Looks like they are one step ahead of that.
After more than a decade of negotiations, China and Russia have agreed to a natural gas deal worth about $400 billion that represents a major step not only in global energy markets but also in geopolitics...
Could be that is the situation. russia will have to abandon her pipelines in these nations and perhaps russia is prepared to do exactly that. Reverse flow. Would have to set up infrastructure quickly and certainly this was discussed early and a plan is in place. Sever at border with russia and russia is out of the loop if that is where russia wants to go. russia cannot be stopped on that point but less money is less money anytime and this would be a loss of income to russia even with the deal with china. china might be the replacement to loss of income but income is income and cutting off the west of russia is eventually a loss to russia. Certainly russia understands this or putin has made a decision and has decided he will take his stand and take a chance. If so, big chance is being taken. Don’t know where will lead and could be a chance rewarded but sometimes chances are not rewarded. putin has to be aware of this and has calculated ... but a chance taken that does not go a nation’s way can cause a Good-Bye that never returns. Huge risk.