actually Russia sanctions are proven not to be working. Both France and Italy are reconsidering extending sanctions:
Renzi blocks smooth extension of Russia sanctions
Italian Prime Minister Matteo Renzi on Thursday stayed firm on blocking a planned extension of the EU’s economic sanctions against Russia, forcing EU governments to discuss the issue at a much higher level next week.
Sanctions were set to be extended on Wednesday, but that did not happen after the Italian government instructed its ambassador to raise objections during a closed-door meeting of EU countries’ delegates, which was supposed to approve the extension without much political noise.
http://www.politico.eu/article/renzi...sia-sanctions/
Russia is pretty self sufficient and Saudi Arabia, Iran and others would go bankrupt due to low oil price long before Russia