Related by context. Frequent words. (Click for all words.) 58 ENSCO International 57 Dril Quip 57 Insituform Technologies Inc. 56 FMC Technologies Inc. 56 Newfield Exploration Company 56 McMoRan Exploration Co. 55 Allis Chalmers Energy 55 Ensco International 54 FreightCar America Inc. 54 Flotek Industries Inc. 54 NYSE FTI 54 Crimson Exploration 54 Westlake Chemical 53 Cal Dive International 53 Flowserve Corp. 53 Baker Hughes BHI 53 NYSE SLB 53 Whiting Petroleum 53 NYSE NOV 53 NYSE RIG 52 Callon Petroleum Company 52 NYSE RDC 52 Hercules Offshore Inc. 52 Harvest Natural Resources 52 Diamond Offshore Drilling 52 NYSE URS 52 NYSE RRC 52 Atwood Oceanics 52 GeoResources Inc. 52 Oceaneering International 52 NYSE FLS 51 Koppers Holdings Inc. 51 CIRCOR International 51 Approach Resources 51 Beacon Roofing Supply 51 National Oilwell Varco 51 Gasco Energy 51 NYSE TSO 51 Grant Prideco 51 Trico Marine Services 50 NATCO Group 50 Harsco Corporation 50 Nabors Industries Ltd. 50 Polypore International 50 EMCOR Group 50 Hercules Offshore 50 Ameron International 50 Halliburton HAL 49 EXCO Resources Inc. 49 Comstock Resources 49 Cimarex Energy 49 Genuine Parts Company 49 Furmanite 49 Greenbrier Companies 49 Occidental Petroleum Corporation 49 AMN Healthcare Services 49 Parallel Petroleum 49 Island Fabrication 48 BIOLASE Technology Inc. 48 offshore drilling contractor 48 PetroQuest 48 Schlumberger NYSE SLB 48 Whiting Petroleum Corporation 48 Sauer Danfoss Inc. 48 Exterran 48 drilling fluids 48 Helix Energy 48 Vanguard Natural Resources 48 Schlumberger Limited 48 Clean Harbors 48 NYSE FLR 48 Marsulex 48 Brush Engineered Materials 48 WSP Holdings 48 Geokinetics 48 NYSE PKI 48 Copano Energy LLC 47 Covidien NYSE COV 47 ABM Industries Incorporated 47 WW Grainger Inc. 47 Concho Resources Inc. 47 Schlumberger SLB 47 Hornbeck Offshore 47 Bronco Drilling Company 47 Core Laboratories 47 Inc. NYSE EME 47 Rosetta Resources 47 NYSE PDE 47 NYSE ASH 47 Brigham Exploration Company 47 Parker Hannifin Corporation 47 Layne Christensen 47 FMC Technologies 47 NuStar Energy 47 Superior Offshore 47 American Railcar Industries 47 Silgan Holdings 47 Terex Corporation 47 Diamond Offshore 47 PolyOne Corporation 47 WESCO International