US Patent Issued to YANGTZE UNIVERSITY on April 29 for "Polymer viscosity reducer for water-based drilling fluid and preparation method thereof" (Chinese Inventor)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,583, issued on April 29, was assigned to YANGTZE UNIVERSITY (Jingzhou, China).

"Polymer viscosity reducer for water-based drilling fluid and preparation method thereof" was invented by Fuchang You (Jingzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a polymer viscosity reducer for a water-based drilling fluid and a preparation method thereof. The polymer viscosity reducer for the water-based drilling fluid is prepared from raw materials including, in parts by mass: 100 parts to 150 parts of water, 30 parts to 50 parts of acrylic acid, 10 parts to 20 parts of maleic anhydride, 40 parts to 60 parts of allyl polyethylene glycol, ...