ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,858, issued on Dec. 16, was assigned to Longbow Completion Services LLC (Midland, Texas).
"Hydraulic fracturing plug" was invented by Christopher Crews (Splendora, Texas), Joseph Mize (Midland, Texas) and Shawn Witt (Kirkland, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A plug and perforation system includes a plug that is configured to isolate formation zones within a wellbore that has a casing. The plug includes a flow control subassembly, an anchoring subassembly, and a sealing device. The flow control subassembly a valve assembly. The valve assembly includes a housing, a valve chamber inside the housing, a valve seat, and a valve elemen...