Attached files
Exhibit 21
TESCO CORPORATION SUBSIDIARIES
As of February 25, 2011
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2TD
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UK
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Altesco Drilling Technology EURL
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Algeria
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Casing Drilling Holdings Ltd.
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Barbados
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Casing Drilling International Ltd.
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Barbados
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Drilling Innovation de Mexico, SA de CV
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Mexico
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Drilling Innovation M.E. Ltd.
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Cyprus
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OCSET (Beijing) Trading Co. Ltd.
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PRC (China)
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OCSET, LLC
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Russian Federation
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Personal Tecnico Para Servicios Petroleros SA de CV
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Mexico
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PT. Tesco Indonesia
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Indonesia
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TDT (Beijing) Commerce Co. Ltd.
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PRC (China)
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Tesco Argentina S.A.
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Argentina
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Tesco Canada International (Middle East) FZE
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UAE
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Tesco Canada International (Middle East) FZE—Qatar Branch
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Qatar
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Tesco Canada International Inc.
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CAN - Alberta
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Tesco Colombia S.A.
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Panama
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Tesco Colombia S.A. – Sucursal Colombia
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Colombia
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Tesco Corporation—US Branch
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US - Texas
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Tesco Corporation (Norway) AS
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Norway
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Tesco Corporation (UK) Limited
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UK
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Tesco Corporation (US)
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US - Delaware
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Tesco Corporation Sucursal Argentina
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Argentina
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Tesco Corporation Sucursal Ecuador
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Ecuador
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Tesco Corporation Sucursal Mexico
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Mexico
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Tesco Corporation Sucursal Peru
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Peru
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Tesco Corporation Sucursal Venezuela
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Venezuela
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Tesco de Bolivia S.R.L.
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Bolivia
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Tesco do Brasil Servicios Petroleo
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Brazil
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TESCODRILLING Ecuador S.A.
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Ecuador
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Tesco Drilling Australia Pty Limited
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Australia
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Tesco Drilling LLC
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Oman
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Tesco Drilling Technology Inc.
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CAN - Alberta
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Tesco Drilling Technology Limited
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CAN - Alberta
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Tesco Drilling Venezuela, CA
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Venezuela
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Tesco Latin America Limited
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Barbados
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Tesco Offshore Services Inc.
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US - Nevada
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Tesco Peru S.A.
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Peru
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Tesco Products Ltd.
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CAN - Alberta
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Tesco R.F. Company Limited
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Cyprus
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Tesco R.F. Company Limited—Russia Branch
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Russian Federation
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Tesco Saudi Arabia Ltd. (LLC)
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Saudi Arabia
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Tesco Saudi Holding Limited
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Cyprus
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Tesco Services International Inc.
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CAN - Alberta
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Tesco Singapore PTE. Ltd.
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Singapore
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Tesco Singapore PTE Ltd – Brunei Branch
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Brunei
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Tesco Singapore PTE Ltd – India Project Office
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India
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Tesco Singapore PTE Ltd – NZ Branch
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New Zealand
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Tesco Singapore PTE Ltd. – PNG Branch
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Papua New Guinea
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Tesco US Holding LP
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US - Nevada
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