CHINA - 2023/02/15: In this photo illustration, the world's largest offshore drilling company ... [+] Schlumberger (SLB) logo is seen displayed on a smartphone with an economic stock exchange index graph in the background. (Photo Illustration by Budrul Chukrut/SOPA Images/LightRocket via Getty Images) SOPA Images/LightRocket via Getty Images SLB’s stock (NYSE: SLB), formerly known as Schlumberger, which provides oil field services including drilling, completion, and production solutions to upstream oil & ga ...