Patents by Inventor Sai Reddy Pinappu
Sai Reddy Pinappu 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: 20240132787Abstract: Non-acidic sulfur compounds (e.g., thiols) can be selectively extracted from a hydrocarbon stream containing them (e.g., crude oil) by contacting the hydrocarbon stream with a carbonate solvent that contains at least one organic carbonate (e.g., propylene carbonate) in an amount effective to selectively absorb and extract the non-acidic sulfur compounds therefrom. The carbonate solvent may optionally also comprise an additional solvent (e.g., caprolactam), a soluble metal salt (e.g., a metal salt where the metal is iron), and/or a mercaptan scavenger that is a heterocyclic amine (e.g., oxazolidine).Type: ApplicationFiled: October 5, 2022Publication date: April 25, 2024Applicant: Baker Hughes Oilfield Operations LLCInventors: Sankaran Murugesan, Jerry J. Weers, Sai Reddy Pinappu, Onome Ugono, Kekeli A. Ekoue-Kovi
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Publication number: 20240109799Abstract: It is a continuing goal to reduce the amount of sludge produced in a biorefinery while also improving oil quality and water quality. In one aspect, an exemplary method of minimizing sludge from biorefineries includes the steps of feeding a source feedstock into a degumming centrifuge, where the source feedstock is separated into wet oil and a primary sludge stream, and conveying a portion of the primary sludge stream to a three-phase centrifuge. At the three-phase centrifuge, the portion of the primary sludge stream is separated into recovered centrifuge oil, which is retrieved; centrifuged water, which is conveyed to a wastewater treatment plant; and centrifuged sludge. The remainder of the primary sludge stream is conveyed to a gravity separator, where the remainder of the primary sludge stream is separated into recovered oil and residual sludge. The residual oil is retrieved from the gravity separator.Type: ApplicationFiled: September 28, 2023Publication date: April 4, 2024Applicant: Baker Hughes Oilfield Operations LLCInventors: Sankaran Murugesan, Jerry j. Weers, Sai Reddy Pinappu, Jeffery K. Bolton, James E. Klolbassa, Rolando P. Perez
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Patent number: 11879100Abstract: Catalyst fines can be removed from heavy oils, such as marine fuel oils, by introducing an additive in an effective amount to at least partially remove the catalyst fines, where the additive is an oxyalkylated acid-catalyzed alkylphenol formaldehyde resin and/or a Mannich condensate base resin copolymer.Type: GrantFiled: April 28, 2022Date of Patent: January 23, 2024Assignee: Baker Hughes Oilfield Operations LLCInventors: Sankaran Murugesan, Sai Reddy Pinappu, Jerry J. Weers, Carl E. Weaver
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Publication number: 20230348794Abstract: Catalyst fines can be removed from heavy oils, such as marine fuel oils, by introducing an additive in an effective amount to at least partially remove the catalyst fines, where the additive is an oxyalkylated acid-catalyzed alkylphenol formaldehyde resin and/or a Mannich condensate base resin copolymer.Type: ApplicationFiled: April 28, 2022Publication date: November 2, 2023Applicant: Baker Hughes Oilfield Operations LLCInventors: Sankaran Murugesan, Sai Reddy Pinappu, Jerry J. Weers, Carl E. Weaver
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Publication number: 20230166992Abstract: A method for selective extraction of lithium from geothermal brines using host-guest complexes of host molecules such as calixarene, dendrimeric polymers, hyper-branched polymers, and/or acid-catalyzed resins complexed with synergists such as organic acids, condensation polymers, olefin/maleic anhydride copolymers, and/or chelants.Type: ApplicationFiled: November 30, 2021Publication date: June 1, 2023Applicant: Baker Hughes Oilfield Operations LLCInventors: Sankaran Murugesan, Mary Jane Legaspi Felipe, Jerry J. Weers, Onome Ugono, Kekeli A. Ekoue-Kovi, Sai Reddy Pinappu
