Solicitor general has lifted an injunction that prevented Petróleo Brasileiro S.A. - Petrobras (BOVESPA:PETR4) from selling a 90% stake in gas pipeline unit Transportadora Associada de Gas or TAG which is expected to fetch more than $7 billion, Reuters reported. Roberto Castello Branco, Petrobras' new CEO, stressed the need for the state-controlled energy company to begin divestments in the refining and natural gas sectors. It is not immediately clear whether the oil firm would proceed with the sale, Reuters said.