The oil and gas industry faces many challenges when drilling into the Earth at unprecedented depths to explore and extract underground resources. Traditional workaround methods to extend tool life, like installing wires with thicker insulation have proven ineffective against high temperatures and aggressive chemicals. All of which results in unexpected tool failures that are expensive to replace, shorter tool run-times, more maintenance/downtime and lost production.


GORE Magnet Wire is designed specifically to operate reliably in extreme oil and gas downhole environments, minimizing the risk of catastrophic failures for maximum tool-run times. Our mechanically robust wires have a unique engineered fluoropolymer insulation that’s exceptionally resistant to difficult conditions like chemicals, hydrolysis, and up to high pressure, high temperature (HPHT) environments.


We compared our magnet wire to a polyimide enameled wire using ASTM/NEMA MW 1000 test method. For both wires, we used the same AWG size with comparable insulation thicknesses. We tested the dielectric voltage breakdown after 12 days exposure to hydrolysis in 0.3% H2O and synthetic oil at 280°C.

Results showed that our magnet wire maintained maximum voltage endurance after continuous exposure to hydrolysis and harsh fluids at elevated temperatures. But, the polyimide enameled wire became brittle and cracked right away under mechanical stress. This type of wire lost its insulation resistance and voltage breakdown performance, which is unacceptable when trying to avoid tool failures, keep on schedule, and stay on budget.

GORE Magnet Wire is proven to provide durable mechanical protection and superior electrical performance continuously in severe downhole environments — extending motor life and increasing tool reliability for less risk of unexpected catastrophic failures.

Voltage Breakdown Under HPHT


GORE Magnet Wire provides manufacturers with many benefits that improve electrical and mechanical performance such as:

  • enhanced durability due to specialized insulation materials
  • exceptional resistance to aggressive chemicals and hydrolysis
  • superior electrical performance in wide-ranging temperatures up to 260°C
  • proven highest voltage endurance in harshest downhole environments
  • longer motor life and increased tool reliability
  • minimize the risk of unexpected catastrophic failures

Please contact Windings, Inc. to learn more about downhole motors featuring GORE Magnet Wire:
US Toll-free: 800 795 8533 


These values demonstrate the electrical, mechanical and environmental performance of GORE Magnet Wire.



Operating Voltage Range (V) AC 300 — 600
Spark Test Voltage (V) AC 1500
Dielectric Breakdown Voltage (kV) tested per ANSI/NEMA MW 1000a 4.4
Wire Insulation Engineered Fluoropolymer
Conductor Bare Copper
Operating Temperature Range (°C) -55 to +260
RoHS Compliant


a Testing based on size AWG 2801



Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.