Well string centralizer and method of forming

A wellstring assembly comprising:

• a tubular section and;
• a tubular device including a bore therethrough, the tubular device installed on the tubular section with the tubular section extending through the bore, the tubular device further including:
• a body including an exterior surface, a plurality of ribs extending radially outwardly from the exterior surface, a first end and a second end, the first and second ends extending circumferentially about the bore;
• the body further including a first body portion including an outer facing surface and an inner facing surface defining the bore, the first body portion being formed of a first material;
• and
• an outer shell secured over at least a portion of the outer facing surface of the first body portion, the outer shell formed of a second material more durable than the first material.

A method for manufacturing a centralizer, the method comprising:

• providing an outer shell defining an outer surface contour of the centralizer;
• providing a mold jig including a central mandrel;
• positioning the outer shell concentrically about the central mandrel to form an annular space therebetween;
• introducing a polymer in liquid form to the annular space;
• and
• allowing the polymer to set to form the centralizer, wherein the polymer, when set forms a first body portion with the outer shell attached thereto and overlying at least a portion of the first body portion.