WDC Exploration & Wells has announced that Rob Ruck will assume the duties of company president, along with his chief executive officer duties. Ruck joined the company in February of this year.

 Joe Spedale, president since June 2006, has left the company to pursue other interests. 

 Headquartered in Woodland, Calif., WDC (www.wdcexploration.com) is the largest privately owned drilling company in the United States.