Downhole motor or pump components, method of fabrication the same, and downhole motors incorporating the same

摘要

Exemplary embodiments provide a progressive cavity pump or motor including a stator having a longitudinal bore and a rotor rotatably disposed within the longitudinal bore of the stator. The rotor includes a rotor core and a resilient outer layer formed of a resilient material bonded onto the outer surface of the rotor core. The resilient outer layer sealably connects the helical configurations on the outer surfaces of the rotor and the stator as the rotor rotates within the longitudinal bore of the stator.

主权项

1. A progressive cavity drive component, comprising:
a first progressive cavity drive component rotatably positionable within a longitudinal bore of a second progressive cavity drive component, the first progressive cavity drive component comprising:
a metallic shaft having a length and an outer surface, the outer surface being apportioned along the length of the metallic shaft in to a plurality of sections, the metallic shaft having a first helical configuration formed on the outer surface that is complementary to a helical surface configuration of the second progressive cavity drive component, anda resilient outer layer formed of a resilient material bonded to the outer surface of the metallic shaft along the length of the metallic shaft, the resilient material further including a first resilient outer layer formed of a first material and a second resilient outer layer formed of a second material different from the first material of the first resilient outer layer, wherein the first resilient outer layer is formed to surround the metallic shaft at a first section of the plurality of sections of the outer surface of the metallic shaft and the second resilient outer layer is formed to surround the metallic shaft at a second section of the plurality of sections along the metallic shaft that is different from the first section.