Schlumberger N.V. is a supplier of technology, integrated project management and information solutions to the international oil and gas exploration and production industry. The Company operates in the oilfield service markets through three groups: Reservoir Characterization, Drilling and Production. Reservoir Characterization Group consists of the principal technologies involved in finding and defining hydrocarbon resources. These include WesternGeco, Wireline, Testing Services and Schlumberger Information Solutions. Drilling Group consists of the principal technologies involved in the drilling and positioning of oil and gas wells and consist of Bits & Drilling Tools, M-I SWACO, Drilling & Measurements, Land Rigs and Integrated Drilling Services. Production Group consists of the principal technologies involved in the lifetime production of oil and gas reservoirs and includes Well Services, Water Services, Integrated Production Services and Schlumberger Production Management.