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公开(公告)号：US09617464B2
公开(公告)日：2017-04-11
申请号：US15340747
申请日：2016-11-01
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Robert G. Shong , Gregory A. Winslow , Sophany Thach
Abstract: In an embodiment of the disclosure, mixtures of different carbon length alcohols are used as the primary feedstock for Guerbet alcohols. Specifically, embodiments relate to a method of synthesizing mixed molecular weight additives from a mixture of primary alcohols comprising, receiving a mixture of primary alcohols having greater than two different chain length primary alcohols and reacting the mixture of primary alcohols in a single reactor to produce a mixture of at least five Guerbet alcohols. The mixture of Guerbet alcohols can then be used to produce an additive or surfactant composition comprising additives or surfactants of different molecular weights.
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公开(公告)号：US09605198B2
公开(公告)日：2017-03-28
申请号：US14673425
申请日：2015-03-30
Applicant: Chevron U.S.A. Inc.
Inventor： Robert Shong , Varadarajan Dwarakanath , Sophany Thach , Gregory Winslow
Abstract: In an embodiment of the disclosure, mixtures of different carbon length alcohols are used as the primary feedstock for Guerbet alcohols. Specifically, embodiments relate to a method of synthesizing mixed molecular weight additives from a mixture of primary alcohols comprising, receiving a mixture of primary alcohols comprising at least two different chain length primary alcohols and reacting the mixture of primary alcohols to produce a mixture of Guerbet alcohols. The mixture of Guerbet alcohols is then used to produce an additive composition comprising additives of different molecular weights.
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公开(公告)号：US20170044424A1
公开(公告)日：2017-02-16
申请号：US15340747
申请日：2016-11-01
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Robert G. Shong , Gregory A. Winslow , Sophany Thach
Abstract: In an embodiment of the disclosure, mixtures of different carbon length alcohols are used as the primary feedstock for Guerbet alcohols. Specifically, embodiments relate to a method of synthesizing mixed molecular weight additives from a mixture of primary alcohols comprising, receiving a mixture of primary alcohols having greater than two different chain length primary alcohols and reacting the mixture of primary alcohols in a single reactor to produce a mixture of at least five Guerbet alcohols. The mixture of Guerbet alcohols can then be used to produce an additive or surfactant composition comprising additives or surfactants of different molecular weights.
Abstract translation: 在本公开的一个实施方案中，使用不同碳长度的醇的混合物作为Guerbet醇的主要原料。 具体地，实施方案涉及从伯醇的混合物合成混合分子量添加剂的方法，其包括：接收具有大于两个不同链长伯醇的伯醇的混合物，并在单个反应器中使伯醇的混合物反应以产生 至少五种格尔伯特醇的混合物。 然后可将Guerbet醇的混合物用于制备包含不同分子量的添加剂或表面活性剂的添加剂或表面活性剂组合物。
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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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25.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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Patent Agency Ranking
26.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：US11261300B2
公开(公告)日：2022-03-01
申请号：US17121325
申请日：2020-12-14
Applicant: Chevron U.S.A. Inc.
Inventor： Do Hoon Kim , Dennis A. Alexis , Varadarajan Dwarakanath , David R. Espinosa , Taimur Malik , Peter G. New , Adam C. Jackson , Christopher Michael Niemi
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 aqueous polymer solutions by combining these LP compositions with an aqueous fluid. The resulting aqueous 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 μm filter. Also provided are methods of using these aqueous polymer solutions in oil and gas operations, including enhanced oil recovery.
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公开(公告)号：US11084973B2
公开(公告)日：2021-08-10
申请号：US16851875
申请日：2020-04-17
Applicant: Chevron U.S.A. Inc.
Inventor： Do Hoon Kim , Dennis Arun Alexis , Varadarajan Dwarakanath , David Espinosa , Taimur Malik , Logan Jackson , Tom Lynch , Ronald Robinson , Frances Fournier , Hong Yang , Sukhjit Aujla
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 μm filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
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公开(公告)号：US11008502B2
公开(公告)日：2021-05-18
申请号：US16262216
申请日：2019-01-30
Applicant: Chevron U.S.A. Inc. , Chevron Oronite Company LLC
Inventor： Dennis A. Alexis , Gayani Pinnawala Arachchilage , Varadarajan Dwarakanath , Do Hoon Kim , Taimur Malik , Gregory A. Winslow , Aaron Wilhelm
IPC: E21B43/26 , C09K8/584 , C09K8/588 , C09K8/68 , F17D1/16 , C09K8/88 , C09K8/52 , C08L33/26 , C09K8/60 , C08K5/09 , C08K5/37
Abstract: Disclosed are compositions and methods for use in oil and gas operations.
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公开(公告)号：US10851629B2
公开(公告)日：2020-12-01
申请号：US16421909
申请日：2019-05-24
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Robert G. Shong , Gregory A. Winslow , Taimur Malik , Marlon Solano
Abstract: Additional oil recovery is obtained from a reservoir with a composition comprising at least a coupling solvent typically employed in waterborne coating compositions. Provided herein are embodiments of methods of recovering hydrocarbons using at least one coupling solvent, such as an oxygenated coupling solvent. The coupling solvent increases the mutual solubility with water at the injection temperature to facilitate the mixing and injection, particularly with an optional co-solvent. The coupling solvent helps mitigate formation plugging and improve performance when injected into a formation, as the solvent mixture moves from being miscible in the injection field water to being miscible in the reservoir oil, mobilizing the reservoir oil to increase oil recovery.
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