Patents by Inventor Minglue Fan

Minglue Fan 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).

  • Downhole oil level detection device
    Patent number: 11788405
    Abstract: A downhole oil level detection device includes a mounting housing (1) and a balance cylinder (2) installed on the mounting housing (1). The balance cylinder (2) includes a cylinder body (25) and a moving piston (21), a piston tension spring (22), a moving rod (23), a moving rod compression spring (24) and a displacement sensor (3) installed in the cylinder body (25). One end of the piston tension spring (22) is fixed to one end of the cylinder body (25), the other end thereof is connected to one side of the moving piston (21); one side of the moving piston (21) is also connected to one end of the moving rod compression spring (24), the other end of the moving rod compression spring (24) is connected to one end of the moving rod (23), the other end of the moving rod (23) is provided with the displacement sensor (3).
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: October 17, 2023
    Assignee: China Oilfield Services Limited
    Inventors: Zhibin Tian, Zanqing Wei, Lin Huang, Xiaoqiang Du, Yongren Feng, Bin Gao, Peng Sun, Yong Jiang, Minglue Fan, Shiwei Zong
  • DOWNHOLE OIL LEVEL DETECTION DEVICE
    Publication number: 20220154573
    Abstract: A downhole oil level detection device includes a mounting housing (1) and a balance cylinder (2) installed on the mounting housing (1). The balance cylinder (2) includes a cylinder body (25) and a moving piston (21), a piston tension spring (22), a moving rod (23), a moving rod compression spring (24) and a displacement sensor (3) installed in the cylinder body (25). One end of the piston tension spring (22) is fixed to one end of the cylinder body (25), the other end thereof is connected to one side of the moving piston (21); one side of the moving piston (21) is also connected to one end of the moving rod compression spring (24), the other end of the moving rod compression spring (24) is connected to one end of the moving rod (23), the other end of the moving rod (23) is provided with the displacement sensor (3).
    Type: Application
    Filed: February 14, 2020
    Publication date: May 19, 2022
    Inventors: Zhibin Tian, Zanqing Wei, Lin Huang, Bin Gao, Xiaoqiang Du, Yongren Feng, Peng Sun, Yong Jiang, Minglue Fan, Shiwei Zong