Patents by Inventor Hengchun Zhang

Hengchun 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).

  • Multifunctional directional wireline core drilling device
    Patent number: 11255149
    Abstract: A multifunctional directional wireline core drilling device includes an outer assembly, an inner assembly, a core unjamming mechanism, and a directional coring mechanism. According to the present disclosure, wireline core drilling can be fulfilled; in addition, the directional coring mechanism can truly restore the strike and azimuth of a stratum facture by obtaining a core with an azimuth. By controlling the flow of drilling fluid during drilling, the core unjamming mechanism can effectively reduce core abrasion, generated due to jamming in the core barrel, during drilling, so that the core recovery of a fractured stratum prone to causing core jamming and the drilling efficiency are greatly improved.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: February 22, 2022
    Assignee: Institute of Exploration Techniques, Chinese Academy of Geological Sciences
    Inventors: Longlong Cao, Hengchun Zhang, Wenshi Wang, Jia Yan, Jie Xu