Patents by Inventor Andrew Meredith

Andrew Meredith 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: 11248162
    Abstract: A viscosified aqueous solution, optionally for use in a subterranean wellbore, is made by reacting in aqueous solution (i) an initial polymer with either carboxylic acid or amino groups on its polymer chain, (ii) a second compound with an amino group or carboxylic acid group, and (iii) a coupling agent, so that molecules of the second compound join to the polymer chain through amide groups, thereby forming an aqueous solution of a modified polymer which, without separation from the aqueous solution, participates in cross-linking thereby enhancing viscosity of the solution. The second compound may include hydrophobic groups so that the modified polymer contains hydrophobic groups and is able to cross-link with itself or a viscoelastic surfactant through association of hydrophobic groups (without covalent bond formation) in aqueous solution. Such cross-links can reform after the fluid has been subjected to shear.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: February 15, 2022
    Assignee: Schlumberger Technology Corporation
    Inventors: Jesús Del Barrio, Robert Seth Hartshorne, Trevor Lloyd Hughes, Andrew Meredith
  • Patent number: 10876393
    Abstract: A method can include receiving sensor information from at least one sensor disposed in a downhole environment that includes an electric submersible pump operatively coupled to a power drive via a cable; receiving electrical information associated with transmission of power via the cable; and identifying a state of the electric submersible pump via an adaptive model of at least the cable and the electric submersible pump based at least in part on a portion of the sensor information and a portion of the electrical information.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: December 29, 2020
    Assignee: Sensia LLC
    Inventors: Dudi Rendusara, Andrew Meredith, Emmanuel Coste, Leo Steenson, Albert Hoefel
  • Patent number: 10844712
    Abstract: Provided herein are devices and methods for reducing the negative effects of bubble formation on the detection, quantification and/or monitoring of analytes.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: November 24, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Richard Ferguson, Gary Martin Oddie, Nathan Lawrence, Andrew Meredith, Laurent Pirolli, Emma Irene Corcoran
  • Publication number: 20200299569
    Abstract: A viscosified aqueous solution, optionally for use in a subterranean wellbore, is made by reacting in aqueous solution (i) an initial polymer with either carboxylic acid or amino groups on its polymer chain, (ii) a second compound with an amino group or carboxylic acid group, and (iii) a coupling agent, so that molecules of the second compound join to the polymer chain through amide groups, thereby forming an aqueous solution of a modified polymer which, without separation from the aqueous solution, participates in cross-linking thereby enhancing viscosity of the solution. The second compound may include hydrophobic groups so that the modified polymer contains hydrophobic groups and is able to cross-link with itself or a viscoelastic surfactant through association of hydrophobic groups (without covalent bond formation) in aqueous solution. Such cross-links can reform after the fluid has been subjected to shear.
    Type: Application
    Filed: March 19, 2020
    Publication date: September 24, 2020
    Inventors: Jesús Del Barrio, Robert Seth Hartshorne, Trevor Lloyd Hughes, Andrew Meredith
  • Patent number: 10605068
    Abstract: An electrochemical fluid sensor for a downhole production tool positionable in a wellbore penetrating a subterranean is provided. The wellbore has a downhole fluid therein. The electrochemical fluid sensor includes a sensor housing positionable in the downhole tool, a sensing solution positionable in the housing (the sensing solution including a mediator reactive to target chemicals), a gas permeable membrane to fluidly isolate the downhole fluid from the sensing solution (the gas permeable membrane permitting the passage of gas to the sensing solution), and a plurality of electrodes positioned about the housing a distance from the gas permeable membrane to measure reaction by the sensing solution whereby downhole parameters may be determined.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: March 31, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Laurent Pirolli, Gary Martin Oddie, Andrew Meredith, Nathan S. Lawrence, Kay McGuinness, John Collins
  • Patent number: 10386320
    Abstract: The present invention, in one set of embodiments, provides methods and systems for integrating conducting diamond electrodes into a high power acoustic resonator. More specifically, but not by way of limitation, in certain embodiments of the present invention, diamond electrodes may be integrated into a high power acoustic resonator to provide a robust sensing device that may provide for acoustic cleaning of the electrodes and increasing the rate of mass transport to the diamond electrodes. The diamond electrodes may be used as working, reference or counter electrodes or a combination of two or more of such electrodes. In certain aspects, the high power acoustic resonator may include an acoustic horn for focusing acoustic energy and the diamond electrodes may be coupled with the acoustic horn.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: August 20, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Clive E. Hall, Li Jiang, Timothy G. J. Jones, Andrew Meredith, Nathan S. Lawrence, Markus Pagels
  • Patent number: 10137423
    Abstract: Disclosed herein are devices and methods for the detection, quantification and/or monitoring of analytes. The systems and methods can be used, for example, to rapidly monitor gases downhole in a well.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: November 27, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kay McGuinness, Nathan Scott Lawrence, Andrew Meredith, Andrew Warrillow, Laurent Pirolli
  • Patent number: 9820858
    Abstract: A tibial tray component includes a tibial tray portion with a post portion protruding from a bone-contacting side of the tibial tray portion. The tibial tray portion may include ribs extending along the bone-facing side in areas of high stress during the gait cycle. The post portion may include at least one fin projecting outwardly from the post portion and extending along a portion of the length of the post portion. A cut block assembly includes a cut block and at least one pin. The cut block may include several mounting locations for the pin. The pin may include an anti-rotation portion and a tapered free end.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: November 21, 2017
    Assignee: Modal Manufacturing, LLC
    Inventors: Thomas Bradley Harris, Andrew Meredith Rynearson
  • Publication number: 20170089192
    Abstract: A method can include receiving sensor information from at least one sensor disposed in a downhole environment that includes an electric submersible pump operatively coupled to a power drive via a cable; receiving electrical information associated with transmission of power via the cable; and identifying a state of the electric submersible pump via an adaptive model of at least the cable and the electric submersible pump based at least in part on a portion of the sensor information and a portion of the electrical information.
