ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,088, issued on July 21, was assigned to FORUM US INC. (Houston).
"Retrievable free fall opening device assembly for cementing a wellbore and methods for use thereof" was invented by Jeffery Morrison (Missouri City, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for cementing a wellbore includes lowering a stage collar assembly into a wellbore, dropping a retrievable opening device into the wellbore, engaging the retrievable opening device with a seat of the stage collar assembly, opening cementing ports of the stage collar assembly, flowing cement into an annulus between the stage collar assembly and the wellbore via the cementing por...