Patents by Inventor Chenglin FU

Chenglin FU 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).

  • Patent number: 10801282
    Abstract: A screw drill bypass valve comprising a valve body, the valve body is internally provided with a first-level valve core and a second-level valve core, a first-level spring is arranged between the first-level valve core and the second-level valve core, a second-level spring is arranged between the second-level valve core and a valve seat, and a rigidity of the second-level spring is greater than that of the first-level spring; the first-level valve core is provided with an inner bypass hole, the valve body is provided with an outer bypass hole, and the inner bypass hole is conducted with the outer bypass hole when a flowing pressure within a fluid channel of drilling fluid disappears; the second-level valve core is provided with an inner diversion hole, the valve body is provided with an outer diversion hole.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: October 13, 2020
    Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Yucai Shi, Zhibin Fan, Zhichuan Guan, Yongwang Liu, Weixing Yang, Zhixiang Teng, Chenglin Fu, Zaiqiang Miao
  • Publication number: 20190368289
    Abstract: Disclosed are a screw drill bypass valve with a large displacement diversion function and a method of using same.
    Type: Application
    Filed: February 22, 2018
    Publication date: December 5, 2019
    Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Yucai SHI, Zhibin FAN, Zhichuan GUAN, Yongwang LIU, Weixing YANG, Zhixiang TENG, Chenglin FU, Zaiqiang MIAO