    Type: Application
    Filed: May 22, 2015
    Publication date: March 30, 2017
    Inventors: Dudi Rendusara, Andrew Meredith, Emmanuel Coste, Leo Steenson, Albert Hoefel
  • Publication number: 20160278929
    Abstract: A tibial tray component includes a tibial tray portion with a post portion protruding from a bone-contacting side of the tibial tray portion. The tibial tray portion may include ribs extending along the bone-facing side in areas of high stress during the gait cycle. The post portion may include at least one fin projecting outwardly from the post portion and extending along a portion of the length of the post portion. A cut block assembly includes a cut block and at least one pin. The cut block may include several mounting locations for the pin. The pin may include an anti-rotation portion and a tapered free end.
    Type: Application
    Filed: March 23, 2015
    Publication date: September 29, 2016
    Inventors: Thomas Bradley Harris, Andrew Meredith Rynearson
  • Patent number: 9435192
    Abstract: An electrochemical sensor of a downhole tool positionable in a wellbore penetrating a subterranean formation is provided. The downhole tool has a flowline to receive downhole fluid. The electrochemical sensor includes a bulkhead carried by the downhole tool, a membrane exposed to the downhole fluid in the flowline, and an electrochemical cell supported by the bulkhead about the membrane. The electrochemical cell includes a plurality of cell sensors, at least one cell electrode, and a sensing solution. The plurality cell sensors include an analyte sensor, a temperature sensor, and a pH sensor. The sensing solution is reactive to certain analytes in the downhole fluid to generate electrical signals measurable by the plurality of cell sensors whereby parameters of chemicals in the downhole fluid may be measured.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: September 6, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Nathan S. Lawrence, Andrew Meredith, Kay McGuinness, Markus Pagels, Timothy G. J. Jones, Andrew Howe, Richard Ferguson
  • Publication number: 20160041120
    Abstract: Provided herein are devices and methods for reducing the negative effects of bubble formation on the detection, quantification and/or monitoring of analytes.
    Type: Application
    Filed: August 5, 2015
    Publication date: February 11, 2016
    Inventors: Richard Ferguson, Gary Martin Oddie, Nathan Lawrence, Andrew Meredith, Laurent Pirolli, Emma Irene Corcoran
  • Publication number: 20160033446
    Abstract: Disclosed herein are devices and methods for the detection, quantification and/or monitoring of analytes. The systems and methods can be used, for example, to rapidly monitor gases downhole in a well.
    Type: Application
    Filed: July 27, 2015
    Publication date: February 4, 2016
    Inventors: Kay McGuinness, Nathan Scott Lawrence, Andrew Meredith, Andrew Warrillow, Laurent Pirolli
  • Patent number: 9244034
    Abstract: A method of measuring pH of aqueous liquid with little or no buffer present uses an electrochemical pH sensor which comprises a plurality of electrodes with a redox active organic compound attached to an electrode and having at least one functional group convertible electrochemically between reduced and oxidized forms with transfer of at least one proton between the compound and surrounding aqueous phase, wherein the compound has at least one substituent group which promotes hydrogen bonding at a said functional group and thereby increases the reaction rate of proton transfer. The substituent group may form an internal hydrogen bond with a redox-convertible group or may enhance polarity to promote electrostatic interaction with water molecules and reduce activation energy. Such an electrochemical sensor may be used for pH measurement in computer controlled equipment for processing an aqueous liquid.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: January 26, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Nathan S. Lawrence, Andrew Meredith
  • Publication number: 20150167445
    Abstract: An electrochemical fluid sensor for a downhole production tool positionable in a wellbore penetrating a subterranean is provided. The wellbore has a downhole fluid therein. The electrochemical fluid sensor includes a sensor housing positionable in the downhole tool, a sensing solution positionable in the housing (the sensing solution including a mediator reactive to target chemicals), a gas permeable membrane to fluidly isolate the downhole fluid from the sensing solution (the gas permeable membrane permitting the passage of gas to the sensing solution), and a plurality of electrodes positioned about the housing a distance from the gas permeable membrane to measure reaction by the sensing solution whereby downhole parameters may be determined.
