer IDiscoverer I 1971: First Dynamically Positioned Drill ship – 1971: First Dynamically Positioned Drill ship – Sedco 445Sedco 445 1972: First DP Exploratory Well (1,300 Ft WD Brunei) – 1972: First DP Exploratory Well (1,300 Ft WD Brunei) – Sedco 445Sedco 445 1977: World’s First Dynamically Positioned Semi-submersible – 1977: World’s First Dynamically Positioned Semi-submersible –
Sedco 709Sedco 709 1985: World’s First Fourth-Generation Semi-submersible – 1985: World’s First Fourth-Generation Semi-submersible –
Polar PioneerPolar Pioneer 1986: First Rig To Drill Year-Round In The Barents Sea – 1986: First Rig To Drill Year-Round In The Barents Sea –
Transocean ArcticTransocean Arctic 1996: First Rig Capable Of Year-Round Operations West Of 1996: First Rig Capable Of Year-Round Operations West Of
Shetland Shetland Deeper Than 4,000 Ft WD – Deeper Than 4,000 Ft WD – Transocean LeaderTransocean Leader 1999:1999: First 10,000ft water depth Drill ship – First 10,000ft water depth Drill ship – Deepwater PathfinderDeepwater Pathfinder 1999: First Ultra-Deepwater Dual-Activity Drill ship – 1999: First Ultra-Deepwater Dual-Activity Drill ship – Discoverer EnterpriseDiscoverer Enterprise 2000: First Fifth-Generation Semi-submersible Rig –2000: First Fifth-Generation Semi-submersible Rig – Sedco ExpressSedco Express
Hold 19 of the past 23 Drilling Records:Hold 19 of the past 23 Drilling Records:
● World Record Water Depth 10,011 ft. (Discoverer Deep Seas)
● World Record Subsea Completion 8,960 ft. (Deepwater Millennium)
● World Record Moored Operations 8,951 ft. (Deepwater Nautilus)
● Deepest Oil & Gas Wells 34,189 ft. – measured (Discoverer Spirit) 32,613 ft. – vertical (Deepwater Nautilus)
● Drilled 80% of deepwater wells >30,000 ft. 50% of the wells > 25,000 ft
OFFSHORE LEADERSOFFSHORE LEADERS
HOW DEEP IS ULTRA-DEEP?HOW DEEP IS ULTRA-DEEP?Discoverer Enterprise in 8,100ftDiscoverer Enterprise in 8,100ft Water DepthWater Depth
• 8,100 ft just gets to the sea floor so drilling can begin
• Water pressure is about 3,500 psi (237-atm)
• Riser Joints are 75-ft long, so 108 joints are needed
• Everything is done through a 21-in. diameter pipe
PEOPLE ON THE RIG…PEOPLE ON THE RIG… Company Man
Client Representative onboard the rig Offshore Installation Manager (OIM)
Responsible for all operations onboard the rig Toolpusher
Responsible for all drilling-related activities Driller/Assistant Driller (AD)
Runs the drill floor. The AD is the eyes and ears of the driller outside the drillers’ cabin
Derrickman Stands back pipe at the finger board and looks after the mud
processing Roughneck
The rig floor laborer, performs all types of tasks on the drill floor Barge Supervisor
Responsible for the marine operation, manages cranes and deck crew
Roustabout General laborer, material handling
Maintenance Supervisor Manages the maintenance and upkeep of the installation
ASSETS – Jackup Rigs (25 Units)ASSETS – Jackup Rigs (25 Units)
Water Depth Range: 25-ft to 350-ft
Exploration (open water) or platform locations
Bottom Founded – (3) or (4) legs which elevate the hull above the water while drilling.
Spud cans attached to the bottom of the legs are supported by the soil.
Drilling Package “cantilevers” off the stern of the hull for drilling while operating.
