Just a few years ago, when oil sold for about $100 a barrel, banks here were lining up to give international oil explorers access to billions of dollars to finance new drilling and projects. But as oil prices stay mired in a funk, the money is drying up. Senior executives from companies such as Tullow Oil TUWOY -2.91 % PLC and Cairn Energy CRNCY -1.03 % PLC have been meeting with their bankers for a biannual review of the loans that allow them to keep drilling and building out projects. For many European companies, it has been a nail-biting experience, as banks worry about the growing pile of debt taken on by oil companies with little or no profits. Several companies said they expect their ability to tap credit lines to be diminished after […]