[SmokingJoe]

Also unlike in Saudia Arabia oil in Russia is extracted by numerous private companies. There is no mechanism to force them to cut supply

You sure of that?

[NorseViking]

Yes, government has influence on several companies it owns stock in but that is all. The rest don’t care about OPEC. That was a cause of disagreement to with Saudis for a long time. Also if cost more money to put a well online in Russia given they are mostly in unhospital geography. If these are online the owners are running them to the highest possible capacity. Nobody would lose investments and hard work put into it only because the government wants it.
I suspect the same is partially true for the US industry although frackers are more flexible.