ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,170, issued on June 10, was assigned to XR Reserve LLC (Houston).

"Polycrystalline diamond radial bearing" was invented by David P. Miess (Magnolia, Texas), Gregory Prevost (Spring, Texas), Michael V. Williams (Conroe, Texas), Edward C. Spatz (Spring, Texas), Michael R. Reese (Houston) and William W. King (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A radial bearing assembly is provided. The radial bearing assembly includes polycrystalline diamond elements, each having an engagement surface in sliding engagement with an opposing engagement surface. The opposing engagement surface includes a diamond reactive material. The radial bearing as...