a string to be expanded is run in with a running string that supports a swage assembly . the running string is secured to the existing tubular and the top of the string to be expanded is sealed around the supported running string . the pressure applied to the annular space above the seal drives the liner over the swage . a cement shoe is affixed to the lower end of the string that is expanded after becoming detached from the running string assembly . when the expanded liner bottoms on a support , generally the hole bottom , the cement is delivered through the shoe and the expansion of the top of the string into a recess of the string above continues . the swage assembly with the seal and the anchor are then recovered as the running string is removed during the process of expanding the top of the expanded string into the lower end recess of the existing string already in the wellbore .