The present invention provides a method and apparatus for plugging a wellbore in a trip saving manner. In one aspect, the invention includes a cement retainer disposed on a run-in string and a radially expanded perforating assembly disposed below the cement retainer. In a single run, the apparatus provides...http://www.google.es/patents/US6595289?utm_source=gb-gplus-sharePatente US6595289 - Method and apparatus for plugging a wellbore
