DEA DEUTSCHE ERDOEL AG

CIRCLE GROUP WELL SERVICES AS

WELLTEC OILFIELD SERVICES (NORWAY) AS

REPSOL EXPLORACION S.A.

WELLTEC INC.

ODFJELL OFFSHORE LTD

COSL INNOVATOR PTE LTD

COSL PROMOTER PTE LTD

NOBLE INVINCIBLE NORGE

PETRO WELL SERVICES AS

BOLLSTA DOLPHIN PTE LTD

KCA DEUTAG DRILLING NORGE AS

ISLAND DRILLING COMPANY AS

DNO NORTH SEA PLC NORWEGIAN BRANCH

DOLPHIN DRILLING OPERATIONS AS

KMNOR AS

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