PROGRESSING CAVITY STATOR WITH METAL PLATES HAVING APERTURES WITH ENLARGED ENDS

摘要

Progressing cavity devices and systems are provided. In one embodiment, a system includes a metal stator (26) of a progressing cavity device (22, 36). The metal stator includes metal plates (80) with apertures (82) that are rotationally offset to form a winding rotor cavity (44). At least one of the apertures that form the winding rotor cavity has an elongated profile with enlarged ends (100, 102) having widths greater than that across the middle of the at least one aperture. Additional systems, devices, and methods are also disclosed.