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1. (WO2013124626) STATOR FOR PROGRESSIVE CAVITY PUMP/MOTOR

Pub. No.:    WO/2013/124626    International Application No.:    PCT/GB2013/050334
Publication Date: Fri Aug 30 01:59:59 CEST 2013 International Filing Date: Thu Feb 14 00:59:59 CET 2013
IPC: F04C 2/107
Applicants: NATIONAL OILWELL VARCO, L.P.
Inventors: MORRIS, Andrew
Title: STATOR FOR PROGRESSIVE CAVITY PUMP/MOTOR
Abstract:
A stator for a progressive cavity pump or motor, comprising: a stator housing having a longitudinal axis; and a stator insert of a material moulded within the housing, the stator housing further comprising, an outer tube having an inner surface; a plurality of framework elements disposed on the inner surface of the outer tube; at least one recess in the inner surface of the outer tube; wherein the conjunction of said framework elements and said at least one recess define a plurality of chambers receiving insert material therein whereby said insert material is mechanically fixed axially, radially and torsionally within the outer tube.