Worldwide operations (West Africa, India, SE Asia, Middle East)
ASSETS – SEMI SUBMERSIBLESASSETS – SEMI SUBMERSIBLES
Moored and/or Dynamically Positioned
Similar Water Depth Capability to Drill Ships
Improved Motion Response over Monohull Drill Ships
Harsh Environment Operations
Generally less payload than Drill ships
ASSETS – DRILL SHIPSASSETS – DRILL SHIPS
Self-propelled, dynamically positioned - no mooring system or anchor handling required
Ultra-deep water depths (10,000-ft and beyond)
Very high deck load (carrying capacity)
Moderate Environment drilling and completions
Well-suited to exploration drilling programs, high deck load allows for operations in remote areas with limited re-supply
Hydrocarbon storage capabilities for extended well testing (on the larger ship classes)
ASSETS – OTHER RIG TYPESASSETS – OTHER RIG TYPES
Self-Erecting Tender Swamp Barge Platform Rig
Self-Erecting Tender – Monohull barge with heavylift crane for erecting the drilling package on each platform drilling location (W.D. Kent shown working offshore Sarawak, recently sold by Transocean)
Swamp Barge (Also called a Posted Barge) – for very shallow sheltered water locations, swamps and river deltas (Searex 6 shown working Niger River Delta)
Self-Contained Platform Rig – Has its own quarters, power generation, all erected on the platform, typically for platform development drilling (Cliffs Drilling 1 shown offshore Hianan, China – sold by Transocean)
JACKUP HAZARDSJACKUP HAZARDS
Severe Weather Jackup rigs are most vulnerable
when afloat and under tow Hurricane/Cyclone damage while
elevated
Punch-through Sudden failure of the soils while
preloading
Blowout
FLOATING VESSEL HAZARDSFLOATING VESSEL HAZARDS
Hurricane Damage Loss of station due to overload of
mooring system Grounding Topside wind damage
Loss of Buoyancy Collision Uncontrolled Flooding
Well Control (subsea blowout) Blowout can cause build-up of
sediment onboard, causing loss of stability
MAJOR TOPICSMAJOR TOPICS
Company OverviewCompany Overview Transocean Heritage and LegacyTransocean Heritage and Legacy AssetsAssets
Drilling Offshore WellsDrilling Offshore Wells Arrival on LocationArrival on Location Primary Drilling EquipmentPrimary Drilling Equipment Offshore Well ConstructionOffshore Well Construction Life OffshoreLife Offshore
The Transocean AdvantageThe Transocean Advantage What makes Transocean THE PREMIER What makes Transocean THE PREMIER
OFFSHORE DRILLEROFFSHORE DRILLER
RIG TRANSPORTRIG TRANSPORT
Wet Tow Historically the most common
method of moving a rig Common for field moves and
short transits Slow speed, usually less than
five knots
Dry Transport Expensive, but makes good
sense considering reduced transit time
Increasingly common for long transits
Speeds around eleven knots Limited availability of suitable
vessels
ARRIVAL ON LOCATION - JACKUPARRIVAL ON LOCATION - JACKUP
Positioning the Unit on LocationPositioning the Unit on Location Unit is towed to the location by one or
more tugs Legs are lowered as the unit
approaches the drilling coordinates Positioning Company (Racal, Theos)
used to position the rig exactly on coordinates
Legs engage the seafloor (pinning on location
Operator (client) approves the position Anchors are run (Platform Locations)
ARRIVAL ON LOCATION - JACKUPARRIVAL ON LOCATION - JACKUP
Preloading and JackingPreloading and Jacking Hull is elevated to zero air gap
(bottom of the hull at the water surface)
The legs penetrate as the soil beneath the can fails until there is sufficient soil strength to support the weight of the rig.
Preloading is the process of testing the foundation beneath the rig against predicted storm loads
Accomplished by adding ballast water to the weight of the hull to simulate the loads the legs would see during a storm encounter
As water ballast is loaded onboard, the legs sink further into the soil.
Full Preload is held for 6 hours to test foundation at final penetrations
ARRIVAL ON LOCATION - JACKUPARRIVAL ON LOCATION - JACKUP
Prepare for Drilling Operations The hull is elevated to
operating air gap The cantilever is unlashed
and skidded out over the well
Operations Commence
Trident 15 – Exploration Location
Roger Mowell – Platform LocationSimultaneous Operation, Platform Skid-off and Platform Load-Sharing with 2 Jackup MODUs
ARRIVING ON LOCATION – MOOREDARRIVING ON LOCATION – MOOREDDifferent Moorings for Different Water DepthsDifferent Moorings for Different Water Depths
ARRIVING ON LOCATION – MOOREDARRIVING ON LOCATION – MOOREDRunning AnchorsRunning Anchors
The rig passes a chaser pendant wire to the anchor handling boat.
Wire Chaser
J-Lock Chaser
ARRIVING ON LOCATION – MOOREDARRIVING ON LOCATION – MOOREDRunning AnchorsRunning Anchors
As the boat moves away from the rig to the anchor position, the rig pays out chain or wire. The anchor is suspended behind the boat
ARRIVING ON LOCATION – MOOREDARRIVING ON LOCATION – MOOREDRunning AnchorsRunning Anchors
The anchor handling tug lowers the anchor to the seafloor on a work wire. The rig hauls in chain or wire to set and tension the anchor.
