Top-30-Oilfield-Services-Companies-2018-01. Schlumberger
Schlumberger
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The trophy for top oilfield services company remains in Houston as sector leader, Schlumberger, stays top of the pile. The firm earned over $30bn last year and penned a major contract for drilling rigs and services for oil and gas wells with Saudi Aramco. It will also develop a manufacturing base in the kingdom. The Abu Dhabi National Oil Company (ADNOC) has collaborated on a joint training facility to benefit UAE Nationals.