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    DRILL-IN FLUIDS USING CALCIUM CARBONATE PARTICLES FORMED FROM SEQUESTERED CARBON DIOXIDE
    42.
    发明公开
    DRILL-IN FLUIDS USING CALCIUM CARBONATE PARTICLES FORMED FROM SEQUESTERED CARBON DIOXIDE 审中-公开

    公开(公告)号：US20240166935A1

    公开(公告)日：2024-05-23

    申请号：US18056465

    申请日：2022-11-17

    Applicant: Chevron U.S.A. Inc.

    Inventor： Sandra Liliana Gomez-Nava

    IPC: C09K8/06

    CPC classification number: C09K8/06

    Abstract: A drill-in fluid composition comprises a base fluid, a viscosifier, a fluid loss control agent, and a blend of calcium carbonate particles having at least two different sizes, wherein at least a portion of the blend of calcium carbonate particles are synthetic calcium carbonate particles formed from captured carbon dioxide. The blend of calcium carbonate particles can include natural calcium carbonate particles. The drill-in fluid composition is used when drilling a well through a formation.

    CATALYSTS AND METHODS FOR METHANE DEHYDROGENATION
    43.
    发明公开
    CATALYSTS AND METHODS FOR METHANE DEHYDROGENATION 审中-公开

    公开(公告)号：US20240166578A1

    公开(公告)日：2024-05-23

    申请号：US18221806

    申请日：2023-07-13

    Applicant: CHEVRON U.S.A. INC.

    Inventor： Xiaoying OUYANG ,  Alexander E. Kuperman ,  Huping Luo

    IPC: C07C2/76 ,  B01J21/08 ,  B01J35/00 ,  B01J35/02 ,  C01B3/26

    CPC classification number: C07C2/76 ,  B01J21/08 ,  B01J35/0013 ,  B01J35/023 ,  C01B3/26 ,  C01B2203/1241 ,  C07C2521/08

    Abstract: The present application pertains to a methane dehydrogenation process subjecting a methane feed to a novel SiO2 catalyst under dehydrogenation conditions and producing hydrogen, ethylene, an aromatic, or any mixture thereof. In another embodiment, the present application pertains to a novel catalyst for methane dehydrogenation. The catalyst comprises amorphous particles of SiO2. The amorphous particles have a particle size with a nominal diameter of from about 5 nm to 1 cm. The amorphous particles of SiO2 comprise a Lewis acidity sufficient to activate one or more C—H bonds in methane and generate one or more methyl radicals when the catalyst is subjected to methane dehydrogenation conditions. In another embodiment, the present application pertains to method of making the novel catalyst for methane dehydrogenation.

    Moving Bed Lipid Conversion With Fluid Bed Catalyst Regeneration
    45.
    发明公开
    Moving Bed Lipid Conversion With Fluid Bed Catalyst Regeneration 审中-公开

    公开(公告)号：US20240157320A1

    公开(公告)日：2024-05-16

    申请号：US18054293

    申请日：2022-11-10

    Applicant: Chevron U.S.A. Inc.

    Inventor： Steven Xuqi Song ,  Sven Ivar Hommeltoft

    IPC: B01J8/26 ,  B01J8/00 ,  B01J29/90

    CPC classification number: B01J8/26 ,  B01J8/0055 ,  B01J29/90

    Abstract: A reactor system includes a moving bed reactor that treats a lipid feedstock using a metal oxide catalyst to produce a treated stream comprising a bio-oil. The reactor system further includes a fluidized bed regenerator that regenerates spent metal oxide catalyst from the treating process in the moving bed reactor. Once the spent metal oxide catalyst is regenerated into metal oxide catalyst, it is returned to the moving bed reactor. The metal oxide catalyst returned to the moving bed reactor can contribute heat to the lipid feedstock to raise the lipid feedstock to a reaction temperature.

    GAS-LIQUID SEPARATION DEVICE FOR AN EBULLATED BED REACTOR
    46.
    发明公开
    GAS-LIQUID SEPARATION DEVICE FOR AN EBULLATED BED REACTOR 审中-公开

    公开(公告)号：US20240157274A1

    公开(公告)日：2024-05-16

    申请号：US18511835

    申请日：2023-11-16

    Applicant: CHEVRON U.S.A. INC.

    Inventor： Steven Xuqi SONG ,  Blaine HOLMES ,  Wayne MUNSTERMAN ,  Tom BERRY ,  Xiaohui ZHANG ,  Deanne KELLY ,  Ali VAKIL ,  Ehsan ZAMAN ,  Marvin WEISS ,  Matthew D. POLAND ,  Brian HANSON

    IPC: B01D19/00 ,  B01L5/02

    CPC classification number: B01D19/0057 ,  B01L5/02 ,  B01L2300/0681 ,  B01L2400/0463

    Abstract: A gas-liquid separator, adapted for separating liquid and gas in an ebullated bed reactor under operating conditions, is disclosed. The device may be used in the petroleum and chemical processing industries in catalytic reactions of hydrocarbonaceous feedstocks in the presence of hydrogen, at an elevated temperature and pressure, to separate gas and liquid from gas and liquid mixtures within the reactor. The device is generally vertically oriented and may be installed in the flow through pan of an ebullated bed reactor. The device comprises a transfer conduit for transferring a gas-liquid mixture stream from a lower section of an ebullated bed reactor to an upper section of the reactor, a vortex separation section having gas-rich and liquid-rich stream outlets, and a gas-rich stream outlet conduit located on top of and adjacent to the vortex separation section. The transfer conduit includes internal means to produce a spiral flow in the gas-liquid mixture, such as a helical or spiral insert. The vortex separation section is located at the top of the transfer conduit and includes separation means to separate the gas-liquid mixture stream into a liquid-rich stream and a gas-rich stream. A separator conduit extending from the top of the vortex separation section to the transfer conduit upper opening, aligned with and having substantially the same cross-sectional dimensions as the gas-rich stream outlet, may be used as the separation means. Among the benefits provided are improved efficiency of gas and liquid separation and reduced gas holdup within the reactor.

    High speed rotor dynamics centralizer
    48.
    发明授权
    High speed rotor dynamics centralizer 有权

    公开(公告)号：US11976521B2

    公开(公告)日：2024-05-07

    申请号：US17631816

    申请日：2020-07-30

    Applicant: Chevron U.S.A. Inc.

    Inventor： James Daniel Montoya

    IPC: E21B17/10

    CPC classification number: E21B17/1021 ,  E21B17/1028 ,  E21B17/1057

    Abstract: 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.

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