ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,749, issued on Nov. 11, was assigned to Shineon Environments Technology Services Co. Ltd. (Chengdu, China).

"Flocculant for treating fracturing flowback fluid and preparation method therefor" was invented by Tao Zhang (Chengdu, China), Guanjun Wang (Chengdu, China), Fuyou Huang (Chengdu, China), Sheng Zhou (Chengdu, China), Xiongying He (Chengdu, China), Weisheng Zhao (Chengdu, China) and Jing Luo (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a flocculant for treating fracturing flowback fluid and a preparation method therefor, which relate to oilfield sewage treatment. The method includes: in parts by weight, dissolvi...