Patents Assigned to Chevron U.S.A.
  • Publication number: 20210318259
    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.
    Type: Application
    Filed: August 21, 2020
    Publication date: October 14, 2021
    Applicant: CHEVRON U.S.A. INC.
    Inventors: Martha Rebecca STOKES, Zheng YANG, Prince E. EZEBUIRO, Timothy B. FISCHER
  • Patent number: 11142715
    Abstract: Friction modifier and compositions containing the friction modifier as a fuel additive are provided. Methods for improving fuel efficiency using these compositions are also provided.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: October 12, 2021
    Assignees: CHEVRON U.S.A. INC., CHEVRON ORONITE COMPANY LLC
    Inventors: Theresa Liang Gunawan, Richard Eugene Cherpeck, Amir Gamal Maria
  • Patent number: 11137334
    Abstract: In some embodiments, a system includes a housing having a cavity defined therein for holding a test sample, a first inlet in fluid communication with the cavity to deliver fluid to the test sample, a second inlet in fluid communication with the cavity to deliver fluid to the test sample, the first inlet configured to deliver fluid to the test sample in a direction substantially perpendicular to a direction that the second inlet is configured to deliver fluid to the test sample, an outlet in fluid communication with the cavity to receive fluid from the test sample, and a force applicator configured to apply compressive force to the test sample within the cavity. The force applicator forms a seal with the housing while applying compressive force to the test sample. The system also comprises at least one sensor configured to, while fluid flows from at least one of the inlets through the test sample to the outlet, determine a fluid characteristic, a test sample characteristic, or any combination thereof.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: October 5, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Oya Aysen Karazincir, Yan Li, Karim Shafik Zaki, Wade H. Williams, Ruiting Wu, Yunhui Tan, Margaretha Catharina Maria Rijken, Russell Thomas Ewy
  • Patent number: 11135575
    Abstract: We provide a process for regenerating a spent acidic ionic liquid, comprising contacting the spent acidic ionic liquid with hydrogen and without an addition of a hydrogenation catalyst; wherein a conjunct polymer content is decreased in the spent acidic ionic liquid to produce regenerated acidic ionic liquid. We also provide a process for making an alkylate gasoline blending component, comprising: a) alkylating a mixture of isoparaffins and olefins using an acidic ionic liquid and an alkyl halide or a hydrogen halide, wherein a conjunct polymer accumulates in a spent acidic ionic liquid; and b) feeding the spent acidic ionic liquid and a hydrogen, and without an addition of a hydrogenation catalyst, to a regeneration reactor operated under selected hydrogenation conditions to produce a regenerated acidic ionic liquid that is used for the alkylating, wherein the conjunct polymer in the regenerated acidic ionic liquid is decreased by at least 50 wt %.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: October 5, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Michael John Girgis, Huping Luo, Bong Kyu Chang, Hye-Kyung Cho Timken, Steven Xugi Song, Michael Sean Driver
  • Publication number: 20210301210
    Abstract: Provided in one embodiment 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 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 pyrolysis oil and optionally pyrolysis wax comprising a naphtha/diesel fraction and heavy fraction, and char. The pyrolysis oil and wax is passed to a refinery FCC feed pretreater unit. A heavy fraction is recovered and sent to a refinery FCC unit, from which a C3 olefin/paraffin mixture fraction is recovered, which is passed to a steam cracker for ethylene production. In another embodiment, a propane fraction (C3) is recovered from a propane/propylene splitter and passed to the steam cracker.
    Type: Application
    Filed: December 23, 2020
    Publication date: September 30, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventors: Hye-Kyung Timken, Cameron McCord
  • Publication number: 20210301209
    Abstract: Provided in one embodiment 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 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 pyrolysis oil and optionally wax comprising a naphtha/diesel and heavy fraction, and char. The pyrolysis oil is passed to a refinery FCC unit from which a liquid petroleum gas C3 olefin/paraffin mixture fraction is recovered, as well as a C4 olefin/paraffin mixture fraction. The liquid petroleum gas C3 olefin/paraffin mixture fraction is passed to a steam cracker for ethylene production. The C4 olefin/paraffin mixture fraction is passed to a refinery alkylation unit, from which a n-butane and naphtha feed for a stream cracker to produce ethylene is recovered.
