ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,549, issued on Feb. 4, was assigned to Ulterra Drilling Technologies LP (Fort Worth, Texas).
"Drill bit" was invented by Jorge Arthur Silveus III (Fort Worth, Texas), Alfred Harold Skinner (Aledo, Texas) and Benjamin Chrest (Fort Worth, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drill bit including a body having a face and a plurality of blades disposed on the face of the body. Each of the plurality of blades may have a row of cutters disposed thereon, and the rows of cutters may collectively define a cutting profile of the drill bit. At least some of the cutters along the cutting profile may have alternating positive back rake angles. Th...