Patents by Inventor Bradley DUNBAR

Bradley DUNBAR 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).

  • Drilling system drag member for simultaneous drilling and reaming
    Patent number: 10400571
    Abstract: Drilling dysfunction during simultaneous down-hole drilling and reaming is reduced by obtaining an indication of force on cutters of a reamer, determining whether or not the indication indicates an excessive force, and upon determining that the indication indicates an excessive force, extending drag elements from the bottom hole assembly to contact a wall of the well bore and reduce the force on the cutters of the reamer. The indication of force on the cutters can be obtained by sensing the weight on the drill bit, and the determination can be done by comparing the indicated weight on the drill bit to a first threshold and a second threshold.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: September 3, 2019
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: John Gerard Evans, Bradley Dunbar
  • DRILLING SYSTEM DRAG MEMBER FOR SIMULTANEOUS DRILLING AND REAMING
    Publication number: 20180163480
    Abstract: Drilling dysfunction during simultaneous down-hole drilling and reaming is reduced by obtaining an indication of force on cutters of a reamer, determining whether or not the indication indicates an excessive force, and upon determining that the indication indicates an excessive force, extending drag elements from the bottom hole assembly to contact a wall of the well bore and reduce the force on the cutters of the reamer. The indication of force on the cutters can be obtained by sensing the weight on the drill bit, and the determination can be done by comparing the indicated weight on the drill bit to a first threshold and a second threshold.
    Type: Application
    Filed: July 2, 2015
    Publication date: June 14, 2018
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: John Gerard EVANS, Bradley DUNBAR