Arctic Rigs 68 National Oilwell has successfully met the challenges of the Arctic, both offshore and onshore.  With over 25 years in playing a leader- ship role in cold weather rig design, and with a wealth of experience and knowledge ranging from the development of year-round offshore cold weather drilling, to the creation of completely self- contained, highly mobile onshore drilling systems.  Any challange can be met. Some major concerns when developing an arctic drilling or production rig are: the environment; limited space availability; storage of consumable supplies; mobility; operational safety; automation and the high costs of fuel. The rig design permits pad to pad moves with a minimum of outside work in severe arctic conditions. To date, National Oilwell has developed and provided the most efficient rigs on the north slope of Alaska. Ice Island drilling rig SSDC drilling barge Aerial view of Nabors and Doyon rigs at a National Oilwell facility. Mobile service rig