US Patent Issued to Southwest Petroleum University on Nov. 18 for "Low-molecular-weight composite contamination-resistant additive for well cementing" (Chinese Inventors)

ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,483, issued on Nov. 18, was assigned to Southwest Petroleum University (Chengdu, China).

"Low-molecular-weight composite contamination-resistant additive for well cementing" was invented by Sheng Huang (Chengdu, China), Yuan Gao (Chengdu, China), Zaoyuan Li (Chengdu, China), Donghua Su (Chengdu, China), Baowen Zhang (Chengdu, China) and Can Zhou (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a low-molecular-weight composite contamination-resistant additive for well cementing, which includes: 60-85 parts by mass of low-molecular-weight phosphonic acid polymer solution and 15-40 parts by mass of silicate solution. The sili...