Patents Assigned to Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC CORP.
  • Publication number: 20190127624
    Abstract: Modified asphalt particles contain asphalt and a modifier. The modifier comprises poly-sulfur and free sulfur. The sulfur element accounts for 10-40 weight percent of the total amount of the modified asphalt particles, and the poly-sulfur accounts for 30-70 weight percent of the total amount of the sulfur element. The total particle size of the modified asphalt particle is smaller than or equal to 150 ?m. The modified asphalt particles have an excellent high temperature performance, and can be used for preparing drilling fluids. Water-in-oil based drilling fluid obtained from the modified asphalt particles has low plastic viscosity, high dynamic shear force, high dynamic plastic ratio, and high emulsion-breaking voltage, and improves the high temperature resistance and cutting carrying capability of a system.
    Type: Application
    Filed: November 1, 2016
    Publication date: May 2, 2019
    Applicants: China Petroleum & Chemical Corporation, Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC CORP.
    Inventors: Li FU, Jiaohe GUO, Hanrong YAO, Shuhua LIU, Jianfeng ZHANG