BRIEF-National Oilwell Varco reports Q2 loss per share $0.20
National Oilwell Varco Inc(NOV). * National Oilwell Varco(NOV) reports second quarter 2017 results. * Q2 loss per share $0.14 excluding items. * Q2 loss per share $0.20. * Q2 revenue $1.76 billion versus I/B/E/S view $1.78 billion. * Q2 earnings per share view $-0.15 -- Thomson Reuters I/B/E/S. * Qtrly rig systems generated revenues of $346 million, a decrease of 39 percent from q2 of 2016.