One investor has been amassing a huge position in oil services company National Oilwell Varco (NYSE:NOV); that investor is Warren Buffett. Ever heard of him? There is a reason that Buffett loves this stock so much, it is one of the few companies out there in the energy industry that is a pure play on the health of the entire industry. So unless you don't think that Warren Buffet is an investing genius, then perhaps this one should be on your radar as well.

As the company heads into the upcoming quarter, one aspect of the business to keep a close eye on is the manufacture and sales of floating production platforms. These high cost facilities will become a hot commodity as several regions around the world look to start pumping oil from offshoer fields, and National Oilwell Varco is looking to capture a large portion of that market. To learn more about this Buffett favorite and what its future will look like, tune into the video below.