Colli - Forged Friction Welded Drill Pipes

Our forged and friction welded pipes are state of the art in drill pipes. This technology can increase resistance on the weld, which is obtained by the upsetting of the extremity of the tube where the friction weld is made, coupled with the extreme strength of the special steel used for the production of the tool joints and the maximized life of the threads thanks to the nitriding heat treatment made on the threads.