London-based Ensco International (ESV), a contract oil driller, has made good use of the time offered by the market correction. Ensco supplies equipment -- including expensive rigs for offshore operations -- workers and expertise. The customer could be anyone with a major underwater oil property. When Ensco reports its Q3 Thursday morning, the market expects earnings per share of $1.30, 41% more than a year ago. That would follow gains of 16%, 127%