Patents by Inventor Sunder Ramachandran

Sunder Ramachandran 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: 11359126
    Abstract: The present disclosure provides a formulation and methods for simultaneously dissolving metal sulfide scales, inhibiting acid gas corrosion, and inhibiting the formation of calcite and barite in a system having low or high shear stress conditions due to fluid movement, in which the formulation contains a THP+salt, one or more corrosion inhibitors, one or more scale inhibitors, and one or more acid corrosion inhibitors. The formulation may be applied to the system in diluted or undiluted form, and continuously or in batch style.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: June 14, 2022
    Assignee: Baker Hughes Holdings LLC
    Inventors: Patrick James Rodgers, Brian Lundy, Sunder Ramachandran, David J. Poelker, James D. Ott
  • Patent number: 11313218
    Abstract: A tool for monitoring conditions within a subterranean well includes a first body segment, the first body segment being an elongated member with an axial protrusion having a reduced outer diameter. A second body segment is sized for mating with the first body segment. A metal specimen circumscribes the axial protrusion of the first body segment so that an outer diameter surface of the metal specimen defines an outer diameter of the tool. A connection assembly releasably secures the first body segment to the second body segment.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: April 26, 2022
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Vladimir Jovancicevic, Sunder Ramachandran, Amro Mukhles, Irfan Syafii
  • Patent number: 11229860
    Abstract: A scavenger comprising a formaldehyde sulfoxylate may be used to scavenge hydrogen sulfide (H2S) from systems that are brine or mixed production. Suitable formaldehyde sulfoxylates include, but are not necessarily limited to, sodium formaldehyde sulfoxylate, zinc formaldehyde sulfoxylate, and calcium formaldehyde sulfoxylate, potassium formaldehyde sulfoxylate, magnesium formaldehyde sulfoxylate, iron formaldehyde sulfoxylate, copper formaldehyde sulfoxylate, alkene aldehyde sulfoxylates, and combinations thereof.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: January 25, 2022
    Assignee: Baker Hughes Holdings LLC
    Inventors: Scott E. Lehrer, Soma Chakraborty, Sunder Ramachandran, Kimchi T. Phan
  • Patent number: 11142831
    Abstract: A method of preventing or mitigating corrosion on a metallic surface exposed to a supercritical fluid is disclosed. The method includes adding a corrosion inhibitor composition to a supercritical fluid comprising a supercritical carbon dioxide; and contacting the supercritical fluid with a metallic surface, wherein the corrosion inhibitor composition comprises a corrosion inhibitor that has a solubility of greater than 5,000 ppm in the supercritical fluid at 48.9° C. and 2,200 psi.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: October 12, 2021
    Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
    Inventors: Tracey Jackson, Sunder Ramachandran, Zhengwei Liu, Jonathan Stewart-Ayala
  • Patent number: 11118427
    Abstract: A method of determining a risk of corrosion and scale formation of tubing in a wellbore includes receiving, from a plurality of first sensors positioned at a downhole location of a wellbore, first production stream information and receiving, from a plurality of second sensors positioned at an uphole location, second production stream information. The method also includes performing a material balance to determine a first value representing a difference between a first production steam flow rate at the downhole location and a second production stream flow rate at the uphole location. The method also includes determining a second value representing a critical metal ion concentration of the production stream and, based on a result of comparing the first value with a threshold and based on the second value, determining a third value representing a risk of corrosion and scale formation at the tubing disposed within the wellbore.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: September 14, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Anuj Gupta, Sunder Ramachandran, Sebastian Csutak
  • Patent number: 11091998
    Abstract: A tool for monitoring conditions within a subterranean well includes a first body segment, the first body segment being an elongated member with an axial protrusion having a reduced outer diameter. A second body segment is sized for mating with the first body segment. A metal specimen circumscribes the axial protrusion of the first body segment so that an outer diameter surface of the metal specimen defines an outer diameter of the tool. A connection assembly releasably secures the first body segment to the second body segment.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: August 17, 2021
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Vladimir Jovancicevic, Sunder Ramachandran, Amro Mukhles, Irfan Syafii
  • Publication number: 20210246354
    Abstract: The present disclosure provides a formulation and methods for simultaneously dissolving metal sulfide scales, inhibiting acid gas corrosion, and inhibiting the formation of calcite and barite in a system having low or high shear stress conditions due to fluid movement, in which the formulation contains a THP+salt, one or more corrosion inhibitors, one or more scale inhibitors, and one or more acid corrosion inhibitors. The formulation may be applied to the system in diluted or undiluted form, and continuously or in batch style.
