ALEXANDRIA, Va., July 14 -- United States Patent no. 12,680,393, issued on July 14, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).
"Non-uniform roller cone" was invented by Philip Trunk (Houston) and Scott McDonough (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A roller cone may include an innermost region having roller cone cutting elements arranged thereon such that the cutting elements may be closer to a radial axis of a drill bit. A roller cone may include a central region having roller cone cutting elements arranged thereon. The central region of a roller cone may also include multiple zones where the cutting element density within the central region and/or zones may vary b...