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公开(公告)号：US20220333003A1
公开(公告)日：2022-10-20
申请号：US17853283
申请日：2022-06-29
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
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.
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公开(公告)号：US11834609B2
公开(公告)日：2023-12-05
申请号：US16635906
申请日：2018-07-31
Applicant: CHEVRON U.S.A. INC.
Inventor： Dustin L. Walker , Gayani W. Pinnawala , Nabijan Nizamidin , Varadarajan Dwarakanath , Guo-Qing Tang , Dustin J. Lowry , Tetsuo Art Inouye , Taimur Malik
CPC classification number: C09K8/604 , C09K8/602 , C09K8/68 , C09K8/74 , C09K8/80 , C09K8/86 , E21B43/267 , E21B43/27 , E21B47/11 , C09K2208/10 , C09K2208/12 , C09K2208/26 , C09K2208/28 , C09K2208/32
Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a surfactant and optionally one or more secondary surfactants. Also provided are methods of using the stabilized injection fluids in stimulation operations.
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公开(公告)号：US11787998B2
公开(公告)日：2023-10-17
申请号：US17853283
申请日：2022-06-29
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.
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公开(公告)号：US12215276B2
公开(公告)日：2025-02-04
申请号：US18160710
申请日：2023-01-27
Applicant: CHEVRON U.S.A. INC.
Inventor： Sujeewa S. Palayangoda , Kerry Kennedy Spilker , Sumitra Subrahmanyan , Gayani W. Pinnawala , Sophany Thach , Gregory A. Winslow , Dennis Arun Alexis , Harold Charles Linnemeyer , Timothy P. Theriot , Les Leszek Jackowski , Francesca Cibotti
Abstract: Described herein are methods of treating fluid including hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation. The methods include adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The viscosity reducer is buffered at a pH of 7 or less. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid.
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公开(公告)号：US11898100B2
公开(公告)日：2024-02-13
申请号：US17121333
申请日：2020-12-14
Applicant: Chevron U.S.A. Inc.
Inventor： Gayani W. Pinnawala , Sujeewa S. Palayangoda , Varadarajan Dwarakanath , Mohamad Salman , Mohsen S. Tagavifar
CPC classification number: C09K8/86 , C10G33/04 , C09K2208/26
Abstract: Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20230383636A1
公开(公告)日：2023-11-30
申请号：US18326409
申请日：2023-05-31
Applicant: CHEVRON U.S.A. INC.
Inventor： Gojko Matovic , Nabijan Nizamidin , Michael Ogechukwuka Unomah , Do Hoon Kim , Varadarajan Dwarakanath , Taimur Malik , Gayani W. Pinnawala , Dennis A. Alexis , Samuel Wei-en Lau
IPC: E21B43/267 , C09K8/588 , C09K8/584
CPC classification number: E21B43/267 , C09K8/588 , C09K8/584 , C09K2208/28
Abstract: Described are compositions and methods for use in oil and gas operations. The methods can decrease pressure drop along a lateral segment of a wellbore in an unconventional subterranean formation.
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7.发明授权公开(公告)号：US11760921B2
公开(公告)日：2023-09-19
申请号：US16635904
申请日：2018-07-31
Applicant: CHEVRON U.S.A. INC.
Inventor： Dustin L. Walker , Gayani W. Pinnawala , Nabijan Nizamidin , Varadarajan Dwarakanath , Guo-Qing Tang , Dustin J. Lowry , Tetsuo Art Inouye , Taimur Malik
CPC classification number: C09K8/604 , C09K8/602 , C09K8/68 , C09K8/74 , C09K8/80 , C09K8/86 , E21B43/267 , E21B43/27 , E21B47/11 , C09K2208/10 , C09K2208/12 , C09K2208/26 , C09K2208/28 , C09K2208/32
Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a non-ionic surfactant and optionally one or more secondary surfactants.
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公开(公告)号：US12286588B2
公开(公告)日：2025-04-29
申请号：US17920974
申请日：2021-04-26
Applicant: CHEVRON U.S.A. INC.
Inventor： Gayani W. Pinnawala , Sujeewa S. Palayangoda , Gregory A. Winslow , Varadarajan Dwarakanath
Abstract: The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making polyanionic surfactants are also described.
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公开(公告)号：US12012549B2
公开(公告)日：2024-06-18
申请号：US17770559
申请日：2020-10-30
Applicant: CHEVRON ORONITE COMPANY LLC , CHEVRON U.S.A. INC.
Inventor： Varadarajan Dwarakanath , Gayani W. Pinnawala , Andrew M. Thomas , Curtis B. Campbell , Andrew M. Davidson , Ping Wang
Abstract: The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.
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公开(公告)号：US12012547B2
公开(公告)日：2024-06-18
申请号：US17771587
申请日：2020-10-30
Applicant: CHEVRON U.S.A. INC. , CHEVRON ORONITE COMPANY LLC
Inventor： Gayani W. Pinnawala , Varadarajan Dwarakanath , Andrew M. Thomas , Curtis B. Campbell , Andrew M. Davidson , Ping Wang
Abstract: The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.
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