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US 8,910,720 B2Granted
Downhole tool with roller screw assembly
AssigneeSchlumberger Technology Corporation
InventorsFranz Aguirre, Wade D. Dupree, Mark Holly, Derek Copold
Life of this patent
Estimating the term…
Abstract
A downhole tool for positioning in a wellbore comprises a tool main body, an electric motor disposed within the tool main body, the motor comprising a rotor rotatably attached to a stator, and a linear actuator assembly disposed within the motor for transforming a rotary output of the motor into a linear displacement.
Claims8
A downhole tool for positioning in a wellbore, comprising:
- a tool main body;
- an electric motor disposed within the tool main body, wherein the electric motor comprises a motor housing, and wherein a stator and rotor are disposed within the motor housing, and wherein the rotor is rotatably attached to the stator;
- and
- a linear actuator assembly comprising an axially moveable roller carrier having at least one roller for connecting with a roller nut, wherein the roller nut is connected with the rotor, and wherein the roller carrier, roller nut, and roller are contained within the motor housing, wherein a push rod is connected with the roller carrier and moves axially in tandem with the roller carrier, and wherein the push rod at least partially extends out of the motor housing.
1 more element
A downhole tool for positioning in a wellbore, comprising:
- a tool main body;
- an electric motor disposed within the tool main body, wherein the electric motor comprises a motor housing, and wherein a stator and rotor are disposed within the motor housing, and wherein the rotor is rotatably attached to the stator;
- and
- a linear actuator assembly comprising:
- a roller nut affixed to an interior surface of the rotor, wherein the roller nut is located within the motor housing;
- an axially moveable roller carrier operatively engaged with the roller nut, wherein the roller carrier is located within the housing;
- and
- a push rod connected with the roller carrier, wherein the push rod moves axially in tandem with the roller carrier, and wherein the push rod extends from the housing of the electric motor.
5 more elements
Dependencies are inferred from the claim text.