US Patent Issued to CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING on June 24 for "Coal mining system and method of dual circulation drilling with mechanical reaming and abrasive jet" (Chinese Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,721, issued on June 24, was assigned to CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING (Beijing).

"Coal mining system and method of dual circulation drilling with mechanical reaming and abrasive jet" was invented by Yifan Zeng (Beijing), Donghui Yang (Beijing), Qiang Wu (Beijing), Zilong Yuan (Beijing), Hao Li (Beijing), Junhao Ren (Beijing), Zeyang Liu (Beijing) and Jia Zhao (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a coal mining system and a coal mining method. The coal mining system includes: a mechanical coal breaking module, an air lift reverse circulation module, a jet coal breaking module, and a coal-air-water ...