    Type: Application
    Filed: December 17, 2013
    Publication date: June 18, 2015
    Applicant: Schlumberger Technology Corporation
    Inventors: Laurent Pirolli, Gary Martin Oddie, Andrew Meredith, Nathan S. Lawrence, Kay McGuinness, John Collins
  • Patent number: 9034651
    Abstract: This invention relates to methods and apparatus for determination of ion concentrations, particularly in downhole water from hydrocarbon wells, aquifers etc. It is useful in a wide range of applications, including predicting the formation of scale and fingerprinting waters from different sources. More particularly, the invention relates to the use of ligands whose electronic configuration is altered by the binding of the scaling ions within a water sample. These alterations are detected electrochemically by applying varying potential to electrodes and measuring current flow as potential is varied, from which is derived the concentration of scaling ions in the fluid.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: May 19, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Li Jiang, Timothy Gareth John Jones, Andrew Meredith, Markus Pagels, Amilra Prasanna De Silva
  • Publication number: 20150122487
    Abstract: An electrochemical sensor of a downhole tool positionable in a wellbore penetrating a subterranean formation is provided. The downhole tool has a flowline to receive downhole fluid. The electrochemical sensor includes a bulkhead carried by the downhole tool, a membrane exposed to the downhole fluid in the flowline, and an electrochemical cell supported by the bulkhead about the membrane. The electrochemical cell includes a plurality of cell sensors, at least one cell electrode, and a sensing solution. The plurality cell sensors include an analyte sensor, a temperature sensor, and a pH sensor. The sensing solution is reactive to certain analytes in the downhole fluid to generate electrical signals measurable by the plurality of cell sensors whereby parameters of chemicals in the downhole fluid may be measured.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 7, 2015
    Applicant: Schlumberger Technology Corporation
    Inventors: Nathan S. Lawrence, Andrew Meredith, Kay McGuinness, Markus Pagels, Timothy G. J. Jones, Andrew Howe, Richard Ferguson
  • Patent number: 9005983
    Abstract: The present invention provides an electrochemical sensor having a solid electrically conductive substrate and a compound immobilized thereon which has binding affinity for an analyte species to be detected and also displays electrochemical behavior which is modified upon binding of that analyte species, so that binding of an analyte species can be detected by measuring electrochemical properties, such as by voltammetry. Desirably the immobilized compound contains both a first moiety with binding affinity for the analyte and a separate second moiety which is a redox system whose electrochemical oxidation/reduction properties become modified when the first moiety binds the analyte. The analyte binding moiety may be a diol or polyol and preferably is a sugar. The electrochemical sensor finds use in methods of analyzing reservoir and process fluids, particularly at a subterranean location. The electrochemical sensor may be a component of a downhole tool, adapted for deployment downhole.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: April 14, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Kay McGuinness, Nathan Lawrence, Andrew Meredith
  • Publication number: 20140367277
    Abstract: An electrochemical sensor incorporates a ferrocenophane which is a compound with at least one bridging group covalently attached to and connecting the two cyclopentadiene rings associated with the same iron atom. This bridging group maybe tetramethylene. As compared to an equivalent sensor with ferrocene, the tolerance of elevated temperature is improved and so is the working life at ambient temperature.
    Type: Application
    Filed: December 21, 2012
    Publication date: December 18, 2014
    Inventors: Lynne Crawford, Andrew Meredith, Nathan Lawrence, Timothy Jones
  • Patent number: 8904859
    Abstract: A gas separation and detection tool for performing in situ analysis of borehole fluid is described. The tool comprises a sampling chamber for a downhole fluid. The sample chamber comprises a detector cell with an opening. The tool also comprises a gas separation module for taking a gas from the downhole fluid. The gas separation module comprises a membrane located in the opening, a support for holding the membrane, and a sealant applied between the housing and the membrane or support. Moreover, the tool comprises a gas detector for sensing the gas.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: December 9, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Jimmy Lawrence, Tim G. J. Jones, Kentaro Indo, Tsutomu Yamate, Noriyuki Matsumoto, Michael M. Toribio, Hidetoshi Yoshiuchi, Andrew Meredith, Nathan S. Lawrence, Li Jiang, Go Fujisawa, Oliver C. Mullins