Patents by Inventor Caspar G. Lewis

Caspar G. Lewis 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).

  • Christmas tree and wellhead design
    Patent number: 8371385
    Abstract: The device described herein combines a subsea wellhead and a tree mandrel into a single piece. The wellhead includes a tree valve block having an upper and lower section. The lower valve block section is integral with the wellhead and includes access between the production line and the tubing annulus to the main bore of the wellhead.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: February 12, 2013
    Assignee: Vetco Gray Inc.
    Inventor: Caspar G. Lewis
  • Christmas Tree and Wellhead Design
    Publication number: 20090294131
    Abstract: The device described herein combines a subsea wellhead and a tree mandrel into a single piece. The wellhead includes a tree valve block having an upper and lower section. The lower valve block section is integral with the wellhead and includes access between the production line and the tubing annulus to the main bore of the wellhead.
    Type: Application
    Filed: May 27, 2009
    Publication date: December 3, 2009
    Applicant: Vetco Gray Inc.
    Inventor: Caspar G. Lewis