7th-gen DSME 12000 Drillship Info/Jobs.
Built by Daewoo at Okpo Shipyard in South Korea, the drillship is designed to operate in water depths of up to 12,000 feet and drill wells to 40,000 feet.
Drillship features Transocean’s patented dual-activity drilling technology, industry-leading hoisting capacity, Transocean’s designed and patented Active Power Compensation hybrid system and a second blowout preventer (BOP). The drillship is upgradeable to accommodate a 20,000 psi BOP system.
Ship Name: Deepwater Thalassa; Owner: Transocean Ltd.; Manager: Transocean Offshore Deepwater Drilling Inc.; Rig Type: Drillship; Sub Type: Ultradeep Water; Structural design type: Monohull ship; Max Water Depth (ft): 10,000; Max Drill Depth (ft): 40,000; Dimensions (ft): 781 x 138 x 62; Competitive: Yes;
Current Location: Country: USA; Region: North America;
Rig Construction Details: Rig Design: DSME; Rig Model: 12000; Year Built: 2015; Country of Build: South Korea; Yard Name: Okpo Shipyard; Group Yard Name: Daewoo Shipbuilding & Marine Engineering (DSME);
Rig Contract Details: Operating Status: Operational; Operator: Shell;
Deepwater Thalassa is working on ten-year (3 516 days) contract for Shell’s Stones project in the US Gulf of Mexico, which is set to end in mid Feb 2026 at a dayrate of US$ 474 000.
The newbuild ultra-deepwater drillship Deepwater Thalassa on February 12, 2016,commenced operations on its 10-year contract in the U.S. Gulf of Mexico with Shell at a dayrate of $519,000. Transocean’s Deepwater Thalassa has commenced operations on its 10-year contract for Shell’s Stones project in the US Gulf of Mexico this month.
Stones is located 200mi southwest of New Orleans, Louisiana at about 9500ft water depth, with a reservoir depth of around 26,500ft below sea level. The field encompasses eight US Federal Outer Continental Shelf lease blocks in the Gulf of Mexico’s Lower Tertiary geologic trend. Shell has the newbuild ultra-deepwater drillship at a dayrate of US$519,000.
Production from the first phase of development includes two subsea production wells tied back to a FPSO host vessel, followed at a later phase by six additional wells with multiphase pumping.
According to Shell, the oil and gas development will host the deepest production facility in the world. Shell’s 100% owned and operated Stones project is estimated to have a peak production of 50,000 boe/d in the first phase of development, from more than 250 MMboe of recoverable resources. The Stones field has significant upside potential and is estimated to contain over 2 billion boe of oil in place.
Back in 2012, Shell hired Transocean’s four drillships Deepwater Proteus , Deepwater Pontus , Deepwater Poseidon and Deepwater Thalassa all ordered at DSME, for ten years each. One of these drillships, the Deepwater Thalassa, started its contract with Shell in the U.S. Gulf of Mexico in February 2016.
All four drillships have been designed to operate in water depths of up to 12,000 feet and drill wells to 40,000 feet.
Ship Name: Deepwater Thalassa
Ultra-Deepwater Dual-Activity Drillship
General Description
Design / Generation DSME 12000 Ultra Deepwater Drillship
Constructing Shipyard DSME
Year Entered Service / Significant Upgrades 2016
Classification DNV 1A1, “Ship Shaped Drilling Unit”, E0,
DYNPOS-AUTRO, DRILL, CRANE, HELDK
Flag Marshall Islands
Dimensions 781 ft. LOA x 138 ft. beam x 62 ft. depth
Drafts 39 ft. operating / 29 ft. transit
Accommodation 200 persons
Displacement 114,608 st operating
Variable Deck 25,346 st operating / 20,938 st transit
Transit Speed up to 12.5 knots
Maximum Water Depth 12,000 ft designed / 10,000 ft outfitted
Maximum Drilling Depth 40,000 ft
Drilling Equipment
Derrick Dual dynamic derrick 210-ft clear internal working height with
78-ft x 46-ft base
Hookload Capacity (Main & Aux) 2,800,000 lbs. static hook load. (4,000,000 lbs.
