Drilling tool bearing and drivetrain assembly
AssigneeHalliburton Energy Services, Inc.
InventorsJohn Keith Savage, Steven Graham Bell
Life of this patent
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Abstract
A downhole drilling motor, system, and method for using same are disclosed. A downhole drilling motor can include a power section stator having a first end, a second end, an internal cavity passing therethrough. The downhole drilling motor can further include a rotor assembly positioned and fully encased in the internal cavity. The rotor assembly includes a power section rotor, a drivetrain operably coupled to the power section rotor and a bearing set. The power section rotor is positioned at the first end within the internal cavity of the power section stator. The power section rotor, the drivetrain, and the bearing set are fully encased in the internal cavity of the power section stator. Additional apparatuses, systems, and methods are disclosed.
Claims18
A motor comprising:
- a power section stator comprising a single body having a first end, a second end, and an internal cavity passing therethrough;
- a cartridge assembly fully encased in the internal cavity of the single body, the cartridge assembly comprising:
- a rotor assembly positioned in the internal cavity, the rotor assembly including
- a power section rotor having rotor lobes to cooperate with one or more stator lobes of the power section stator,
- a drivetrain operably coupled to the power section rotor, and a bearing set;
- wherein the cartridge assembly is capable of being loaded as a single unit into the internal cavity through the first end.
A system comprising:
- a drill string;
- a motor assembly coupled to the drill string through a rotary shouldered connection, the motor assembly including
- a power section stator comprising a single body having a first end, a second end, and an internal cavity passing therethrough,
- a cartridge assembly fully encased in the internal cavity of the single body, the cartridge assembly comprising:
- a rotor assembly positioned and fully encased in the internal cavity, the rotor assembly including
- a power section rotor having rotor lobes to cooperate with one or more stator lobes of the power section stator,
- a drivetrain operably coupled to the power section rotor, and
- a bearing set, and
- wherein the cartridge assembly is capable of being loaded as a single unit into the internal cavity through the first end;
- and
- a drill bit coupled to the drivetrain through a driveshaft.
A method of operating a motor in a well drilling operation, the method comprising:
- loading a cartridge assembly comprising a rotor assembly and a bearing set into a first end of an internal cavity of a single body of a power section stator as a single unit, the rotor assembly including a power section rotor, a drivetrain operably coupled to the power section rotor, and the bearing set, such that the cartridge assembly is fully encased in the internal cavity of the single body, to construct a motor assembly;
- coupling the motor assembly to a drill string;
- introducing a drilling fluid into a second end of the internal cavity of the single body;
- and
- forcing the drilling fluid through a cavity between the power section stator and power section rotor with sufficient pressure to cause the power section rotor to rotate relative to the power section stator to provide a torque force to a drill bit coupled to a driveshaft coupled to the drivetrain.
Dependencies are inferred from the claim text.