Patents by Inventor Unnikrishnan C. Vasudevan

Unnikrishnan C. Vasudevan 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).

  • MULTILAYERED COATING FOR DOWNHOLE TOOLS WITH ENHANCED WEAR RESISTANCE AND ACIDIC CORROSION RESISTANCE
    Publication number: 20180266002
    Abstract: A coating for protecting a base material from wear and corrosion includes a first layer deposited directly onto an outer surface of the base material. In addition, the coating includes a second layer deposited directly onto the first layer. The first layer is positioned between the base material and the second layer. The first layer includes chromium having a first micro-crack density and the second layer comprises chromium having a second micro-crack density that is less than the first micro-crack density.
    Type: Application
    Filed: May 22, 2018
    Publication date: September 20, 2018
    Applicant: National Oilwell DHT, L.P.
    Inventors: Jiinjen Albert Sue, Unnikrishnan C. Vasudevan, Rajagopala N. Pillai
  • Multilayered Coating for Downhole Tools with Enhanced Wear Resistance and Acidic Corrosion Resistance
    Publication number: 20150132604
    Abstract: A coating for protecting a base material from wear and corrosion includes a first layer deposited directly onto an outer surface of the base material. In addition, the coating includes a second layer deposited directly onto the first layer. The first layer is positioned between the base material and the second layer. The first layer includes chromium having a first micro-crack density and the second layer comprises chromium having a second micro-crack density that is less than the first micro-crack density.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 14, 2015
    Applicant: National Oilwell DHT, L.P.
    Inventors: Jiinjen Albert Sue, Unnikrishnan C. Vasudevan, Rajagopala N. Pillai