$SLB(SLB)$ SLB N.V. [formerly known as Schlumberger] is the world's leading oilfield services company with a diversified portfolio of offerings. The business consists of four segments: Digital, Reservoir Performance, Well Construction, and Production Systems. With that being said, we can confidently say that SLB is an end-to-end oilfield services provider, from exploration to full field development and from reservoir to decommissioning.