Patents by Inventor Rajan K. Bamola

Rajan K. Bamola 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).

  • Method of forming an uninterrupted refractory coating on a downhole drill bit cone
    Patent number: 5348770
    Abstract: Drill bits having projecting inserts are completely coated with refractory material including on the edge margins about the inserts by thermally spraying with refractory particles whose particulate constituent under the spraying conditions is able to penetrate the inserts. Completely coated drill bits are provided.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: September 20, 1994
    Inventors: G. Kelly Sievers, Rajan K. Bamola
  • Downhole drill bit cone with uninterrupted refractory coating
    Patent number: 5279374
    Abstract: Drill bits having projecting inserts are completely coated with refractory material including on the edge margins about the inserts by thermally spraying with refractory particles whose particulate constituent under the spraying conditions is able to penetrate the inserts. Completely coated drill bits are provided.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: January 18, 1994
    Inventors: G. Kelly Sievers, Rajan K. Bamola