Nabors Drilling USA is a division of The Nabors Industries. Nabors owns and operates more than 600 land drilling and 970 land work over and well-servicing rigs worldwide. Offshore, Nabors operates 44 platforms, 17 jack-ups and three barge rigs in the domestic and international markets. Nabors markets 30 marine transportation and support vessels, primarily in the United States Gulf of Mexico. In addition, Nabors manufactures top drives and drilling instrumentation systems and provides comprehensive oilfield hauling, engineering, civil construction, logistics and facilities maintenance, and project management services. Nabors participates in most of the significant oil, gas and geothermal markets in the world. Nabors is also one of the largest well-servicing and production services contractors in the U.S. through Pool Well Services Company, in Canada through Nabors Production Services and in select international markets.