Patents by Inventor Tirumani Swaminathan
Tirumani Swaminathan 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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Publication number: 20240026763Abstract: A method of controlling a pumping stage of a fracturing fleet at a wellsite with a set of diesel pumps and at least one electric pump to smooth the flowrate transition to an operational setpoint with a higher flowrate. An optimization process communicatively connected to the plurality of pumping units can iterate an interim setpoint with a transfer function model to each pumping unit. The transfer function model can generate a smooth flowrate transition by decreasing the flowrate of at least one pump unit while increasing the flowrate to the remaining pump units.Type: ApplicationFiled: July 14, 2022Publication date: January 25, 2024Inventors: Zhijie SUN, Yang YU, Tirumani SWAMINATHAN, Ian MITCHELL, Sergei PARSEGOV
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Publication number: 20240026764Abstract: A method of controlling a pumping stage of a fracturing fleet at a wellsite with a set of diesel pumps and at least one electric pump to reduce the total operating cost by decreasing the flowrate to the pump units with the higher operating cost and increasing the flowrate to the pump units with the lower operating costs. An optimization process on a computer system communicatively connected to the plurality of pumping units can communicate a first interim setpoint to each pumping unit. The optimization process can calculate an operating cost for the diesel frac pumps based on sensor measurements of pressure, flowrate, and motor speed. The optimization process can calculate an operating cost for the electric frac pumps based on the measured power usage and cost of the power. The optimization process can lower the operating cost of fracturing fleet below a threshold operating cost value.Type: ApplicationFiled: July 14, 2022Publication date: January 25, 2024Inventors: Zhijie SUN, Tirumani SWAMINATHAN, Ian MITCHELL
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Publication number: 20240018859Abstract: A method of controlling a pumping stage of a fracturing fleet at a wellsite with at least two electric frac pumps to increase the efficiency of the electric frac pumps comprises communicating an interim flowrate to the electric frac pumps and calculating an efficiency value from measured power from the VFD and measured flow rate, intake pressure, and discharge pressure. The method can increase a total efficiency of the fracturing fleet above a threshold efficiency value by iterating the interim setpoint from a first interim setpoint to a second interim setpoint for the electric frac pumps, wherein the second interim setpoint decreases the flowrate to the less efficient electric frac pumps and increases the flowrate an equal amount to the more efficient electric frac pumps.Type: ApplicationFiled: July 14, 2022Publication date: January 18, 2024Inventors: Zhijie SUN, Tirumani SWAMINATHAN, Sergei PARSEGOV
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Patent number: 11814947Abstract: Aspects of the subject technology relate to systems and methods for optimizing multi-unit pumping operations at a well site. Systems and methods are provided for receiving sensor data from a hydraulic fracturing fleet equipment at an equipment system, designating an event as being flagged based on the sensor data from the hydraulic fracturing fleet equipment, determining a physical action based on the flagged event and a priority list of actions, and providing instructions to a first pump of the hydraulic fracturing fleet equipment to perform the physical action based on the flagged event and the priority list of actions.Type: GrantFiled: July 1, 2021Date of Patent: November 14, 2023Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventors: Daniel Joshua Stark, Sergei Parsegov, Tirumani Swaminathan, Baidurja Ray
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Patent number: 11668168Abstract: A system is provided including at least one pump for pumping a fluid into a wellbore, a pressure sensor provided at a wellhead of the wellbore for measuring a backpressure of the fluid being pumped into the wellbore, and a diagnostic manager. The diagnostic manager obtains pressure data associated with a pressure signal from the pressure sensor, wherein the pressure data includes pressure measurements of the fluid over a selected time period. The diagnostic manager converts, based on the pressure data, at least a portion of the pressure signal into frequency domain. The diagnostic manager detects a change in frequency of the pressure signal in the Fourier spectrum and determines that a fault associated with the wellbore has occurred based on the changed frequency of the pressure signal.Type: GrantFiled: August 27, 2021Date of Patent: June 6, 2023Assignee: Halliburton Energy Services, Inc.Inventors: Sergei Parsegov, Stanley Vernon Stephenson, Tirumani Swaminathan, Daniel Joshua Stark, Baidurja Ray
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Publication number: 20230120763Abstract: A machine learning model trained to predict offset pressure (“predictor”) is used to generate a pumping schedule that mitigates well interference during a hydraulic fracturing treatment operation. Diverse candidate pumping schedules are generated according to pumping schedule constraints. Feature inputs are populated with the candidate pumping schedules and with static and dynamic features related to the operation. The feature inputs are fed into one or more instances of the predictor to obtain offset pressure predictions at a prediction horizon for which the predictor was configured. The offset pressure predictions are evaluated to identify the one that best satisfies a well interference mitigation objective and the corresponding candidate pumping schedule is identified for well interference mitigation.Type: ApplicationFiled: October 20, 2021Publication date: April 20, 2023Inventors: Baidurja Ray, Sergei Parsegov, Tirumani Swaminathan, Daniel Joshua Stark
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Publication number: 20230066612Abstract: A system is provided including at least one pump for pumping a fluid into a wellbore, a pressure sensor provided at a wellhead of the wellbore for measuring a backpressure of the fluid being pumped into the wellbore, and a diagnostic manager. The diagnostic manager obtains pressure data associated with a pressure signal from the pressure sensor, wherein the pressure data includes pressure measurements of the fluid over a selected time period. The diagnostic manager converts, based on the pressure data, at least a portion of the pressure signal into frequency domain. The diagnostic manager detects a change in frequency of the pressure signal in the Fourier spectrum and determines that a fault associated with the wellbore has occurred based on the changed frequency of the pressure signal.Type: ApplicationFiled: August 27, 2021Publication date: March 2, 2023Inventors: Sergei Parsegov, Stanley Vernon Stephenson, Tirumani Swaminathan, Daniel Joshua Stark, Baidurja Ray
