I would suggest that it wasn’t the Saudi’s that drove down the price of oil.
It’s all about the US Dollar.
The Fed stopped QE* and told the world they “may” begin raising rates. That rightfully sent the Dollar on it’s current upward trend. The Saudi’s get US Dollars for their oil and most of those Dollars are spent in the Eurozone.
While the price per barrel has been cut in half it has been offset by the substantial increase their purchasing power as the US Dollar has appreciated against every major currency and in particular the Euro.
It’s almost a wash.
Russia’s dumped billions now in the US dollar...make no mistake it’s oil and the dollar...the two flow or not togther.