ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,269, issued on Oct. 14, was assigned to Progressive Tool Design Inc. (Airdrie, Canada).

"Packerless fracking tool, system, piping assembly and method using continuous tubing for opening infinite stages of sliding sleeves" was invented by Sean P. Campbell (Airdrie, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tool, a piping assembly, a system using the tool and piping assembly, and a method using such tool and piping assembly for fracking and production of hydrocarbons from an underground hydrocarbon formation is disclosed. The tool is conveyed downhole using continuous tubing, and by application of fluid pressure supplied to the tool conf...