Patents Assigned to Chevron U.S.A. Inc.
  • Publication number: 20230382748
    Abstract: A novel synthetic crystalline aluminogermanosilicate molecular sieve material, designated SSZ-117x, is provided which exhibits increased acidity. The SSZ-117x can be synthesized using N,N,N,3,5-pentamethyladamantan-1-ammonium cations as a structure directing agent. The synthesis employs a boron pathway to achieve increased acid sites. The SSZ-117x of increased acidity may be used in organic compound conversion reactions and/or sorptive processes.
    Type: Application
    Filed: May 30, 2023
    Publication date: November 30, 2023
    Applicant: Chevron U.S.A. Inc.
    Inventor: Stacey I. Zones
  • Publication number: 20230382744
    Abstract: A novel synthetic crystalline borongermanosilicate molecular sieve material, designated boron SSZ-117x, is provided. The boron SSZ-117x can be synthesized using N,N,N,3,5-pentamethyladamantan-1-ammonium cations as a structure directing agent. The synthesis employs a boron pathway to achieve the boron molecular sieve. The boron SSZ-117x may be used in organic compound conversion reactions, such as reforming, and/or sorptive processes.
    Type: Application
    Filed: May 30, 2023
    Publication date: November 30, 2023
    Applicant: Chevron U.S.A. Inc.
    Inventors: Stacey I. Zones, Cong-Yan Chen
  • Patent number: 11828152
    Abstract: The present disclosure provides methods and systems for hydrofracturing processes utilizing native drilling cuttings to enhance wellbore permeability. The native drilling cuttings are obtained during drilling operations and may be used in hydrofracturing applications without further grinding or processing. The native drilling cuttings can be combined into a slurry and injected into a well for the hydrofracturing application. In some cases, the native drilling cuttings are dried before combining them with the slurry.
    Type: Grant
    Filed: April 15, 2021
    Date of Patent: November 28, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Robert Neil Trotter, Caleb Kimbrell Carroll, Harold Gordon Riordan, Leonardo F. Chaves Leal, Matthew David Sonnier, Jonathon Donald Fisher, Harry Martin Fernau, John Thomas Lattal, Amos Sunghyun Kim
  • Patent number: 11826721
    Abstract: Metal nanoparticle-deposited, nitrogen-doped carbon adsorbents are disclosed, along with methods of removing sulfur compounds from a hydrocarbon feed stream using these adsorbents.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: November 28, 2023
    Assignees: CHEVRON U.S.A. INC., TRIAD NATIONAL SECURITY, LLC
    Inventors: Bi-Zeng Zhan, Zunqing He, Hoon Taek Chung, Piotr Zelenay
  • Patent number: 11828171
    Abstract: A method is described for predicting and preventing wellbore interactions at wells that are near the injection well. The method includes receiving fiber optics data; performing object detection by detecting object-like events in the fiber optic data; and sending instructions to a hydraulic fracturing system based on the object detection. The method is executed by a computer system.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: November 28, 2023
    Assignee: Chevron U.S.A. Inc.
    Inventors: Ivan Lim Chen Ning, Tamas Nemeth, David C. Bartel, Zhishuai Zhang, Yunhui Tan, Joseph P. Stefani, James P. DiSiena, Dimitri Bevc, Kelly Hughes
  • Publication number: 20230372912
    Abstract: Provided is a method of preparing a delaminated Al-SSZ-70 zeolite. The method combines direct hydrothermal synthesis with CTA+ cations and an imidazolium OSDA. A post-synthetic high shear mixing treatment is also preferred. In one embodiment, an Al-SSZ-70 zeolite seed is used, preferably with a Si/Al ratio of at least 50.
    Type: Application
    Filed: May 23, 2023
    Publication date: November 23, 2023
    Applicants: Chevron U.S.A. Inc., The Regents of the University of California
    Inventors: Alexander KATZ, Abraham MARTINEZ, Le XU, Stacey I. ZONES
  • Publication number: 20230373883
    Abstract: A process for producing renewable distillate-range hydrocarbons is provided. The process includes dehydrating a renewable C2-C6 alcohol feedstock to produce an olefin, oligomerizing the olefin the presence of a halometallate ionic liquid catalyst to produce an oligomer product and hydrogenating the oligomer product or fractions thereof to produce saturated distillate-range hydrocarbons.
    Type: Application
    Filed: March 2, 2023
    Publication date: November 23, 2023
    Applicant: Chevron U.S.A. Inc.
    Inventors: Bong Kyu CHANG, Hye-Kyung Cho TIMKEN, Michelle K. Young
  • Patent number: 11822030
    Abstract: A method is described for seismic depth uncertainty analysis including receiving wavelet basis functions and cutoff thresholds and randomly perturbing wavelet coefficients in reduced wavelet space based on the wavelet basis functions and the cutoff thresholds to generate a plurality of random wavelet fields; receiving a reference model in a depth domain; transforming the plurality of random wavelet fields to the depth domain and combining them with the reference model to form candidate models; performing a hierarchical Bayesian modeling with Markov Chain Monte Carlo (MCMC) sampling methods using the candidate models as input to generate a plurality of realizations; and computing statistics of the plurality of realizations to estimate depth uncertainty. The method may be executed by a computer system.
