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11.发明申请公开(公告)号：US20190256458A1
公开(公告)日：2019-08-22
申请号：US16281849
申请日：2019-02-21
Inventor： Syed M. Shakil HUSSAIN , Muhammad Shahzad KAMAL , Abdullah S. SULTAN
IPC: C07C237/16 , C09K8/584
Abstract: The invention concerns synthesized amido-amine-based cationic gemini surfactants with flexible and rigid spacers and different hydrophobic. These gemini surfactants were prepared by modified procedure through amidation of long chain carboxylic acids using 3-(dimethylamino)-1-propylamine followed by treatment with halohydrocarbons and showed excellent thermal stability and surface properties useful for various oilfield applications such as enhanced oil recovery.
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公开(公告)号：US20250065286A1
公开(公告)日：2025-02-27
申请号：US18815212
申请日：2024-08-26
Inventor： Arshad RAZA , Guenther GLATZ , Mohamed MAHMOUD , Mobeen MURTAZA , Alade Olalekan SAHEED , Esmail Mohamed Ali MOKHEIMER , Muhammad Shahzad KAMAL
IPC: F03G7/00
Abstract: A thermochemical engine that includes a reaction chamber having a nitrite source inlet, an ammonium source inlet, and a gas outlet, and a gas-driven energy transducer coupled to the reaction chamber such that a gas produced in the reaction chamber moves the gas-driven energy transducer in a process of exiting the reaction chamber via the gas outlet. The thermochemical engine is configured to produce the gas under pressure by reacting in the reaction chamber a nitrite source comprising a nitrite ion and an ammonium source comprising an ammonium ion in the presence of water at a reaction temperature of 50 to 150° C.
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13.发明申请公开(公告)号：US20250043170A1
公开(公告)日：2025-02-06
申请号：US18364604
申请日：2023-08-03
Inventor： Shams KALAM , Sidqi Ahmad Mohammad ABU-KHAMSIN , Shirish Liladhar PATIL , Muhammad Shahzad KAMAL
IPC: C09K8/584
Abstract: A method of enhanced oil recovery in a carbonate rock formation including injecting a mixture into the carbonate rock formation containing an oil composition and extracting the oil composition from the carbonate rock formation. The mixture includes 90-99.99 vol % of an aqueous solution and 0.01-10 vol % of a gemini cationic surfactant based on a total volume of the mixture and 1-2000 parts per million (ppm) of methylene blue, based on a total weight of the mixture. During the injecting at least a portion of the gemini cationic surfactant is adsorbed onto the carbonate rock formation, and at least 50% less by volume of the gemini cationic surfactant adsorbs onto the carbonate rock formation compared to a method under the same conditions but without the methylene blue.
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14.发明公开公开(公告)号：US20240301269A1
公开(公告)日：2024-09-12
申请号：US18616632
申请日：2024-03-26
Inventor： Tawfik Abdo SALEH , Azeem RANA , Mobeen MURTAZA , Muhammad Shahzad KAMAL , Mohamed MAHMOUD
IPC: C09K8/20
CPC classification number: C09K8/206 , C09K2208/12
Abstract: A drilling fluid composition includes an aqueous base fluid, 0.01 to 10 wt. % of a date palm leaves extract (DPLE), 1 to 10 wt. % of clay particles, and 0.01 to 1 wt. % of a base, where each wt. % based on a total weight of the drilling fluid composition. The DPLE is homogenously disposed on surfaces of the clay particles. The clay particles disposed with the DPLE are present in the drilling fluid composition in the form of a composite. A pellet made from the clay particles treated with the DPLE has a swelling value at least 75% less than a swelling value of the pellet in an aqueous composition that does not contain the DLPE. A method of making the drilling fluid composition.
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公开(公告)号：US20240218238A1
公开(公告)日：2024-07-04
申请号：US18607916
申请日：2024-03-18
Inventor： Mohamed MAHMOUD , Muhammad Shahzad KAMAL
IPC: C09K8/528
CPC classification number: C09K8/528
Abstract: A method of removing a sulfate scale from a surface is provided. The method includes contacting the sulfate-comprising scale with a conversion solution including 1 to 10 wt. % of an alkali metal carbonate, 0.5 to 10 wt. % of a borate salt or hydrate thereof, and 0.5 to 2.5 wt. % of a base to produce a carbonate-comprising scale. The method further includes exposing the carbonate-comprising scale with an acid solution including 2.5 to 25 wt. % of an acid.
