Patents by Inventor Brian C. Llewellyn

Brian C. Llewellyn 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 and apparatus for sensing a borehole characteristic
    Patent number: 8077053
    Abstract: An apparatus and method are disclosed for sensing a characteristic of a borehole. An exemplary apparatus includes a conductive pipe; an inlet, connected to the conductive pipe, for applying pulse to the conductive pipe; a resonant network device connected with the conductive pipe; and a transducer which is in operative communication with the resonant network device to measure a borehole characteristic, the transducer being configured to sense a modulated vibration frequency induced in the resonant network device when a pulse is applied to the inlet.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: December 13, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: M. Clark Thompson, Koby Carlson, Don M. Coates, Manuel E. Gonzalez, Brian C. Llewellyn
  • Controlling the pressure within an annular volume of a wellbore
    Patent number: 7963333
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: June 21, 2011
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security LLC
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys, Don M. Coates
  • Controlling the pressure within an annular volume of a wellbore
    Patent number: 7950460
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: May 31, 2011
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security, LLC
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys, Don M. Coates
  • Controlling the pressure within an annular volume of a wellbore
    Patent number: 7870905
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: January 18, 2011
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security, LLC
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys
  • Controlling the Pressure within an Annular Volume of a Wellbore
    Publication number: 20100236780
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 23, 2010
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys, Don M. Coates
  • Controlling the Pressure Within an Annular Volume of a Wellbore
    Publication number: 20100163236
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Application
    Filed: December 17, 2009
    Publication date: July 1, 2010
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys, Don M. Coates
  • Controlling the pressure within an annular volume of a wellbore
    Patent number: 7743830
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: June 29, 2010
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys
  • Controlling the Pressure Within an Annular Volume of a Wellbore
    Publication number: 20100096138
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Application
    Filed: December 17, 2009
    Publication date: April 22, 2010
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys, Don M. Coates
  • Controlling the Pressure Within an Annular Volume of a Wellbore
    Publication number: 20090133878
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Application
    Filed: October 10, 2008
    Publication date: May 28, 2009
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys, Don M. Coates
  • Controlling the pressure within an annular volume of a wellbore
    Patent number: 7441599
    Abstract: A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: October 28, 2008
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security, LLC
    Inventors: Robert E. Hermes, Manuel E. Gonzalez, Brian C. Llewellyn, James B. Bloys