Our increased production of oil is due to the new technology of fracking (fracturing the ground to get oil out of it). The situation is certainly
not "We could have been fracking 15 years ago, but we didn't feel like it because Saudi gas was cheap". The energy sector is subject to the same process of technological advance that any other industry is. We came up with a new way to get oil out of the ground and figured out how to deploy it at scale. Saudi Arabia didn't have much to do with it. Gas could be selling for $2/gallon and people would still be tripping over themselves to get more of it out of the ground.
Secondly, the idea that we're keeping troops in the middle-east in order to get oil for ourselves is rather naive. There was nothing in the article about all the free oil that the US gets just because we have troops in Iraq. The different political factions there are fighting so hard over every drop of oil that there isn't any left for the iraqi people, much less the united states.
There are no conspiracies here. No international intrigues. Technology improved, so now we have more oil. The energy sector is about to go into a boom that's going to lift the whole country's economy.