Patents by Inventor Colin S. Headworth

Colin S. Headworth 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).

  • Abandonment of sub-sea wells
    Patent number: 5372198
    Abstract: A cased suspended sub-sea well is secured for abandonment by setting a packer in the casing thereof, the packer having a perforating gun suspended therefrom firing the gun to perforate the casing and then injecting cement into the annulus behind the casing.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: December 13, 1994
    Assignee: Halliburton Company
    Inventors: John C. North, David O. Nelson, Colin S. Headworth