ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,503,928, issued on Dec. 23, was assigned to Workover Solutions Inc. (Imperial, Pa.).

"Self cleaning fracking plug and method" was invented by Kyle Craker (Quaker City, Ohio) and Logen Kanngiesser (Wheeling, W.va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A plug used in the hydraulic fracking of hydrocarbon wells. The plug, known as a frac or bridge plug, contains one or more containers housing a chemical substance such as a solid, liquid, or gel composition. The composition may constitute or include a cleaning agent, friction reducer, suspending agent, or other wellbore additive. For example, the composition may constitute or include epoxy componen...