GENEVA, March 8 -- CHINA COAL TECHNOLOGY & ENGINEERING GROUP CHONGQING RESEARCH INSTITUTE CO. LTD (No.6, Kecheng RoadJiulongpo District, Chongqing 400039), 中煤科工集团重庆研究院有限公司 (中国重庆市九龙坡区科城路6号) filed a patent application (PCT/CN2023/120217) for "COMPOSITE DRILLING SYSTEM PROVIDED WITH TWO ROTATION DRIVING DEVICES AND CONTROL METHOD THEREFOR" on Sep 21, 2023. With publication no. WO/2025/043789, the details related to the patent application was published on Mar 06, 2025.
Notably, the patent application was submitted under the International Patent Classi...