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公开(公告)号：US20240301270A1
公开(公告)日：2024-09-12
申请号：US18616673
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：US11858878B2
公开(公告)日：2024-01-02
申请号：US18052231
申请日：2022-11-03
Inventor： Syed M. Shakil Hussain , Muhammad Shahzad Kamal , Abdullah S. Sultan
IPC: C07C237/16 , C09K8/584 , C07C381/06 , C11D1/00 , C07C233/36 , C07C233/38 , C07C231/02 , E21B43/16
CPC classification number: C07C237/16 , C07C233/36 , C07C233/38 , C07C381/06 , C09K8/584 , C11D1/00 , C07C231/02 , C09K2208/30 , E21B43/16
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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13.发明授权公开(公告)号：US11447688B2
公开(公告)日：2022-09-20
申请号：US16777221
申请日：2020-01-30
Inventor： Muhammad Shahzad Kamal , S.M. Shakil Hussain , Mobeen Murtaza , Mohamed Mahmoud
IPC: C09K8/86 , C09K8/60 , C07C235/10
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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公开(公告)号：US12180421B1
公开(公告)日：2024-12-31
申请号：US18782094
申请日：2024-07-24
Inventor： Shams Kalam , Sidqi Ahmad Mohammad Abu-Khamsin , Shirish Liladhar Patil , Muhammad Shahzad Kamal
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 contains 89-98.9 vol % of an aqueous solution, 0.01-1 vol % of a gemini cationic surfactant, and 0.1-10 vol % of formic acid based on a total volume of the mixture. During the injecting at least a portion of the gemini cationic surfactant is adsorbed onto the carbonate rock formation, and wherein at least 90% 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 formic acid.
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公开(公告)号：US12157854B2
公开(公告)日：2024-12-03
申请号：US18616673
申请日：2024-03-26
Inventor： Tawfik Abdo Saleh , Azeem Rana , Mobeen Murtaza , Muhammad Shahzad Kamal , Mohamed Mahmoud
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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Patent Agency Ranking
公开(公告)号：US12116524B2
公开(公告)日：2024-10-15
申请号：US18616739
申请日：2024-03-26
Inventor： Tawfik Abdo Saleh , Azeem Rana , Mobeen Murtaza , Muhammad Shahzad Kamal , Mohamed Mahmoud
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：US12031086B1
公开(公告)日：2024-07-09
申请号：US18607891
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：US11795372B2
公开(公告)日：2023-10-24
申请号：US17671103
申请日：2022-02-14
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：US11566167B2
公开(公告)日：2023-01-31
申请号：US16718616
申请日：2019-12-18
Inventor： Muhammad Shahzad Kamal , S. M. Shakil Hussain , Mobeen Murtaza , Mohamed Mahmoud
Abstract: Amidoamine-based gemini surfactants having dual chains connected via an alkenylene or alkynylene linker. Each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. A water-based drilling fluid containing the gemini surfactant is also provided. As examined by linear swelling and free swelling tests, the gemini surfactant is effective in reducing clay swelling.
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公开(公告)号：US11512045B2
公开(公告)日：2022-11-29
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 , C07C381/06 , C11D1/00 , C07C233/36 , E21B43/16 , C07C233/38 , C07C231/02
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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