Related by context. Frequent words. (Click for all words.) 52 Exco Resources 51 Grey Wolf 49 Precision Drilling Trust 46 Newfield Exploration Co. 45 Whiting Petroleum 45 Harvest Natural Resources 44 Precision Drilling 44 FMC Technologies Inc. 44 Bois d' Arc 44 Oceaneering International 44 Newfield Exploration 43 PrimeWest Energy 43 GlobalSantaFe Corp. 43 Cimarex Energy Co. 43 Allis Chalmers Energy 43 Tetra Technologies 43 Anadarko Petroleum APC 43 driller 43 oilfield 42 Cal Dive International 42 EOG Resources Inc. 42 Nexen 42 National Oilwell 42 Magnum Hunter Resources 41 Crimson Exploration 41 Baytex Energy Trust 41 ENSCO International 41 TSX HSE 41 Talisman Energy 41 Enterra Energy 41 Atwood Oceanics 40 Comstock Resources 40 VAALCO Energy 40 Quicksilver Resources 40 Cimarex Energy 40 Vanguard Natural Resources 40 Patterson UTI Energy 40 Grant Prideco 40 Pioneer Natural Resources 40 Exxon Mobil Corp XOM.N 39 Newfield Exploration Company 39 Schlumberger Ltd 39 Tristone Capital 39 Oilfield Services 39 Carrizo Oil & 39 Denbury Resources 39 Husky Energy 39 Schlumberger SLB 39 EnCana 39 Hydril 39 Petrohawk Energy 38 Encana Corp. 38 Nabors Industries Ltd. 38 Rosetta Resources 38 Ensco International 38 Hercules Offshore Inc. 38 TSX TCK.B 38 Enerplus Resources Fund 38 Brigham Exploration 38 National Oilwell Varco 38 Petrocan 38 Oil Sands 38 XTO 37 Diamond Offshore Drilling 37 Approach Resources 37 West Timmins Mining 37 XTO Energy 37 Encana 37 Patterson UTI 37 Baker Hughes BHI 37 Parallel Petroleum 37 Chevron Corp 37 Cnooc Ltd. China 37 Newpark Resources Inc. 37 offshore drilling contractor 36 wellsite 36 Petro Canada 36 NFX 36 First Calgary Petroleums 36 Schlumberger 36 BPZ Energy 36 Hercules Offshore 36 Nitro Petroleum 36 Bema Gold 36 Sterling Bancshares 36 Royale Energy 36 Schlumberger NYSE SLB 36 Questar Corp. 36 Ocean Rig 36 Duran Ventures 36 ElkCorp 36 Cenovus Energy Inc. 36 Tullow Oil Plc 36 Copano Energy LLC 36 Premcor 36 Dril Quip 36 Layne Christensen 36 PetroKazakhstan 35 Bankers Petroleum 35 Pacific Rubiales Energy 35 Cenovus Energy