15-tonne Vryhof Anchor
ARRIVING ON LOCATION – MOOREDARRIVING ON LOCATION – MOOREDRunning AnchorsRunning Anchors
The pendant and chaser are stripped back to the rig and passed back via rig crane.
Anchor Handling Tug/Supply Vessel
Correction signal
Reference Station
ARRIVING ON LOCATION – DP UnitsARRIVING ON LOCATION – DP UnitsPosition Reference – Staying on LocationPosition Reference – Staying on Location
Input: Environmental Loads and
DirectionSenses Wind Speed and
computes force to resist Acoustic Signal
Beacons placed on seafloor and monitored by hydrophones onboard
Satellite Positioning (DGPS)Multiple Satellites at same
time
Output: DP system allocates
thrusters to resist external force and maintain station
PRIMARY GROUPS OF PRIMARY GROUPS OF DRILLING EQUIPMENTDRILLING EQUIPMENT
HOISTINGHOISTING
ROTATINGROTATING
CIRCULATINGCIRCULATING
WELL CONTROL AND WELL CONTROL AND RISERSRISERS
TUBULAR HANDLINGTUBULAR HANDLING
POWER MANAGEMENTPOWER MANAGEMENT
DRILLING CONTROLSDRILLING CONTROLSDrilling ahead on the Discoverer Enterprise
HOISTING EQUIPMENTHOISTING EQUIPMENTThe Drilling DerrickThe Drilling Derrick
The predominant structure on the drilling rig, used for hoisting of heavy loads in and out of the hole...
Several Types: Conventional Derrick Drilling Mast Dual Activity Derrick Ram Rig Tri-Act Derrick
HOISTING EQUIPMENTHOISTING EQUIPMENTThe DrawworksThe Drawworks
The primary hoisting machine, located on the drill floor used to hoist loads into and out of the hole
Several Types: Conventional Electric Hoist Active Heave Compensating
Drawworks Power
varies from 2000 to 6000hp Hoisting from 500-tons to
1250-tons
National AHD1000 Active Heave Compensating Drawworks
Continental Emsco Electrohoist Drawworks
HOISTING EQUIPMENTHOISTING EQUIPMENT
Traveling Assembly Blocks
The sheave cluster around which the drill line is reeved to provide necessary lifting capacity
Drillstring Compensator Prevents vessel heave
(vertical) motions from being transmitted to the bottom of the drill string
Several types – In-line, which hangs from the blocks, and crown-mounted, positioned on top of the derrick
Hook Not all rigs have hooks, but
where fitted, the top drive bails are connected to the traveling assembly
Traveling Block
In-line Drill String Compensator
Hook
Crown-Mounted CompensatorPlay Oilwell Drilling Series Vol.5, “Motion Compensator”
HOISTING EQUIPMENTHOISTING EQUIPMENTCranes and Material HandlingCranes and Material Handling
• Cranes– Used extensively for moving
materials on, off and around the rig• Tubulars
• Risers
• General Handling
• Offloading Work Boats
• Air Tuggers– Used to move equipment, tools and
materials around the rig• Drill Floor
• Cellar Deck
• Moonpool area
• Manriding
ROTATING EQUIPMENTROTATING EQUIPMENTMaking the drillstring turn to the right…Making the drillstring turn to the right…
Rotary Table The rotary table turns the bit
and drill string while drilling Uses a bushing which turns a
square or hexagonal joint of pipe called a kelly which transmits torque into the bit
Today, the rotary is used primarily to orient drill string while drilling directionally with downhole motors
Top Drive System Rotates the drill string from
the top Allows drilling one a full stand
(3 joints) of pipe between connections
Keeps the rotating drive train above the floor
Rotary Drilling
Top Drive Drilling
DRILL STRINGDRILL STRING
Drill Bits Various designs for different
formations Fixed and rolling cutters Fluid jets from the bit and up
the annulus
Bottom Hole Assembly Drill collars are heavy, thick
wall drill pipe added above the bit to help set the weight of the bit on-bottom
Drill Pipe Most drilling operations are
conducted with drill pipe Delivers drilling fluid to the
bottom of the hole Landing strings help lower
casing and tubing to the sea floor
Play Oilwell Drilling Series Vol.1, “Drill Bits”
CIRCULATING SYSTEMCIRCULATING SYSTEM
Drilling Fluid (mud) is pumped down-hole by high pressure pumps
Fluid jets out of the bit and returns to the surface through the riser
Mud is conditioned: Shale shakers sift out the
large cuttings by running the returned fluid over vibrating screens
Degassers remove any small gas bubbles entrained in the fluid
Desanders, Desilters and Mud Cleaners remove the fine silts and cuttings from the fluid using hydrocyclones
Mud is returned to the active mud pits, to be pumped down-hole again
Circulating mud is used to:Circulating mud is used to:
Bring the cuttings generated by the bit to the Bring the cuttings generated by the bit to the surface,surface,
Keep the hole open while drilling to allow casing Keep the hole open while drilling to allow casing to be run and cemented in place, andto be run and cemented in place, and
Prevent loss of pressure control in the well.Prevent loss of pressure control in the well.
