Patents by Inventor John D. Sherwood

John D. Sherwood 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).

  • Patent number: 7857049
    Abstract: Embodiments of the present invention relate to systems and methods for real-time management of a guarded probe device down a wellbore that is being used for formation fluid sampling. More specifically, but not by way of limitation, embodiments of the present invention provide for operational management of the guarded probe device to provide for splitting a flowline coupled with the guarded probe into two separate flow lines after the sampling process has begun, wherein one of the two separate flow-lines is coupled with a sampling probe in the guarded probe device and the other flowline is coupled with a guard probe in the guarded probe device.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: December 28, 2010
    Assignee: Schlumberger Technology Corporation
    Inventor: John D. Sherwood
  • Patent number: 7841406
    Abstract: A fluid sampling system retrieves a formation fluid sample from a formation surrounding a wellbore extending along a wellbore axis, wherein the formation has a virgin fluid and a contaminated fluid therein. The system includes a sample inlet, a first guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a first direction along the wellbore axis, and a second guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a second, opposite direction along the wellbore axis. At least one cleanup flowline is fluidly connected to the first and second guard inlets for passing contaminated fluid, and an evaluation flowline is fluidly connected to the sample inlet for collecting virgin fluid.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: November 30, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Alexander F. Zazovsky, Colin Longfield, Julian J. Pop, Thomas H. Zimmerman, John D. Sherwood, Keith A. Burgess
  • Patent number: 7757760
    Abstract: Embodiments of the present invention relate to systems and methods for real-time management of formation fluid sampling down a wellbore using a guarded probe. More specifically, but not by way of limitation, embodiments of the present invention provide for management of downhole fluid sampling by sensing properties of fluids collected by a downhole-fluid-sampling-device, modeling the fluid sampling process from these sensed properties and using the modeling of the fluid sampling process to manage in real-time the fluid sampling process.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: July 20, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: John D. Sherwood, Oliver C. Mullins
  • Patent number: 7654321
    Abstract: A fluid sampling system retrieves a formation fluid sample from a formation surrounding a wellbore extending along a wellbore axis, wherein the formation has a virgin fluid and a contaminated fluid therein. The system includes a sample inlet, a first guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a first direction along the wellbore axis, and a second guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a second, opposite direction along the wellbore axis. At least one cleanup flowline is fluidly connected to the first and second guard inlets for passing contaminated fluid, and an evaluation flowline is fluidly connected to the sample inlet for collecting virgin fluid.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: February 2, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Alexander F. Zazovsky, Colin Longfield, Julian J. Pop, Thomas H. Zimmerman, John D. Sherwood, Keith A. Burgess
  • Publication number: 20100018704
    Abstract: A fluid sampling system retrieves a formation fluid sample from a formation surrounding a wellbore extending along a wellbore axis, wherein the formation has a virgin fluid and a contaminated fluid therein. The system includes a sample inlet, a first guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a first direction along the wellbore axis, and a second guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a second, opposite direction along the wellbore axis. At least one cleanup flowline is fluidly connected to the first and second guard inlets for passing contaminated fluid, and an evaluation flowline is fluidly connected to the sample inlet for collecting virgin fluid.
    Type: Application
    Filed: September 11, 2009
    Publication date: January 28, 2010
    Inventors: ALEXANDER F. ZAZOVSKY, Colin Longfield, Julian J. Pop, Thomas H. Zimmerman, John D. Sherwood, Keith A. Burgess
  • Publication number: 20080156487
    Abstract: A fluid sampling system retrieves a formation fluid sample from a formation surrounding a wellbore extending along a wellbore axis, wherein the formation has a virgin fluid and a contaminated fluid therein. The system includes a sample inlet, a first guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a first direction along the wellbore axis, and a second guard inlet positioned adjacent to the sample inlet and spaced from the sample inlet in a second, opposite direction along the wellbore axis.
