Putin is a lot smarter than that. He signed this deal before the start of the Winter Olympics. This is on top of the 30 year deal he already had with China. And they are going to be paid in either Euros or Gold (bypassing the use of USD). He was one step ahead of any possible US sanctions.

Putin hails $117.5 bln of China deals as Russia squares off with West

MOSCOW/SINGAPORE, Feb 4 (Reuters) - President Vladimir Putin unveiled new Russian oil and gas deals with China worth an estimated $117.5 billion on Friday, promising to ramp up Russia's Far East exports at a time of heightened tension with European customers over Ukraine.