EX-8.1 3 exhibit81.htm EXHIBIT Exhibit 8.1


Exhibit 8.1
SIGNIFICANT SUBSIDIARIES

The table below lists the Company's significant subsidiaries as of December 31, 2013:

Name of company
Country of Incorporation
Principal activities
Percent owned
 
 
 
 
Drilling unit owning companies
 
 
 
 
 
 
 
Asia Offshore Rig 1 Ltd
Bermuda
Owner of AOD I
66.2%
Asia Offshore Rig 2 Ltd
Bermuda
Owner of AOD II
66.2%
Asia Offshore Rig 3 Ltd
Bermuda
Owner of AOD III
66.2%
Sevan Drilling Rig II Pte Ltd
Singapore
Owner of Sevan Brasil
50.1%
Sevan Drilling Rig VI Pte Ltd
Singapore
Owner of Sevan developer no. 4
50.1%
Sevan Drilling Pte Ltd
Singapore
Owner of Sevan Driller
50.1%
Sevan Drilling Rig V Pte Ltd
Singapore
Owner of Sevan Louisiana
50.1%
Seadrill T-15 Ltd
Bermuda
Owner of T-15
62.4%
Seadrill T-16 Ltd
Bermuda
Owner of T-16
62.4%
North Atlantic Alpha Ltd
Bermuda
Owner of West Alpha
74.2%
Seadrill China Operations Ltd
Bermuda
Owner of West Aquarius
88.7%
Seadrill Aquila Ltd
Bermuda
Owner of West Aquila
100.0%
Seadrill Ariel Ltd.
Liberia
Owner of West Ariel
100.0%
Seadrill Auriga Ltd
Bermuda
Owner of West Auriga
100.0%
Seadrill Callisto Ltd
Bermuda
Owner of West Calisto
100.0%
Seadrill Deepwater Drillship Ltd
Cayman Islands
Owner of West Capella
88.7%
Seabras Rig Holdco Kft
Hungary
Owner of West Capricorn
80.8%
Seadrill Carina Ltd
Bermuda
Owner of West Carina
100.0%
Seadrill Castor Ltd
Bermuda
Owner of West Castor
100.0%
Scorpion Courageous Ltd
Bermuda
Owner of West Courageous
100.0%
Seadrill Cressida Ltd
Bermuda
Owner of West Cressida
100.0%
Seadrill Defender Limited
Bermuda
Owner of West Defender
100.0%
Seadrill Dione Ltd
Bermuda
Owner of West Dione
100.0%
Seadrill Dorado Ltd
Bermuda
Owner of West Dorado
100.0%
Seadrill Draco Ltd
Bermuda
Owner of West Draco
100.0%
Seadrill Eclipse Ltd
Bermuda
Owner of West Eclipse
100.0%
North Atlantic Elara Ltd
Bermuda
Owner of West Elara
74.2%
Seadrill Eminence Ltd
Bermuda
Owner of West Eminence
100.0%
North Atlantic Epsilon Ltd
Bermuda
Owner of West Epsilon
74.2%
Seadrill Freedom Limited
Bermuda
Owner of West Freedom
100.0%
Seadrill Gemini Ltd
Bermuda
Owner of West Gemini
100.0%
Seadrill Hyperion Ltd
Bermuda
Owner of West Hyperion
100.0%
Seadrill Intrepid (S) Pte. Ltd
Singapore
Owner of West Intrepid
100.0%
Seadrill Jupiter Ltd.
Bermuda
Owner of West Jupiter
100.0%
Seadrill Indonesia Ltd
Bermuda
Owner of West Leda
100.0%
Seadrill Leo Ltd
Bermuda
Owner of West Leo
88.7%
Seadrill Libra Ltd
Bermuda
Owner of West Libra
100.0%
Seadrill Mimas Ltd
Bermuda
Owner of West Mimas
100.0%
Seadrill Mira Ltd
Bermuda
Owner of West Mira
100.0%
Scorpion Rigs Ltd
Bermuda
Owner of West Mischief
100.0%
North Atlantic Navigator Ltd
Bermuda
Owner of West Navigator
74.2%
Seadrill Neptun Ltd
Bermuda
Owner of West Neptun
100.0%
Seadrill Oberon Ltd
Bermuda
Owner of West Oberon
100.0%
Seadrill Orion Ltd
Bermuda
Owner of West Orion
100.0%




