Patents by Inventor Fengliang Zhao

Fengliang Zhao 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).

  • Pressure compensation device with accumulator group for controlled pressure drilling
    Patent number: 12000222
    Abstract: A pressure compensation device with an accumulator group for controlled pressure drilling includes an electrical flat valve, a check valve, an accumulator group, a flanged pup joint and a support base. The electrical flat valve is connected to the check valve and is mounted on a top surface of the support base. The accumulator group mounted on the whole support base is a pre-storage pressure compensation device for controlled pressure drilling, and is located at a downstream position of the check valve. The liquid inlet end of the accumulator group is connected to the check valve, and the liquid discharge end is connected to the flanged pup joint.
    Type: Grant
    Filed: September 7, 2020
    Date of Patent: June 4, 2024
    Assignees: CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED, CHINA NATIONAL PETROLEUM CORPORATION, CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Jinshan Ma, Baojiang Sun, Jintao Qi, Liming Wei, Fengliang Xi, Gang Liu, Zhiyuan Wang, Xing Wang, Haichao Xu, Long Ma, Jiacui Luan, Lei Chen, Guodong Chen, Yuanlin Zhao, Zisen Yang, Qiang Huang, Menglei Ma, Xiantao Meng, Hongyin Wei
  • Flexible stent-graft
    Patent number: 9056000
    Abstract: A stent graft (5) comprises a tubular graft member (4), and a plurality of sloping stent members (3) substantially coaxial with and coupled to the tubular graft member (4). Each of the sloping stent members (3) comprises multiple uneven apexes characterizing a round tubular configuration with a distal end and a proximal end disposed about a longitudinal axis. The distal apexes of the sloping stent member (3) are arranged in substantially the same plane substantially horizontal to the longitudinal axis of the sloping stent member and the proximal apexes are arranged in a sloping plane oblique to the longitudinal axis.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: June 16, 2015
    Assignee: MicroPort Endovascular (Shanghai) Co., Ltd.
    Inventors: Qiyi Luo, Honglin Nie, Qing Zhu, Weiwen Sheng, Fengliang Zhao, Hui He, Jie Li, Yan-bin Gao
  • Flexible Stent-Graft
    Publication number: 20080195191
    Abstract: A stent graft (5) comprises a tubular graft member (4), and a plurality of sloping stent members (3) substantially coaxial with and coupled to the tubular graft member (4). Each of the sloping stent members (3) comprises multiple uneven apexes characterizing a round tubular configuration with a distal end and a proximal end disposed about a longitudinal axis. The distal apexes of the sloping stent member (3) are arranged in substantially the same plane substantially horizontal to the longitudinal axis of the sloping stent member and the proximal apexes are arranged in a sloping plane oblique to the longitudinal axis.
    Type: Application
    Filed: May 23, 2006
    Publication date: August 14, 2008
    Inventors: Qiyi Luo, Honglin Nie, Qing Zhu, Weiwen Sheng, Fengliang Zhao, Hui He, Jie Li, Yan-bin Gao