Patents by Inventor Michael Doan

Michael Doan 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).

  • Isolation ring on gap sub
    Patent number: 9829133
    Abstract: A gap sub comprises at least one electrically isolating threaded joint in a conductive tubular collar. The threads of the joints are isolated by a non-conductive coating. The shoulders of the joints are separated by an isolating ring. Annular faces on the ring make contact with the shoulders in the joints. The ring is made of conductive material with a non-conductive coating deployed on (1) at least one of the ring's annular faces, and (2) the interior surface of the ring. An annular recess in the collar prevents electrical contact between collar sections nearby the ring on either side of at least one threaded joint.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: November 28, 2017
    Assignee: GE Energy Oil Field Technology Inc.
    Inventors: Mark Miller, Craig MacDonald, Michael Doan
  • ISOLATION RING ON GAP SUB
    Publication number: 20140049036
    Abstract: A gap sub comprises at least one, and in a preferred embodiment, two electrically isolating threaded joints in a conductive tubular collar. The threads of the joints are isolated by a non-conductive coating in accordance with the prior art. The shoulders of the joints are separated by an isolating ring. Annular faces on the ring make contact with the shoulders in the joints. The ring is made of conductive material with a non-conductive coating deployed on (1) at least one, and advantageously both, of the ring's annular faces, and (2) the interior surface of the ring. An annular recess in the collar prevents electrical contact between collar sections nearby the ring either side of each threaded joint.
    Type: Application
    Filed: April 8, 2013
    Publication date: February 20, 2014
    Applicant: Sharewell Energy Services, LLC
    Inventors: Mark Miller, Craig MacDonald, Michael Doan
  • Encapsulated and vented particulate thermal insulation
    Patent number: 8453393
    Abstract: An article includes a piece of encapsulated insulation including an envelope having at least two vents therethrough, a particulate insulation within the envelope, and a porous filter overlying each vent of the envelope. The porous filter has a mesh size no larger that the minimum size of the particles. The article may further include a structure having a structure surface, and the piece of encapsulated insulation overlies and covers at least a portion of the structure surface.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: June 4, 2013
    Assignees: Raytheon Company, Aspen Aerogels, Inc.
    Inventors: Alberto E. Schroth, Jimmy L. Clark, Michael Doan, David M. La Komski, Shannon O. White, Stephen E. Smith, Christopher M. Shaffer, Wilfried Krone-Schmidt
  • Encapsulated and vented particulate thermal insulation
    Publication number: 20080057334
    Abstract: An article includes a piece of encapsulated insulation including an envelope having at least two vents therethrough, a particulate insulation within the envelope, and a porous filter overlying each vent of the envelope. The porous filter has a mesh size no larger that the minimum size of the particles. The article may further include a structure having a structure surface, and the piece of encapsulated insulation overlies and covers at least a portion of the structure surface.
    Type: Application
    Filed: August 25, 2006
    Publication date: March 6, 2008
    Inventors: Alberto E. Schroth, Jimmy L. Clark, Michael Doan, David M. La Komski, Shannon O. White, Stephen E. Smith, Christopher M. Shaffer, Wilfried Krone-Schmidt