Patents Assigned to Chevron U.S.A. Inc.
  • Patent number: 11079508
    Abstract: A method is described for seismic modeling implemented on a computer system including multiple computer nodes, which includes receiving, at a computer processor, a 4D speed of sound in water library and a marine seismic survey geometry; creating, via the computer processor, a full survey 3D Earth model for each seismic shot time based on the 4D speed of sound in water library to generate a set of dynamic 3D Earth models; simulating 4D seismic shots for the set of dynamic 3D Earth models by simulating multiple shots on each node to generate a set of 4D seismic shot gathers; and outputting the 4D seismic shot gathers.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: August 3, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Lei Zhuo, Thor Johnsen, Kevin John Davies
  • Patent number: 11079505
    Abstract: Apparatus (10) and methods for combining time reversal and elastic nonlinearity of formation materials for qualtitatively probing for over-pressured regions down hole in advance of a well drilling bit, to determine the distance to the over-pressured region, and for accurately measuring pore pressure downhole in a formation, are described. Classical and reciprocal time reversal methods may be utilized to achieve these measurements.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: August 3, 2021
    Assignees: TRIAD NATIONAL SECURITY, LLC, CHEVRON U.S.A. INC.
    Inventors: Paul A. Johnson, Timothy J. Ulrich, II, Pierre-Yves Le Bas, Robert A. Guyer, Harvey E. Goodman, Marcel C. Remillieux
  • Patent number: 11078760
    Abstract: Pullout information for a drilling tool may be obtained. The pullout information may characterize one or more operating characteristics of the drilling tool during pullout of the drilling tool from the wellbore. A pullout friction factor for the wellbore may be determined based on the pullout information. A comparison of the pullout friction factor to a pullout friction factor threshold may be performed to determine whether the pullout friction factor satisfies or violates the pullout friction factor threshold. The condition of the wellbore to run the casing into the wellbore may be determined based on whether the pullout friction factor satisfies or violates the pullout friction factor threshold.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: August 3, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Namig Khochbar, Raafat Z. Abbas, Emre Doruk Tanyel, Johan C. Delgado
  • Patent number: 11078727
    Abstract: A disclosed pulsed-power drilling system may include a controller that receives and analyzes feedback from downhole components reflecting changing conditions or performance measurements associated with a pulsed drilling operation to determine that an operating parameter of the drilling operation should be modified. The controller may output a control signal to cause an adjustment of a configurable downhole component, such as mechanical, electrical, or hydraulic component that affects the operating parameter, while the drill bit remains in the wellbore. The controller may adjust a segmented transformer of a pulse-generating circuit, changing the number of primary winding switches that are fired, or the timing of the firing of the switches, to modify characteristics of the generated pulses. Adjusting a downhole component may affect the drilling rate, the drilling direction, the flow of drilling fluid, a pulse rise time, a pulse repetition rate, or a rate of penetration for the drilling operation.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: August 3, 2021
    Assignees: Halliburton Energy Services, Inc., Chevron U.S.A. Inc., SDG LLC
    Inventors: Daniel D. Gleitman, William M. Moeny
  • Publication number: 20210230976
    Abstract: Disclosed are systems and methods for thermal management of subsea jumpers that provide the ability to cool and/or retain heat in production fluids within the jumpers. The jumpers are provided with an annular pipe section surrounding the jumper circumferentially. The flow of a liquid cooling medium into an inlet and out an outlet of the annular pipe section can be controlled to provide cooling or heat retention as needed. A control system can be used to generate an alarm based on fluid temperature and/or fluid flow rate within the jumper indicating the need to adjust the flow of the cooling medium to manage the temperature of fluids within the jumper. Changes may be needed particularly depending on the phase of production, e.g., early life, normal operation, shut down and late life operation.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 29, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventors: Antonio C.F. CRITSINELIS, Sid MEBARKIA, Michelle A. WISE, Yesudas J. MANIMALA, William C. HUGHES, Steven W. COCHRAN, Edgar URIBE, Jason D. GARCIA
  • Publication number: 20210231250
    Abstract: Disclosed are systems and methods for thermal management of subsea conduits. A jumper that carries oil and/or gas produced from a subsea well in a subsea production facility located on a seabed has a first end for connecting to a first subsea component and a second end for connecting to a second subsea component. The jumper includes a jumper segment that is sloped relative to the horizontal, such that gravity assists with drainage of fluid from the second end of the jumper independent from fluid pressure in the jumper. At least a portion of the jumper is uninsulated to allow exchange of heat with seawater surrounding the jumper as produced fluid travels through the jumper. The amount of insulation on the jumper can be varied such that heat transfer from the production fluids to seawater surrounding the jumper circuit is adjusted as desired.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 29, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventors: Antonio C.F. Critsinelis, Sid MEBARKIA, Michelle A. WISE, Yesudas J. MANIMALA, William C. HUGHES, Steven W. COCHRAN, Edgar URIBE, Jason D. GARCIA
