Patents by Inventor Chongfeng ZHANG

Chongfeng ZHANG 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).

  • Well cementing method for improving well cementing quality by controlling hydration heat of cement slurry
    Patent number: 11926787
    Abstract: A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: March 12, 2024
    Assignees: PetroChina Company Limited, CNPC Engineering Technology R&D Company Limited
    Inventors: Shuoqiong Liu, Hua Zhang, Jianzhou Jin, Ming Xu, Yongjin Yu, Fengzhong Qi, Congfeng Qu, Hong Yue, Youcheng Zheng, Wei Li, Yong Ma, Youzhi Zheng, Zhao Huang, Jinping Yuan, Zhiwei Ding, Chongfeng Zhou, Chi Zhang, Zishuai Liu, Hongfei Ji, Yuchao Guo, Xiujian Xia, Yong Li, Jiyun Shen, Huiting Liu, Yusi Feng, Bin Lyu
  • Spacecraft docking system and method
    Patent number: 11053031
    Abstract: A spacecraft docking system and method thereof are provided. The system comprises an active docking device and a passive docking device. The active docking device comprises an active docking ring and a docking frame. The active docking device further comprises three sets of buffer mechanisms, each set of the buffer mechanisms comprises a main buffer, two screw nut assemblies, and a self-difference buffer. An upper end and a lower end of the screw nut assembly are movably connected to the active docking ring and the docking frame, respectively. The two screw nut assemblies in each set are simultaneously driven and stretched by the main buffer, being also connected to each other through the self-difference buffer, and able to be relatively adjusted and stretched through the self-difference buffer.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: July 6, 2021
    Assignee: AEROSPACE SYSTEM ENGINEERING SHANGHAI
    Inventors: Zhi Liu, Chongfeng Zhang, Zongxiang Jin, Junwei Shi, Zhe Xie, Xueping Hu
  • SPACECRAFT DOCKING SYSTEM AND METHOD
    Publication number: 20200102102
    Abstract: A spacecraft docking system and method thereof are provided. The system comprises an active docking device and a passive docking device. The active docking device comprises an active docking ring and a docking frame. The active docking device further comprises three sets of buffer mechanisms, each set of the buffer mechanisms comprises a main buffer, two screw nut assemblies, and a self-difference buffer. An upper end and a lower end of the screw nut assembly are movably connected to the active docking ring and the docking frame, respectively. The two screw nut assemblies in each set are simultaneously driven and stretched by the main buffer, being also connected to each other through the self-difference buffer, and able to be relatively adjusted and stretched through the self-difference buffer.
    Type: Application
    Filed: June 13, 2017
    Publication date: April 2, 2020
    Inventors: Zhi LIU, Chongfeng ZHANG, Zongxiang JIN, Junwei SHI, Zhe XIE, Xueping HU