Superior Energy Services increased its oilfield service business 50 percent from $735.3 million in 2005 to $1.1 billion in 2006 primarily because of increased equipment rentals as well as diversification, according to Superior’s vice president of investor relations Greg Rosenstein.

With rental tool expansion in the North Sea, West Africa and the Middle East, more international customers are using Superior’s oil field equipment, Rosenstein said. The company plans to continue to expand its rental tools division internationally.