ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,273, issued on Oct. 14, was assigned to Weatherford Technology Holdings LLC (Houston).
"Limitless injection shoe" was invented by Travis W. Massey (Spring, Texas) and Joshua V. Symms (Cypress, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for cementing a casing string allows for a deactivation fluid to be injected into a toe of a wellbore in sufficient quantities without displacing cement accumulated in an annulus around the casing string. The method includes landing a first isolation device within a flow path to isolate a shoe track from an annular isolation apparatus and a communication tool. A seal member of the annular isolation ...