Related by context. Frequent words. (Click for all words.) 68 Exterran Holdings 62 Exterran Partners 61 Parallel Petroleum 60 Crimson Exploration 59 Allis Chalmers Energy 58 Ferrellgas Partners LP 58 Quicksilver Gas Services 57 Martin Midstream Partners 57 Legacy Reserves 56 Hiland Partners LP 55 Atlas Pipeline Partners 55 Atlas Pipeline 55 GeoResources Inc. 55 Harvest Natural Resources 55 Whiting Petroleum Corporation 54 Targa Resources Partners LP 54 Crosstex Energy 54 Inergy LP 54 Bronco Drilling 54 Targa Resources Partners 54 QEP Resources 54 Vanguard Natural Resources 53 Comstock Resources 53 GeoResources 53 Enogex 53 Transfer Equity 53 NuStar GP Holdings 53 Newfield Exploration Company 53 Magellan Midstream Partners 53 EXCO Resources Inc. 52 MarkWest Energy Partners 52 PetroQuest 52 EVEP 51 Grant Prideco 51 CVR Energy 51 Cheniere Energy 51 Petrohawk 51 MMLP 51 Rosetta Resources 51 MarkWest 51 Callon Petroleum Company 51 Encore Acquisition Company 51 Copano Energy 51 Copano Energy LLC 51 BancTrust 51 BreitBurn 51 Atlas Pipeline Holdings 51 DCP Midstream Partners LP 50 Valero LP 50 EnerJex 50 TODCO 50 National Oilwell 50 Quest Resource 50 Sunoco Logistics 50 Boardwalk Pipeline Partners LP 50 Buckeye GP 50 Concho Resources Inc. 50 Whiting Petroleum 50 MGE Energy 50 Approach Resources 50 RRI Energy 50 Schlumberger Limited 50 Petrohawk Energy Corporation 50 Trico Marine Services 50 Magellan Midstream Partners LP 49 MarkWest Energy Partners LP 49 Cimarex Energy 49 Crosstex Energy LP 49 Gasco Energy 49 Magnum Hunter 49 Ensco International 49 Sunoco Logistics Partners LP 49 Kohlberg Capital 49 Teekay Offshore 49 NOVA Chemicals 49 Brigham Exploration 49 OGE Energy Corp. 49 Transfer Partners LP 49 UIL Holdings 49 Cano Petroleum 49 Inergy 49 Williams NYSE WMB 49 National Oilwell Varco 49 ONEOK Partners LP 48 NuStar Energy 48 ExpressJet Holdings Inc. 48 Pipeline LP 48 Resource Partners LP 48 EnerVest 48 IESI BFC Ltd. 48 AmeriGas Partners LP 48 Nabors Industries Ltd. 48 OGE Energy 48 Cimarex Energy Co. 48 Sterling Bancshares 48 Cimarex 48 SGLP 48 Targa Resources 48 TC PipeLines LP 48 ENSCO International 48 Cleco Power