APPARATUS AND METHODS UTILIZING PROGRESSIVE CAVITY MOTORS AND PUMPS WITH ROTORS AND/OR STATORS WITH HYBRID LINERS

摘要

An apparatus for use downhole is disclosed that in one embodiment may include a rotor having an outer lobed surface disposed in a stator having an inner lobed surface, wherein the inner lobed-surface or the outer-lobed surface includes a sealing material on a first section thereof and a metallic surface on a second section thereof.