Patent ID: 6915851
Filing Date: 2005-07-12
Classification: E21B

Abstract:
1. A liner for lining a casing affixed within a well bore, the casing having an inner diameter and an internal wall, the liner comprising: a polymeric pipe having a wall with an inner diameter, an outer diameter, an interior surface, and an exterior surface, the exterior surface provided with a plurality of grooves and ridges, the outer diameter of the polymeric pipe being reduceable by the application of radially compressive forces to the ridges so that the outer diameter of the polymeric pipe is less than the inner diameter of the casing and so that point loads are created that cause the polymeric pipe to deform non-uniformly whereby stress induced to the polymeric pipe by the reduction thereof is stored in the polymeric pipe thereby decreasing the rate of expansion of the polymeric pipe and thus allowing the polymeric pipe to be inserted into the casing to a desired depth prior to the polymeric pipe expanding and engaging the internal wall of the casing, wherein the grooves and the ridges of the polymeric pipe form a substantially sinusoidal profile and wherein the ridges of the polymeric pipe are truncated to provide the ridges with a substantially flat end surface.