Patents by Inventor Liu Xi Lin

Liu Xi Lin 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).

  • Pinned structural connection using a pin and plug arrangement
    Patent number: 8813436
    Abstract: Generally, the subject matter disclosed herein is directed to, among other things, systems and methods for making up pivotably pinned structural connections that may be used for erecting drilling rig masts. One illustrative system includes a drilling rig mast having at least one support leg, a drilling rig mast support having at least one mast support shoe, and a pinned connection between the at least one support leg and the at least one mast support shoe. Additionally, the pinned connection of the disclosed system includes a pin, an oversized hole having at least a first hole portion, and a removable plug that is adapted to be inserted into the oversized hole, wherein the removable plug has at least a first plug surface portion, and wherein the first hole portion and the first plug surface portion define at least part of a pin hole that is adapted to receive the pin.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: August 26, 2014
    Assignee: National Oilwell Varco, L.P.
    Inventors: Robert B. Donnally, Liu Xi Lin, Guo Hou
  • PINNED STRUCTURAL CONNECTION USING A PIN AND PLUG ARRANGEMENT
    Publication number: 20120066999
    Abstract: Generally, the subject matter disclosed herein is directed to, among other things, systems and methods for making up pivotably pinned structural connections that may be used for erecting drilling rig masts. One illustrative system includes a drilling rig mast having at least one support leg, a drilling rig mast support having at least one mast support shoe, and a pinned connection between the at least one support leg and the at least one mast support shoe. Additionally, the pinned connection of the disclosed system includes a pin, an oversized hole having at least a first hole portion, and a removable plug that is adapted to be inserted into the oversized hole, wherein the removable plug has at least a first plug surface portion, and wherein the first hole portion and the first plug surface portion define at least part of a pin hole that is adapted to receive the pin.
    Type: Application
    Filed: August 31, 2011
    Publication date: March 22, 2012
    Inventors: Robert B. Donnally, Liu Xi Lin, Guo Hou