Patents by Inventor Laju Han

Laju Han 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).

  • Publication number: 20180223599
    Abstract: A static push-the-bit rotary guiding device includes: a mandrel having a central passage, wherein a circumferential groove is provided on an outer wall of the mandrel; a sleeve, which is sleeved in the circumferential groove and able to rotate independently; and a clutch, for cutting off or transferring a power from the mandrel to the sleeve. When it is unnecessary for the static push-the-bit rotary guiding device to provide a deviating force in a steady inclined section, a vertical section and a horizontal section, a rotational inertia and an interior energy storage of the rotary guiding device are not decreased, which is beneficial to highly-efficient and stable drilling of a downstream drill bit.
    Type: Application
    Filed: September 16, 2015
    Publication date: August 9, 2018
    Inventors: Jinzhou Yang, Hongbing Xiao, Zhonghua Wu, Jieran Zhu, Laju Han, Zuohui Li, Yanjun Zhou, Zhijun Tang