Patents by Inventor Chuan CAO

Chuan CAO 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).

  • Casing windowing method and tool using coiled tubing
    Patent number: 10450801
    Abstract: The present disclosure provides a casing windowing method and tool using coiled tubing; the windowing method comprises the steps of: a) preparing a borehole, including drifting a casing, and scraping an inner wall of the casing; b) hanging a positioning assembly in the casing, including seating the positioning assembly at a wellhead of the borehole, and after the positioning assembly is put down to a predetermined position in the casing, hanging a hanger of the positioning assembly at the inner wall of the casing; c) fixing a whipstock at a down-hole of the borehole, including seating the whipstock at the wellhead, and inserting a guiding assembly of the whipstock into the hanger so that an orientation of a window inclined plane of the guiding assembly meets a requirement of window orientation; and d) windowing the casing, including seating a tapered windowing mill at the wellhead, and after the tapered windowing mill is put down to the window inclined plane of the guiding assembly, starting the tapered windo
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: October 22, 2019
    Assignees: CHINA NATIONAL PETROLEUM CORPORATION, CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITED
    Inventors: Yanping Zhang, Xuehui Li, Qianli Wu, Yongliang Yu, Chuan Cao, Mingjie Lv, Tao Jia, Yi Yang
  • CASING WINDOWING METHOD AND TOOL USING COILED TUBING
    Publication number: 20170152718
    Abstract: The present disclosure provides a casing windowing method and tool using coiled tubing; the windowing method comprises the steps of: a) preparing a borehole, including drifting a casing, and scraping an inner wall of the casing; b) hanging a positioning assembly in the casing, including seating the positioning assembly at a wellhead of the borehole, and after the positioning assembly is put down to a predetermined position in the casing, hanging a hanger of the positioning assembly at the inner wall of the casing; c) fixing a whipstock at a down-hole of the borehole, including seating the whipstock at the wellhead, and inserting a guiding assembly of the whipstock into the hanger so that an orientation of a window inclined plane of the guiding assembly meets a requirement of window orientation; and d) windowing the casing, including seating a tapered windowing mill at the wellhead, and after the tapered windowing mill is put down to the window inclined plane of the guiding assembly, starting the tapered windo
    Type: Application
    Filed: November 29, 2016
    Publication date: June 1, 2017
    Inventors: Yanping ZHANG, Xuehui LI, Qianli WU, Yongliang YU, Chuan CAO, Mingjie LV, Tao JIA, Yi YANG