Patents by Inventor Tjandra Sukendro

Tjandra Sukendro 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 rolling cone drill bits and methods for manufacturing same
    Patent number: 9840874
    Abstract: A rolling cone drill bit for drilling a borehole in earthen formations includes a bit body having a bit axis. In addition, the rolling cone drill bit includes a rolling cone cutter mounted on the bit body and having a cone axis of rotation. The cone cutter includes a cone body, a plurality of teeth arranged in a first inner row, and a plurality of inserts. Each insert is disposed within one tooth in the first inner row.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: December 12, 2017
    Assignee: National Oilwell DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro
  • Hybrid Rolling Cone Drill Bits and Methods for Manufacturing Same
    Publication number: 20160108681
    Abstract: A rolling cone drill bit for drilling a borehole in earthen formations includes a bit body having a bit axis. In addition, the rolling cone drill bit includes a rolling cone cutter mounted on the bit body and having a cone axis of rotation. The cone cutter includes a cone body, a plurality of teeth arranged in a first inner row, and a plurality of inserts. Each insert is disposed within one tooth in the first inner row.
    Type: Application
    Filed: December 31, 2015
    Publication date: April 21, 2016
    Applicant: National Oilwell DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro
  • Hybrid rolling cone drill bits and methods for manufacturing same
    Patent number: 9249628
    Abstract: A rolling cone drill bit for drilling a borehole in earthen formations includes a bit body having a bit axis. In addition, the rolling cone drill bit includes a rolling cone cutter mounted on the bit body and having a cone axis of rotation. The cone cutter includes a cone body, a plurality of teeth arranged in a first inner row, and a plurality of inserts. Each insert is disposed within one tooth in the first inner row.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: February 2, 2016
    Assignee: National Oilwell DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro
  • Apparatus and method for retaining inserts of a rolling cone drill bit
    Patent number: 9140071
    Abstract: An insert for a rolling cone drill bit includes a base portion having a central axis. The base portion is configured to be seated in a mating socket in a cone cutter of the rolling cone drill bit. In addition, the insert includes a cutting portion extending from the base portion. The base portion has a radially outer surface including a non-cylindrical axial retention feature configured to prevent the insert from moving axially out of the mating socket or a non-cylindrical torque holding feature configured to prevent the insert from rotating relative to the cone cutter.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: September 22, 2015
    Assignee: NATIONAL OILWELL DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro
  • APPARATUS AND METHOD FOR RETAINING INSERTS OF A ROLLING CONE DRILL BIT
    Publication number: 20140144709
    Abstract: An insert for a rolling cone drill bit includes a base portion having a central axis. The base portion is configured to be seated in a mating socket in a cone cutter of the rolling cone drill bit. In addition, the insert includes a cutting portion extending from the base portion. The base portion has a radially outer surface including a non-cylindrical axial retention feature configured to prevent the insert from moving axially out of the mating socket or a non-cylindrical torque holding feature configured to prevent the insert from rotating relative to the cone cutter.
    Type: Application
    Filed: November 26, 2012
    Publication date: May 29, 2014
    Applicant: National Oilwell DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro
  • Hybrid Rolling Cone Drill Bits and Methods for Manufacturing Same
    Publication number: 20140138161
    Abstract: A rolling cone drill bit for drilling a borehole in earthen formations includes a bit body having a bit axis. In addition, the rolling cone drill bit includes a rolling cone cutter mounted on the bit body and having a cone axis of rotation. The cone cutter includes a cone body, a plurality of teeth arranged in a first inner row, and a plurality of inserts. Each insert is disposed within one tooth in the first inner row.
    Type: Application
    Filed: November 16, 2012
    Publication date: May 22, 2014
    Applicant: NATIONAL OILWELL DHT, L.P.
    Inventors: Thang Vo, Tjandra Sukendro