ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,870, issued on Dec. 16, was assigned to DynaEnergetics Europe GmbH (Troisdorf, Germany).
"Ballistically safe wellbore tool" was invented by Christian Eitschberger (Munich) and Thilo Scharf (Letterkenny, Ireland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ballistically-safe wellbore tool may include an explosive device, an initiator including an initiating charge, and a bias member. A relative configuration of the explosive device and the initiator may be switchable between a first configuration, in which the initiating charge is at a ballistically safe distance from the explosive device, and a second configuration, in which the initiating charg...