Patents by Inventor Yonggui Liu

Yonggui Liu 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).

  • Shale inhibitors used in the water-based fluid for shale formation
    Patent number: 10787602
    Abstract: A shale inhibitor to improve the application of water-based drilling fluid in the shale formation rock is provided. An embodiment of the shale inhibitor is the reaction product of an amine, such as triethanolamine, and epichlorohydrin in water solution. Another embodiment of the shale inhibitor is the reaction product of triethanolamine, epichlorohydrin, and hypophosphorous acid. It is highly effective and has a better performance than most commercial products on preventing the disintegration and swelling of the shale formation.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 29, 2020
    Assignees: CNPC USA Corporation, Beijing Huamei, Inc.
    Inventors: Chun Zhou, Fuchen Liu, Yonggui Liu, Xingdong Yu
  • SHALE INHIBITORS USED IN THE WATER-BASED FLUID FOR SHALE FORMATION
    Publication number: 20190382642
    Abstract: A shale inhibitor to improve the application of water-based drilling fluid in the shale formation rock is provided. An embodiment of the shale inhibitor is the reaction product of an amine, such as triethanolamine, and epichlorihydrin in water solution. Another embodiment of the shale inhibitor is the reaction product of triethanolamine, epichlorihydrin, and hypophosphorous acid. It is highly effective and has a better performance than most commercial products on preventing the disintegration and swelling of the shale formation.
    Type: Application
    Filed: June 15, 2018
    Publication date: December 19, 2019
    Applicants: CNPC USA CORPORATION, BEIJING HUAMEI INC. CNPC
    Inventors: Chun Zhou, Fuchen Liu, Yonggui Liu, Xingdong Yu