In this video, Motley Fool Energy Analyst Taylor Muckerman tells us about Seadrill's (NYSE:SDRL) big new $590M purchase: an ultra-deepwater semi-submersible rig. Muckerman tells us how this should have an immediate impact on both the company's cash flow and overall finances. He also discusses some other expansion plans for the ultra-deepwater sector.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.