    Type: Application
    Filed: December 23, 2020
    Publication date: September 30, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventors: Hye-Kyung Timken, Cameron McCord
  • Patent number: 11125909
    Abstract: Embodiments of the present invention help in the processing and interpretation of seismic survey data, by correlating or otherwise comparing or associating seismic data obtained from a seismic survey with flow information obtained from a well or borehole in the surveyed area. In particular, embodiments of the present invention allow for flow data representing a flow profile along a well that is being monitored by a distributed acoustic sensor to be determined, such that regions of higher flow in the well can be determined. For example, in the production zone the well will be perforated to allow oil to enter the well, but it has not previously been possible to determine accurately where in the production zone the oil is entering the well. However, by determining a flow rate profile along the well using the DAS then this provides information as to where in the perforated production zone oil is entering the well, and hence the location of oil bearing sands.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: September 21, 2021
    Assignees: Silixa Ltd., Chevron U.S.A. Inc.
    Inventors: Mahmoud Farhadiroushan, Tom Parker, Daniel Finfer
  • Patent number: 11118431
    Abstract: A system for determining positions of a sand control service tool includes a wash pipe positioned below the sand control service tool. The system further includes a sensor attached to the wash pipe. The system also includes one or more magnets attached to downhole completion equipment. The sensor is configured to generate position indicator information that indicates whether the one or more magnets are within a threshold distance from the sensor. A crossover port of the sand control service tool is positioned above a sand control packer when the one or more magnets are within the threshold distance from the sensor.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: September 14, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Quentin Bee Hing Lau, Cole Thomas Brinkley
  • Patent number: 11119088
    Abstract: A method for calculating the research octane number and the motor octane number for a liquid blended fuel. Data related to the aromatic, olefin, normal paraffin, iso-paraffin, and naphthalene properties of each of a plurality of liquid fuel blending components are acquired and transformed to obtain a transformed component property for each of the components. A reverse property transformation is performed for each of the plurality of liquid blending components. The research octane number and the motor octane number are calculated based on the performed reverse property transformation and determined percentages of each of the plurality of liquid blending components.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: September 14, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventor: Himal Pravin Munsif
  • Patent number: 11118426
    Abstract: Disclosed is a VIT apparatus for mitigating APB in a wellbore casing annulus of a HPHT deepwater well. The apparatus includes inner and outer tubes formed of 15Cr-135 martensitic stainless steel having a vacuum space therebetween and a weld formed of high yield strength alloy for joining the inner and outer tubes. A protective weld overlay formed of corrosion resistant alloy is placed over the weld. The weld and the weld overlay are formed so as not to extend into the inner bore. Also disclosed are a process for forming the apparatus, and a system and method for using the apparatus. Multiple apparatus are connected by threaded couplings to form an elongated device that can be placed within a casing within a wellbore to carry fluids from the deepwater well to a surface location. When exposed to HPHT well conditions, the vacuum in the VIT apparatus is not lost.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: September 14, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Robert Eugene Hargrave, Jonathan Scarborough Lee
  • Patent number: 11105943
    Abstract: A method is described for identifying source rocks in a subsurface volume of interest. The method may include generating a trend-normalized reflectivity seismic attribute and calculating the location, thickness, organic richness and thermal maturity of the potential source rocks based on seismic data. The method may be executed by a computer system.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: August 31, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Mingya Chen, Fang Lin, Christopher H. Skelt
  • Patent number: 11105944
    Abstract: A method is described for estimating hydrocarbon reservoir attributes including obtaining a geophysical dataset and a geological dataset; obtaining a parameter model, the parameter model having been conditioned by training an initial parameter model using training data, wherein the geological data includes well data and the training data includes the well data; picking a surface in the geophysical dataset; assigning stratigraphic meaning to the at least one surface based on the geological dataset; identifying at least one region of interest on the at least one surface; generating statistical seismic attributes for the at least one region; identifying critical attributes among the statistical seismic attributes by applying the parameter model to generate response variable maps for the at least one region; and generating uncertainty maps for each of the critical attributes and for the response variables. The method may be executed by a computer system.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: August 31, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Ellen Xiaoxia Xu, Yuanbo Lin, Ke Wang, Todd C. Dygert, Morgan David Sullivan, James P. Disiena
  • Patent number: 11097968
