Patents by Inventor Shigui JIANG

Shigui JIANG 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).

  • Hybrid bit with roller cones having inserts
    Patent number: 11326402
    Abstract: A hybrid bit with roller cones having inserts is disclosed, includes a bit body, blades and roller cones. All the fixed cutting elements at the inner cone section, nose section and shoulder section of blades herein constitutes two sets of corresponding fixed cutting elements respectively, forming two profile envelopes of fixed cutting elements at least in the interval at the nose section and shoulder section, the two profile envelopes of fixed cutting elements are spaced at high and low intervals at the nose section and shoulder section, forming two stages of cutting by fixed cutting elements; and the cutting position of the cone insert mainly corresponds to the nose section and shoulder section of blades, the outermost cutting profile envelope of cone inserts formed by all or part of cutting elements on cones herein is higher than the outermost cutting profile envelope of fixed cutting elements, forming the third stage of cutting.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: May 10, 2022
    Assignee: KINGDREAM PUBLIC LIMITED COMPANY
    Inventors: Guanfu Tu, Qiang Liu, Xiaobo Liu, Shigui Jiang
  • HYBRID BIT WITH ROLLER CONES HAVING INSERTS
    Publication number: 20210087886
    Abstract: A hybrid bit with roller cones having inserts is disclosed, includes a bit body, blades and roller cones. All the fixed cutting elements at the inner cone section, nose section and shoulder section of blades herein constitutes two sets of corresponding fixed cutting elements respectively, forming two profile envelopes of fixed cutting elements at least in the interval at the nose section and shoulder section, the two profile envelopes of fixed cutting elements are spaced at high and low intervals at the nose section and shoulder section, forming two stages of cutting by fixed cutting elements; and the cutting position of the cone insert mainly corresponds to the nose section and shoulder section of blades, the outermost cutting profile envelope of cone inserts formed by all or part of cutting elements on cones herein is higher than the outermost cutting profile envelope of fixed cutting elements, forming the third stage of cutting.
    Type: Application
    Filed: November 1, 2018
    Publication date: March 25, 2021
    Inventors: Guanfu TU, Qiang LIU, Quang LIU, Xiaobo LIU, Shigui JIANG