Al-Arfaj
Abdul Rahman Al-Arfaj, Dhahran SA
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20150079692 | METHOD OF DETERMINING PHENOXY HERBICIDES IN WATER SAMPLES BY PHASE TRANSFER MICROEXTRACTION WITH SIMULTANEOUS DERIVATIZATION AND GAS-CHROMATOGRAPHY MASS-SPECTROMETRY ANALYSIS - A method for determining the concentration of a phenoxy herbicide in an aqueous sample, by simultaneously phase-transfer catalyst extracting and alkylating an aqueous sample comprising a phenoxy herbicide to form a sample composition, and measuring an amount of the alkylated phenoxy herbicide in the sample composition. The method includes controlling factors such as pH of the aqueous matrix, temperature, extraction duration, type and amount of derivation reagents, and type and amount of phase transfer catalyst. | 03-19-2015 |
Mohammed Al-Arfaj, Dhahran SA
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20140174168 | METHOD FOR ASSESSING ABLATION MODULAI OF MUDCAKES TO PREDICT EASE OF MUDCAKE REMOVAL OR CLEANING EFFICIENCY OF CLEANING/WASHING/SPACER FLUIDS - Disclosed is a method and apparatus for determining an ablation modulus of a mudcake on a wellbore wall. According to various embodiments of the invention, the method includes preparing a mudcake, forming a mudcake assemblage comprising the prepared mudcake, screen, and a filter paper, and submerging and securing the mudcake assemblage in a container filled with a fluid. The fluid includes one of a native fluid and a foreign fluid to the mudcake. The method further includes agitating the fluid for a plurality of time intervals, removing the mudcake assemblage from the container after expiration of each time interval, and drying the mudcake assemblage. Further, the method includes weighing the mudcake assemblage to determine an interval weight for each time interval, and determining the ablation modulus of the mudcake on the wellbore wall by graphically correlating the determined interval weights of the remaining mudcake in the mudcake assemblage as a function of time. The ablation modulus of the mudcake is defined by a slope of a tangent of an initial portion of the graphical correlation between the determine interval weights and cumulative time. | 06-26-2014 |
Mohammed Al-Arfaj, Dammmam SA
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20140295559 | METHOD FOR PREDICTION OF INHIBITION DURABILITY INDEX OF SHALE INHIBITORS AND INHIBITIVE DRILLING MUD SYSTEMS - Embodiments of a method used for determination of inhibition durability index (IDI) of an inhibitive mud system can include multiple stages, with each stage including specific steps. The first stage can include a dispersion test that evaluates the inhibition effects of a stability inhibitor after exposing the test material to the inhibitor. The second stage can include a durability inhibition assessment, which includes assessing the longevity of the effect of the inhibitor. A third stage can be used to graph or otherwise evaluate the results of the second stage or the first and second stages. | 10-02-2014 |
Mohammed K. Al-Arfaj, Dammam SA
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20130065798 | WATER-BASED DRILLING FLUID COMPOSITION HAVING A MULTIFUNCTIONAL MUD ADDITIVE FOR REDUCING FLUID LOSS DURING DRILLING - Embodiments of the invention provide a drilling, drill-in, and completion water-based mud composition containing micro or nanoparticles for use in hydrocarbon drilling. The water-based drilling mud composition includes water present in an amount sufficient to maintain flowability of the water-based drilling mud composition, and drilling mud, which includes particles. The particles are selected from microparticles, nanoparticles, and combinations thereof. The water-based drilling mud composition also includes an effective amount of a multi-functional mud additive, which includes psyllium seed husk powder. The water-based drilling mud composition is operable to keep the particles stabilized and dispersed throughout the drilling mud composition in the absence of a surfactant. | 03-14-2013 |