Sometimes in energy investing, the companies focused on services can be overlooked by investors, but they can be some of the most crucial components in the space. In the following video, Motley Fool energy analyst Joel South tells us about Core Laboratories (NYSE:CLB), a company that focuses on testing and analyzing reservoirs for the major oil and natural gas players. As drilling methods become more advanced with the current push toward horizontal drilling, the cost of drilling is shooting up, and companies like Core Laboratories, and the analyses they provide, are essential for increasing hydrocarbon yields in the new age of drilling.

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