  • Publication number: 20210230975
    Abstract: Disclosed are systems and methods for thermal management of subsea conduits such as jumpers that provide the ability to alternate between cooling and heat retention of production fluids within the conduit as needed depending on the phase of operation. Adjustable insulation elements are provided on the conduits so that convective heat transfer between surrounding seawater and the conduit can be allowed or reduced. A control system can activate an alarm indicating the need to adjust the insulation depending on the temperature and/or flow rate of fluids in the conduit. Conventional conduits can be retrofitted by adding adjustable insulation elements to enable thermal management.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 29, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventors: Antonio C.F. CRITSINELIS, Sid MEBARKIA, Michelle A. WISE, Yesudas J. MANIMALA, William C. HUGHES, Steven W. COCHRAN, Edgar URIBE, Jason D. GARCIA
  • Publication number: 20210231249
    Abstract: Disclosed are systems and methods for thermal management of subsea interconnecting conduit such as jumpers that provide cooling and heat retention of production fluids within the jumpers. In a jumper circuit, parallel sections of jumper are provided having differing amounts of heat transfer between surrounding seawater and production fluids flowing within. Valving is provided to control fluid flow between the parallel sections of jumper, thus controlling the amount of heat transfer between the surrounding seawater and the jumper circuit. A control system can be used to generate an alarm based on fluid temperature and/or fluid flow rate within the jumper circuit indicating the need to adjust the valving to manage the temperature of fluids within the jumper circuit. Changes may be needed particularly depending on the phase of production, e.g., early life, normal operation, shut down and late life operation.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 29, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventors: Antonio C.F. CRITSINELIS, Sid MEBARKIA, Michelle A. WISE, Yesudas J. MANIMALA, William C. HUGHES, Steven W. COCHRAN, Edgar URIBE, Jason D. GARCIA
  • Publication number: 20210232868
    Abstract: Embodiments of categorizing fractures in a subsurface formation are provided herein. One embodiment comprises obtaining at least one borehole image for a plurality of fractures in a subsurface formation and at least one resistivity log for the plurality of fractures of the surface formation. The embodiment comprises determining first aperture data based on the at least one borehole image for the plurality of fractures and determining second aperture data based on the at the least one resistivity log for the plurality of fractures. The embodiment comprises comparing the first aperture data based on the at least one borehole image and the second aperture data based on at least one resistivity log to determine whether to categorize each fracture of the plurality of fractures as a naturally occurring fracture or a non-naturally occurring fracture. The embodiment comprises generating an output indicating the categorization of each fracture and displaying the output.
    Type: Application
    Filed: January 29, 2020
    Publication date: July 29, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventors: Bo GONG, Hanming WANG
  • Patent number: 11071957
    Abstract: An improved nozzle device for a down-flow hydroprocessing reactor is disclosed. The down-flow nozzle is useful in the petroleum and chemical processing industries in catalytic reactions of hydrocarbon feedstocks in the presence of hydrogen, at an elevated temperature and pressure, to provide for the mixing and distribution of gas and liquid to reactor catalyst beds. Typical hydroprocessing applications include hydrotreating, hydrofinishing, hydrocracking and hydrodewaxing.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: July 27, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Steven Xuqi Song, Timothy D. Breig
  • Publication number: 20210222516
    Abstract: A subterranean coring assembly can include a body having at least one wall that forms a cavity, wherein the cavity has a top end and a bottom end. The subterranean coring assembly can also include a first flow regulating device movably disposed within the cavity, where the first flow regulating device is configured to move from a first default position to a first position within the cavity based on first flow characteristics of fluid that flows into the top end of the cavity toward the bottom end of the cavity.
    Type: Application
    Filed: November 27, 2018
    Publication date: July 22, 2021
    Applicant: CHEVRON U.S.A. INC.
    Inventors: James Daniel Montoya, Byron Kurt Deshotels
  • Patent number: 11067711
    Abstract: Apparatus (10) and methods for measurement of pore pressure in rock formations through a metal borehole casing (32) after a well is cased and cemented, are described. Such measurements may be accomplished by using the Dynamic Acoustic Elasticity (DAE) method for characterizing nonlinear parameters by perturbing a selected rock formation region with a High Amplitude, Low Frequency (HALF) acoustic strain wave, and probing this region using a Low Amplitude, High Frequency (LAHF) acoustic wave (18), (22). Time reversal techniques (36) may be employed for focusing acoustic energy into the formation in the vicinity of the pipe or open hole. The change in wave speed of the probe pulses as the HALF induced strain wave oscillation propagates through the formation, as a function of the induced strain, may be used to determine the nonlinear elastic parameters ?, ?, ?, and A of the pore pressure, from which the pore pressure may be determined in the region of the HALF wave.
    Type: Grant
    Filed: March 26, 2017
    Date of Patent: July 20, 2021
    Assignees: TRIAD NATIONAL SECURITY, LLC, CHEVRON U.S.A. INC.
