I watched There Will Be Blood about a month ago, and while your description is overly brief and seems to give the impression that he never sees his son again until the son is a man(not true, the son actually returns after a year or so, having learned sign language), I never saw it as a father-son movie. If anything his rant to his son when th son mentions opening a business of his own is the best summary of the movie. Here is an oil tycoon who hates losing, hates competition, and he will use and do whatever it takes to make sure he's not just the one on top, but the only one within miles of the pyramid.