Patents Assigned to Chevron U.S.A.
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Publication number: 20240151141Abstract: A method is described to detect, analyze, and characterize fracture driven interaction (FDI) events in unconventional resources using production data from a well and its nearest neighbors. The method provides a rigorous statistical analysis of the production data of a well and its nearest neighbors, and utilizes a combination of signals including pressure, rate, water-oil ratio (WOR), and fluid production to identify and characterize FDI events. The method is executed by a computer system.Type: ApplicationFiled: November 1, 2023Publication date: May 9, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Larry A. BOWDEN, Edgar DIAS
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Publication number: 20240149250Abstract: An improved hydrotreating catalyst and process for making a base oil product wherein the catalyst comprises a base extrudate that includes a high nanopore volume amorphous silica alumina (ASA) and an alumina. The catalyst and process generally involve the use of a high nanopore volume ASA/alumina based catalyst to produce hydrotreated dewaxed base oil products by contacting the catalyst with a hydrocarbon feedstock. The catalyst base extrudate advantageously comprises an amorphous silica alumina having a pore volume in the 11-20 nm pore diameter range of 0.2 to 0.9 cc/g and an alumina having, a pore volume in the 11-20 nm pore diameter range of 0.01 to 1.0 cc/g, with the base extrudate formed from the amorphous silica alumina and the alumina having a total pore volume in the 2-50 nm pore diameter range of 0.12 to 1.80 cc/g. The catalyst further comprises at least one modifier element from Groups 6 to 10 and Group 14 of the Periodic Table. The catalyst and process provide improved aromatics saturation.Type: ApplicationFiled: March 10, 2022Publication date: May 9, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Guan-Dao LEI
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Patent number: 11976521Abstract: A centralizer for use in high speed rotor dynamics applications includes a housing having a first end portion and a second end portion. The centralizer further includes a rotatable shaft positioned within a cavity of the housing. The centralizer also includes flexure springs that are each attached to and extend between the first end portion and the second end portion. The flexure springs are compressible toward a middle portion of the housing that is between the first end portion and the second end portion. The centralizer further includes roller wheels attached to the flexure springs.Type: GrantFiled: July 30, 2020Date of Patent: May 7, 2024Assignee: Chevron U.S.A. Inc.Inventor: James Daniel Montoya
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Patent number: 11976916Abstract: An optical strain gauge system measures strain on the exterior surface of a pipe to identify areas of wear on the interior surface of the pipe. The optical strain gauge system comprises an optical sensing interrogator and at least one optical fiber. The optical sensing interrogator comprises a light source and a light sensor. The at least one optical fiber includes fiber Bragg gratings along the length of the optical fiber. The optical fiber is arranged on the exterior surface of the pipe with the fiber Bragg gratings forming a two-dimensional array of points at which strain measurements are obtained. The two-dimensional array of strain measurement points provides an accurate assessment of the strains on the exterior of the pipe which can be used to identify areas of wear on the interior surface of the pipe.Type: GrantFiled: June 30, 2021Date of Patent: May 7, 2024Assignee: CHEVRON U.S.A. INC.Inventors: Baha Tanju, Hariprasad Janakiram Subramani, Peter Crowder, Lee Rhyne, Nikolaos Ioannis Salmatanis, Pedro Vargas, Milind L. Prabhu
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Patent number: 11964926Abstract: A process for producing high octane alkylate is provided. The process involves reacting isobutane and ethylene using an ionic liquid catalyst. Reaction conditions can be chosen to assist in attaining, or to optimize, desirable alkylate yields and/or properties.Type: GrantFiled: September 28, 2022Date of Patent: April 23, 2024Assignee: CHEVRON U.S.A. INC.Inventors: Bong-Kyu Chang, Hye-Kyung Cho Timken, Huping Luo
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Patent number: 11964875Abstract: A method is provided for synthesizing *MRE molecular sieves using an organic structure directing agent which comprises a 1-ethylpyridinium cation.Type: GrantFiled: March 24, 2022Date of Patent: April 23, 2024Assignee: CHEVRON U.S.A. INC.Inventors: Dan Xie, Kurt Owen Jensen, Adeola Florence Ojo
