Related by context. Frequent words. (Click for all words.) 63 MarkWest 62 Trican 61 PetroQuest 61 Petrosearch 60 Calfrac 59 EnerJex 59 DCP Midstream Partners 59 Newfield Exploration Company 58 CanElson 58 ProspEx 58 Enseco 58 Allis Chalmers Energy 58 Crimson Exploration 58 TransMontaigne Partners LP 58 Legacy Reserves 58 BBEP 58 National Oilwell 58 Grant Prideco 58 Cequence 57 Petro Andina 57 GeoResources Inc. 57 Exterran 57 QRCP 57 Cal Dive 57 MarkWest Energy Partners 57 EXCO Resources Inc. 57 Gasco Energy 57 ShawCor 57 DRAXIS 57 Culane 56 ProSep 56 Vantage Drilling Company 56 Magnum Hunter Resources 56 Norex 56 WestFire 56 Callon Petroleum Company 56 Enerflex 56 Flotek 56 Tetra Technologies 56 Targa Resources Partners LP 56 QEP Resources 56 CVR Energy 56 Exco Resources 56 Enogex 56 NGAS 56 Magnum Hunter 56 Quadra FNX 56 Marsulex 56 Brigham Exploration 55 Trans Orient 55 Toromont 55 Whiting Petroleum Corporation 55 Royale Energy 55 Abraxas Petroleum 55 Toromont Industries Ltd. 55 Teekay LNG 55 NuLoch 55 Exterran Holdings 55 Petrohawk 55 Petroflow 54 Exterran Partners 54 PetroBakken 54 Sunoco Logistics 54 GMX Resources Inc. 54 Exterran Holdings Inc. 54 Copano Energy LLC 54 NYSE RRC 54 Grande Cache Coal 54 Gastar Exploration 54 Parallel Petroleum 54 Cimarex Energy 54 Flotek Industries Inc. 54 InfuSystem 54 theCompany 54 EVEP 54 Contango Oil & 53 Innergex 53 OPTI 53 OGE Energy 53 Xtreme Coil 53 Biotel 53 Petrofund 53 Atlas Pipeline 53 TODCO 53 Geokinetics 53 Comstock Resources 53 BPZ Energy 53 TXCO 53 Questerre 53 Copano Energy 53 Gran Tierra 53 Canacol 53 Inergy Holdings LP 53 Cimarex 53 Energen Resources 53 Canetic 53 Targa Resources Partners 53 Precision Drilling Trust 53 Cimarex Energy Co. 53 Newalta 53 Whiting Petroleum