    Type: Application
    Filed: December 27, 2006
    Publication date: July 3, 2008
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Alexander F. Zazovsky, Colin Longfield, Julian J. Pop, Thomas H. Zimmerman, John D. Sherwood, Keith A. Burgess
  • Publication number: 20080125973
    Abstract: Embodiments of the present invention relate to systems and methods for real-time management of formation fluid sampling down a wellbore using a guarded probe. More specifically, but not by way of limitation, embodiments of the present invention provide for management of downhole fluid sampling by sensing properties of fluids collected by a downhole-fluid-sampling-device, modeling the fluid sampling process from these sensed properties and using the modeling of the fluid sampling process to manage in real-time the fluid sampling process.
    Type: Application
    Filed: September 22, 2006
    Publication date: May 29, 2008
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: John D. Sherwood, Oliver C. Mullins
  • Publication number: 20080073078
    Abstract: Embodiments of the present invention relate to systems and methods for real-time management of a guarded probe device down a wellbore that is being used for formation fluid sampling. More specifically, but not by way of limitation, embodiments of the present invention provide for operational management of the guarded probe device to provide for splitting a flowline coupled with the guarded probe into two separate flow lines after the sampling process has begun, wherein one of the two separate flow-lines is coupled with a sampling probe in the guarded probe device and the other flowline is coupled with a guard probe in the guarded probe device.
    Type: Application
    Filed: September 22, 2006
    Publication date: March 27, 2008
    Applicant: Schlumberger Technology Corporation
    Inventor: John D. Sherwood
  • Patent number: 6719049
    Abstract: The invention concerns a method of sampling the formation fluids in an earth formation surrounding a borehole, the region of the formation immediately surrounding the borehole being at least partially invaded by borehole fluids, and an apparatus for carrying out such a method. According to the invention, a borehole tool is adapted to be lowered into the borehole and is provided with a sampling probe device and means for urging the sampling probe device into contact with the borehole wall, the sampling probe device comprising an inner probe and an outer probe surrounding the inner probe for withdrawing respective fluid samples from the formation, wherein the ratio between the respective flow areas of the inner and outer probes is selected so as to tend to reduce the time taken to obtain via the inner probe a sample of the formation fluids having a given level of contamination by borehole fluids.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: April 13, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: John D. Sherwood, John B. Fitzgerald, Bunker M. Hill
  • Publication number: 20030217845
    Abstract: The invention concerns a method of sampling the formation fluids in an earth formation surrounding a borehole, the region of the formation immediately surrounding the borehole being at least partially invaded by borehole fluids, and an apparatus for carrying out such a method. According to the invention, a borehole tool is adapted to be lowered into the borehole and is provided with a sampling probe device and means for urging the sampling probe device into contact with the borehole wall, the sampling probe device comprising an inner probe and an outer probe surrounding the inner probe for withdrawing respective fluid samples from the formation, wherein the ratio between the respective flow areas of the inner and outer probes is selected so as to tend to reduce the time taken to obtain via the inner probe a sample of the formation fluids having a given level of contamination by borehole fluids.
    Type: Application
    Filed: May 23, 2002
    Publication date: November 27, 2003
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: John D. Sherwood, John B. Fitzgerald, Bunker M. Hill
  • Patent number: 5294636
    Abstract: A physical form of N-[4-[5 -(cyclopentyloxycarbonyl)amino-1-methyl-indol-3-ylmethyl]-3-methoxybenzoyl ]-2-methylbenzenesulphonamide substantially free of other physical forms, which form is crystalline, has an X-ray powder diffraction pattern with specific peaks occuring at 2.theta.=8.1, 13.7, 16.4, 20.5 and 23.7.degree. and an infra-red spectrum (0.5% in KBr) having sharp peaks at 3370, 1670, 1525, 1490, 1280, 890, 870 and 550 cm.sup.-1, a process for its preparation and pharmaceutical compositions containing it. Also disclosed is a flowable preparation of the physical form which is in the form of soft pellets, and a process for obtaining this preparation.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: March 15, 1994
    Assignee: Imperial Chemical Industries plc
    Inventors: Martin P. Edwards, John D. Sherwood