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Publication number: 20240123433Abstract: Provided is a process for hydrocracking normal paraffins into lighter normal paraffins with minimal formation of iso-paraffins. The process comprises hydrocracking a hydrocarbon feedstock comprising normal paraffins under hydrocracking conditions. The reaction is run in the presence of a selected catalyst, e.g., an LTA-type zeolite, with a requisite topology and acid site density. The zeolite has a framework type with voids greater than 0.50 nm in diameter, which are accessible through apertures characterized by a longest diameter of less than 0.50 nm and a shortest diameter of more than 0.30 nm. The reaction conducted in the presence of such a selected zeolite produces an n-paraffin rich product.Type: ApplicationFiled: December 29, 2021Publication date: April 18, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Cong-Yan CHEN, Theodorus Ludovicus Michael MAESEN, Tracy Margaret DAVIS, Dan XIE
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Patent number: 11959025Abstract: A continuous process for converting waste plastic into recycle for polypropylene polymerization is provided. The process integrates refinery operations to provide an effective and efficient recycle process. The process comprises selecting waste plastics containing polyethylene and polypropylene and then passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a naphtha/diesel fraction, a heavy fraction, and char. The naphtha/diesel fraction is passed to a refinery FCC unit, from which is recovered a liquid petroleum gas C3 olefin/paraffin mixture. The C3 paraffins and C3 olefins are separated into different fractions with a propane/propylene splitter. The C3 olefin fraction is passed to a propylene polymerization reactor.Type: GrantFiled: October 30, 2022Date of Patent: April 16, 2024Assignee: CHEVRON U.S.A INC.Inventor: Hye-Kyung Timken
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Publication number: 20240117256Abstract: An improved process for making a heavy base oil from a base oil feedstream comprising an atmospheric resid feedstock, and, optionally, a base oil feedstock, via hydroprocessing. The process generally involves subjecting a base oil feedstream comprising the atmospheric resid to hydrocracking and dewaxing steps, and optionally to hydrofinishing, to produce base oil product(s) including a heavy grade base oil product having a viscosity of at least about 12.7 cSt at 100° C. The invention is useful to make heavy grade base oil products, as well as Group II and/or Group III/III+ base oils.Type: ApplicationFiled: January 26, 2022Publication date: April 11, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Horacio TREVINO, Minghui ZHANG, Guan-Dao LEI, Luyen T. VO
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Patent number: 11951458Abstract: Bulk catalysts comprised of nickel, molybdenum, tungsten and titanium and methods for synthesizing bulk catalysts are provided. The catalysts are useful for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.Type: GrantFiled: June 29, 2023Date of Patent: April 9, 2024Assignee: Chevron U.S.A. Inc.Inventors: Xiaoying Ouyang, Viorel Duma, Alexander Kuperman, Ibrahim Uckung, Theodorus Ludovicus Michael Maesen, Axel Brait, Charles Wilson
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Publication number: 20240110120Abstract: A method for making a base oil having enhanced color stability and the base oil prepared therefrom are disclosed. The method comprises adding a phenyl benzotriazole compound to a base oil composition to form a color-stabilized base oil composition. In some cases, the phenyl benzotriazole compound has the structural formula (I): wherein, R and R? are independently one or more substituents selected from hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted cycloalkyl, substituted and unsubstituted alkoxy, substituted and unsubstituted carboxyl, or a combination thereof, with the proviso that at least one of R and R? is a non-hydrogen substituent.Type: ApplicationFiled: January 18, 2022Publication date: April 4, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Guan-Dao LEI, Malek M. ROSTAMI, Beth A. RUSSELL
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Publication number: 20240101912Abstract: An improved hydroisomerization catalyst and process for making a base oil product using a catalyst comprising SSZ-91 molecular sieve and ZSM-12 molecular sieve. The catalyst and process generally involves the use of a catalyst comprising an SSZ-91 molecular sieve combined with a ZSM-12 molecular sieve to produce dewaxed base oil products by contacting the catalyst with a hydrocarbon feedstock. The catalyst and process provide improved base oil cold properties, such as pour point and cloud point, along with other beneficial base oil properties.Type: ApplicationFiled: November 22, 2021Publication date: March 28, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Adeola OJO, Guan-Dao LEI
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Publication number: 20240100513Abstract: A method for making a hydroisomerization catalyst having improved thermal stability and metal dispersion characteristics, the catalyst prepared therefrom, and a process for making a base oil product using the catalyst are disclosed. The catalyst is prepared from a composition comprising an SSZ-91 molecular sieve and a rare earth modified alumina, with the composition being modified to contain a Group 8-10 metal, typically through impregnation of a Group 8-10 metal composition. The catalyst may be used to produce dewaxed base oil products by contacting the catalyst under hydroisomerization conditions with a hydrocarbon feedstock.Type: ApplicationFiled: December 20, 2021Publication date: March 28, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Yihua ZHANG, Adeola OJO, Guan-Dao LEI
