Global Marine today announced it received a letter of commitment from Elf Petroleum Nigeria Limited, a subsidiary of TotalFinaElf, for two-year contracts for both the Glomar Adriatic I and Glomar Baltic I jackup rigs to work on the Amenam/Kpono field offshore Nigeria. Producing Nigeria Unlimited operates this field development project. The contracts for the two units include key rig upgrades, which are anticipated to cost about $23 million in total. The two contracts are expected to generate combined revenues of approximately $121 million to Global Marine. for extension of up to one year. four operating offshore Nigeria," Marion Woolie, president of Global Marine Drilling Company, said. 410 feet of leg.