Oil and gas drilling services contractor Helmerich & Payne Inc. (NYSE: HP) was crushed after oil prices tumbled in mid-2014. And for good reason, with its active U.S. land rig count falling a massive 70% in just six quarters. However, after hitting a bottom, things have started to turn around. Better yet, there appears to be another upgrade cycle taking shape that Helmerich & Payne is set to take advantage of, and that could make this drilling services company a buy -- but don't expect huge price gains from here.Helmerich & Payne's stock price fell more than 60% following the top in oil prices.