Downbore Motor Coiled Electro-Drill with Friction Pads for Anti-Torque and WOB with Wearable Tungsten/Niobium Carbide Traction Drive Speed-Increaser Posted on May 7, 2023November 20, 2023 by Christophe Pochari Share this:TwitterFacebookLike Loading... Related Published by Christophe Pochari Inventor View all posts by Christophe Pochari