    Type: Application
    Filed: April 29, 2021
    Publication date: August 12, 2021
    Applicant: Baker Hughes, a GE company, LLC
    Inventors: Patrick James Rodgers, Brian Lundy, Sunder Ramachandran, David J. Poelker, James D. Ott
  • Patent number: 11021642
    Abstract: The present disclosure provides a formulation and methods for simultaneously dissolving metal sulfide scales, inhibiting acid gas corrosion, and inhibiting the formation of calcite and barite in a system having low or high shear stress conditions due to fluid movement, in which the formulation contains a THP+ salt, one or more corrosion inhibitors, one or more scale inhibitors, and one or more acid corrosion inhibitors. The formulation may be applied to the system in diluted or undiluted form, and continuously or in batch style.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: June 1, 2021
    Assignee: Baker Hughes Holdings LLC
    Inventors: Patrick James Rodgers, Brian Lundy, Sunder Ramachandran, David J. Poelker, James D. Ott
  • Publication number: 20210140311
    Abstract: Embodiments of the invention provide an untethered apparatus for measuring properties along a subterranean well. According to at least one embodiment, the untethered apparatus includes a housing, and one or more sensors configured to measure data along the subterranean well. The data includes one or more physical, chemical, geological or structural properties in the subterranean well. The untethered apparatus further includes a processor configured to control the one or more sensors measuring the data and to store the measured data, and a transmitter configured to transmit the measured data to a receiver arranged external to the subterranean well. Further, the untethered appratus includes a controller configured to control the buoyancy or the drag of the untethered apparatus to control a position of the untethered apparatus in the subterranean well. The processor includes instructions defining measurement parameters for the one or more sensors of the untethered apparatus within the subterranean well.
    Type: Application
    Filed: December 18, 2020
    Publication date: May 13, 2021
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Max DEFFENBAUGH, Gregory D. HAM, Jose Oliverio ALVAREZ, Gregory BERNERO, Sunder RAMACHANDRAN, Miguel GONZALEZ, Sebastian CSUTAK, Christopher POWELL, Huseyin SEREN
  • Publication number: 20210101095
    Abstract: A scavenger comprising a formaldehyde sulfoxylate may be used to scavenge hydrogen sulfide (H2S) from systems that are brine or mixed production. Suitable formaldehyde sulfoxylates include, but are not necessarily limited to, sodium formaldehyde sulfoxylate, zinc formaldehyde sulfoxylate, and calcium formaldehyde sulfoxylate, potassium formaldehyde sulfoxylate, magnesium formaldehyde sulfoxylate, iron formaldehyde sulfoxylate, copper formaldehyde sulfoxylate, alkene aldehyde sulfoxylates, and combinations thereof.
    Type: Application
    Filed: December 17, 2020
    Publication date: April 8, 2021
    Applicant: Baker Hughes, a GE company, LLC
    Inventors: Scott E. Lehrer, Soma Chakraborty, Sunder Ramachandran, Kimchi T. Phan
  • Publication number: 20210095563
    Abstract: A method of determining a risk of corrosion and scale formation of tubing in a wellbore includes receiving, from a plurality of first sensors positioned at a downhole location of a wellbore, first production stream information and receiving, from a plurality of second sensors positioned at an uphole location, second production stream information. The method also includes performing a material balance to determine a first value representing a difference between a first production steam flow rate at the downhole location and a second production stream flow rate at the uphole location. The method also includes determining a second value representing a critical metal ion concentration of the production stream and, based on a result of comparing the first value with a threshold and based on the second value, determining a third value representing a risk of corrosion and scale formation at the tubing disposed within the wellbore.
    Type: Application
    Filed: September 30, 2019
    Publication date: April 1, 2021
    Inventors: Anuj Gupta, Sunder Ramachandran, Sebastian Csutak
  • Patent number: 10940407
    Abstract: A scavenger comprising a formaldehyde sulfoxylate may be used to scavenge hydrogen sulfide (H2S) from systems that are brine or mixed production. Suitable formaldehyde sulfoxylates include, but are not necessarily limited to, sodium formaldehyde sulfoxylate, zinc formaldehyde sulfoxylate, and calcium formaldehyde sulfoxylate, potassium formaldehyde sulfoxylate, magnesium formaldehyde sulfoxylate, iron formaldehyde sulfoxylate, copper formaldehyde sulfoxylate, alkene aldehyde sulfoxylates, and combinations thereof.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: March 9, 2021
    Assignee: Baker Hughes Holdings LLC
    Inventors: Scott E. Lehrer, Soma Chakraborty, Sunder Ramachandran, Kimchi T. Phan
  • Patent number: 10900351
    Abstract: An untethered apparatus for measuring properties along a subterranean well. According to at least one embodiment, the untethered apparatus includes a housing, and one or more sensors configured to measure data along the subterranean well. The data includes one or more physical, chemical, geological or structural properties in the subterranean well. The untethered apparatus further includes a processor configured to control the one or more sensors measuring the data and to store the measured data, and a transmitter configured to transmit the measured data to a receiver arranged external to the subterranean well. Further, the untethered apparatus includes a controller configured to control the buoyancy or the drag of the untethered apparatus to control a position of the untethered apparatus in the subterranean well. The processor includes instructions defining measurement parameters for the one or more sensors of the untethered apparatus within the subterranean well.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: January 26, 2021
    Inventors: Max Deffenbaugh, Gregory D. Ham, Jose Oliverio Alvarez, Gregory Bernero, Sunder Ramachandran, Miguel Gonzalez, Sebastian Csutak, Christopher Powell, Huseyin Seren
  • Publication number: 20200347718
    Abstract: This disclosure is directed to the use of a portable Surface Enhance Raman Spectroscopy method to detect, quantify, and/or monitor corrosion inhibitors that are present in fluids in a wide range of concentrations in order to manage corrosion treatment in oil and gas production and refining systems or other industrial systems and to reduce the amount of time spent in obtaining data that is reliable and useful for corrosion control.
