Patents by Inventor Feng Feng Xiao

Feng Feng Xiao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Crosslinked high molecular weight polymers for use in water-based drilling fluids
    Patent number: 10072197
    Abstract: Crosslinked high molecular weight acrylamide and 2-acrylamido-2-methylpropane sulfonic acid copolymers in inverse emulsion form act as inhibitive and encapsulating agents for water-based drilling fluids system. The crosslinked copolymer are particularly useful for high salt, high density drilling fluids in high temperature and high pressure applications.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: September 11, 2018
    Assignees: CNPC USA Corporation, CNPC Chuanqing Drilling Engineering Company Limited
    Inventors: Meng Lu, Guang Chang Ma, Burhan Hoxha, Feng Feng Xiao
  • CROSSLINKED HIGH MOLECULAR WEIGHT POLYMERS FOR USE IN WATER-BASED DRILLING FLUIDS
    Publication number: 20170101573
    Abstract: Crosslinked high molecular weight acrylamide and 2-acrylamido-2-methylpropane sulfonic acid copolymers in inverse emulsion form act as inhibitive and encapsulating agents for water-based drilling fluids system. The crosslinked copolymer are particularly useful for high salt, high density drilling fluids in high temperature and high pressure applications.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 13, 2017
    Applicants: CNPC USA Corporation, CNPC Chuanqing Drilling Engineering Company Limited
    Inventors: Meng Lu, Guang Chang Ma, Burhan Hoxha, Feng Feng Xiao