combined)
Drawworks Two (2) (Main & Aux) NOV AHD-1400 active heave
compensated drawworks, 10,500 hp each with seven (7) x
1500 hp GE 690 VAC motors
Both drawworks rated at 1,400-st (blocks reeved for 16 lines)
with 2-1/8 inch OD lines
Compensator (Main & Aux) Active Heave Compensation in drawworks.
Rotary Table (Main & Aux) NOV RST-755 75-1/2 inch hydraulic rated at
1,250 st; 45,000 ft.-lbs. maximum continuous torque
Top Drive (Main & Aux) NOV TDX-1250 electric rated to 1,250 st. with a
continuous torque output of 105,000 ft.-lbs. (at 130 rpm) and
two (2) x 1,340 hp. AC motors
Tubular Handling Two (2) NOV ST-160 Iron Roughnecks for tubulars ranging
from 3-1/2 inch to 10 inch. Racking systems for a tubular
range of 4-1/2 inch to 14 inch with two (2) vertical pipe racking
systems
Riser Feed One (1) Riser Catwalk Machine, maximum capacity 45 mt and
90 ft. riser joint
Mud Pumps Four (4) NOV 14-P-220 AC triplex pumps, each driven by two (2) x
GE 1,100 hp 690VAC motors plus space for a fifth optional pump
HP Mud System Rated for 7,500 psi
Solids Control Six (6) Brandt Single VSM-MS triple deck shale shakers
Power & Machinery
Main Power Six (6) Hyundai HiMSEN 4-stroke 720 rpm diesel engines,
each driving a 6,750 kw x 11KVAC generator
Emergency Power One (1) 4-stroke 1,800 rpm diesel engine rated at 1,700 kW
driving a 690 VAC generator
Power Distribution Three (3) Siemens 11KV AC switchboards with AGP
(Advanced Generator Protection)
DC drilling drives include stored energy capability (Hybrid
Power System)
Storage Capacities
Fuel- Oil 50,318 bbl
Liquid Mud- 8,859 bbl Active / 10,556 bbl reserve
Base Oil- 5,346 bbl
Brine- 10,064 bbl
Drill Water- 18,870 bbl
Potable Water- 8,177 bbl
Bulk Material- (mud + cement) 30,017 cu.ft.
Sack Storage- 10,000 sacks
BOP & Subsea Equipment
BOP- Two (2) x seven (7) ram 18-3/4 inch x 15,000 psi BOP’s
consisting of two (2) Cameron TL doubles and one (1)
Cameron TL triple Separate test control system for the second
BOP while the primary BOP is deployed
LMRP- Two (2) LMRP’s, each including one (1) Cameron Dual DL 18-
3/4 inch 10,000 psi annular preventer
BOP Handling- NOV BOP Moonpool Trolley rated at 600 mt with two (2) x 300
mt overhead service hoists and two (2) x15 mt service hoists
Marine Riser- Cameron Load King Riser 75 ft. x 21 inch OD, with H class
connectors and 4.5 inch ID 15,000 psi choke and kill lines
Tensioners- 4,000 kips combined capacity using eight (8) NOV DWRT-250
dual riser tensioners rated at 250 kips each tensioner with a
maximum effective 50 ft. stroke
Diverter- Cameron 21 inch x 500 psi with two (2) 16 inch flow lines
Tree Handling- One (1) 350 mt Xmas tree trolley and two (2) 150 mt skid cart
Moonpool- 82 ft. length x 31 ft. width
Station Keeping / Propulsion System
Thrusters- Six (6) right angle geared thrusters, three forward and three
aft, each rated at 5,500 kw, variable speed, fixed pitch, fully
azimuthing, and underwater demountable type with advanced
thruster capabilities (ADCAP)
DP System- DP3, Kongsberg Maritime K-Pos 3 (triple redundant) with
backup DP system
Cranes
Cranes- Three (3) 100 mt knuckle boom cranes rated at 25 mt. at a
radius of 45 meters
AHC Subsea Crane- One (1) 165 mt active heave compensated knuckle boom
crane for handling 84.3 mt subsea equipment to 12,000 ft WD
Other Information
Helideck- Rated for Sikorsky S-61N & S-92 helicopters
Emissions- IMO tier III with SCR exhaust treatment and using low sulphur
Revision Date: 06 February 2017 or ULSD diesel fuel (MGO)
These specifications are intended for general reference purposes only, as actual equipment and specifications may vary based upon subsequent changes, the contract situation and customer needs.
