Singapore’s Keppel Shipyard, the wholly-owned subsidiary of Keppel Offshore & Marine Limited, has secured the conversion of two shuttle oil tankers for Teekay Navion Shuttle Tankers (TNST), a wholly-owned subsidiary of Teekay Shipping of Canada. Nordic Rio and Nordic Brasilia are both newbuildings completed in Korea earlier this year. Nordic Rio arrived at Keppel Shipyard…