CHICAGO — National Oilwell Varco Inc. (NOV) has named former executive vice president and chief financial officer Clay Williams as the company’s new president and chief operating officer.

Jeremy Thigpen, NOV’s president of downhole pumping and solutions, will assume the roles of senior vice president and chief financial officer, the Houston-based oilfield services firm said Thursday.

"These changes bring together an outstanding group of seasoned leaders with a broad range of talents and abilities and a proven history of delivering results," NOV chairman and chief executive officer Peter Miller said in a statement.