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Publication number: 20230003115Abstract: Aspects of the subject technology relate to systems and methods for optimizing multi-unit pumping operations at a well site. Systems and methods are provided for receiving sensor data from a hydraulic fracturing fleet equipment at an equipment system, designating an event as being flagged based on the sensor data from the hydraulic fracturing fleet equipment, determining a physical action based on the flagged event and a priority list of actions, and providing instructions to a first pump of the hydraulic fracturing fleet equipment to perform the physical action based on the flagged event and the priority list of actions.Type: ApplicationFiled: July 1, 2021Publication date: January 5, 2023Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Daniel Joshua STARK, Sergei PARSEGOV, Tirumani SWAMINATHAN, Baidurja RAY
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Patent number: 11041382Abstract: A system for downhole wellbore vector strain sensing including a strain sensor positionable between an outer surface of a wellbore casing and a subterranean formation for sensing a plurality of strain tensor elements, the plurality of strain tensor elements comprising multiple components of a strain tensor; a computing device positionable at a surface of a wellbore and communicatively coupled to the strain sensor; and a communication link between the strain sensor and the computing device for communicatively coupling the strain sensor to the computing device to relay strain data, the strain data comprising the plurality of strain tensor elements.Type: GrantFiled: November 25, 2019Date of Patent: June 22, 2021Assignee: Halliburton Energy Services, Inc.Inventors: Henry Clifford Bland, Mikko Jaaskelainen, Joshua Lane Camp, Tirumani Swaminathan, Eric James Davis
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Publication number: 20210156247Abstract: A system for downhole wellbore vector strain sensing including a strain sensor positionable between an outer surface of a wellbore casing and a subterranean formation for sensing a plurality of strain tensor elements, the plurality of strain tensor elements comprising multiple components of a strain tensor; a computing device positionable at a surface of a wellbore and communicatively coupled to the strain sensor; and a communication link between the strain sensor and the computing device for communicatively coupling the strain sensor to the computing device to relay strain data, the strain data comprising the plurality of strain tensor elements.Type: ApplicationFiled: November 25, 2019Publication date: May 27, 2021Inventors: Henry Clifford Bland, Mikko Jaaskelainen, Joshua Lane Camp, Tirumani Swaminathan, Eric James Davis
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Patent number: 10358740Abstract: A system for growing a crystal ingot from a melt is provided. The system includes a crucible assembly, a first heater, a second heater, and a passive heater. The crucible assembly includes a crucible and a weir separating an outer melt zone of the melt from an inner melt zone of the melt. The first heater is configured to supply thermal energy to the melt by conduction through the crucible. The second heater is configured to generate thermal radiation. The passive heater is configured to supply thermal energy to the outer melt zone by transferring thermal radiation generated by the second heater to the outer melt zone.Type: GrantFiled: July 25, 2014Date of Patent: July 23, 2019Assignee: Corner Star LimitedInventor: Tirumani Swaminathan
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Patent number: 9476141Abstract: A system for growing a crystal ingot from a melt is provided. The system includes a first crucible, a barrier, and a shield. The first crucible has a first base and a first sidewall forming a first cavity for containing the melt. The barrier is disposed within the first cavity of the first crucible to inhibit movement of the melt from outward of the barrier to inward of the barrier. The barrier extends from the first base to above the melt. The barrier has an inner arm and an outer arm extending upward to form a channel therebetween. The shield extends downward between the inner arm and the outer arm to inhibit passage of contaminants.Type: GrantFiled: July 25, 2014Date of Patent: October 25, 2016Assignee: SunEdison, Inc.Inventor: Tirumani Swaminathan
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Publication number: 20160024685Abstract: A system for growing a crystal ingot from a melt is provided. The system includes a crucible assembly, a first heater, a second heater, and a passive heater. The crucible assembly includes a crucible and a weir separating an outer melt zone of the melt from an inner melt zone of the melt. The first heater is configured to supply thermal energy to the melt by conduction through the crucible. The second heater is configured to generate thermal radiation. The passive heater is configured to supply thermal energy to the outer melt zone by transferring thermal radiation generated by the second heater to the outer melt zone.Type: ApplicationFiled: July 25, 2014Publication date: January 28, 2016Inventor: Tirumani Swaminathan
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Publication number: 20160024686Abstract: A method for growing a crystal ingot from a melt in a crystal growing system is provided. The system includes a crucible and a barrier disposed within the crucible. The method includes identifying a Peclet number (Pe) with an advective transport rate that is less than a diffusive transport rate, calculating a cross-sectional area of a passage to be formed in the barrier based on the identified Peclet number to allow outward diffusion of impurities through the passage during growth of the crystal ingot, and growing the crystal ingot using the barrier having the passage formed therein.Type: ApplicationFiled: July 25, 2014Publication date: January 28, 2016Inventors: Tirumani Swaminathan, Harold Korb
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Publication number: 20160024684Abstract: A system for growing a crystal ingot from a melt is provided. The system includes a first crucible, a barrier, and a shield. The first crucible has a first base and a first sidewall forming a first cavity for containing the melt. The barrier is disposed within the first cavity of the first crucible to inhibit movement of the melt from outward of the barrier to inward of the barrier. The barrier extends from the first base to above the melt. The barrier has an inner arm and an outer arm extending upward to form a channel therebetween. The shield extends downward between the inner arm and the outer arm to inhibit passage of contaminants.Type: ApplicationFiled: July 25, 2014Publication date: January 28, 2016Inventor: Tirumani Swaminathan