ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,959, issued on Jan. 27, was assigned to Nabors Drilling Technologies USA Inc. (Houston).
"Top drive with drag chain" was invented by Camilo Rivera (Spring, Texas), Shubhangi Dalavi (Spring, Texas) and James Cooper (Spring, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A top drive that can include a stationary portion, a rotary portion rotationally coupled to the stationary portion, the rotary portion being configured to rotate about a center axis, a drag chain with a first end coupled to the stationary portion and a second end coupled to the rotary portion, a first circular path with a first radius relative to the center axis, and a second ci...