InvestmentsTop Global NewsMarketsReal Estate Exclusive: Schlumberger names new top executives to oversee corporate overhaul By financialnews_rlv83x - May 21, 2020 0 128 Schlumberger, the world’s largest oilfield services firm, will reshuffle top executives and operations in coming months to deal with this year’s historic decline in the oil industry, according to a memo to employees.