Drilling shares bask in recent hot streak By: MarketWatch November 12, 2010 at 14:09 PM EST The Philadelphia Oil Service Index rises 10% in a month, which leaves some investors feeling shares in this segment are overvalued. Read More >> Related Stocks: Baker Hughes Inc Diamond Offshore Drilling Exxon Mobil Halliburton Co Nabors Industries Natl Oilwell Varco Patterson-Uti Energy Schlumberger Ltd Standard & Poors 500 Totalenergies Se ADR Transocean Ltd