US Patent Issued to Halliburton Energy Services on Sept. 2 for "Plunger or piston with hardened insert" (Oklahoma Inventors)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,942, issued on Sept. 2, was assigned to Halliburton Energy Services Inc. (Houston).

"Plunger or piston with hardened insert" was invented by Justin Lee Hurst (Healdton, Okla.), Aric Martin Gillispie (Duncan, Okla.) and James Alan Olis (Duncan, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A valve assembly including: a hardened insert coupled with a hardened insert carrier; and a valve body coupled with a valve insert, wherein, in a closed configuration of the valve assembly, the valve body contacts a primary sealing surface of the hardened insert and the valve insert contacts an initial sealing surface of a hardened insert carrier to prevent ...