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.

公开(公告)号：US20240141238A1

公开(公告)日：2024-05-02

申请号：US18498612

申请日：2023-10-31

Applicant: CHEVRON U.S.A. INC.

Inventor： Stephen J. HARLEY ,  Rachel MOHLER ,  Peter Hillman ,  Samin Sharifiasl

IPC: C10G27/04 ,  G01N30/06 ,  G01N30/02 ,  G01N30/88

CPC classification number: C10G27/04 ,  G01N30/06 ,  C10G2300/202 ,  G01N2030/025 ,  G01N2030/067 ,  G01N2030/8854

Abstract: The present invention is directed to a method of selectively reacting and removing disulfides and reducing corrosivity in petroleum matrixes with an acid wash composition.

公开(公告)号：US20240103510A1

公开(公告)日：2024-03-28

申请号：US18271986

申请日：2022-01-13

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY ,  CHEVRON U.S.A. Inc.

Inventor： Virisha Timmaraju ,  Eric Junkins ,  Valentinos Constantinou ,  Asitang Mishra ,  Sakthivel Kandasamy

IPC: G05B23/02

CPC classification number: G05B23/027 ,  G05B23/0275

Abstract: Relationships between alarms are modeled using a graph to identify root cause of a sequence of alarms (an alarm flood). The nodes of the graph represent different alarms, and the edges between the nodes are scored using pairwise analysis of when the alarms occurred. The graph is divided into multiple subgraphs representing alarm clusters. Root cause analysis of the sequence of alarms is performed by generating and simplifying directed graphs for events within the alarm clusters.

公开(公告)号：US20240101913A1

公开(公告)日：2024-03-28

申请号：US18270202

申请日：2021-12-29

Applicant: CHEVRON U.S.A. INC.

Inventor： Ling JIAO ,  Bi-Zheng ZHAN ,  Don BUSHEE ,  Theodorus Ludovicus Michael MAESEN ,  Hye-Kyung TIMKEN ,  Richard DUTTA ,  Jay PAREKH

IPC: C10G65/12 ,  C10G7/00 ,  C10G47/14

CPC classification number: C10G65/12 ,  C10G7/00 ,  C10G47/14 ,  C10G2300/107 ,  C10G2300/1074 ,  C10G2300/4006 ,  C10G2300/4081

Abstract: 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.

公开(公告)号：US20240100513A1

公开(公告)日：2024-03-28

申请号：US18269915

申请日：2021-12-20

Applicant: CHEVRON U.S.A. INC.

Inventor： Yihua ZHANG ,  Adeola OJO ,  Guan-Dao LEI

IPC: B01J37/04 ,  B01J21/04 ,  B01J23/10 ,  B01J23/63 ,  B01J23/83 ,  B01J23/89 ,  C10G45/64

CPC classification number: B01J37/04 ,  B01J21/04 ,  B01J23/10 ,  B01J23/63 ,  B01J23/83 ,  B01J23/894 ,  C10G45/64 ,  B01J35/026

Abstract: 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.

公开(公告)号：US11928565B2

公开(公告)日：2024-03-12

申请号：US18049149

申请日：2022-10-24

Applicant: Chevron U.S.A. Inc. ,  University of Southern California

Inventor： Yining Dong ,  Alisha Deshpande ,  Yingying Zheng ,  Lisa Ann Brenskelle ,  Si-Zhao Qin

IPC: G06N20/00 ,  G05B19/406 ,  G05B19/408 ,  G05B19/418 ,  G06F9/445 ,  G06F9/455 ,  G06F9/54 ,  G06F18/2135 ,  G06F18/23 ,  G06N7/00

CPC classification number: G06N20/00 ,  G05B19/406 ,  G05B19/408 ,  G05B19/41885 ,  G06F9/542 ,  G06F18/2135 ,  G06F18/23

Abstract: Methods and systems for building and maintaining model(s) of a physical process are disclosed. One method includes receiving training data associated with a plurality of different data sources, and performing a clustering process to form one or more clusters. For each of the one or more clusters, the method includes building a data model based on the training data associated with the data sources in the cluster, automatically performing a data cleansing process on operational data based on the data model, and automatically updating the data model based on updated training data that is received as operational data. For data sources excluded from the clusters, automatic building, data cleansing, and updating of models can also be applied.

