ReutersSchlumberger, Baker Hughes warn of weak fourth quarterReuters(Reuters) - The world's top two oilfield services firms warned on Friday of a challenging fourth quarter for the industry, as investment slows due to soft oil prices and energy firms reducing activity on offshore rigs. FILE PHOTO: The exterior of the ...Schlumberger Helps Out HalliburtonBloombergSchlumberger Posts Strong Earnings, Warns of Waning North American ActivityTheStreet.comSchlumberger edges higher after in-line quarterSeeking AlphaStreetInsider.comall 12 news articles »