Schlumberger (/ˈʃlʌmbərˌʒeɪ/) Limited is the world's largest oilfield services company. Schlumberger employs approximately 108,000 people representing more than 140 nationalities working in more than 85 countries. Schlumberger has four principal executive offices located in Paris, Houston, London, and the Hague.Schlumberger is incorporated in Willemstad, Curaçao as Schlumberger N.V. and trades on the New York Stock Exchange, Euronext Paris, the London Stock Exchange, and SIX Swiss Exchange.