US 12,152,588 B1
Free-mold stator for a progressing cavity pump
Paula Kenny, Marple (GB); and Michael Davies, Stockport (GB)
Assigned to Grant Prideco, Inc., Wilmington, DE (US)
Filed by Grant Prideco, Inc., Wilmington, DE (US)
Filed on May 26, 2023, as Appl. No. 18/324,659.
Int. Cl. F04C 29/00 (2006.01); F01C 1/10 (2006.01); F01C 5/04 (2006.01); F01C 21/10 (2006.01); F04C 2/107 (2006.01); F04C 13/00 (2006.01); F04C 15/00 (2006.01)
CPC F04C 2/1075 (2013.01) [F04C 29/00 (2013.01); F04C 2240/10 (2013.01); F04C 2240/30 (2013.01); F04C 2240/802 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A free-mold stator for a progressing cavity pump, the free-mold stator comprising:
a housing including an inner housing surface defining an uninterrupted helical profile, wherein the housing includes at least two radial sections; and
a liner including an inner liner surface and an outer liner surface, the inner liner surface and the outer liner surface each defining an uninterrupted helical profile, wherein:
the inner housing surface is adapted to receive the outer liner surface to prevent rotational movement between the liner and the housing,
the liner is circumferentially continuous, and
at least one end of the liner includes a flange extending radially outward beyond the outer liner surface.
 
14. A free-mold stator for a progressing cavity pump, the free-mold stator comprising:
a housing including an inner housing surface defining an uninterrupted helical profile; and
a liner including an inner liner surface and an outer liner surface, the inner liner surface defining an uninterrupted helical profile and the outer liner surface defining a substantially uninterrupted helical profile, wherein the liner includes a first liner end and a second liner end; wherein the liner includes an anchor portion arranged between the first liner end and the second liner end extending radially outward from the outer liner surface separate from the substantially uninterrupted helical profile, the anchor portion adapted to prevent rotational movement between the liner and the housing.