Electromagnetic heating of oilfield wellhead piping

By using the positioning heating components of the electromagnetic heating device and the design of non-magnetic materials, the problem of uneven freezing inside the wellhead pipeline is solved, achieving efficient and safe local heating to meet the application needs of different pipe diameters.

CN122129649APending Publication Date: 2026-06-02LIAONING ZHIDA INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LIAONING ZHIDA INTELLIGENT TECH CO LTD
Filing Date
2026-04-14
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing heating devices are unable to effectively address the problem of uneven oil freezing in wellhead pipelines, resulting in energy waste and low unblocking efficiency, and are difficult to adapt to pipelines of different diameters.

Method used

An electromagnetic heating device is used, which uses a positioning heating component to move along a three-dimensional track composed of a horizontal slide and a vertical through-slot to achieve precise positioning and heating of the locally frozen area. Combined with non-magnetic materials and heat insulation board design, energy waste and the risk of burns are avoided.

Benefits of technology

It achieves efficient and targeted heating of frozen oil in wellhead pipelines, improving energy utilization efficiency and unblocking speed, adapting to different pipe diameters, and ensuring operational safety.

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Abstract

This invention discloses an electromagnetic heating device for oilfield wellhead pipelines, comprising a circular sleeve frame. Several horizontal grooves are horizontally formed on the sidewalls of the sleeve frame, and vertical through-grooves are vertically formed between adjacent horizontal grooves. Several positioning heating components are slidably connected to the circular sleeve frame at the horizontal grooves. These positioning heating components can slide radially along the horizontal grooves or perform circular motion on the horizontal grooves. This device, through a three-dimensional moving track formed by the horizontal grooves and vertical through-grooves, enables the positioning heating components to move axially and radially along the circular sleeve frame, and to perform circular motion on the sleeve frame. This not only allows the device to adapt to pipelines of different diameters, but also enables it to accurately locate the most severely frozen and thickest areas of the pipeline wall, achieving targeted heating, significantly improving energy utilization efficiency and unblocking speed, and adapting to the uneven freezing conditions in oilfield wellhead pipelines caused by differences in temperature and flow fields.
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