公开(公告)号：US11976916B2

公开(公告)日：2024-05-07

申请号：US17363512

申请日：2021-06-30

Applicant: Chevron U.S.A. Inc.

Inventor： Baha Tanju ,  Hariprasad Janakiram Subramani ,  Peter Crowder ,  Lee Rhyne ,  Nikolaos Ioannis Salmatanis ,  Pedro Vargas ,  Milind L. Prabhu

IPC: G01B11/16

CPC classification number: G01B11/165

Abstract: 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.

公开(公告)号：US11964875B2

公开(公告)日：2024-04-23

申请号：US17703067

申请日：2022-03-24

Applicant: CHEVRON U.S.A. INC.

Inventor： Dan Xie ,  Kurt Owen Jensen ,  Adeola Florence Ojo

IPC: B01J29/70 ,  C01B39/48

CPC classification number: C01B39/48 ,  B01J29/703 ,  C01P2002/72

Abstract: A method is provided for synthesizing *MRE molecular sieves using an organic structure directing agent which comprises a 1-ethylpyridinium cation.

公开(公告)号：US20240123433A1

公开(公告)日：2024-04-18

申请号：US18270208

申请日：2021-12-29

Applicant: CHEVRON U.S.A. INC.

Inventor： Cong-Yan CHEN ,  Theodorus Ludovicus Michael MAESEN ,  Tracy Margaret DAVIS ,  Dan XIE

IPC: B01J29/068 ,  B01J35/64 ,  C10G47/18

CPC classification number: B01J29/068 ,  B01J35/643 ,  C10G47/18 ,  B01J2229/20 ,  B01J2229/42 ,  C10G2300/1033

Abstract: 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.

公开(公告)号：US11959025B2

公开(公告)日：2024-04-16

申请号：US18051002

申请日：2022-10-30

Applicant: Chevron U.S.A. Inc.

Inventor： Hye-Kyung Timken

IPC: C10G1/10 ,  C07C4/06 ,  C08F10/06 ,  C10B53/07 ,  C10G1/00 ,  C10G11/18 ,  C10G45/58 ,  C10M109/02 ,  C10M177/00 ,  C10N70/00

CPC classification number: C10G1/10 ,  C07C4/06 ,  C08F10/06 ,  C10B53/07 ,  C10G1/002 ,  C10G11/18 ,  C10G45/58 ,  C10M109/02 ,  C10M177/00 ,  C10G2300/1003 ,  C10G2300/202 ,  C10G2300/205 ,  C10G2300/304 ,  C10G2300/305 ,  C10G2300/308 ,  C10G2300/4006 ,  C10G2300/4012 ,  C10G2300/4018 ,  C10G2400/02 ,  C10G2400/04 ,  C10G2400/08 ,  C10G2400/10 ,  C10G2400/26 ,  C10M2203/003 ,  C10N2070/00

Abstract: 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. The C3 paraffin fraction is optionally passed to a dehydrogenation unit to produce additional propylene and then the resulting C3 olefin is passed to a propylene polymerization reactor. The heavy fraction of pyrolyzed oil is passed to an isomerization dewaxing unit to produce a lubricating base oil.

公开(公告)号：US20240110463A1

公开(公告)日：2024-04-04

申请号：US18473235

申请日：2023-09-23

Applicant: Chevron U.S.A. Inc.

Inventor： Wangming Lu ,  Khiem Nguyen ,  Jay Patrick Painter ,  Caleb Kimbrell Carroll ,  William Stephen Averill ,  Deryck Edward Matthew Williams ,  David Crenshaw Barrow ,  Michael Ryan Fitzsimmons

IPC: E21B41/00 ,  E21B33/035

CPC classification number: E21B41/0007 ,  E21B33/035

Abstract: A wellhead bracing system for a subsea well includes a base plate assembly and a wellhead brace assembly. The base plate assembly comprises a top surface, a bottom surface, a base plate aperture, and a plurality of anchor holes. The wellhead brace assembly comprises a vertical plate assembly having a cylindrical shape, a horizontal plate assembly to which the vertical plate assembly is attached, and a vertical support assembly attached to an outer surface of the vertical plate assembly and attached to the top surface of the horizontal plate assembly. Horizontal plate holes of the horizontal plate assembly are configured to attach to studs on the top surface of the base plate to secure the wellhead brace assembly to the base plate assembly. The wellhead bracing system slides onto a wellhead of the subsea well and braces an exterior of the wellhead.

