公开(公告)号：US20230132932A1

公开(公告)日：2023-05-04

申请号：US18052231

申请日：2022-11-03

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Syed M. Shakil HUSSAIN ,  Muhammad Shahzad KAMAL ,  Abdullah S. SULTAN

IPC: C07C237/16 ,  C09K8/584 ,  C07C381/06 ,  C11D1/00 ,  C07C233/36 ,  C07C233/38

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.

公开(公告)号：US20210222052A1

公开(公告)日：2021-07-22

申请号：US16748339

申请日：2020-01-21

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Muhammad Shahzad KAMAL ,  S.M. Shakil HUSSAIN ,  Mobeen MURTAZA ,  Mohamed MAHMOUD

IPC: C09K8/60

Abstract: Amidoamine-based gemini surfactants having dual chains connected via an arylene or heteroarylene 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.

公开(公告)号：US20240218237A1

公开(公告)日：2024-07-04

申请号：US18607891

申请日：2024-03-18

Applicant: King Fahd University of Petroleum and Minerals

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.

公开(公告)号：US20230374368A1

公开(公告)日：2023-11-23

申请号：US18364596

申请日：2023-08-03

Applicant: King Fahd University of Petroleum and Minerals

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.

公开(公告)号：US20210189222A1

公开(公告)日：2021-06-24

申请号：US16718616

申请日：2019-12-18

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Muhammad Shahzad KAMAL ,  S.M. Shakil Hussain ,  Mobeen Murtaza ,  Mohamed Mahmoud

IPC: C09K8/60

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.

公开(公告)号：US20200181479A1

公开(公告)日：2020-06-11

申请号：US16585908

申请日：2019-09-27

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Syed M. Shakil HUSSAIN ,  Muhammad Shahzad KAMAL

IPC: C09K8/584 ,  B01F17/00 ,  C09K8/588

Abstract: Amidoamine-based gemini surfactants having dual chains connected via an alkyl linker. Each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. Properties of the surfactant including thermal stability, critical micelle concentration, and foam stability are specified. A method of recovering oil from a reservoir using an aqueous composition that contains the surfactant and a polymer (e.g. AM-AMPS) is also provided. This method is particularly effective for oil recovery in reservoirs of high temperature and/or high salinity.

公开(公告)号：US20240301271A1

公开(公告)日：2024-09-12

申请号：US18616739

申请日：2024-03-26

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

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.

公开(公告)号：US20210102113A1

公开(公告)日：2021-04-08

申请号：US16749342

申请日：2020-01-22

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： S. M. Shakil HUSSAIN ,  Muhammad Shahzad KAMAL

IPC: C09K8/584 ,  C07C229/12 ,  C07C305/10 ,  C07C305/04 ,  C09K8/06 ,  C09K8/68

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.

公开(公告)号：US20200368640A1

公开(公告)日：2020-11-26

申请号：US16416774

申请日：2019-05-20

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Ahmad A. ADEWUNMI ,  Muhammad Shahzad KAMAL ,  Theis Ivan SOLLING ,  Babatunde Abiodun SALAMI

IPC: B01D17/04 ,  C10G33/04 ,  B01D17/02

Abstract: A method of demulsifying an emulsion of oil and water whereby palm oil fuel ash, which is a low cost waster product obtained from oil palm processing, is added to the emulsion and the resulting mixture is agitated, thereby breaking the emulsion into an aqueous phase and an oil phase. Solid particles of palm oil fuel ash settle to the bottom of the aqueous phase, allowing easy separation of the oil phase, the aqueous phase, and the settled solid particles of palm oil fuel ash.

公开(公告)号：US20200325381A1

公开(公告)日：2020-10-15

申请号：US16578786

申请日：2019-09-23

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Muhammad Shahzad KAMAL ,  Mamdouh A. Al-Harthi ,  Hafiz Mudaser Ahmad ,  S.M. Shakil Hussain ,  Mohamed Mahmoud

IPC: C09K8/24

Abstract: A drilling fluid formulation which includes an aqueous phase, and additives including an organophilic clay, a gemini surfactant, and a polyacrylamide. The organophilic clay contains an ion-exchange reaction product of a clay material (e.g. smectite) and quaternary ammonium cations. The polyacrylamide contains reacted units of an acrylamide monomer, an acrylate monomer, and a hydrophobicity modifying monomer. Rheology properties of the drilling fluid including gel strength, yield stress, and storage modulus are specified. The additives present in the drilling fluid synergistically boost its shale swelling inhibition capability.