    Type: Application
    Filed: April 30, 2020
    Publication date: November 5, 2020
    Applicant: Baker Hughes, a GE company, LLC
    Inventors: Sankaran Murugesan, Prasad D. Dhulipala, Zhengwei Liu, Sunder Ramachandran
  • Publication number: 20200283913
    Abstract: A method of preventing or mitigating corrosion on a metallic surface exposed to a supercritical fluid is disclosed. The method includes adding a corrosion inhibitor composition to a supercritical fluid comprising a supercritical carbon dioxide; and contacting the supercritical fluid with a metallic surface, wherein the corrosion inhibitor composition comprises a corrosion inhibitor that has a solubility of greater than 5,000 ppm in the supercritical fluid at 48.9° C. and 2,200 psi.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 10, 2020
    Applicant: Baker Hughes Oilfield Operations LLC
    Inventors: Tracey Jackson, Sunder Ramachandran, Zhengwei Liu, Jonathan Stewart-Ayala
  • Patent number: 10731457
    Abstract: A method of wellbore analysis using TM01 and TE01 modes of radar waveforms can include transmitting, at a first time, a radar waveform from a wellhead into a tubing disposed in a wellbore positioned in a reservoir. The radar waveform is either a TM01 mode or a TE01 mode waveform. The tubing includes a fluid, and the surface of the wellbore includes the wellhead. At a second time, a reflected waveform generated by reflecting the transmitted radar waveform on a fluid surface of the fluid is received at the wellhead. A fluid level of the fluid is determined based on the time difference between the first time and the second time, and on a transmission speed of the radar waveform from the wellhead to the fluid surface. The fluid level is a distance between the wellhead and the fluid surface of the fluid.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: August 4, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Sunder Ramachandran, Aydin Babakhani
  • Publication number: 20190367799
    Abstract: A method of removing a metal sulfide deposit from a downhole environment comprises introducing into a subsurface well a treatment fluid comprising an alkane sulfonic acid, a dispersant, and a hydrogen sulfide scavenger; contacting a metal sulfide deposit in the downhole environment with the treatment fluid; and removing the metal sulfide deposit from the downhole environment.
    Type: Application
    Filed: September 26, 2017
    Publication date: December 5, 2019
    Applicant: Baker Hughes, a GE company, LLC
    Inventors: D.V. Satyanarayana Gupta, Sandra L. Berry, Andrea Nino-Penaloza, Elizabeth McCartney, Sunder Ramachandran, Carlos M. Menendez
  • Patent number: 10465105
    Abstract: A method of reducing an amount of a sulfur-containing compound in a reservoir fluid includes contacting a treatment fluid comprising an aqueous medium and an enzymatic scavenger with a precipitating fluid to precipitate the enzymatic scavenger; contacting the precipitated enzymatic scavenger with the reservoir fluid comprising the sulfur-containing compound; and reducing a number of the sulfur-containing compound in the reservoir fluid.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: November 5, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Soma Chakraborty, Prasad Dhulipala, Jeffrey Russek, Sunder Ramachandran, Jack Lynn
  • Publication number: 20190332089
    Abstract: Embodiments of the invention provide an untethered apparatus for measuring properties along a subterranean well. According to at least one embodiment, the untethered apparatus includes a housing, and one or more sensors configured to measure data along the subterranean well. The data includes one or more physical, chemical, geological or structural properties in the subterranean well. The untethered apparatus further includes a processor configured to control the one or more sensors measuring the data and to store the measured data, and a transmitter configured to transmit the measured data to a receiver arranged external to the subterranean well. Further, the untethered apparatus includes a controller configured to control the buoyancy or the drag of the untethered apparatus to control a position of the untethered apparatus in the subterranean well. The processor includes instructions defining measurement parameters for the one or more sensors of the untethered apparatus within the subterranean well.
    Type: Application
    Filed: July 11, 2019
    Publication date: October 31, 2019
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Max DEFFENBAUGH, Gregory D. HAM, Jose Oliverio ALVAREZ, Gregory BERNERO, Sunder RAMACHANDRAN, Miguel GONZALEZ, Sebastian CSUTAK, Christopher POWELL, Huseyin SEREN
  • Publication number: 20190308133
    Abstract: A method of removing impurities from formation fluids includes introducing a formation fluid into a first end of a first tubular, directing the formation fluid along a first flow path toward a second end of the first tubular, redirecting the formation fluid along a second flow path defined by a second tubular arranged radially outwardly of the first flow path toward the first end, spraying a treatment fluid along the first flow path into the formation fluid, and directing a treated formation fluid through an outlet fluidically connected to the second flow path.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 10, 2019
    Applicant: Baker Hughes, a GE company, LLC
    Inventors: Sunder Ramachandran, James Ott, Mahendra Ladharam Joshi, Pejman Kazempoor, Grant Lynn Hartman, Lily Jiang, Matthew L. George