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: November 21, 2023
    Assignee: Chevron U.S.A. Inc.
    Inventors: Jinsong Chen, Huafeng Liu, Andrey Hanan Shabelansky, Cory James Hoelting, Min Yang, Ying Tan, Maisha Lara Amaru
  • Patent number: 11807610
    Abstract: A process for removing heavy polycyclic aromatic contaminants from a hydrocarbon stream using a quinolinium ionic liquid is described. The process includes contacting the hydrocarbon stream comprising the contaminant with a hydrocarbon-immiscible quinolinium ionic liquid to produce a mixture comprising the hydrocarbon and a hydrocarbon-immiscible quinolinium ionic liquid comprising at least a portion of the removed contaminant; and separating the mixture to produce a hydrocarbon effluent having a reduced level of the contaminant and a hydrocarbon-immiscible quinolinium ionic liquid effluent comprising the hydrocarbon-immiscible quinolinium ionic liquid comprising at least the portion of the removed contaminant.
    Type: Grant
    Filed: February 8, 2022
    Date of Patent: November 7, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Saleh Ali Elomari, Huping Luo, Timi Pravin Singa
  • Publication number: 20230347324
    Abstract: 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: Application
    Filed: June 29, 2023
    Publication date: November 2, 2023
    Applicant: Chevron U.S.A. Inc.
    Inventors: Xiaoying OUYANG, Viorel DUMA, Alexander KUPERMAN, Ibrahim UCKUNG, Theodorus Ludovicus Michael MAESEN, Axel BRAIT, Charles WILSON
  • Publication number: 20230348289
    Abstract: A process of making a silica-alumina composition having improved properties is provided. The process includes (a) mixing an aqueous solution of a silicon compound and an aqueous solution of an aluminum compound and an acid, while maintaining a pH of the mixed solution in a range of 1 to 3, and obtaining an acidified silica-alumina sol; (b) adding an aqueous solution of a base precipitating agent to the acidified silica-alumina sol to a final pH in a range of 5 to 8, and co-precipitating a silica-alumina slurry, wherein the base precipitating agent is selected from ammonium carbonate, ammonium bicarbonate, and any combination thereof; (c) optionally, hydrothermally aging the silica-alumina slurry to form a hydrothermally aged silica-alumina slurry; and (d) recovering a precipitate solid from the silica-alumina slurry or the hydrothermally aged silica-alumina slurry, wherein the precipitate solid comprises the silica-alumina composition.
    Type: Application
    Filed: June 29, 2023
    Publication date: November 2, 2023
    Applicant: Chevron U.S.A. Inc.
    Inventors: Kandaswamy JOTHIMURUGESAN, Hye-Kyung TIMKEN
  • Publication number: 20230348342
    Abstract: Provided 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 preparing a blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery hydrocracking unit. A liquid petroleum gas C3-C4 olefin/paraffin mixture, and optionally naphtha, is recovered from the hydrocracking unit and passed to a steam cracker to make ethylene. A heavy fraction can also be recovered from the hydrocracking unit and passed to an isomerization dewaxing unit to prepare base oil.
    Type: Application
    Filed: March 30, 2023
    Publication date: November 2, 2023
    Applicant: Chevron U.S.A. Inc.
    Inventor: Hye-Kyung C. TIMKEN
  • Publication number: 20230348798
    Abstract: An improved process and catalyst system for making a base oil product and for improving base oil cloud point and pour point characteristics, while also providing good product yields. The process and catalyst system generally involves the use of a layered catalyst system comprising an SSZ-91 catalyst and an SSZ-32X catalyst arranged to sequentially contact a hydrocarbon feedstock with both catalysts and thereby provide dewaxed base oil products.
    Type: Application
    Filed: August 30, 2021
    Publication date: November 2, 2023
    Applicant: CHEVRON U.S.A. INC.
    Inventors: Subhasis BHATTACHARYA, Yihua ZHANG, Guan-Dao LEI, Ajit R. PRADHAN
  • Patent number: 11802255
    Abstract: Disclosed herein are improved lubricating compositions effective to prevent or reduce low speed pre-ignition in an engine, as well as to prevent or reduce corrosion of engine components. The lubricating compositions include a base oil combined with a calcium chelate complex, optionally in further combination with additional additives.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: October 31, 2023
    Assignees: CHEVRON ORONITE COMPANY LLC, CHEVRON U.S.A. INC.
