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Downhole turbine assembly

  • US 10,280,717 B2
  • Filed: 12/09/2014
  • Issued: 05/07/2019
  • Est. Priority Date: 12/09/2014
  • Status: Active Grant
First Claim
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1. A downhole turbine assembly, comprising:

  • a stator housing having one or more stator blades positioned within the stator housing and extending radially inward therefrom;

    a rotor shaft rotatably positioned within the stator housing and having an upper portion provided at a first end of the rotor shaft and defining an upper bearing shoulder, a lower portion provided at a second end of the rotor shaft and defining a lower bearing shoulder, and an intermediate portion between the first end and the second end;

    one or more rotor blades secured to the intermediate portion for rotation with the rotor shaft and being interleaved with the one or more stator blades; and

    a first bearing assembly positioned at the first end and a second bearing assembly positioned at the second end, the first and second bearing assemblies each including a bearing housing, one or more radial bearings disposed in the bearing housing, and one or more thrust bearings disposed in the bearing housing, wherein at least one of the bearing housings provides a primary flow path and a secondary flow path, and wherein the secondary flow path extends through the one or more radial bearings and the one or more thrust bearings.

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