    Inventors: Harvey E. Goodman, Timothy James Ulrich, II, Robert A. Guyer, Paul A. Johnson, Marcel C. Remillieux, Pierre-Yves Le Bas
  • Publication number: 20210215651
    Abstract: Embodiments of estimating unknown proportions of a plurality of end-members in an unknown mixture are provided herein. One embodiment of a method of estimating unknown proportions of a plurality of end-members in an unknown mixture comprises receiving fingerprint data of a plurality of end-members and an unknown mixture comprising unknown proportions of the plurality of end-members; processing the fingerprint data of the plurality of end-members and the unknown mixture to generate peak height data of the plurality of end-members and the unknown mixture; and generating an estimate of the unknown proportions of the plurality of end-members in the unknown mixture by applying a Markov Chain Monte Carlo method to the peak height data of the plurality of end-members and the unknown mixture.
    Type: Application
    Filed: January 15, 2021
    Publication date: July 15, 2021
    Applicant: CHEVRON U.S.A. INC.
    Inventor: Lingbo XING
  • Patent number: 11060390
    Abstract: Downhole casing temperature may be predicated at the drill string/casing interface as a function of side force on the casing due to drill string tension, the speed or rate of penetration of the drill string in the axial direction, the rate of rotation of the drill string, and a calibrated/assumed friction factor. Predicted down hole casing temperature may be used as a proxy to monitor casing integrity.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: July 13, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Michael Ryan Fitzsimmons, Rollyn Rousel Samson Reyes
  • Publication number: 20210197930
    Abstract: Embodiments of an underwater monitoring system are provided. In one embodiment, the system has an anchor stake connected to a vented pipe. The pipe has an interior and an exterior and is configured to house a sensor in the interior. The vents on the vented pipe are configured to exchange water between the interior and the exterior while protecting any interior sensors.
    Type: Application
    Filed: October 31, 2019
    Publication date: July 1, 2021
    Applicant: CHEVRON U.S.A. INC.
    Inventor: Miles Ashley Frazer
  • Patent number: 11047213
    Abstract: Described herein are various embodiments of computer-implemented methods, computing systems, and program products for analyzing a flood operation on a hydrocarbon reservoir. For example, an embodiment of a computer implemented method of analyzing at least a first flood operation and a second flood operation. The embodiment includes, for each flood operation: receiving production data and injection data, running capacitance resistance modeling, using the generated response times, the generated interwell connectivities, the received production data, the received injection data, or any combination thereof to generate a proxy of pore volume swept per well pair, and aggregating the generated proxies to generate an estimate of pore volume swept at a well level, at a reservoir level, or both for the flood operation. The embodiment also includes comparing the generated estimate of pore volume swept to determine a change in sweep efficiency at the well level, at the reservoir level, or both.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: June 29, 2021
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Morteza Sayarpour, Nariman Fathi Najafabadi, Lokendra Jain
  • Patent number: 11047999
    Abstract: A method is described for seismic imaging that will produce a seismic image with correctly focused and positioned reflectors. This is accomplished by adding physical geological information to a beam tomography process to generate an updated earth model for the seismic imaging. The method may be executed by a computer system.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: June 29, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventors: Huafeng Liu, Norman Ross Hill, Daniel Johnson, Konstantin Osypov
  • Publication number: 20210189250
    Abstract: Provided is a continuous process for converting waste plastic into recycle for polyethylene polymerization or for normal alpha olefins. The process comprises selecting waste plastics containing polyethylene and/or 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 crude unit in a refinery from which is recovered a straight run naphtha fraction (C5-C8) or a propane/butane (C3-C4) fraction. The straight run naphtha fraction, or propane and butane (C3-C4) fraction, is passed to a steam cracker for ethylene production. The ethylene is converted to normal alpha olefin and/or polyethylene. Also, a heavy fraction from the pyrolysis reactor can be combined with a heavy fraction of normal alpha olefin stream recovered from the steam cracker.
    Type: Application
    Filed: December 23, 2020
    Publication date: June 24, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventor: Hye-Kyung Timken
  • Publication number: 20210189254
    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.
    Type: Application
    Filed: December 23, 2020
    Publication date: June 24, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventor: Hye-Kyung Timken
  • Publication number: 20210189253
    Abstract: Provided is a continuous process for converting waste plastic into recycle for polypropylene 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 naphtha/diesel fraction, a heavy fraction, and char. Pyrolysis oil and wax, comprising naphtha/diesel and heavy fractions, is passed to a refinery FCC unit. A liquid petroleum gas C3 olefin/paraffin mixture is recovered from the FCC unit. The C3 paraffins and C3 olefins are separated into different fractions with the C3 olefin fraction passed to a propylene polymerization reactor, and the C3 paraffin fraction passed optionally to a dehydrogenation unit to produce additional propylene.
    Type: Application
    Filed: December 23, 2020
    Publication date: June 24, 2021
    Applicant: Chevron U.S.A. Inc.
    Inventor: Hye-Kyung Timken