UPDATE 1-Hess seeks over $40 mln from Schlumberger in valve dispute
July 27, 2016 at 16:00 PM EDT
HOUSTON, July 27 (Reuters) - Hess Corp said on Wednesday it was pursuing legal action against Schlumberger NV for $40 million or more, claiming the oilfield service provider supplied a defective valve for a U.S. Gulf of Mexico oilfield that shuttered three wells and crimped production.