US Patent Issued to EPIROC ROCK DRILLS AKTIEBOLAG on May 6 for "Method and system for detecting a loosened joint of a drill string" (Swedish Inventors)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,932, issued on May 6, was assigned to EPIROC ROCK DRILLS AKTIEBOLAG (Orebro, Sweden).

"Method and system for detecting a loosened joint of a drill string" was invented by Gustav Mortzell (Orebro, Sweden) and Thomas Adolfsson (Orebro, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a method for determining the state of a joint joining a first and a second drill string component. A drill rig includes a rotation unit for rotating the drill string and means for determining a representation of a torque applied by the rotation unit. A joint loosening mechanism distinct from the rotation unit apply a joint loosening torque ac...