Patents by Inventor Changqiang Tang

Changqiang Tang 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).

  • High-temperature retarder suitable for oil and gas well cementation, preparation method thereof and cementing slurry
    Patent number: 10858571
    Abstract: The present disclosure relates to a high-temperature retarder suitable for oil and gas well cementation, a preparation method thereof and a cementing slurry.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: December 8, 2020
    Assignees: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), CHENGDU OMAX PETROLEUM TECHNOLOGY CO., LTD
    Inventors: Chengwen Wang, Yucheng Xue, Wei Zhou, Ruihe Wang, Jinsheng Sun, Yong Li, Changqiang Tang
  • HIGH-TEMPERATURE RETARDER SUITABLE FOR OIL AND GAS WELL CEMENTATION, PREPARATION METHOD THEREOF AND CEMENTING SLURRY
    Publication number: 20200239760
    Abstract: The present disclosure relates to a high-temperature retarder suitable for oil and gas well cementation, a preparation method thereof and a cementing slurry.
    Type: Application
    Filed: January 27, 2020
    Publication date: July 30, 2020
    Applicants: China University of Petroleum (East China), Chengdu OMAX Petroleum Technology Co., Ltd
    Inventors: Chengwen Wang, Yucheng Xue, Wei Zhou, Ruihe Wang, Jinsheng Sun, Yong Li, Changqiang Tang