Patent ID: 7740077

Claim:
A method of completing a well for production of fluids from an underground formation, which method comprises: installing within the wellbore an artificial lift apparatus and a string of tubing, wherein: (a) the string of tubing includes a rigid metal tubular member having (i) a protruding end, (ii) a metallic outer surface that includes external threads on or around the protruding end and (iii) a metallic inner surface, wherein the string of tubing further includes a coupling that has internal threads that screw onto the external threads on the metallic outer surface and couple the rigid metal tubular member with another rigid metal tubular member; (b) the metallic inner surface of the rigid metal tubular member defines a metal tubular borehole; (c) a liner is disposed inside the metal tubular borehole adjacent to and against the metallic inner surface; (d) the liner has a liner end and comprises one or more layers; (e) at least one of the layers of the liner includes a polypropylene homopolymer; and (f) the liner end has been softened using a heat source and formed while in a softened condition around an outside surface of the protruding end of the rigid metal tubular member.