Auto-Dril filing alleges patent infringement

摘要

Auto-Dril has filed a claim in a Texas court against National Oilwell Varco and five other drillers for alleged infringement ofits US Patent No.6,994,172 for a well drilling control system. Auto-Dril claims that, inter alia, NOV's e-Wildcat electronic autodrilling system nfnnges on the patent and has 'actively Promoted' sales and use by third parties of its automatic drilling control systems.