US Patent Issued to Southwest Petroleum University on June 17 for "Combined drill bit based on electro-pulse-drilling technology" (Chinese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,593, issued on June 17, was assigned to Southwest Petroleum University (Chengdu, China).

"Combined drill bit based on electro-pulse-drilling technology" was invented by Xiaohua Zhu (Chengdu, China), Weiji Liu (Chengdu, China) and Hai Hu (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A combined drill bit based on the electro-pulse-drilling technology includes a PDC bit, a ground electrode, a high-voltage electrode, a high-voltage electrode spring, an electrode drill bit spring, electrode screws, an insulating rod, an insulating spline sleeve, a high-voltage cable connector, an insulating limit cover, a lower bearing, an upper bearing,...