ExxonMobil Extends Contract for Leiv Eiriksson

Ocean Rig has executed an agreement with Esso Exploration Angola (Block 33) Limited, an affiliate of ExxonMobil Corporation, to extend its current contract for the Leiv Eiriksson with one additional well. The firm portion of the drilling contract is thus increased from five to six wells. This additional well will be drilled offshore Angola for Cabinda Gulf Oil Company (an affiliate to ChevronTexaco Corp.). It is estimated that the gross revenue for the well will amount to about US $5.4 million.