Seadrill Pegasus Pte Ltd
Singapore
Owner of West Pegasus
100.0%
North Atlantic Phoenix Ltd
Bermuda
Owner of West Phoenix
74.2%
Seadrill Prospero Ltd
Bermuda
Owner of West Prospero
100.0%
Seadrill Proteus Ltd
Bermuda
Owner of West Proteus
100.0%
Seadrill Resolute Ltd
Bermuda
Owner of West Resolute
100.0%
Seadrill Rhea Ltd
Bermuda
Owner of West Rhea
100.0%
North Atlantic Rigel Ltd
Bermuda
Owner of West Rigel
74.2%
Seadrill Saturn Ltd
Cyprus
Owner of West Saturn
100.0%
Seadrill Hungary Kft
Hungary
Owner of West Sirius
80.8%
Seadrill Telesto Ltd
Bermuda
Owner of West Telesto
100.0%
Seadrill Tellus Ltd
Bermuda
Owner of West Tellus
100.0%
Seadrill Tethys Ltd (Bermuda)
Bermuda
Owner of West Tethys
100.0%
Seadrill Titan Ltd (Bermuda)
Bermuda
Owner of West Titan
100.0%
Prospector Rig 3 Owning Company S.a.r.l.
Luxembourg
Owner of West Titania (previously Prospector 3)
100.0%
Seadrill Triton Ltd
Bermuda
Owner of West Triton
100.0%
Seadrill Tucana Ltd
Bermuda
Owner of West Tucana
100.0%
Seadrill Umbriel Ltd
Bermuda
Owner of West Umbriel
100.0%
Seadrill Vela Ltd
Bermuda
Owner of West Vela
100.0%
Seadrill Vencedor Ltd
Bermuda
Owner of West Vencedor
88.7%
North Atlantic Venture Ltd
Bermuda
Owner of West Venture
74.2%
Scorpion Vigilant Ltd
Bermuda
Owner of West Vigilant
100.0%
 
 
 
 
Drilling units under sale leaseback
 
 
 
 
 
 
 
SFL Deepwater Ltd*
Bermuda
Owner of West Taurus
—%
SFL Polaris Ltd*
Bermuda
Owner of West Polaris
—%
SFL Hercules Ltd*
Bermuda
Owner of West Hercules
—%
SFL Linus Ltd*
Bermuda
Owner of West Linus
—%
 
 
 
 
Contracting and management companies
 
 
 
 
 
 
 
North Atlantic Crew AS
Norway
Crewing Company
74.2%
North Atlantic Crewing Ltd (Bermuda)
Bermuda
Crewing Company
74.2%
North Atlantic Drilling UK Ltd
United Kingdom
Drilling services contractor
74.2%
North Atlantic Management AS
Norway
Management company
74.2%
North Atlantic Norway Ltd
Bermuda
Drilling services contractor
74.2%
North Atlantic Support Services Ltd
United Kingdom
Management company
74.2%
Sea Dragon de Mexico S. de R.L. de C.V.
Mexico
Management company
100.0%
Seadrill Americas Inc.
USA
Drilling services contractor and technical services company
100.0%
Seadrill Asia Ltd
Hong Kong
Drilling services contractor, holding company
100.0%
Seadrill Deepwater Contracting Ltd
Bermuda
Contracting company
100.0%
Seadrill Deepwater Crewing Ltd
Bermuda
Crewing company
100.0%
Seadrill Deepwater Units Pte Ltd.
Singapore
Management company
100.0%
Seadrill Insurance Ltd.
Bermuda
Insurance company
100.0%
Seadrill Management (S) Pte Ltd
Singapore
Management company
100.0%
Seadrill Management AME Ltd.
Bermuda
Management company
100.0%
Seadrill Management AS
Norway
Management company
100.0%
Seadrill Management Ltd.
United Kingdom
Management company
100.0%
Seadrill Management Services Ltd
British Virgin Islands
Management company
100.0%
Seadrill Offshore AS
Norway
Drilling services contractor
100.0%
Seadrill Offshore Singapore Pte Ltd
Singapore
Management company
100.0%




Seadrill Servicos de Petroleo Ltda.
Brazil
Drilling services contractor
100.0%
 
 
 
 
Holding Companies
 
 
 
 
 
 
 
North Atlantic Drilling Ltd
Bermuda
Holding Company of North Atlantic vessel owning entities
74.2%
Seadrill Common Holdings Ltd
Bermuda
Holding Company
100.0%
Seadrill Deepwater Holdings Ltd
Bermuda
Holding Company
100.0%
Seadrill Jack Up Holding Ltd
Bermuda
Holding Company
100.0%
Seadrill Member LLC
Marshall Islands
Holding Company
62.4%
Seadrill Partners LLC
United Kingdom
Holding Company
62.4%
Seadrill UK Ltd
United Kingdom
Holding Company
100.0%

* Fully consolidated Variable interest entities