Play Oilwell Drilling Series Vol.4, “Overiew, Mud Systems”
CIRCULATING SYSTEMSCIRCULATING SYSTEMSMud PumpsMud Pumps
• 2200hp reciprocating slush pump:• 375GPM at 7500psi
• 960GPM at 3500psi
• Change out fluid end liners to modify flow rate
• Creates “pulses” in the fluid flow and pressure from reciprocating motion
• New Technology HEX Pump• No fluid pulse• No liner changes• Consistent flow rates and
pressures
MUD PROCESSING EQUIPMENTMUD PROCESSING EQUIPMENT
Photos courtesy Derrick Equipment Co.
Gumbo Conveyors Gumbo (sticky clay) can clog
mud systems and is removed before the shale shakers
Shale Shakers Separate large cuttings from
the drilling fluid with vibrating screens
Degassers Remove gas from the drilling
mud before returning to the active pits
Desanders and Desilters Remove smaller sediments
from the liquid mud
Mud Cleaners Combines the function of the
shaker, desander and desilter in one machine
WELL CONTROLWELL CONTROLBlowout PreventersBlowout Preventers
Surface Blowout Preventer Stack
13-5/8-inch, 10,000psi
Subsea Blowout Preventer Stack
18-3/4-inch, 15,000psi
Play Oilwell Drilling Series Vol.2, “Pressure Control”
WELL CONTROLWELL CONTROLChoke and Kill ManifoldChoke and Kill Manifold
Manage Gas and Fluids coming out of the well under high pressure
Choke – Orifice through which high pressure gas and fluids can be bled off the well under control
Kill – Ability to pump heavy fluid (pills) down the hole to suppress the high pressure gas/fluids in the wellbore
Blowout – What happens when pressure control is lost…
Skid-mounted, vertical choke and kill manifoldSkid-mounted, vertical choke and kill manifold
MARINE DRILLING RISERMARINE DRILLING RISERConnecting the Rotary to the Sea Floor…Connecting the Rotary to the Sea Floor…
Acts as a conduit for returning cuttings and mud to the surface
Drilling operations are conducted inside the riser pipe
Auxiliary lines for well control, mud boost and hydraulics for BOP controls
Flex joints at the top and bottom allow rotation of the riser
At the top, the riser is connected to the rig with a telescopic joint
Riser tensioners cancel out vesssel heave similar to drill string compensators
Many joints have foam buoyancy modules attached to reduce the in-water weight and reduce required tension
Slick Marine Drilling Riser Joint
Running a riser joint, using the gimbaled spider
Play Oilwell Drilling Series Vol.2, “Subsea BOPs”
TUBULAR HANDLINGTUBULAR HANDLINGPipe Handling EquipmentPipe Handling Equipment
Historically, pipe was manhandled into and out of the hole with a combination of air-powered tuggers and muscle…
Many rigs today are equipped with one (or more) automated pipe racking machines which minimize the need for human interference with the operation…
TUBULAR HANDLINGTUBULAR HANDLINGPipe Handling EquipmentPipe Handling Equipment
Drillpipe Tongs, Spinning and Torque Wrenches Manual drillpipe tongs
are used to make up or break out torque connections when running or retrieving pipe
The spinning wrench quickly threads or unthreads the connection
The combination tool (also called a Hawkjaw) can do both operations
Spinning Wrench
Combination WrenchDrillpipe Manual Tongs
Spinning Chain
TUBULAR HANDLINGTUBULAR HANDLINGPipe Handling EquipmentPipe Handling Equipment
Iron Roughneck Automates the spinning
and torque functions of making and breaking tubular connections
Travels in and out from the well center
Elevates to “sense” the height of the tool joint
CONTROLS AND INSTRUMENTATIONCONTROLS AND INSTRUMENTATIONMaking it go when you push the button…Making it go when you push the button…
• Engines, Generators and Thrusters• Drilling Systems• Well Control Systems
• Today’s control systems are highly sophisticated, computer controlled networks.
