US Patent Issued to Keller North America on June 30 for "Collapsible casing tightener and method of use" (New Jersey Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,669,021, issued on June 30, was assigned to Keller North America Inc. (Hanover, Md.).

"Collapsible casing tightener and method of use" was invented by John R. Grillo (Midland Park, N.J.) and Justin Lukens (Lansdale, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A collapsible casing tightener comprising an outer body with hollow cylindrical main section open at one end and closed at the other at a shoulder. A reduced neck protrudes from the shoulder to a collar for attachment to a drill rig. The cylindrical main section is defined by a radial array of angularly spaced notches each comprising a narrow aperture through the wall. Internally, a hollow ...