Nabors Drilling USA markets a range of land rigs. It is one of the largest oil and gas land drilling contractors in the world. The company offers diverter systems, preventers and choke manifolds, and drill pipe and bottom-hole assemblies on a rental basis. Nabors Drilling USA operates more than 300 drilling rigs. It provides equipment engineering, technical and upgrade services. Nabors Drilling USA administers a safety tool program. It is a subsidiary of Nabors Industries, which owns and operates over 530 land drilling and nearly 760 work over rigs in North America. The parent company offers oil field construction, rig instrumentation and directional drilling solutions.