You seem unable to understand that oil markets are global and since they're global, they are controlled by whoever produces a plurality of the commodity...in this case, OPEC.
All US oil companies can do is react to whatever OPEC does.
So if OPEC increases production, then US oil companies CUT production in order to maintain a static supply.
US oil companies will always be chasing OPEC because OPEC has a plurality in the global markets, so everyone has to react to them.
You don't understand this because you don't believe in capitalism.