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    Valve extension tool
    113.
    发明授权
    Valve extension tool 有权

    公开(公告)号：US11577368B2

    公开(公告)日：2023-02-14

    申请号：US17110736

    申请日：2020-12-03

    Applicant: Chevron U.S.A. Inc.

    Inventor： Albert E. Butterfield, IV

    IPC: B25B9/02 ,  F16K31/60

    Abstract: A valve extension tool is configured to operate a hand wheel of a valve. The valve extension tool includes a handle configured for operation by a first operator and a pipe assembly connected to the handle. The pipe assembly includes a proximal pipe segment connected to the handle, a crank connected to the proximal pipe segment and configured for operation by a second operator, and a distal pipe segment connected to the crank. In addition, the valve extension tool includes a front pipe segment connected to the distal pipe segment of the pipe assembly. Further, the valve extension tool includes a joint connected to the front pipe segment, wherein the joint is configured to engage a hand wheel of a valve.

    HIGH VOLTAGE SUBMARINE CABLE SYSTEMS
    114.
    发明申请
    HIGH VOLTAGE SUBMARINE CABLE SYSTEMS 有权

    公开(公告)号：US20230029368A1

    公开(公告)日：2023-01-26

    申请号：US17382644

    申请日：2021-07-22

    Applicant: CHEVRON U.S.A. INC.

    Inventor： Gerald Keith SPERLING ,  Masoud HAJIAGHAJANI

    IPC: H02B1/20 ,  H02J13/00 ,  H02G9/12

    Abstract: A system for transmission of power offshore comprises two or more power stations operably connected with a high voltage cable system. The high voltage cable system may comprise a dynamic, dry type high voltage submarine cable of varying length configured to transmit at least about 45 megawatts of power. In some cases the dynamic, dry type high voltage submarine cable comprises a first end connected to an offshore power station and second end connected to a static submarine cable system which is connected to an onshore power station. The systems may facilitate transmission of power for applications such as compressing and/or pumping subsea natural gas in deep water.

    Base oil hydrotreating catalyst and process of use
    115.
    发明授权
    Base oil hydrotreating catalyst and process of use 有权

    公开(公告)号：US11559789B2

    公开(公告)日：2023-01-24

    申请号：US17199282

    申请日：2021-03-11

    Applicant: CHEVRON U.S.A. INC.

    Inventor： Yihua Zhang ,  Guan-Dao Lei ,  Bi-Zeng Zhan

    IPC: B01J23/44 ,  B01J21/12 ,  C10G45/62 ,  C10M101/02 ,  C10M177/00 ,  B01J35/10 ,  C10N70/00

    Abstract: 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 a second amorphous silica alumina. The catalyst and process generally involve the use of a base extrudate comprising the high nanopore volume ASA and the second ASA in a catalyst to produce hydrotreated dewaxed base oil products by contacting the catalyst with a hydrocarbon feedstock. The catalyst base extrudate advantageously comprises a first amorphous silica alumina having a pore volume in the 11-20 nm pore diameter range of 0.2 to 1.0 cc/g and a second amorphous silica alumina having a pore volume in the 11-20 nm pore diameter range of 0.02 to 0.2 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.

    Determining a cation exchange capacity of a rock sample
    118.
    发明授权
    Determining a cation exchange capacity of a rock sample 有权

    公开(公告)号：US11549902B2

    公开(公告)日：2023-01-10

    申请号：US16999242

    申请日：2020-08-21

    Applicant: CHEVRON U.S.A. INC.

    Inventor： Martha Rebecca Stokes ,  Zheng Yang ,  Prince E. Ezebuiro ,  Timothy B. Fischer

    IPC: G01N27/22 ,  G01N33/24 ,  E21B49/00 ,  E21B49/02

    Abstract: Provided herein are various embodiments of determining a cation exchange capacity of a rock sample. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises equilibrating the rock sample to a relative humidity, performing a dielectric permittivity measurement on the rock sample at the relative humidity, and determining a cation exchange capacity of the rock sample based on the dielectric permittivity measurement. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises receiving a dielectric permittivity measurement on the rock sample, and determining a cation exchange capacity for the rock sample based on the dielectric permittivity measurement of the rock sample and a relationship between cation exchange capacity and dielectric permittivity measurements for mineral mixtures corresponding to a range of cation exchange capacity values.

    OPTICAL SURFACE STRAIN MEASUREMENTS FOR PIPE INTEGRITY MONITORING
    119.
    发明申请
    OPTICAL SURFACE STRAIN MEASUREMENTS FOR PIPE INTEGRITY MONITORING 有权

    公开(公告)号：US20230003511A1

    公开(公告)日：2023-01-05

    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 ,  Nikos Salmatanis ,  Pedro Vargas ,  Milind L. Prabhu

    IPC: G01B11/16

    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.

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