Schlumberger NV, doing business as SLB, also known as Schlumberger Limited, is an American oilfield services company. As of 2022, it is both the world's largest offshore drilling company and the world's largest offshore drilling contractor by revenue. Schlumberger is incorporated in Willemstad, Curaçao, Netherlands Antilles. and trades on the New York Stock Exchange, Euronext Paris, the London Stock Exchange and SIX Swiss Exchange. Its principal executive offices are located in Houston, Texas. In 2022, the Forbes Global 2000 ranked Schlumberger the 349th largest company in the world. Wikipedia