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Patent number: 11491466Abstract: A regeneration solvent comprised of one or more ethylene amines may contact an adsorbent bed that has been used to remove sulfur compounds from a hydrocarbon stream to extract adsorbed sulfur compounds from the adsorbent material in the bed to regenerate it. The one or more ethyleneamines may have structure (I), (II), or (III): where R1, R2, R5 and R6 are, to the extent chemically possible, independently H, C1-C4 linear or branched alkyl, amido (RRNC?O), or hydroxyalkyl, where each R in the amido group is independently H or C1 alkyl, where R3 and R4 are alkylene of from 1 to 4 carbon atoms, where x ranges from 0 to 3, y ranges from 1 to 6. The regenerated adsorbent bed may be reused, either alone or in combination with a liquid-liquid extraction column, to remove sulfur compounds from a hydrocarbon stream.Type: GrantFiled: April 29, 2021Date of Patent: November 8, 2022Assignee: Baker Hughes Oilfield Operations LLCInventors: Sai Reddy Pinappu, Jerry J. Weers
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Patent number: 11331649Abstract: A solvent comprised of (1) a caustic and an alcohol, (2) a caustic and a quaternary ammonium hydroxide, or (3) a caustic, an alcohol, and a quaternary ammonium hydroxide may contact an adsorbent bed that has been used to remove sulfur compounds from a hydrocarbon stream to extract adsorbed sulfur compounds from the adsorbent material in the bed to regenerate it. The regenerated adsorbent bed may be reused, either alone or in combination with a liquid-liquid extraction column, to remove sulfur compounds from a hydrocarbon stream.Type: GrantFiled: July 24, 2020Date of Patent: May 17, 2022Assignee: Baker Hughes Oilfield Operations LLCInventors: Sai Reddy Pinappu, Jerry J. Weers, Timothy J. O'Brien, Waynn C. Morgan
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Patent number: 11261385Abstract: An extraction solvent comprised of one or more ethyleneamines having structure (I), (II), or (III): where R1-R6 can independently be H, C1-C4 linear or branched alkyl, amido (RRNC?O), or hydroxyalkyl, where each R in the amido group independently H or C1 alkyl, and where x ranges from 1 to 6, may be contacted with a hydrocarbon stream to remove or extract non-acidic contaminants, such as thiophenes, benzothiophenes, alkyl sulfides, alkyl disulfides, mercaptans, aromatics, oxygenates, metals, olefins, and combinations thereof, from the hydrocarbon stream. The extraction solvent may include co-solvents and the hydrocarbon stream may be in gas and/or liquid form.Type: GrantFiled: September 30, 2020Date of Patent: March 1, 2022Assignee: Baker Hughes Holdings LLCInventors: Paul J. Biggerstaff, Jerry J. Weers, Sai Reddy Pinappu, Weldon J. Cappel
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Publication number: 20220023835Abstract: A regeneration solvent comprised of one or more ethylene amines may contact an adsorbent bed that has been used to remove sulfur compounds from a hydrocarbon stream to extract adsorbed sulfur compounds from the adsorbent material in the bed to regenerate it. The one or more ethyleneamines may have structure (I), (II), or (III): where R1, R2, R5 and R6 are, to the extent chemically possible, independently H, C1-C4 linear or branched alkyl, amido (RRNC?O), or hydroxyalkyl, where each R in the amido group is independently H or C1 alkyl, where R3 and R4 are alkylene of from 1 to 4 carbon atoms, where x ranges from 0 to 3, y ranges from 1 to 6. The regenerated adsorbent bed may be reused, either alone or in combination with a liquid-liquid extraction column, to remove sulfur compounds from a hydrocarbon stream.Type: ApplicationFiled: April 29, 2021Publication date: January 27, 2022Applicant: Baker Hughes Oilfield Operations LLCInventors: Sai Reddy Pinappu, Jerry J. Weers
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Publication number: 20220023834Abstract: A solvent comprised of (1) a caustic and an alcohol, (2) a caustic and a quaternary ammonium hydroxide, or (3) a caustic, an alcohol, and a quaternary ammonium hydroxide may contact an adsorbent bed that has been used to remove sulfur compounds from a hydrocarbon stream to extract adsorbed sulfur compounds from the adsorbent material in the bed to regenerate it. The regenerated adsorbent bed may be reused, either alone or in combination with a liquid-liquid extraction column, to remove sulfur compounds from a hydrocarbon stream.Type: ApplicationFiled: July 24, 2020Publication date: January 27, 2022Applicant: Baker Hughes Oilfield Operations LLCInventors: Sai Reddy Pinappu, Jerry J. Weers, Timothy J. O'Brien, Waynn C. Morgan