Drillship Status Updated: Transocean FSR April 17, 2019
Rig Type/Name: Deepwater Thalassa; Footnote References: (6); Floater Type: ship; Dynamically Positioned: DP; Yr. Entered Service: 2016; Water Depth (Feet): 12,000; Drilling Depth (Feet): 40,000;
1) Location: US GoM; Customer: Shell; Estimated Contract Start Date: Jul-2016; Estimated Expiration Date: Feb-2026; Dayrate on Current Contract (Dollars): 4 74,000; Dayrate on Previous Contract (Dollars): N/A; Comments: ----;
Footnotes: (6) If the dayrate is disclosed, reflects the current contracted dayrate which could reflect prior cost escalations, or de-escalations, and could change in the future due to further cost escalations, or de-escalations.
Vessel Name: Deepwater Thalassa
Owner: Transocean
Rig manager: Transocean
Type: Drillship
Design category: Drillship 7th gen
Full design name: DSME 12000
IMO: 9675169
Class: DNV GL
Constructed at: DSME
Year in SVC: 2016
Latest upgrade: ----
Competitive: Yes
SPS due date: 09.09.2020
Contract status:
Status: Drilling
Operator: Shell
Country: USA
Region: US GoM
Day rate: 474000
Next available: 16.02.2026
Available until: ----
Backlog: 1141866000
Value: Value ($m): 301-332
Contract detail:
Country: USA
Day rate: 474 000
Start date: 01.07.2016
End date: 15.02.2026
Operator: Shell
Location: ----
Number of wells: ----
Variable rate: No
Water depth: ----
Work type: None type
Duration (days): 3 516
Comment: Previous dayrate $488,000; reduced to $474,000 ...
Vessel Name: Deepwater Thalassa
Vessel Type: Drillship
IMO: 9675169
MMSI: 538005123
Call Sign: V7BE2
Flag: Marshall Is [MH]
Port: MAJURO
Gross Tonnage: 70095
Deadweight: 62449 t
Length Overall x Breadth Extreme: 238m × 42.04m
Year Built: 2015
Status: Active
• Voyage Info:
KR OKP [OKPO (KR)]: ATD : 2015-09-05 15:03 LT (UTC +9)---------->---------->---------->DRILLING 2 NM CPA: ETA: 2020-11-14 00:00 LT
Draught: 11 m
Reported Destination: DRILLING 2 NM CPA
Speed recorded (Max / Average): 7 knots / 6.3 knots
Reported Destination and ETA Received 2021-01-03 22:43 UTC
• Position:
Position Received: 2021-01-02 03:50 UTC
Vessel is Out-of-Range
Area: USG - Gulf of Mexico
Current Port: -
Latitude / Longitude: 26.13083° / -94.80341°
Status: Restricted Manoeuvrability
Speed/Course: 0 kn / 247 °
AIS Source: 5861
Ex Names History:
Vessel Name: DEDW6 DF 0,
Flag: MH,
Last Reported: 2018-10-21 12:58:00
Vessel Name: DEEPWATER THALASSA
Registered Owner: Triton Asset Leasing GmbH
Year: 2015
