Schlumberger has the know-how to get oil and gas drillers out of a slump. One of the world's largest oilfield services companies with scores of business units, it provides a full range of services, including logging, drilling technologies and equipment, cementing, well construction and completion, and project management. Schlumberger also provides reservoir evaluation, development, and management services, and is developing new technologies for reservoir optimization. Through its WesternGeco business, the company provides highly efficient and scientifically advanced imaging platform to customers worldwide.