公开(公告)号：US11906505B2

公开(公告)日：2024-02-20

申请号：US17668463

申请日：2022-02-10

Applicant: CHEVRON U.S.A. INC.

Inventor： Meir R. Hasbani ,  Michelle K. Young

IPC: C10L1/04 ,  G01T1/20 ,  G01N33/28

CPC classification number: G01N33/2882 ,  C10L1/04 ,  G01T1/20 ,  C10G2300/4037 ,  C10L2200/0407 ,  C10L2200/0476 ,  C10L2290/60

Abstract: A method of monitoring renewable carbon in fuel streams in a refinery or blend facility while co-processing a bio-feedstock with a fossil feedstock or blending a renewable product with a fossil product wherein the method provides for quantification of renewable C14 carbon content to adjust the total renewable content to a targeted renewable content in situ while lowering the limit of detection.

公开(公告)号：US11905461B2

公开(公告)日：2024-02-20

申请号：US16922999

申请日：2020-07-07

Applicant: Chevron U.S.A. Inc.

Inventor： Varadarajan Dwarakanath ,  Taimur Malik ,  Lin Zuo ,  Jimin Daniel Zhou ,  Nabijan Nizamidin ,  Gregory A. Winslow ,  Reza Banki ,  Mohamad Salman

IPC: E21B43/16 ,  C09K8/60 ,  C09K8/94

CPC classification number: C09K8/602 ,  C09K8/94 ,  E21B43/166

Abstract: Disclosed are foam precursor compositions, foamed compositions, and methods of using these foamed compositions for the stimulation of unconventional reservoirs.

公开(公告)号：US20240052234A1

公开(公告)日：2024-02-15

申请号：US18488079

申请日：2023-10-17

Applicant: CHEVRON U.S.A. INC.

Inventor： Nabijan NIZAMIDIN ,  Gayani W. PINNAWALA ,  Guo-Qing TANG ,  Varadarajan DWARAKANATH ,  Gregory A. WINSLOW ,  Jordan Taylor ISBELL ,  Taimur MALIK

IPC: C09K8/584 ,  C09K8/588 ,  C09K8/60 ,  C09K8/66 ,  C09K8/68 ,  C09K8/80 ,  E21B43/20 ,  E21B43/26 ,  E21B47/11

CPC classification number: C09K8/584 ,  C09K8/588 ,  C09K8/602 ,  C09K8/665 ,  C09K8/68 ,  C09K8/80 ,  E21B43/20 ,  E21B43/26 ,  E21B47/11

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.

公开(公告)号：US11898094B2

公开(公告)日：2024-02-13

申请号：US17104514

申请日：2020-11-25

Applicant: Chevron U.S.A. INC.

Inventor： Nabijan Nizamidin ,  Harold C. Linnemeyer ,  Timothy P. Theriot ,  Gojko Matovic ,  Seung Han ,  Do Hoon Kim ,  Kerry K. Spilker

IPC: C09K8/62 ,  C09K8/60 ,  G01N11/04 ,  E21B43/26 ,  E21B47/00 ,  G06F30/28

CPC classification number: C09K8/62 ,  C09K8/602 ,  E21B43/26 ,  E21B47/00 ,  G01N11/04 ,  G06F30/28 ,  C09K2208/08 ,  C09K2208/28

Abstract: The present invention relates generally to systems and processes for improved drag reduction estimation and measurement and more specifically to portable drag reduction analyzers and processes for upscaling drag reduction data for a variety of field applications. A drag reduction parameter ΔB for the fluid mixture is used for determining drag reduction for a fluid mixture in an oil field or pipeline operation.