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Patent Agency Ranking
公开(公告)号：US20240218236A1
公开(公告)日：2024-07-04
申请号：US18607836
申请日：2024-03-18
Inventor： Mohamed MAHMOUD , Muhammad Shahzad KAMAL
IPC: C09K8/528
CPC classification number: C09K8/528
Abstract: A method of removing a sulfate scale from a surface is provided. The method includes contacting the sulfate-comprising scale with a conversion solution including 1 to 10 wt. % of an alkali metal carbonate, 0.5 to 10 wt. % of a borate salt or hydrate thereof, and 0.5 to 2.5 wt. % of a base to produce a carbonate-comprising scale. The method further includes exposing the carbonate-comprising scale with an acid solution including 2.5 to 25 wt. % of an acid.
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公开(公告)号：US20230138419A1
公开(公告)日：2023-05-04
申请号：US18146205
申请日：2022-12-23
Inventor： S. M. Shakil HUSSAIN , Muhammad Shahzad KAMAL
IPC: C09K8/584 , C07C229/12 , C09K8/68 , C07C305/04 , C09K8/06 , C07C305/10
Abstract: A surfactant of formula (I) wherein each of R1 and R2 are independently a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, or an optionally substituted arylalkyl, R3 and R4 are independently an optionally substituted alkyl, an optionally substituted cycloalkyl, or an optionally substituted arylalkyl, x is an integer in a range of 2-8, y is an integer in a range of 1-15, z is an integer in a range of 4-10, n is an integer in a range of 2-5, and A is one of a carboxybetaine group, a sulfobetaine group, or a hydroxy sulfobetaine group. An oil and gas well servicing fluid containing the surfactant and methods of servicing an oil and gas well are also described.
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公开(公告)号：US20230076912A1
公开(公告)日：2023-03-09
申请号：US17671103
申请日：2022-02-14
Inventor： Mohamed MAHMOUD , Muhammad Shahzad KAMAL
IPC: C09K8/528
Abstract: A method of removing a sulfate scale from a surface is provided. The method includes contacting the sulfate-comprising scale with a conversion solution including 1 to 10 wt. % of an alkali metal carbonate, 0.5 to 10 wt. % of a borate salt or hydrate thereof, and 0.5 to 2.5 wt. % of a base to produce a carbonate-comprising scale. The method further includes exposing the carbonate-comprising scale with an acid solution including 2.5 to 25 wt. % of an acid.
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公开(公告)号：US20210238998A1
公开(公告)日：2021-08-05
申请号：US16779923
申请日：2020-02-03
Inventor： Mahmoud ELSAYED , Mohamed MAHMOUD , Ammar EL-HUSSEINY , Muhammad Shahzad KAMAL , Karem AL-GARADI
Abstract: A method for assessing an optimal acid injection rate in the process of hydrocarbon formation stimulation. The method comprises evaluating an anisotropic diffusion coefficient by pulsed gradient NMR, introduction of a semi-empirical correction based on comparison of the downhole conditions with the library of laboratory experiments where such corrections were measured, extrapolation of the library data to the real downhole conditions. The improved values of the diffusion coefficients are applied in determining wormhole regime conditions that are optimal in terms of acid consumption per a unit of stimulated yield of the hydrocarbon.
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20.发明申请公开(公告)号：US20210238472A1
公开(公告)日：2021-08-05
申请号：US16777221
申请日：2020-01-30
Inventor： Muhammad Shahzad KAMAL , S.M. Shakil HUSSAIN , Mobeen MURTAZA , Mohamed MAHMOUD
IPC: C09K8/60 , C07C235/10 , C09K8/86
Abstract: Methods of controlling clay swelling and stabilizing subterranean geological formations containing swellable clays (e.g., montmorillonite, bentonite) are described. The methods involve treating the swellable clays with a composition containing an amidoamine-based gemini surfactant. The gemini surfactant has dual chains connected via an alkylene linker, whereby each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. As examined by linear swelling and free swelling tests, use of the gemini surfactant is effective in reducing swelling of the clays.
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