Improved isolation barrier

摘要

An assembly 10 having a sleeve member 18 located over a tubular body 11, there being a chamber 21 between the two and by increased pressure in the chamber the sleeve member 18 is expanded to secure it to a well bore wall and create a seal between the sleeve and well bore wall to form an isolation barrier. The tubular body is formed in one or more sections so that annular planar faces 36 are created for abutment between the sleeve member 18 and the tubular body 11 so as to remove the requirement for complex fittings and reduce the time of construction. A later embodiment relates to a method of setting said assembly.