Progressing cavity stator including at least one cast...

Details Progressing cavity stator including at least one cast... Progressing cavity stator including at least one cast...

E - Fixed Constructions

21

B

E21B 4/02 (2006.01) F01C 1/107 (2006.01) F01C 5/04 (2006.01) F04C 2/107 (2006.01)

Patent

CA 2535687

A progressing cavity stator and a method for fabricating such a stator are disclosed. Exemplary embodiments of the progressing cavity stator include a plurality of rigid longitudinal stator sections concatenated end-to-end in a stator tube. The stator sections are rotationally aligned so that each of the internal lobes extends in a substantially continuous helix from one end of the stator to the other. The stator further includes an elastomer liner deployed on an inner surface of the concatenated stator sections. Exemplary embodiments of this invention include a comparatively rigid stator having high torque output and are relatively simple and inexpensive to manufacture as compared to prior art rigid stators.

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