- S&P 400
Oil and gas exploration and production companies need a little support in order to ply their trade around the globe, and like a good neighbor, Nabors Industries, the world's largest land drilling contractor, helps them out. The company has about 500 land-drilling rigs, and more than 580 US-based and 174 Canada-based land workover and well-servicing rigs. Nabors operates across the US and in Africa, Canada, Latin America, East Asia, the Middle East, and Russia. Its offshore equipment includes 39 platform rigs, 12 jack-ups, and four barge drilling rigs. Nabors provides oil field hauling, maintenance, technical services, well logging, engineering, and construction services. It also has minor oil and gas holdings.