US Patent Issued to Thru Tubing Solutions on Oct. 28 for "Vortex controlled variable flow resistance device and related tools and methods" (Oklahoma Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,874, issued on Oct. 28, was assigned to Thru Tubing Solutions Inc. (Newcastle, Okla.).

"Vortex controlled variable flow resistance device and related tools and methods" was invented by Roger L. Schultz (Ninnekah, Okla.), Andrew M. Ferguson (Oklahoma City) and Michael L. Connell (Mustang, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A vortex-controlled variable flow resistance device ideal for use in a backpressure tool for advancing drill string in extended reach downhole operations. The characteristics of the pressure waves generated by the device are controlled by the growth and decay of vortices in the vortex chamber(s) of a flow path. Th...