Under the deal with American Eagle Tanker Inc. Ltd. of Malaysia, Daewoo Shipbuilding will deliver the vessels by October 2013, the company said in a statement.
So far this year, Daewoo Shipbuilding has won orders valued at $3.9 billion to build ships and offshore facilities, raising the total order backlog to about $35 billion.
The shipbuilder is targeting $6 billion worth of orders this year.
Shares of Daewoo Shipbuilding closed at 19,400 won on the Seoul bourse, up 1.04 per cent from Monday's close.