Schlumberger Well Service is one of the world's leading oilfield service businesses that offers technology, information solutions and integrated project management services that optimize reservoir performance for customers in the oil and gas industry. The company provides a wide range of products and services, including seismic acquisition and processing; formation evaluation; well testing, directional drilling, well cementing and stimulation; artificial lift and well completions; consulting; and software and information management. Its water services division specializes in assessing, developing and managing groundwater resources worldwide. Schlumberger Well Service employs more than 80,000 people in nearly 80 countries worldwide. The company operates in excess of 20 research and engineering facilities worldwide. It has operated for more than 80 years and is based in Houston.