Does Putin need the support of the Russian oligarchs in order to stay in power?

Does Putin need the support of the Russian oligarchs in order to stay in power? What power does the Russian oligarchs have over Putin? I heard a lot of the oligarchs have ties to Putin and a lot of them are ex-KGB members, so I am wondering if they have a lot of political power and if they can somehow use their political power against Putin. If so, in what ways?