Nabors Industries Ltd. owns and operates a land-based drilling rig fleet in North America. The Company is a provider of offshore platform work over and drilling rigs. It conducts its Drilling & Rig Services business through four segments: U.S. Drilling, Canada Drilling, International Drilling and Rig Services. Its fleet of rigs and drilling-related equipment includes approximately 430 actively marketed rigs for land-based drilling operations in the United States, Canada and over 20 other countries throughout the world, and approximately 40 actively marketed rigs for offshore drilling operations in the United States and multiple international markets. It provides drilling technology and equipment, and well-site services, including engineering, transportation and disposal, construction, maintenance, well logging, directional drilling, rig instrumentation, data collection and other support services. In addition, it manufactures and leases or sells top drives and other rig equipment.