US Patent Issued to China University of Petroleum (East China) on April 8 for "High density environmentally friendly polymer water-based drilling fluid with resistance to 240deg C. and saturated salts, preparation method therefor and use thereof" (Chinese Inventors)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,269,985, issued on April 8, was assigned to China University of Petroleum (East China) (Qingdao, China).

"High density environmentally friendly polymer water-based drilling fluid with resistance to 240deg C. and saturated salts, preparation method therefor and use thereof" was invented by Jinsheng Sun (Qingdao, China), Jingping Liu (Qingdao, China), Kaihe Lv (Qingdao, China), Meichun Li (Qingdao, China), Jiafeng Jin (Qingdao, China), Jintang Wang (Qingdao, China), Yuanwei Sun (Qingdao, China) and Taifeng Zhang (Qingdao, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to the technical field of drilling fluid, and discl...