公开(公告)号：US20240110120A1

公开(公告)日：2024-04-04

申请号：US18262171

申请日：2022-01-18

Applicant: CHEVRON U.S.A. INC.

Inventor： Yihua ZHANG ,  Guan-Dao LEI ,  Malek M. ROSTAMI ,  Beth A. RUSSELL

IPC: C10M133/44 ,  C10M169/04

CPC classification number: C10M133/44 ,  C10M169/04 ,  C10N2030/20

Abstract: 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.

公开(公告)号：US20240091750A1

公开(公告)日：2024-03-21

申请号：US18458226

申请日：2023-08-30

Applicant: Chevron U.S.A. Inc.

Inventor： Stacey I. ZONES ,  Cong-Yan CHEN

IPC: B01J29/70 ,  B01J29/74 ,  B01J37/00 ,  B01J37/03 ,  B01J37/04 ,  B01J37/08 ,  C01B39/04 ,  C01B39/12 ,  C10G35/095

CPC classification number: B01J29/7049 ,  B01J29/74 ,  B01J37/0018 ,  B01J37/031 ,  B01J37/04 ,  B01J37/08 ,  C01B39/04 ,  C01B39/12 ,  C10G35/095 ,  B01J2229/183 ,  C01P2002/72 ,  C10G2300/1044

Abstract: 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.

公开(公告)号：US11932547B2

公开(公告)日：2024-03-19

申请号：US17691563

申请日：2022-03-10

Applicant: CHEVRON U.S.A. INC.

Inventor： Dan Xie

IPC: C01B39/46

CPC classification number: C01B39/46 ,  C01P2002/72 ,  C01P2004/03

Abstract: 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.

公开(公告)号：US11921256B2

公开(公告)日：2024-03-05

申请号：US17219663

申请日：2021-03-31

Applicant: CHEVRON U.S.A. INC.

Inventor： Larry A. Bowden, Jr. ,  Lokendra Jain ,  Irina V. Prestwood

IPC: G01V99/00 ,  G06F17/13 ,  G06F30/27 ,  G06F30/28 ,  G06N3/02 ,  G06F111/04 ,  G06F113/08

CPC classification number: G01V99/005 ,  G06F17/13 ,  G06F30/27 ,  G06F30/28 ,  G06N3/02 ,  G06F2111/04 ,  G06F2113/08

Abstract: Differential equations defining physics of a reservoir are modeled as a neural network. Measured data for the reservoir is used as boundary condition to calculate the different equation parameters. The result is a neural ordinary differential equation network that models reservoir characteristics (e.g., inter-well connectivities, response times for injection wells and production wells) using physics that are encoded into the network. The neural ordinary differential equation network provides a solution for the reservoir that is constrained by the physics of the reservoir.

公开(公告)号：US11912947B1

公开(公告)日：2024-02-27

申请号：US18207356

申请日：2023-06-08

Applicant: Chevron U.S.A. Inc.

Inventor： Sven Ivar Hommeltoft

IPC: C10L1/02 ,  B01J38/30 ,  B01J8/18 ,  B01J8/26 ,  B01J8/22

CPC classification number: C10L1/02 ,  B01J8/1827 ,  B01J8/228 ,  B01J8/26 ,  B01J38/30 ,  B01J2208/00769 ,  C10L2230/04 ,  C10L2290/12

Abstract: A process involves (a) processing a lipid feedstock over a fluidized particulate catalyst in a gas-based stream in a fluid bed reactor to obtain a processed stream and spent catalyst comprising coke deposits, (b) continuously introducing the spent catalyst comprising the coke deposits to a catalyst regeneration unit, (c) continuously operating the catalyst regeneration unit to burn off the coke deposits from the spent catalyst to obtain a regenerated particulate catalyst, and (d) continuously introducing the regenerated particulate catalyst from the catalyst regeneration unit to the fluid bed reactor.