Positionable downhole gear box
AssigneeHalliburton Energy Services, Inc.
InventorDaniel Martin Winslow
Life of this patent
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Abstract
The subject matter of this specification can be embodied in, among other things, a tool string positionable in a wellbore that includes a spur gear driven by a source of input rotation, a planetary gearbox having an attachment structure to connect to the spur gear. The gearbox includes a central sun gear, a collection of planet gears disposed in a planet gear carrier disposed around the central sun gear, and a ring gear disposed around the planet gears and planet gear carrier. The attachment structure drives a hydraulic pump or electrical generator at a rotational speed different than a rotational speed of the source of input rotation.
Claims18
A gear system of a tool string positionable in a wellbore comprising:
- a source of input rotation;
- a spur gear drivable by the source of input rotation;
- an attachment structure coupled at a first end to an output of the spur gear and coupled at a second end to an input of a gearbox, said gear box including:
- a central sun gear;
- a plurality of planet gears disposed in a planet gear carrier disposed around the central sun gear;
- and
- a ring gear disposed around the planet gears and planet gear carrier;
- wherein a rotation of the ring gear drives a down hole tool at a rotational speed different than a rotational speed of the source of input rotation.
A method of driving a gear system of a tool string positionable in a wellbore 1 comprising:
- providing a source of input rotation;
- providing a spur gear;
- driving the spur gear with the source of input rotation at a first rotational speed;
- providing a gearbox assembly including:
- a central sun gear;
- a plurality of planet gears disposed in a planet gear carrier disposed around the central sun gear;
- and
- a ring gear disposed around the planet gears and the planet gear carrier;
- driving a gearbox with an output of the spur gear;
- and
- driving a downhole tool with an output of the gearbox at a second rotational speed.
Dependencies are inferred from the claim text.