The present invention provides apparatus and methods for expanding tubulars in a wellbore. In one aspect, a process of sealing an annular area in a wellbore is provided in which a tubular having perforations at a predetermined location and a sleeve concentrically covering substantially all of the perforations...http://www.google.com.au/patents/US6662876?utm_source=gb-gplus-sharePatent US6662876 - Method and apparatus for downhole tubular expansion