    Inventors: Ian G. Elliott, Amir Gamal Maria, Richard Eugene Cherpeck, Theresa Liang Gunawan
  • Patent number: 11802236
    Abstract: Disclosed are compositions and methods for the pressure protection of existing wells during infill drilling operations.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: October 31, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Ruth Ellen Hahn, Taimur Malik, Samiha Said Elsayed Morsy, Nabijan Nizamidin, Mohsen S. Tagavifar
  • Patent number: 11796705
    Abstract: A method is described for inverting seismic data including obtaining well logs representative of subsurface volumes of interest; generating an amplitude variation with angle (AVA) database from the well logs by seismic modeling, wherein the seismic modeling is performed a plurality of times for all combinations of fluid substitutions of brine, oil, and gas and low porosity, mid-porosity, and high porosity; generating a trained AVA model using the AVA database; obtaining a seismic dataset; calibrating the seismic dataset; computing seismic attributes for the calibrated seismic dataset using statistics for AVA classification; and generating direct hydrocarbon indicators as a function of position in the subsurface volume of interest by applying the trained AVA model to the seismic attributes. The method is executed by a computer system.
    Type: Grant
    Filed: April 6, 2021
    Date of Patent: October 24, 2023
    Assignee: Chevron U.S.A. Inc.
    Inventors: Prasenjit Roy, Xinfa Zhu
  • Patent number: 11790170
    Abstract: A computer-implemented, machine learning-based method of converting an unstructured technical report into a structured technical report includes obtaining an unstructured technical report, tokenizing the unstructured technical report into an n-gram array, identifying and filtering non-interesting n-grams from the first n-gram array based on common language usage of the non-interesting n-grams and a determination that the non-interesting n-grams do not appear on a confirmed technical entity database, generating and displaying a technical entity candidate list from the filtered n-gram array, displaying, obtaining, from a pattern matching model and/or a graphical user interface, an indication that a technical entity candidate is a technical entity of interest, appending the technical entity of interest to the confirmed technical entity database, generating and displaying a structured technical report with the confirmed technical entities and corresponding technical entity value parameters, and iterating the proc
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: October 17, 2023
    Assignees: CHEVRON U.S.A. INC., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Asitang Mishra, Shuxing Cheng, Annie Didier, Chris Mattmann, Hamsa Shwetha Venkataram, Grant Lee, Wayne Moses Burke, Vishal Lall
  • Patent number: 11787701
    Abstract: A process of making a silica-alumina composition having improved properties is provided. The process includes (a) mixing an aqueous solution of a silicon compound and an aqueous solution of an aluminum compound and an acid, while maintaining a pH of the mixed solution in a range of 1 to 3, and obtaining an acidified silica-alumina sol; (b) adding an aqueous solution of a base precipitating agent to the acidified silica-alumina sol to a final pH in a range of 5 to 8, and co-precipitating a silica-alumina slurry, wherein the base precipitating agent is selected from ammonium carbonate, ammonium bicarbonate, and any combination thereof; (c) optionally, hydrothermally aging the silica-alumina slurry to form a hydrothermally aged silica-alumina slurry; and (d) recovering a precipitate solid from the silica-alumina slurry or the hydrothermally aged silica-alumina slurry, wherein the precipitate solid comprises the silica-alumina composition.
    Type: Grant
    Filed: July 22, 2021
    Date of Patent: October 17, 2023
    Assignee: Chevron U.S.A. Inc.
    Inventors: Kandaswamy Jothimurugesan, Hye-Kyung Timken
  • Patent number: 11787998
    Abstract: Provided herein are compositions comprising borate-acid buffers, as well as methods of using these compositions in oil and gas operations, including enhanced oil recovery (EOR) operations, fracturing operations, stimulation operations, etc.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: October 17, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Nabijan Nizamidin, Gayani W. Pinnawala, Guo-Qing Tang, Varadarajan Dwarakanath, Gregory A. Winslow, Jordan Taylor Isbell, Taimur Malik
  • Publication number: 20230323772
    Abstract: Embodiments for generating a reservoir performance forecast are provided. The embodiments may be executed by a computer system. In one embodiment, a method includes obtaining inflow performance relationship data generated from a physics-based subsurface-surface coupled simulation model having a surface, a subsurface, and one or more wells fluidly connecting the subsurface to the surface. The inflow performance relationship data comprises performance data for at least one phase of fluid for each well. The method also includes generating a performance forecast for the reservoir using a subsurface simulator and a surface simulator. The subsurface simulator uses the inflow performance relationship data to represent the subsurface during generation of the performance forecast, and the performance forecast satisfies constraints solved by the surface simulator. In one embodiment, a method does not utilize a surface simulator.
    Type: Application
    Filed: April 12, 2022
    Publication date: October 12, 2023
    Applicant: CHEVRON U.S.A. INC.
    Inventors: Changdong YANG, Jincong HE, Tsubasa ONISHI, Ronglei ZHANG, Yanbin ZHANG, Song DU, Zhenzhen WANG, Xiaoyue GUAN, Jianping CHEN, Xian-Huan WEN, Babafemi Anthony OGUNYOMI