Patents by Inventor Stephen Ray Stafford

Stephen Ray Stafford 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).

  • Cold rolling devices and cold rolled rotary shouldered connection threads
    Patent number: 11389858
    Abstract: A device for cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: July 19, 2022
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Rakesh Singh, Ke Ken Li, Michael Hui Du, Fei Song, Stephen Ray Stafford, Anthony Louis Williams Collins, Keith Moriarty, Doyle Brinegar
  • COLD ROLLING DEVICES AND COLD ROLLED ROTARY SHOULDERED CONNECTION THREADS
    Publication number: 20190060979
    Abstract: A device for cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved.
    Type: Application
    Filed: October 29, 2018
    Publication date: February 28, 2019
    Inventors: Rakesh Singh, Ke Ken Li, Michael Hui Du, Fei Song, Stephen Ray Stafford, Anthony Louis Williams Collins, Keith Moriarty, Doyle Brinegar
  • Cold rolling devices and cold rolled rotary shouldered connection threads
    Patent number: 10160033
    Abstract: A method of cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved. The thread may be cold rolled with a wheel tip having an elliptical profile.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: December 25, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Rakesh Singh, Ke Ken Li, Michael Hui Du, Fei Song, Stephen Ray Stafford, Anthony Louis William Collins, Keith Moriarty, Doyle Brinegar
  • Cold Rolling Devices and Colled Rolled Rotary Shouldered Connection Threads
    Publication number: 20150367402
    Abstract: A method of cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved. The thread may be cold rolled with a wheel tip having an elliptical profile.
    Type: Application
    Filed: June 11, 2015
    Publication date: December 24, 2015
    Inventors: Rakesh Singh, Ke Ken Li, Michael Hui Du, Fei Song, Stephen Ray Stafford, Anthony Louis William Collins, Keith Moriarty