A tugboat sent to rescue an oil tanker drifting off Bermuda should reach the ship by Friday night, BP Amoco said. "The boat is expected to keep clear of land and shipping lanes until the tugboat arrives," said a BP spokesman, adding the tug was due Friday around 9:00 p.m. local time (8:00 p.m. EST/Saturday 0100 GMT). The tanker, the British Valour, which had been Texas-bound with 300,000 tons (2.2 million barrels) of crude oil, has been floating at the mercy of the winds after an engine explosion Sunday. "Ship and crew are doing well. There have been no injuries and no oil spill," the spokesman said. The rescue by Delaware tugboat, Powhatan…