Patent ID: 8141629
Filing Date: 2012-03-27
Classification: E21B,Y10T

Abstract:
1. A centralizer comprising: a body having a bore, a first end and a second end, the first and second ends extending circumferentially about the bore, the body being formed of a polymer material; an annular metal band having an end with a bonding surface bonded to the first end of the body, the band having an inner diameter free of contact with the body and having an outer diameter flush with an outer diameter of the first end of the body; a metal sleeve having an end joined to the bonding surface of the band and extending into and embedded within the body, the sleeve having a cylindrical wall with an inner diameter larger than the inner diameter of the band and an outer diameter smaller than the outer diameter of the band, such that both the inner and the outer diameters of the cylindrical wall of the sleeve are embedded within the body; and a flat metal flange on the second end of the sleeve, defining a T-shaped configuration when viewed in cross section, the flange having an inner diameter larger than the inner diameter of the sleeve and an outer diameter smaller than the outer diameter of the sleeve, such that the flange is entirely embedded within the body.