Schlumberger Limited is an oilfield services company. Schlumberger employees represent more than 140 nationalities working in more than 120 countries. Schlumberger has four principal executive offices located in Paris, Houston, London, and The Hague.

It was established in 1926 by Conrad and Marcel Schlumberger, two brothers hailing from Alsace, France. Since then it has come a long way by carving out its name as the highest revenue generator among all its competitors and offering reliable services to its international clients. The company recorded annual revenue of around 48 billion dollars in 2017.

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. Schlumberger is a Fortune Global 500 company, ranked 287 in 2016, and also listed in Forbes Global 2000, ranked 176 in 2016.

The company has completed the biggest projects in Saudi Arabia, Libya, Turkmenistan, and Russia, nations with the world’s largest oil reserves. It has a complex structure and subsidiary companies in Panama, the Netherlands, and the British Virgin Islands. It regularly trades on the London, Paris, and New York Stock Exchanges.

According to Wikipedia; marineinsight