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US 8,800,688 B2Granted
Downhole motors with a lubricating unit for lubricating the stator and rotor
AssigneeBaker Hughes Incorporated
InventorsHendrik John, Harald Grimmer
Life of this patent
Estimating the term…
Abstract
In aspects, the disclosure provides a drilling motor that includes a lubricating unit that selectively supplies a lubricant to the drilling fluid before the drilling fluid passes through the drilling motor so as to lubricate the stator and/or the rotor to reduce friction between the stator and the rotor and to reduce wear of the motor.
Claims21
An apparatus for use downhole, comprising:
- a stator having an inner contour surface;
- a rotor having an outer contour surface disposed in the stator, wherein the outer contour surface of the rotor comes in contact with the inner contour surface of the stator;
- and
- a lubricating unit configured to selectively discharge a lubricant from a reservoir source thereof into a fluid so that the lubricant lubricates one of the inner contour surface of the stator and outer contour surface of the rotor when the rotor rotates in the stator from the fluid flowing between the stator and rotor, wherein the reservoir source is disposed in one of the stator and the rotor.
1 more element
A method of using a drilling motor in a wellbore, comprising:
- deploying the drilling motor in the wellbore, the motor including a rotor inside a stator;
- supplying a drilling fluid to the drilling motor to cause the rotor to rotate in the stator;
- and
- discharging a lubricant from a reservoir source using a lubricating unit associated with the drilling motor into the drilling fluid to lubricate one of the stator and the rotor during use of the drilling motor in the wellbore, wherein the reservoir source is disposed in one of the stator and the rotor.
1 more element
A drilling system, comprising:
- a bottomhole assembly;
- a drilling motor in the bottomhole assembly, the drilling motor including a rotor disposed in a stator and rotated by drilling fluid flowing between the stator and rotor;
- and
- a lubricating unit configured to supply a lubricant from a reservoir source thereof into the drilling fluid to lubricate the rotor and the stator, wherein the reservoir source is disposed in one of the stator and the rotor.
1 more element
Dependencies are inferred from the claim text.