    Abstract: A method for inhibiting the formation, deposition and adherence of scale to metallic and other surfaces in the equipment, vessels and/or piping of facilities for the handling of oil and gas produced fluid is disclosed. An effective scale inhibiting amount of alginate is added to a produced fluid containing a scale-forming divalent cation. The alginate effectively cross-links with a scale-forming divalent cation, e.g., calcium, forming an alginate gel for subsequent separation and removal from the produced fluid.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: August 24, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Mark Charlesworth, Christopher John Kalli, David Glynn Thomas, Wei Shi, Brendan Francis Graham, Zachary Mark Aman, Eric Freemantle May
  • Patent number: 11091974
    Abstract: The present disclosure provides adjustable mandrel hanger assemblies and methods of their use. The adjustable mandrel hanger assembly includes an upper wellhead component, a lower wellhead component comprising a load shoulder, a mandrel hanger with a protrusion disposed on an exterior of the mandrel hanger, a seal assembly, and a height adjustment ring, wherein the height adjustment ring fits securely around a protrusion of the mandrel hanger and wherein a largest exterior diameter of the height adjustment ring is greater than an interior diameter of the load shoulder.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: August 17, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Vicki Deck Corso, John Lloyd Busby
  • Patent number: 11091683
    Abstract: The disclosure relates to an electrocrushing drilling fluid with an electrocrushing drilling base fluid including a polar oil, a non-polar oil, or a combination thereof and glycerine carbonate. The electrocrushing drilling fluid or base fluid may further include water or glycerin. The electrocrushing drilling fluid may further contain at least one additive. The electrocrushing drilling fluid may have a dielectric constant or dielectric strength of at least a set amount, an electric conductivity less than a set amount, or a combination of these properties. The disclosure further relates to an electrocrushing drilling system containing the electrocrushing drilling fluid and an electrocrushing drill bit.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: August 17, 2021
    Assignees: Halliburton Energy Services, Inc., Chevron U.S.A. Inc.
    Inventors: Cato Russell McDaniel, William Walter Shumway, Donald Curtis Van Slyke
  • Patent number: 11091685
    Abstract: The disclosure relates to an electrocrushing drilling fluid with an electrocrushing drilling base fluid including a non-polar oil, —OH, —(OH)2, or —(OH)3 alcohol, water, and an emulsifier in proportional amounts by weight or volume in that order. The electrocrushing drilling fluid may further contain at least one additive. The electrocrushing drilling fluid may have a dielectric constant or dielectric strength of at least a set amount, an electric conductivity or viscosity less than a set amount, or a combination of these properties. The disclosure further relates to an electrocrushing drilling system containing the electrocrushing drilling fluid and an electrocrushing drill bit and a method of electrocrushing drilling.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: August 17, 2021
    Assignees: HALLIBURTON ENERGY SERVICES, INC., CHEVRON U.S.A. INC.
    Inventors: Donald Curtis Van Slyke, Dale E. Jamison, William Walter Shumway
  • Patent number: 11091961
    Abstract: A system for developing multiple subterranean wellbores in a land-based field can include a first operational platform disposed over a first entry point of a first subterranean wellbore at a first time. The system can also include a second operational platform disposed over a second entry point of a second subterranean wellbore at the first time, where the first entry point and the second entry point are located proximate to each other. The system can further include first field equipment disposed on the first operational platform. The system can also include a second field equipment disposed on the second operational platform. The first field equipment can be used to develop the first subterranean wellbore, and the second field equipment can be used to develop the second subterranean wellbore.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: August 17, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Matthew Scott Bolen, Kenneth Eric Hodges, Steven Thomas Bowman
  • Patent number: 11084973
    Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 ?m filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: August 10, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Do Hoon Kim, Dennis Arun Alexis, Varadarajan Dwarakanath, David Espinosa, Taimur Malik, Logan Jackson, Tom Lynch, Ronald Robinson, Frances Fournier, Hong Yang, Sukhjit Aujla
  • Patent number: 11085259
    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 AB for the fluid mixture is used for determining drag reduction for a fluid mixture in an oil field or pipeline operation.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: August 10, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Nabijan Nizamidin, Harold Linnemeyer
  • Patent number: 11086492
    Abstract: A graphical user interface may provide visualization of comparison between planned value(s) and usage value(s) of a set of operating parameters for a tool. The graphical user interface may include a planned usage region and a usage region. The planned usage region may provide visualization of the planned value(s) for the tool. The usage region may provide visualization of the usage value(s) for the tool. The usage region may include a compliance section. The compliance section may provide visualization of whether the usage value(s) complies with the corresponding planned value(s) such that the compliance section includes different visual features based on whether the usage value(s) complies or does not comply with the corresponding planned value(s). The usage region may provide comments and/or recommendations based on the learnings from analysis of offset wells.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: August 10, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Devanand Ramchune, Graham Mensa-Wilmot