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Patent number: 11168265Abstract: A method of removing a metal contaminant from a light hydrocarbon stream comprises introducing a light hydrocarbon stream into a reactor vessel, the reactor vessel containing an aqueous treatment composition which comprises a treatment agent comprising one or more of the following: an alkali metal salt of a thiocarbonate; an alkaline earth metal salt of a thiocarbonate; an alkali metal salt of a tetrathioperoxy carbonate; or an alkaline earth metal salt of a tetrathioperoxy carbonate, the light hydrocarbon stream having an API gravity of greater than 28 degree determined in accordance with ASTM D 287-12 and comprising a metal contaminant; contacting the light hydrocarbon stream with the aqueous treatment composition generating a treated light hydrocarbon stream with a reduced level of the metal contaminant; and removing the treated light hydrocarbon stream from the reactor vessel.Type: GrantFiled: January 14, 2020Date of Patent: November 9, 2021Assignee: BAKER HUGHES OILFIELD OPERATIONS LLCInventors: Waynn Morgan, Jerry Weers, James Kiolbassa, Timothy O'Brien, Sai Reddy Pinappu, Tran minh Nguyen
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Publication number: 20210214621Abstract: A method of removing a metal contaminant from a light hydrocarbon stream comprises introducing a light hydrocarbon stream into a reactor vessel, the reactor vessel containing an aqueous treatment composition which comprises a treatment agent comprising one or more of the following: an alkali metal salt of a thiocarbonate; an alkaline earth metal salt of a thiocarbonate; an alkali metal salt of a tetrathioperoxy carbonate; or an alkaline earth metal salt of a tetrathioperoxy carbonate, the light hydrocarbon stream having an API gravity of greater than 28 degree determined in accordance with ASTM D 287-12 and comprising a metal contaiminant; contacting the light hydrocarbon stream with the aqueous treatment composition generating a treated light hydrocarbon stream with a reduced level of the metal contaminant; and removing the treated light hydrocarbon stream from the reactor vessel.Type: ApplicationFiled: January 14, 2020Publication date: July 15, 2021Applicant: Baker Hughes Oilfield Operations LLCInventors: Waynn Morgan, Jerry Weers, James Kiolbassa, Timothy O'Brien, Sai Reddy Pinappu, Tran minh Nguyen
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Publication number: 20210009905Abstract: An extraction solvent comprised of one or more ethyleneamines having structure (I), (II), or (III): where R1-R6 can independently be H, C1-C4 linear or branched alkyl, amido (RRNC?O), or hydroxyalkyl, where each R in the amido group independently H or C1 alkyl, and where x ranges from 1 to 6, may be contacted with a hydrocarbon stream to remove or extract non-acidic contaminants, such as thiophenes, benzothiophenes, alkyl sulfides, alkyl disulfides, mercaptans, aromatics, oxygenates, metals, olefins, and combinations thereof, from the hydrocarbon stream. The extraction solvent may include co-solvents and the hydrocarbon stream may be in gas and/or liquid form.Type: ApplicationFiled: September 30, 2020Publication date: January 14, 2021Applicant: Baker Hughes, a GE company, LLCInventors: Paul J. Biggerstaff, Jerry J. Weers, Sai Reddy Pinappu, Weldon J. Cappel
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Patent number: 10822549Abstract: An extraction solvent comprised of one or more ethyleneamines having structure (I), (II), or (III): where R1-R6 can independently be H, C1-C4 linear or branched alkyl, amido (RRNC?O), or hydroxyalkyl, where each R in the amido group independently H or C1 alkyl, and where x ranges from 1 to 6, may be contacted with a hydrocarbon stream to remove or extract non-acidic contaminants, such as thiophenes, benzothiophenes, alkyl sulfides, alkyl disulfides, mercaptans, aromatics, oxygenates, metals, olefins, and combinations thereof, from the hydrocarbon stream. The extraction solvent may include co-solvents and the hydrocarbon stream may be in gas and/or liquid form.Type: GrantFiled: January 18, 2019Date of Patent: November 3, 2020Assignee: Baker Hughes Holdings LLCInventors: Paul J. Biggerstaff, Jerry J. Weers, Sai Reddy Pinappu, Weldon J. Cappel
