ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,840, issued on March 17, was assigned to Halliburton Energy Services Inc. (Houston).
"Isolation plugs, ratchet systems, and methods to set a packing element" was invented by Evan Blott (Carrollton, Texas), Donald Ray Smith (Duncan, Okla.) and Matthew Dexter (Carrollton, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "An isolation plug includes a ratchet wedge having a set of threads formed along an interior surface of the ratchet wedge, where the set of threads are configured to permit movement in a first direction and restrict movement in a second direction. The isolation plug also includes a ratchet shoe configured to shift in the first dire...