Patents Assigned to Pegasis S.r.l.
  • Patent number: 9470044
    Abstract: A process for treating a pin having an external threaded portion and a box having an internal threaded portion wherein the process provides a threadable joint having a high galling resistance. One embodiment of the present invention includes applying a lubricant on the threaded portion of at least one of the pin and box. The threadable joint is made up by threadably engaging the threaded portions of the pin and box to a recommended torque according to the American Petroleum Institute and then breaking out the threaded joint. The making up and breaking out step with lubricant applied on the threaded portion of at least one of the pin and box is performed a plurality of times. One of the threaded portions of the pin and box is then case hardened. The threadable joint made from this process is highly resistant to galling without the requirement of any lubricant.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: October 18, 2016
    Assignee: Pegasis S.r.l.
    Inventors: Alberto Alaria, Angelo Canavera