VICIS Drillers’ ChairVICIS Drillers’ Chair
Conventional Drillers ConsoleConventional Drillers Console
Dynamic Positioning Dynamic Positioning ConsoleConsole
BOP Control ConsoleBOP Control Console
POWER AND PROPULSIONPOWER AND PROPULSION
7,000HP Thrusters, Discoverer Enterprise
Power Generation is a crucial rig function
Propulsion/Stationkeeping Drilling equipment Hotel/Auxiliary Loads
Primary Components Diesel Generators Switchgear Transformers Variable Frequency Drives SCR Drives (DC Motors)
Power System redundancy is crucial to stationkeeping for DP vessels
Diesel GeneratorsDiesel Generators
WELL CONSTRUCTIONWELL CONSTRUCTION Typical Drilling/Casing Program
The conductor, or surface casing is typically jetted into the sea floor.
26-inch hole is drilled to pre-set depth.
20-inch casing is run and cemented in place. Wellhead is installed.
17-1/2-inch hole is drilled to pre-set depth.
13-3/8-inch casing is run (hangs from the wellhead) and cemented in place.
12-1/4-inch hole is drilled to preset depth.
9-5/8-inch casing is run and cemented in place.
8-1/2-inch hole section is drilled to pre-set depth
7-inch production liner (hangs at the bottom of the 9-5/8 casing is run.
Offshore Living - Basic, but Comfortable…Offshore Living - Basic, but Comfortable…
Offshore living standards have improved steadily.
Remote operations mean longer hitches
This is also home for half of every year.
Offshore Living - Basic, but Comfortable…
MAJOR TOPICSMAJOR TOPICS
Company OverviewCompany Overview Transocean Heritage and LegacyTransocean Heritage and Legacy AssetsAssets
Drilling Offshore WellsDrilling Offshore Wells Arrival on LocationArrival on Location Primary Drilling EquipmentPrimary Drilling Equipment Offshore Well ConstructionOffshore Well Construction Life OffshoreLife Offshore
The Transocean AdvantageThe Transocean Advantage Looking to the Future:Looking to the Future:
NEXT GENERATION TOP DRIVENEXT GENERATION TOP DRIVEModular Derrick Drilling MachineModular Derrick Drilling Machine
Project launch 2004 1250T lifting capacity 10-year life between major
overhauls Robust & Reliable, NPT target
< 0.1% No critical path shutdown …
maintenance while operating Modular design for quick
change-out of major components
Implemented on newbuilds
ARCTIC SOLUTIONSARCTIC SOLUTIONSDrilling in a Technically Demanding EnvironmentDrilling in a Technically Demanding Environment
Design Imperatives Extended Season Off-Season Marketability Operating Efficiency VDL for Multi-Well Campaign
Dual-Acting Hull DP and Turret Moored Deepwater capable in off-
season Dual Activity Operating Displacement 65k MT
DEEPWATER CONVERSIONSDEEPWATER CONVERSIONSBreathing New Life into Old Steel…Breathing New Life into Old Steel…
SEDCO 702 and 706 Vintage mid-1970s, 2nd Generation
Moored Floaters Water Depths up to 1500-ft
New Capabilities: Dynamically Positioned, ABS
DPS-2 Class 6500-ft Water Depth Moderate Environments Enhanced Variable Load Leading Edge Power Systems
Sedco 702 Before Conversion
NEWBUILD DRILLSHIPSNEWBUILD DRILLSHIPSClear Leader Class DP Drill ShipsClear Leader Class DP Drill Ships
Water Depth 12,000ft
Drilling Depth40,000ft
Length 837 ft
Beam 125 ft
Hull Depth 62 ft
Draft 43 ft
Disp 100,000 MT
VDL 20,000 MT
Dynamically Positioned
Dual Activity
Zero Discharge Facility
Crude Storage Capability
Discoverer Clear Leader under construction at DSME Shipyard, Okpo, South Korea
TRANSOCEANTRANSOCEANWe’re never out of our depth.We’re never out of our depth.
Questions and Comments…Questions and Comments…