Downhole induction heater and coupling system for oil and gas wells

Access full-text files




Clay Hearn
Michael Worthington
Jon Hahne
Raymond C. Zowarka, Jr.
Siddharth B. Pratap
Mukul M. Sharma
Michael D. Werst
Hsing-Pang Liu
Bryan Bunkowski

Journal Title

Journal ISSN

Volume Title


United States Patent and Trademark Office


Described herein are methods and system that use electromagnetic heating to heat wellbores and the fluids therein. The heating is achieved by placing one or more permanent magnets in the wellbore and moving a metallic component and/or the one or more permanent magnets relative to each other. This generates eddy currents in the metallic component, which heat the metallic component. This heat is transferred to the fluids in the wellbore from the metallic component by convection. In some embodiments, permanent magnets are installed in the tubing to induce eddy current heating in a well by converting the linear motion of a sucker rod to rotary motion of a conducting tube using a lead or ball screw. The heater may directly integrate with existing pump jack equipment with little or no additional infrastructure required.



LCSH Subject Headings