Related by context. Frequent words. (Click for all words.) 56 PXP 56 Tesoro 53 Petrohawk 52 Magnum Hunter 52 Ultra Petroleum 51 SandRidge 50 Western Refining 49 XTO Energy 49 XTO 49 Tesoro Corp. 48 Kinder Morgan 48 Plains Exploration 48 Calpine 48 Occidental 48 Denbury 48 EnCana 47 Pengrowth 47 Kerr McGee 47 Ensco 47 Ivanhoe Energy 46 Valero 46 Pemex 46 InterOil 46 Grey Wolf 46 EOG Resources 45 ConocoPhillips 45 EOG 45 Chesapeake Energy 45 Anadarko 45 ChevronTexaco 45 Occidental Petroleum 44 Alon USA 44 Chevron 44 Cabot Oil 44 XTO Energy Inc. 44 Quicksilver Resources 44 PNM Resources 44 Encana 44 National Oilwell Varco 43 Carpinteria 43 Anadarko Petroleum Corp. 43 YPF 43 Questar 42 ConocoPhillips COP 42 Suncor 42 Howard Weil 42 drilling rigs 42 Mariner Energy 42 Geokinetics 42 Valero Energy 42 Unocal 42 Pioneer Natural Resources 42 Genoil 42 Energen 42 Diamond Offshore Drilling 42 Waste Connections 42 PEMEX 42 Ecopetrol 42 Enerplus 41 Dynegy 41 Nexen 41 Exxon Mobil 41 Kinder Morgan Energy 41 Statoil 41 Goodrich Petroleum 41 Methanex 41 McMoRan 41 Contango 41 Dejour 41 ONEOK Partners 41 EXCO 41 Sempra 41 AltaGas 40 FMC Technologies 40 El Paso Pipeline 40 Pacific Ethanol 40 Cenovus 40 Occidental Petroleum Corp. 40 ONEOK 40 Granite Construction 40 QGC 40 StatoilHydro 40 Lyondell 40 EnCana Corp. 40 Macerich 40 TECO Energy 40 PDVSA 40 natural gas 40 Anadarko Petroleum 40 Gran Tierra Energy 40 Piceance Basin 40 Spectra Energy 40 CNX Gas 40 SemGroup 39 Conoco 39 MasTec 39 EOG Resources Inc. 39 Chevron Corp. 39 Double Eagle 39 Salazar 39 Allis Chalmers