Related by context. Frequent words. (Click for all words.) 47 Petrohawk 45 Clean Harbors 45 Denbury 45 Flowserve 45 Kerr McGee 43 Pengrowth 41 SandRidge 40 Venoco 39 Tronox 39 Toreador 39 Ventana 39 Ensco 38 McMoRan 38 Celanese 38 Occidental 38 PXP 38 Grey Wolf 37 ChevronTexaco 37 National Oilwell Varco 37 Chevron 37 Tesoro 36 XTO 36 Chemtura 36 Inergy 36 Tenneco 36 PTTEP 36 Willbros 35 FMC Technologies 35 EOG 35 EnCana 35 QIAGEN 35 Texaco 35 Lithia 35 Montara 34 Double Eagle 34 EXCO 34 Schlumberger 34 Talisman 34 NiSource 34 Diamond Offshore Drilling 34 Aurizon 34 Tullow 34 oilfield 34 Beckman Coulter 34 Ligand 33 Encana 33 Biosite 33 NovaGold 33 SemGroup 33 CV Therapeutics 33 Lyondell 33 Gen Probe 33 Conoco 33 Emulex 33 Centex 33 Anadarko 33 Calpine 32 XTO Energy 32 boe 32 ONEOK 32 Unocal 32 Couche Tard 32 Kinder Morgan 32 Western Refining 32 Oxy 32 Clarient 32 Fluor 31 Chaparral 31 Airgas 31 San Ramon 31 Caltex 31 Medicis 31 Glamis 31 Oil Sands 31 Statoil 31 Newfield 31 Palomar 31 Inamed 31 QLT 31 BP 31 Nexen 31 Suncor 31 Thermo Fisher 31 Pharmion 31 Valero 31 Valeant 31 Alnylam 31 Cabot Oil 31 Dorado 30 Coeur 30 Ecopetrol 30 Lundin Mining 30 Pemex 30 Portola 30 Placer Dome 30 Chesapeake Energy 30 Cairn 30 Angiotech 30 Range Resources 30 Shell 30 Moraga