ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,103, issued on May 19, was assigned to Halliburton Energy Services Inc. (Houston).

"Hydraulic fracturing with modulating injection flow rate" was invented by Bruce Carl Lucas (Duncan, Okla.), Timothy Holiman Hunter (Duncan, Okla.), Glenn Howard Weightman (Duncan, Okla.) and Carlos Alfredo Vallejo Gordon (Duncan, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for hydraulic fracturing with a modulating flow rate includes a first electric pump system electrically coupled to a power supply and fluidly coupled to one or more first wellbores; a second electric pump system electrically coupled to the power supply and fluidly coupled to one or...