DEA DEUTSCHE ERDOEL AG

CIRCLE GROUP WELL SERVICES AS

WELLTEC OILFIELD SERVICES (NORWAY) AS

REPSOL EXPLORACION S.A.

WELLTEC INC.

ODFJELL OFFSHORE LTD NUF

COSL INNOVATOR PTE LTD NUF

COSL PROMOTER PTE LTD NUF

PETRO WELL SERVICES AS

BOLLSTA DOLPHIN PTE LTD

KCA DEUTAG DRILLING NORGE AS

ISLAND DRILLING COMPANY AS

DOLPHIN DRILLING OPERATIONS AS

KMNOR AS

ODFJELL TECHNOLOGY AS

ARENDAL SPIRIT AS

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