Patent ID: 7396220

Claim:
A stator for use in a progressing cavity power section, the stator comprising: an outer stator tube including a longitudinal axis; a helical cavity component deployed substantially coaxially in the stator tube, the helical cavity component including a plurality of substantially rigid longitudinal stator sections concatenated end-to-end in the stator tube; a thin elastomer layer having a substantially uniform thickness deployed between an outer surface of the stator sections and an inner surface of the stator tube, the thin elastomer layer disposed to substantially prevent rotation of the stator sections about the longitudinal axis relative to the stator tube; each of the stator sections providing an internal helical cavity and including a plurality of internal lobes; the stator sections rotationally aligned with one another so that each of the internal lobes extends in a substantially continuous helix from one longitudinal end of the stator to an opposing longitudinal end of the stator, the stator sections rotationally restrained to substantially prevent relative rotation of the stator sections about the longitudinal axis; the helical cavity component further including a continuous elastomer liner deployed on an inner surface of the concatenated stator sections.