Patents by Inventor Youzhi Xu

Youzhi Xu 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
  • Wireless communication method and system with collision avoidance protocol
    Patent number: 9036612
    Abstract: A method for providing wireless communication between a source node and a destination node in a wireless network wherein the wireless network uses a time division multiple access (TDMA) protocol. One or more dedicated TDMA transaction timeslots are arranged in a superframe. The superframe includes at least one dedicated transaction slot forming a hybrid protocol with two or more shared transaction slots per superframe. The method is of particular advantage when practised with a WirelessHART protocol wireless sensor network and when used for monitoring and control equipment and processes in an industrial installation. A computer program, and a wireless node and a wireless network using the inventive method are also disclosed.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: May 19, 2015
    Assignee: ABB Research Ltd.
    Inventors: Mikael Gidlund, Dong Yang, Wei Shen, Youzhi Xu, Tingting Zhang
  • Wireless Communication Method And System With Collision Avoidance Protocol
    Publication number: 20130142180
    Abstract: A method for providing wireless communication between a source node and a destination node in a wireless network wherein the wireless network uses a time division multiple access (TDMA) protocol. One or more dedicated TDMA transaction timeslots are arranged in a superframe. The superframe includes at least one dedicated transaction slot forming a hybrid protocol with two or more shared transaction slots per superframe. The method is of particular advantage when practised with a WirelessHART protocol wireless sensor network and when used for monitoring and control equipment and processes in an industrial installation. A computer program, and a wireless node and a wireless network using the inventive method are also disclosed.
    Type: Application
    Filed: January 28, 2013
    Publication date: June 6, 2013
    Inventors: Mikael Gidlund, Dong Yang, Wei Shen, Youzhi Xu, Tingting Zhang