Patents by Inventor Stefan Butuc

Stefan Butuc 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).

  • Publication number: 20210171724
    Abstract: A rubber compound including an azide cured elastomeric base, wherein the rubber compound is used to form an elastomeric component of a downhole tool. The rubber compound is comprised of at least one elastomeric component and at least one diazide curing agent.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 10, 2021
    Inventors: Stefan Butuc, Steve Kyker, Victoria Perez, Mike Salerno
  • Patent number: 8944789
    Abstract: A progressive cavity type motor or pump including a stator insert with a reinforcing agent dispersed in a manner to improve properties of the stator insert. The reinforcing agent may be a fiber, nanotube, metal, ceramic, or polymer. A dispersing agent may be used to obtain a homogenous distribution. A magnetic reinforcing agent may be incorporated into a stator insert. The stator insert is subjected to a magnetic field to orient the magnetic reinforcing agent in a particular orientation. The magnetic field may also reposition the magnetic reinforcing agent within the stator insert. The stator insert may be formed by injection molding, transfer, or compression molding among other methods.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: February 3, 2015
    Assignee: National Oilwell Varco, L.P.
    Inventors: Stefan Butuc, Jiinjen A. Sue, Harold A. Sreshta, Joshua A. Sicilian
  • Publication number: 20120148432
    Abstract: A progressive cavity type motor or pump including a stator insert with a reinforcing agent dispersed in a manner to improve properties of the stator insert. The reinforcing agent may be a fiber, nanotube, metal, ceramic, or polymer. A dispersing agent may be used to obtain a homogenous distribution. A magnetic reinforcing agent may be incorporated into a stator insert. The stator insert is subjected to a magnetic field to orient the magnetic reinforcing agent in a particular orientation. The magnetic field may also reposition the magnetic reinforcing agent within the stator insert. The stator insert may be formed by injection molding, transfer, or compression molding among other methods.
    Type: Application
    Filed: August 22, 2011
    Publication date: June 14, 2012
    Applicant: NATIONAL OILWELL VARCO, L.P.
    Inventors: Stefan BUTUC, Jiinjen A. SUE, Harold A. SRESHTA, Joshua A. SICILIAN
  • Patent number: 8176933
    Abstract: A packing unit for a blowout preventer includes an elastomeric, annular body configured to be disposed about a longitudinal axis of the blowout preventer and configured to be displaced radially inward towards the longitudinal axis upon actuation of the blowout preventer. The elastomeric, annular body includes a first section having a first set of material properties and a second section having a second set of material properties. The packing unit includes a plurality of rigid inserts distributed at equal radial distances from each other within the elastomeric annular body and about the longitudinal axis of the blowout preventer.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: May 15, 2012
    Assignee: Hydril USA Manufacturing LLC
    Inventors: Philip A. Huff, Shafiq Khandoker, Stefan Butuc
  • Patent number: 7736556
    Abstract: A method to manufacture a blowout preventer seal including disposing at least one insert and at least one elastomeric material in a mold, heating the mold to a cure temperature, curing the at least one elastomeric material, measuring a temperature of the at least one elastomeric material during the curing, adjusting a cure time and the cure temperature based on the measured temperature of the elastomeric material, and removing the cured blowout preventer seal from the mold.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: June 15, 2010
    Assignee: Hydril USA Manufacturing LLC
    Inventors: Stefan Butuc, Shafiq Khandoker
  • Publication number: 20100140516
    Abstract: A method of increasing the crosslink density of a seal for a blowout preventer that includes selectively applying electron beam radiation to a selected portion of a blowout preventer seal comprising a cured elastomeric material and at least one rigid insert to increase the crosslink density of the selected portion of the cured elastomeric material is disclosed. Methods of curing a seal for a blowout preventer, blowout preventers, and seals for blowout preventers are also disclosed.
    Type: Application
    Filed: December 10, 2008
    Publication date: June 10, 2010
    Inventor: Stefan Butuc
  • Publication number: 20080066906
    Abstract: A packing unit for a blowout preventer includes an elastomeric, annular body configured to be disposed about a longitudinal axis of the blowout preventer and configured to be displaced radially inward towards the longitudinal axis upon actuation of the blowout preventer. The elastomeric, annular body includes a first section having a first set of material properties and a second section having a second set of material properties. The packing unit includes a plurality of rigid inserts distributed at equal radial distances from each other within the elastomeric annular body and about the longitudinal axis of the blowout preventer.
    Type: Application
    Filed: July 27, 2007
    Publication date: March 20, 2008
    Applicant: HYDRIL COMPANY LP
    Inventors: Philip Huff, Shafiq Khandoker, Stefan Butuc
  • Publication number: 20080023865
    Abstract: A method to manufacture a blowout preventer seal including disposing at least one insert and at least one elastomeric material in a mold, heating the mold to a cure temperature, curing the at least one elastomeric material, measuring a temperature of the at least one elastomeric material during the curing, adjusting a cure time and the cure temperature based on the measured temperature of the elastomeric material, and removing the cured blowout preventer seal from the mold.
    Type: Application
    Filed: July 27, 2007
    Publication date: January 31, 2008
    Applicant: HYDRIL COMPANY LP
    Inventors: Stefan Butuc, Shafiq Khandoker