ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,600, issued on June 17, was assigned to Weatherford Technology Holdings LLC (Houston).
"Safety clutch system for circulation/fill-up/flowback tool" was invented by Federico Amezaga (Houston) and Ernst Fuhring (Langenhagen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A flowback tool is used on a top drive for delivering fluid flow to a tubular, such as a drillpipe or casing. A mechanical stroke on the tool has a mandrel with a mud saver valve and has a barrel. The mandrel connects to a quill of the top drive and has a coupling that can be threaded with the tubular's box connection. The barrel disposed on the mandrel can be moved by a cam e...