ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,416,218, issued on Sept. 16, was assigned to ConocoPhillips Co. (Houston).
"Behind casing cementing tool" was invented by Lars Hovda (Tananger, Norway), James C. Stevens (Willis, Texas), Dan Mueller (Houston) and Praveen Gonuguntla (San Antonio).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a cementing tool for use in oil and gas well decommissioning operations, in particular so called perforate, wash and cement procedures. The tool (1) is designed for running in a well on drill string and for jetting cement through previously formed perforations in the casing (10) to fill the outer annulus (9) with cement. The tool (1) has a c...