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Publication number: 20200231881Abstract: An extraction solvent comprised of one or more ethyleneamines having structure (I), (II), or (III): where R1-R6 can independently be H, C1-C4 linear or branched alkyl, amido (RRNC?O), or hydroxyalkyl, where each R in the amido group independently H or C1 alkyl, and where x ranges from 1 to 6, may be contacted with a hydrocarbon stream to remove or extract non-acidic contaminants, such as thiophenes, benzothiophenes, alkyl sulfides, alkyl disulfides, mercaptans, aromatics, oxygenates, metals, olefins, and combinations thereof, from the hydrocarbon stream. The extraction solvent may include co-solvents and the hydrocarbon stream may be in gas and/or liquid form.Type: ApplicationFiled: January 18, 2019Publication date: July 23, 2020Applicant: Baker Hughes, a GE company, LLCInventors: Paul J. Biggerstaff, Jerry J. Weers, Sai Reddy Pinappu, Weldon J. Cappel
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Patent number: 10591396Abstract: A method is provided for determining the solubility parameters for a process stream via the joint use of turbidimetric detection of asphaltenes flocculation, which is used to determine and detect the onset flocculation of asphaltenes of the process stream, and a refractive index to determine the process stream solubility parameters such as the solubility blending number and insolubility number.Type: GrantFiled: February 3, 2017Date of Patent: March 17, 2020Assignee: BAKER HUGHES, A GE COMPANY, LLCInventors: Marco Respini, Giuseppe Della Sala, Corina Sandu, Gavin Mark Medine, Sai Reddy Pinappu
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Patent number: 10527536Abstract: A method is provided for determining the solubility parameters for a process stream via the joint use of turbidimetric detection of asphaltenes flocculation, which is used to determine and detect the onset flocculation of asphaltenes of the process stream, and a refractive index to determine the process stream solubility parameters such as the solubility blending number and insolubility number.Type: GrantFiled: April 21, 2017Date of Patent: January 7, 2020Assignee: BAKER HUGHES, A GE COMPANY, LLCInventors: Marco Respini, Giuseppe Della Sala, Corina Sandu, Gavin Mark Medine, Sai Reddy Pinappu
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Patent number: 9845434Abstract: Biological source oils, including, but not limited to, algae oil, stabilize the presence of asphaltenes in petroleum feedstocks, such as crude oil, to help avoid or prevent fouling and/or corrosion in the production, transferring and processing of the petroleum feedstocks. Chemical additives such as phenol-based resins, and reaction products or combinations of long chain alpha-olefins and/or small chain aldehydes and/or long chain alkyl phenate sulfides and/or metal oxide-based colloidal hydrocarbon-based nanodispersions, may also stabilize the presence of asphaltenes in petroleum feedstocks. By “stabilizing” is meant keeping the asphaltenes in solution in the petroleum feedstocks.Type: GrantFiled: December 19, 2016Date of Patent: December 19, 2017Assignee: Baker Hughes, a GE company, LLCInventors: Sai Reddy Pinappu, Lawrence N. Kremer, Corina L. Sandu
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Patent number: 9804076Abstract: Industrial fluids may be monitored at the site of each industrial fluid by introducing a sample of the industrial fluid into a device employing a detection technique for detecting at least one composition within the sample. The detection technique may be or include surface enhanced Raman scattering (SERS), mass spectrometry (MS), nuclear magnetic resonance (NMR), ultraviolet light (UV) spectroscopy, UV spectrophotometry, indirect UV spectroscopy, contactless conductivity, laser induced fluorescence, and combinations thereof. In one non-limiting embodiment, a separation technique may be applied to the sample prior to the introduction of the sample into the device for detecting the composition.Type: GrantFiled: March 11, 2014Date of Patent: October 31, 2017Assignee: Baker Hughes, a GE company, LLCInventors: Bradley G. Harrell, Sai Reddy Pinappu, George G. Duggan
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Publication number: 20170227434Abstract: A method is provided for determining the solubility parameters for a process stream via the joint use of turbidimetric detection of asphaltenes flocculation, which is used to determine and detect the onset flocculation of asphaltenes of the process stream, and a refractive index to determine the process stream solubility parameters such as the solubility blending number and insolubility number.Type: ApplicationFiled: April 21, 2017Publication date: August 10, 2017Applicant: BAKER HUGHES INCORPORATEDInventors: MARCO RESPINI, GIUSEPPE DELLA SALA, CORINA SANDU, GAVIN MARK MEDINE, SAI REDDY PINAPPU