Downhole device employing an electromagnet assembly and permanent magnet assembly to actuate a movable feature

The downhole device employs electromagnet and permanent magnet assemblies to actuate a movable element, addressing safety concerns and reducing power consumption, thereby improving the efficiency and reliability of fluid control in downhole environments.

WO2026136637A1PCT designated stage Publication Date: 2026-06-25HALLIBURTON ENERGY SERVICES INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HALLIBURTON ENERGY SERVICES INC
Filing Date
2025-12-18
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Existing downhole devices, such as safety valves, face challenges in efficiently controlling fluid flow without mechanical or electrical failures, particularly in the oil and gas industry, due to reliance on separate retention mechanisms that pose safety concerns and require significant electric power to maintain actuated positions.

Method used

A downhole device utilizing electromagnet assemblies and permanent magnet assemblies to actuate a movable element, where the electromagnet assemblies generate an electromagnetic field with a polarity opposite to the permanent magnet assemblies' inherent magnetic field, reducing the need for separate retention mechanisms and optimizing electric power usage throughout the actuation process.

Benefits of technology

The solution provides reliable and safe actuation of the movable element with reduced power consumption, enhancing safety and efficiency by minimizing the need for mechanical retention features and optimizing electric power requirements.

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Abstract

Provided is a downhole device, a method, and a well system. The downhole device, in one aspect, includes a permanent magnet assembly fixed to one of a member or a movable element, the permanent magnet assembly producing an inherent magnetic field having a magnetic polarity (X), the permanent magnet assembly generating a magnetic coupling force that biases the movable element toward the first position. The downhole device, in one aspect, further includes an electromagnet assembly fixed to an other of the movable element or the member, the electromagnet assembly operable to receive electric power to produce an electromagnetic field having an electromagnetic polarity (Y) similar in direction to the magnetic polarity (X), the electromagnetic field configured to generate an opposite electromagnetic coupling force greater than the magnetic coupling force to actuate the movable element from a first position towards a second position when the electromagnet assembly receives the electric power.
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