-
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.
-
42.发明授权公开(公告)号：US11827837B2
公开(公告)日：2023-11-28
申请号：US16373137
申请日：2019-04-02
Inventor： Abdelmjeed Mohamed , Salaheldin Elkatatny , Mohamed Mahmoud
CPC classification number: C09K8/18 , C09K8/16 , C09K2208/34
Abstract: An drilling mud composition is described, which includes an aqueous base fluid, a viscosifier, and a weighting material. The drilling mud composition also includes an anti-sagging agent that comprises a dimethylamino methyl ester, such as methyl 5-(dimethylamino)-2-methyl-5-oxopentanoate. The anti-sagging agent may be used to prevent barite sagging, where barite is used as a weighting material. Small amounts of the anti-sagging agent may be used to maintain a low sag factor while drilling, and without causing unwanted increases in viscosity. The anti-sagging agent is effective for both vertical and inclined wellbores.
-
公开(公告)号：US11795813B2
公开(公告)日：2023-10-24
申请号：US17692419
申请日：2022-03-11
Inventor： Abdullatif Al-Shuhail , Mohamed Mahmoud , Rakan Fadhel
IPC: E21B47/107 , E21B49/00 , E21B47/085
CPC classification number: E21B47/107 , E21B47/085 , E21B49/005
Abstract: A formation evaluating system including a sonic sensor device attached to a drill string adjacent to a bit includes a sonic source and a first sonic receiver aligned adjacent to the sonic source, and a second sonic receiver aligned with a horizontal offset X. Three kind of two-way trip times are measured: from the sonic source to a) the first receiver after a reflection at the borehole wall, b) the first receiver after propagation in a layer below the borehole wall, an invaded zone, and a reflection at an interface below the borehole wall, and c) the second receiver after oblique propagations in the invaded zone and a reflection at the interface. After determining a sonic speed in the drilling mud and a sonic speed in a matrix of the invaded zone, a porosity and a thickness of the invaded zone are estimated based on a time average equation.
-
公开(公告)号：US11795378B2
公开(公告)日：2023-10-24
申请号：US16386468
申请日：2019-04-17
Inventor： Badr Ba Geri , Mohamed Mahmoud , Salaheldin Elkatatny , Shirish Patil
CPC classification number: C09K8/74 , C09K8/54 , E21B41/02 , E21B43/25 , C09K2208/32
Abstract: Well stimulating fluids and methods may use a first and a second chelating agent, e.g., diethylene triamine pentaacetic acid (DTPA), glutamic diacetic acid (GLDA), and/or hydroxyethyl ethylene diamine triacetic acid (HEDTA), particularly in amounts of from 1 to 10 wt. %, to control iron precipitation during the stimulation process. Such fluids can stabilize iron ions without precipitation to manage the efficiency and performance of the stimulation fluid. Such stimulation fluids can be used with for highly concentrated HCl solutions, e.g., more than 20 up to 28 wt. % or more, that are useful in emulsified acid formulations in acid fracturing or acidizing of carbonate formations.
-
45.发明授权公开(公告)号：US11566161B2
公开(公告)日：2023-01-31
申请号：US16733495
申请日：2020-01-03
Inventor： Salaheldin Elkatatny , Mohamed Mahmoud , Abdullah Sultan
Abstract: A method of removing calcium-containing water-based filter cake from a wellbore involving contacting the calcium-containing filter cake with a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, and a surfactant. The method is performed at a pressure of 200 to 400 psi and a temperature of 50 to 125° C. The method removes calcium-containing filter cake made of water, calcium carbonate, a polymer or starch and a clay. The method meets industry standard steel corrosion rates of less than 0.049 lb/ft2 per day. Also disclosed is a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, and a surfactant that meets OECD 301B thresholds for ready biodegradability.
-
Patent Agency Ranking
公开(公告)号：US11543370B2
公开(公告)日：2023-01-03
申请号：US17402666
申请日：2021-08-16
Inventor： Mahmoud Elsayed , Ammar El-Husseiny , Mohamed Mahmoud , Karem Al-Garadi
Abstract: A method for predicting formation permeability by measuring diffusional tortuosity in several directions by pulse gradient NMR. The method comprises evaluating an anisotropic diffusion coefficient by pulsed gradient NMR, determining diffusional tortuosity from the restricted diffusion data, supplementing the NMR results with resistivity and sonic logging data, measuring anisotropic tortuosity and porosity by resistivity and sonic data and combining all components in a single fitting model. The 11-coefficient model is trained to recognize the true values of permeability by comparing the real oil permeabilities measured in a library of oil-carrying rock cores with the NMR, resistivity and sonic correlates. The fitting coefficients are extracted by minimizing the discrepancy between the laboratory measured permeabilities and the predicted values combining all rapid logging information components with the agreement-maximizing weights.
-
公开(公告)号：US11543369B2
公开(公告)日：2023-01-03
申请号：US17402660
申请日：2021-08-16
Inventor： Mahmoud Elsayed , Ammar El-Husseiny , Mohamed Mahmoud , Karem Al-Garadi
Abstract: A method for predicting formation permeability by measuring diffusional tortuosity in several directions by pulse gradient NMR. The method comprises evaluating an anisotropic diffusion coefficient by pulsed gradient NMR, determining diffusional tortuosity from the restricted diffusion data, supplementing the NMR results with resistivity and sonic logging data, measuring anisotropic tortuosity and porosity by resistivity and sonic data and combining all components in a single fitting model. The 11-coefficient model is trained to recognize the true values of permeability by comparing the real oil permeabilities measured in a library of oil-carrying rock cores with the NMR, resistivity and sonic correlates. The fitting coefficients are extracted by minimizing the discrepancy between the laboratory measured permeabilities and the predicted values combining all rapid logging information components with the agreement-maximizing weights.
-
48.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.
-
公开(公告)号：US11414593B2
公开(公告)日：2022-08-16
申请号：US16560501
申请日：2019-09-04
Inventor： Ibrahim Gomaa , Mohamed Mahmoud , Khaled Zidan Abdelgawad , Amjed Hasan , Dhafer Al-Shehri
IPC: C09K8/74
Abstract: A method for generating hydrofluoric acid (HF) in-situ in a subterranean formation (e.g. sandstone formation) by simultaneously injecting an acid generating component having ammonium fluoride and an oxidizing agent and a heat generating component having ammonium and nitrite salts into a wellbore of the formation. The method optionally involves a pre-flush of an acid (e.g. HCl) containing solution prior to the injecting. HF is generated via an endothermic reaction of the ammonium fluoride and the oxidizing agent with the assistance of the heat provided by an exothermic reaction of the ammonium and nitrite salts. The method is effective in enhancing permeability of the formation by at least 30%.
-
公开(公告)号：US11407933B2
公开(公告)日：2022-08-09
申请号：US16665729
申请日：2019-10-28
Inventor： Mohamed Mahmoud , Abdelwahab Ali Zaki
Abstract: A method of controlling the fracture location, orientation, and reduce the breakdown pressure in multistage fracturing, particularly of unconventional reservoirs. Acid etching can be used to initiate small channels (wormholes) around the horizontal well, followed by the hydraulic fracturing fluid to create the fractures. The fracture orientation can follow the same direction of the etched part of the well and in the same location of the wormholes. The breakdown pressure can be reduced by 5, 10, 15%, or more, e.g., from 2200 to 1800 psi after acid etching which can minimize the pumping requirements at the surface and break the formation with very high breakdown pressure.
-
-
-
-
-
-
-
-
-
Search Results
54
records
(took 0.026 seconds)
