O'Sullivan, who is trying to win his sixth Crucible title, won seven of the eight frames played to secure a last-four tie against either Dominic Dale or last year's runner-up Barry Hawkins. Earlier, Mark Selby reached the semis with a 13-5 victory over Alan McManus. The 2007 runner-up will now play either Judd Trump or Neil Robertson.
O'Sullivan, who is the overwhelming favourite to secure his third successive title, won with a session to spare, although the 38-year-old said he had overcome an issue with his cue following Tuesday's session.
