0602 GMT - European oil companies continue to benefit from Strait of Hormuz disruption and refining margins at near record highs. Attacks on Russian refineries continue to put pressure on the international refining system, which is already operating at high utilization levels to offset Middle East disruption, Jefferies analysts say. The U.S. bank raises net income estimates for the companies by 5% after strong second-quarter results and higher Brent crude assumptions.