Patents by Inventor Branko Calic

Branko Calic 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).

  • DOWNHOLE DROP PLUGS, DOWNHOLE VALVES, FRAC TOOLS, AND RELATED METHODS OF USE
    Publication number: 20200182013
    Abstract: Downhole drop plugs, frac sleeves, and downhole plug-operated valves. The drop plugs may incorporate a ring part and a rod part. The valves may incorporate a bypass to accommodate material that gets stuck in the valve on flowback. The valves may incorporate a compound seat that passes a first ball of a first size and seats a second ball of the first size. Locking seats, dissolvable balls, and dissolvable mandrels are illustrated and discussed as well.
    Type: Application
    Filed: November 8, 2019
    Publication date: June 11, 2020
    Inventors: Jozeph Robert Marcin, Branko Calic
  • Downhole drop plugs, downhole valves, frac tools, and related methods of use
    Patent number: 10472927
    Abstract: Downhole drop plugs, frac sleeves, and downhole plug-operated valves. The drop plugs may incorporate a ring part and a rod part. The valves may incorporate a bypass to accommodate material that gets stuck in the valve on flowback. The valves may incorporate a compound seat that passes a first ball of a first size and seats a second ball of the first size. Locking seats, dissolvable balls, and dissolvable mandrels are illustrated and discussed as well.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: November 12, 2019
    Assignee: Vanguard Completions Ltd.
    Inventors: Jozeph Robert Marcin, Branko Calic
  • DOWNHOLE DROP PLUGS, DOWNHOLE VALVES, FRAC TOOLS, AND RELATED METHODS OF USE
    Publication number: 20170175487
    Abstract: Downhole drop plugs, frac sleeves, and downhole plug-operated valves. The drop plugs may incorporate a ring part and a rod part. The valves may incorporate a bypass to accommodate material that gets stuck in the valve on flowback. The valves may incorporate a compound seat that passes a first ball of a first size and seats a second ball of the first size. Locking seats, dissolvable balls, and dissolvable mandrels are illustrated and discussed as well.
    Type: Application
    Filed: November 15, 2016
    Publication date: June 22, 2017
    Inventors: Jozeph Robert Marcin, Branko Calic