JPMorgan upgrades Schlumberger, says rising oil prices can boost stock by more than 20%

A oil rigger at the Schlumberger field prepares pipes in Midland, Texas on December 16, 2008.
Kirk McKoy | Los Angeles Times | Getty Images

Oilfield services stock Schlumberger has major upside as oil prices appear likely to remain elevated for the next few years, according to JPMorgan.