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Publication number: 20240101913Abstract: Provided is a hydrocracking process with a recycle loop for converting a petroleum feed to lower boiling products, which process comprises reacting a stream over a non-zeolite noble metal catalyst at a temperature of about 650° F. (343° C.) or less in a reactor positioned in the recycle loop of the hydrocracking reactor.Type: ApplicationFiled: December 29, 2021Publication date: March 28, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Ling JIAO, Bi-Zheng ZHAN, Don BUSHEE, Theodorus Ludovicus Michael MAESEN, Hye-Kyung TIMKEN, Richard DUTTA, Jay PAREKH
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Patent number: 11939524Abstract: Disclosed are compositions and methods for the pressure protection of existing wells during infill drilling operations.Type: GrantFiled: August 19, 2022Date of Patent: March 26, 2024Assignee: CHEVRON U.S.A. INC.Inventors: Samiha Said Elsayed Morsy, Nabijan Nizamidin, Taimur Malik, Mohsen S. Tagavifar
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Patent number: 11939537Abstract: An improved reforming process for producing aromatic hydrocarbons is disclosed. The process includes two reformers arranged in parallel flow configuration, with the first reformer being a conventional reformer comprising a catalyst selective for reforming C8+ hydrocarbons to a reformate and the second reformer comprising a catalyst selective for reforming C7? hydrocarbons to a reformate. In certain embodiments, the first reformer catalyst comprises a conventional alumina catalyst and the second reformer catalyst comprises a ZSM-5 catalyst.Type: GrantFiled: April 21, 2020Date of Patent: March 26, 2024Assignee: Chevron U.S.A. Inc.Inventors: Cong-Yan Chen, Emmanuel Behraz
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Patent number: 11939527Abstract: Provided in one embodiment is a continuous process for converting waste plastic into recycle for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene, and passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a pyrolysis oil and optionally pyrolysis wax comprising a naphtha/diesel fraction and heavy fraction, and char. The pyrolysis oil and wax is passed to a refinery FCC feed pretreater unit. A heavy fraction is recovered and sent to a refinery FCC unit, from which a C3 olefin/paraffin mixture fraction is recovered, which is passed to a steam cracker for ethylene production. In another embodiment, a propane fraction (C3) is recovered from a propane/propylene splitter and passed to the steam cracker.Type: GrantFiled: October 30, 2022Date of Patent: March 26, 2024Assignee: Chevron U.S.A. Inc.Inventors: Hye-Kyung Timken, Cameron McCord
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Publication number: 20240091750Abstract: A novel synthetic crystalline molecular sieve material, designated boron SSZ-41 is provided. The boron SSZ-41 is a boronzincosilicate molecular sieve having the framework structure of SSZ-41. It can be synthesized using 1,1?-(1,4-butanediyl)bis[4-aza-1-azoniabicyclo[2.2.2]octane] dications as a structure directing agent. The boronzincosilicate SSZ-41 may be used in organic compound conversion reactions and/or sorptive processes.Type: ApplicationFiled: August 30, 2023Publication date: March 21, 2024Applicant: Chevron U.S.A. Inc.Inventors: Stacey I. ZONES, Cong-Yan CHEN
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Patent number: 11932547Abstract: An organotemplate-free synthetic process for synthesizing an aluminosilicate molecular sieve SSZ-122 is provided. The process includes (1) preparing a reaction mixture comprising: (a) a silicon atom source; (b) an aluminum atom source; (c) a source of an alkali metal [M]; (d) a source of hydroxide ions; (e) water; and (f) seed crystals; and (2) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the aluminosilicate molecular sieve.Type: GrantFiled: March 10, 2022Date of Patent: March 19, 2024Assignee: CHEVRON U.S.A. INC.Inventor: Dan Xie
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Publication number: 20240084204Abstract: An improved process for making a bright stock base oil from a base oil feedstream comprising an atmospheric resid feedstock, and, optionally, a base oil feedstock, via hydroprocessing. The process generally involves subjecting a base oil feedstream comprising the atmospheric resid to hydrocracking and dewaxing steps, and optionally to hydrofinishing, to produce base oil product(s) including a bright stock grade base oil product having a viscosity of at least about 22 cSt at 100° C. The invention is useful to make heavy grade base oil products such as bright stock, as well as Group II and/or Group III/III+ base oils.Type: ApplicationFiled: January 26, 2022Publication date: March 14, 2024Applicant: CHEVRON U.S.A. INC.Inventors: Horacio TREVINO, Minghui ZHANG, Guan-Dao LEI, Thomas Ralph FARRELL