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).
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Patent number: 11965853Abstract: 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: GrantFiled: December 21, 2012Date of Patent: April 23, 2024Assignee: Schlumberger Technology CorporationInventors: Lynne Crawford, Andrew Meredith, Nathan Lawrence, Timothy Jones
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Patent number: 11248162Abstract: 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: GrantFiled: March 19, 2020Date of Patent: February 15, 2022Assignee: Schlumberger Technology CorporationInventors: Jesús Del Barrio, Robert Seth Hartshorne, Trevor Lloyd Hughes, Andrew Meredith
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Patent number: 10876393Abstract: 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: GrantFiled: May 22, 2015Date of Patent: December 29, 2020Assignee: Sensia LLCInventors: Dudi Rendusara, Andrew Meredith, Emmanuel Coste, Leo Steenson, Albert Hoefel
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Patent number: 10844712Abstract: Provided herein are devices and methods for reducing the negative effects of bubble formation on the detection, quantification and/or monitoring of analytes.Type: GrantFiled: August 5, 2015Date of Patent: November 24, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Richard Ferguson, Gary Martin Oddie, Nathan Lawrence, Andrew Meredith, Laurent Pirolli, Emma Irene Corcoran
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Publication number: 20200299569Abstract: 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: ApplicationFiled: March 19, 2020Publication date: September 24, 2020Inventors: Jesús Del Barrio, Robert Seth Hartshorne, Trevor Lloyd Hughes, Andrew Meredith
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Patent number: 10605068Abstract: 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: GrantFiled: December 17, 2013Date of Patent: March 31, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Laurent Pirolli, Gary Martin Oddie, Andrew Meredith, Nathan S. Lawrence, Kay McGuinness, John Collins
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Patent number: 10386320Abstract: 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: GrantFiled: May 15, 2014Date of Patent: August 20, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Clive E. Hall, Li Jiang, Timothy G. J. Jones, Andrew Meredith, Nathan S. Lawrence, Markus Pagels
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Patent number: 10137423Abstract: 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: GrantFiled: July 27, 2015Date of Patent: November 27, 2018Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Kay McGuinness, Nathan Scott Lawrence, Andrew Meredith, Andrew Warrillow, Laurent Pirolli
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Patent number: 9820858Abstract: 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: GrantFiled: March 23, 2015Date of Patent: November 21, 2017Assignee: Modal Manufacturing, LLCInventors: Thomas Bradley Harris, Andrew Meredith Rynearson
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Publication number: 20170089192Abstract: 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: ApplicationFiled: May 22, 2015Publication date: March 30, 2017Inventors: Dudi Rendusara, Andrew Meredith, Emmanuel Coste, Leo Steenson, Albert Hoefel
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Publication number: 20160278929Abstract: 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: ApplicationFiled: March 23, 2015Publication date: September 29, 2016Inventors: Thomas Bradley Harris, Andrew Meredith Rynearson
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Patent number: 9435192Abstract: 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: GrantFiled: November 6, 2013Date of Patent: September 6, 2016Assignee: Schlumberger Technology CorporationInventors: Nathan S. Lawrence, Andrew Meredith, Kay McGuinness, Markus Pagels, Timothy G. J. Jones, Andrew Howe, Richard Ferguson
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Publication number: 20160041120Abstract: Provided herein are devices and methods for reducing the negative effects of bubble formation on the detection, quantification and/or monitoring of analytes.Type: ApplicationFiled: August 5, 2015Publication date: February 11, 2016Inventors: Richard Ferguson, Gary Martin Oddie, Nathan Lawrence, Andrew Meredith, Laurent Pirolli, Emma Irene Corcoran
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Publication number: 20160033446Abstract: 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: ApplicationFiled: July 27, 2015Publication date: February 4, 2016Inventors: Kay McGuinness, Nathan Scott Lawrence, Andrew Meredith, Andrew Warrillow, Laurent Pirolli
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Patent number: 9244034Abstract: 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: GrantFiled: May 4, 2012Date of Patent: January 26, 2016Assignee: Schlumberger Technology CorporationInventors: Nathan S. Lawrence, Andrew Meredith
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Publication number: 20150167445Abstract: 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: ApplicationFiled: December 17, 2013Publication date: June 18, 2015Applicant: Schlumberger Technology CorporationInventors: Laurent Pirolli, Gary Martin Oddie, Andrew Meredith, Nathan S. Lawrence, Kay McGuinness, John Collins
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Patent number: 9034651Abstract: 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: GrantFiled: June 22, 2010Date of Patent: May 19, 2015Assignee: Schlumberger Technology CorporationInventors: Li Jiang, Timothy Gareth John Jones, Andrew Meredith, Markus Pagels, Amilra Prasanna De Silva
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Publication number: 20150122487Abstract: 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: ApplicationFiled: November 6, 2013Publication date: May 7, 2015Applicant: Schlumberger Technology CorporationInventors: Nathan S. Lawrence, Andrew Meredith, Kay McGuinness, Markus Pagels, Timothy G. J. Jones, Andrew Howe, Richard Ferguson
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Patent number: 9005983Abstract: 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: GrantFiled: August 26, 2009Date of Patent: April 14, 2015Assignee: Schlumberger Technology CorporationInventors: Kay McGuinness, Nathan Lawrence, Andrew Meredith
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Publication number: 20140367277Abstract: 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: ApplicationFiled: December 21, 2012Publication date: December 18, 2014Inventors: Lynne Crawford, Andrew Meredith, Nathan Lawrence, Timothy Jones