ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,754, issued on April 22, was assigned to Tri-Lift Services Inc. (Crescent, Okla.).
"Lubricator for bypass plunger" was invented by Kevin L. Kegin (Crescent, Okla.) and Joey B. Thompson (Guthrie, Okla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lubricator for a plunger lift system includes a tubular body, a bumper housing, a bumper sub, a first spring, and a second spring. The bumper housing is disposed in the tubular body and has a chamber, a lower end, and an upper end. The lower end is open to receive an upper end of a shift valve of a bypass plunger. The bumper sub has a lower end and an upper end and is slidably disposed in the chamber of t...